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    • 93. 发明授权
    • Electrooptical liquid crystal system containing dual frequency liquid
crystal mixture
    • 含有双频液晶混合物的电光液晶体系
    • US5621552A
    • 1997-04-15
    • US199193
    • 1994-02-28
    • David CoatesPatrick Nolan
    • David CoatesPatrick Nolan
    • C09K19/54G02F1/1334H01L29/04
    • C09K19/544G02F1/1334
    • The invention relates to an electrooptical liquid crystal systemwhich contains a dual frequency liquid crystal mixture and a further optically transparent polymeric medium between two electrode layers which optionally may be attached to substrates,in which the ordinary refractive index of the liquid crystal mixture essentially agrees with the refractive index of the polymeric medium n.sub.m and/or in which the quotient of the mass of the liquid crystal mixture and of the mass of the polymeric medium is 1.5 or more,which has a reduced transmission in the on-state compared to the off-state, andwhich is obtained by polymerization of a composition containing the dual frequency liquid crystal mixture and a precursor of the polymeric medium,characterized in that an electrical field is applied during the curing process which exhibits a frequency below the cross-over frequency of the dual frequency liquid crystal mixture so that the molecules of the dual frequency liquid crystal mixture are aligned essentially into the direction of the electrical field.
    • PCT No.PCT / EP92 / 01872 Sec。 371日期1994年2月28日 102(e)日期1994年2月28日PCT提交1992年8月17日PCT公布。 出版物WO93 / 05436 日期1993年3月18日本发明涉及一种电光学液晶系统,其包含双频液晶混合物和两个电极层之间的另外的光学透明聚合物介质,其可任选地附着到基底上,其中液体的常规折射率 晶体混合物基本上与聚合物介质nm的折射率一致,和/或其中液晶混合物的质量和聚合物介质的质量的商为1.5或更大,其中, 状态,其是通过聚合包含双频液晶混合物和聚合物介质的前体的组合而获得的,其特征在于在固化过程期间施加电场,其表现出低于 双频液晶混合物的交叉频率使得双频液体的分子发生哭泣 大部分混合物基本上与电场方向排列。
    • 94. 发明授权
    • Light modulating material comprising polymer dispersed liquid crystals
    • 包含聚合物分散液晶的光调制材料
    • US5518654A
    • 1996-05-21
    • US859737
    • 1992-06-12
    • David Coates
    • David Coates
    • C09K19/00C09K19/12C09K19/46C09K19/54G02F1/13G02F1/1333C09K19/52
    • C09K19/12C09K19/544
    • A light modulating material is disclosed, comprising a solid, light transmissive, polymeric matrix having dispersed within said matrix droplets of a liquid crystalline composition, wherein said composition is a mixture of at least 2 compounds, at least one of said compounds having general formula (I), where n is 1 or 2, the fluorine substituent(s) may be in any of the available substitution positions and R.sup.1 is C.sub.1-12 alkynyl, hydrogen, R, RO or RCO where R is alkyl or perfluoroalkyl and at least one other of said compounds having general formula (II), where m is 0 or 1 and R.sup.2 is hydrogen or C.sub.1-12 alkyl or alkoxy.
    • PCT No.PCT / GB90 / 01947 Sec。 371日期:1992年6月12日 102(e)日期1992年6月12日PCT 1990年12月13日PCT PCT。 公开号WO91 / 09092 日期:1991年6月27日。公开了一种光调制材料,其包含分散在液晶组合物的所述基质液滴内的固体,透光的聚合物基质,其中所述组合物是至少2种化合物,至少一种 的所述具有通式(I)的化合物,其中n为1或2,氟取代基可以是任何可用的取代位置,R 1是C 12-12炔基,氢,R,RO或RCO,其中R是 烷基或全氟烷基和至少另一个所述具有通式(II)的化合物,其中m为0或1,R 2为氢或C 1-12烷基或烷氧基。
    • 96. 发明授权
    • Electrooptical liquid crystal system
    • 电光液晶系统
    • US5476611A
    • 1995-12-19
    • US41422
    • 1993-03-31
    • Patrick NolanDavid Coates
    • Patrick NolanDavid Coates
    • C09K19/30C09K19/34C09K19/52C09K19/54G02F1/13G02F1/1333G02F1/1334C09K19/12
    • C09K19/544G02F1/1334
    • An electrooptical system containing a PDLC film is disclosed. The precursor of the PDLC film comprises(a) 30-85 wt. % of a liquid crystal mixture containing one or more compounds of the formula I ##STR1## wherein R, Z.sup.1, Z.sup.2, A.sup.1, A.sup.2, X.sup.2, X.sup.2, Q, n and Y are as defined herein,(b) 15-68 wt. % of the precursor of the polymer matrix at least comprisinga component A containing at least 5 wt. % of one or more at least difunctional thiol monomers and/or oligomers,a component B containing at least 10 wt. % of one or more at least difunctional monomers and/or oligomers of the ene type,a component C containing at least 3 wt. % of one or more monofunctional monomers and/or oligomers of the ene type with a molar mass of less than 250 g/mol,optionally a component D containing polymerizable compounds other than ene-type or thiol-type compounds; and(c) 0.1-5 wt. % of a radical photoinitiator, with the mass ratios given under (a), (b) and (c) being related to the mass of the precursor of the PDLC film and the mass ratios of the components A, B and C relating to the mass of the precursor of the polymer matrix.
    • 公开了一种含有PDLC膜的电光系统。 PDLC膜的前体包含(a)30-85wt。 含有一种或多种式I的化合物的液晶混合物,其中R,Z 1,Z 2,A 1,A 2,X 2,X 2,Q,n和Y如本文所定义,(b)15-68重量% 。 所述聚合物基质的前体的%至少包含含有至少5wt。 %的一种或多种至少双官能的硫醇单体和/或低聚物,组分B含有至少10wt。 %的一种或多种至少双官能单体和/或烯类的低聚物,组分C含有至少3wt。 %的一种或多种单体官能单体和/或低聚物,其摩尔质量小于250g / mol,任选地含有除ene型或硫醇型化合物之外的可聚合化合物的组分D; 和(c)0.1-5wt。 自由基光引发剂的%,(a),(b)和(c)给出的质量比与PDLC膜的前体的质量和与组分A,B和C有关的组分A,B和C的质量比 质量的聚合物基质的前体。