Patent ID: 8796367
Filing Date: 2014-08-05
Classification: C08G,C08K,C08L

Abstract:
1. 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 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.