Heat stabilizers for PVC and a variety of plastics processing lubricant , release agent . In rigid products , and aluminium hydroxide the base of lead salts , lead soap can increase the gelation speed. Also used in food packaging, medical equipment and other requirements nontoxic soft film and equipment. Can be made of polyethylene , polypropylene, halogen absorbent to remove the residual catalyst on the adverse effects of color and stability . As a plasticizer in rubber processing , make the whole into a natural rubber and rubber softening , and almost no effect on curing . Also used as a molding of polyolefin fibers and lubricants , grease thickening agent, textile black iron oxide waterproofing agent, paint flatting agent , when manufacturing plastic LP plasticizers. Also used in pencil manufacturing and pharmaceutical , perfume industry . Polyolefin polyolefin acid neutralizer color stability and corrosion have a direct contribution ;
Lubricating / processing aids improve the polyolefins, polyamides , styrene and rubber in the extrusion molding ( film, fiber , profiling , etc. ) , and press molding processability.
Release properties of the thermoplastic plastics , rubber, and thermoset articles, such as unsaturated polyester polyurethane foam . Storage
The product packaging woven bag lined Plastic chemical with plastic bag, 20KG or 10KG, stored in a cool , dry place , away from sources of fire , moisture , heat, not with acid, alkali and corrosive substances mixed Commonwealth Games .
Optical brightener
2013年9月16日星期一
Calcium stearate nature
Calcium stearate uniform fine white powder. Melting point 175 ℃, density 1.035g/cm3. Dissolved in toluene , ethanol, benzene and other organic solvents , insoluble in water . Slowly fluorescent brightener heated to 400 ℃, decomposition, combustible , the case of decomposition of stearic acid and corresponding calcium salts . Water absorption, non-toxic.
Use heat stabilizers for PVC and a variety of plastics processing lubricant , release agent . In rigid products , and the base of lead salts , lead soap can increase the gelation speed. Also used in food packaging, medical equipment and other requirements nontoxic soft film and equipment. Can be made of polyethylene , polypropylene, halogen absorbent to PVC window stabilizer remove the residual catalyst on the adverse effects of color and stability . As a plasticizer in rubber processing , make the whole into a natural rubber and rubber softening , and almost no effect on curing . Also used as a molding of polyolefin fibers and lubricants , grease thickening agent, textile waterproofing agent, paint flatting agent , when manufacturing plastic LP plasticizers. Also used in pencil manufacturing and pharmaceutical , perfume industry .
Action
Polyolefins polyolefin acid neutralizer and blowing agent corrosion stability of the color is directly offered ; lubricating / processing aids improve the polyolefins, polyamides , styrene and rubber in the extrusion molding ( film, fiber , copying , etc. ) , and press molding processability. Release properties of the thermoplastic plastics , rubber, and thermoset articles, such as polyurethane foam
Unsaturated polyester
Use heat stabilizers for PVC and a variety of plastics processing lubricant , release agent . In rigid products , and the base of lead salts , lead soap can increase the gelation speed. Also used in food packaging, medical equipment and other requirements nontoxic soft film and equipment. Can be made of polyethylene , polypropylene, halogen absorbent to PVC window stabilizer remove the residual catalyst on the adverse effects of color and stability . As a plasticizer in rubber processing , make the whole into a natural rubber and rubber softening , and almost no effect on curing . Also used as a molding of polyolefin fibers and lubricants , grease thickening agent, textile waterproofing agent, paint flatting agent , when manufacturing plastic LP plasticizers. Also used in pencil manufacturing and pharmaceutical , perfume industry .
Action
Polyolefins polyolefin acid neutralizer and blowing agent corrosion stability of the color is directly offered ; lubricating / processing aids improve the polyolefins, polyamides , styrene and rubber in the extrusion molding ( film, fiber , copying , etc. ) , and press molding processability. Release properties of the thermoplastic plastics , rubber, and thermoset articles, such as polyurethane foam
Unsaturated polyester
2013年9月15日星期日
plasticizer simple description
Plasticizers ( English : Plasticizer), also known as a plasticizer, a plasticizer , an increase in softness of the material or liquefied additive material . Add object contains plastic , concrete , drywall materials, cement and gypsum and so on. The same kind of plasticizing agent often fluorescent brightener used in different objects , but its effect is often not the same. Plasticizer range up to hundreds of kinds , but the most commonly used means one group of compounds known as phthalates . According to statistics, in 2004 the world's plasticizing agent market, totaled about 550 million tons and 6,000,000 tons moving toward . Add a plasticizer based plastics used functions in different environments, manufactured with a variety of toughness and softness , gloss finished , which required more soft plastic products the more plasticizer added . General often use plastic wrap , one is without additives PE (polyethylene ) material , but its viscosity is poor ; Another widely used is PVC (polyvinyl chloride ) plastic wrap, a large number of plasticizers to make PVC material becomes soft and increases viscosity, very suitable for fresh food packaging.
Use concrete plasticizer ( superplasticizer ) , can increase the workability of the mixture is not easy to produce cellular facilitate construction , thereby reducing the water content ratio , increase the intensity . The wall material can be increased by adding a mixture of plasticizers liquefaction degree , so they do not add too much water , can reduce the time required for drying the wall .
Basic categories
Internal plasticizer
Internal plasticizer is actually part of the PVC profile stabilizer polymer . Plasticizers are generally within the polymer during the polymerization of the second monomer introduced . Since the second monomer in the polymer molecular structure , reducing the polymer molecule chains are isotactic , which reduces the crystallinity of the polymer chain . Such as vinyl chloride - vinyl acetate copolymer softer than vinyl chloride homopolymer . The use of plasticizers within the temperature range is relatively narrow , and must be added during the polymerization , so use less internal plasticizer .
External plasticizer
External plasticizer is a low molecular weight compounds or polymers , it is required to add the polymer plasticized , increase the plasticity of polymers . External plasticizer is generally a high boiling point of less volatile liquid or low melting point solids , and the stearate magnesium vast majority of organic compounds are esters . Usually they do not react with the polymer , and the interaction of the polymer mainly in the swelling action of elevated temperatures , with the polymer to form a solid solution . External plasticizers production and a more comprehensive and easy to use, very wide application . Now people are referring to the general said plasticizer external plasticizer. Dioctyl phthalate (DOP) and dibutyl phthalate (DBP) are outside the plasticizer
Use concrete plasticizer ( superplasticizer ) , can increase the workability of the mixture is not easy to produce cellular facilitate construction , thereby reducing the water content ratio , increase the intensity . The wall material can be increased by adding a mixture of plasticizers liquefaction degree , so they do not add too much water , can reduce the time required for drying the wall .
Basic categories
Internal plasticizer
Internal plasticizer is actually part of the PVC profile stabilizer polymer . Plasticizers are generally within the polymer during the polymerization of the second monomer introduced . Since the second monomer in the polymer molecular structure , reducing the polymer molecule chains are isotactic , which reduces the crystallinity of the polymer chain . Such as vinyl chloride - vinyl acetate copolymer softer than vinyl chloride homopolymer . The use of plasticizers within the temperature range is relatively narrow , and must be added during the polymerization , so use less internal plasticizer .
External plasticizer
External plasticizer is a low molecular weight compounds or polymers , it is required to add the polymer plasticized , increase the plasticity of polymers . External plasticizer is generally a high boiling point of less volatile liquid or low melting point solids , and the stearate magnesium vast majority of organic compounds are esters . Usually they do not react with the polymer , and the interaction of the polymer mainly in the swelling action of elevated temperatures , with the polymer to form a solid solution . External plasticizers production and a more comprehensive and easy to use, very wide application . Now people are referring to the general said plasticizer external plasticizer. Dioctyl phthalate (DOP) and dibutyl phthalate (DBP) are outside the plasticizer
how to distinguish good plasticizer
Resin has good compatibility , compatibility is insufficient, the pneumatic tube plasticizer separated from the resin , the performance of exudation, sweating phenomenon. Pneumatic tubes zinc stearate incompatible with the resin plasticizer , plasticizing efficiency of the question.
Plasticizer variety, then have what conditions it can be called a good plasticizer , today teach you the recipe :
1 . High plasticizing efficiency , with less to obtain a higher amount of added plasticizing effect .
2 . Good compatibility with resin , compatibility is insufficient, the pneumatic tube plasticizer separated from the chromium oxide resin , the performance of exudation, sweating phenomenon. Pneumatic tubes incompatible with the resin plasticizer , plasticizing efficiency of the question.
3 . Low volatility, reduce and pneumatic tube forming volatile loss during storage for pneumatic tube performance. Car decoration , wire and cable and other areas have higher requirements for volatile . 4 . Durability , water , oil, organic solvent extraction .
5 . Do not migrate , pneumatic tube plasticizers are not supposed to come into contact with other solid medium diffusion .
6 . Cold, and requires the processing temperature is still good softness . This agricultural films and outdoor use aluminium stearate pneumatic tubes is very important.
7 . Good heat resistance , requiring the use of higher processing temperatures and temperature stable .
8 . Non-toxic, tasteless , odorless and colorless.
9 . Good resistance to fungal
10 . Flame retardant
11 . Good electrical insulation
12 stain resistance, chemical etching
13 . When the plastisol is used , requires that the preparation of the plastisol viscosity stability is good.
Plasticizer variety, then have what conditions it can be called a good plasticizer , today teach you the recipe :
1 . High plasticizing efficiency , with less to obtain a higher amount of added plasticizing effect .
2 . Good compatibility with resin , compatibility is insufficient, the pneumatic tube plasticizer separated from the chromium oxide resin , the performance of exudation, sweating phenomenon. Pneumatic tubes incompatible with the resin plasticizer , plasticizing efficiency of the question.
3 . Low volatility, reduce and pneumatic tube forming volatile loss during storage for pneumatic tube performance. Car decoration , wire and cable and other areas have higher requirements for volatile . 4 . Durability , water , oil, organic solvent extraction .
5 . Do not migrate , pneumatic tube plasticizers are not supposed to come into contact with other solid medium diffusion .
6 . Cold, and requires the processing temperature is still good softness . This agricultural films and outdoor use aluminium stearate pneumatic tubes is very important.
7 . Good heat resistance , requiring the use of higher processing temperatures and temperature stable .
8 . Non-toxic, tasteless , odorless and colorless.
9 . Good resistance to fungal
10 . Flame retardant
11 . Good electrical insulation
12 stain resistance, chemical etching
13 . When the plastisol is used , requires that the preparation of the plastisol viscosity stability is good.
2013年9月13日星期五
PVC heat stabilizers for PVC transparent three major factors affecting
PVC heat stabilizers of PVC to a certain extent affect the transparency . PVC heat stabilizers are also PVC additives can not be missing , so no PVC heat stabilizers for PVC will lose acrylic processing a lot of practical value. So people are constantly on the PVC heat stabilizers biochemical research . Here polyvinyl chloride PVC heat stabilizers affect the transparency of the three factors , and we do a study . 1, the refractive index of the stabilizer
PVC resin, heat stabilizer and 1.52 to 1.55 of the refractive index of the visible light are the same or similar, then the better the transparency of PVC products , the transparency is low and vice versa .
2 , stabilizer molecules ( molecules ) of linear length
Heat stabilizer molecule tio2 rutile ( or molecules ) linear length is less than 400 ~ 735nm wavelength of visible light refracting fewer higher degree of transparency , whereas less transparent . 3 , a heat stabilizer in PVC , " solubility ", ie compatibility
The so-called compatibility of two or more substances refers to the mutual affinity when mixed . Good compatibility is possible to achieve dispersion of the molecular level . Thermal stabilizer in the molten state has good compatibility with PVC resin . Do not form a two -phase , that iron oxide black is no interface or the interface is not obvious, less refracted light , PVC products, higher transparency . Liquid stabilizer than the corresponding solid metal soap good compatibility in PVC , the linear molecule has a smaller length , and thus the higher the transparency of the PVC
PVC resin, heat stabilizer and 1.52 to 1.55 of the refractive index of the visible light are the same or similar, then the better the transparency of PVC products , the transparency is low and vice versa .
2 , stabilizer molecules ( molecules ) of linear length
Heat stabilizer molecule tio2 rutile ( or molecules ) linear length is less than 400 ~ 735nm wavelength of visible light refracting fewer higher degree of transparency , whereas less transparent . 3 , a heat stabilizer in PVC , " solubility ", ie compatibility
The so-called compatibility of two or more substances refers to the mutual affinity when mixed . Good compatibility is possible to achieve dispersion of the molecular level . Thermal stabilizer in the molten state has good compatibility with PVC resin . Do not form a two -phase , that iron oxide black is no interface or the interface is not obvious, less refracted light , PVC products, higher transparency . Liquid stabilizer than the corresponding solid metal soap good compatibility in PVC , the linear molecule has a smaller length , and thus the higher the transparency of the PVC
Why do we need PVC heat stabilizers Processing
PVC heat stabilizers Processing Why do we need ?
PVC is the first ideal structure - tail structure -CH2-CHCl-CH2-CHCl-, is quite stable . But so far the PVC synthesis method can not be like synthetic butadiene rubber , as the role of catalyst in stearate aluminum Jigger so there are rules for orientation cis butadiene polymerization .
Radical polymerization of vinyl chloride is a random polymerization , in addition to its first stable - tail structure , there are first - the first structure - CH2-CHCl-CHCl-CH-, tail - tail structure -CHCl-CH2-CH2-CHCl - ; generating a coupling disproportionation vinyl Results CH2 = CH-CHCl-CH2- structure and allyl chloride -CH2-CH = CH-CHCl-CH2 and so on .
Generated in the PVC synthetic allyl chloride, chlorine and tertiary carbon double bond in its molecular chain structure magnesium stearate instability , unstable order : PVC within the molecular chain allyl chloride > tertiary carbon Chlorine > allyl end groups chloride > Chung chlorine. PVC is susceptible to degradation during processing because of the structure of PVC molecular chain instability exists , if not modified for stabilization , the decomposition temperature is about 130 ℃ , but that the PVC resin processed into useful articles , molding temperature to at above 190 ℃ . Therefore , you must add heat stabilizers stabilize its structure improvements.
Pvc in the synthesis process so you need to add PVC heat stabilizers.
PVC is the first ideal structure - tail structure -CH2-CHCl-CH2-CHCl-, is quite stable . But so far the PVC synthesis method can not be like synthetic butadiene rubber , as the role of catalyst in stearate aluminum Jigger so there are rules for orientation cis butadiene polymerization .
Radical polymerization of vinyl chloride is a random polymerization , in addition to its first stable - tail structure , there are first - the first structure - CH2-CHCl-CHCl-CH-, tail - tail structure -CHCl-CH2-CH2-CHCl - ; generating a coupling disproportionation vinyl Results CH2 = CH-CHCl-CH2- structure and allyl chloride -CH2-CH = CH-CHCl-CH2 and so on .
Generated in the PVC synthetic allyl chloride, chlorine and tertiary carbon double bond in its molecular chain structure magnesium stearate instability , unstable order : PVC within the molecular chain allyl chloride > tertiary carbon Chlorine > allyl end groups chloride > Chung chlorine. PVC is susceptible to degradation during processing because of the structure of PVC molecular chain instability exists , if not modified for stabilization , the decomposition temperature is about 130 ℃ , but that the PVC resin processed into useful articles , molding temperature to at above 190 ℃ . Therefore , you must add heat stabilizers stabilize its structure improvements.
Pvc in the synthesis process so you need to add PVC heat stabilizers.
2013年9月12日星期四
The amount of lubricant some introductory
Lubricant actual processing plastics with a variety of effects, such as the kneading , rolling processing , to prevent adhesion polymer cartridge , inhibition of friction and heat, reduce kneading torque and loads, thus preventing polymer material thermal degradation . In the extrusion molding, to improve mobility , the barrel and the polymeric material to improve adhesion of the mold , to prevent and reduce the impact modifier retentate . Another film can improve the appearance and luster. From processing machinery perspective, mixing, rolling , slush molding , etc. , the external lubricant has an important role in extrusion, injection molding, lubricants is more effective.
The amount of lubricant is generally 0.5 % to 1% , selection should pay attention to the following aspects : ( 1 ) the flow properties of the polymer molding technology needs have been met , the primary role of lubrication considerations to ensure that internal and external balance ;
( 2 ) external lubrication is valid , it can be in the molding temperature, the surface layer of the plastic film to form a complete liquid prevail , so the melting point of the lubricant outside the molding temperature should be close, but to a difference of 10 ℃ ~ 30 ℃ order to form a complete film ;
( 3 ) When the lubricant is selected in production , so as to be meet the following requirements:
( 4 ) compatibility with the resin medium size, internal and external lubricating balance ; non-blooming , easy to scale ;
( 5 ) Small surface gravity , viscosity, at the interface scalability, and easy to form the interface layer ;
( 6 ) as far as possible without compromising the excellent performance of the polymer does not affect the performance of the secondary processing of plastics ;
( 6 ) itself is excellent in heat resistance and chemical stability , in the processing does not decompose volatile ;
( 7 ) non-corrosive , does not pollute the film , there is no toxicity.
However, the simple use of a lubricant is often difficult to achieve the purpose , to be used in combination of several lubricants , lubricating composite developed rapidly in recent years , the inganic pigments choice can be viewed from multiple perspectives lubricant.
Commonly used lubricants are stearic acid , butyl stearate , oleamide , ethylene bis stearic acid amide and so on .
Many substances can be used as a lubricant waxes such as natural paraffin, liquid paraffin ( mineral oil ) , microcrystalline wax , etc., but the effect is mixed. Natural wax mostly used external lubrication , the lubricant can be used as a variety of plastic , mold release agents, the general amount 0.2 ~ 1phr, but the compatibility , thermal stability and dispersibility is not good , the amount can not be too large , preferably lubricants and used ; while white oil mostly used PVC, PS internal lubricants, lubricating properties, good thermal stability , the general amount 0.5phr. they are drug-free , can be used for food packaging. Another Microcrystalline wax : in Plastics Processing is also used as a lubricant , the amount of 1 ~ 2Phr, thermal stability and lubricity better than normal paraffin .
Low molecular weight polymers are widely used heat stabilizer for foaming board as a lubricant such as polyethylene wax, low molecular weight polypropylene , its internal and external lubrication are better, and non-toxic . PVC and polyethylene wax materials suitable for extrusion, calendering , the dosage is usually 0.1 ~ 1phr, to improve processing efficiency, prevent the film adhesion, improved dispersion of the filler or pigment , compatibility and transparency is not very good ; irregular low molecular weight polypropylene can be used as the structure rigid PVC, PE lubricant performance, can improve the dispersibility of other additives .
The amount of lubricant is generally 0.5 % to 1% , selection should pay attention to the following aspects : ( 1 ) the flow properties of the polymer molding technology needs have been met , the primary role of lubrication considerations to ensure that internal and external balance ;
( 2 ) external lubrication is valid , it can be in the molding temperature, the surface layer of the plastic film to form a complete liquid prevail , so the melting point of the lubricant outside the molding temperature should be close, but to a difference of 10 ℃ ~ 30 ℃ order to form a complete film ;
( 3 ) When the lubricant is selected in production , so as to be meet the following requirements:
( 4 ) compatibility with the resin medium size, internal and external lubricating balance ; non-blooming , easy to scale ;
( 5 ) Small surface gravity , viscosity, at the interface scalability, and easy to form the interface layer ;
( 6 ) as far as possible without compromising the excellent performance of the polymer does not affect the performance of the secondary processing of plastics ;
( 6 ) itself is excellent in heat resistance and chemical stability , in the processing does not decompose volatile ;
( 7 ) non-corrosive , does not pollute the film , there is no toxicity.
However, the simple use of a lubricant is often difficult to achieve the purpose , to be used in combination of several lubricants , lubricating composite developed rapidly in recent years , the inganic pigments choice can be viewed from multiple perspectives lubricant.
Commonly used lubricants are stearic acid , butyl stearate , oleamide , ethylene bis stearic acid amide and so on .
Many substances can be used as a lubricant waxes such as natural paraffin, liquid paraffin ( mineral oil ) , microcrystalline wax , etc., but the effect is mixed. Natural wax mostly used external lubrication , the lubricant can be used as a variety of plastic , mold release agents, the general amount 0.2 ~ 1phr, but the compatibility , thermal stability and dispersibility is not good , the amount can not be too large , preferably lubricants and used ; while white oil mostly used PVC, PS internal lubricants, lubricating properties, good thermal stability , the general amount 0.5phr. they are drug-free , can be used for food packaging. Another Microcrystalline wax : in Plastics Processing is also used as a lubricant , the amount of 1 ~ 2Phr, thermal stability and lubricity better than normal paraffin .
Low molecular weight polymers are widely used heat stabilizer for foaming board as a lubricant such as polyethylene wax, low molecular weight polypropylene , its internal and external lubrication are better, and non-toxic . PVC and polyethylene wax materials suitable for extrusion, calendering , the dosage is usually 0.1 ~ 1phr, to improve processing efficiency, prevent the film adhesion, improved dispersion of the filler or pigment , compatibility and transparency is not very good ; irregular low molecular weight polypropylene can be used as the structure rigid PVC, PE lubricant performance, can improve the dispersibility of other additives .
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