Self sealing vehicle tire and butyl rubber sealant composition

Details Self sealing vehicle tire and butyl rubber sealant composition Self sealing vehicle tire and butyl rubber sealant composition

C - Chemistry, Metallurgy

08

L

117/200, 400/304

C08L 9/00 (2006.01) B60C 5/14 (2006.01) C08K 3/04 (2006.01) B60C 21/08 (1980.01)

Patent

CA 1083288

Abstract of the Disclosure A vehicle tire is disclosed having an internal circumferential layer of self-sealing composition on an internal surface, particularly behind the tire tread. The sealant layer is initially made up of the combination of specific quantities of high molecular weight curable butyl rubber, a low molecular weight curable butyl rubber, a liquid polybutylene tackifier, carbon black, suitable curing agents for the butyl rubber components, and optionally a partially hydrogenated block copolymer of styrene and a conjugated diene. When cured, this sealant layer effectively heals most punctures one-quarter inch in diameter or less in a vehicle tire at temperatures over the range of about -20° F. to 270° F. without significant loss of air.

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