Antimony trioxide,Flame retardant masterbatch,Additive Masterbatches: Halogen-Free Masterbatch

Showing posts with label Halogen-Free Masterbatch. Show all posts

Friday, 28 November 2008

[+/-] : Decabromodiphenyl oxide masterbatch

poster:jiefu Metal Supplier date: 04:41:00 0 feedback:

[+/-] : Decabromodiphenyl ethane masterbatch

poster:jiefu Metal Supplier date: 04:35:00 0 feedback:

Saturday, 20 October 2007

[+/-] : Antimony price rise slightly in America

poster:jiefu Metal Supplier date: 22:04:00 0 feedback:

As the U.S. dollar is getting weaker in the last two weeks, antimony trioxide producers revised their offers, and American market participants reported to Asian Metal that price in U.S. is edging up slightly.

A U.S. trader revealed that the current prevailing price of 99.5%min antimony trioxide is in the range of USD2.5-2.55/lb delivered to customer, and the price for the same material was around USD2.45/lb two weeks ago. According to him, demand is regular compared to the previous years. “Although automobile industry is weak in America, plastic is in strong demand, so the total demand remains stable,” remarked the source.

He pointed out that the U.S. dollar is depreciating in the world market against Chinese RMB and European EURO, so the Chinese suppliers do not want to bear the loss “They have revised the offers and selling at more expensive prices now,” said the trader who takes that with the fix market operation mode, American consumers are not very sensitive to the prices, so as long as the price is acceptable, the customers are placing orders with their distributors.

An executive from a antimony trioxide consumer disclosed to Asian Metal that the last batch of the material he bought was one month ago at USD2.41/lb delivered to the plant, and he was asking for an offer from his supplier earlier this week which was a few cents higher at close to USD2.5/lb delivered to plant. Somehow, the source claimed that he did expect the price to go up.

“I was told by my supplier that antimony trioxide is getting more expensive because RMB is more expensive,” said the executive who believes price is more likely to remain strong for the rest of the year. “There is no sign that the American economy will recover anytime in this year, which means the currency exchange rate will remain weak for U.S. dollar. We may be more competitive in the export market now, but we buy material at higher prices from overseas.”

We can supply any quantity and any kind of Antimony products from stock.would you please inform us how many you need and your target price, then we will confirm ASAP. We are sincerely hope to do business with you and establish long term business relationship with your respectable company.

Look forward to hearing from you soon.

Best regards,

Sam Xu
Contact me:
MSN: xubiao_1996@hotmail.com
GMAIL: samjiefu@gmail.com
SKPYE:jiefu1996

Chinese antimony market

...
read more

Friday, 28 September 2007

[+/-] : What is a Masterbatch?

poster:jiefu Metal Supplier date: 20:35:00 0 feedback:

Tuesday, 18 September 2007

[+/-] : Plastic additives supply shifts as prices ease

poster:jiefu Metal Supplier date: 00:19:00 0 feedback:

Supply of plastic additives for the next 12–18 months looks secure and pricing spikes are beginning to ease. But buyers may have to look to new regions for continued supply.

Fred Gastrock of Townsend Polymers Services and Information in Houston forecasts global sales to hit 27 billion lbs in 2009, but the regions of supply are changing. "Additive plants are moving toward the markets," according to Gastrock, who points out that developing countries first build polymer plants, then resin plants and finally additive plants. However, currently there is still a strong international trade in polymer additives.

Regions and countries where additives production is growing rapidly include China with a growth rate for additives production of 8–10% by volume annually. In much of the rest of Asia and in the Middle East the annual growth rate is in the "high single digits" according to Gastrock. Production in India, Russia and Turkey is growing rapidly from a small annual production base of 10 million tons, 5 million tons, and 3.3 million tons respectively.

Philadelphia-based Rohm and Haas provides an example of the globalization occurring in the additives industry. The firm is working with Turkish firm Polisan on several projects, including a partnership for the manufacture of emulsions for the paint market. Late last year, Rohm and Haas signed a letter of intent and announced that it is in the final planning discussions with Polisan to construct a plastics additives plant in Gebze, Turkey. The plant will produce acrylic impact modifier and processing aids. Planned capacity is 40,000 metric tons annually.

Meanwhile, in China, Rohm and Haas and China's Weihai Jinhong Polymer signed an agreement last January to form a new joint venture. Jinhong Rohm and Haas Chemicals Co. (JinHaas), intends to manufacture a complete range of quality plastics additives products and provide technical support to the building and construction and PVC packaging segments of the Chinese market according to Rohm and Haas.

While the U.S. is not building new plants, there are few shutdowns of existing plants. Rohm and Haas intends to meet slowly growing domestic market needs though its existing U.S. plants. In Europe, there have been some recent plant shutdowns. Chemtura is shutting down some antioxidant plants.

Demand for U.S. additives is growing 3–4% by volume annually. European sales growth is slightly less, at 2–3%. Japanese sales growth is less than Europe's. Asia sales are growing rapidly as new polymer plants come online. Plasticizers constitute 55% of the total additives market. The various market components and their relative size.

Rohm and Haas, Chemtura and Ciba produce a broad range of plastic additives. Other major producers include Arkema, Rohm and Haas, Albemarle and Baerlacher. Major plasticizer producers include ExxonMobil, BASF and Eastman Chemicals. Large independent compounders include PolyOne, A. Schulman, Clariant and RTP.

Gastrock forecasts overall U.S. additive sales will grow 3–4% annually through 2009. The additive types increasing faster than this average are growing from a smaller base. These include light stabilizers and nucleating agents (clarifying agents). Polypropylene additive use is growing slightly faster than the average. Additives used in wood—plastic composites are also growing more rapidly than average but from a small base.

The big feedstock price surge that took hold in 2004 through early 2006 and pushed additive prices up 20–50% has slowed considerably. Margins have improved and additives producers have been able to manage most of the raw materials price increases.

We can supply any quantity and any kind of Antimony products from stock.would you please inform us how many you need and your target price, then we will confirm ASAP. We are sincerely hope to do business with you and establish long term business relationship with your respectable company.

Look forward to hearing from you soon.

Best regards,

Sam Xu
Contact me:
MSN: xubiao_1996@hotmail.com
GMAIL: samjiefu@gmail.com
SKPYE:jiefu1996

Chinese antimony market

...
read more

Saturday, 15 September 2007

[+/-] : Flame retardant polyolefin pallets and flame retardant master batch for their production

poster:jiefu Metal Supplier date: 19:12:00 0 feedback:

Polyolefin-based pallets capable of passing standard pallet flammability tests are prepared by molding the pallet or one or more subassemblies thereof, of a polyolefin molding resin containing a flame retardant package containing a halogenated organic flame retardant, alumina trihydrate, and antimony trioxide. The flame retardants are advantageously supplied as a master batch at a concentration higher than that desired in the pallet or subassembly, in a polyolefin-compatible polymer.

Claims

What is claimed is:

1. A flame retardant molded polyolefin pallet comprising one or more subassemblies, at least one subassembly comprising a polyolefin containing a flame retardant package comprising as flame retardant components

a) 4-14% halogenated organic flame retardant,

b) 4-15% alumina trihydrate, and

c) 1-5% antimony trioxide, said percentages based on the weight of polyolefin and the sum of flame retardant components a) to c).

2. The pallet of claim 1 wherein the flame retardant components comprise

a) 7-12% halogenated organic flame retardant;

b) 8-12% alumina trihydrate;

c) 2-4% antimony trioxide; and

said percentages based on the weight of polyolefin and the sum of flame retardant components a) to c).

3. The pallet of claim 1, wherein subassemblies which comprise the most flammable portions of said pallet contain said flame retardant components.

4. The pallet of claim 1, wherein all of said subassemblies contain said flame retardant components.

5. The pallet of claim 1, wherein said polyolefin comprises polypropylene.

6. The pallet of claim 1, wherein said one or more subassemblies containing said fire retardant components further comprise a filler, fibrous reinforcement, or both filler and fibrous reinforcement.

7. The pallet of claim 1, further comprising one or more auxiliary flame retardants.

8. The pallet of claim 1, wherein said halogenated flame retardant comprises tetrabromobisphenol A.

9. A process for the manufacture of a flame retardant polyolefin pallet or subassembly thereof, comprising

a) supplying a polyolefin molding resin

b) supplying a flame retardant package comprising flame retardant components

b)i) from 4-14% halogenated organic flame retardant;

b)ii) from 4-15% alumina trihydrate;

b)iii) from 1-5% antimony trioxide;

c) uniformly blending said polyolefin resin with the components b)i to b)iii of said flame retardant package to form a flame retardant-containing polyolefin molding resin; and

d) molding a polyolefin pallet or subassembly thereof from said flame retardant-containing polyolefin molding resin.

10. The process of claim 9, wherein said flame retardant components are supplied in a master batch of a polyolefin compatible polymer resin containing said flame retardant components in an amount higher than the amount desired in said pallet or subassembly thereof, and supplying sufficient polyolefin to reduce the level of said flame retardant components to the range of 4-14% a), 4-15% b), and 1-5% c).

11. The process of claim 9, wherein said pallet comprises at least a top deck and a bottom deck, optionally having a plurality of columns between said top deck and said bottom deck, at least one of said top deck, said bottom deck, or said columns being molded from a polymer of different flammability characteristics than another of said top deck, bottom deck, or columns.

12. The process of claim 11, comprising molding said top deck of said flame retardant-containing polyolefin molding resin.

13. The process of claim 11, further comprising constructing said top deck or a portion thereof of a non-polyolefin polymer which exhibits greater inherent flammability resistant characteristics than polyolefin.

14. The process of claim 9, wherein said polyolefin comprises polypropylene.

15. The process of claim 9, wherein said polyolefin pallet or subassembly thereof further contains a filler, fibrous reinforcement, or a mixture thereof.

16. A flame retardant polymer master batch suitable for addition to a polyolefin molding resin to prepare the pallet or subassembly thereof of claim 1, said master batch comprising 20 weight percent or more halogenated organic flame retardant, 20 weight percent or more of alumina trihydrate; 6 weight percent or more of antimony trioxide, and at least 10 weight percent of a polymer which is compatible with polyolefin in injection molding.

17. The master batch of claim 16, comprising 20 to 25% halogenated flame retardant, 20 to 40% alumina trihydrate, 6 to 15% antimony trioxide, and minimally 10% polyolefin-compatible polymer, said percentages being based on the total weight of the master batch.

18. The master batch of claim 16, comprising 25-35% halogenated organic flame retardant, 25-40% alumina trihydrate, and 8-12% antimony trioxide, balance polyolefin.

19. The master batch of claim 16 wherein said polyolefin comprises polypropylene.

20. The master batch of claim 16, wherein said halogenated organic flame retardant comprises tetrabromobisphenol A.

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention pertains to flame retardant shipping pallets of polyolefin plastic.

2. Background Art

In the past, shipping pallets were made largely of wood. More recently, numerous materials have at least partially superseded wood-based pallets. For example, pallets of injection molded polymers are being used increasingly. Such polymer pallets have numerous advantages. For example, polymer pallets are capable of being molded in complex shapes which facilitate the shipping of numerous types of articles. Polymer pallets are also easy to clean, which encourages their reuse.

Wood pallets are inherently combustible, and are rather easily ignited. While polymer articles are in general somewhat more difficult to ignite, once ignited they also constitute combustible products, and pound for pound have more potential energy than wood articles. In the shipping industry, empty pallets are often stacked together for reuse or for return to the shipper ("idle storage"). When wood pallets are so stacked and ignited, the fire is generally concentrated in an upward direction. However, when polymer pallets burn, in addition to having greater potential energy (combustibility), the flame can also spread downward by dripping. Thus, the combustion of polymer pallets involves more heat and more potential energy, a combustion mechanism not found in wood pallets. Thus, it is desirable to minimize the combustibility and heat release, and in turn lower the flame spread of polymer based pallets.

One solution which has been proposed is to produce pallets of polymers which are less flammable than pallets of commodity resins, such as polyolefins. However, such speciality polymers, e.g. polyphenylene oxide polymers, are considerably more expensive than the polyolefin polymers conventionally used to manufacture pallets. Such specialty polymers are also, in general, much more difficult to mold than polyolefins.

A standard test for pallet flammability has been established by Underwriters Laboratories, as UL 2335 "Fire Tests of Storage Pallets," referred to, for example, in WO 00/20495. In one version of this test, the "Idle Pallet Test," six stacks of pallets are assembled in a 2×3 array with a 6" longitudinal flue space longitudinally between arrays in a room with a 30 foot high flat ceiling having 165° F. (74° C.) standard response sprinklers having a design density of 0.60 gpm/ft2. An instrumented steel beam is placed near the ceiling, and the pallets are ignited by hydrocarbon soaked cellulosic bundle positioned in the flue space. The parameters assessed include flame spread, maximum steel beam temperature, and number of sprinklers activated. As can be seen, this test is a rather stringent one.

In a second version of the test, the so-called "Commodity Storage Test," a 2×2×2 array 1 of pallets 5, each carrying a Class II commodity carton 2, are placed 25 feet (7.5 m) below a 10 M watt heat release calorimeter 3 and ignited by four igniters in the center flue space, each igniter comprising a 3 inch (12.5 cm) cellulosic bundle soaked with 4 oz. (112 g) heptane in a polyethylene bag. Overhead sprinklers 4 at a height of 10 feet (3 m) are activated electromechanically when the instrumentation indicates that a sprinkler activation temperature of 286° F. (141° C.) has been reached. A series of three tests is made, with water application rates of 0.11, 0.21, and 0.31 gpm/ft2. In each test, four parameters are noted: maximum one minute mean total heat release rate; maximum one minute mean convective heat release rate; effective convective heat release rate, defined as the average convective heat release rate measured over five minutes of the most intense fire; and convective energy, the average convective heat release rate measured over the 10 minutes of most severe burning.

Although numerous flame retardants and combinations thereof are known for use in plastic articles, the stringent tests required of pallets render flame retardancy results unpredictable. Numerous flame retardants and combinations have been tested, and while many of these have been found suitable for polyolefin articles other than pallets, their use in pallets has not proven acceptable.

WO 00/20495 discloses pallets prepared from specialty resins such as polyphenylene ether resins, polycarbonate resins, vinyl aromatic graft copolymer resins, and polyetherimide resins further including arylphosphate esters and zinc chalcogenides. In U.S. Pat. No. 4,727,102, "self extinguishing" polyolefins are disclosed containing major amounts of ammonium polyphosphate, tris(2-hydroxyethyl)isocyanurate, and melamine cyanurate. However, the large amounts of additives (40%) severely compromise the properties of products prepared from the polyolefin resin.

It would be desirable to provide a polyolefin composition suitable for use in molding pallets which is injection moldable, exhibits good flame retardance in standard tests, and which is commercially cost effective. However, until now, tests of flame retardant systems for use in polyolefin polymer pallets did not result in satisfactory performance.

SUMMARY OF THE INVENTION

It has now been surprisingly discovered that polyolefin-based plastic pallets can be manufactured which satisfactorily pass standard pallet flammability tests, when the polyolefin is compounded with a fire retardant package comprising minimally a halogenated flame retardant, alumina trihydrate, and antimony trioxide. The flame retardant ingredients are preferably supplied as a master batch and incorporated into conventional polyolefin molding resins prior to injection molding.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates a typical Commodity Storage Test setup to assess flammability characteristics of pallets;

FIG. 2 illustrates the average steel beam temperature in an Idle Storage Test of flame retardant polymer pallets of the subject invention and similar sized softwood pallets.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The polymer pallets of the present invention may take numerous forms. It has been found convenient to mold pallets in several subassemblies and assemble the pallets together by snap fittings, fusion or adhesive bonding, or by a variety of such assembly techniques. In this manner, non-load bearing areas may be made of thinner section, thus minimizing raw material usage. Moreover, use of a plurality of subassemblies allows pallets of more complex shape to be produced.

The polymer of which the pallets of the subject invention are constructed is polyolefin, although it is not necessary to form all parts of these polymers. Pallet portions which contribute more to ease of flammability or flame spread may be made of other polymers which are less flammable than polyolefin or which tend to melt and/or drip less than polyolefin. A pallet construction which employs portions of different flammabilities which takes advantage of these characteristics is disclosed in commonly assigned U.S. application Ser. No. 10/040,098, filed Oct. 19, 2001, incorporated herein by reference.

The polyolefin polymers may be, for example, but not by way of limitation, polyethylene, polypropylene, or polybutylene. In general, the polyolefin polymers are copolymers, for example copolymers of ethylene with propylene, 1-butene, 1-hexene, 1-octene, or mixtures thereof, or copolymers of propylene with ethylene, 1-butene, 1-hexene, 1-octene or mixtures thereof. Homo and copolymers of propylene are preferred. Different polyolefin polymers may be used for various subassemblies. Polymer blends of polyolefins with other compatible thermoplastics or with elastomeric tougheners such as elastomeric polymers of styrene, butadiene, alkyl acrylates, and the like are also useful. When such tougheners are used, they are generally present in the form of relatively small particles, or as interpenetrating polymer networks, as is well known in the art of toughened thermoplastics.

The polyolefin polymers may also be reinforced or filled. Suitable fillers include typical reinforcing and non-reinforcing fillers such as precipitated and fumed silicas, ground quartz, diatomaceous earth, ground limestone, ground dolomite, ground felspar, mica, expanded mica, precipitated calcium carbonate, etc. The term "reinforcing" with respect to fillers generally refers to fillers of small size and high surface area, for example mean particle sizes <1 µm and specific surface areas (BET) of 50 m2 /g or higher. Suitable fibrous fillers are typically short or long glass fibers. Other fibrous reinforcement such as aramid fiber, carbon fiber, boron nitride fiber, etc., may also be used, however such materials are generally more expensive than glass fibers. Some subassemblies may be filled or may contain fibrous reinforcement whereas other subassemblies may not, or may contain differing reinforcement and/or fillers. Use of continuous fiber reinforcement is also possible in some cases, particularly when polyolefin-based GMT intermediate products are used for molding, or when resin transfer molding and similar techniques are used.

The pallet or at least one of its component subassemblies must contain a flame retardant "FR" package in accordance with the subject invention. The subject invention FR package includes, in percent by weight relative to the total weight of polyolefin and FR package, from 4 to 14% halogenated organic flame retardant, preferably 7 to 12%, and more preferably 8 to 11%; from 4-15%, more preferably 8 to 12% and most preferably 9-11% alumina trihydrate; and 1-5%, more preferably 2 to 4% and most preferably about 3% antimony trioxide (Sb2 O3), these percentages being weight percents based on the weight of polymer and flame retardants. In particular, an FR package containing 8-10% halogenated organic flame retardant, 9-10% alumina trihydrate, and 3% antimony trioxide is used.

The halogenated organic flame retardant includes polyhalogenated organic compounds such as polybrominated biphenyl oxides, halogenated phosphate esters such as tris(2-chloroethyl)phosphate and the like. However, the most preferred halogenated organic flame retardants comprise tetrabromobisphenol A ("TBBA") or admixtures of the latter with other halogenated organic flame retardants. Most preferably TBBA is present in an amount of 50% by weight or more relative to the total halogenated organic flame retardant.

The flame retardant ingredients, when solid, are supplied in pulverulent form, and may be incorporated into the polyolefin by conventional techniques, i.e. in mixers or blenders, but preferably in an extruder. It has been found that preparation of a master batch of the same or different polyolefin or other polyolefin compatible polymer, and containing approximately 2 to 5 times, preferably 2.5 to 4 times the final FR weight percentage is particularly useful. For example, a master batch containing about 30 weight percent organic flame retardant, 32 weight percent alumina trihydrate, and 10% antimony trioxide, balance polypropylene polymer, is highly useful. The master batch is then blended or "diluted" with additional polymer in an extruder prior to injection molding. By "extruder" is meant a screw-type device used to blend thermoplastics to form extrudates or to supply molten thermoplastic to an injection molding machine. The term should not be viewed as limiting, and other mixers may in principle be used.

By the term "polyolefin compatible" or simply "compatible" is meant a polymer which can be blended with polyolefin molding resin and molded into a polyolefin pallet or subassembly thereof while maintaining sufficient strength properties. The compatible polymer may phase separate to form small polymer particles or an interpenetrating polymer network, or may be miscible with the polyolefin. It is preferred that the compatible polymer be itself a polyolefin, particularly the same polyolefin or a polyolefin similar in composition to the polyolefin molding resin. For example, when polypropylene homopolymers or copolymers are used as the polyolefin molding resin, it is preferred that a polypropylene polymer be the polyolefin-compatible polymer of the flame retardant master batch.

The FR package of the present invention may also be used with auxiliary flame agents. Examples include nitrogenous organic compounds such as urea, melamine, and formaldehyde condensates thereof, in the form of powders, prills, fibers, etc., intumescents such as sugars and starches; carbon dioxide generators such as the various metal carbonates, and water generators such as hydrated metal salts. This list is exemplary, and not limiting.

Thus, in preferred embodiments, the pallets of the subject invention are molded of a plurality of subassemblies, which are then joined together, preferably by fusion bonding. In this manner, the composition of the various subassemblies may be varied to optimize pallet physical properties as well as flame retardant properties. For example, one or more of the subassemblies may contain a filler, fibrous reinforcement, or both. Likewise, as indicated previously, those subassemblies which contribute most to flammability may be more highly filled and may also contain higher levels of flame retardant. This is particularly true of the top deck of the pallet. Preferably, all subassemblies contain flame retardant, however.

Preferred pallets have a top deck, a bottom deck, and most preferably a plurality of columns between the top and bottom decks. At least the top deck and preferably all subassemblies are molded from polyolefin resin to which has been added a flame retardant master batch comprising 20 weight percent or more, preferably 20 to 25 weight percent, and most preferably 25 to 35 weight percent of one or more halogenated flame retardant(s); 20 weight percent or more, preferably 20 to 40 weight percent, and more preferably 25 to 40 weight percent alumina trihydrate; and 6 weight percent or more, preferably 6 to 15 weight percent, and more preferably 8 to 12 weight percent of antimony trioxide, at least 10% by weight of the master batch being an olefin compatible polymer.

Having generally described this invention, a further understanding can be obtained by reference to certain specific examples which are provided herein for purposes of illustration only and are not intended to be limiting unless otherwise specified.

EXAMPLE 1 AND COMPARATIVE EXAMPLE C1

Pallets were manufactured by injection molding of subassemblies from polypropylene resin. The subassemblies were assembled into completed pallets and joined together by fusion bonding. The pallet of Example 1 included the FR package of the present invention, added as a master batch containing 30% FR-720 halogenated organic flame retardant, 32% alumina trihydrate, and 10% antimony trioxide, remainder polypropylene. The master batch was added to the extruder with polypropylene resin such that the final polymer of the Example 1 pallet contained 9% FR-720 halogenated organic flame retardant, 9.6% alumina trihydrate, and 3% antimony trioxide. The comparative Example C1 contained no FR package.

Pallet Example
1 C1
Idle Storage Test pass fail
Commodity Storage Test pass fail

EXAMPLE 2 AND COMPARATIVE EXAMPLE C2

An Idle Storage Test as previously described was conducted in stacked 48×40 two-piece construction polymer pallets (polypropylene) which include the FR composition of the subject invention (Example 2). The average steel beam temperatures were plotted against time for these subject invention pallets and standard 48×40 softwood pallets. The results were presented graphically in FIG. 2. The subject invention pallets produced considerably lower temperatures 10 than the wood pallets 11, and pass the Idle Storage Test. Polyolefin pallets containing no FR package exhibit higher temperatures than do the softwood pallets, and do not pass the test. The horizontal line 12 represents the pass/fail limit.

The results indicate that the flame retardant package of the subject invention is suitable for use in pallets, where unique flame retardant properties are required. The subject invention pallet Example 1 was able to pass both Underwriters Laboratory pallet tests, while a similar pallet of the same base molding resin did not. Likewise, the Example 2 pallet shows considerable improvement over wood pallet flammability.

While embodiments of the invention have been illustrated and described, it is not intended that these embodiments illustrate and describe all possible forms of the invention. Rather, the words used in the specification are words of description rather than limitation, and it is understood that various changes may be made without departing from the spirit and scope of the invention.

* * * * *
Other References

* "Intumescents: Coating Contains Dual Components," Flame Retardancy News, vol. 11; Issue 7, Jul. 1, 2001.
* Renstrom, R., "Clean Rooms Getting Cleaner," Plastics News, vol. 13, N. 30, Sep. 24, 2001.
* "Prototype Production will Utilize Breakthrough Thermoplastic Flow Forming Technology to Achieve Superior Performance and Economic Results," Las Vegas Business Wire, Jul. 23, 2001.
* English Abstract corresponding to JP 11278485 A.
* Underwriters Laboratories, Inc. "UL 2335 Performance Testing".

We can supply any quantity and any kind of Antimony products from stock.would you please inform us how many you need and your target price, then we will confirm ASAP. We are sincerely hope to do business with you and establish long term business relationship with your respectable company.

Look forward to hearing from you soon.

Best regards,

Sam Xu
Contact me:
MSN: xubiao_1996@hotmail.com
GMAIL: samjiefu@gmail.com
SKPYE:jiefu1996

Chinese antimony market

...
read more

Wednesday, 12 September 2007

[+/-] : Additive Masterbatch Functional Concentrates

poster:jiefu Metal Supplier date: 20:26:00 0 feedback:

Say you need an additive to improve your processing conditions. JIEFU can provide slip/antiblock masterbatches, plasticizers or processing aids for film blowing, extrusion and molding. We can also supply you with a material to increase your cycle time, even in multi-cavity tools.

If you are looking to enhance the quality and strength, look and feel of your end product, our Flame retardant masterbatches,antimony trioxide masterbatches,anti-static masterbatches, anti-fogging masterbatches, UV masterbatches, heat stabilizers, FR packages, varying mineral additives, anti-oxidants, chemical couplers, optical brighteners and reflectants are what you want.

All of these additive masterbatches are available in different resin types and with variable active ingredient loadings that can be specially developed for use at a suggested addition rate. At your request, JIEFU can also manufacture tailor-made additives for your particular industry. Simply tell us what properties your finished goods need to exhibit and our technical specialists can do the rest! Choose from the following possibilities:

Functions: Flame retardant, Antioxidants, Slip Agents, Impact Modifiers, Antiwarp Concentrates, Nucleating Agents, Scratch Resistance, Blowing Agents, UV Stabilizers--HALS and UV Screens.

Resins: Polycarbonate, Nylon, Acetal, Polypropylene (Homopolymer, Clarified, Copolymer), ABS (Acrylonitrile, Butadiene, Styrene), SAN, PVC (Rigid, Plasticized), Polyethylene (HDPE, LLDPE, LDPE), Polystyrene (GPPS, MIPS, HIPS), TPE/TPO, Polyurethane

Brand Name Component
FR-M001 Decabromodiphenyl Ethane + Antimony Trioxide = masterbatches
FR-M002 Antimony Trioxide masterbatches EVA80.EAV90;PE80,PE90,PVC85,PP80ETC…
FR-M003 Magnesium hydroxide Masterbatch PE80,90,EVA89,90,PVC80,90…ETC
FR-M004 Decabromodiphenyl Oxide + Antimony Trioxide = masterbatches
FR-M005 Decabromodiphenyl Oxide
Brominated Polystyrene

We can supply any quantity and any kind of Antimony products from stock.would you please inform us how many you need and your target price, then we will confirm ASAP. We are sincerely hope to do business with you and establish long term business relationship with your respectable company.

Look forward to hearing from you soon.

Best regards,

Sam Xu
Contact me:
MSN: xubiao_1996@hotmail.com
GMAIL: samjiefu@gmail.com
SKPYE:jiefu1996

Chinese antimony market

...
read more

[+/-] : Anti-bacterial masterbatches

poster:jiefu Metal Supplier date: 19:40:00 0 feedback:

[+/-] : Transparent Filler Masterbatch

poster:jiefu Metal Supplier date: 19:33:00 1 feedback:

I. Main Application Transparent Filler Masterbatch is a kind of advanced modified Filler MB made of inorganic transparent powder material and other special additives. Its refraction is similar to polyolefin plastics. When the application ratio is around 5-10%, the transparency of HDPE film is distinctly improved. And it will not affect the transparency of LDPE film. It is used for first and mid grade polyolefin material in the process of extrusion, injection, plastic blowing, film blowing, casting, wire drawing, etc. When it is put into use, we can reduce material cost, and improve the character of final products.

II. Technique Index
1. Granule size for inorganic transparent powder: ≤10μm
2. Whiteness : ≥98%
3. Application ratio: Mix transparent filler MB with the stuff resin from the ratio of 8% to over than 15% (different ratio decided by the product and user).

III. Product Characteristics
Compare to normal filler MB, transparent filler MB is with below superiority:
1. With small gravity, it will remain parts of the physical and mechanical property of plastic products.
2. Transparent Filler MB is with good dispersing quality to assure the smooth appearance of plastic products, so that it can guarantee good printing quality of surface for first and mid grade plastic products.
3. Transparent filler MB is with good heating seal property and certain anti-adhesive property.
4. Since the transparent powder material is introduced, under same application ratio to normal filler MB, the effect on transparency of material is distinctly reduced.

IV. Remarks
Stored in ventilated, dry and cool place. Transparent Filler MB is easily to absorb moisture from the air. So please use out soon after opening the package.

We can supply any quantity and any kind of Antimony products from stock.would you please inform us how many you need and your target price, then we will confirm ASAP. We are sincerely hope to do business with you and establish long term business relationship with your respectable company.

Look forward to hearing from you soon.

Best regards,

Sam Xu
Contact me:
MSN: xubiao_1996@hotmail.com
GMAIL: samjiefu@gmail.com
SKPYE:jiefu1996

Chinese antimony market

...
read more

[+/-] : Calcium Carbonate masterbatches

poster:jiefu Metal Supplier date: 19:32:00 0 feedback:

Thursday, 23 August 2007

[+/-] : Polyamide masterbatches

poster:jiefu Metal Supplier date: 19:24:00 1 feedback:

Masterbatches useful for lightweight polyamide molding or extrusion comprise polyamide, a pore-forming agent and a fusible binder that is compatible with the polyamide. Admixture of the masterbatch and granular polyamide polymer results in a polyamide composition which can be molded or extruded into a product having increased homogeneity and expansion uniformity

1. Field of the Invention

The present invention relates to a polyamide composition useful in the production of lightweight shaped articles. In another aspect, this invention relates to a polyamide composition which contains a pore-forming agent. This invention also relates to a process for preparing the subject polyamide composition. In yet another aspect, the invention relates to a shaped article made from a modified polyamide, such modification comprising the incorporation therein of a minor amount of a masterbatch polyamide composition containing a conventional pore-forming agent.

2. Description of the Prior Art

The U.S. Pat. No. 4,076,667, assigned to the assignee hereof, discloses granules comprising a polycondensate in powder form, a fusible binder having a melting point of 70.degree.-100.degree. C. and which is compatible with the polycondensate and a dyestuff or compound capable of modifying the polycondensate to be shaped. The problems faced when attempting to modify the structure of a polycondensate, in particular, a polyamide, by adding, specifically, a pore-forming agent, however, have still not been addressed and resolved by the prior art. Problems still arise in terms of the incorporation of the pore-forming agent in a manner which results in uniform distribution and, hence, uniform expansion of the product. Several tecnhiques can be employed, each of which exhibits marked disadvantages.

One technique involves preparing a composition in a slow mixer and then granulating the resulting mixture. In this case, it is necessary to use a pore-forming or blowing agent which has a decomposition point higher than the temperature required for granulating the polycondensate. The choice of a suitable pore-forming agent, therefore, is very restricted.

It is also possible to prepare a simple mixture of powdered pore-forming agent and polycondensate by various known means. The very small amount of pore-forming agent, and also its structure, inevitably lead to a poor distribution of the pore-forming agent which manifests itself in the non-uniformity of the product's structure. This non-uniformity is evident, whether within a simple product shaped article or between or among the different shaped articles resulting from a mass production operation.

SUMMARY OF THE INVENTION

Accordingly, it is a primary object of this invention to provide a method for incorporating a pore-forming or blowing agent into a polycondensate, e.g., a polyamide, in order that the final product exhibits increased homogenity and expansion uniformity.

Another object of this invention is to provide a masterbatch composition which can be mixed with a polyamide to form a mixture useful for molding or extruding.

Another object of this invention is to provide shaped articles fabricated from polyamides which contain a pore-forming agent and which are uniform in structure.

Other objects, features and advantages will become apparent to those skilled in the art upon a study of this disclosure and the appended claims.

It has now surprisingly been found that particularly valuable results are obtained by preparing a masterbatch, preferably in the form of granules, which can be mixed before processing with a polyamide to be molded or extruded. The masterbatch composition comprises polyamide, a pore-forming agent, and a fusible binder which is compatible with the polyamide.

In a specific, preferred embodiment, the masterbatch composition comprises at least 40% by weight of the polyamide to be shaped, i.e., molded or extruded, up to 50% by weight of a pore-forming agent and from 10 to 20% by weight of a fusible binder compatible with the polyamide and having a melting point between 70.degree. to 100.degree. C.

DETAILED DESCRIPTION OF THE INVENTION

More particularly, the present invention relates to all thermoplastic polyamides ("nylons") which can be converted or shaped by molding or extrusion and which are obtained by the polycondensation of diacids and diamines, by the homopolycondensation of aminoacids, or also by the polymerization of lactams, e.g., polyhexamethylene adipamide, polycaprolactam, polyhexamethylene sebacamide, polyundecanamide, polylauryllactam, polyhexamethylene azelamide and polyhexamethylene dodecanediamide. Copolyamides and polyamide mixtures are also suitable for the purposes of this invention. For reasons of homogeneity, the same polyamide is generally used in the preparation of the masterbatch as that used in the overall composition destined to the shaping operation.

The masterbatch can be advantageously utilized in proportions in the range of about 0.05 to about 5% by weight relative to the final composition. This proportion is not critical, however, as this proportion can be exceeded without detracting from the invention.

The pore-forming agents suitable for this invention can be any of the organic compounds commonly used as pore-forming agents which have a decomposition point above 100.degree. C. These compounds are described, inter alia, in Encyclopedia of Polymer Science and Technology, Volume 2, pages 535 to 560, published by Interscience Publishers, and hereby expressly incorporated by reference and relied upon.

Any suitable binder can be employed in this invention, however, it is preferred that the fusible binder be a polymeric binder of the polyester type and that the binder have a low melting point, e.g., in the range of 70.degree.-100.degree. C. The binder can also consist of a mixture of a polymeric binder with a wax, for example, stearic acid or saponified esters of montanic acids having from 26 to 32 carbon atoms.

The preferred binder is poly(ethylene glycol) sebacate which leads to good results because it can agglomerate the granules of the masterbatch sufficiently for the masterbatch to be easy to handle without the risk of crumbling, thereby giving rise to dust. Poly(ethylene glycol) sebacate allows for ease of crumbling in an extruder, however, thereby permitting easy homogenization with granules of polyamide.

The polyamide to be mixed with the masterbatch, which is preferably in the form of granules, can contain a certain percentage of glass fibers thereby making it possible to obtain reinforced shaped articles. Proportions ranging up to 50% by weight of the polyamide are suitable. The masterbatch, itself, however, should not contain glass fibers because during the preparation of the masterbatch the glass fibers would be ground to a greater or lesser extent.

It is possible, nonetheless, to incorporate fillers or various other modifiers into the masterbatch. Similarly, the polyamide with which the masterbatch is to be mixed can also contain various modifiers or fillers.

Pigments and adjuvants which are dispersible in the mass to be compression-molded, injection-molded or extruded and preferably used as the modifiers. The modifiers are generally employed in a proportion up to 50% by weight of the total mass. For purposes of the present invention, examples of suitable adjuvants are light stabilizers or heat stabilizers, crystallizing or nucleating agents which improve the uniformity of crystallization of the polyamide employed, matting agents which are optionally surface-treated, fireproofing agents and fillers.

The masterbatch composition according to the present invention, preferably in the form of granules or pellets, is conveniently formulated via, for example, the following process:

The polyamide or polyamides to be shaped, which serve as a support for the masterbatch granules, are themselves granulated into of a more or less fine powder by any known process. The particle size is typically between 50 and 400 microns. The polyamide or mixture of polyamides, the fusible binder and the pore-forming agent, and also, if appropriate, other adjuvants such as fillers, are mixed for a sufficient period of time and at a sufficient temperature so that the temperature of the mass at the end of the operation is above the melting point of the binder. It is preferred that the components are dry mixed and densified in a turbo-mixer for a time period of about 2 to about 15 minutes, which characteristically brings the temperature of the mass at the end of the operation to above the melting point of the binder. The process can be carried out at ambient temperature with the heating due to the stirring and the friction of the powders being sufficient to raise the temperature of the mass by autogeneous heating, or, the process can be carried out hot, for example, at the melting point of the fusible binder, thereby allowing the binder to liquify and coat the mixture. The duration of the mixing depends on the heat conditions and can vary over wide limits. Generally, from 2 to 3 minutes is sufficient if the process is carried out hot and up to about 15 minutes if the temperature increase is produced by the heat generated during the formulation procedure.

This densification operation makes it possible to impart a certain cohesion to the powders introduced by virtue of the presence of the fusible agent. The fusible binder can be used in a proportion of 10 to about 20% by weight relative to the whole of the masterbatch; 20% by weight can be exceeded but a complete agglomeration of the mixture is unlikely to take place. Amounts smaller than 10% can also be employed; however, it has been found that the best results are obtained by using from about 10 to about 20% of the binder.

Various types of commercial turbo-mixers can be used, for example, turbo-mixers of the Henschel, Diosna or Papenmeier types.

The resultant densified mixture can then be granulated or pelletized in conventional commercial granulators, for example, in a Hutt (trade-mark) type G granulator.

To granulate the masterbatch, the masterbatch composition should be introduced while hot into a granulator, e.g., at a minimum of 50.degree. C., with the granulation rollers being maintained at a temperature which is equal to or slightly above the melting point of the fusible binder.

The granules can then be left to cool at the outlet of the apparatus until they acquire a sufficient hardness to enable handling without the risk of crumbling.

The densified masterbatch product can also be pelletized hot or cold with any type of commercial pelleting machine. This also affords pellets having a sufficient hardness to be able to be handled without risk of crumbling.

The advantages of the masterbatch according to this invention are significant. The availability of a masterbatch containing a large amount of pore-forming agent in a concentrated, easy to handle form is a desideratum, indeed. The degree of expansion of the desired shaped article is easily adjusted by the amount of masterbatch incorporated into the total amount of polyamide plus masterbatch. This incorporation, which is generally carried out at the inlet of an extruder, results in a shaped product in which the uniformity of the expansion is difficult, if not impossible, to achieve with conventional mixing processes. Furthermore, the fact of having available granules of masterbatch which can easily fuse as soon as same have been introduced into the extruder also makes it possible to increase the homogeneity of the product to be molded or extruded.

In order to further illustrate the present invention and the advantages thereof, the following specific examples are given, it being understood that same are intended only as illustrative and in nowise limitative.

EXAMPLE I

1,500 g of polyhexamethylene adipamide powder having a mean particle size of 300 microns, 1,500 g of a pore-forming agent which decomposes at 230.degree.-260.degree. C. and comprises the isopropyl ester of azodicarboxylic acid (trade-mark GELOGEN HT 550) and 450 g of poly-(ethylene glycol) sebacate, having a melting point of about 73.degree. C., were introduced into a rapid mixer, trademark HENSCHEL, having a capacity of 6 liters.

After rotating for 5 minutes at 3,000 rpm, the temperature of the powder rose to 75.degree.-80.degree. C. A densified powder was obtained which, while still hot, was granulated in a HUTT type G gear-type granulator. This afforded granules having a diameter of about 3 mm and a length of 3 to 5 mm.

The resulting granules had very good cohesion and a sufficient hardness to be utilized as charge to an extruder or an injection-molding machine in a mixture with other, preferably polyhexamethylene diamine, granules.

EXAMPLE II

The procedure of Example I was repeated, but substituting: 1,500 of powdered polyhexamethylene diamine, 750 g of the same pore-forming agent, 750 g of calcium carbonate and 450 g of the same poly(ethylene glycol)sebacate. Equivalent results were obtained from the point of view of both the operative procedure and the physical properties of the resultant granules.

EXAMPLE III

A direct mixture of powder was prepared, not following the procedure of this invention, of a composition containing: 0.5% of the pore-forming agent indicated above, 69.695% of polyhexamethylene adipamide, 29.655% of glass fiber and 0.15% of poly(ethylene glycol)sebacate. This mixture of powder, which had been well homogenized in a slow mixer, was introduced into the hopper of a single-screw transfer extruder having a screw diameter of 60 mm, a length of 120 cm and a transfer capacity of 4,000 cm.sup.3.

The various heating zones of the extruder were set at the following temperatures: 230.degree. C., 260.degree. C., 280.degree. C., 280.degree. C., 270.degree. C., 270.degree. C. and 280.degree. C. The clamping force of the mold, which mold consisted of 2 cavities, namely an upper cavity and a lower cavity, was 70 tons and the cooling time was 5 minutes. This gave moldings having a degree of expansion of about 30%. The moldings from the first eight molding operations were weighted. The following results were obtained:

TABLE I
__________________________________________________________________________
No. of
Operation
(Weight in
Grams)
1 2 3 4 5 6 7 8 Mean
__________________________________________________________________________
Molding 1
1,421
1,405
1,402
1,402
1,423
1,431
1,433
1,429
1,418
Molding 2
1,320
1,327
1,330
1,335
1,348
1,340
1,366
1,361
1,341
TOTAL:
1 + 2 2,741
2,732
2,732
2,737
2,771
2,771
2,799
2,790
2,759
__________________________________________________________________________

It was found that for each series of moldings there was a maximum deviation of 31 g, i.e., 2.2%, for molding 1, of 46 g, i.e., 3.4%, for molding 2, and of 67 g, i.e., 2.4%, for the sum of the 2 moldings corresponding to one injection-molding operation; also, there was a tendency for the weight of the moldings to increase in accordance with the order in which they were injection-molded, the lightest moldings being obtained at the beginning of the injection molding operation. This tendency could result due to a phenomenon involving separation of the powders with the finer powder i.e., the pore-forming agent, tending to decant and separate out from the homogenized mixture.

EXAMPLE IV

A masterbatch was prepared as indicated in Example I, with 1.15% by weight of this masterbatch being mixed with 99.85% by weight of polyhexamethylene diamine granules which contained 30% by weight of fiber as a filler. The final composition was, therefore, the same as that in Example 3.

Moldings were prepared as indicated in Example 3 and the moldings from the first eight molding operations were weighed; the following results were obtained:

TABLE II
__________________________________________________________________________
No. of
Operation
(Weight in
Grams)
1 2 3 4 5 6 7 8 Mean
__________________________________________________________________________
Molding 1
1,400
1,380
1,385
1,392
1,401
1,387
1,402
1,390
1,392
Molding 2
1,290
1,300
1,300
1,292
1,288
1,295
1,287
1,293
1,293
TOTAL:
1 + 2 2,690
2,680
2,685
2,684
2,689
2,682
2,689
2,683
2,685
__________________________________________________________________________

It was found that for each series of moldings there was a maximum deviation of 22 g, i.e., 1.56% for molding 1; of 13 g, i.e., 1%, for molding 2; and of 10 g, i.e., 0.37% for the sum of the 2 moldings corresponding to one injection-molding operation; also, there was an absence of drift in either direction in the weight from each injection-molding operation. Thus, a greatly improved uniformity (about 6 times better) was obtained as compared with the conventional technique described in Example 3, i.e., 0.37% instead of 2.4% deviation.

While the invention has been described in terms of various preferred embodiments, the skilled artisan will appreciate that various modifications, substitutions, omissions, and changes may be made without departing from the spirit thereof. Accordingly, it is intended that the scope of the present invention be limited solely by the scope of the following claims

We can supply any quantity and any kind of Antimony products from stock.would you please inform us how many you need and your target price, then we will confirm ASAP. We are sincerely hope to do business with you and establish long term business relationship with your respectable company.

Look forward to hearing from you soon.

Best regards,

Sam Xu
Contact me:
MSN: xubiao_1996@hotmail.com
GMAIL: samjiefu@gmail.com
SKPYE:jiefu1996

Chinese antimony market

...
read more

Monday, 23 July 2007

[+/-] : Hunnan Nonferrous raises $154.81 mln from share placement

poster:jiefu Metal Supplier date: 22:49:00 0 feedback:

Sunday, 15 July 2007

[+/-] : Environmental control has no effect on European antimony market

poster:jiefu Metal Supplier date: 05:14:00 0 feedback:

Wednesday, 11 July 2007

[+/-] : Flame-retarded ABS formulations with high impact strength

poster:jiefu Metal Supplier date: 23:39:00 4 feedback:

This invention is in the field of thermoplastic synthetic resin formulations, especially ABS (acrylonitrile-butadiene-styrene) resins flame retarded with at least one brominated organic flame retardant, as well as a method for producing the formulations.

BACKGROUND

ABS resins are well known in the synthetic organic polymer art as a class of thermoplastics which offers excellent mechanical properties as well as good processability and chemical resistance. The general characteristics of ABS resins are described, for example, in "Modern Plastics Encyclopedia," McGraw-Hill, New York, N.Y., 1990, pp 90-91. ABS resins are co- or terpolymers which generally comprise a rigid styrene/acrylonitrile continuous phase in combination with a polybutadiene elastomer disperse phase. A graft copolymer in which small amounts of styrene and acrylonitrile are grafted onto butadiene chains may also be present to bridge the rigid phase and the elastomer phase and make them more compatible.

For purposes of the instant invention, an ABS resin is a thermoplastic, the chemical structure of which includes each of the following structural units, however combined: ##STR1## Further, a formulated ABS resin, for all purposes herein, comprises at least about 50 wt % ABS resin. The remainder of the formulated ABS resin comprises various monomeric or polymeric additives which modify the properties of the ABS resin. These additives include, for example, various impact modifiers, stabilizers, processing aids, pigments, flame retardants, synergists, etc. They can be incorporated into the ABS resin in various ways.

Incorporation of the various additives is not a trivial matter, and the properties of the formulated ABS resin can be affected by the manner in which it is done. When the additives are solids, dry-blending can be employed. For example, the solids can be mixed and heated to soften and homogenize the mass, which can then be sheeted, chopped, and pelletized.

A flame retardant, such as a halogenated organic compound, is often incorporated into a formulated ABS resin so as to constitute as much as about 25-30 wt % of the formulation. Such incorporation can adversely affect the properties, other than the flammability, of the formulated ABS resin.

SUMMARY OF THE INVENTION

Consequently, it is one object of this invention to provide a formulated ABS resin in which a halogenated organic flame retardant is incorporated and an impact modifying polymer is added so as to provide a significant net increase in the impact strength of the formulation. It is another objective to build on this improvement by providing a method for incorporating the flame retardant which leads to a still further increase in the impact strength.

In attaining the aforesaid objectives, this invention provides a flame retarded ABS formulation which comprises at least about 50 wt % ABS resin, about 5-30 wt % halogenated flame retardant, about 0-6 wt % flame retardant synergist, and about 8-38 wt % polymeric impact modifier. In preferred embodiments, the polymeric impact modifier is selected, and the flame retardant is incorporated in such a way that the Izod impact strength is dramatically increased.

DETAILED DESCRIPTION

The ABS resin component of the formulated ABS can be selected from the many resins available in commerce. Such resins include GE Cycolac.RTM. resins, Monsanto Lustran.RTM. resins, and Dow Magnum.RTM. resins, for example. The ABS resin component of the formulated ABS resin of this invention comprises at least about 50 wt % of the formulation, and the ABS resin can comprise as much as about 70 wt % of the formulation.

One of the additives which will be present in the formulated ABS resin of this invention is one or more flame retardants, and halogenated flame retardants have been recommended and employed in that application. Halogenated flame retardants especially useful in the practice of this invention are selected from the group consisting of tetrahalobisphenol A, N,N'-bis(tetrahalophthalimide), ethylenebis(tetrahalophthalimide), halogenated polystyrene, and pentahalobenzyl acrylate, in all of which halo is selected from chloro and bromo, and also bis-halophenyl compounds represented by the following structural formula which are solids at ambient temperature: ##STR2## in which formula each X is selected independently from chlorine and bromine; m and n can be the same or different and can range from 1 to 5; Y is selected from oxygen, alkylene, --NR--(where R is selected from hydrogen and hydrocarbyl), alkylenedioxy, aryldioxy, and a chemical bond. Alkylene is preferably lower alkylene, i.e., straight chain or branched C.sub.1 -C.sub.6, such as methylene, ethylene, isopropylene, butylene, t-butylene, and the like, methylene or ethylene being preferred. Hydrocarbyl includes alkylene, especially lower alkylene, but also unsaturated alkylene and aromatic groups such as phenyl and alkylphenyl or halophenyl. Alkylenedioxy includes methylenedioxy, 1,2-dioxyethylene, and the like, while aryldioxy includes dioxyphenyl, for example. In the preferred flame retardants halo and X are bromo. Among the aforesaid flame retardants, the bishalophenyl compounds are preferred, and among these compounds, decabromodiphenyl oxide, decabromodiphenyl ethane, 1,2-bis(tribromophenoxy)ethane, and decabromodiphenyl amine are especially attractive.

In addition to one or more halogenated flame retardants, the formulated ABS resin of this invention optionally includes a flame retardant synergist in an amount ranging from about 2 to about 6 wt %. A number of materials, such as metal oxides, e.g., iron oxide, tin oxide, zinc oxide, aluminum trioxide, alumina, antimony tri- and pentoxide, and boron compounds, e.g., zinc borate; also antimony silicates and ferrocene, are known to enhance the effectiveness of flame retardants, especially halogenated flame retardants. A particularly effective and preferred synergist is antimony trioxide.

In addition to flame retardant, the formulated ABS resin of this invention includes one or more polymeric impact modifiers. It is well known that the addition of certain materials to an ABS resin tends to toughen articles molded therefrom. Among these materials are styrene/butadiene/styrene triblock copolymer, styrene/isoprene/styrene triblock copolymer, styrene/butadiene diblock copolymer, polycaprolactone, functionalized ethylene/propylene copolymers, and poly(haloolefins). A preferred impact modifying material is a halogenated polyolefin resin, such as chlorinated polyethylene. A typical formulated ABS resin containing chlorinated polyethylene and a brominated flame retardant, in addition to the ABS resin, is described in Example 1.

EXAMPLE 1

A. The components indicated in column A, Table 1 were dry-blended by shaking them together for 2 min in a plastic bag. The mixture was then extruded on a Haake-Buchler System 40 Rheometer equipped with a twin-screw extruder head. The extrusion was carried out at 210.degree.-210.degree.-220.degree.-220.degree. C. and 60 rpm. The extruded material was pelletized and dried at 88.degree. C. for 4 hr before injection molding it on a Battenfeld BSKM 100/40 machine at 195.degree. C.

B. The components indicated in column B, Table 1 were combined as follows: The flame retardant, chlorinated polyethylene, processing aid, and one-half the stabilizer were blended in a Brabender mixer at 175.degree. C. and 66 rpm for 2 min. The resultant blend was sheeted on a two-roll mill and chopped into small pieces on a Glouster grinder, affording a masterbatch. An amount of the masterblend appropriate to the desired composition was dry-blended with the remaining ingredients. The combination was then extruded, pelletized, dried, and molded as described in A above. The IZOD impact strength of the extruded materials was measured on 1/8 in. test bars according to the ASTM D256 test method.

TABLE 1
______________________________________
Component A (wt %) B (wt %)
______________________________________
ABS Resin (Dow 69.9 68.9
Magnum .RTM. PG-914)
Impact Modifier; 13.1 13.1.sup.a
Polychloroethylene
(Tyrin .RTM. 3611 of Dow
Chemical Co.)
Flame Retardant; 12.5 12.5.sup.a
Decabromodiphenyl Ethane
(Ethyl Corp.)
Synergist; Sb.sub.2 O.sub.3
4.0 4.0
Processing Aid; 0.5.sup.a
Zinc Stearate
Stabilizer; Dibutyltin
0.5 1.0.sup.a
Maleate (Thermolite .RTM.
13 of Atochem No. Am.)
IZOD Impact Strength
3.6 .+-. 0.1
3.6 .+-. 0.1
(ft-lb/in notch)
______________________________________
.sup.a component of masterbatch

The data in Example 1 show that master batching per se has little or no effect on impact strength of the resultant formulated ABS resin. The effect on IZOD impact strength of including a second impact modifying resin; more specifically, a styrene/butadiene/styrene block copolymer is set forth in Example 2.

EXAMPLE 2

A. The components indicated in column A, Table 2 were combined as explained in Example 1 A.

B. The components indicated in column B. Table 2 were combined as explained in Example 1 B.

TABLE 2
______________________________________
Component A (wt %) B (wt %)
______________________________________
ABS Resin (Dow 64.9 63.9
Magnum .RTM. PG-914)
Impact Modifier; 13.1 13.1.sup.a
Polychloroethylene
(Tyrin .RTM. 3611 of Dow
Chemical Co.)
Impact Modifier; 5.0 5.0.sup.a
Styr/But/Styr Block
Copolymer (Shell
Kraton .RTM. D1102)
Flame Retardant; 12.5 12.5.sup.a
Decabromodiphenyl Ethane
(Ethyl Corp.)
Synergist; Sb.sub.2 O.sub.3
4.0 4.0
Processing Aid; 0.5.sup.a
Zinc Stearate
Stabilizer; Dibutyltin
0.5 1.0.sup.a
Maleate (Thermolite .RTM.
13 of Atochem No. Am.)
IZOD Impact Strength
4.8 .+-. 0.2
9.0 .+-. 0.4
(ft-lb/in notch)
______________________________________
.sup.a component of masterbatch

The data in Example 2 illustrate the improvement in IZOD impact strength of the formulated ABS resin brought about by replacing some of the ABS resin with a styrene/butadiene/styrene block copolymer; i.e., an increase in the IZOD impact strength from 3.6.+-.0.1 in Ex. 1 A to 4.8.+-.0.2 ft-lb/in notch. Moreover, the data illustrate the surprising increase in IZOD impact strength which occurs when the styrene/butadiene/styrene block copolymer is part of the masterbatched ingredients; i.e., from 4.8.+-.0.2 to 9.0.+-.0.4 ft-lb/in notch.

In Example 3, the effects of removing the impact modifying resins, one at a time, from the masterbatch is illustrated.

EXAMPLE 3

In both A and B the components were combined as explained in Example 1 B.

TABLE 3
______________________________________
Component A (wt %) B (wt %)
______________________________________
ABS Resin (Dow 63.9 63.9
Magnum .RTM. PG-914)
Impact Modifier; 13.1.sup.a
13.1
Polychloroethylene
(Tyrin .RTM. 3611 of Dow
Chemical Co.)
Impact Modifier; 5.0 5.0.sup.a
Styr/But/Styr Block
Copolymer (Shell
Kraton .RTM. D1102)
Flame Retardant; 12.5.sup.a
12.5.sup.a
Decabromodiphenyl Ethane
(Ethyl Corp.)
Synergist; Sb.sub.2 O.sub.3
4.0 4.0
Processing Aid; 0.5.sup.a 0.5.sup.a
Zinc Stearate
Stabilizer; Dibutyltin
1.0.sup.a 1.0.sup.a
Maleate (Thermolite .RTM.
13 of Atochem No. Am.)
IZOD lmpact Strength
5.8 .+-. 0.2
7.6 .+-. 0.3
(ft-lb/in notch)
______________________________________
.sup.a component of masterbatch

When the components were combined without master batching, i.e., Example 2 A, the IZOD impact strength was 4.8.+-.0.2 ft-lb/in notch. Although excluding either impact modifier resin from the masterbatch affects IZOD impact strength adversely, this affect is most pronounced when the styrene/butadiene/styrene block copolymer is left out of the masterbatch.

It will be evident to those skilled in the art that considerable variation in the specific nature and relative amounts of the components of the formulated ABS resin of this invention, as well as in the manner in which those components are combined is possible within the contemplation of this invention and that the invention is limited only by reference to the following claims:

Pls let us know if you are interesting in it. with any question, ask me freely.Tks you.
Sam Xu
Sales Engineer
DONGGUAN JIEFU FLAME-RETARDED MATERIALS CO.,LTD
Contact me:
MSN: xubiao_1996@hotmail.com
GMAIL: samjiefu@gmail.com
SKPYE:jiefu1996

Chinese antimony market

DONGGUAN JIEFU FLAME-RETARDED MATERIALS CO.,LTD...
read more

Monday, 2 July 2007

[+/-] : Development of Magnesium Hydroxide Environmental Protection Materials

poster:jiefu Metal Supplier date: 21:40:00 0 feedback:

Content：
To establish an environmental protection materials factory with the annual capacity of 50 thousand tons magnesium hydroxide base taking dolomite as raw materials and develop the series products of magnesium hydroxide base. The physical method of adhesion, color, sttlement and separation is adopted to harness industrial wastewater and sewage, and chemical method to harness atmospheric pollution.The annual sales income of 85 million USD can be achieved.Cooperative form:EJV,CJV,wholly foreign-owned.

Products arrangement：

Product.The main product is magnesium hydroxide (the MgO content is 35%) and the by-product is magnesium sulfate. The new combustion-resistant material is also considered.Production scale. 100 thousand tons of magnesium hydroxide and 200 thousand tons of magnesium sulfate in the first stage and 200 thousand tons after expansion.

Construction conditions：

Investment environment. Shimen county is situated in the northwest of Hunan province, bordering Hubei province, with Zhicheng-Liuzhou Railway and Shimen-Changsha Railway running through the territory. The transportation of road and water is very convenient, accessible to all directions. Meanwhile, a series of policies for encouraging foreign investment and improving soft and hard environment have been promulgated.Sufficient energy.The first-phase engineering of Shimen Power Plant with the installed capacity of 600 thousand KW(2×300 thousand KW motor set) has been put into operation and connected to the grid. Its second phase engineering is under process. Zaoshi key water control project with the installed capacity of 140 thousand KW has been started. There are Sanjiangkou hydropower station with the installed capacity of 62.5 thousand KW and a thermal power plant with the installed capacity of 9 thousand KW. The second Shimen power plant with the installed capacity of 2.40 million KW is under construction. Shimen county is rich in coal with the annual output of 1 million tons. A modern tap water plant with the daily capacity of 60 thousand tons is available.Rich mine resources. There are over 30 kinds of proved mines worth developing. The reserves of dolomite C1 are 150 million tons with the arverage grade of MgO and TFe being 21% and less than 0.5% respectively, which is mainly distributed inBaiyun mountain and Xinguan and Xinpu townships, 5 km from the downtown of Shimen country.

　　Market analysis：

　　Magnesium hydroxide is mainly used in environmental protection materials to harness paper mill, textile and dyeing mill, mechanical factory, electroplating factory, wastewater treatment plant and sulfur dioxide in the flue, and also an additive in decoloring and combustion-resistance.

　　Environmental protection is one of our basic policies and environmental pollution is a big proliem for human being.

　　The selling price of magnesium hydroxide decoloring agent (MgO content is 35%) made in Japan is 218 USD per ton and that of prescription magnesium hydroxide (MgO content is 35%) made in USA is 1697 USD per ton. But the price of suspension magnesium hydroxide(MgO content is 35%)is only 100～103 USD per ton and the prescription one is only 788～970 USD perton.

　　Estimated investment：

　　The total investment is 20 million USD, including the fixed assets of 12 million USD and currrent assets of 8 million USD.

　　Construction environment：

　　Changde has been given the honorable titles of National Hygiene City, National Gardening City, China Excellent Tourism City, National Civilization City and National Excellent Transportation Control City by the state.Changde is in subtropical monsoon area with distinctive seasons, warm climate, plenty of sunshine and rainfall. The annual average temp is 16.5℃,the annual average rainfall is 1310 mm, the annual sunshine time is 1530-1870 hours and the frost-free period is about 270 days with the average relative humidity being 81%.Changde city has become the largest energy base in Hunan province. The average price of power for industrial use is 0.47 yuan per KWH, 0.41 yuan per KWH for keyindustry, 0.17 yuan per KWH in low peak time. Establishment of power plant is encouraged.

　　Transportation: Changde city has been listed one of 60 pivotal cities, and is the only inland city that simultaneously has railway, expressway, airport and waterway.6 expressways will meet in Changde. Changde-Changsha Expressway has been open to traffic, Changde-Zhangjiajie Expressway and Changde-Jishou Expressway are under construction. Changde-Jingzhou, Changde-Yueyang, Changde-Shaoyang Expressway will be started soon.Changde Airport can land or take off large passenger planes Boeing 737 and 757, and the flights to Beijing, Shanghai, Shenzhen and Haikou have been open.3000-tonnage ship can sail on Yuanjiang River and Lishui River yearly,where there are 36 docks including two 500-tonnage docks and one 1000-tonnage container dock in Changde Port with the annual handling capacity of over 10 million tons. It is accessible to Changsha southward, Yueyang northward, to Chongqing upward and Shanghai downward through Dongting Lake into Changjiang River on waterway with the navigation mileage being 1758 km.The distance and cost from Changde to Shanghai, Guangzhou are as follows:To Shanghai:

　　——Railway. 1377 km and 0.08 yuan per ton and km. 

　　——Highway. 1300 km and 0.25-0.30 yuan per ton-km.

　　——Waterway. 1648 km and 0.05--0.06 yuan per ton-km.

　　To Guangzhou:

　　——Railway. 923 km and 0.11 yuan per ton-km. 

　　——Highway. 980 km and 0.27-0.32 yuan per ton-km.

　　Foreign service organizations are complete, including foreign economy and trade,imp & exp. commodity inspection & quarantine, customs, foreign exchange control, export commodity through transport and foreign traders complaints center etc. Changde has economic relations with 80 countries and regions.

　　Preferential policies：

　　Providing land favorably.No administrative fees during construction period.Returning local tax to enterprise.

　　Special work team to serve free of charge and to go though all formalities on behalf.

　　No interference in production and operation by governmental agencies.Enjoying the preferential policies for hi-tech projects by the state.

　　Economic analysis：

　　After the project is completed,the annual sales income of 85 million USD,profit-tax of 25 million USD,profit of 15 million USD and the investment profit rate of75% can be achieved with the return period being 1.4 years.

　　Contact:

Sam Xu
Sales Engineer

DONGGUAN JIEFU FLAME-RETARDED MATERIALS CO.,LTD
Address: jiefu industrial park shuiping industrail district dalang town dongguan GD,P.R.C
Zip: 528770
Tel: 0086-755-83474911
FAX: 0086-755-83474980
Mobile:13929211059
Contact me: xubiao_1996@hotmail.com samjiefu@gmail.com

Jiefu Chemical industry LTD . (Our imports and exports company )

Chinese antimony market

DONGGUAN JIEFU FLAME-RETARDED MATERIALS CO.,LTD...
read more

Antimony trioxide,Flame retardant masterbatch,Additive Masterbatches

Contact me!!

Labels

One World One Dream!!Beijing 2008 Olympic Games!!

Snap Shots

Feed subscribe