News Details
Plastic products antioxidants
2018-1-12 11:38:33
Plastic products antioxidants
Plastic products, especially the surface area and volume (or weight ratio) value relatively small, opaque products oxidation reaction mainly occurs on the surface of products, which requires plastics antioxidants continuously from plastic products surface of internal migration to products play a role. But if the migration to the surface too fast, the migration amount is too large, plastics antioxidants will evaporate into the environment, on the surface of the products or spread to contact with the surface of other medium and loss, the loss is inevitable, in fact, the design formula should be considered.
When plastics antioxidants varieties have a choice, should choose relatively large molecular weight, high melting point appropriate varieties, and in the most severe processing conditions and using the environment as the prerequisite to determine the amount of adding antioxidants.
Carbon black can be used in many kinds of plastic materials and products, and the largest amount of black filler material, can be used as a dye, as well as a light stabilizer for plastic materials. Carbon black except for some phenolic antioxidants in polypropylene has weakened the effectiveness of, also can be in low pressure polyethylene with antioxidant butylated hydroxytoluene, butylated hydroxytoluene almost completely lost effectiveness, at the same time the light stability of carbon black itself is also greatly reduced. The outdoor exposure life of the low-pressure polyethylene sheet with 1% tank method carbon black and 0.1%BHT was added, and only about 40% of the outdoor exposure life of the low-pressure polyethylene flake with 1% tank method was added. For polyethylene, polypropylene and other plastic materials, carbon black as the colorant or light stabilizer must be used with appropriate antioxidant. Otherwise, not only reduce the effectiveness of antioxidant, but also reduce the outdoor light stability of plastic products.
After surface treatment of high purity, high quality titanium dioxide, if in high mix machine and extruder feeding period of residence time is too long, can be damaged due to friction part surface treatment layer, even if the plastic products with a more efficient antioxidant, products actual aging resistance but also difficult to meet the design requirements.
Amount of adding antioxidants in plastic products, generally between 0.5% ~ 1.5%, if a large number of bonded on the inner wall of the blender mixing, or hot working volatilize quantity is too high, the products in the proportion of antioxidant actual quantity will be lower than formula design flow.
If the mixture of antioxidant and resin is not uniform in processing, the anti-oxygen agent in the product must be unevenly distributed. In use process, distribution of mechanical properties by antioxidant products quantity is too low or the lowest local mechanical properties decision, local low mechanical properties led to the anti aging plastic products lost use value in advance.
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.
Cas no. : 101-02-0
HS: 29209019.00
The most important index of products: colorless, yellow liquid
Density (rho) 2525:1.183-1.192, refractive index (eta 020) : 1.585 1.590, freezing point ° C: 19-24, chloride (Cl - %) : 0.20 or less
Tax refund: the current tax refund of Triphenyl phosphite is 9 percent
Raw materials: phenol, phosphorus trichloride, phosphorus trichloride.
Test data indicate:
1) 6 pieces of polyethylene films thickness range in 0.109-0.138 ㎜, # 5 membrane has the thickness of the crack and crack position deviation slightly;
The tensile strength range of 6 polyethylene film was 9.6 ~ 21.1MPa, and the fracture elongation range was 32% ~ 750%. The tensile properties of the 6# film are the highest, the appearance is not broken, and the second is the 4# film. The appearance rupture is serious, the tensile property value is lower is 3#, 2# film. The tensile properties of each membrane were higher than that of the cracked parts.
The carbonyl index of the 6 polyethylene film was 0.48-10.66, the lowest of the carbonyl group was 6# film, only 0.48, followed by 4# film, and the largest one was 1# (1 - a), with the rupture of the membrane, which was 10.66. The carbonyl index of each film is less than the cracked part. Test conclusion: six inspection by the tensile property of polyethylene films, thickness and carbonyl index data, different number of membrane performance between different parts, the same number of membrane performance show significant difference.
The main effect of light stabilizer is to shield light, absorb and transfer light energy, quench or capture free radicals. Light stabilizer is generally divided into four categories: light screen, ultraviolet absorber, quenching agent and retarded amine light stabilizer.
Hindered amine light stabilizer (HALS) is a kind of organic amine compound with space steric effect, and because of its decomposition of hydrogen peroxide, quenching state oxygen free radicals, capture, and effective groups can recycling function, is one of the largest class of light stabilizer dosage at home and abroad. Domestic hindered amine light stabilizer consumption accounts for about 65% of domestic light stabilizer consumption.
Ultraviolet absorption type light stabilizer known as ultraviolet absorbent, this kind of light stabilizer is using its molecular structure, convert light energy into heat energy, avoid plastic material light oxidation and light stability. The ultraviolet absorbent is divided into diphenylketone and benzotriazole according to the molecular structure. In China, the consumption of diphenylketone stabilizer and benzotriazole light stabilizer accounted for 25% and 10% of the total domestic light stabilizer consumption.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
Plastic products, especially the surface area and volume (or weight ratio) value relatively small, opaque products oxidation reaction mainly occurs on the surface of products, which requires plastics antioxidants continuously from plastic products surface of internal migration to products play a role. But if the migration to the surface too fast, the migration amount is too large, plastics antioxidants will evaporate into the environment, on the surface of the products or spread to contact with the surface of other medium and loss, the loss is inevitable, in fact, the design formula should be considered.
When plastics antioxidants varieties have a choice, should choose relatively large molecular weight, high melting point appropriate varieties, and in the most severe processing conditions and using the environment as the prerequisite to determine the amount of adding antioxidants.
Carbon black can be used in many kinds of plastic materials and products, and the largest amount of black filler material, can be used as a dye, as well as a light stabilizer for plastic materials. Carbon black except for some phenolic antioxidants in polypropylene has weakened the effectiveness of, also can be in low pressure polyethylene with antioxidant butylated hydroxytoluene, butylated hydroxytoluene almost completely lost effectiveness, at the same time the light stability of carbon black itself is also greatly reduced. The outdoor exposure life of the low-pressure polyethylene sheet with 1% tank method carbon black and 0.1%BHT was added, and only about 40% of the outdoor exposure life of the low-pressure polyethylene flake with 1% tank method was added. For polyethylene, polypropylene and other plastic materials, carbon black as the colorant or light stabilizer must be used with appropriate antioxidant. Otherwise, not only reduce the effectiveness of antioxidant, but also reduce the outdoor light stability of plastic products.
After surface treatment of high purity, high quality titanium dioxide, if in high mix machine and extruder feeding period of residence time is too long, can be damaged due to friction part surface treatment layer, even if the plastic products with a more efficient antioxidant, products actual aging resistance but also difficult to meet the design requirements.
Amount of adding antioxidants in plastic products, generally between 0.5% ~ 1.5%, if a large number of bonded on the inner wall of the blender mixing, or hot working volatilize quantity is too high, the products in the proportion of antioxidant actual quantity will be lower than formula design flow.
If the mixture of antioxidant and resin is not uniform in processing, the anti-oxygen agent in the product must be unevenly distributed. In use process, distribution of mechanical properties by antioxidant products quantity is too low or the lowest local mechanical properties decision, local low mechanical properties led to the anti aging plastic products lost use value in advance.
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.
Cas no. : 101-02-0
HS: 29209019.00
The most important index of products: colorless, yellow liquid
Density (rho) 2525:1.183-1.192, refractive index (eta 020) : 1.585 1.590, freezing point ° C: 19-24, chloride (Cl - %) : 0.20 or less
Tax refund: the current tax refund of Triphenyl phosphite is 9 percent
Raw materials: phenol, phosphorus trichloride, phosphorus trichloride.
Test data indicate:
1) 6 pieces of polyethylene films thickness range in 0.109-0.138 ㎜, # 5 membrane has the thickness of the crack and crack position deviation slightly;
The tensile strength range of 6 polyethylene film was 9.6 ~ 21.1MPa, and the fracture elongation range was 32% ~ 750%. The tensile properties of the 6# film are the highest, the appearance is not broken, and the second is the 4# film. The appearance rupture is serious, the tensile property value is lower is 3#, 2# film. The tensile properties of each membrane were higher than that of the cracked parts.
The carbonyl index of the 6 polyethylene film was 0.48-10.66, the lowest of the carbonyl group was 6# film, only 0.48, followed by 4# film, and the largest one was 1# (1 - a), with the rupture of the membrane, which was 10.66. The carbonyl index of each film is less than the cracked part. Test conclusion: six inspection by the tensile property of polyethylene films, thickness and carbonyl index data, different number of membrane performance between different parts, the same number of membrane performance show significant difference.
The main effect of light stabilizer is to shield light, absorb and transfer light energy, quench or capture free radicals. Light stabilizer is generally divided into four categories: light screen, ultraviolet absorber, quenching agent and retarded amine light stabilizer.
Hindered amine light stabilizer (HALS) is a kind of organic amine compound with space steric effect, and because of its decomposition of hydrogen peroxide, quenching state oxygen free radicals, capture, and effective groups can recycling function, is one of the largest class of light stabilizer dosage at home and abroad. Domestic hindered amine light stabilizer consumption accounts for about 65% of domestic light stabilizer consumption.
Ultraviolet absorption type light stabilizer known as ultraviolet absorbent, this kind of light stabilizer is using its molecular structure, convert light energy into heat energy, avoid plastic material light oxidation and light stability. The ultraviolet absorbent is divided into diphenylketone and benzotriazole according to the molecular structure. In China, the consumption of diphenylketone stabilizer and benzotriazole light stabilizer accounted for 25% and 10% of the total domestic light stabilizer consumption.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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