HALOGEN-FREE FLAME RETARDANT TPU COMPOSITE

摘要

PROBLEM TO BE SOLVED: To provide a thermoplastic polyurethane (TPU) composite that is a halogen-free flame retardant (HFFR).SOLUTION: Halogen-free TPU compositions comprise, in weight percent based on the weight of the composition: A. 1 to 99 wt.% of TPU, B. 1 to 50 wt.% of tris(2-butoxyethyl)phosphate (TBEP), C. 1 to 70 wt.% of metal hydrate, and D. 1 to 70 wt.% of organic phosphate ester other than tris(2-butoxyethyl)phosphate. These compositions exhibit better smoke suppression than conventional organic phosphate flame retardant TPU compositions such as those based on resorcinol bis(diphenyl phosphate) (RDP) and bisphenol-A bis(diphenyl phosphate) (BPADP) in the absence of TBEP.