Patent ID: 8796367

Claim:
A thermoplastic polyester resin composition comprising 100 parts by weight of a thermoplastic polyester resin (A), 5 to 40 parts by weight of a phosphinate (B), and an organosiloxane (X); wherein the phosphinate (B) is a calcium salt or aluminium salt of phosphine acid of which an anion part is represented by the formula (1) or (2); wherein R 1 's and R 2 's each independently are an alkyl group having 1 to 6 carbon atoms, or an aryl group which may have a substituent; R 1 's may be the same or different to each other; R 3 's are an alkylene group having 1 to 10 carbon atoms, an arylene group which may have a substituent, or a combination of at least two thereof; R 3 's may be the same or different to each other; and n is an integer of 0 to 4; and which, as the organosiloxane (X), comprises 1.5 to 10 parts by weight of an organosiloxane compound (X-1) or 0.01 to 5 parts by weight of an organosiloxane polymer (X-2), relative to 100 parts by weight of the thermoplastic polyester resin (A), wherein the organosiloxane compound (X-1) comprises organic groups bonding to a silicon atom directly or via an oxygen atom, and 40 mole % or more of the organic groups is an aryl group, and the organosiloxane polymer (X-2) is in the form of solid at 25° C.; wherein when the thermoplastic polyester resin composition is formed through injection-molding, two obtained molded articles are put to a pressure of 5 Kgf on the contact area thereof, and the molded article of the lower side is turned over at a linear speed of 10 cm/sec for 20 hours while the molded article of the upper side is fixed, the total specific wear rate of the two obtained molded articles is 0.3 mm 3 /kgf·km or less; and when the thermoplastic polyester resin composition is formed to be a molded article having a thickness of 0.8 mm, the obtained molded article satisfies V-0 according to UL-94 test.