TECHNOLOGY

Material

SBR (Styrene-Butadiene Rubber)

Styrene butadiene rubber (SBR)
  • SBR is also known as the styrene butadiene rubber. SBR synthetic rubber is made of 23.5% styrene and the rest of it is made of butadiene rubber. It is a copolymer made by mixing butadiene and styrene through emulsion polymerization at a low temperature, and it has excellent abrasion resistance and heat resistance, compared to natural rubber, and evenly distributed vulcanizing rate and stable scorch rate, and high machinability, thereby having the properties available for a wide use.
  • SBR is different from natural rubber and has an irregular molecular structure. Its characteristic is that it has a mixed structure such as vinyl bonds, and SBR is produced by organic macromolecule synthesis method, different from natural rubber, and thus its endurance and elasticity are much weaker than natural rubber. SBR synthesis is produced in two ways of low temperature and high temperature polymerizations.
Application
  • It is used in automotive tires, rubber waterproof clothes, sporting equipment, dustproof rubber, window frame rubber, high performance tires, mechanical parts, footwear and shoe soles, o-rings, seals and custom-molded rubber parts (hydraulic brake system seals and diaphragms), plumbing equipment, etc.
Property table of materials (ASTM D2000)

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Raw material name Hardness (±5) Tensile strength (kg/cm2) Elongation ratio (%) Commercial temperature (°C)
SBR 30 ~ 90 31 ~ 245 75 ~ 600 -35 ~ 90