Patent ID: 7183340

Claim:
A polyacetal resin composition which comprises a polyacetal resin, an antioxidant, a guanamine compound, and at least one member selected from the group consisting of a processing stabilizer and a heat stabilizer, wherein the guanamine compound comprises a compound represented by the following formula (2): wherein R 1 and R 2 are the same or different and each represents a hydrogen atom or an alkyl group; “m” denotes an integer of not less than 2; the unit —N—X represents an amine residue which is a residue of a (poly)alkylenepolyamine, an imidazole compound, an isocyanuric acid, or a hydantoin compound; and “n” denotes an integer of 1 to 6, or a salt of the guanamine compound with a hydroxyl group-containing triazine compound, wherein the antioxidant comprises a hindered phenol-series compound and/or a hindered amine-series compound, and wherein the resin composition comprises 0.001 to 5 parts by weight of the antioxidant, 0.001 to 10 parts by weight of the guanamine compound or the salt thereof, 0.01 to 5 parts by weight of the processing stabilizer and/or 0.001 to 5 parts by weight of the heat stabilizer, each relative to 100 parts by weight of the polyacetal resin.