General-purpose rubber has better comprehensive performance and is widely used. There are:

①Natural rubber is made from the latex of Hevea brasiliensis, and its basic chemical composition is cis-polyisoprene. Good elasticity, high strength and good comprehensive performance.

② Isoprene rubber, whose full name is cis-1,4-polyisoprene rubber, is a high-cis synthetic rubber made from isoprene. Because its structure and performance are similar to natural rubber, it is also called synthetic natural. rubber.

③ SBR, referred to as SBR, is made by copolymerizing butadiene and styrene. According to the production method, it is divided into emulsion polymerized styrene-butadiene rubber and solution polymerized styrene-butadiene rubber. Its comprehensive performance and chemical stability are good.

④ Butadiene rubber, whose full name is cis-1,4-polybutadiene rubber, referred to as BR, is obtained by polymerizing butadiene. Compared with other general-purpose rubbers, vulcanized butadiene rubber is particularly excellent in cold resistance, abrasion resistance and elasticity, less heat generation under dynamic load, good aging resistance, and easy to use with natural rubber, neoprene, nitrile rubber, etc. .

⑤ Neoprene, referred to as CR, is obtained by polymerizing chloroprene. Has good comprehensive properties, oil resistance, flame resistance, oxidation resistance and ozone resistance. However, its density is large, it is easy to crystallize and harden at normal temperature, and it has poor storage and poor cold resistance.