Compositions based on random propylene copolymers, process...

Details Compositions based on random propylene copolymers, process... Compositions based on random propylene copolymers, process...

2006-03-21

2006-03-21

Nutter, Nathan M. (Department: 1711)

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

Synthetic resins

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

C525S240000

Reexamination Certificate

active

07015287

ABSTRACT:
Compositions based on propylene polymers (compositions (C)) comprising: a) from 61 to 74% by weight of a random propylene copolymer (copolymer (A)) comprising from 8 to 16% by weight of monomer units derived from 1-butene and less than 0.5% by weight of monomer units derived from ethylene, and b) from 39 to 26% by weight of a random propylene copolymer (copolymer (B)) comprising from 35 to 50% by weight of monomer units derived from 1-butene and from 0 to 1% by weight of monomer units derived from ethylene. Process for the manufacture of these compositions.

REFERENCES:
patent: 4481336 (1984-11-01), Fujii et al.
patent: 6258893 (2001-07-01), Okayama et al.

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