Thermotropic chiral nematic liquid crystalline copolymers
    1.
    发明授权
    Thermotropic chiral nematic liquid crystalline copolymers 失效
    热致度手性向列型液晶共聚物

    公开(公告)号:US5332522A

    公开(公告)日:1994-07-26

    申请号:US55120

    申请日:1993-04-29

    摘要: A thermotropic chiral nematic liquid crystalline copolymer composition comprises ##STR1## wherein --NEM-- and --NEM'-- are each independently nematogenic units of formula ##STR2## wherein R is H or CH.sub.3, --Q-- is an alkylene radical having 1 to about 8 carbon atoms,--X-- is --O--, --S--, or --CH.sub.2 --, --Y-- is ##STR3## --Z is --CN, --NO.sub.2 or --N.dbd.C.dbd.S, q and r are each independently 0 or 1;wherein --CHI-- is a chiral unit of formula ##STR4## wherein R is H or CH.sub.3, --Q'-- is an alkylene radical having 1 to about 8 carbon atoms,--X'-- is --O--, --S--, or --CH.sub.2 --,--Z' is an alkoxy, aralkoxy, alkylamino, or aralkylamino radical having 4 to about 12 carbon atoms and containing at least one asymmetric carbon atom,q' and r' are each independently 0 or 1;and wherein x is the mole fraction of chiral units and (y+y') is the total mole fraction of nematogenic units in said copolymer composition, and the ratio of x to (y+y') is from about 1:50 to 1:1.This compolymer composition is employed to form an optical device.

    摘要翻译: 热致的手性向列型液晶共聚物组合物包含其中-NEM-和-NEM'-各自独立地具有式(II)的制剂单元,其中R是H或CH 3,-Q-是亚烷基 具有1至约8个碳原子的基团,-X-为-O-,-S-或-CH 2 - , - Y - 为-CN,-NO 2或-N = C = S,q 和r各自独立地为0或1; 其中-CHI-是式(III)的手性单元,其中R是H或CH 3,-Q'是具有1至约8个碳原子的亚烷基,-X'是-O-,-S - 或-CH 2 - , - Z'是具有4至约12个碳原子并含有至少一个不对称碳原子的烷氧基,芳烷氧基,烷基氨基或芳烷基氨基,q'和r'各自独立地为0或1; 并且其中x是手性单元的摩尔分数,并且(y + y')是所述共聚物组合物中的引产单元的总摩尔分数,并且x与(y + y')的比率为约1:50至1 :1。 该共聚物组合物用于形成光学装置。