Processability of silica-filled rubber stocks
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United States of America Patent
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May 7, 2002
Grant Date -
Feb 28, 2002
app pub date -
Sep 24, 2001
filing date -
Jul 11, 1997
priority date (Note) -
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status (Latency Note)
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Abstract
A processable rubber stock is produced by the preparation of a silica-filled, vulcanized elastomeric compound comprising mixing an elastomer with an amorphous silica filler, from 0 to less than about 1% by weight based on said silica filler of bis[3-(triethoxysilyl)propyl]tetrasulfide, an alkylalloxysilane and a cure agent. A further processing aid comprising at least one of an ester of a fatty acid or an ester of a polyol is preferred. The elastomer is preferably a diene monomer homopolymer or a copolymer of at least one diene and at least one monovinyl aromatic monomer. By effecting vulcanization, a vulcanized elastomeric compound is produced containing good physical properties for use as tread stock for a pneumatic tire.
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