Methods for the preparation of butyl graft copolymers
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United States of America Patent
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Dec 8, 2009
Grant Date -
Mar 1, 2007
app pub date -
Aug 17, 2006
filing date -
Aug 26, 2005
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Abstract
Preparation of butyl rubber based graft co-polymers from halobutyl elastomers using phase transfer catalysts in the presence of a solution of an alkali metal salt of an oxygen or sulfur nucleophile that is bound to a polymeric substrate. Graft co-polymers can be produced of a butyl polymer (isobutene-co-isoprene) and polymeric substrates such as polyethylene, polypropylene, polystyrene, polybutadiene, polysilanes, polysiloxanes, polyethylene glycol, polyethylene oxide, polyphosphazenes, polyferrocenes or their hybrids.
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