Propylene block copolymer and process for producing the same

Details Propylene block copolymer and process for producing the same Propylene block copolymer and process for producing the same

1995-11-16

1997-12-30

Zemel, Irina S.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525232, 526126, C08F 1006

Patent

active

057031720

ABSTRACT:
A propylene block copolymer comprising a matrix phase and a dispersed phase dispersed in said matrix phase, said matrix phase comprising (a) polypropylene; said dispersed phase having an average particle diameter of from 0.1 to 5 .mu.m; and said dispersed phase comprising an outer layer comprising (b) propylene-.alpha.-olefin copolymer rubber and an inner layer comprising (c) crystalline polyethylene dispersed therein a plurality of particles comprising an outer layer comprising (b') propylene-.alpha.-olefin copolymer rubber and an inner layer comprising (a') polypropylene, a propylene block copolymer comprising a matrix phase and a dispersed phase dispersed in said matrix phase, said matrix phase comprising (a) polypropylene; said dispersed phase having an average particle diameter of from 0.1 to 5 .mu.m; and said dispersed phase comprising (b) propylene-.alpha.-olefin copolymer rubber having therein at least one particle comprising (a') polypropylene and at least one particle comprising (c) crystalline polyethylene. Propylene block copolymer resin compositions comprising the propylene block copolymers, and processes for producing a propylene block copolymers.

REFERENCES:
patent: 4990476 (1991-02-01), Ishimaru
patent: 5130248 (1992-07-01), Terano
patent: 5244989 (1993-09-01), Hara
patent: 5247031 (1993-09-01), Kioka
patent: 5247032 (1993-09-01), Kioka
patent: 5438110 (1995-08-01), Ishimaru
patent: 5453466 (1995-09-01), Pallegatti
patent: 5476903 (1995-12-01), Shinozaki et al.
patent: 5478890 (1995-12-01), Shinozaki et al.
patent: 5489634 (1996-02-01), Hara

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