申请人:Knebel Joachim
公开号:US20100197955A1
公开(公告)日:2010-08-05
The present invention relates to a process for preparing butanediol dimethacrylates, which comprises the transesterification of butanediol with an ester of methacrylic acid in the presence of catalysts, wherein a combination comprising at least one lithium compound and at least one calcium compound is used as catalyst, at least one of the compounds of lithium and/or of calcium is an oxide, a hydroxide, an alkoxide having from 1 to 4 carbon atoms or a carboxylate having from 1 to 4 carbon atoms and at least part of the reaction is carried out in the presence of an effective amount of water. The process of the invention makes a particularly inexpensive preparation of butanediol dimethacrylates having a very high purity possible.
本发明涉及一种制备丁二醇二甲基丙烯酸酯的方法,包括在催化剂的存在下,将丁二醇与丙烯酸甲酯酯交换反应,其中所使用的催化剂为至少一种锂化合物和至少一种钙化合物的组合物,锂和/或钙的化合物中至少一种为氧化物、氢氧化物、含有1至4个碳原子的烷氧基或含有1至4个碳原子的羧酸盐,反应的至少一部分在水的有效量存在下进行。该发明的方法可以以特别低廉的成本制备出具有极高纯度的丁二醇二甲基丙烯酸酯。