|
Match
|
Document |
Document Title |
|
|
5389291 |
3,6-disubstituted 2-halopyridines
The invention relates to halopyridines of the formula I ##STR1## in which L is Cl or F, and R 1 , R 2 , A 1 , A 2 , Z 1 , Z 2 , m and n are as defined in patent claim 1, and the use thereof as...
|
|
|
5389292 |
Difluoromethyl compounds
Compounds of the formula I R--(A 1 -A 1 ) m --A 2 --Q--CHF 2 I in which R, A 1 , Z 1 , m, A 2 and Q have the meaning given in Patent Claim 1 are suitable as components of...
|
|
|
5387371 |
Ferroelectric liquid-crystalline media, and their use in electro-optical devices
The invention relates to a ferroelectric liquid-crystalline medium having improved low-temperature behavior, pronounced bistability and a phase sequence containing the phases isotropic,...
|
|
|
5385692 |
Mesomorphic compound, liquid crystal composition, liquid crystal device, display apparatus and display method
A mesomorphic compound of the formula (I) according to claim 1 is suitable as a component for liquid crystal composition providing improved response characteristics.
|
|
|
5384070 |
Use of optically active tetrahydrofuran-2-carboxylic acid esters as dopants in liquid-crystal mixtures, liquid-crystal mixtures containing same and novel optically active tetrahydrofuran-2-carboxylic acid esters
The use of optically active tetrahydrofuran-2-carboxylic acid esters as dopants in liquid-crystal mixtures, liquid-crystal mixtures containing same and novel optically active...
|
|
|
5380461 |
Trans-dihalogenostilbene compounds and liquid crystal electro-optical devices using them
A trans-dihalogenostilbene compound of the formula: ##STR1## wherein each of A 1 to A 4 , which are independent from one another, is a trans-1,4-cyclohexylene group or a 1,4-phenylene group, which...
|
|
|
5380462 |
Cyclohexyl alkenoate compounds
Compounds having the Formula: ##STR1## wherein R 1 denotes an alkenyl group; A 1 and A 2 each independently represent 1,4-phenylene, which is unsubstituted or substituted with halogen and in...
|
|
|
5380460 |
Ferroelectric liquid crystal compounds containing chiral haloalkoxy tail units and compositions containing them
Chiral, nonracemic compounds of the general formula: ##STR1## wherein m and n are either both zero, both equal one or n is equal to one and m is equal to zero, X and Y and Z are halogens, R' is an...
|
|
|
5378393 |
Glassy chiral nematic liquid crystalline compositions of low molar mass and optical devices formed from same
A glassy thermotropic chiral nematic liquid crystalline composition comprises a glassy chiral nematic compound of low molar mass that includes a cycloaliphatic radical, a nematogenic moiety, and a...
|
|
|
5378394 |
Ferroelectric liquid-crystalline mixtures
The novel ferroelectric liquid-crystalline mixtures are based on at least two mixture components of the general formula (I) ##STR1## but additionally contain at least one optically active dope from...
|
|
|
5378392 |
Antiferroelectric liquid crystal composition
An antiferroelectric mixture comprising first and second components is provided, the mixing proportions of the first and second components being 60-97 wt. % and 3-40 wt. % based upon the total...
|
|
|
5374373 |
Ferroelectric liquid crystal device
A ferroelectric liquid crystal device having a pair of substrates each provided with voltage application means, an orientation control layer formed on at least one of the substrates, and a layer of...
|
|
|
5374371 |
Liquid crystal device
A liquid crystal device which comprises a pair of substrates having an electrode layer, at least one of said substrates being transparent, and a light-control layer supported between the substrate...
|
|
|
5372746 |
Fluoro-substituted tolane compounds and liquid crystalline mixtures containing same
Compounds of the general formula ##STR1## wherein ring A represents 1,4-phenylene, pyridine-2,5-diyl, pyrimidine-2,5-diyl, trans-1,4-cyclohexylene or trans-1,3-dioxane-2,5-diyl; Z signifies a...
|
|
|
5370821 |
Optically active compounds, liquid crystal compositions comprising said compounds, and liquid crystal optical modulators using said compositions
The invention relates to optically active compounds represented by the general formula ##STR1## wherein R 1 , R 2 , Q 1 , Q 2 , Q 3 , ##STR2## and M are defined as in the specification, methods and...
|
|
|
5370823 |
Pyrimidinecyclohexane derivatives, process for their preparation, and their use in liquid-crystalline mixtures
A liquid-crystalline bispyrimidinylcyclohexane of the formula (I) ##STR1## in which: R 1 and R 2 are identical or different and are, for example, straight-chain or branched alkyl, X 1 and X 2...
|
|
|
5370819 |
Conjugated enyne derivative and liquid crystal composition
A novel, conjugated enyne compound expressed by the following formula (I), which has superior characteristics as an L.C. material and is stable under a usually used environment, and a L.C....
|
|
|
5366657 |
Geminal dimethylalkyl compounds, process for their preparation and their use in liquid-crystalline mixtures
Geminal dimethylalkyl compounds, process for their preparation and their use in liquid-crystalline mixtures Geminal dimethylalkyl compounds of the formula (I) ##STR1## in which: R 1 is, for...
|
|
|
5366659 |
Ferroelectric liquid crystals containing pyrimidine and chiral compounds and liquid crystal compositions containing the same
A liquid crystal composition containing an optically active or a ferroelectric liquid crystal compound represented by the following formula: ##STR1## wherein A can be either --CH 2 -- or --CO--; R...
|
|
|
5364556 |
Halovinyl-derivatives
Compounds of general formula (I), wherein R signifies hydrogen, halogen, cyano, isothiocyanato, or alkyl, alkenyl or alkynyl with 1 to 15 carbon atoms, which is unsubstituted or substituted with at...
|
|
|
5360577 |
Oxaxoline derivatives
Optically active compounds of the general formula ##STR1## wherein n stands for the number 0 or 1; R 3 denotes a group R 4 or a group of the general formula ##STR2## A 1 , A 2 and A 3 each...
|
|
|
5360576 |
Chiral alkenylaryl 2,3-epoxyalkyl ethers, and the use thereof in liquid-crystalline mixtures
Compounds of the formula (I) in which the symbols have the following meanings: R 1 is straight-chain or branched (C 3 -C 2 )alkenyl containing a terminal double bond, it being possible for one or...
|
|
|
5356560 |
2-fluoroperfluoroalkylcyclohexene derivatives
2-Fluoroperfluoroalkylcyclohexene derivatives of the formula I ##STR1## where R is an alkyl or alkenyl radical having up to 18 carbon atoms which is unsubstituted or substituted by CN or by at...
|
|
|
5356559 |
Optically active piperazinyl derivatives as liquid crystals
Optically active compounds of the formula ##STR1## wherein rings A 1 and A 2 each independently signify pyridine-2,5-diyl, pyrimidine-2,5-diyl or 1,4-phenylene, which is unsubstituted or...
|
|
|
5356558 |
Tolane derivatives, liquid crystal compositions containing the derivatives and liquid crystal display devices using the compositions
A tolane derivative, a liquid crystal composition containing the derivative, and a liquid crystal display device including the composition, in which the tolane derivative is represented by the...
|
|
|
5354502 |
1,3-dioxane derivative and liquid crystal compositions containing it
A 1,3-dioxane derivative and a liquid crystal composition containing it as expressed by the general formula ##STR1## (where R is a straight chain alkyl group of carbon number 1 to 10, A is a single...
|
|
|
5354500 |
Optically active carboxylic esters of oxygen-containing heterocycles as doping substances in liquid crystal mixtures and liquid crystal mixtures containing them
Use of optically active carboxylic esters of oxygen-containing heterocycles as doping substances in liquid crystal mixtures and liquid crystal mixtures containing them. Optically active...
|
|
|
5348677 |
Electro-optical liquid crystal display element
The invention relates to an electro-optical liquid crystal display element containing a dielectric with at least two liquid-crystalline components, wherein the dielectric, for shortening the...
|
|
|
5348684 |
Organosilylalkyl or organosilylalkenyl compounds, process for preparing them and their use in liquid-crystalline mixtures
The novel silylalkyl or silylalkenyl compounds correspond to the general formula (I) ##STR1## Here the symbols A 1 , A 2 , A 3 denote aromatic or heteroaromatic molecular units such as...
|
|
|
5348685 |
Ferroelectric liquid crystal composition
This invention is directed to reduce the viscosity of a naphthalene type mixed liquid crystal and to improve display quality while maintaining a bookshelf layer structure. The ferroelectric liquid...
|
|
|
RE34726 |
Ferroelectric liquid crystal compositions containing chiral haloalkoxy tail units
The subject application discloses a chiral nonracemic composition of the general formula: R 1 --Ar--O--CH 2 --C*HX--C*HY--CH 2 --O--R 2 wherein R 1 is an achiral tail of two to sixteen...
|
|
|
5346647 |
Cyclohexane compounds used in liquid crystalline mixtures
Compounds of the formula ##STR1## wherein n stands for the number 0 or 1; R 1 denotes a group R 3 or R 3 --A 3 --Z 2 -- and R 2 denotes a group R 4 or R 4 --A 4 --Z 3 --; ring A 1 is...
|
|
|
5344585 |
Use of 4-fluoropyrimidine derivatives as component for ferroelectric liquid crystal mixtures
The use of a fluoropyrimidine derivative of the general formula (I) as component in a ferroelectric liquid crystal mixture comprising 2 to 20 components, ##STR1## in which the symbols have the...
|
|
|
5340497 |
Fluorophenylpyrimidines
The invention relates to fluorophenylpyrimidines of the formula I: ##STR1## where R 1 , R 2 , A 1 ,A 2 , Q 1 , Q 2 and n have the meaning specified in patent claim 1, and to their use as...
|
|
|
5338483 |
Anisotropic compounds having nematic phase and liquid crystal mixtures
Liquid crystal mixtures comprise one compound of the formula: ##STR1## wherein --A is selected from the group consisting of ##STR2## wherein R 1 is independently C1-12 straight or branched alkyl...
|
|
|
5336436 |
Optically active oxirane derivatives, and their use as dopes in liquid-crystal mixtures
Optically active oxirane derivatives containing a mesogenic molecular unit are suitable as dopes in liquid-crystal mixtures. They give liquid-crystalline ferroelectric phases having short response...
|
|
|
5334328 |
Chiral azetidinone derivatives, and their use as dopes in liquid-crystal mixtures
Azetidinones of the formula I ##STR1## in which, for example, R 1 is an alkyl or alkenyl radical, R 2 and R 3 are hydrogen or an alkyl or alkenyl radical, Z is hydrogen or (pseudo)halogen, A 1 ,...
|
|
|
5328638 |
Optically active esters of 5-ethyl- and 5-vinyl-1,3-dioxolane-4-carboxylic acid, their use as doping substances in liquid crystal mixtures and the liquid crystal mixtures containing the new esters
Optically active 1,3-dioxolane derivatives of the general formula (I) ##STR1## are suitable as doping substances in liquid crystal mixtures. The symbols in the general formula have the following...
|
|
|
5328639 |
Fluoroalkane derivative, its composition and liquid crystal device using the same
A liquid crystal composition, comprising: at least one optically active mesomorphic compound having an asymmetric carbon atom to which a fluorine atom is directly bonded.
|
|
|
5328637 |
Alkinyl-derivatives and their use in liquid crystalline mixtures
Compounds of the formula ##STR1## and liquid crystalline mixtures containing same.
|
|
|
5326871 |
Optically active pyrimidine compound, process for producing the same and liquid crystal composition containing the same
An optically active pyrimidine compound represented by general formula (I): ##STR1## wherein R represents a fluoroalkyl group having 1 or 2 carbon atom(s), R 1 represents an alkyl group having...
|
|
|
5326497 |
Nitrogen heterocycles and liquid crystalline mixtures containing them
Compounds of the general formula ##STR1## wherein R 1 is C 5 -12 -alkyl or C 5 -12 -alkenyl; R 2 is C 1 -9 -alkyl or C 2 -9 -alkenyl; provided that at least one of groups R 1 and R 2 is...
|
|
|
5326495 |
Tetrasubstituted methanes having liquid-crystalline properties
Novel tetrasubstituted methane derivatives of the general formula C[--Sp--M--R] 4 in which the radicals --Sp--M--R are the same or different, in which Sp is a spacer group selected from an...
|
|
|
5324450 |
Liquid crystalline compounds and process for production thereof
An optically active glycidyl ether, which is useful in making γ-lactone containing liquid crystalline compounds, the ether having the following formula: ##STR1## wherein R 1 is a group selected...
|
|
|
5324449 |
Substituted phenyl trifluoromethyl ethers
Substituted phenyl trifluoromethyl ethers of the formula I R 1 --(A 1 --Z 1 ) n --A 2 --Z 2 --A 3 --OCF 3 I in which R 1 , A 1 , Z 1 , n, A 2...
|
|
|
5322638 |
Halophenyl substituted dioxanes
Compounds of the formula ##STR1## wherein A 1 denotes a single covalent bond and A 2 denotes 1,4-phenylene or trans-1,4-cyclohexylene or A 1 denotes trans-1,4-cyclohexylene and A 2 denotes a...
|
|
|
5318720 |
Liquid crystal composition, liquid crystal device, display apparatus and display method
A mesomorphic compound represented by the following formula (I): ##STR1## wherein R 1 and R 2 respectively denote an alkyl group or alkoxy group each having 4-16 carbon atoms optionally...
|
|
|
5310499 |
Oxazolidinone derivatives, and the use thereof as dopes in liquid-crystal mixtures
Chiral oxazolidinones of the formula (I) or (II) ##STR1## in which R 1 is, for example, a straight-chain or branched alkyl radical having 1 to 16 carbon atoms or R 2 and R 3 are, for example,...
|
|
|
5308539 |
Ferroelectric liquid crystal composition and liquid crystal device using the same
A ferroelectric liquid crystal composition including: at least one optically active compound of the formula (I): ##STR1## where R 1 and R 2 are, the same or different, a straight or branched...
|
|
|
5308537 |
Mesogenic compounds
Mesogenic compounds with a ω-CF 3 -alkyl, ω-CF 3 -alkenyl or ω-CF 3 -alkinyl terminal group of formula I ##STR1## with the meaning of R, Z, Q, ##STR2## m, n and o being indicated in claim 1.
|