Halogenated isobutylene-based copolymers having enhanced...

Details Halogenated isobutylene-based copolymers having enhanced... Halogenated isobutylene-based copolymers having enhanced...

C - Chemistry, Metallurgy

08

K

C08K 9/00 (2006.01) C08C 19/12 (2006.01) C08F 12/08 (2006.01) C08F 112/08 (2006.01) C08F 212/08 (2006.01) C08K 9/04 (2006.01) C08L 23/22 (2006.01) C08L 21/00 (2006.01) C08L 101/00 (2006.01)

Patent

CA 2449072

The invention provides a method for increasing the viscosity of halogenated (brominated) elastomeric copolymers of a C4 to C7 isomonoolefin (isobutylene) and a para-alkylstryrene (p-methylstyrene) by mixing the copolymer with a silica or clay particulate filler which has been contacted with an aminosilane containing at least one C1 to C4 alkoxy group and at least one primary, secondary or tertiary amine group. The resulting elastomer compositions are used to prepare thermoplastic elastomer blend compositions, containing more finely dispersed elastomers which results in compositions having improved mechanical properties.

La présente invention concerne un procédé permettant d'augmenter la viscosité de copolymères élastomères halogénés (bromés) d'une isomono-oléfine en C¿4? à C¿7? (isobutylène) et d'un para-alkylstyrène (p-méthylstyrène) par le mélange de ce copolymère avec un liant particulaire de silice ou d'argile qui a été mis en contact avec un aminosilane contenant au moins un groupe alcoxy en C¿1? à C¿4? et au moins un groupe amine primaire, secondaire ou tertiaire. On utilise les compositions élastomères résultantes pour préparer des compositions thermoplastiques de mélange élastomère contenant des élastomères finement dispersés qui donnent des compositions aux propriétés mécaniques améliorées.

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