Patent ID: 7186766
Filing Date: 2007-03-06
Classification: C08K

Abstract:
1. A polyacetal resin composition which comprises a polyacetal resin (A); at least one member selected from the group consisting of a phenol component (B1) and an amino acid (B2), wherein the phenol component (B1) comprises at least one member selected from the group consisting of (i) a resin of which a main chain or a side chain has an aromatic ring having a hydroxyl group and (ii) a polyphenol selected from the group consisting of a polyhydric phenol, a trisphenol, a catechin compound, a teanine, a tannin and a lignin, and the amino acid (B2) comprises at least one member selected from the group consisting of an α-amino acid, a β-amino acid, a γ-amino acid and a δ-amino acid, a phenol-series antioxidant, a heat stabilizer selected from the group consisting of a basic nitrogen-containing compound, a metal salt of an organic carboxylic acid, and an alkali or alkaline earth metal compound; and a processing stabilizer selected from the group consisting of a long-chain or higher fatty acid or a derivative thereof, a polyoxyalkylene glycol, and a silicone-series compound; wherein the composition is substantially free from a phosphorus-containing flame retardant; and wherein the proportion of the phenol component (B1) is 0.001 to 1 part by weight and the proportion of the amino acid (B2) is 0.001 to 10 parts by weight relative to 100 parts by weight of the polyacetal resin (A), and wherein the proportions of the antioxidant, the heat stabilizer and processing stabilizer are 0.01 to 5 parts by weight, 0.001 to 10 parts by weight, and 0.01 to 10 parts by weight, respectively, relative to 100 parts by weight of the polyacetal resin (A).