Polyolefin composition for exterior trims

摘要

A shaped article for use in exterior trims such as an automotive bumper, which has sufficiently good properties in mechanical strength, stiffness, surface hardness, heat resistance, impact strength as well as a good adhesive strength to a coating film, is made from a polyolefin composition comprising: (a) 50 to 70 parts by weight of a crystalline propylene-ethylene copolymer having an ethylene content of 2 to 30 weight %; (b) 5 to 25 parts by weight of an ethylene-propylene copolymer rubber having a Mooney viscosity ML1+4 of 20 to 70 at 100 DEG C and a propylene content of 22 to 27 weight %; (c) 1 to 25 parts by weight of a very-low-density polyethylene having a density of 0.91 g/cm<3> or lower, a melt flow rate of 0.3 to 10 g/10 min determined at 230 DEG C under a load of 2.16 kgf and a melting point of 100 DEG C or higher; and (d) 5 to 25 parts by weight of talc; a total amount of the component (b) and the component (c) being 40 parts by weight or less.