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US 12,415,905 B2Granted
Flame-retardant thermoplastic polyurethane
AssigneeBASF SE
InventorsOliver Steffen Henze, Oliver Muehren, Birte Nitz, Tanja Lange, Sabine Moeller, Alfons Bertels
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Abstract
The present invention relates to compositions comprising at least one thermoplastic polyurethane, a first phosphorus-containing flame retardant (F1) selected from the group consisting of melamine polyphosphates and a further phosphorus-containing flame retardant (F2) selected from the group consisting of derivatives of phosphinic acid, wherein the composition is free from melamine cyanurate, and to the use of such a composition for the production of cable sheathings.
Claims21
A composition, comprising:
- (i) a thermoplastic polyurethane, wherein polyether diols or polycarbonate diols are used to produce the thermoplastic polyurethane,
- (ii) a melamine polyphosphate as a first phosphorus-containing flame retardant (F1) in an amount of from 5% to 20% by weight based on a total composition,
- (iii) a phosphinic acid derivative as a second phosphorus-containing flame retardant (F2) in an amount of from 10% to 35% by weight based on the total composition, and
- (iv) a third phosphorus-containing flame retardant, which is a liquid phosphoric ester at 21° C., in an amount of from 2% to 10% by weight based on the total composition,
- wherein the third phosphorus-containing flame retardant is selected from the group consisting of 1,3-phenylene bis(diphenyl)phosphate;
- 1,3-phenylene bis(dixylenyl)phosphate;
- resorcinol bis(diphenyl phosphate) (RDP);
- bisphenol A bis(diphenyl phosphate) (BDP);
- and diphenyl cresyl phosphate (DPC);
- wherein the composition is free from melamine cyanurate, and
- wherein the phosphorus-containing flame retardants in the composition consist of those selected from (i), (iii), and (iv).
8 more elements
A composition, comprising:
- (i) a thermoplastic polyurethane, wherein polyether diols or polycarbonate diols are used to produce the thermoplastic polyurethane,
- (ii) a melamine polyphosphate as a first phosphorus-containing flame retardant (F1) in an amount of from 5% to 20% by weight based on a total composition,
- (iii) a phosphinic acid derivative as a second phosphorus-containing flame retardant (F2) in an amount of from 10% to 35% by weight based on the total composition, and
- (iv) a third phosphorus-containing flame retardant, which is a liquid phosphoric ester at 21° C., in an amount of from 2% to 10% by weight based on the total composition,
- wherein the third phosphorus-containing flame retardant is selected from the group consisting of 1,3-phenylene bis(diphenyl)phosphate;
- 1,3-phenylene bis(dixylenyl)phosphate;
- resorcinol bis(diphenyl phosphate) (RDP);
- bisphenol A bis(diphenyl phosphate) (BDP);
- and diphenyl cresyl phosphate (DPC);
- wherein the composition is free from melamine cyanurate, and
- wherein the composition does not comprise alkyl esters of phosphoric acid.
8 more elements
Dependencies are inferred from the claim text.