Blends of polyolefin graft copolymers and polycarbonate

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...

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525 92E, 525 92F, C08L 5106, C08L 5302

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active

055854346

ABSTRACT:
Disclosed is a composition comprising, by weight, (a) about 94% to about 30% of a graft copolymer comprising a backbone of a propylene polymer material having graft polymerized thereto monomers that form grafted copolymers or terpolymers, the monomers being selected from the group consisting of (i) styrene and acrylonitrile, and (ii) styrene and maleic anhydride, or alpha-methylstyrene, styrene and maleic anhydride, wherein the grafted copolymers or terpolymers formed from (i) or (ii) are present in an amount of about 10 to about 95 pph of propylene polymer material, (b) about 5% to about 40% of at least one aromatic polycarbonate, and (c) about 1% to about 15% of at least one aliphatic polyester. The composition optionally also comprises about 5% to about 20% of one or more rubber components, about 1% to about 50% of a propylene polymer material, or both.

REFERENCES:
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patent: 5034457 (1991-07-01), Serini et al.
patent: 5140074 (1992-08-01), DeNicola
patent: 5262476 (1993-11-01), Laughner
patent: 5314949 (1994-05-01), Kozakura
patent: 5411994 (1995-05-01), Galli
patent: 5424361 (1995-06-01), DeRudder

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