Thermoplastic polyurethane composition with high insulation resistance

摘要

Flame retardant compositions that include a thermoplastic polyurethane, a metal hydrate flame retardant and a phosphorus-based flame retardant are provided. The compositions are characterized by good flame retardant properties, as well as high insulation resistance.

主权项

1. A composition comprising:
(a) 20-40 wt % of a thermoplastic polyurethane; (b) 30-41 wt % of a metal hydrate flame retardant selected from the group consisting of aluminum hydroxide and magnesium hydroxide; and (c) 10-15 wt % of bisphenol A bis(diphenyl phosphate); (d) 0.1-5 wt % of a char-forming agent comprising an epoxidized novolac resin; the wt % based on the total weight of the composition; the composition characterized in that it passes the UL 94 flame retardant standard and has an insulation resistance of at least 3 GΩ.m as measured by UL 62.