Phosphorus-containing flame retardants
AssigneeChemtura Corporation
InventorsLarry D. Timberlake, Mark V. Hanson, Narayan Subramaniam, William R. Fielding
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Abstract
A flame-retardant resin composition comprises a base resin (A), such as a polyester, polyamide or polycarbonate resin, and an organophosphorus compound (B) having at least one of the following formulas (I), (II) and (III): where A is selected from O, S, SO2, a single bond, alkyl, and —CH2—P1; P1 is a phosphorus-containing group of the formula: R1 and R2 are the same or different and each is selected from H, O-alkyl, O-aryl, alkyl, aryl, and OM; R3 is H or alkyl; M=Na, K, Zn, Al, Ca; a is an integer from 0 to 4, provided that a is at least 1 unit for each polymer chain; n is an integer from 1 to 100,000 and m is an integer from 0 to 100,000.
Claims17
A flame-retardant resin composition comprising a polyamide base resin (A), and one or more organophosphorus compound (B) of formulas V, VII or VIII:
- wherein n is an integer from 1 to 100,000, and
- (C) at least one flame retardant adjuvant material selected from the group consisting of melamine salts, inorganic metal compounds and clay compounds.
Dependencies are inferred from the claim text.