Propylene polymers and process for the preparation thereof

Details Propylene polymers and process for the preparation thereof Propylene polymers and process for the preparation thereof

1997-06-25

1999-04-20

Smith, Edward J.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

5261249, 5261253, C08F21008, C08F21002

Patent

active

058958037

ABSTRACT:
Statistical propylene copolymer containing 0.2-0.9% by weight monomeric units derived from ethylene; 13-21% by weight monomeric units derived from .alpha.-olefin having 4-10 carbon atoms, and 78.1-86.8% by weight monomeric units derived from propylene. The copolymer has a melting point of 115-125.degree. C.; a proportion of polymer soluble in boiling heptane greater than or equal to 95% by weight, and a proportion of polymer soluble in cold xylene (25.degree. C.) greater than 40% by weight.

REFERENCES:
patent: 4322514 (1982-03-01), Migoshi et al.
patent: 4404342 (1983-09-01), Migoshi et al.
patent: 4761462 (1988-08-01), Kitamura et al.
patent: 5247031 (1993-09-01), Kioka et al.
patent: 5438110 (1995-08-01), Ishimarua et al.
Translations of Japanese 63-95208 and 63-95209.

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