Patent ID: 7812077

Claim:
A composition consisting essentially of: (a) from 20 to 80 wt. % of a polyester component comprising a modified polybutylene terephthalate random copolymer (1) comprising the reaction product of a depolymerized polyethylene terephthalate component selected from the group consisting of polyethylene terephthalate and polyethylene terephthalate copolymers and 1,4-butane diol and (2) that has at least one residue derived from the polyethylene terephthalate component and containing a mixture of ethylene glycol groups, diethylene glycol groups and isophthalic acid groups; (b) from 5 to 35wt. % of a flame retardant phosphinate of the formula (I) [(R 1 )(R 2 )(PO)—O] − m M m+ (I) a flame retardant diphosphinate of the formula (II) [(O—POR 1 )(R 3 )(POR 2 —O)] 2− n M m+ x (II), and/or a flame retardant polymer derived from the flame retardant phosphinate of the formula (I) or the flame retardant diphosphinate of the formula (II), wherein R 1 and R 2 are identical or different and are H, C 1 -C 6 -alkyl, linear or branched, and/or C 6 -C 10 aryl; R 3 is C 1 -C 10 , alkylene, linear or branched, C 6 -C 10 -arylene, -alkylarylene or -arylalkylene; M is an alkaline earth metal, alkali metal, Al, Ti, Zn, Fe, or boron; m is 1, 2, 3 or 4; n is 1, 2, or 3; and x is 1 or 2; (c) from 1 to 25 wt. % of a melamine polyphosphate, melamine cyanurate, melamine pyrophosphate, and/or melamine phosphate; and (d) from more than 0 to 25 wt. % of a polyetherimide; (e) optionally, from more than 0 to 50 wt. % of a reinforcing filler; (f) from 0 to 5 wt. % of a chlorinated and/or brominated organic compound; and optionally an additive component selected from the group consisting of an antioxidant, a lubricant, a thermal stabilizer, an ultraviolet light absorbing additive, a quencher, a plasticizer, an antidripping agent, a mold release agent, an antistatic agent, a dye, a pigment, a laser marking additive, a radiation stabilizer, and a combination thereof wherein components (a), (b), (c), (d), (e), (f), the optionally additive component, have a combined total weight of 100 wt. %; wherein the composition exhibits improved flow as compared to a molding composition containing polybutylene terephthalate derived from monomers instead of the modified polybutylene terephthalate random copolymer; and wherein a molded article comprising the composition has an unnotched Izod impact strength from 20 to 50 kJ/m 2 , measured at 23° C. in accordance with ISO 180, and a 0.8 mm thick molded sample comprising the composition has a UL-94 flammability rating of V0.