申请人:Ciba-Geigy Corporation
公开号:US04808645A1
公开(公告)日:1989-02-28
Dibenzodioxaphosphepin and dibenzodioxaphosphocin derivatives are prepared by reacting selected 2,2'-biphenols with phosphorus trichloride in an organic solvent and then reacting the intermediate formed with a 1,4-dihydroxy-2,2,6,6-tetraalkylpiperidine. The phosphites formed are useful as stabilizers of organic polymers and lubricating oils, especially as process stabilizers for polyolefins, elastomers, polyesters and polycarbonates.
通过在有机溶剂中将选定的2,2'-联苯酚与三氯化磷反应,然后将形成的中间体与1,4-二羟基-2,2,6,6-四烷基哌啶反应,制备出二苯并二氧杂磷腙和二苯并二氧杂磷烷衍生物。形成的亚磷酸酯可用作有机聚合物和润滑油的稳定剂,特别是聚烯烃、弹性体、聚酯和聚碳酸酯的过程稳定剂。