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Styrene butadiene rubber

Styrene butadiene rubber

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Styrene butadiene rubber (SBR)

Typical specification

Item

Standard

Appearance

White or slightly yellow solid

Volatiles, %

0.9max

Ash, %

0.5max

Organic acid, %

4.50-6.75

Soap, %

0.5max

Bound styrene, %

22.5-24.5

Raw viscosity ML(1+4)100

44-56

Compound viscosity ML(1+4)100

93max

300% modulus 145°C 25min, MPa

15.5±2.5

300% modulus 145°C 35min, MPa

20.6±2.5

300% modulus 145°C 50min, MPa

21.5±2.5

Tensile strength 145°C 35min, MPa

24.5min

Elongation at break 145°C 35min, %

330b min