Arborescent thermoplastic elastomers and products therefrom
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United States of America Patent
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Jun 8, 2004
Grant Date -
Apr 3, 2003
app pub date -
May 29, 2002
filing date -
May 29, 2001
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Expired
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Abstract
The present invention provides highly branched block copolymers comprising branched soft segments with a low glass-transition temperature (T.sub.g) and hard segments with a high T.sub.g or crystalline melting point that exhibit thermoplastic elastomeric properties. More particularly the invention provides a highly branched block copolymer of a polyisoolefin and a polymonovinylidene arene characterized by having thermoplastic elastomeric properties wherein the aforesaid block copolymer comprises a highly branched polyisoolefin block and some of the branches of the aforesaid polyisoolefin block terminate in polymonovinylidene arene endblocks.
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