Patent ID: 6521689
Filing Date: 2003-02-18
Classification: C08K,C08L

Abstract:
A flame-retardant aromatic polyamide resin composition comprising:(a) 100 parts by weight of an aromatic polyamide resin, (b) 0.1 to 100 parts by weight of a crosslinked phosphazene compound, (c) 1 to 60 parts by weight of an inorganic fibrous substance and (d) 1 to 60 parts by weight of magnesium hydroxide, wherein the crosslinked phosphazene compound (b) is a crosslinked compound obtained by crosslinking at least one phosphazene compound selected from the group consisting of a cyclic phenoxyphosphazene compound represented by the formula (1) â€ƒwherein m is an integer of 3 to 25 and Ph is a phenyl group and a linear phenoxyphosphazene compound represented by the formula (2) wherein X1 represents a group â€”N&boxH;P(OPh)3 or a group â€”N&boxH;P(O)OPh, Y1 represents a group â€”P(OPh)4 or a group â€”P(O)(OPh)2, n is an integer of 3 to 10000 and Ph is as defined above, with at least one crosslinking group selected from the class consisting of o-phenylene group, m-phenylene group, p-phenylene group and bisphenylene group represented by the formula (3) wherein A is â€”C(CH3)2â€”, â€”SO2â€”, â€”Sâ€” or â€”Oâ€” and a is 0 or 1; wherein (i) each of the crosslinking groups is interposed between the two oxygen atoms left after the elimination of phenyl groups from the phosphazene compound; (ii) the amount of the phenyl groups in the crosslinked compound is 50 to 99.9% based on the total amount of all phenyl groups in the phenoxyphosphazene compound represented by the formula (1) and/or the phenoxyphosphazene compound represented by the formula (2); and (iii) the crosslinked phosphazene compound has no free hydroxyl group in the molecule.