News Details
Polystyrene plastics antioxidant
2018-1-4 23:52:50
Polystyrene plastics antioxidant
Polystyrene is decomposed in the inert environment and produces polystyrene monomers and oligomers. The unmodified polystyrene is a relatively stable polymer, so some products in some fields can not be added with polystyrene plastic antioxidant.
Repeat the process, easily lead to deterioration of polystyrene, in this case, the need to add polystyrene plastics antioxidant, polystyrene plastic antioxidants commonly used for 3- (3,5 tert butyl -4- hydroxyphenyl) propionate eighteen alkyl ester, stable processing the amount of not more than 0.15%, when necessary and phosphite or l phosphate and used to improve the color.
Polystyrene is more sensitive to photooxidation. Light oxidation products appear, yellowing and embrittlement, using 3- (3,5- tert butyl -4- hydroxyphenyl) propionate eighteen alkyl ester not only have antioxidant properties, but also has anti oxidation effect. The synergistic effect is better if an appropriate amount of UV Absorbents is added.
Compared with unmodified polystyrene, impact resistance of polystyrene (IPS) is much more sensitive to oxidation, which is due to the oxidation of unsaturated double bonds of butadiene segments. Once the copolymer is yellowing, the mechanical properties of the copolymer will decline.
For IPS BHT, 3- is the main antioxidant (3,5- tert butyl -4- hydroxyphenyl) propionate eighteen alkyl ester, three 1,1,3- (5- tert butyl -4- hydroxy -2- methyl phenyl) butane, thio two propionic acid lauryl ester in February. The general amount of addition is 0.1~0.25%.
Polystyrene is a linear structure of plastic made from monomers of styrene. The surface is hard and smooth, with good diaphaneity, strong coloring power, bright color, brittle texture, low impact strength, easy to grind, and easy to break. When knocking, the voice is crisp and easy to break when it breaks, and the relative density is more than l, and it is slightly submerged in water.
Making methods. Lump polymerization. Styrene in inert gas can be controlled in the range of 60 to 90 degrees centigrade and polymerized with two benzoyl peroxide as catalyst. Transparent bulk resin can be obtained. The purity of the resin is high, and the transparency and luster are better.
Emulsion method. Under the action of catalyst, the temperature of water emulsion of styrene monomer was controlled at 80 to 95 degrees centigrade, and then the polymer was separated from the mother liquor, and then the powdered resin was obtained after treatment. The heat resistance of the finished product is slightly higher than that of the bulk polymeric resin, but the electrical insulation and transparency are slightly poor.
Good combustion performance, flammable, after the fire continues to burn, and the smell of styrene release. The flame is yellow and black smoke; it softens and bubbles when burning.
Triphenyl phosphite (TPPi antioxidants, stabilizer) is mainly used in PVC, polyethylene, polypropylene, polystyrene, polyester, abs resin, epoxy resin, synthetic rubber antioxidant stabilizer, used in polyvinyl chloride (PVC) products as a chelating agent, when is given priority to with metal stabilizer, cooperate with this product can reduce the harm of metal chlorides, maintain product transparency, and inhibition of color change, is also a good chemical intermediates, with phosphorus-containing flame retardant and use, can play a role of flame retardant antioxidant, and with stable performance, light can be used for synthesis alkyd resin and polyester, main raw materials for resin, this product can also be preparing pesticide intermediates trimethyl phosphite.
Polystyrene has many disadvantages, such as large brittleness, low softening temperature, easy to crack and crack, which seriously affect its use. In order to eliminate its disadvantages, modified polystyrene has emerged, the way is copolymerization of styrene monomer with other units, or blending of polystyrene with other polymers and copolymers. The main varieties of the modified varieties are as follows:
1. ductile polystyrene
In order to improve the quality of crisp and fragile polystyrene, the Toughening Polystyrene modified with elastomers such as butadiene or butadiene acrylonitrile was used to improve the impact strength of polystyrene, but reduced the transparency and electrical properties of the products.
2. chlorinated styrene
Two chlorine atoms were introduced into the structure of styrene to make the monomer of two chlorobenzene, and then polymerized into two chlorobenzene synthesis resin. The modified polystyrene is still a transparent object, and the heat resistance is improved greatly, and the impact strength is also improved.
3. styrene and propylene guessing copolymer (AS)
The introduction of acrylonitrile monomer can improve the chemical corrosion resistance, heat resistance and mechanical strength of the material, and it does not produce cracks. It is an ideal material.
4. styrene and butadiene, acrylonitrile copolymer (ABS)
Butadiene is a good elastomer, and a variety of monomers have their excellent properties in the copolymers. Therefore, the comprehensive performance of ABS plastics is an ideal engineering plastic.
Polystyrene plastics are widely used in optical instruments, chemical industry and daily necessities, used to make tea, sugar, soap box, cigarette case, a ruler and a comb. As a result of a certain air permeability, when made of film products, it can also make good food packaging materials.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Polystyrene is decomposed in the inert environment and produces polystyrene monomers and oligomers. The unmodified polystyrene is a relatively stable polymer, so some products in some fields can not be added with polystyrene plastic antioxidant.
Repeat the process, easily lead to deterioration of polystyrene, in this case, the need to add polystyrene plastics antioxidant, polystyrene plastic antioxidants commonly used for 3- (3,5 tert butyl -4- hydroxyphenyl) propionate eighteen alkyl ester, stable processing the amount of not more than 0.15%, when necessary and phosphite or l phosphate and used to improve the color.
Polystyrene is more sensitive to photooxidation. Light oxidation products appear, yellowing and embrittlement, using 3- (3,5- tert butyl -4- hydroxyphenyl) propionate eighteen alkyl ester not only have antioxidant properties, but also has anti oxidation effect. The synergistic effect is better if an appropriate amount of UV Absorbents is added.
Compared with unmodified polystyrene, impact resistance of polystyrene (IPS) is much more sensitive to oxidation, which is due to the oxidation of unsaturated double bonds of butadiene segments. Once the copolymer is yellowing, the mechanical properties of the copolymer will decline.
For IPS BHT, 3- is the main antioxidant (3,5- tert butyl -4- hydroxyphenyl) propionate eighteen alkyl ester, three 1,1,3- (5- tert butyl -4- hydroxy -2- methyl phenyl) butane, thio two propionic acid lauryl ester in February. The general amount of addition is 0.1~0.25%.
Polystyrene is a linear structure of plastic made from monomers of styrene. The surface is hard and smooth, with good diaphaneity, strong coloring power, bright color, brittle texture, low impact strength, easy to grind, and easy to break. When knocking, the voice is crisp and easy to break when it breaks, and the relative density is more than l, and it is slightly submerged in water.
Making methods. Lump polymerization. Styrene in inert gas can be controlled in the range of 60 to 90 degrees centigrade and polymerized with two benzoyl peroxide as catalyst. Transparent bulk resin can be obtained. The purity of the resin is high, and the transparency and luster are better.
Emulsion method. Under the action of catalyst, the temperature of water emulsion of styrene monomer was controlled at 80 to 95 degrees centigrade, and then the polymer was separated from the mother liquor, and then the powdered resin was obtained after treatment. The heat resistance of the finished product is slightly higher than that of the bulk polymeric resin, but the electrical insulation and transparency are slightly poor.
Good combustion performance, flammable, after the fire continues to burn, and the smell of styrene release. The flame is yellow and black smoke; it softens and bubbles when burning.
Triphenyl phosphite (TPPi antioxidants, stabilizer) is mainly used in PVC, polyethylene, polypropylene, polystyrene, polyester, abs resin, epoxy resin, synthetic rubber antioxidant stabilizer, used in polyvinyl chloride (PVC) products as a chelating agent, when is given priority to with metal stabilizer, cooperate with this product can reduce the harm of metal chlorides, maintain product transparency, and inhibition of color change, is also a good chemical intermediates, with phosphorus-containing flame retardant and use, can play a role of flame retardant antioxidant, and with stable performance, light can be used for synthesis alkyd resin and polyester, main raw materials for resin, this product can also be preparing pesticide intermediates trimethyl phosphite.
Polystyrene has many disadvantages, such as large brittleness, low softening temperature, easy to crack and crack, which seriously affect its use. In order to eliminate its disadvantages, modified polystyrene has emerged, the way is copolymerization of styrene monomer with other units, or blending of polystyrene with other polymers and copolymers. The main varieties of the modified varieties are as follows:
1. ductile polystyrene
In order to improve the quality of crisp and fragile polystyrene, the Toughening Polystyrene modified with elastomers such as butadiene or butadiene acrylonitrile was used to improve the impact strength of polystyrene, but reduced the transparency and electrical properties of the products.
2. chlorinated styrene
Two chlorine atoms were introduced into the structure of styrene to make the monomer of two chlorobenzene, and then polymerized into two chlorobenzene synthesis resin. The modified polystyrene is still a transparent object, and the heat resistance is improved greatly, and the impact strength is also improved.
3. styrene and propylene guessing copolymer (AS)
The introduction of acrylonitrile monomer can improve the chemical corrosion resistance, heat resistance and mechanical strength of the material, and it does not produce cracks. It is an ideal material.
4. styrene and butadiene, acrylonitrile copolymer (ABS)
Butadiene is a good elastomer, and a variety of monomers have their excellent properties in the copolymers. Therefore, the comprehensive performance of ABS plastics is an ideal engineering plastic.
Polystyrene plastics are widely used in optical instruments, chemical industry and daily necessities, used to make tea, sugar, soap box, cigarette case, a ruler and a comb. As a result of a certain air permeability, when made of film products, it can also make good food packaging materials.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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