公开(公告)号：US06409937B1

公开(公告)日：2002-06-25

申请号：US09537248

申请日：2000-03-28

申请人： Vadakkethonippurathu Sivankutty Nair Prasad ,  Chennakkattu Krishna Sadasivan Pillai ,  Marayil Ravindranathan

发明人： Vadakkethonippurathu Sivankutty Nair Prasad ,  Chennakkattu Krishna Sadasivan Pillai ,  Marayil Ravindranathan

IPC分类号： C09K1920

CPC分类号： C08G63/605 ,  C08G63/81 ,  C08G63/826 ,  C08G63/83 ,  C08G63/85 ,  H05K1/0326

摘要： The invention relates to a process for the preparation of melt processable liquid crystalline terpolyesters of the general formula I by the in situ acetylation of a monomer selected from (4-hydroxyphenyl) acetic acid/ 3(4-hydroxyphenyl)propionic acid and hydroquinone/4,4′-biphenol/2,6-naphthylene diol followed by acidolysis polycondensation with or without a solvent and a catalyst, under reduced pressure for the efficient removal of acetic acid to effect higher molecular weight formation. Post polymerisation is effected at higher temperatures below the decomposition temperature purification by soxhlet extraction using solvent mixtures selected from acetone-alcohol, acetone-methylethyl ketone.

摘要翻译： 本发明涉及通过选自（4-羟基苯基）乙酸/ 3（4-羟基苯基）丙酸和氢醌/ 4的单体的原位乙酰化制备通式I的可熔融加工的液晶三聚酯的方法， 4'-联苯酚/ 2,6-亚萘基二醇，然后在有或没有溶剂和催化剂的情况下在减压下进行酸解缩聚以有效除去乙酸以实现更高分子量的形成。 后聚合在低于分解温度的较高温度下通过使用选自丙酮 - 醇，丙酮 - 甲基乙基酮的溶剂混合物的索格利特萃取进行。