Process for producing propylene copolymer

Details Process for producing propylene copolymer Process for producing propylene copolymer

1984-12-27

1987-09-29

Smith, Edward J.

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

Synthetic resins

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

525240, 525268, 525322, 525323, 526308, 526282, C08L 2310, C08L 2314

Patent

active

046969799

ABSTRACT:
A process for producing a propylene copolymer having improved transparency and rigidity, which comprises carrying out (A) the polymerization of a vinyl cycloalkane having at least 6 carbon atoms and (B) the polymerization of propylene either alone or with ethylene in a multiplicity of steps in the presence of a catalyst system composed of a titanium compound and an organoaluminum compound. The content of the vinyl cycloalkane unit in the resulting copolymer is 0.05 to 10,000 weight ppm.

REFERENCES:
patent: 3755500 (1973-08-01), Clark
patent: 4551501 (1985-11-01), Shiga et al.

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