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US 10,035,896 B2Granted
Salts of pyrophosphonic acid as flame retardants
AssigneeLANXESS Solutions US Inc.
InventorsZachary D. Stockdale, Matthew S. Burge
Life of this patent
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Abstract
Flame retardant polymer compositions comprising certain thermally stable salts of pyrophosphonic acid as flame retardant materials, which flame retardant materials comprise one or more than one metals, are prepared and have excellent flame retardant activity.
Claims16
A flame retardant polymer composition comprising:
- a) a thermoset or thermoplastic polymer,
- b) from 3% to 50% by weight, based on the total weight of the flame retardant polymer composition, of a flame retardant comprising one or more compounds of formula (I):
- wherein y is 2, 3 or 4, M is a metal with a formal charge of (+)y, and q and n are values that satisfy the charge balance of the complex, wherein the thermoset or thermoplastic polymer comprises a reinforcing agent and one or more of a styrenic polymer, polyolefin, polyester, epoxy resin, polycarbonate, polyamide, or polyurethane.
Dependencies are inferred from the claim text.