Ferroelectric liquid-crystalline polymers, a process for their
preparation and their use in electrooptical components
    2.
    发明授权
    Ferroelectric liquid-crystalline polymers, a process for their preparation and their use in electrooptical components 失效
    铁电液晶聚合物,其制备方法及其在电光元件中的应用

    公开(公告)号:US5637254A

    公开(公告)日:1997-06-10

    申请号:US412617

    申请日:1995-03-29

    摘要: A ferroelectric, liquid-crystalline polymer is composed of repeating units of the formula (I) ##STR1## in which Y=H, CH.sub.3 or F,R.sup.1 =a radical having at least two chiral centers such as for example ##STR2## a=2 to 20, preferably 6 to 12, b,c,d,e and f=0 or 1 with the proviso that d+e+f=2 or 3,A.sup.1,A.sup.2 and A.sup.3 =for example, 1,4-phenylene, cyclohexylene or 2,5-pyrimidinediyl,M.sup.2 and M.sup.3 =CO--O, O--CO, CO--S, S--CO, CH.sub.2 --O, O--CH.sub.2, and ##STR3## These liquid-crystalline polymers have short response times and resistance to mechanical stresses.They can be prepared by free-radical polymerization.

    摘要翻译: 铁电液晶聚合物由式(I)的重复单元组成,其中Y = H,CH 3或F,R 1 =具有至少两个手性中心的基团,例如 a = 2至20,优选6至12,b,c,d,e和f = 0或1,条件是d + e + f = 2或3,A1,A2和A3 =例如,1,4-亚苯基 ,亚环己基或2,5-嘧啶二基,M2和M3 = CO-O,O-CO,CO-S,S-CO,CH2-O,O-CH2和这些液晶聚合物具有较短的响应时间 和耐机械应力。 它们可以通过自由基聚合制备。