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

1998-04-28

1999-10-19

Cooney, Jr., John M.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 453, 264 48, 521 99, 521131, 521142, 521143, 521146, 521148, 521150, C08J 904

Patent

active

059684275

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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