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公开(公告)号：US3971824A
公开(公告)日：1976-07-27
申请号：US585919
申请日：1975-06-11
CPC分类号： C09K19/2007
摘要： Liquid crystalline materials comprised of substituted phenyl p-benzoyloxybenzoates are useful in electro-optical elements. These materials have low crystal to mesophase transition temperatures and have a broad mesophase temperature range.
摘要翻译： 由取代的对苯甲酰氧基苯甲酸苯酯组成的液晶材料可用于电光元件。 这些材料具有低的晶体到中间相转变温度，并且具有宽的中间相温度范围。
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公开(公告)号：US3960752A
公开(公告)日：1976-06-01
申请号：US415196
申请日：1973-11-12
CPC分类号： C07C255/00 , C09K19/48
摘要： In a nematic liquid crystal composition, the improvement wherein said composition comprises predominantly by weight a mixture ofI. Compound I ##SPC1##wherein one of X and Y is a strong electronegative group and the other of X and Y is R.sup.4, R.sup.4 O-, ##EQU1## R.sup.4 being an alkyl radical having 1 to 18 carbon atoms; with at least one member selected from the group consisting of:Ii. a. a mixture resulting from the transiminization of at least one Schiff base of the formula:Compound II ##SPC2##with at least one Schiff base of the formula:Compound III ##SPC3##wherein R, R.sup.1, R.sup.2 and R.sup.3 are alkyl radicals having 1 to 18 carbon atoms.B. a mixture resulting from the transiminization of more than one type of Compound II with said at least one base of formula III, andC. a mixture resulting from the transiminization of more than one type of Compound III with said at least one Schiff base of formula II;said composition being characterized by a .DELTA..epsilon. of about +1 or greater.
摘要翻译： 在向列液晶组合物中，其改进在于所述组合物主要包含I化合物的混合物。其中X和Y中的一个是强电负性基团，X和Y中的另一个是R 4，R 4 O-，00并行平行 R4CO-或R4-OCO-，R4是具有1至18个碳原子的烷基; 与至少一个选自以下的成员：
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公开(公告)号：US3960748A
公开(公告)日：1976-06-01
申请号：US415197
申请日：1973-11-12
CPC分类号： C09K19/22
摘要： A nematic liquid crystal composition having a resistivity of about 1 .times. 10.sup.8 to 1 .times. 10.sup.10 ohm-cm and a broad mesophase comprising a mixture prepared by transiminization between at least one Schiff base compound of the formula ##SPC1##And at least one other Schiff base of the formula: ##SPC2##Wherein R, R.sup.1, R.sup.2 and R.sup.3 are alkyl radicals having 1 to 18 carbon atoms. Advantageously the Schiff bases I and II are subjected to transiminization at a molar ratio of about 5/1 to 1/5.
摘要翻译： 具有约1×10 8至1×10 10欧姆 - 厘米电阻率的向列型液晶组合物和宽中间相，其包含通过至少一种下式的席夫碱化合物与至少一种下式的席夫碱化合物之间的转化反应制备的混合物：式 ：
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