Process for producing ethylene-propylene block copolymer

Details Process for producing ethylene-propylene block copolymer Process for producing ethylene-propylene block copolymer

1992-07-01

1995-09-12

Delmendo, Romulo H.

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

Synthetic resins

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

525254, 525270, 525323, C08F29708

Patent

active

054497388

ABSTRACT:
The present invention relates to a process for producing ethylene propylene block copolymers excellent in appearance, elongation and impact resistance when molded by a gas phase polymerization which can be conducted in a stable manner.
The process of the present invention comprises the first step of polymerizing propylene by using a catalyst system composed essentially of

REFERENCES:
patent: 4547552 (1985-10-01), Toyota et al.
patent: 5023223 (1991-06-01), Ebara et al.
Chemical Abstracts, vol. 105, No. 9, Nov. 1986, Abrstract No. 153688S.

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