Thermoplastic vulcanizates from isobutylene rubber and either EPDM or a conjugated diene rubber
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United States of America Patent
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Apr 15, 1997
Grant Date -
N/A
app pub date -
Nov 13, 1995
filing date -
Nov 13, 1995
priority date (Note) -
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Abstract
Thermoplastic vulcanizates from semicrystalline polyolefins and blends of crosslinked rubbers are disclosed. The blends are a mixture of at least two rubbers. One rubber is a copolymer predominantly of C.sub.4 to C.sub.7 isomonoolefins (e.g. isobutylene), along with optional monomers of conjugated dienes and/or p-alkylstyrene. This copolymer is optionally halogenated. The second rubber is ethylene/propylene rubber, natural rubber or a rubber polymerized predominantly from a conjugated diene. Such rubbers include polybutadiene, nitrile rubber, butadiene-styrene copolymers or combinations thereof.
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