Process for producing propylene block copolymers

Details Process for producing propylene block copolymers Process for producing propylene block copolymers

1995-07-13

1997-04-22

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...

525240, 525323, 526160, 526251, C08F29708

Patent

active

056230222

ABSTRACT:
A propylene block copolymer having a high impact resistance is prepared without the generation of finely divided particles or the adhesion to the reactor, which propylene block copolymer having a weight ratio of 5/95-70/30 (process (1)/process (2)) is obtained by carrying out the particular polymerization processes (1) and (2) in this sequence under the action of the catalyst comprising the following A and B.

REFERENCES:
patent: 5081322 (1992-01-01), Winter
patent: 5239022 (1993-08-01), Winter
patent: 5280074 (1994-01-01), Schreck
patent: 5322902 (1994-06-01), Schreck
patent: 5391629 (1995-02-01), Turner
patent: 5455365 (1995-10-01), Winter

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