News Details
General-purpose plastic antioxidant
2018-1-16 12:16:19
General-purpose plastic antioxidant
With the worldwide production of synthetic materials, especially general plastic, the yield is increasing rapidly. Promote and stimulate the rapid growth of the production capacity of general-purpose plastics. The production capacity of general-purpose plastic antioxidant was increased from 130kt in 1995 to 240kt in 2003. The average annual growth rate is around 8%, higher than the growth rate of some traditional plastic additives.
General-purpose plastics antioxidants are high efficiency, low price and good compatibility with resin and not easy to precipitate, low toxicity, etc. The emphasis is placed on the synergies and advocate complementary antioxidant concentrated masterbatch. At the same time, we develop a new variety with high molecular weight. Is the most representative IrganoxB series products. It is a different main antioxidant and auxiliary antioxidant 168 [three (2.4 two tertiary butyl phenyl)] phosphite ester compound, its successful development, both reduced the amount of expensive main antioxidant, and improve the performance of the plastic products.
565, 1425WL, 1098 and other varieties are also excellent new varieties. Phenol antioxidants account for over 50% of the international market. At present, the biggest consumption in the market is cheap BHT and ir-ganox1010, 1076, Irgaphos168 and its complex.
At present, the research of antioxidant is concentrated on polyolefin and styrene resin. The main antioxidant is compared with the auxiliary antioxidant.
BHT was suspected to be carcinogenic, but the FDA considers BHT safe. At the same time, it has a large wave and a large hair, and the resin is easy to turn yellow at higher processing temperature. However, due to its low price, it is significantly lower than the price of the substituted substance of the high molecular weight. Therefore, its market consumption remains unchanged.
With the rapid development of plastics industry in China, the development of plastic antioxidant is stimulated and promoted. China's plastic antioxidant industry has made great progress in product structure, product quality, production scale, synthetic technology and equipment control.
The antioxidant industry has been increasing production, and has developed many new varieties of antioxidant, such as 3114, 1790, 245, etc., which have begun to produce batch production capacity. Other chemical industry research institute of Shanxi Province and development of three kinds of pentaerythritol varieties appeared double phosphite ester structure. With a high resistance to hydrolysis stability, high heat resistance antioxidant activity of bisphenol a phosphite development has started.
Development institute, Beijing auxiliaries sulfide type of antioxidant 1035 in chemical crosslinking cable materials instead of antioxidant 1010 lowers antioxidants in the formula and the dosage of crosslinking agent. To make up for the lack the main antioxidant in the crosslinking polyethylene. Currently there are quite a number of export products. In recent years, several compound antioxidant formulations and varieties have been developed and developed domestically.
With the rapid development of China's plastics industry, the development of China's plastics industry has brought great space to the development of antioxidant industry.
Triphenyl phosphite (antioxidant, stabilizer TPPi) production process
1. Phosphorus oxychloride as the direct method (also called thermal method) phenol with pyridine and anhydrous benzene as solvent, in no more than 10 ℃ temperature, slowly add oxygen phosphorus chloride, then under reflux temperature, the reaction of 3 ~ 4 h. After cooling to room temperature, the reactants are washed by water to recycle pyridine. After centrifugal dehydration, the reagents are dehydrated with dried sodium sulfate, which is filtered to remove sodium sulfate. The first atmospheric distillation recovery of benzene, vacuum distillation, collected 243 ~ 245 ℃ (1.47 kPa) fraction, by cooling, crystallization, crushing is the finished product.
2. After phenol melting, stirring under add phosphorus trichloride under 25 ℃, Triphenyl phosphite is generated; Then heat up to 70 ℃ ventilation with chlorine gas, generated two chlorinated triphenyl phosphate; Again at 50 ℃ water hydrolysis, triphenyl phosphate. The hydrolysate with 5% soda solution for neutralization, water washing, the evaporation and vacuum distillation, collected 243 ~ 245 ℃ (1.47 kPa) fractions, cooling, crystallization, crushing, packaging is the finished product.
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.
Some of the plastic varieties that people use for large, low price, wide use and wide impact are called universal plastics. Its connotation often changes with the development of time and science and technology. Important general plastics are polyethylene, polypropylene, polyvinyl chloride, polystyrene and other varieties.
General plastics including polyethylene, polypropylene, polystyrene, PVC, ABS, acrylic - butadiene - styrene), poly (methyl benzene acid methyl ester and amino plastics and so on, its production accounted for more than 90% of the whole plastic production, so it is also called the large plastic varieties.
Polyethylene is the most productive variety in the plastics industry. Polyethylene is not transparent or translucent crystalline plastics, qualitative light, good low temperature resistance (the lowest temperature can reach 70 ~ 100 ℃), electrical insulation, chemical stability is good, most of acid and alkali erosion, but not heat. Polyethylene is suitable for injection molding, blow molding, extrusion and other methods. PE can be divided according to density: LDPE LDPE; HDPE HDPE; Linear low density polyethylene LLDPE.
Polypropylene is propylene polymerization and thermoplastics, is usually colorless, transparent solid, odourless non-toxic, density of 0.90 ~ 0.919 g/cm, is the lightest of general plastic, its outstanding advantage is in the water boiling resistance characteristics, corrosion resistance, strength, rigidity and transparency are better than polyethylene, defect is low temperature impact resistance is poor, aging, but can be respectively through modification and adding additives to improve it.
Polypropylene is widely used because of its low price, good comprehensive performance and easy to process. In particular, the rapid development of polypropylene resin modification technology in recent years has made it widely used. Ordinary polypropylene can be expanded by copolymerization modification, crosslinking modification, grafting modification and other chemical modification methods and physical modification methods, which are comparable to engineering plastics in performance.
Polyvinyl chloride is a plastic made of vinyl chloride. By adding plasticizer, its hardness can be greatly changed. It is made of hard and soft products that have a wide range of USES. PVC in our country USES relatively large is the film class, such as the agricultural use shed film, the plastic cloth, the shed cloth, the packing material; It can be used in the construction industry, such as PVC doors and Windows, up and down pipes, etc. The transparent sheet of PVC is used for food packaging; PVC for artificial leather, making luggage, sofa and other furniture; Used for foaming products, such as sports shoes, automobile cushion, floor leather, wallpaper, etc. Mainly make sheath material in wire and cable.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
With the worldwide production of synthetic materials, especially general plastic, the yield is increasing rapidly. Promote and stimulate the rapid growth of the production capacity of general-purpose plastics. The production capacity of general-purpose plastic antioxidant was increased from 130kt in 1995 to 240kt in 2003. The average annual growth rate is around 8%, higher than the growth rate of some traditional plastic additives.
General-purpose plastics antioxidants are high efficiency, low price and good compatibility with resin and not easy to precipitate, low toxicity, etc. The emphasis is placed on the synergies and advocate complementary antioxidant concentrated masterbatch. At the same time, we develop a new variety with high molecular weight. Is the most representative IrganoxB series products. It is a different main antioxidant and auxiliary antioxidant 168 [three (2.4 two tertiary butyl phenyl)] phosphite ester compound, its successful development, both reduced the amount of expensive main antioxidant, and improve the performance of the plastic products.
565, 1425WL, 1098 and other varieties are also excellent new varieties. Phenol antioxidants account for over 50% of the international market. At present, the biggest consumption in the market is cheap BHT and ir-ganox1010, 1076, Irgaphos168 and its complex.
At present, the research of antioxidant is concentrated on polyolefin and styrene resin. The main antioxidant is compared with the auxiliary antioxidant.
BHT was suspected to be carcinogenic, but the FDA considers BHT safe. At the same time, it has a large wave and a large hair, and the resin is easy to turn yellow at higher processing temperature. However, due to its low price, it is significantly lower than the price of the substituted substance of the high molecular weight. Therefore, its market consumption remains unchanged.
With the rapid development of plastics industry in China, the development of plastic antioxidant is stimulated and promoted. China's plastic antioxidant industry has made great progress in product structure, product quality, production scale, synthetic technology and equipment control.
The antioxidant industry has been increasing production, and has developed many new varieties of antioxidant, such as 3114, 1790, 245, etc., which have begun to produce batch production capacity. Other chemical industry research institute of Shanxi Province and development of three kinds of pentaerythritol varieties appeared double phosphite ester structure. With a high resistance to hydrolysis stability, high heat resistance antioxidant activity of bisphenol a phosphite development has started.
Development institute, Beijing auxiliaries sulfide type of antioxidant 1035 in chemical crosslinking cable materials instead of antioxidant 1010 lowers antioxidants in the formula and the dosage of crosslinking agent. To make up for the lack the main antioxidant in the crosslinking polyethylene. Currently there are quite a number of export products. In recent years, several compound antioxidant formulations and varieties have been developed and developed domestically.
With the rapid development of China's plastics industry, the development of China's plastics industry has brought great space to the development of antioxidant industry.
Triphenyl phosphite (antioxidant, stabilizer TPPi) production process
1. Phosphorus oxychloride as the direct method (also called thermal method) phenol with pyridine and anhydrous benzene as solvent, in no more than 10 ℃ temperature, slowly add oxygen phosphorus chloride, then under reflux temperature, the reaction of 3 ~ 4 h. After cooling to room temperature, the reactants are washed by water to recycle pyridine. After centrifugal dehydration, the reagents are dehydrated with dried sodium sulfate, which is filtered to remove sodium sulfate. The first atmospheric distillation recovery of benzene, vacuum distillation, collected 243 ~ 245 ℃ (1.47 kPa) fraction, by cooling, crystallization, crushing is the finished product.
2. After phenol melting, stirring under add phosphorus trichloride under 25 ℃, Triphenyl phosphite is generated; Then heat up to 70 ℃ ventilation with chlorine gas, generated two chlorinated triphenyl phosphate; Again at 50 ℃ water hydrolysis, triphenyl phosphate. The hydrolysate with 5% soda solution for neutralization, water washing, the evaporation and vacuum distillation, collected 243 ~ 245 ℃ (1.47 kPa) fractions, cooling, crystallization, crushing, packaging is the finished product.
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.
Some of the plastic varieties that people use for large, low price, wide use and wide impact are called universal plastics. Its connotation often changes with the development of time and science and technology. Important general plastics are polyethylene, polypropylene, polyvinyl chloride, polystyrene and other varieties.
General plastics including polyethylene, polypropylene, polystyrene, PVC, ABS, acrylic - butadiene - styrene), poly (methyl benzene acid methyl ester and amino plastics and so on, its production accounted for more than 90% of the whole plastic production, so it is also called the large plastic varieties.
Polyethylene is the most productive variety in the plastics industry. Polyethylene is not transparent or translucent crystalline plastics, qualitative light, good low temperature resistance (the lowest temperature can reach 70 ~ 100 ℃), electrical insulation, chemical stability is good, most of acid and alkali erosion, but not heat. Polyethylene is suitable for injection molding, blow molding, extrusion and other methods. PE can be divided according to density: LDPE LDPE; HDPE HDPE; Linear low density polyethylene LLDPE.
Polypropylene is propylene polymerization and thermoplastics, is usually colorless, transparent solid, odourless non-toxic, density of 0.90 ~ 0.919 g/cm, is the lightest of general plastic, its outstanding advantage is in the water boiling resistance characteristics, corrosion resistance, strength, rigidity and transparency are better than polyethylene, defect is low temperature impact resistance is poor, aging, but can be respectively through modification and adding additives to improve it.
Polypropylene is widely used because of its low price, good comprehensive performance and easy to process. In particular, the rapid development of polypropylene resin modification technology in recent years has made it widely used. Ordinary polypropylene can be expanded by copolymerization modification, crosslinking modification, grafting modification and other chemical modification methods and physical modification methods, which are comparable to engineering plastics in performance.
Polyvinyl chloride is a plastic made of vinyl chloride. By adding plasticizer, its hardness can be greatly changed. It is made of hard and soft products that have a wide range of USES. PVC in our country USES relatively large is the film class, such as the agricultural use shed film, the plastic cloth, the shed cloth, the packing material; It can be used in the construction industry, such as PVC doors and Windows, up and down pipes, etc. The transparent sheet of PVC is used for food packaging; PVC for artificial leather, making luggage, sofa and other furniture; Used for foaming products, such as sports shoes, automobile cushion, floor leather, wallpaper, etc. Mainly make sheath material in wire and cable.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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