Patent ID: 8404772

Claim:
A composition comprising, based on the total weight of the composition, (a) from 10 to 80 wt. % of a polybutylene terephthalate; (b) from 10 to 80 wt. % of a copolyestercarbonate having a number average molecular weight of more than 21,500 and comprising structural estercarbonate units of the formula: wherein each R 1 and R′ is a C 6-30 aromatic group, each T is a C 2-16 alkylene group, and x is the mole percent of ester units in the copolyestercarbonate based on total mole percent of ester and carbonate units, and is 5 to 10, wherein the ester and carbonate units represent at least 90 mol percent of the polyestercarbonate; (c) from 7 to 30 wt. % of a particulate filler; (d) from 0.02 to 10 wt. % of a fluoropolymer; (e) from 3 to 25 wt. % of a polymeric impact modifier; (f) from 0 to 5 wt. % of an additive selected from the group consisting of an antioxidant, mold release agent, colorant, quencher, stabilizer, and combination thereof; and (g) optionally, from 0.1 to 30 wt. % of a copolyestercarbonate having a number average molecular weight of less than 21,500 Daltons (h) optionally, from 0.1 to 30 wt. % of a bisphenol A polycarbonate; wherein a 4 mm thick bar molded from the composition has (1) a tensile modulus of more than 3800 MPa, determined in accordance with ISO 527; (2) a Notched Izod Impact strength of at least 30 KJ/m 2 , determined in accordance with ISO 180/1A at 23° C., and (3) a melt viscosity less than 350 Pa·s at 1500 s −1 at 265° C.