摘要:
A resin composition having excellent paint coatability containing (a) 50-80 weight % of a multi-stage polymerized propylene-ethylene block copolymer consisting essentially of (i) a propylene homopolymer portion, (ii) a propylene-ethylene random copolymer portion, and (iii) an ethylene homopolymer portion, (b) 20-40 weight % of an ethylene- alpha -olefin copolymer elastomer, and (c) 20 weight % or less of an inorganic filler, components in the components (a) and (b), which are soluble in p-xylene at a room temperature, having a number-average molecular weight of 4 x 10 or more and a weight-average molecular weight of 20 x 10 or more.
摘要:
A resin composition having excellent paint coatability comprising:
(A) 50-80 weight % of a multi-stage polymerized propylene-ethylene block copolymer consisting essentially of (i) a propylene homopolymer portion, (ii) a propylene-ethylene random copolymer portion, and (iii) an ethylene homopolymer portion, said propylene-ethylene block copolymer being characterized by the requirement that:
(a) said propylene-ethylene random copolymer portion (ii) has a number-average molecular weight of 20 X 40 4 or more and a weight-average molecular weight of 60 X 10 4 or more; (b) a content of ethylene is 60 weight % or more and a content of said ethylene homopolymer portion (iii) is 40 weight % or more, both based on the total amount (100 weight %) of said propylene-ethylene random copolymer portion (ii) and said ethylene homopolymer portion (iii); or (c) an intrinsic viscosity of said propylene homopolymer portion (i) is 0.9-1.2 dl/g, an intrinsic viscosity of said propylene-ethylene random copolymer portion (ii) is 4.0 dl/g or more, and an ethylene content of said propylene-ethylene random copolymer portion (ii) is 30-70 weight %;
(B) 20-40 weight % of an ethylene-α-olefin copolymer elastomer; and (C) up to 20 weight % of an inorganic filler.