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US 12,723,153 B2Granted
Copolyetherester
AssigneeCelanese Polymers Holding, Inc.
InventorEleni Karayianni
Life of this patent
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Abstract
The invention provides a copolyetherester compositions that are resistant to burning and which show reduced smoke production when exposed to heat or flame. The compositions include a polymer, aluminum diethylphosphinate and a zinc salt of phosphorus acid. Optionally, the composition can include an aluminum salt of phosphorus acid.
Claims16
A flame-retardant polymer composition comprising:
- (A) at least one polymer selected from copolyetherester, polyamide elastomer, thermoplastic polyolefinic elastomers, styrenic elastomer, thermoplastic polyurethane, thermoplastic vulcanisate;
- (B) 2 to 25 wt % aluminium diethylphosphinate;
- and
- (C) (c1) a zinc salt of phosphorous acid and (c2) an aluminium salt of phosphorous acid;
- wherein the total concentration of (C) is defined by:
- [
- wt
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- %
-
- (
- C
- )
- ]
- >
- 25
-
- /
- [
- wt
-
- %
-
- (
- B
- )
- ]
- wherein the weight percentages are based on the total weight of the composition,
- wherein the weight percentages are based on the total weight of the composition, wherein the aluminium salt of phosphorous acid is selected from mixtures of aluminium phosphite and aluminium hydroxide having the composition of 5-95% by weight of Al2(HPO3)3*nH2O and 95-5% by weight of Al(OH)3 wherein n=0 to 4.
26 more elements
Dependencies are inferred from the claim text.