Patent ID: 6395831
Filing Date: 2002-05-28
Classification: C08F,C08L

Abstract:
A crystalline propylene copolymer composition having:(i). a composition MFR L(1) value before degradation of from 0.3 to 5 g/10 min.; (ii). a composition MFR L(2) value after degradation of from 2 to 15 g/10 min; and (iii). a ratio of MFR L(2) to MFR L(1) of from 2 to 20, the propylene copolymer composition comprising (percent by weight): A) 20-80% of one or more propylene copolymers selected from the group consisting of (A 1) propylene/ethylene copolymers containing 1-7% of ethylene; (A 2) copolymers of propylene with one or more C4-C8 alpha-olefins, containing 2-10% of the C4-C8 alpha-olefins; (A 3) copolymers of propylene with ethylene and one or more C4-C8 alpha-olefins, containing 0.5-4.5% of ethylene and 2-6% of C4-C8 alpha-olefins, provided that the total content of ethylene and C4-C8 alpha-olefins in (A 3) be equal to or lower than 6.5%; B) 20-80% of one or more propylene copolymers selected from the group consisting of (B 1) copolymers of propylene with one or more C4-C8 alpha-olefins, containing from more than 10% to 30% of C4-C8 alpha-olefins; (B 2) copolymers of propylene with ethylene and one or more C4-C8 alpha-olefins, containing 1-7% of ethylene and 6-15% of C4-C8 alpha-olefins.