Rubber composition for puncture-preventive sealant,...

C - Chemistry – Metallurgy – 09 – K

Patent

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Details

C09K 3/10 (2006.01) B29C 73/16 (2006.01) B29C 73/20 (2006.01) B29C 73/22 (2006.01) B29D 30/06 (2006.01) B60C 19/12 (2006.01)

Patent

CA 2458666

A sealant rubber composition which forms a spongy tacky sealant layer having moderate viscosity properties; and a pneumatic tire having in the tire main body a tacky sealant layer obtained by heating the rubber composition. The rubber composition comprises: 95 to 50 parts by weight of a polymer decomposable with a peroxide; 5 to 50 parts by weight of a polymer crosslinkable with a peroxide; and a peroxide, the amount which is 0.2 to 20 parts by weight per 100 parts by weight of these polymers.

La présente invention concerne une composition caoutchouteuse de pâte occlusive formant une couche occlusive spongieuse collante à viscosité modérée. L'invention concerne également un pneu où le corps principal comporte une couche de pâte occlusive collante obtenue par chauffage de la composition caoutchouteuse. Cette composition caoutchouteuse est constituée, pour 95 à 50 parties de sa masse d'un polymère se décomposant sous l'action d'un peroxyde, pour 5 à 50 parties de sa masse d'un polymère se réticulant sous l'action d'un peroxyde, et d'un peroxyde présent à raison de 0,2 à 20 parties de sa masse pour 100 parties de la masse de ces polymères.

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