Polypropylene-based resin composition and process for preparatio

Details Polypropylene-based resin composition and process for preparatio Polypropylene-based resin composition and process for preparatio

1990-05-04

1991-06-25

Seccuro, Carman 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, 2641761, 2642106, 524528, 524387, C08L 2310, C08L 2316, C08L 4500, C08J 518

Patent

active

050267787

ABSTRACT:
A polypropylene-based resin composition consisting essentially of 60-98% by weight of a polypropylene-based resin selected from the group consisting of (i) homopolypropylene, (ii) a crystalline random copolypropylene and (iii) a mixture of homopolypropylene and a crystalline random copolypropylene, 1-30% by weight of a petroleum resin, and 1-20% by weight of a low-crystalline or amorphous ethylene-.alpha.-olefin copolymer having a refractive index of from 1.480 to 1.505 at 25.degree. C., and when said polypropylene-based resin is a crystalline random copolypropylene or a mixture of a homopolypropylene and a crystalline random copolypropylene, said ethylene-.alpha.-olefin is an amorphous copolymer.

REFERENCES:
patent: 3278646 (1966-10-01), Lambert
patent: 3361849 (1968-01-01), Cramer et al.
patent: 3663488 (1972-05-01), Kail
patent: 4629639 (1986-12-01), Lucas

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