| abstract |
(57) Abstract: The present invention is a thermoplastic elastomer composition comprising a branched olefin copolymer derived from an olefinically unsaturated monomer capable of insertion polymerization, wherein the copolymer is A) measured at 10 ° C or less by DSC. A composition having a Tg, B) a Tm greater than 80 ° C., C) an elongation at break of 300% or more, D) a tensile strength of 1500 psi (10,300 kPa) or more, and E) an elastic recovery of 50% or more. About things. The present invention also relates to a process for producing the composition according to the invention, wherein A) ethylene or propylene, and optionally one or more copolymerizable monomers, with a chain end group unsaturation higher than 40%. B) copolymerizing in a copolymerization reaction under conditions sufficient to have, and B) copolymerizing the product of A) with ethylene and one or more copolymerizable monomers to produce said branched olefin copolymer. A method comprising: The branched olefin copolymer compositions of the present invention are suitable as a replacement for styrene block copolymer compositions and are suitable for conventional thermoplastic elastomer applications. |