Patent ID: 6319991
Filing Date: 2001-11-20
Classification: B01J,C08L

Abstract:
A propylene polymer blend comprising(A) a propylene-ethylene or proplene-.alpha.-olefin random copolymer with a propylene content of 90 to 99% by weight and(B) a propylene-ethylene or propylene-.alpha.-olefin random copolymer with a propylene content of 55 to 90% by weight,wherein the derived intrinsic viscosity ([.eta..sub.B ]) of the copolymer B ranges from 1.3 to 3.5 dl/g, the ratio ([.eta..sub.B ]/[.eta..sub.A ]) of the derived intrinsic viscosity ([.eta..sub.B ]) of the copolymer B to the intrinsic viscosity ([.eta..sub.A ]) of the copolymer A ranges from 0.6 to 1.2 and a product (([.eta..sub.B ]/[.eta..sub.A ]).times.(W.sub.A /W.sub.B)) of the intrinsic ratio ([.eta..sub.B ]/[.eta..sub.A ]) of both copolymers and the weight ratio (W.sub.A /W.sub.B) of both copolymers ranges from 1.0 to 4.5.