发明授权
- 专利标题： Liquid-crystalline copolymer, process for the preparation of the same, diene compound used for the preparation of the same and process for the preparation of the diene compound
- 专利标题（中）： 液晶共聚物，其制备方法，用于制备其的二烯化合物和二烯化合物的制备方法
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申请号： US67135申请日： 1993-05-26
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公开(公告)号： US5380915A公开(公告)日： 1995-01-10
- 发明人: Kazuharu Morita , Satoshi Hachiya , Fumio Moriwaki , Hiroyuki Endo
- 申请人： Kazuharu Morita , Satoshi Hachiya , Fumio Moriwaki , Hiroyuki Endo
- 申请人地址： JPX Tokyo
- 专利权人： Idemitsu Kosan Co., Ltd.
- 当前专利权人： Idemitsu Kosan Co., Ltd.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX2-194065 19900724
- 主分类号： C07C69/773
- IPC分类号： C07C69/773 ; C08G77/38 ; C08G77/42 ; C08G77/50 ; C09K19/38 ; C09K19/40 ; C07C69/76 ; C08G77/04 ; C09K19/12 ; C09K19/20
摘要：
A liquid-crystalline copolymer comprising the repeating units represented by the following general formulas ##STR1## wherein each of r and p is an integer of 2 to 5, q is an integer of 0 to 3, m is an integer of 1 to 20, and R.sup.1 is ##STR2## R.sup.2 being --COOR.sup.3, --OR.sup.3 or --OCOR.sup.3 R.sup.3, ##STR3## each of R.sup.4 and R.sup.5 being --CH.sub.3 or a halogen atom, each of a and d being an integer of 0 to 10, b being an integer of 0 or 1, with the proviso that d is not 0 when R.sup.5 is --CH.sub.3, the repeating units [I] and [II] being present in the liquid-crystalline copolymer in a substantial molar ratio [I]:[II] of 1:1, exhibits ferroelectricity even at a temperature neighboring room temperature and having a high response speed to changes of external electric fields.
公开/授权文献
- US5973298A Circular film heater and porcelain enamel cooktop 公开/授权日：1999-10-26