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US 6,150,464 AGranted
Preferred process for silicon hydride addition and preferred degree of polymerization for silicon hydride for thermoplastic vulcanizates
AssigneeAdvanced Elastomer Systems, L.P.
InventorsRobert E. Medsker, Jianqun Zhao, Gary W. Gilbertson, Kuo-Shein Shen, Donald Wang
Life of this patent
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Abstract
An improved process for the preparation of thermoplastic elastomers by hydrosilylation crosslinking, in which a hydrosilylation crosslinking agent with a low degree of polymerization and/or a hydrosilylation crosslinking agent diluted in oil is used.
Claims6
A thermoplastic vulcanizate comprising,
- a) a thermoplastic resin blended with a crosslinked rubber,
- b) optionally fillers, extender oils, and plasticizers,
- c) wherein said crosslinked rubber comprises crosslinks which are the reaction product of a hydrosilylation crosslinking agent having a degree of polymerization of about 2 to about 20 reacted with residual unsaturated carbon to carbon double bonds in said rubber in the presence of a hydrosilylation catalyst, and wherein the crosslinking agent has been introduced into said vulcanizate in the form of an about 20 to about 80 weight percent solution of said agent in oil.
Dependencies are inferred from the claim text.