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US 10,377,880 B2Granted
Flame-retardant thermoplastic polyurethane based on polycarbonate diols
AssigneeBASF SE
InventorsOliver Steffen Henze, Oliver Muehren, Alfons Bertels, Sabine Conrad
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Abstract
The present invention relates to compositions comprising at least one thermoplastic polyurethane, at least one metal hydroxide, and at least one phosphorus-containing flame retardant, where the thermoplastic polyurethane is a thermoplastic polyurethane based on at least one diisocyanate and on at least one polycarbonatediol. The present invention further relates to the use of compositions of this type for producing cable sheathing.
Claims15
A composition comprising:
- from 30 to 90% of a thermoplastic polyurethane comprising copolymerized units of a diisocyanate and at least one polycarbonatediol;
- from 15 to 65% by weight of a metal hydroxide;
- and
- from 3 to 20% by weight of a phosphorus-containing flame retardant;
- wherein
- the phosphorus-containing flame retardant is a liquid at 21° C.,
- the phosphorus-containing flame retardant is one selected from triesters of phosphoric acid of formula (I):
- wherein R is optionally substituted alkyl, cycloalkyl, or phenyl groups, and n=from 1 to 15,
- the diisocyanate is diphenylmethane diisocyanate (MDI), and
- the at least one polycarbonatediol is selected from the group consisting of polycarbonatediols based on butanediol and hexanediol, polycarbonatediols based on pentanediol and hexanediol, and polycarbonatediols based on hexanediol.
7 more elements
Dependencies are inferred from the claim text.