Foamed rubber compositions for pneumatic tires and method of pro

Details Foamed rubber compositions for pneumatic tires and method of pro Foamed rubber compositions for pneumatic tires and method of pro

1996-03-27

1998-07-07

Cooney, Jr., John M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Cellular products or processes of preparing a cellular...

264 451, 264 453, 264 48, 521131, 521142, 521143, 521146, 521148, 521150, C08J 904

Patent

active

057769915

ABSTRACT:
A foamed rubber composition for pneumatic tires comprises at least one diene polymer as a rubber ingredient and includes closed cells in a matrix rubber, each of these cells being covered with a coat layer made from a given amount of a resin or resin composite having a JIS-C hardness of not less than 75, a particle size of 10-200 .mu.m and a reacted conjugate diene unit content of not less than 10% by weight. In the production of the foamed rubber composition, the melting point or glass transition point of the resin or resin composite is restricted to at least 5.degree. C. lower than the vulcanizing temperature.

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