Patent ID: 6800677
Filing Date: 2004-10-05
Classification: C08K

Abstract:
A flame-retardant reinforced polyamide resin composition comprising (a) 30-70% by weight of a half-aromatic polyamide resin having a polyhexamethylene adipamide unit and a polyhexamethylene isophthalamide unit, (b) 10-38% by weight of a melamine polyphosphate, (c) 5-50% by weight of an inorganic reinforcing material, (d) 0-5% by weight of a polyalkylene polyhydric alcohol and/or a fatty acid ester derivative thereof, (e) 0-5% by weight of a bisamide compound, (f) 0-5% by weight of a metal oxide and/or a molybdate, and (g) 0-5% by weight of a metal salt of a higher fatty acid having 10-25 carbon atoms, where the ratio of the amounts of the half-aromatic polyamide resin (a) and the melamine polyphosphate (b) in the composition is 1.5-3.5, and the half-aromatic polyamide resin (a) is at least one polymer selected from the group consisting of (1) a copolymer comprising 70-95% by weight of a polyhexamethylene adipamide unit and 5-30% by weight of a polyhexamethylene isophthalamide unit; (2) a terpolymer comprising 60-89% by weight of a polyhexamethylene adipamide unit, 5-30% by weight of a polyhexamethylene isophthalamide unit and 1-10% by weight of an aliphatic polyamide unit other than polyhexamethylene adipamide; (3) a mixed polyamide containing 70-95% by weight of a polyhexamethylene adipamide component and 5-30% by weight of a polyhexamethylene isophthalamide component; and (4) a mixed polyamide containing 60-89% by weight of a polyhexamethylene adipamide component, 5-30% by weight of a polyhexamethylene isophthalamide component and 1-10% by weight of an aliphatic polyamide component other than polyhexamethylene adipamide.