Patent ID: 9670357
Date: 2017-06-06
CPC Classifications: C08K,C08L

Claim:
1. A polybutylene terephthalate flame retardant composition that comprises: (a) 5 to 9 parts by weight of a polybutylene terephthalate wherein the first polybutylene terephthalate has an intrinsic viscosity of 1.15 to 1.25 cm (b) 0.25 to 2.5 parts by weight of polytetrafluorethylene; (c) 4 to 18 parts by weight of melamine polyphosphate; and (d) 12 to 26 parts by weight of poly(pentabromobenzylacrylate), provided that the combined amount of (c) and (d) is at least 18 parts by weight and less than or equal to 30 parts by weight; wherein: the composition is substantially antimony-free, the composition has a tensile strength at break according to ASTM D638-2010 of greater than 110 Mpa; and wherein: (i) the composition has a UL 94 (23° C./50% RH) test rating of V-0; or (ii) the composition has a UL 94 (70° C.) test rating of V-0; or (iii) the composition has a UL 94 (23° C./50% RH) test rating of V-0 and a UL 94 (70° C.) test rating of V-0, wherein the composition further comprising 25 to 35 parts by weight of a glass fiber.