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| Number | Title | Issue Date |
| 7351451 | Anthraquinone compound, liquid crystal composition, cell and display device employing the same A liquid crystal composition comprising at least one liquid crystal compound and at least one anthraquinone compound represented by formula (1) below: Formula (1) (wherein R2 to R8 each independently represents a hydrogen or substituent; Het is... | 04/01/2008 |
| 7220465 | Liquid crystal composition, anthraquinone compound and liquid crystal device employing the composition A novel liquid crystal composition is disclosed. The composition comprises at least one liquid crystal and at least one compound represented by a formula (1), wherein R1 and R2 respectively represent an optionally substituted aryl group and opt... | 05/22/2007 |
| 7153350 | Water soluble colorants for ink jet printing In accordance with one embodiment of the present invention, a colorant in an ink jet ink formulation is disclosed. The colorant comprises an organic dye chromophore with at least one functional group Y containing one or more primary, secondary or tertiary amino grou... | 12/26/2006 |
| 6870063 | Thermally stable, anthraquinone colorants containing copolymerizable vinyl groups Disclosed are thermally-stable, anthraquinone colorant compounds (dyes) which contain one or more vinyl groups which render the compounds copolymerizable with reactive vinyl monomers to produce colored, polymeric compositions such as acrylate and methacrylate polyme... | 03/22/2005 |
| 6787658 | Thermally stable, anthraquinone colorants containing copolymerizable vinyl groups Disclosed are thermally-stable, anthraquinone colorant compounds (dyes) which contain one or more vinyl groups which render the compounds copolymerizable with reactive vinyl monomers to produce colored, polymeric compositions such as acrylate and methacrylate polyme... | 09/07/2004 |
| 6033742 | Liquid crystal display device A liquid crystal display device comprises, a pair of substrates having an electrode on a surface thereof, and a liquid crystal layer containing a liquid crystal and a dichroic dye, wherein the dichroic dye is an anthraquinone dye exhibiting 0.08 or less o... | 03/07/2000 |
| 5493036 | Fibre-reactive anthraquinone dyes, their preparation and the use thereof The invention relates to fibre-reactive anthraquinone dyes of formula ##STR1## wherein R1, R2, B, U, R and n are as defined in claim 1. The anthraquinone dyes of formula (1) are suitable for dyeing or printing hydroxyl group con... | 02/20/1996 |
| 5480873 | Pharmaceutical compounds Pharmaceutical compounds of the formula ##STR1## in which R1 and R2 are each hydrogen, hydroxyl, halo, C1-4 alkyl, C1-4 alkoxy, acyloxy, --O-glucoside, optionally substituted phenyl or optionally substitute... | 01/02/1996 |
| 5352247 | Anthraquinone dyes, their preparation and their use Anthraquinone dyes of the formula ##STR1## in which A, R1, R2, R3 and n are as defined in claim 1, produce dyeings having good fastness properties on nitrogen-containing or hydroxyl-containing fibre materials.... | 10/04/1994 |
| 5034547 | Anthraquinone dyes having alkylsulfonylamino substituents New anthraquinone dyes, free of water-solubilizing groups such as --SO3 H and --CO2 H comprise anthraquinone substituted with one or more identical or different groups of the formula --NHSO2 R, wherein R is a substituted o... | 07/23/1991 |
| 5030387 | Organic conductive complex An organic conductive complex comprising an electron donor and an electron acceptor, the electron donor being an anthraquinone derivative represented by formula (1): ##STR1## wherein X1, X2, X3 and X4, whi... | 07/09/1991 |
| 4921959 | Anthraquinone compounds and polarizing film containing the same An anthraquinone compound represented by formula: ##STR1## wherein R and X are as defined in the specification, and a polarizing film containing the same. The anthraquinone compound exhibits satisfactory compatibility with organic polymers and high d... | 05/01/1990 |
| 4883611 | Dichroic coloring agents for liquid crystal displays Dichroic coloring agents which have a blue to blue-violet hue and have not been used to date for liquid crystal displays are disclosed. These coloring agents are represented by the following formula: ##STR1## wherein X is S or NH; R1 is a ... | 11/28/1989 |
| 4596666 | Aryl-mercapto anthraquinone dyestuffs, their preparation and use and dichroic material containing aryl-mercapto anthraquinone dyestuffs Anthraquinone dyestuffs of the formula ##STR1## in which R1 represents alkyl, aralkyl, --CO--X-alkyl, --CO-- X-aralkyl, --CO--X-aryl, --O-alkyl, --O-aralkyl, --O-- aryl, --CN, --NO2, --CF3, halogen or a heterocyclic r... | 06/24/1986 |
| 4543214 | Process for the preparation of bromoanthraquinones A process for the preparation of pure bromoanthraquinones by denitrobrominating corresponding nitroanthraquinones is described. The process comprises treating nitroanthraquinones of the formula I ##STR1## wherein X is hydroxy, mercapto, carboxy or ha... | 09/24/1985 |
| 4528113 | Anthraquinone dye and liquid crystal composition containing the dye An anthraquinone dye and a liquid crystal composition containing the dye are disclosed. The liquid crystal composition is preferably used in an electro-optic cell which enables a good color display utilizing the guest-host effect of the liquid crystal.... | 07/09/1985 |
| 4464282 | Organic materials A material suitable for a guest-host liquid crystal device comprises a solution of a liquid crystal material and a pleochroic dye wherein the pleochroic dye comprises at least one anthraquinone compound free from water solubilizing and ionic substituents ... | 08/07/1984 |
| 4455253 | Pleochroic anthraquinone dyes An anthraquinone dye free from water-solubilizing and ionic substituents of the general formula: ##STR1## wherein Q is NH2, OH, alkyl, aryl, NO2 or halo; n is 0 to 4; each X independently is H, --SR, --NZ1 Z2 or... | 06/19/1984 |
| 4446047 | Pleochroic anthraquinone dyes An anthraquinone dye from water-solubilizing and ionic substituents of the general formula: ##STR1## wherein Q is NH2, OH, alkyl, aryl, NO2 or halo; n is 0 to 4; each X independently is H, --SR, --NZ1 Z2 or Q; e... | 05/01/1984 |
| 4405211 | Liquid crystal compositions with pleochroic anthraquinone dyes A material suitable for a guest-host liquid crystal device comprises a solution of a liquid crystal material and a pleochroic dye wherein the pleochroic dye comprises at least one compound having a formula: ##STR1## wherein: R represents a group sele... | 09/20/1983 |
| 4328161 | Process for the preparation of 1-aminoanthraquinones A selective process for the preparation of 1-aminoanthraquinones from the corresponding 1-aminoanthraquinone-2-carboxylic acid by decarboxylation in an acid solution in the presence of iron or zinc as a catalyst.... | 05/04/1982 |
| 4328160 | Process for the preparation of 1-aminoanthraquinones A selective process for the preparation of 1-aminoanthraquinones from the corresponding 1-aminoanthraquinone-2-carboxylic acid by decarboxylation in basic solution in the presence of iron, tin or zinc as a catalyst.... | 05/04/1982 |
| 4324732 | Process for the preparation of monoaroylated 1,4-diaminoanthraquinones In a process for the preparation of monoaroylated 1,4-diaminoanthraquinone by contacting 1,4-diaminoanthraquinone with an aroyl halide in the presence of an organic solvent and an acid-binding agent and in the presence of a small amount of water at an ele... | 04/13/1982 |
| 4309221 | Anthraquinone derivatives Anthraquinone derivatives of the formula ##STR1## or of the tautomeric formula ##STR2## in which A denotes an anthraquinone radical which is free from sulphonic acid groups and is optionally further substituted and which preferably consists... | 01/05/1982 |
| 4294581 | Uniformly dyed water-swellable cellulosic fibers Uniformly dyed water-swellable cellulosic fibers which have been produced by contacting water-swellable cellulosic fibers successively or simultaneously with water, with ethylene glycol, propylene glycol or derivatives of these and with an essentially wat... | 10/13/1981 |
| 4226783 | -Chlorination process A process for -chlorination of side chains of electronegatively substituted aromatic compounds with dichlorine monoxide.... | 10/07/1980 |
| 4136100 | Anthraquinoid dyes Dyes of the formula ##STR1## where Y is alkyl of 3 to 18 carbon atoms or phenyl which is unsubstituted or substituted by chlorine, bromine, alkoxy of 1 to 4 carbon atoms, alkoxycarbonyl (where alkoxy is of 1 to 4 carbon atoms), phenoxy, benzoyla... | 01/23/1979 |
| 4128396 | Process for the improvement of dyeing properties of pigments of the anilino and arylmercapto anthraquinone series Process for the improvement of dyeing properties of pigments of the anilino and arylmercapto anthraquinone series for bulk dyeing linear polyesters by halogenation of unhalogenated or lower halogenated compounds of the formula ##STR1## WHEREIN A... | 12/05/1978 |
| 4126626 | 1-Nitroarylamino-5 or 8-phenoxy or phenylmercapto anthraquinone New arylaminoanthraquinones of the formula ##STR1## in which one X denotes an aryloxy or arylmercapto group, the other X denote hydrogen atoms, one Y denotes a nitro group and the other Y denotes a hydrogen atom and W denotes a hydrogen atom or a met... | 11/21/1978 |
| 4105680 | Process for the preparation of 1-aminoanthraquinones A selective process for the preparation of 1-aminoanthraquinones by decarboxylation of the corresponding 1-aminoanthraquinone-2-carboxylic acid in an alkaline solution with an alkali metal hydrosulfite.... | 08/08/1978 |
| 4082778 | Arylaminoanthraquinones An arylaminoanthraquinone of the formula ##STR1## in which one X, in the 5- or 8-position, denote either the radical of the formula ##STR2## or a hydrogen atom, the other X denote hydrogen atoms, alkoxy groups with 1-4 C atoms, aryloxy, ary... | 04/04/1978 |
| 4065478 | Process for the manufacture of ,'-aminonitroanthraquinones A process for the manufacture of ,'-aminonitroanthraquinones, from ,'-dinitroanthraquinones, wherein the ,'-dinitroanthraquinones are reacted with ammonia in dipolar aprotic solvents which are inert to ammonia, th... | 12/27/1977 |
| 4056544 | Anthraquinone compounds Compounds of the formula ##STR1## wherein R represents cycloalkyl or the ##STR2## group wherein R1 and R2 denote alkyl and Y denotes hydrogen, chlorine, bromine, amino, alkylamino, cycloalkylamino, aralkylamino, arylam... | 11/01/1977 |
| 4054587 | Preparation of chloroanthraquinones from nitroanthraquinones The nitro group of an -nitroanthraquinone is replaced by chlorine by reaction with an ionic chloride in a solvent in the presence of an acid or of a compound which eliminates an acid. The ionic chloride may be an alkali metal, alkaline earth metal,... | 10/18/1977 |
| 4013687 | Anthraquinone dispersing agents Dyestuffs of the formulae and wherein D is the radical of an anthraquinone dyestuff which is attached to Z through a carbon atom of an aromatic ring present in D; Z is a divalent bridging group; n is a positive integer having a value of 1 to 4; X is a div... | 03/22/1977 |
| 4012454 | Iodination process A decarboxylation process for substituting iodine atoms for silver carboxylate radicals which comprises reacting the silver salts of carboxylic acids with iodine under decarboxylation conditions.... | 03/15/1977 |
| 3975410 | Process for the manufacture of halogen-containing anthraquinoidal compounds, their use and new halogen-containing anthraquinoidal compounds Process for the manufacture of halogen-containing anthraquinoidal compounds being useful for bulk dyeing high molecular organic compounds and having the formula ##SPC1## Wherein A is an anthraquinoidal radical being free from nitro groups, X is --NH-... | 08/17/1976 |
| 3963763 | Anthraquinone dyestuffs Anthraquinone dyestuffs of the formula ##SPC1## In which X1 denotes hydroxyl or amino, X2 denotes hydroxyl, amino, alkylamino, cycloalkylamino, arylamino, acylamino, alkylmercapto or arylmercapto, R denotes hydrogen, alkyl, aralkyl, ... | 06/15/1976 |
