Patent ID: 6790886
Filing Date: 2004-09-14
Classification: C08K,C08L

Abstract:
A flame-retardant resin composition which comprises a flame retardant comprising a phosphazene compound and a phenolic resin, and a polyalkylene terephthalate resin, wherein the phosphazene compound comprises at least one member selected from the group consisting of:(1) a cyclic phenoxyphosphazene compound of the formula wherein m is an integer of 3 to 25, and Ph denotes a phenyl group,(2) a linear phenoxyphosphazene compound of the formula wherein X represents the group â€”N&boxH;P(OPh)3 or the group â€”N&boxH;P(O)OPh; Y1 represents the group â€”P(OPh)4 or the group â€”P(O) (OPh)2; n is an integer of 3 to 10,000; and Ph has the same meaning as defined in the formula (1), and(3) a crosslinked phenoxyphosphazene compound which is formed by crosslinking at least one phenoxyphosphazene compound selected from the group consisting of the cyclic phenoxyphosphazene compound (1) and the linear phenoxyphosphazene compound (2) with at least one crosslinking group selected from the group consisting of o-phenylene group, m-phenylene group, p-phenylene group, and a bisphenylene group shown by the formula (3a): wherein A represents â€”C(CH3)2â€”, â€”SO2â€”, â€”Sâ€” or â€”Oâ€”, and a denotes 0 or 1,wherein the proportion of the crosslinking group in the cross linked phenoxyphosphazene compound is in terms of phenyl group, 0.1 to 50 mol % relative to the total phenyl groups in the phenoxyphosphazene compounds (1) and (2), and wherein the flame retardant comprises a weight ratio of the phosphazene compound to the phenolic resin of from 5/95 to 95/5.