Soap is a general term WSD PVC stabilizerfor a fatty acid salt

Soaps are salts of fatty acids in general. Formula RCOOM, wherein RCOO is a fatty acid radical , M is a metal ion . Fatty acid soap daily typically 10-18 carbon atoms , a metal mainly alkali metal such as PVC stabilizer sodium or potassium , and is also useful for some organic bases such as ammonia, ethanolamine , triethanolamine soap made ​​for special purposes . Broadly , grease, wax , rosin or fatty acids, fatty acid salts and alkalis from the saponification or neutralization reaction proceeds , and can be called a soap. Soap soluble in water, washing decontamination effect. There are all kinds of soap soap, also known as toilet soap, soap and composite metalPVC plasticizer soap . Other metal ( alkaline earth metal or heavy metal ) salts of fatty acids , insoluble or sparingly soluble in water , and no cleaning effects collectively referred to as metal soap as a lubricant. Complex soap is a mixture of soap and the right amount of lime soap dispersant made ​​resistant to hard water , soap scum washed, not born .

Some major effects of barium zinc PVC stabilizer

Stabilizer introduced in the benzene ring is a new attempt. Improve the

relative molecular mass of organic tin stabilizer , but also a new

research trends. Main ways : organic tin stabilizer own high molecular

weight , the formation of polymeric organic tin ; unsaturated organic tin

compounds with the appropriate monomers to improve its relative molecular

mass ; middle with bifunctional compounds and organotin organotin body

molecules to form a molecule containing a plurality of tin atoms to

improve their relative molecular mass and the like. Avoid small relative

molecular mass and volatile due to become odorless "clean " type organotin

stabilizers . Their constituents , except barium soap , zinc soap , there

phosphites and coloring preventing agent. The new  high performance

phosphite emerging, prompted the rapid development WSD PVC flame retardant  of such stabilizers .

Especially in recent years β- diketones as preventing the use of initial

coloring agent to make the performance of barium zinc stabilizer class

more perfect. The main advantages : superior weatherability barium -

cadmium stabilizers; improved cold can reduce the amount of phosphate type

auxiliary plasticizer .
Barium zinc stabilizer is mainly used for rolling and plasticized PVC

plastisol processing , but also from the product into powder and liquid

form . Can be compared with liquid barium cadmium stabilizers thermal

stability of liquid barium zinc stabilizer compatibility with commonly

used plasticizer in PVC as well as a stable and WSD zinc stearate  transparent terms . Also

recently appeared on the market a new barium zinc products , the product

tasteless, non fouling phenomena in the processing of the plasticized PVC

, and exhibits excellent self- lubricating effect . Barium zinc stabilizer

slightly inferior in light stability , can be compensated with an epoxy

plasticizer and an ultraviolet absorber. Also WSD Polyethylene wax  barium metal, although a

very small solubility in water , but if access to the gastrointestinal

tract , the stomach acid to increase its solubility, greater toxicity, and

therefore is limited in recent years in many applications.

Some simple exposition Heat stabilizer for

Environmental problems due to the toxicity of lead and, in the most common case of a zinc, barium and calcium-zinc stabilizers are quickly replaced by a more efficient formulation of barium-lead. Lead systems can be provided close to the processing stability of the novel stabilizer is continuously developed in order to achieve lead-free stabilizer. This occurs due to government regulations and the high cost of waste disposal.
A combination of zinc and secondary phosphite stabilizer components with food grade calcium in the food packaging film has been applied aspects.
Most plasticizers used in soft products, the plasticizer-containing epoxy esters, such as diglycidyl ester, epoxy fatty acid ester. Reacting the epoxide with hydrogen chloride as an auxiliary stabilizer.
Because of the unique electrical properties of the lead compound, in the wire and cable coating dominate the market, some of the metal in the coating mix applied as an auxiliary stabilizer.
Hard products: rigid PVC products in the North American market, although there are some wrong, mixed metal, antimony esters using flow-based, but most are using stabilizers containing tin. In other parts of the world, especially when used as a profile, is gradually replacing lead stabilizers barium a stabilizer, which is due to the problems discussed above pan. However, due to the potential environmental factors in these applications CKS gradually calcium-zinc and organic tin instead of lead.
Pipe: PVC rigid PVC pipe is unique to the largest market, the majority of the pipe is in the twin-screw extruder processing. Since the heating time is short, and therefore the use of lower concentrations of organotin stabilizers stream. These pipe grade tin content of the stabilizer may use to 4-10% less, per 100 parts of the polymer is generally 0.4 parts (twin screw extrusion), while the single screw extruder 0.6-1 .0 copies. Stabilizer for drinking water pipes must comply with the requirements of independent certification bodies.
Injection: With the emergence reciprocating screw injection molding resins suitable for the requirements, and has successfully developed a highly efficient stabilizers and obtained a very large WSD Chrolinated polyethylene  part (35 pounds).
While the lower molecular weight resin is more easily processed, but the high shear injection mold typically require a 25% containing 14% tin organotin ester stream.
Blow molding: the proper selection of the organic tin blow molding is critical because there is a starting color, fragrance, transparency additional requirements play a decisive role in the generic article are sulfuric acid ester and dibutyltin tin methyl ester. Although the methyl esters of tin and tin have FDA permission, but the main use of food-grade applications octyl tin.
Membrane and sheet: extrusion and calendering are used to process rigid PVC sheet and membrane, the membrane and the WSD Titanium dioxide rutile  sheet is typically used as stabilizers for use with bottles.
Siding and outer profiles: For stabilizers for PVC siding and window frame materials, weather resistance and durability to maintain color of the additional requirements. Long term studies have determined the structure of these organotin optimal use.
In North America, the single / double sulfates are present preferred organotin stabilizers have been traditionally used in the European metal mixture also increases its appeal.
In North America, the high amount of titania used WSD Aluminum hydroxide  well to prevent ultraviolet. This fact coupled with higher productivity are required to provide more organotin excellent processing stability.

Some of the major purposes of Heat stabilizer

1, Ca-Zn composite heat stabilizer non-toxic, non-harmful heavy metals, can replace traditional lead salt heat stabilizer, safety and health, conducive to environmental protection;
2, has excellent thermal stability and excellent weather resistance, good initial color, light, anti-sulfide contamination, can WSD Metallic stearate  significantly improve the outdoor use of PVC products;
3, calcium, zinc and PVC heat stabilizer dispersion, compatibility, anti-precipitated, forming a good processing stability, has a wide processing characteristics can be improved extrusion speed and extend the production cycle;
4, has a unique role in coupling, giving a good filler dispersion, promote and package resin, improve product performance, both toughened and promote melting, can significantly improve the mechanical properties of PVC products, enhanced products compressive blasting Performance. 1) Heat stabilizer salt: salt stabilizer is the combination of the "base" of lead salts of inorganic and organic acids, such stabilizer having excellent heat resistance, weather resistance and electrical insulating properties, low cost transparency is poor, there is a certain toxicity, dosage is generally 0.5% to 5.0%. 2) a fatty acid-based heat stabilizer: Such a thermal stabilizer is a compound consisting of a fatty acid with a metal ion root, also known as hot metal soap stabilizers, its performance and the kind of metal ions and acid WSD chromium oxide  radicals, generally in an amount of 0.1% ~ 3.0%. 3) organotin heat stabilizers: class PVC heat stabilizer molecule with chlorine atoms to form unstable ligand and the ligand organotin carboxylate group and a chlorine atom unstable replacement. Features such heat stabilizers are high stability, good transparency, heat resistance, the downside is expensive. Ca-Zn composite heat stabilizer in an efficient, high environmental protection is known, no smell, dispersion, mobility, stability, weather resistance, excellent transparency. At present, both plates, areas of production and processing profiles or plastics, composite stabilizer have become integral. When adding calcium zinc composite heat stabilizer, you first need to consider compatibility with the polymer is added between. If you add a composite stabilizer and polymer compounds produce a certain reaction, eroding the additive effect but will be counterproductive. Compatibility between various plastics additives is also important, not simply add a stabilizer during plastic processing, will add time to pay attention to the role of auxiliaries and additives occur between each other. Different plastics composite stabilizer for added performance, odor, stability, thermal properties and other characteristics different  WSD Polyethylene wax requirements, in operation to do to analyze specific issues, select the appropriate composite stabilizer. Also note that when you add another calcium zinc composite heat stabilizer moderation, too much or too little will not achieve the intended stabilizing effect.

hard polyvinyl chloride (UPVC) of the injection molding process some of the detailed analysis

UPVC known as hard PVC, vinyl chloride monomer which is formed by the polymerization reaction of amorphous thermoplastic resin and certain additives (such as stabilizers, lubricants, fillers, etc.). pvc called hard pvc, vinyl chloride monomer which is formed by the polymerization reaction of amorphous thermoplastic resin and PVC stabilizer for cable  certain additives (eg stabilizers, lubricants, fillers, etc.). In addition to the additive, but also other resins used for blending with the modified approach
upvc called hard pvc, vinyl chloride monomer which is formed by the polymerization reaction of amorphous thermoplastic resin and certain additives (such as stabilizers, lubricants, fillers, etc.).
In addition to the additive, but also other resins used for blending with the modified approach, it has obvious practical value. These resins are cpvc, pe, abs, eva, mbs like.
upvc high melt viscosity, poor mobility, even when the injection pressure and melt temperature fluidity will not change much. In addition, the resin molding temperature and thermal decomposition temperature are very close to the temperature for forming a very narrow range, is a hard molded material.
1, plastic processing
After 24 hours at room temperature, water less than 0.02%, and therefore without drying. If must be dry, can be placed in 60-70 ℃ hot air oven for 3 hours or 80 ℃ 1-1.5 hours in a dryer.
Up to 20% recycled material and new material mixed, the amount of recycled material depends on the end use of the product. Abuse of recycled material injection can fail, not only the composition of recovered much more is due to the material after repeated re-processing. Every once more recycled material decline in the quality recycling more.
2, injection molding machine selection
upvc Since the melt viscosity, easy PVC heat stabilizer for fittings  to decompose, decomposition products have a corrosive effect on iron, which must be dedicated to the plastics injection molding components and temperature control system.
Ramada products covered in each of the clamping force model, has specialized upvc plastics injection system, and with upvc pipe fittings Pulling requirements with a dedicated security gate devices. Under normal circumstances as long as the injection volume to meet the weight requirements, the choice of this series of injection molding device can be molded upvc high-quality products.
3, mold and gate design
Mold temperature can be set to 40 ℃. Flow channel length should be short, will have a large diameter to reduce the pressure loss and the holding pressure can be passed into the mold cavity. Gate as short as possible, cutting surface to be circular, the diameter of the smallest nozzle orifice 6mm,, into a conical angles to 5 °.
Sprue cutting surfaces have circular, with a combination of cold slug well by connecting section sprue and gate radius, diameter of 7mm.
Gate application tangentially connecting radius of the surface shape plastic parts, the shorter the better, cutting surface to be smooth.
Cold slug well to prevent semi-solidified material into the mold cavity, its importance is often overlooked.
Position of the gate to the right, so that the material in the stream flowing smoothly trail, will not stay in sharp corners, debris and metal traces in order to avoid compression or decompression situation, should maintain smooth flow smoothly.
Application of stainless steel casting mold, chromium content of at least 13%, preferably 16%, at least 55 Rockwell hardness, hard chrome-plated steel mold can be processed to form a protective effect.
After production, the application of a mild lye carefully cleaned and then sprayed mold surface quality oil spray or siliceous spray.
4, the melt temperature
Measure of available air-launched by 185-205 ℃ range. Smoothness of the material from the injection can know the exact upvc melt temperature. If the material in the injection after the rough, as evidenced by the material is not homogeneous (plastics insufficient), which means that the temperature set too low; eg, injection newcomer bubble and smoke  low molecular polyethylene a lot of smoke, it means the temperature is too high.
5, the injection speed
Slower rate of fire, or cause excessive shear degradation of materials, the use of upvc produce extremely smooth, thick-walled products should be used multi-stage injection mold filling speed.
6, the screw speed
Should match the molding cycle may be. Screw face velocity shall not exceed 0.15-0.2m / s
7, the back pressure
Up to 150bar, the lower the better, common to 5bar.
8, the retention time
At a temperature of 200 ℃, barrel residence time can not exceed five minutes. When the temperature is 210 ℃, cylinder residence time should not exceed 3 minutes.

processing aids in the characteristics of different processing methods

Processing aids action principle : PVC melt poor scalability , easily lead to melt broken ; PVC melt relaxation is slow, easily lead to the product surface rough, dull and shark skin and  titanium dioxide anatase so on. Therefore , PVC processing often necessary to add processing aids to improve the melt of the above-mentioned drawbacks . Processing aids as a class can improve the performance of resin processing aids, which consists of three main modes of action : promoting resin melt , the melt rheology modifiers and gives lubrication. 1 PVC resin promoting resin is melted when heated under shear force , processing modifier first melted and adhered to the surface of the PVC resin particles , based on their compatibility with the magnesium hydroxide flame retardant  resin and the molecular weight, the viscosity of PVC and friction increases, thereby effectively the shear stress and heat transfer to the PVC resin, PVC accelerate melting . (2) has a melt rheology modified PVC melt strength is poor, poor scalability and melt fracture and other shortcomings, while processing modifier can improve the melt above problems. Its mechanism of action is: to increase the melt viscoelasticity of PVC , thereby improving the die swell and increased melt strength. 3 gives lubricity compatibility with PVC processing modifier part first melting molten play a catalytic role ; partly incompatible with PVC molten resin to migrate outside the system , thereby improving mold release . ACR processing aids commonly used species category , ACR is methyl methacrylate . PVC can be  plastic additive added to improve the melt strength and melt elongation . ACR-201 is mainly used for rigid PVC profiles , pipes, bottles and sheets, the amount of 0.5 to 2 parts . ACR-401, methyl methacrylate , ethyl acrylate , butyl acrylate and styrene monomer from four kinds , are core - shell copolymers , AMS class , AMS -based oligomeric α- methyl styrene material , which is also called hexamer M-80, it is non-toxic and transparency , and can improve the processability of PVC resistance and luster of products . AMS for rigid PVC , the hard tube add 2 to 5 parts , 3 parts of a transparent film , was added 10 parts of the floor . Copolymers of butadiene and acrylonitrile P83 , the surface treatment by the PVC latex , can be used as processing aids, added in an amount up to about 20 parts . 820-G is a chlorinated paraffin and polypropylene oxide - ethylene made ​​by free radical grafting , which can improve the processability of PVC , gloss and feel, added in an amount up to 5 to 10 parts .

Fluorescent Brightener some of the major role

I: Fluorescent Brightener BC: Appearance light yellow powder. This product is mainly used for cotton , rayon , rayon and pulp and other neutral dye bath whitening treatment .
Two : Fluorescent brightener JD-3: Appearance light yellow powder , soluble in hot water. This product is in neutral tin stabilizer  or slightly alkaline conditions, for synthetic detergent , soap , paper and textiles whitening.
Three : Fluorescent brightener advance 31 #: Appearance light yellow powder , the product is mainly used for synthetic detergent , soap , soap , paper whitening , also used cotton fabric , nylon , rayon and other whitening can be whitening substance that is added Baifa Liang . IV: Fluorescent Brightener Dioctyl phthalate  BR ( Brightener BL): sodium salt composition of DSD phenylisocyanate condensates , the appearance of a pale yellow powder , an anionic , microstrip red purple. 2% solution clarified , more than 95% through a 60 mesh sieve. Five: Fluorescent Brightener EBF Composition: This product is mainly used for polyester, nylon and acetate fiber whitening can  liquid stabilizer also be used for synthetic fiber and cotton, wool blended fabric whitening . Six : Fluorescent brightener R: DSD sodium salt composition of phenyl isocyanate condensates , the appearance is white to pale yellow powder. This product is mainly used as a synthetic brighteners .
Eight : Fluorescent Brightener ER ( brightener PS-1): This product is used for polyester, polyester / cotton blended fabric whitening . Treated fabric with its whiteness, shade net . Has excellent washability , light fastness and resistance to sublimation .

PVC with a metal soap stabilizers which

Metal soap as a stabilizer , mainly for the plastics industry , particularly PVC use more. Stabilizers for PVC , mostly cadmium, barium, calcium, zinc , aluminum, magnesium salts of higher fatty Diethylene glycol dibenzoate  acids , especially stearic acid and lauric acid salts. They play the role of hydrogen chloride acceptor , a carboxyl group and a metal soap PVC replacement reaction of the chlorine atoms , the esterification of PVC stabilized. In most cases, the esterification reaction rate ZnCdPdCaBa. Because cadmium toxicity, have now banned . Zinc soap is best complementary stabilizer, but long-term stability is poor , the price cheaper , non-toxic , can be used in food packaging films . Common Ownership zinc stearate , zinc laurate , ... PVC heat stabilizers generally based on processing tribasic lead sulfate ( three salt ) , dibasic lead stearate ( two salt ) -based, then add  aluminum hydroxide a small amount of lead stearate ( hard lead ) and calcium stearate ( hard calcium ) , may be used alone , can be reasonable, made ​​of composite lead salt stabilizer. The toxicity of lead cause for great concern , three salt , two lead salt stabilizer higher indifferent people , and thus the metal soap -based heat stabilizer ( particularly a lead-free metal soap ) for people concerned , the thermal stability of the metal soap mechanism has become a hot topic. Because PVC heat stabilizers in the production aspect is protected by patents , so there is no reported its exact composition and potassium soap  content . Commercial heat stabilizers are commercially available mixture of various compounds . Mixture is better than pure substances stabilizing effect . Meanwhile , in dealing PVC heat stabilizers are required to carefully consider its toxicity. PVC, processors and consumers should pay attention to warnings about the toxicity of stabilizer .

heat stabilizers, introduced species and their uses

PVC plastic profiles recipes, heat stabilizers, introduced species and their uses
PVC plastic profiles design principles formulation Formulation PVC plastic profiles mainly composed of PVC resin and additives, wherein the additives according to the functions are one pack stabilizer  divided into: a heat stabilizer,
Lubrication agents, processing modifier, impact modifiers, fillers, anti-aging agents, coloring agents. Before the design PVC formulation
Should first understand the PVC resin and various additives performance.
Raw materials and additives
PVC resin
Below the surface rule, solid, table tennis was like, easy to absorb plasticizers, loose type currently used more.
PVC can be divided into ordinary level (toxic PVC) and sanitary '(non-toxic PVC). Sanitary requirements of vinyl chloride (VC) content is low
At lOXl0-6, can be used for food and medicine. Synthesis process is different, PVC can be divided into suspension PVC and emulsion PVC. Root
According to the national standard GB/T5761-93 "general purpose PVC resin suspension test" provisions into suspension PVC
PVC-SGl to PVC-SG8Jk resins, wherein the smaller the number, the greater the degree of polymerization, the greater the molecular weight, the higher the strength, but
Melt flow more difficult, the processing is more difficult. Specific choice when doing soft products, the general use of PVC-SGl, PVC-SG2
PVC-SG3-type, who need to add a lot of plasticizer. Such as polyvinyl chloride resin film for SG-2, 50 to 80 parts of plasticizer
Agent. The machining of hard products, generally without adding a plasticizer or a very small amount, so use PVC-SG4, VC-SG5, PVC-SG6PVC-SG7, PVC-SG8 type. Such as rigid PVC pipes with SG-4 resin, plastic window profiles using the SG-5 resin, rigid transparent
Next sink using SG-6 resin, rigid foam profile with SG-7, SG-8 resin. And Emulsion PVC paste mainly used for artificial leather,
Wallpaper and floor covering and dipped plastic products. Some manufacturers factory PVC resin PVC resin by plastic lubricant  polymerization degree (degree of polymerization unit chain
The number of times the molecular weight of PEG degree of polymerization of the polymer molecular weight equal to) classification, such as Shandong Qilu Petrochemical Plant production PVC
Resin, manufactured products for the SK-700; SK-800; SK-1000; SK-1100; SK-1200 and so on. SG-5 resin, which corresponds to
The polymerization degree of 1000-1100. Physical and chemical properties of PVC resin see Part IV.
PVC powder as a white powder, density of 1.35-1.45g/cm3, the densities at 0.4-0.5g /
cm3. Depending on the size of the plasticizer content can be as soft and hard wares, usually 0-5 parts plasticizer content of 5 to 25 parts of hardware products for the semi-hard products, more than 25 parts of soft products. PVC is a non-crystalline, polar polymers, softening temperature and melting temperature is higher, pure PVC generally required
Energy. Moreover, PVC compound containing  Acrylic processing aid chlorine group, and when the temperature reaches 120 ~ C, the pure PVC began unraveling HCl to cause PVC heat
Degradation. Therefore, in the processing to add various additives modification and processing of PVC impact modifier, so that it can be processed into
Useful products.
PVC resin is mainly used to produce various types of film (such as daily printing film, industrial packaging film, agricultural greenhouse film and shrink film

stearate dried to obtain opportunities

Drying snatched stearate
 Stearate is an additive for a wide range, the most important role for the polymers
Very good results. Such as polyolefins can be used as an methyl tin stabilizer  acid neutralizer, the article has a good lubricating effect,
Increase life expectancy (for thermosetting products concerned). Market, stearate great demand, generally focused on: Hard
Fat, calcium stearate, zinc stearate, sodium these types. Lianyungang Huaming Tai Material Technology Co., Ltd. is mainly engaged in it
Is that the three categories stearate. Flash dryer as stearate final process section. More than two years, the  foaming agent use of easy
Degree stearate flash dryer for drying effect is remarkable, not only high production efficiency, and human resources required
Source less, greatly reducing the cost of doing business. Drying stearate (calcium stearate, zinc stearate, sodium stearate), the main difficulty lies in mesh powder had
Low in the red iron oxide  dry dust collection can not be good when I expected. Choose the traditional bag dust removal equipment can not solve this
A problem. In response to this situation, the traditional baghouse has been improved, to ensure production of large front
Mention the next, so that the maximum amount of material is collected. Stearate using flash dryer drying, the effect is significant, and
Using flash drying equipment longer high production requirements under full load operation.

China's plastics processing aids Market Analysis and Forecast

 Is a kind of plastic processing aids to improve processability and

performance plastics additives, has formed, including plasticizers, flame

retardants, heat stabilizers, antistatic agents, light stabilizers,

antioxidants, impact-modified agents, processing lubricants, coloring

agents, and many varieties of large-scale fine PVC lubricant  chemical industries.

Currently, the global annual consumption of plastics processing aids

synthetic resin production accounts for 10% of total reached 11 million

tons. Of China's plastics processing chemicals industry since the 1950s

started, has been developed to a considerable scale, as China's

petrochemical industry and the rapid development of the plastics processing

industry is expected to 2010 will be more progress, development prospects

are quite broad.

A private plasticizer plasticizer present the whole annual production

capacity has reached 5,000,000 t, there are more than 500 varieties.

China's current total annual production capacity of plasticizers have more

than 700,000 t, a hundred manufacturers, the main varieties are phthalates,

which dioctyl phthalate and dibutyl phthalate as Lord. In addition,

terephthalic acid esters, chlorinated paraffins, alkyl sulfonic acid

esters, aliphatic dibasic acid esters, epoxy esters, phosphate esters,

nearly a hundred species, the  calcium zinc stabilizer common varieties of 20 kinds to 30 kind.

Projected to 2001, China's demand for PVC products for the 2.6 million t,

where hard products is 130 million t, the demand for plasticizers is

600,000 t ~ 65 million t. Plasticizer production capacity to meet existing

needs, but it should be the adjustment of product structure, the

development has a special function or multifunction new varieties,

renovation and expansion of economies of scale devices (annual output of

50,000 tons or more), trustworthy improve product quality, comprehensive

meet market demand. By 2010, China's plastics processing industry

plasticizer total demand will reach 810,000 t.

2 heat stabilizers heat stabilizers currently the world's annual

consumption of 300,000 t, of which the main varieties are lead salts, metal

soaps, organic tin, liquid or solid  foaming agent composite heat stabilizer. Heat

stabilizers of total annual production capacity of 40,000 t or more, about

70 manufacturers, varieties 40 ~ 50. Main varieties of lead salts (Dibasic

lead phosphate, tribasic lead sulphate, lead stearate), metal soaps

(calcium stearate, zinc, cadmium, magnesium, etc.). Organic tin (tin ester,

alkyl tin). The solid compound (liquid) heat stabilizer. One of its

development trends are: lead salt heat stabilizer is still a strong market,

but to promote clean composite lead salts; food and medical use of non-

toxic plastic heat stabilizer, organic tin and a variety of non-dust

pollution composite heat stabilizer market demand will have a larger

growth; human toxic heavy metal heat stabilizers will be restricted.

Three countries in the world with flame retardant regulations have been

promulgated, flame retardants developed very rapidly. Flame retardants in

our country also attaches great importance to the development and

production, more than 50 professional production plant, producing nearly a

hundred varieties, commonly about 30 species, the total production capacity

of 106,000 tons. Among them, chlorinated paraffin 75 000 t, phosphorus-

based halogenated phosphate esters 11,000 t, brominated flame retardants

11,000 t, inorganic flame retardants 06,000 t, the other about 03 million

t. With the amount of plastic and chemical building materials continues to

increase, the country will be an increasing demand for flame retardants, in

1999 the country's total demand for flame retardants has reached 100,000 t,

can be expected to grow in 2001 to 110,000 t ~ 12 万 t, 2010 年 will reach

200,000 t.

4 Antioxidant Antioxidant foreign market development trend stationary, the

main species divided by raw material composition of phenols (both 100

kinds), phosphorus (about 100 kinds), sulfur and amine (about 150 kinds)

and composite antioxidant. In order to meet the growing domestic market

demand for antioxidants, some places will be built kiloton production unit,

will add a total production capacity of 5000t or so.

5 light stabilizer present in the light stabilizer consumption of more than

10,000 t, the main varieties are hindered amines, benzotriazole,

benzophenone and nickel chelates, which hindered amine light stabilizers

annual output of nearly 5000t. China's existing light stabilizer production

plant over 40 varieties of about 8 ~ 9, the main varieties are salicylic

acid esters, benzophenone, benzotriazole, production falls, spending every

year a lot of foreign exchange to import various species 200t. With the

development of the plastics industry, China's light stabilizer demand will

continue to increase in 1999 market consumption is about 2700t, is expected

in 2001 will reach about 3300t, 6000t to 2010 will reach about market

prospects will be very promising.

6 impact modifiers and processing modifiers as chemical building material

industry, hard Yunnan PVC products need to add weathering strong impact

modifier. At present, China's impact modifier total annual production

capacity of 30,000 t, the main varieties of CPE (chlorinated polyethylene)

accounted for 80% or more, as well as a small amount of MBS and other

products. "Ninth Five-Year" period, in order to meet the domestic PVC hard

products processing demands against rushing modifiers have been approved or

are in the construction of various impact modifier devices. "Ninth Five"

end of the country against the punch modifier total demand of about 55,000

t ~ 6.0 million t. Estimated 2001 national confrontation punch modifier

(including processing of improved ACR) total demand will reach 65,000 t ~

7.0 million t. 2010, will reach 136,000 t. Future should develop excellent

performance ACR, MBS local development in the conditional and EVA, PVC hard

products to meet the growing needs of Canadian industry.

7 colorants use of modern plastics processing masterbatch (by the pigment,

carrier resin and additives) coloring process. At present there are about

masterbatch manufacturer with more than 70, of which only 20 kiloton plant

more than in 1999, the production capacity of about 40,000 t / a. China's

plastics processing industry for masterbatch demand will continue to grow

in 1995 and 40,000 t, 2000 year 60 000 t, to 2001 will increase to 64 000

t, 2010 年 will increase to 100,000 t. The future should be the main

development of high concentration, high concentration and multifunctional

masterbatch or special features in order to impart a variety of plastic

products, more vivid colors.

8 lubricant lubricant consumption in plastics processing large annual

consumption of more than 20 million foreign t, where U.S. sales of 100,000

t, China has imported large quantities of plastic processing equipment, and

its rigid PVC resin processing capacity 500 000 t ~ 60 million t, at 0.5%

to 1% of the added amount of calculation, need a variety of lip drops

05,000 t or more. With plastic pipes, doors, windows, profiles the

development of production, the growing demand for lubricants, the total

demand in 1995 will be increased to 05,000 t in 2001 to 26,600 t, is

expected to 2010 will be increased 62,000 t. The future should focus

primarily on developing high-speed high-temperature processing of complex

lubricant, and its products should be fine, multi-functional, no dust

pollution, low toxicity characteristics.
In summary, with China's accession to WTO and the rapid development of the

plastics industry, plastics processing chemicals industry prospects. As

long as domestic and external demand as the basis, focus on changing the

structure of varieties, the development of efficient, versatile, complex,

or a special performance dedicated auxiliaries, develop no dust pollution,

toxic and non-toxic processing aids, the use of more advanced production

process, will be able to China's plastics processing aids development of

the industry on a solid basis in the domestic and international market

competition in an invincible position.

Physical and chemical properties foaming agent

① physical foaming agent: is generally odorless, non-toxic, inert gas, or a good stability, low boiling point non-flammable liquid. Common inert gases are nitrogen, carbon dioxide, and air, low boiling point liquids used tetrachloroethane, methylene chloride, and pentane. In addition, the dissolution of

Solid compound (such as salt) is also commonly used physical blowing agents. Physical blowing agents suitable for polystyrene, polyethylene, polypropylene, polyvinyl chloride foam
② chemical blowing agents: stable at room temperature, and the plastic processing temperature could explain the large amount of gas of the compound. In the foam manufacturing applications is very common. The chemical blowing agent used in industry is the release of most of the nitrogen gas as the main component of an organic compound, and

Can decompose and release ammonia or carbon dioxide, respectively, ammonium bicarbonate and sodium bicarbonate. Chemical blowing agents suitable for various multi-foamed thermoplastics. In order to reduce chemical decomposition temperature of the blowing agent, to improve its dispersion and the amount of foam, often can be activated using one of the

Science foam blowing agent accelerator, or co-blowing agents, such as salicylic acid and urea.

Physical blowing agent class

According to gas generation means, the physical blowing agent and blowing agent can be

divided into two categories chemical foaming agent .
① physical white foaming agent : is generally odorless, non-toxic, inert gas, or a good

stability, low boiling point non-flammable liquid. Common inert gases are nitrogen, carbon

dioxide, and air, low boiling point liquids used tetrachloroethane, methylene chloride, and

pentane. In addition, the dissolution of

Solid compound (such as salt) is also commonly used physical blowing agents. Physical

blowing agents suitable for polystyrene, polyethylene, polypropylene, polyvinyl chloride

foam
② chemical blowing agents: stable at room temperature, and the plastic processing

temperature could explain the large amount of gas of the compound. In the foam

manufacturing applications is very common. The chemical blowing agent used in industry is

the release of most of the nitrogen gas as the main component of an organic compound, and

Can decompose and release ammonia or carbon dioxide, respectively, ammonium bicarbonate and

sodium bicarbonate. Chemical blowing agents suitable for various multi-foamed

thermoplastics. In order to reduce chemical decomposition temperature of the blowing agent,

to improve its dispersion and the amount of foam, often can be activated using one of the

Science foam blowing agent accelerator, or co-blowing agents, such as salicylic acid and

urea.