Patent ID: 6069202
Filing Date: 2000-05-30
Classification: C08L

Abstract:
A thermoplastic vulcanizate made by dynamic vulcanization, comprising:a) a polar thermoplastic phase comprising polyamide, or block copolymer thereof or a mixture thereof, optionally endcapped;b) a first olefinic rubbery polymer being either 1) an ethylene rubbery polymer having from about 50 to 75 weight percent repeat units from ethylene and residual repeat units from at least one different monomer, and including at least one carboxylic acid, epoxy, hydroxyl or amine group or a pendant group which is an anhydride of two carboxylic acid groups with the proviso that if carboxylic acid groups are present they are present at a concentration from about 0.1 to about 5 mole percent of the repeating units of said first olefinic rubbery polymer; or 2) a diene based rubbery polymer selected from natural rubber or a polymer having at least 50 weight percent repeat units from at least one conjugated diene, said diene based rubbery polymer including at least one epoxy group; or combinations of said ethylene rubbery polymer and diene based rubbery polymer; andc) a crosslinked halogenated rubbery copolymer of paraalkylstyrene and a isomonoolefin of 4 to 7 carbon atoms.