申请人:HOECHST CELANESE CORPORATION
公开号:EP0308045A2
公开(公告)日:1989-03-22
Ultraviolet curable terpolymers of trioxane, from at least 65 weight percent to about 75 weight percent of 1,3-dioxolane and from about 2 weight percent to about 20 weight percent of a monoethylenically unsaturated aliphatic diol formal having at least 4 carbon atoms in its main chain, e.g., 4,7-dehydro- 1,3-dioxepin, which are non-crystalline at room temperature or above are disclosed. These terpolymers, when admixed with a multifunctional crosslinking monomer, e.g., a multifunctional acrylate such as 1,6-hexanediol diacrylate, and a photosensitizer, e.g., a benzoin compound such as benzoin isobutyl ether, can be cured to an insoluble, non-tacky, rubbery state using UV radiation. The thus-cured polymeric materials form useful crosslinked films, and when cryogenically ground to a suitable small particle size can be blended with conventionally prepared crystalline oxymethylene homo-, co- and terpolymers to improve the latters' impact properties.
本发明公开了可紫外线固化的三元共聚物,其中三元共聚物包括至少 65% 至约 75% 重量百分比的 1,3-二氧戊环,以及约 2% 至约 20% 重量百分比的主链中至少有 4 个碳原子的单乙烯不饱和脂肪族二元醇形式,例如 4,7-脱氢- 1,3-二氧杂环庚烷,在室温或以上条件下为非结晶型。这些三元共聚物与多功能交联单体(如 1,6-己二醇二丙烯酸酯等多功能丙烯酸酯)和光敏剂(如安息香异丁醚等安息香化合物)混合后,可通过紫外线辐射固化成不溶解、不粘连的橡胶状态。这样固化的聚合材料可形成有用的交联薄膜,当低温研磨到合适的小粒径时,可与传统制备的结晶氧亚甲基均聚物、共聚物和三元共聚物混合,以改善后者的冲击性能。