Butyl rubber is a kind of synthetic rubber. It is synthesized from isobutylene and a small amount of isoprene. It is a copolymer of isobutylene and isoprene.
Air tightness. It also has heat resistance, ozone resistance, aging resistance, chemical resistance, shock absorption, and electrical insulation properties. Good resistance to sunlight and ozone, can be exposed to animal or vegetable oils or oxidizable chemicals.
The disadvantages of butyl rubber include:
First, the vulcanization speed is slow. Compared with highly unsaturated rubbers such as natural rubber, its vulcanization speed is about 3 times slower, which requires high temperature or long-term vulcanization;
Second, the mutual adhesion is poor, and the adhesion with other rubbers must be improved by means of tackifiers and tackifiers, and the adhesion is low;
Third, it has poor compatibility with other rubbers, and generally can only be used with ethylene-propylene rubber and polyethylene;
Fourth, the interaction with the reinforcing agent is weak. Compared with the unsaturated rubber, the interaction between the butyl rubber and the reinforcing agent is weak. It is necessary to perform heat treatment or use additives to increase the reinforcing effect of the rubber and improve the stretching. Strength, tensile stress, elasticity, abrasion resistance and electrical insulation performance.
It is used to make inner tubes of various tires, inner liners of tubeless tires, and various sealing gaskets. It is used as liners, pipes and conveyor belts for corrosive liquid containers in the chemical industry.
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