Thermoplastic materials

Claim 1

A thermoplastic material which comprises: (a) 100 parts by weight of polyolefin elastomer; (b) 15-100 parts by weight of a crystalline or partially crystalline polyolefin; (c) 30-240 parts by weight of chalk, siliceous chalk, or a mixture thereof; and (d) 0.5-20 parts by weight of titanium dioxide, and which is light colored, and wherein the polyolefin elastomer is a saturated elastomer consisting of 15-90% of ethylene and 85-10% of propylene, butene-1 or mixtures thereof; or an unsaturated elastomer consisting of ethylene in combination with propylene, butene-1 or mixtures thereof, in a ratio of from 15/85 to 90/10, respectively, and an amount of a multiple olefin sufficient to provide from 0.5 to 30 double bonds per 1000 carbon atoms of the elastomer; and wherein the crystalline or partially crystalline polyolefin is polyethylene or a copolymer thereof with an α-olefin having a density of 0.910-0.975 g/cc, an RSV value of 0.5-3.3 dl/g and a melt index of 0.2-50 g/10 min; a homo- or copolymer, wit an α-olefin, or propylene having a density of 0.90-0.910 g/cc, an RSV value of 1.0-10 dl/g and a melt index of 0.1-50 g/10 min; or a homo- or copolymer, with an α-olefin of butene-1 having a density of 0.910-0.925 g/cc, an RSV value of 1.0-10 dl/g and a melt index of 0.1-100 g/10 min.