| 摘要 |
本发明所提供的聚缩醛树脂组成物，系具有优异的加工性与安定性，明显抑制来自其成形品的甲醛产生量，亦能防止调配成分之渗出，且耐候(光)性优异。详言之，相对于(A)半缩甲醛末端基量1.0mmol/kg以下、甲醯基末端基量2.0mmol/kg以下、不安定末端基量0.5重量%以下的聚缩醛共聚物，将(B)受阻酚系抗氧化剂、(C)从胍胺化合物(c－1)与醯肼化合物(c－2)中至少选择1种的化合物、(D)具立体障碍性基之哌啶衍生物且氮为三级的受阻胺安定剂、以及(E)紫外线吸收剂，依特定调配量及调配比进行调配。;[Problem] To provide a polyacetal resin composition having excellent processability and stability, significantly suppressing the generation of formaldehyde from the molded article thereof, preventing oozing of the components, and giving excellent weathering (light) resistance.;[Means for Resolution] There are mixed: (A) a polyacetal copolymer having 1.0 mmol/kg or smaller quantity of hemiformal terminal group, 2.0 mmol/kg or smaller quantity of formyl terminal group, and 0.5% by weight or smaller quantity of instable terminal group; (B) a hindered phenol-based antioxidant; (C) at least one compound selected from the group consisting of (c-1) a guanamine compound and (c-2) a hydrazide compound; (D) a hindered amine stabilizer in which the nitrogen in a piperidine derivative having a steric hindrance group is ternary; and (E) a UV absorber, at a specified mixing ratios. |
