| abstract |
A highly versatile polyacetal resin composition is provided. The present invention uses trioxane as a main monomer (a), a cyclic ether having at least one carbon-carbon bond and/or a cyclic formal, as a comonomer (b), and is used in a polymerization catalyst (c). a reaction product in which a specific heteropoly acid is copolymerized, a carbonate, a hydrogencarbonate, a carboxylate or a water or an alkali metal element or an alkali earth metal hydroxide of an alkali metal element or an alkaline earth metal element is added ( d) a polyacetal copolymer obtained by performing a melt-kneading treatment to deactivate the polymerization catalyst (c), and an aliphatic polycarboxylic acid (e) having a carbon number of 4 or more and containing 2 or more carboxyl groups, and Hindered phenolic oxidation inhibitor (f). |