Inner tube compositions having improved heat resistance...

Details Inner tube compositions having improved heat resistance... Inner tube compositions having improved heat resistance...

C - Chemistry, Metallurgy

08

F

C08F 8/20 (2006.01) B60C 1/00 (2006.01) B60C 5/02 (2006.01) C08L 23/28 (2006.01) C08L 21/00 (2006.01) C08L 23/22 (2006.01)

Patent

CA 2395434

Halogenated isobutylene-co-paramethylstyrene polymer, preferably brominated isobutylene-co-paramethylstyrene polymer (BIMS) and blends thereof, preferably blends of isobutylene based rubber, show improved heat resistance versus butyl inner tube compositions and retain the superior barrier properties of butyl inner tube compositions versus inner tube compositions with butyl/EP blends.

Selon l'invention, un polymère isobutylène-co-paraméthylstyrène halogéné, de préférence, un polymère isobutylène-co-paraméthylstyrène bromé et leurs mélanges, de préférence, des mélanges de caoutchouc à base d'isobutylène, présentent une résistance améliorée à la chaleur par opposition à des compositions de tube intérieur butyle et conservent des propriétés barrières supérieures des compositions de tube intérieur butyle par opposition à des compositions de tube intérieur avec des mélanges butyle/éthylène-propylène.

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