Flame retardant polypropylene molding compositions

Details Flame retardant polypropylene molding compositions Flame retardant polypropylene molding compositions

1990-08-21

1992-06-23

Marquis, Melvyn I.

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

Synthetic resins

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

252609, C08L 5106

Patent

active

051244047

ABSTRACT:
Described are polypropylene molding compositions which have surprisingly good physical properties in combination with flame retardancy, which include copolymers represented by the formula: ##STR1## wherein n is >1, P is isotactic or syndiotactic polypropylene, and S is a grafted side chain having brominated monomeric units of the formula: ##STR2## wherein x=1 to 4, R.sub.1 is H or CH.sub.3, and R.sub.2 is H or a C.sub.1-4 lower alkyl group. Polymer blends including such graft copolymers and methods for making such flame retardant polymer compositions are also described.

REFERENCES:
patent: 3458597 (1969-07-01), Jabloner
patent: 4279808 (1981-07-01), Hornbaker et al.

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