MULTI-COMPONENT POLYMER RUBBER

摘要

A multi-component polymer rubber comprising (A) 15 to 60 mole % of an .alpha.,.beta.-unsaturated nitrile, (B) 10 to 75 mole % of a conjugated diene, and (C) 2 to 55 mole % of a fluoroalkyl acrylate or methacrylate or a fluorine-containing .alpha.-olefin, and having a glass transition temperature (Tg) of -50.degree.C to -20.degree.C, the percentages of the components (A), (B) and (C) being based on the total sum of moles of the components (A), (B) and (C). Said multi-component polymer rubber is excellent in sour gasoline resistance and alcohol-containing gasoline resistance.