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The interaction of antioxidants
2018-1-10 11:29:55
The interaction of antioxidants
This paper introduces the interaction of antioxidants. The interaction of antioxidants includes synergistic effect and antagonistic effect.
Synergistic effect in the interaction of antioxidants. The synergistic effect of amines or phenolic antioxidants and peroxide decomposers has increased the resistance, oxidation and aging resistance of materials.
The synergistic effect includes the synergistic effect of the molecules and the synergistic effect of the molecules, and Scott et al. proposed the concept of uniform synergistic effect and non-uniform synergistic effect between the molecules. The uniform synergistic effect is the synergistic effect between two compounds with the same mechanism but different activity. The non-uniform synergistic effect is the synergistic effect between two or several different mechanisms. The synergy in the molecule is called self-synergism. It is a stabilizer that contains multiple functional groups and has a synergistic effect on each other.
When the phenolic antioxidant and sulfuric antioxidants are used, they have a higher long-term protection against oxidation than when they are used alone. Phosphorous antioxidants can be used to decompose hydrogen peroxide, which is mainly used as an antioxidant in processing. Due to the different processing temperature, the processing stability is different.
Processing in normal temperature (200 ℃) near phosphorus-containing antioxidants is used, under the condition of high temperature, phosphorus of phenolic antioxidants and antioxidant, phenolic antioxidants can capture hydrogen peroxide, makes the phosphorus-containing antioxidants is more stable, which showed a synergistic effect. For example, in the resistance to polyphenol antioxidant and organic phosphate, the number of free radicals has been greatly increased.
The antagonistic effect in the interaction of antioxidants. Some antioxidants are associated with harmful effects, known as antioxidant antagonists. Hindered amine is not compatible with thiodipropionate because it is alkaline and presents antagonistic effect. There are also antagonistic effects between polysulfide in vulcanized rubber and certain anti-aging agents.
ZhongFang amine and hindered alkyl phenol is effective composite antioxidants, but when they are added to the containing carbon black (ultraviolet screening agent) of polyethylene, is better than no adding carbon black polyethylene antioxidant performance is poor, the reason is that carbon black surface of amine or phenolic antioxidants have catalytic oxidation.
The total global consumption of antioxidants was about 350kt in 2006. By region, the asia-pacific region (excluding China) accounts for about 30%, Europe 25%, North America 25% and the rest 20%. According to the production capacity of the product structure, the phenolic antioxidant is about 50%, and phosphatide is 35% and the other 15%. The average annual growth rate of global antioxidant market will reach 5% in 2007-2010, and the consumption will reach 426kt/a.
Over the past few years, antioxidant production of the world's annual growth rate of about 5.5%, and the phosphate ester antioxidant production year growth rate of about 7%, its development speed is in the leading position in the field of antioxidants.
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.
As demand in Asia has grown rapidly in recent years, anti-oxidant companies in the United States and Western Europe have accelerated their shift to Asia. According to statistics, in 2005, the production of antioxidants in Asia accounted for about 50% of the global total, and by 2010, the proportion of Chinese antioxidants in the world will increase from 7% in 2005 to more than 15%. At present, the production of antioxidants in Asia mainly focuses on China, South Korea, Taiwan and Japan.
In recent years, with the rapid growth of plastic production capacity and production, the production and consumption of antioxidants in China have been stimulated and driven accordingly. Statistics show that the total production of plastic products in China exceeded 20 million t for the first time in 2005, reaching 2198.555 million t.
, 2005-2010, the average annual growth rate of consumption of about 10% of China polyolefin, therefore in the next few years and the matching processing and application of polyolefin plastics antioxidants demand growth will remain at around 10%, in 2010 China's demand for plastic antioxidants will reach about 74 kt/a, this to the development of antioxidant provides a good market prospect.
At present, there are more than 50 kinds of antioxidant varieties in China, mainly BHT, 1010, 1076, 168, DLTP, 2246, 4226, 3114, 246, DSTDP, etc., and the total production capacity in 2006 is about 50kt/a. The consumption structure was roughly 60% of the total consumption of the blocked phenol, about 27% of the phosphoesters, about 7% of thioesters, and about 6% of the others.
In our country, the antioxidant industry has also developed many new varieties with excellent performance, such as high hydrolysis stability and high heat resistance of bisphenol phosphite. The high effective calcium salt antioxidant 1425 was found in the higher molecular weight. In the chemical crosslinked cable, the antioxidant 1010 is substituted for the antioxidant 1035.
Antioxidant is a kind of chemicals, and when its only a small amount of the polymer system to exist, can be slow or inhibit the oxidation process of polymer, polymer to prevent aging and prolong its service life, also known as the "stabilizer".
For engineering plastics processing, antioxidants can prevent the thermal oxidation degradation of certain polymers (such as ABS), so that the forming process can be carried out smoothly. The amount of antioxidants is only 0.1-0.5.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
This paper introduces the interaction of antioxidants. The interaction of antioxidants includes synergistic effect and antagonistic effect.
Synergistic effect in the interaction of antioxidants. The synergistic effect of amines or phenolic antioxidants and peroxide decomposers has increased the resistance, oxidation and aging resistance of materials.
The synergistic effect includes the synergistic effect of the molecules and the synergistic effect of the molecules, and Scott et al. proposed the concept of uniform synergistic effect and non-uniform synergistic effect between the molecules. The uniform synergistic effect is the synergistic effect between two compounds with the same mechanism but different activity. The non-uniform synergistic effect is the synergistic effect between two or several different mechanisms. The synergy in the molecule is called self-synergism. It is a stabilizer that contains multiple functional groups and has a synergistic effect on each other.
When the phenolic antioxidant and sulfuric antioxidants are used, they have a higher long-term protection against oxidation than when they are used alone. Phosphorous antioxidants can be used to decompose hydrogen peroxide, which is mainly used as an antioxidant in processing. Due to the different processing temperature, the processing stability is different.
Processing in normal temperature (200 ℃) near phosphorus-containing antioxidants is used, under the condition of high temperature, phosphorus of phenolic antioxidants and antioxidant, phenolic antioxidants can capture hydrogen peroxide, makes the phosphorus-containing antioxidants is more stable, which showed a synergistic effect. For example, in the resistance to polyphenol antioxidant and organic phosphate, the number of free radicals has been greatly increased.
The antagonistic effect in the interaction of antioxidants. Some antioxidants are associated with harmful effects, known as antioxidant antagonists. Hindered amine is not compatible with thiodipropionate because it is alkaline and presents antagonistic effect. There are also antagonistic effects between polysulfide in vulcanized rubber and certain anti-aging agents.
ZhongFang amine and hindered alkyl phenol is effective composite antioxidants, but when they are added to the containing carbon black (ultraviolet screening agent) of polyethylene, is better than no adding carbon black polyethylene antioxidant performance is poor, the reason is that carbon black surface of amine or phenolic antioxidants have catalytic oxidation.
The total global consumption of antioxidants was about 350kt in 2006. By region, the asia-pacific region (excluding China) accounts for about 30%, Europe 25%, North America 25% and the rest 20%. According to the production capacity of the product structure, the phenolic antioxidant is about 50%, and phosphatide is 35% and the other 15%. The average annual growth rate of global antioxidant market will reach 5% in 2007-2010, and the consumption will reach 426kt/a.
Over the past few years, antioxidant production of the world's annual growth rate of about 5.5%, and the phosphate ester antioxidant production year growth rate of about 7%, its development speed is in the leading position in the field of antioxidants.
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.
As demand in Asia has grown rapidly in recent years, anti-oxidant companies in the United States and Western Europe have accelerated their shift to Asia. According to statistics, in 2005, the production of antioxidants in Asia accounted for about 50% of the global total, and by 2010, the proportion of Chinese antioxidants in the world will increase from 7% in 2005 to more than 15%. At present, the production of antioxidants in Asia mainly focuses on China, South Korea, Taiwan and Japan.
In recent years, with the rapid growth of plastic production capacity and production, the production and consumption of antioxidants in China have been stimulated and driven accordingly. Statistics show that the total production of plastic products in China exceeded 20 million t for the first time in 2005, reaching 2198.555 million t.
, 2005-2010, the average annual growth rate of consumption of about 10% of China polyolefin, therefore in the next few years and the matching processing and application of polyolefin plastics antioxidants demand growth will remain at around 10%, in 2010 China's demand for plastic antioxidants will reach about 74 kt/a, this to the development of antioxidant provides a good market prospect.
At present, there are more than 50 kinds of antioxidant varieties in China, mainly BHT, 1010, 1076, 168, DLTP, 2246, 4226, 3114, 246, DSTDP, etc., and the total production capacity in 2006 is about 50kt/a. The consumption structure was roughly 60% of the total consumption of the blocked phenol, about 27% of the phosphoesters, about 7% of thioesters, and about 6% of the others.
In our country, the antioxidant industry has also developed many new varieties with excellent performance, such as high hydrolysis stability and high heat resistance of bisphenol phosphite. The high effective calcium salt antioxidant 1425 was found in the higher molecular weight. In the chemical crosslinked cable, the antioxidant 1010 is substituted for the antioxidant 1035.
Antioxidant is a kind of chemicals, and when its only a small amount of the polymer system to exist, can be slow or inhibit the oxidation process of polymer, polymer to prevent aging and prolong its service life, also known as the "stabilizer".
For engineering plastics processing, antioxidants can prevent the thermal oxidation degradation of certain polymers (such as ABS), so that the forming process can be carried out smoothly. The amount of antioxidants is only 0.1-0.5.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
http://www.yaruichem.com
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