Matches 451 - 500 out of 884 < 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 >
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5545747 Cyclobutanecarboxylic acid derivatives and liquid crystalline compositions containing them  
An optically inactive cyclobutanecarboxylic acid derivative of the general formula ##STR1## wherein R 1 is a hydrogen atom or a straight or branched chain alkyl group having 1-14 carbon atoms, R 2...
5543077 Nematic liquid-crystal composition  
The invention relates to a nematic liquid-crystal composition especially for active matrix displays with high voltage holding ratio, good low temperature stability and without reversed domains.
5538768 Liquid-crystalline material  
The invention relates to a liquid-crystalline material in the form of an anisotropic gel consisting of a polymerized liquid-crystalline material and a low-molecular weight liquid-crystalline...
5536443 Cyclic hydrocarbon derivative and liquid crystal composition containing the same  
A liquid crystal display comprising a compound of the formula ##STR1## wherein each of Y 1 and Y 2 is independently F, Cl, CN, OCN, SCN, OCF 3 , OCF 2 H, OCF 2 CF 3 , CF 3 , R, --OR, --COOR or...
5536442 Fluorinated liquid crystal compounds and liquid crystal medium containing same  
The invention relates to liquid crystal compounds having a terminal structure in accordance with formula 1, 2, 3 or 4: --A 3 --OCF 3 1 --A 2 --Q--CHF 2 ...
5529718 Smectic liquid-crystal mixture  
A smectic liquid-crystal mixture containing rod-shaped molecules having only one side chain and certain phenylpyrimidine derivatives. The liquid-crystal mixtures according to the invention are...
5525258 Trifluorophenylene compounds, process for their preparation, and their use in liquid-crystalline mixtures  
Trifluorophenylene compounds of the formula (I) ##STR1## in which ##STR2## are mesogenic radicals, are useful components for liquid-crystal mixtures.
5523440 Silacyclohexane compound, a method of preparaing it and a liquid crystal composition containing it  
There is provides a silacyclohexane compound and method of making same. The silacyclohexane compound has the following formula (1): ##STR1## wherein R denotes a linear-chain alkyl group with a...
5520846 Liquid-crystalline medium  
The invention relates to a liquid-crystalline medium based on a mixture of polar compounds of positive dielectric anisotropy, characterized in that it contains one or more compounds of the general...
5516454 Supertwist liquid crystal display  
Supertwist liquid crystal displays having outstanding properties are obtained if the nematic liquid crystal mixture is based on components selected from group A comprising compounds of the formulae...
5512208 Ferroelectric chiral smectic liquid crystal composition and liquid crystal device using same  
A ferroelectric chiral smectic liquid crystal composition, comprising at least one compound represented by the following formula (I): ##STR1## wherein R 1 denotes a linear or branched alkyl group...
5498365 Electrooptical liquid crystal system  
An electrooptical system which between 2 electrode layers contains a PDLC film comprising a liquid crystal mixture forming microdroplets in an optically isotropic, transparent polymer matrix, ...
5496499 Biphenylethanes and liquid-crystalline phase  
Biphenylylethanes of the formula I ##STR1## in which one of the radicals R 1 and R 2 is X and the other radical R 1 or R 2 is R--Y-- where X is H, halogen, --CF 3 , --OCHF 2 , --OCF 3 ,...
5486309 Chiral liquid crystal compounds  
Optically active compounds of formula (I), where X has a structure (II) and B is C 1 -12 alkyl, a chiral group or a group having a general structure (III), where R and R' are H, C 1 -12 alkyl,...
5482650 Liquid crystal compounds having perfluoroether terminal portions  
Fluorine-containing liquid crystal compounds comprise a fluorocarbon terminal portion having at least one catenary ether oxygen and a hydrocarbon terminal portion, the terminal portions being...
5478495 Ferroelectric liquid crystal composition  
A ferroelectric liquid crystal composition, comprising at least three mesomorphic compounds represented by the following formula (I): ##STR1## wherein C* denotes an asymmetric carbon atom; E...
5478497 Tetracyclic compounds and liquid crystalline mixtures containing them  
Compounds of the formula ##STR1## wherein rings A, B and C, Z 1 , Z 2 , Z 3 , R 1 , R 2 and R 3 are defined in the specification, their manufacture, liquid crystalline mixtures which contain such...
5474705 Chiral liquid crystal compounds having a perfluoroether terminal portion  
Fluorine-containing, chiral liquid crystal compounds comprise (a) an aliphatic fluorocarbon terminal portion containing at least two catenary ether oxygen atoms; (b) a chiral, aliphatic hydrocarbon...
5468421 Cyclohexane derivative and liquid crystal composition containing the same  
A liquid crystalline compound which has a low viscosity and is electrically and chemically stable and compatible with other known liquid crystalline compounds at low temperatures, and a liquid...
5458806 Fluoromethyl ketones and liquid-crystalline media  
Fluoromethyl ketones of the formula I ##STR1## are suitable as components of liquid-crystalline media wherein R is H, a substituted or unsubstituted alkyl or alkenyl radical having 1 to 15 carbon...
5456860 Matrix liquid-crystal display  
The invention relates to a matrix liquid-crystal display (MLCD) containing a liquid-crystal mixture based on dielectrically positive liquid-crystal compounds which have a polar end group with a...
5456859 Liquid crystal cyanoalkanes and cyanoalkenes  
There is disclosed a cyanoalkane and cyanoalkene of general formula (I) which shows liquid crystalline properties: wherein R and R 1 are independently C 1 -12 alkyl, alkoxy, perfluoroalkyl or...
5454974 Halobenzene liquid crystals  
Compounds of the formula ##STR1## wherein X 1 denotes fluorine or chlorine and X 2 denotes hydrogen, fluorine or chlorine; R 1 is 3E-alkenyl, 4-alkenyl, 2E-alkenyloxy or 3-alkenyloxy; n stands...
5453218 Liquid crystal compounds containing chiral 2-halo-2 methyl alkoxy tails  
This invention provides chiral nonracemic compounds of formula ##STR1## wherein * indicates a chiral carbon, R 1 and R 2 , independently of one another, can be an alkyl, alkenyl or alkynyl group...
5447656 Meta-substituted aromatic compounds having six-membered rings, for use in liquid-crystal mixtures  
Meta-substituted aromatic compounds having six-membered rings, for use in liquid-crystal mixtures Compounds of the formula I ##STR1## in which X is CH, CF or N, R 2 is, for example, an alkyl,...
5447657 Liquid crystal compounds  
The present invention provides compounds of the general formula: ##STR1## wherein R is an alkyl group with 1 to 12 carbon atoms or a group of the formula ##STR2## Ring A 1 is 1,4-phenylene, which...
5445764 Cyclobutane benzene derivatives  
The invention relates to methylenecyclobutane benzene derivatives of the formula I ##STR1## in which R 1 , A 1 , Z 1 , L 1 , L 2 , m, V, W, Y and n have the meaning given in claim 1, and to their...
5445763 3-fluoropyridines, process for their preparation, and their use in liquid-crystal mixtures  
A 3-fluoropyridine of the formula (I) ##STR1## in which the symbols have the following meanings: R 1 and R 2 , independently of one another, are, for example, H or straight-chain or branched...
5443756 Liquid crystal composition  
A liquid crystal composition contains 60 to 80 parts by weight of liquid crystal compounds represented by the following general formulas (1)-(3): ##STR1## where X 1 is CH 3 CHCHCH 2 CH 2 --...
5439612 Cyclohexylphenylpyrimidines, process for their preparation, and their use in liquid-crystalline mixtures  
Cyclohexylphenylpyrimidines of the formula (I) ##STR1## in which R 1 is straight-chain or branched, chiral or achiral alkyl or alkenyl having 2 to 16 carbon atoms, in which one or two nonadjacent...
5439613 Liquid crystal composition  
A liquid crystal composition which is a liquid crystal mixture of an achiral liquid crystal compound of the following formula (IV) with a chiral compound having an adsorptivity to adsorbents, not...
5431850 Nematic liquid-crystal composition for active matrix application  
The invention relates to a nematic liquid-crystal composition for active matrix displays with high voltage holding ratio and extremely good low temperature stability.
5426009 Polymeric composite material  
The invention relates to a polymeric composite material which: is based on a liquid crystal polymer component, exhibits a high glass transition temperature of at least 60° C. and a...
5422033 Phase transition-type liquid crystal composition  
A phase transition-type liquid crystal composition including a mixture of ester-type liquid crystal compound and chiral nematic liquid crystal compound having added thereto at least one of...
5422037 Ferroelectric liquid crystal compounds containing halogenated cores and chiral haloalkoxy tail units  
The subject application discloses chiral nonracemic compositions of the general formula: ##STR1## wherein R 1 is an achiral tail of two to sixteen carbons; Ar is an achiral FLC core of at least...
5419851 Difluoro-derivative compounds and liquid crystal compositions containing them  
The present invention provides a difluoro-derivative compound of the formula R 1 --(A 1 --Y 1 ) m --A 2 --CFCF--C.tbd.C--A 3 --(Y 2 --A 4 ) n --R 2 (wherein each of A 1 to A 4 is a...
5413734 4-cyano-3-fluorophenyl esters  
Compounds of the formula ##STR1## wherein ring A is trans-1,4-cyclohexylene, 1,4-phenylene, pyrimidine-2,5-diyl or trans-1,3-dioxane-2,5-diyl; n is either 0 or 1; ring B stands for 1,4-phenylene or...
5411676 Chiral dopants for liquid crystalline mixtures  
Optically active dopants of the formula ##STR1## wherein A represents an optically active group selected from 1,1'-binaphthyl-2,2'-diyl, --CHR 1 --CHR 2 -- or --CH(COOR 3 )--CH(COOR 4 )--; Z...
5407599 Cyclopropylaklyl or -alkenyl or heterocyclic compounds, process for their preparation and their use in liquid-crystalline mixtures  
Disclosed and claimed are liquid-crystalline cyclopropylalkyl or -alkenyl or heterocyclic compounds, process for their preparation, and their use in liquid-crystalline mixtures. The novel...
5405550 Compounds and methods based on [1.1.1]propellane  
Molecular bulding beams, liquid crystals, and surfactants in the form of compounds based on [1.1.1]propellane, including poly[1.1.1]propellanes. Molecular building beams having a telomeric or...
5403512 Vinyl compounds, and a liquid-crystalline medium  
Vinyl compounds of the formula I ##STR1## in which the variables are as described in the claims. The compounds are useful as components in liquid-crystalline media.
5401434 Cis-1,4-substituted 2-butene derivative  
A novel liquid crystal compound having an intermediate group of a cis-1,4-substituted 2-butenyl group, low viscosity and a broad mesomorphic temperature range is provided, which compound is...
5401437 Polymer dispersed liquid crystal for wide viewing angle  
The polymer dispersed liquid crystal according to the present invention comprises about 5 to about 40% by weight of liquid crystal mixture and about 60 to about 95% by weight of polymer, the...
5399290 Liquid crystals with (polysila) alkyl wing groups  
A compound of the general formula M--(CH 2 ) n --(O) m --[--D--B--] q --Y, (I) in which M represents a silicon radical having 2 to 5 silicon atoms which are linked together by bridging...
5399291 Liquid crystal compounds having a fluoroether terminal portion  
Fluorine-containing, chiral and achiral liquid crystal compounds comprise (a) an aliphatic fluorocarbon terminal portion comprising a perfluorinated or partially-fluorinated alkylene group and a...
5399292 Fluoro-substituted phenyl-cyclohexylacetylenes  
Fluoro-substituted phenyl-cyclohexylacetylenes have the formula: ##STR1## wherein R signifies alkyl, alkoxy, alkenyl or alkenyloxy with 1 or, respectively, 2 to 12 carbon atoms in which one CH 2 ...
5393459 Optically active compounds, and a liquid-crystalline phase  
The invention relates to optically active compounds of the formula I ##STR1## in which R is an alkyl or alkenyl radical having up to 15 carbon atoms which is unsubstituted, monosubstituted by --CN...
5391319 Liquid-crystalline mixture  
A liquid-crystalline mixture comprising two or more compounds of the general formula I, ##STR1## in which R 1 is straight-chain alkyl having 3, 5 or 7 carbon atoms, three or more compounds of the...
5389294 Chlorobenzene derivatives  
The invention relates to chlorobenzene derivatives of formula I ##STR1## wherein R 1 denotes an alkyl residue with up to 12 carbon atoms wherein one or two non-adjacent CH 2 -groups may also be...
5389296 Liquid crystal composition and liquid crystal device containing same  
A ferroelectric chiral smectic liquid crystal composition is provided with a fast response speed and a less temperature dependency of the response speed by containing at least one mesomorphic...
Matches 451 - 500 out of 884 < 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 >