POLYACETAL RESIN COMPOSITION, RESIN MOLDED ARTICLE, REFORMING METHOD FOR POLYACETAL RESIN MATERIAL COMPOSITION, AND REFORMING AGENT

摘要

PROBLEM TO BE SOLVED: To provide a polyacetal resin composition excellent in heat stability and weather resistance and suppressing the generation amount of formaldehyde and reduction of mechanical strength although it is colored by a pigment. SOLUTION: In the polyacetal resin composition, 0.01-5 pts.wt. of a coloring agent selected from inorganic and organic pigments, 0.01-3 pts.wt. of a polyamide resin having at least either a physical property that the melting point or softening point is 180°C or less or a physical property that the amine value is 2 mgKOH/g or more, 0.01-1 pts.wt. of a dihydrazide compound, 0.01-5 pts.wt. of a hindered amine-based light stabilizer having a structure represented by formula (1) and 0.01-5 pts.wt. of a UV absorber are included in 100 pts.wt. of a polyacetal resin. In formula (1), X represents an organic group in which the bonding part with a nitrogen atom is a carbon atom, and Y represents an organic group bonded to a piperidyl group through an oxygen atom or a nitrogen atom, or a hydrogen atom. COPYRIGHT: (C)2011,JPO&INPIT