公开(公告)号：US20160237221A1

公开(公告)日：2016-08-18

申请号：US15027084

申请日：2014-09-09

Applicant: POLYPLASTICS CO., LTD.

Inventor： Tomohiro MONMA ,  Kazufumi WATANABE ,  Akihide Shimoda

IPC: C08J3/20 ,  C08J3/00

Abstract: A polyoxymethylene resin composition from which formaldehyde is generated in a reduced amount upon molding, without carrying out a stabilization treatment for stabilizing an unstable terminal group in a crude oxymethylene copolymer. A hindered phenol-type antioxidant agent and an ethylene-(methacrylic acid) copolymer resin or an ethylene-(acrylic acid) copolymer resin or a salt thereof are melted and kneaded together to produce a polyoxymethylene resin composition without carrying out a stabilization treatment for stabilizing an unstable terminal group in a crude oxymethylene copolymer for which a polymerization catalyst is deactivated after the completion of copolymerization and in which the unstable terminal group is not yet stabilized. When the polyoxymethylene resin composition is extrusion-molded, the discoloration of a molded product or the deterioration in properties of the molded product can be prevented for a long period of time. The resulting polyoxymethylene resin composition is suitable for forming an extrusion-molded article.

Abstract translation: 一种聚甲醛树脂组合物，其在成型时由甲醛产生量减少，而不进行用于稳定粗甲醛共聚物中不稳定末端基团的稳定化处理。 将受阻酚型抗氧化剂和乙烯 - （甲基丙烯酸）共聚物树脂或乙烯 - （丙烯酸）共聚物树脂或其盐熔融并捏合在一起以制备聚甲醛树脂组合物，而不进行用于稳定化的稳定化处理 粗制甲醛共聚物中的不稳定末端基团，其中聚合催化剂在共聚完成后失活，并且其中不稳定末端基团尚未稳定。 当聚甲醛树脂组合物被挤出成型时，可以长时间地防止模制品的变色或成型产品的性能劣化。 所得聚甲醛树脂组合物适用于形成挤出成型制品。