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US 4,430,467 AGranted
Self-extinguishing propylene polymer
AssigneeSaytech, Inc.
InventorsJoseph M. Lesniewski, Michael J. Breza
Life of this patent
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Abstract
A flame retardant polymer composition comprising 2,3-dimethyl-2,3-diphenylbutane, a halogenated bisimide corresponding to the formula: ##STR1## wherein Q is methylene or oxygen, X is chlorine or bromine, R is hydrogen or an alkyl group containing 1-5 carbon atoms, R' is hydrogen or methyl and R" is an organic group containing 1-15 carbon atoms, and a polypropylene polymer selected from the group consisting of polypropylene and copolymers containing at least 50% by weight of co-polymerized propylene monomer.
Claims3
A flame retardant polymer composition comprising:
- (a) a polypropylene polymer selected from the group consisting of polypropylene and copolymers containing at least 50% by weight of co-polymerized propylene monomer,
- (b) a halogenated aliphatic bisimide corresponding to the formula:
- ##STR7## wherein Q is methylene or oxygen, X is chlorine or bromine, R is hydrogen or an alkyl group containing 1-5 carbon atoms, R' is hydrogen or methyl and R" is an organic group containing 1-15 carbon atoms and
- (c) 2,3-dimethyl-2,3-diphenylbutane.
1 more element
Dependencies are inferred from the claim text.