Flame retardant graft copolymers of polypropylene

Details Flame retardant graft copolymers of polypropylene Flame retardant graft copolymers of polypropylene

1990-02-22

1991-12-31

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...

525288, 524468, 524469, 524504, 524535, C08L 5106, C08F25502

Patent

active

050773372

ABSTRACT:
Described are polypropylene polymer compositions which have suprisingly good physical properties in combination with flame retardancy, which include graft copolymers represented by the formula: ##STR1## wherein n is >1, P is 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 flame retardant polymer compositions are also described.

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P. Citovicky et al., Thermochim Acta, 93, 171-174 (1985).
B. J. Hill et al., Comm. Eur. Communities [Rep.] Eur, Eur 6718 (1980).

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