| 摘要 |
PURPOSE:To obtain a polyacetal composition having excellent uniform dispersion properties and heat stability, and exceedingly slight deterioration of color in stagnation by containing specific amount of poly-beta-alanine copolymer having specific structure as heat stabilizer. CONSTITUTION:(A) polyacetal resin is mixed with (B) 0.01-5wt.% poly-beta-alanine copolymer (preferably having a molecular weight corresponding to 2-8dl/g reduced viscosity) composed of copolymer of B1: 80-99.95wt.% acrylamide and B2 20-0.05wt.% vinyl monomer except for acrylamide (e.g. N,N'-methylene bisacrylamide). |
