Patent ID: 8524815

Claim:
A flame retardant thermoplastic polyurethane composition having good melt processing characteristics comprising: (a) at least one thermoplastic polyurethane polymer; wherein said thermoplastic polyurethane is formed by the reaction of: (i) hydroxyl terminated intermediate, (ii) aromatic diisocyanate, and (iii) glycol chain extender; (b) from about 15 to about 25 weight percent of a first organic non-halogenated flame retardant component comprising a phosphinate compound; (c) from about 5 to about 10 weight percent of a second organic non-halogenated flame retardant component comprising a phosphate compound; (d) from about 2.5 to about 10 weight percent of a third organic non-halogenated flame retardant component selected from pentaerythritol and dipentaerythritol; and (e) talc; wherein the weight percents are based on the total weight of the thermoplastic polyurethane composition, and wherein said flame retarded thermoplastic polyurethane has a VO rating at 1.90 mm thickness as measured according to UL 94 vertical burn test and a Limited Oxygen Index of at least about 35 as measured according to ASTM D2863.