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    • 15. 发明授权
    • High birefringence liquid crystal compounds
    • 高双折射液晶化合物
    • US5626792A
    • 1997-05-06
    • US301121
    • 1994-09-06
    • Michael WandWilliam N. ThurmesKundalika Mor e Rohini T. Vohra
    • Michael WandWilliam N. ThurmesKundalika Mor e Rohini T. Vohra
    • C09K19/02C09K19/58C09K19/52C09K19/06C09K19/32C09K19/34
    • C09K19/0225C09K19/582
    • High birefringence liquid crystal dopants having the formula:R.sub.1 X--C--.tbd.--D--Twherein C and D, independently of one another, are aromatic ring systems each of which has one or two 5-member or 6-member carbon rings wherein one or two carbons of any ring in C or D can be substituted with a nitrogen, oxygen or sulfur atom and wherein any ring in C or D can be substituted with one or two halogen atoms; T is a halogen, haloalkyl, haloalkoxy, vinylhalide or a group YR.sub.2 where Y is a single bond, double bond, triple bond, --COS--, --CS.sub.2 --, --CH.dbd.CH--CO--S--, --CH.dbd.CH--CS--S-- or --CH.dbd.CH--CO--O-- group; X is a single bond, double bond, triple bond, O or S atoms or a cyclohexane or cyclohexene group, Z--Q--W, where Q is a cyclohexane or cyclohexene ring in which one or two of the ring carbons can be replaced with an O atom or in which one or more of the ring carbons can be substituted with a halogen atom or a cyano group, Z is a single bond or an O or S atom and W is a single bond, a --CH.sub.2 -- group, a --CH2--CH.sub.2 -- group, or a --CH.sub.2 --O-- group; and R.sub.l and R.sub.2 are, independently of one another, alkyl groups having from about 3 to about 20 carbon atoms in which one or more --CH.sub.2 -- groups can be halogenated, two neighboring --CH.sub.2 -- groups can be substituted with an epoxide, or one or more non-neighboring --CH.sub.2 -- groups can be substituted with a double bond, triple bond, an O atom, a S atom, or a silyl group SiR.sub.A R.sub.B wherein R.sub.A and R.sub.B, independently of one another, can be alkyl or alkenyl groups having 1 to about 6 carbon atoms are provided. More specifically, high birefringence dopants that are alkynyl tolanes dialkynyl tolanes and tolanes having cinnamate ester tails and derivatives of those tails are provided. High birefringence dopants also possess UV stability, IR clarity and other properties that affect LC properties.
    • 具有下式的高双折射液晶掺杂剂:R1X-C-3BOND-D-Twherein C和D彼此独立地为芳族环系,其中每一个具有一个或两个5-构件或6-构成的碳环,其中一个或 C或D中的任何环的两个碳可以被氮,氧或硫原子取代,并且其中C或D中的任何环可以被一个或两个卤素原子取代; T是卤素,卤代烷基,卤代烷氧基,乙烯基卤或YR2,Y是单键,双键,三键,-COS-,-CS2-,-CH = CH-CO-S-,-CH = CH- CS-S-或-CH = CH-CO-O-基; X是单键,双键,三键,O或S原子或环己烷或环己烯基,ZQW,其中Q是环或环己烯环,其中一个或两个环碳原子可被O原子取代或 其中一个或多个环碳可以被卤素原子或氰基取代,Z是单键或O或S原子,W是单键,-CH 2 - 基,-CH 2 -CH 2 - 基团或-CH 2 -O-基团; 并且R 1和R 2彼此独立地为具有约3至约20个碳原子的烷基,其中一个或多个-CH 2 - 基可以被卤化,两个相邻的-CH 2 - 基团可被环氧化物取代,或一个 或更多不相邻的-CH 2 - 基团可以被双键,三键,O原子,S原子或甲硅烷基SiRARB取代,其中RA和RB彼此独立地可以是具有 提供1至约6个碳原子。 更具体地,提供了作为炔基甲苯二炔基甲苯的高双折射掺杂剂和具有肉桂酸酯尾部和那些尾部的衍生物的甲苯。 高双折射掺杂剂还具有影响LC性能的UV稳定性,IR透明度和其他性能。