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US 12,686,769 B2Granted
Polyetherester
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.
Claims18
A flame-retardant polymer composition comprising:
- (1) at least one polymer comprising copolyetherester;
- (2) aluminium diethylphosphinate;
- (3) zinc diethylphosphinate;
- and
- (4) 2 to 20 wt % of phosphite, wherein the phosphite is selected from an aluminium salt of phosphorous acid, a zinc salt of phosphorous acid, and a mixture of these,
- wherein the weight percentages are based on the total weight of the composition, wherein the composition has an LOI of 20 or greater when measured according to test method ISO 4589-1/-2, using test bars in the shape of rectangular bars of dimension 125 mm long by 13 mm wide and having an average thickness of about 1.7±0.1 mm.
3 more elements
Dependencies are inferred from the claim text.