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Plastics use antioxidants
2018-1-10 11:30:02
Plastics use antioxidants
There are four types of anti-oxidants for plastics used in domestic production and consumption: blocked phenol, phosphatide, thiotype and composite. For plastics in China in the 1950 s developed single phenolic antioxidants hindered phenol butylated hydroxytoluene, 60 s developed thio ester antioxidant DLTDP, DSTDP, developed in the seventy s polyphenols hindered phenol antioxidant 1010 and 1076, developed in the eighty s and the phosphate ester antioxidant 168 and antioxidant 215, 225, etc.
In 1982, the total consumption of plastic antioxidant in China was less than 1000 tons. In 2004, domestic plastic antioxidant production and consumption exceeded 30,000 tons, which was close to the consumption in the late 1990s in the United States and Western Europe. The product variety and product quality of domestic plastic antioxidant can meet the needs of domestic petrochemical and plastics industry, and the main antioxidant varieties are exported every year.
The inhibiting phenol antioxidant is a kind of antioxidant, which is divided into single phenol, bisphenol, polyphenol and nitrogen heterocyclic polyphenol by molecular structure. Single and double phenolic antioxidants such as butylated hydroxytoluene, 2246, bisphenol A and other products, because of the low molecular weight, volatile and greater mobility, easy to make plastic coloring, in recent years in substantial decrease in the consumption of plastic.
Polyphenols antioxidant 1010 and 1076 is the foreign and domestic plastics antioxidants leading products, 1010 with high molecular weight and good compatibility with plastic material, excellent antioxidant effect, consumption is the largest and become the most outstanding product plastic antioxidants. Domestic production consumption of 1010 and 1076 accounts for about 60% of the total domestic consumption of antioxidants.
Domestic nitrogen heterocyclic polyphenol antioxidants main varieties of 3114311 4 melting point is 220 ℃, is the domestic production of the highest melting point of antioxidant products. Because 3114 molecules contain triazine structure, 3114 products also have a certain light stabilizing effect.
The production consumption of domestic phosphatide antioxidant is about 30% of the total domestic consumption of antioxidants. Antioxidant 168, 3 (2, 4-2 tertiary butyl phenyl) phosphite ester, is the domestic production and consumption is second only to the antioxidant 1010 varieties, most domestic manufacturer of 1010 and 1076 also production of antioxidant 168, estimates that domestic production more than 10000 tons in 2004.
Antioxidant 626, double (2,4-2 tert-butyl phenyl) pentaerythritol diphosphatate; Antioxidant 618, double (octadecyl) pentaerythritol diphosphatate. 626 and 618 are mainly sold with other main and auxiliary antioxidants. 626 has already formed a certain scale of production and sales in China, about 200 tons in 2004.
Anti-oxidant TNP, 3 (nonylphenyl) phosphoric acid ester. TNP is one of the few liquid antioxidants in the plastic antioxidant variety. It is the largest liquid antioxidant product in domestic production and consumption. Due to the increasing quality of domestic TNP products and increasing production capacity, the domestic TNP has been dominant in the domestic TNP consumer market.
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.
The sulfur-containing antioxidants in domestic production can be divided into three varieties: thioester antioxidant, thio-biphenol antioxidant and thio-phenolic antioxidant.
There are two main products of domestic thioester antioxidants: dipropionate (dipropionate)? DLTP or DLTDP dipropionate ii (octadecanol)? DSTP or DSTDP was used to synthesize dipropionic acid, and then the esterification of dipropionic acid and high carbon alcohol. Dimethyl dipropionate was synthesized by the synthesis of dimethyl dipropionate and dimethyl dipropionate and high-carb. In 2004, DLTP and DSTP produced about 1200 tons.
Glucosinolates bisphenol containing hindered phenol antioxidant molecules in structure, in plastic material showed high antioxidant performance, thermal performance is good, usually will be divided into the double phenolic antioxidants and hindered phenol antioxidant types of Lord. The main products are 300, 4,4 - thio (6 - tert-butyl - 3 - methyl phenol), mainly used in crosslinked polyethylene wire and cable and other plastic materials.
In the past two years, in addition to wire and cable, crosslinked polyethylene has been used to increase the consumption of heat-resistant pipes and heat-shrinkable tubes, and the consumption of 300 in China has also increased significantly. In 2004, the production volume was about 150 tons. Domestic sulfide phenolic antioxidant products are 1035, 2,2? - thioglycol (3-3 - (3, 5-2 tert-butyl - 4 - hydroxy phenyl). A raw material to produce 1035 is the common intermediates of 1010, 1076, 3, 5 - methyl ester, and another kind of raw material is the key material of chemical weapons - sulfur diethylene glycol, so the 1035 has a certain application market in foreign countries.
Domestic main varieties such as composite antioxidant 1010 and 168 according to the different weight proportion of compound antioxidant 215225561107 6 and 168 composite antioxidant 900, including 215, 225, two varieties of production and consumption of domestic composite antioxidant production more than 80% of the total consumption.
The production enterprises have developed and developed several compound antioxidant formulations or varieties, and the application effect of the products has been recognized by the petrochemical and plastics industries.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
There are four types of anti-oxidants for plastics used in domestic production and consumption: blocked phenol, phosphatide, thiotype and composite. For plastics in China in the 1950 s developed single phenolic antioxidants hindered phenol butylated hydroxytoluene, 60 s developed thio ester antioxidant DLTDP, DSTDP, developed in the seventy s polyphenols hindered phenol antioxidant 1010 and 1076, developed in the eighty s and the phosphate ester antioxidant 168 and antioxidant 215, 225, etc.
In 1982, the total consumption of plastic antioxidant in China was less than 1000 tons. In 2004, domestic plastic antioxidant production and consumption exceeded 30,000 tons, which was close to the consumption in the late 1990s in the United States and Western Europe. The product variety and product quality of domestic plastic antioxidant can meet the needs of domestic petrochemical and plastics industry, and the main antioxidant varieties are exported every year.
The inhibiting phenol antioxidant is a kind of antioxidant, which is divided into single phenol, bisphenol, polyphenol and nitrogen heterocyclic polyphenol by molecular structure. Single and double phenolic antioxidants such as butylated hydroxytoluene, 2246, bisphenol A and other products, because of the low molecular weight, volatile and greater mobility, easy to make plastic coloring, in recent years in substantial decrease in the consumption of plastic.
Polyphenols antioxidant 1010 and 1076 is the foreign and domestic plastics antioxidants leading products, 1010 with high molecular weight and good compatibility with plastic material, excellent antioxidant effect, consumption is the largest and become the most outstanding product plastic antioxidants. Domestic production consumption of 1010 and 1076 accounts for about 60% of the total domestic consumption of antioxidants.
Domestic nitrogen heterocyclic polyphenol antioxidants main varieties of 3114311 4 melting point is 220 ℃, is the domestic production of the highest melting point of antioxidant products. Because 3114 molecules contain triazine structure, 3114 products also have a certain light stabilizing effect.
The production consumption of domestic phosphatide antioxidant is about 30% of the total domestic consumption of antioxidants. Antioxidant 168, 3 (2, 4-2 tertiary butyl phenyl) phosphite ester, is the domestic production and consumption is second only to the antioxidant 1010 varieties, most domestic manufacturer of 1010 and 1076 also production of antioxidant 168, estimates that domestic production more than 10000 tons in 2004.
Antioxidant 626, double (2,4-2 tert-butyl phenyl) pentaerythritol diphosphatate; Antioxidant 618, double (octadecyl) pentaerythritol diphosphatate. 626 and 618 are mainly sold with other main and auxiliary antioxidants. 626 has already formed a certain scale of production and sales in China, about 200 tons in 2004.
Anti-oxidant TNP, 3 (nonylphenyl) phosphoric acid ester. TNP is one of the few liquid antioxidants in the plastic antioxidant variety. It is the largest liquid antioxidant product in domestic production and consumption. Due to the increasing quality of domestic TNP products and increasing production capacity, the domestic TNP has been dominant in the domestic TNP consumer market.
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.
The sulfur-containing antioxidants in domestic production can be divided into three varieties: thioester antioxidant, thio-biphenol antioxidant and thio-phenolic antioxidant.
There are two main products of domestic thioester antioxidants: dipropionate (dipropionate)? DLTP or DLTDP dipropionate ii (octadecanol)? DSTP or DSTDP was used to synthesize dipropionic acid, and then the esterification of dipropionic acid and high carbon alcohol. Dimethyl dipropionate was synthesized by the synthesis of dimethyl dipropionate and dimethyl dipropionate and high-carb. In 2004, DLTP and DSTP produced about 1200 tons.
Glucosinolates bisphenol containing hindered phenol antioxidant molecules in structure, in plastic material showed high antioxidant performance, thermal performance is good, usually will be divided into the double phenolic antioxidants and hindered phenol antioxidant types of Lord. The main products are 300, 4,4 - thio (6 - tert-butyl - 3 - methyl phenol), mainly used in crosslinked polyethylene wire and cable and other plastic materials.
In the past two years, in addition to wire and cable, crosslinked polyethylene has been used to increase the consumption of heat-resistant pipes and heat-shrinkable tubes, and the consumption of 300 in China has also increased significantly. In 2004, the production volume was about 150 tons. Domestic sulfide phenolic antioxidant products are 1035, 2,2? - thioglycol (3-3 - (3, 5-2 tert-butyl - 4 - hydroxy phenyl). A raw material to produce 1035 is the common intermediates of 1010, 1076, 3, 5 - methyl ester, and another kind of raw material is the key material of chemical weapons - sulfur diethylene glycol, so the 1035 has a certain application market in foreign countries.
Domestic main varieties such as composite antioxidant 1010 and 168 according to the different weight proportion of compound antioxidant 215225561107 6 and 168 composite antioxidant 900, including 215, 225, two varieties of production and consumption of domestic composite antioxidant production more than 80% of the total consumption.
The production enterprises have developed and developed several compound antioxidant formulations or varieties, and the application effect of the products has been recognized by the petrochemical and plastics industries.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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