N-正辛基硼酸二乙醇胺酯催化合成2-羟基-4-正辛氧基二苯甲酮

Synthesis of 2-Hydroxy-4-octyloxybenzophenone Catalyzed by N-octyl-diethanolamine borate

2-羟基-4-正辛氧基二苯甲酮是一种性能卓越的高效防老化助剂,能吸收240～340 nm紫外光,具有延缓泛黄和阻滞物理性能损失的功能,它广泛用于PE、PVC、PP、PS、PC、有机玻璃、丙纶纤维和聚醋酸乙烯酯等方面. 而且能为干性酚醛和醇酸清漆类、聚氨酯类、丙烯酸类、环氧类产品及汽车整修漆、粉末涂料、橡胶等制品提供良好的光稳定效果[1～4].

2-Hydroxy-4-octyloxybenzophenone was synthesized from 2,4-dihydroxybenzophenone and octyl chloride in the presence of N-octyl-diethanolamine borate, which was synthesized from diethanolamine borate and octyl bromide. When the molar ratio of 2,4-dihydroxybenzophenone to octyl chloride was 1∶1.05, reaction temperature was 155~160 ℃, reaction time was 8 h and m(N-octyl-diethanolamine borate)/m(2,4-(dihydroxybenzophenone))=0.05, the purity of the alkylated product was 98.5%, and the yield was 92.3%.