申请人:ALBEMARLE CORPORATION
公开号:EP0558040A2
公开(公告)日:1993-09-01
Organophosphorus compounds are stabilized against decomposition during and after recovery from their synthesis reaction mixtures by the addition to the synthesis reaction mixture of at least 0.5% by weight of an acid scavenger, based on the weight of the organophosphorus compound, before allowing the organophosphorus compound to crystallize. The invention is of particular value in the stabilization of 2,2'-alkylidenebis(dialkylphenyl)fluorophosphites, such as 2,2'-ethylidenebis(4,6-di-t-butylphenyl)fluorophosphite, which is rendered more suitable for use as a stabilizer for organic polymers, e.g., polycarbonates, by the practice of the invention.
在使有机磷化合物结晶之前,向合成反应混合物中加入至少 0.5%(按有机磷化合物重量计)的酸清除剂,可稳定有机磷化合物,使其在合成反应期间和从合成反应混合物中回收后不会分解。本发明对稳定 2,2'-亚烷基双(二烷基苯基)亚氟磷酸盐,如 2,2'-亚乙基双(4,6-二叔丁基苯基)亚氟磷酸盐具有特殊价值,通过本发明的实践,亚乙基双(4,6-二叔丁基苯基)亚氟磷酸盐更适合用作有机聚合物,如聚碳酸酯的稳定剂。