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Halogenated terpolymers of isobutylene, diolefin monomer and styrenic monomer.

U.S. patent: 7,402,633

Issued: July 22, 2008

Inventor: Gabor Kaszas

Assigned: Lanxess

Key statement: A halogenated butyl polymer having improved properties, the butyl polymer derived from a monomer mixture comprising a [C.sub.4] to [C.sub.8] monoolefin monomer, a [C.sub.4] to [C.sub.14] multiolefin monomer and a styrenic monomer with a catalyst system to produce the butyl polymer. The improved properties include faster cure, higher maximum torque, higher delta torque, relatively stable modulus over time, improved hot air aging properties and improved aged flexure properties. These improved properties are believed to result from direct interaction between the styrenic moieties in the polymer backbone with a crosslinking agent added to vulcanize the halogenated butyl rubber.
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Title Annotation:Patent News
Publication:Rubber World
Date:Aug 1, 2008
Previous Article:Enhanced electrical cables.
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