Patent ID: 6348535
Filing Date: 2002-02-19
Classification: C08L,Y10T

Abstract:
A thermoplastic elastomer composition powder obtained by blending a pulverized product of a thermoplastic elastomer composition comprising 100 parts by weight of (a) and 10 to 250 parts by weight of (b) described below, and having a complex dynamic viscosity &eegr;* (1) of 1.5Ã—105 poise or less and a Newtonian viscosity index n of 0.67 or less, with 0.1 to 5 parts by weight of (c) and 0.1 to 5 parts by weight of (f) described below per 100 parts by weight of the pulverized product:(a): a polyolefin-based resin, (b): a rubbery polymer imparting a new single tan &dgr; peak at a temperature different from that of the tan &dgr; peak of (a) and that of the tan &dgr; peak of (b) within the range of âˆ’70 to 30Â° C. in a temperature dependence curve of tan &dgr; determined by solid viscoelasticity measurement of the composition obtained by kneading with (a), selected from the group consisting of a conjugated diene-based rubbery polymer and a hydrogenated product thereof, and a propylene-butene-based copolymer having a Shore A hardness measured according to ASTM D-2240 of 70 or less and an intrinsic viscosity [&eegr;]measured at 70Â° C. in xylene solvent of 0.3 dl/g or more, (c) a fine powder having a primary particle size of 5 to 150 nm, and (f) a powder having a primary particle diameter of more than 300 nm and not more than 10 &mgr;m.