the rubber products to prevent aging
First, the aging of rubber products
Aging is a rubber and other polymer materials in the existence of a more common phenomenon, it will deteriorate the performance of rubber, rubber products affect the use of value and service life, rubber protection system is to delay the aging of rubber to extend the service life of products. Rubber protection system is mainly antioxidant, anti-aging agent according to the principle of action can be divided into chemical antioxidant and physical antioxidant; according to the protection of the target is divided into antioxidants, ozone protection agent, light shielding agent, metal passivation agent, etc. Classification by chemical structure.
Different products in different conditions of use, the role of various factors vary, the aging situation is not the same. Even if the same product, due to the use of different seasons and regions, aging is also different. Therefore, the aging of rubber is caused by a variety of factors caused by a comprehensive chemical reaction. Among these factors, the most common and most important chemical factors are oxygen and ozone; physical factors are heat, light and mechanical stress. Generally, the aging of rubber products is the result of the interaction of one or more of them, the most common thermal oxygen aging, followed by ozone aging, fatigue aging and photo-oxygen aging.
Second, the rubber products to prevent aging
Rubber aging of the protective method: With the aging process of rubber, rubber performance gradually decreased, the use of value is gradually lost. Therefore, the study of aging and protection methods have a very important practical and economic significance. As the aging of rubber is a complex process of comprehensive chemical reaction, but also to prevent the occurrence of rubber aging is impossible. Therefore, only careful study of the causes of aging of rubber causes, and according to these reasons the right medicine, take appropriate measures to delay the aging of rubber, so as to achieve the purpose of extending the life of rubber. As the factors that cause the aging of the rubber products are different,
Therefore, according to different aging mechanism to take the appropriate anti-aging measures, mainly physical protection and chemical protection law. Physical protection law is to avoid the rubber and a variety of aging factors such as the use of rubber and plastic blends, surface coating or treatment, plus light shielding agent, plus paraffin and so on. Chemical protection law refers to the active addition of substances to prevent or delay the aging of rubber to continue, such as adding amine or phenolic chemical antioxidant.
Anti-aging is mainly from the reduction of vulcanized rubber polymer chain on the unsaturated chain of the main, for example, with a number of chain modification, the use of special chemical reactions, so that unsaturated bonds saturated, so that the molecular structure of the level to be improved Aging, delay aging and extend its service life.
Second, in the rubber, plastic and other processing process to add antioxidants, for example, in the vulcanized rubber formula to add UV stabilizer, anti-mildew agent, heat stabilizer, add to prevent ozone or oxygen caused by aging antioxidant.
Again, it can also be used to increase the physical protection of the coating and protective film, such as dipping anti-aging agent solution, painting, plating metal and so on.