Use of metal salts with superpolyamides as oxymethylene polymer stabilizers
申请人:HOECHST CELANESE CORPORATION
公开号:EP0270278A1
公开(公告)日:1988-06-08
An oxymethylene polymer composition which exhibits improved thermal stability is provided by utilizing as a stabilizer a major amount of superpolyamide and a minor amount of a transition metal salt.
通过使用大量超聚酰胺和少量过渡金属盐作为稳定剂,提供了一种热稳定性更好的氧亚甲基聚合物组合物。
Polyacetal stabilizer formulation with improved color stability
申请人:HOECHST CELANESE CORPORATION
公开号:EP0270279A1
公开(公告)日:1988-06-08
An oxymethylene polymer composition which exhibits a reduced tendency to form mold deposits upon molding, reduced tendency to discolor under thermal stress and low extractable formaldehyde levels is provided by utilizing as a stabilizer a major amount of superpolyamide and a minor amount of a cyclic amidine compound of the formula:
wherein R is phenyl, polynuclear aromatic, heterocyclic, cycloaliphatic and aliphatic containing at least 6 carbon atoms, as well as substituted derivatives of the listed substituents.
本发明提供了一种氧亚甲基聚合物组合物,该组合物在成型时形成霉菌沉积物的趋势减弱,在热应力作用下褪色的趋势减弱,可萃取的甲醛含量低,其稳定剂主要是超聚酰胺和少量式如下的环状脒化合物:
其中 R 是苯基、多核芳香族、杂环族、环脂族和至少含 6 个碳原子的脂肪族,以及上述取代基的取代衍生物。