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AssigneeSumitomo Chemical Company, Limited
InventorsTadashi Hikasa, Hiroaki Mendori, Tatsuo Hamanaka, Toshio Igarashi, Yuu Shida
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A thermoplastic elastomer powder for powder molding, comprising an elastomer composition of an ethylene-.alpha.-olefin copolymer rubber and a polyolefin resin, wherein said elastomer composition has a complex dynamic viscosity .eta.*(1) as measured at frequency of 1 radian/sec. in dynamic viscoelasticity measurement at 250.degree. C., of 1.5.times.10.sup.5 poise or less, a Newtonian viscosity index n calculated from the following formula by using the complex dynamic viscosity .eta.*(1) at a frequency of 1 radian/sec. and the complex dynamic viscosity .eta.*(100) at a frequency of 100 radian/sec. of 0.67 or less, and a hardness (shore D) of 45 or less: n={log.eta.*(1)-log.eta.*(100)}/2.
A thermoplastic elastomer powder for powder molding, comprising a partially crosslinked type elastomer composition comprising a mixture of an ethylene-.alpha.-olefin copolymer rubber and a polyolefin ethylene resin dynamically crosslinked in the presence of a crosslinking agent, wherein said elastomer composition has a complex dynamic viscosity .eta.*(1) as measured at frequency of 1 radian/sec. in dynamic viscoelasticity measurement at 250.degree. C., of 1.5.times.10.sup.5 poise or less, a Newtonian viscosity index n calculated from the following formula by using the complex dynamic viscosity .eta.*(1) at a frequency of 1 radian/sec. and the complex dynamic viscosity .eta.*(100) at a frequency of 100 radian/sec. of 0.67 or less, and a hardness (shore D) of 45 or less:
Dependencies are inferred from the claim text.