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The application of antioxidants
by：CSSSLD
2021-01-23
Phenolic antioxidants in general has the advantages of low toxicity, no discoloration, no pollution, is widely applied.
But the biggest drawback is that antioxidant efficiency is low.
In recent years, people in improving the efficiency of its antioxidant and toxicity to reduce a lot of fruitful work, engineering has developed a lot of hindered phenol, polyphenol and polymerization of phenol and other types of non-toxic, high temperature, high efficiency and resistance to degradation of new varieties -
Injection molding processing.
in the actual production, phenolic main antioxidants often used with peroxide decomposition agent, can improve the performance of products thermal oxidation, this kind of phenomenon belongs to the synergistic effect. So-called synergy, that is, when two or more antioxidants used, the total efficiency is greater than the sum of individual effectiveness when used alone. On the contrary, it is called a counter effect.
as the oil industry, the rapid development of rubber and plastic industry, the output of antioxidants are also increased year by year. People at the same time, along with the requirements of the agent against oxygen toxicity and pollution of the environment is becoming more and more strict, also prompted new antioxidant new products constantly emerging, development trend of the main is efficient, low toxic and nontoxic and more functional.
hindered phenolic antioxidant Lord and phosphite ester auxiliary antioxidant and use, has obvious synergistic effect, when hindered phenol with carbon black in PE, because of the carbon black can direct oxidation of phenol catalyzed and reduce its antioxidant ability, so their cooperate rather than to improve the antioxidant efficiency, reduce its instead, this is against the effect.
most antioxidants have an optimum concentration range. Within this range, with the increase of dosage of antioxidants, antioxidant efficiency increased to the maximum. More than this range will bring adverse effect, so it is very important to the proper dosage of antioxidant. Antioxidant dosage depends on the nature of the plastic, the efficiency of the antioxidant, synergistic effect, use conditions of the products and the cost price, and many other factors.
antioxidants in the application of plastic has two forms: one is in the process of polymerization of the resin added with a certain volume of antioxidants, such as PP and many polyolefin resin that is belong to this kind of situation. Commercial thermoplastics can satisfy the requirement of the general product molding and use. Another kind is to formula to join before processing products, to meet the requirements of products and high weather resistance against oxygen, such as a long-lived greenhouse film, bumper, etc.
plastic material structure determines his sensitive degree of oxygen in the atmosphere, unsaturated, branched chain more susceptible to oxidation, so should choose high antioxidant efficiency antioxidant, injection molding processing of high temperature heat is needed antioxidants, the use of high temperature, high mechanical strength requirements, selection of light intensity of products should be efficient and a variety of both has the effects of light stability.
more excellent articles: introduction of antioxidants, click directly.
http://www。 csssld。 cn//html/2018/Info_0127/723。 HTML
changshu smoothly da plastic products factory website: http://www. csssld。 Cn /
more wonderful articles, immediately search: changshu da plastic products factory smoothly
in the actual production, phenolic main antioxidants often used with peroxide decomposition agent, can improve the performance of products thermal oxidation, this kind of phenomenon belongs to the synergistic effect. So-called synergy, that is, when two or more antioxidants used, the total efficiency is greater than the sum of individual effectiveness when used alone. On the contrary, it is called a counter effect.
as the oil industry, the rapid development of rubber and plastic industry, the output of antioxidants are also increased year by year. People at the same time, along with the requirements of the agent against oxygen toxicity and pollution of the environment is becoming more and more strict, also prompted new antioxidant new products constantly emerging, development trend of the main is efficient, low toxic and nontoxic and more functional.
hindered phenolic antioxidant Lord and phosphite ester auxiliary antioxidant and use, has obvious synergistic effect, when hindered phenol with carbon black in PE, because of the carbon black can direct oxidation of phenol catalyzed and reduce its antioxidant ability, so their cooperate rather than to improve the antioxidant efficiency, reduce its instead, this is against the effect.
most antioxidants have an optimum concentration range. Within this range, with the increase of dosage of antioxidants, antioxidant efficiency increased to the maximum. More than this range will bring adverse effect, so it is very important to the proper dosage of antioxidant. Antioxidant dosage depends on the nature of the plastic, the efficiency of the antioxidant, synergistic effect, use conditions of the products and the cost price, and many other factors.
antioxidants in the application of plastic has two forms: one is in the process of polymerization of the resin added with a certain volume of antioxidants, such as PP and many polyolefin resin that is belong to this kind of situation. Commercial thermoplastics can satisfy the requirement of the general product molding and use. Another kind is to formula to join before processing products, to meet the requirements of products and high weather resistance against oxygen, such as a long-lived greenhouse film, bumper, etc.
plastic material structure determines his sensitive degree of oxygen in the atmosphere, unsaturated, branched chain more susceptible to oxidation, so should choose high antioxidant efficiency antioxidant, injection molding processing of high temperature heat is needed antioxidants, the use of high temperature, high mechanical strength requirements, selection of light intensity of products should be efficient and a variety of both has the effects of light stability.
more excellent articles: introduction of antioxidants, click directly.
http://www。 csssld。 cn//html/2018/Info_0127/723。 HTML
changshu smoothly da plastic products factory website: http://www. csssld。 Cn /
more wonderful articles, immediately search: changshu da plastic products factory smoothly
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