Propylene-ethylene copolymer resin composition and moulded article, film and sheet thereof

摘要

A propylene-ethylene copolymer resin composition including: 97 to 65 parts by weight of a propylene polymer (A) produced with a metallocene catalyst and 3 to 35 parts by weight of a propylene-ethylene copolymer (B). The copolymer (B) includes: 65 to 95% by weight of a propylene polymer component (B1) and 5 to 35% by weight of a propylene-ethylene copolymer component (B2).

主权项

1. A propylene-ethylene copolymer resin composition comprising, based on 100 parts by weight of the sum of the following (A) and (B): 97 to 65 parts by weight of a propylene polymer (A) produced with a metallocene catalyst and having the following properties (A-i) to (A-iii); and 3 to 35 parts by weight of a propylene-ethylene copolymer (B) having the following properties (B-i) to (B-ii), wherein
the propylene-ethylene copolymer (B) comprises, based on 100% by weight of the sum of (B1) and (B2): 65 to 95% by weight of a propylene polymer component (B1) having the following property (B1-i); and 5 to 35% by weight of a propylene-ethylene copolymer component (B2) having the following properties (B2-i) and (B2-ii), (A-i) the polymer (A) has an ethylene content E(A) of from 0 to 6.0 wt %; (A-ii) the polymer (A) has a melt flow rate MFR(A) of from 0.1 to 100 g/10 min; (A-iii) the polymer (A) has a ratio Mw/Mn(A) between a weight average molecular weight Mw and a number average molecular weight Mn as measured by GPC of from 2 to 4; (B-i) the copolymer (B) has an ethylene content E(B) of from 0.4 to 13 wt %; (B-ii) the copolymer (B) has a melt flow rate MFR(B) of from 0.5 to 20 g/10 min;
(B1-i) the polymer component (B1) has an ethylene content E(B1) of from 0 to 6.0 wt %;(B2-i) the copolymer component (B2) has an ethylene content E(B2) of from 8 to 25 wt %; and(B2-ii) the copolymer component (B2) has a melt flow rate MFR(B2) of from 0.0001 to 0.5 g/10 min.