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| Number | Title | Issue Date |
| 7956169 | Synthesis of novel azo-dyes and their use in oligonucleotide synthesis The invention provides a novel group of azo quencher compositions that are useful as quenchers of fluorescence and to methods for making and using them. The quenchers contain an azo bond and 1,3,3-trimethyl-2-methyleneindoline ring system. The quenchers can be deriv... | 06/07/2011 |
| 6399166 | Liquid crystal display and method A liquid crystal display has a first substrate plate and a second substrate plate, and a liquid crystal layer disposed between the plates. A polarizing coating, having molecules of one or more organic dyes capable of forming a lyotropic liquid crystalline... | 06/04/2002 |
| 6049428 | Dichroic light polarizers The present invention provides dyes of formula I-XXXIV, described in detail below, and dichroic light polarizers based on the dyes. In the dichroic light polarizers of this invention the dye molecules are aggregated into particles oriented in a predetermi... | 04/11/2000 |
| 5929216 | Benzothiazolium containing azo dyes useful for dyeing polyacrylonitrile Disclosed are dyes having the formula ##STR1## in which R1 is C1 -C4 alkoxy or chlorine, R2 is C1 -C4 alkyl, R3 is C1 -C4 alkyl, R4 is C1 -... | 07/27/1999 |
| 5635607 | Cationic or basic azo dyes consisting of an amino benzothiazole diazo component and a disubstituted aniline component, which dyes contain at least one aromatic radical The cationic or basic aminobenzothiazole dyes disclosed herein are particularly suitable for dyeing paper. Paper is dyed with these dyes in blue or violet shades of good fastness properties.... | 06/03/1997 |
| 5591833 | Colorants and intermediates therefor having branched poly(oxyalkylene)moieties, and their manufacture Colorants and compositions useful as a fugitive or permanent colorant for a variety of substrates, or as intermediates for their manufacture, and having one or more improved properties of enhanced aqueous washability, compatibility with and non-extractibi... | 01/07/1997 |
| 5290921 | Intermediates and colorants having primary hydroxyl enriched poly (oxyalkylene) moieties and their preparation The present invention provides primary hydroxyl enhanced colorants having markedly improved reactivities in e.g., polyurethane foams for imparting permanent coloring thereto, the colorants having the formula C--(Z)1-4 are provided wherein C is an az... | 03/01/1994 |
| 5264560 | Preparation of quaternized azo dyes Quaternized azo dyes whose diazo components are derived from a five-membered nitrogen-containing aromatic aminoheterocycle and whose coupling components are derived from the aniline series are prepared by reacting to corresponding neutral dye-bases with a... | 11/23/1993 |
| 5073634 | Tetrachloroferrates of basic dyes Basic dyes of the formula Chr.sym.[FeCl4 ].crclbar. where Chra is a dye cation are useful for dyeing acrylonitrile polymers or acid-modified polyesters.... | 12/17/1991 |
| 4997918 | Benzthiazolium azo dyes Novel cationic azo compounds of the formula ##STR1## wherein R1 is C1 -C4 -alkylene, R2 is C1 -C4 -alkyl, R3 is C1 -C4 -alkyl, R4 is hydrogen, C | 03/05/1991 |
| 4927917 | Quasi-liquid crystals There are provided compounds which give quasi-liquid crystals, which comprise a mesogenic group, which can contain bridging groups, a bridging group and a spiropyran moiety having a 2H pyran ring, a terminal group being attached to the mesogenic group. Th... | 05/22/1990 |
| 4925926 | Preparation of cationic azo or hydrazone dyes in which the alkylation and the separation of the cationic dye are carried out continuously The invention relates to a continuous process for the preparation of cationic azo or hydrazone dyes from heterocyclic diazo components and coupling components. The diazo component is diazotised in water and an acid, the diazo solution is coupled with the ... | 05/15/1990 |
| 4818815 | Cationic 1,2,3-thiadiazole-azo-aniline or tetrahydroquinoline compounds The invention relates to novel 1,2,3-thiadiazole-axo compounds of formula ##STR1## wherein R is unsubstituted or substituted alkyl or alkenyl, R1 is hydrogen or unsubstituted or substituted alkyl or alkenyl, R2 is hydrogen or unsubstitute... | 04/04/1989 |
| 4714606 | Method of staining and identifying cells and compositions thereof This invention is directed to the cytology of blood, bone marrow and lymph node cells and the method of differentiating, identifying and enumerating said cells among a plurality of cells of hematopoietic origin. More specifically, the invention is directe... | 12/22/1987 |
| 4687842 | Monoazo compounds having an imidazolium-2 group linked through an azo radical to a substituted phenyl group Compounds of the formula ##STR1## wherein each of R and R1 is independently hydrogen, C1-4 alkyl, phenyl or phenyl substituted by 1 to 3 C1-4 alkyl, C1-4 alkoxy or halo substitutents or R and R1 ... | 08/18/1987 |
| 4638053 | Process for the preparation of chlorozincate salts of benzo thiazolium azo dyestuffs by alkylating with dialkylsulfate in aqueous medium in the presence of Zn-containing acid acceptor at pHࣘ7 Chlorozincate salts of benzothiazonium azo compounds are prepared by reacting benzothiazolium azo compounds with an dialkylsulfate having from 1 to 4 carbon atoms in the alkyl radicals, which process comprises carrying out the reaction in an aqueous mediu... | 01/20/1987 |
| 4557732 | Process for spin-dyeing of acid-modified polymers of acrylonitrile by the wet-spinning procedure using quaternary ammonium or cyclammonium dyestuffs of low M value and high cation weight having two or three said ammonium or cyclammonium groups Improvement of a process for spin-dyeing acid-modified polymers or copolymers of acrylonitrile in which cationic quaternary dyestuffs are added to the spinning mass and spun according to the wet-spinning procedure. The improvement is characterized by usin... | 12/10/1985 |
| 4551212 | Bath and process for the electrodeposition of micromachinable copper and additive for said bath It has been found that an additive comprising a mixture of phenazine dyestuffs in the combination from about 30 to 40 percent by weight of (a) a Janus Green B type dyestuff or a mixture thereof and (b) from about 70 to 60 percent by weight of Safranine T,... | 11/05/1985 |
| 4541831 | Dustless, water-soluble, solid, dyestuff or optical brightener compositions and a process of production Described is a process for the production of substantially dustless water-soluble dye or optical brightener compositions, which process comprises mixing a dry, solid inorganic salt, heated to at least 50° C., with a mixture of at least one dye or optical... | 09/17/1985 |
| 4536185 | Liquid preparation of cationic dye mixture containing aliphatic carboxylic acid for black dyeing A novel liquid preparation containing a mixture of dyes according to claim 1, an aliphatic carboxylic acid, and optionally water and organic solvents. This novel preparation is storage-stable and temperature-stable and can be used in particular for dyeing... | 08/20/1985 |
| 4382801 | Process for spin dyeing polymers or copolymers of acrylonitrile with quaternized heterocyclic diazo dye and tetrafluoro-borate anion The invention relates to a process for spin dyeing polymers of acrylonitrile or copolymers containing predominantly acrylonitrile, which process comprises adding to the spinning solution a monocationic dye salt of the formula ##STR1## wherein D ... | 05/10/1983 |
| 4292238 | Alkylation of benzthiazole-azo-phenylamine dyestuffs Process for the preparation of benzthiazole dyestuffs by alkylation of compounds of the formula ##STR1## wherein R1 and R2 denote hydrogen, alkyl, alkenyl, cycloalkyl, aryl or aralkyl, or, conjointly with the N-atom, form a ring... | 09/29/1981 |
| 4289693 | Azo dyes having a quaternized heterocyclic diazo component radical and an optionally substituted aryloxyalkyl substituent on the amino group of the coupling component radical Basic dyes free from sulfo groups of the formula ##STR1## in which Q signifies an unsubstituted or substituted phenyl or naphthyl radical, R1 and R2 signify hydrogen, unsubstituted or substituted alkyl, phenyl or cycloalkyl, R | 09/15/1981 |
| 4285859 | Azo compounds useful in a photographic dye diffusion transfer process Novel azo compounds and their preparation are provided. These compounds have the general formula ##STR1## wherein X is N or CR4 where R4 is a hydrogen atom or an optionally substituted alkyl or aryl group, Y is S.sym.... | 08/25/1981 |
| 4268438 | Cationic 1,3,4-thiadiazole dyestuffs Cationic 1,3,4-thiadiazole dyestuffs of the general formula ##STR1## wherein R denotes hydrogen or an alkyl, alkenyl, acyl, cycloalkyl, aryl, aralkyl, amino, alkylamino, dialkylamino, arylamino, aralkylamino or heterocyclic radical and R1 ... | 05/19/1981 |
| 4264496 | Concentrated aqueous solutions of cationic colorant and procedure for their preparation The present invention provides concentrated aqueous acid solutions of the colorant having the formula: ##STR1## in which A.crclbar. represents the formate, acetate or propionate anion. The solutions are prepared starting with the correspon... | 04/28/1981 |
| 4251440 | Monoazo compounds having a thiazolium or substituted thiazolium diazo component radical and a 1,4-phenylene coupling component radical having a C1-4 alkyl group in each ortho position Monoazo dyes of the formula ##STR1## is optionally substituted thiazolyl, benzothiazolyl, 1,2,4-triazolyl, indazolyl, imidazolyl or pyridyl or naphtho-[2,1-d]-thiazolyl, R1 is optionally substituted alkyl, phenylalkyl, cycloalkyl or alkeny... | 02/17/1981 |
| 4218369 | Cycloammonium-azo-phenyl-dyestuffs containing one cyanoethyl, carbamoylethyl or carbalkoxyethyl group on the phenyl radical The invention relates to new cationic azo dyestuffs which correspond to the general formula: ##STR1## in which R1 represents an alkyl radical or a substituted alkyl radical, R2 represents a hydrogen atom, an alkyl radical or a ... | 08/19/1980 |
| 4212803 | Cationic azo dyestuffs containing oxyalkylene substituent Cationic dyestuffs of the formula wherein D denotes the radical of a diazo component, K denotes the radical of a coupling component, m and n independently of one another denote 1 or 2, An.crclbar. denotes an anion and R denotes a radical of the general formulae wherein ... | 07/15/1980 |
| 4085098 | Azo dyes containing a heterocyclic ring having a quaternized nitrogen atom and at least one optionally substituted phenoxyalkyl or naphthyloxyalkyl substituent Disclosed are basic azo dyes, free from sulphonic acid groups, and of formula, ##STR1## in which Q signifies an unsubstituted or substituted phenyl or naphthyl radical, R1 signifies hydrogen, unsubstituted or substituted C1-4 al... | 04/18/1978 |
| 4082740 | Quaternary basic azodyestuffs containing a propenyl amino radical New basic azo dyestuffs of the formula ##STR1## where D.sup.(+) is the radical of an aromatic or heterocyclic diazo component containing a quaternary nitrogen atom, A is an aromatic radical or, together with the -(NR)-member of the formula, forms a h... | 04/04/1978 |
| 4051084 | Cationic dyestuffs Cationic dyestuffs of the formula ##STR1## wherein R represents alkyl, alkenyl, cycloalkyl or aralkyl, R1 represents hydrogen, alkyl, alkenyl, cycloalkyl or aralkyl, R2 represents alkylene, Y represents oxygen or sulphur, R3 re... | 09/27/1977 |
| 4039526 | Cationic dyestuffs containing quaternized benzthiazole and p-substituted amino azo phenyl moieties Dyestuffs of the formula ##STR1## wherein R represents alkyl, alkenyl, cycloalkyl or aralkyl, R1 represents hydrogen, alkyl, alkenyl, cycloalkyl or aralkyl R2 represents alkylene, of which the chain can be interrupted by O, Y represents -... | 08/02/1977 |
| 4039529 | Cycloaliphatic dicarbonyl containing azo dyestuffs An azo compound free from sulfonic acid groups of the formula ##STR1## wherein D is the radical of a diazo component, A is a p-phenylene radical which may be substituted, X is an --NH-- group, a sulfur atom or an oxygen atom, Y is a cycloaliphatic ra... | 08/02/1977 |
| 4028321 | Basic azo amino-phenylene dyestuffs A basic dyestuff of the formula ##STR1## wherein R1 is hydrogen, alkyl of 1 to 5 carbon atoms, hydroxyalkyl of 1 to 4 carbon atoms, cyanoalkyl of 1 to 4 carbon atoms in the alkyl moiety or chloroalkyl of 1 to 4 carbon atoms, R'2... | 06/07/1977 |
| 4014864 | Heterocyclic substituted azo dyestuff An azo compound that is free from sulphonic acid groups of the formula ##STR1## in which D represents the radical of a diazo component, A represents an optionally substituted, 1,4-phenylene radical, R1 represents an optionally substituted ... | 03/29/1977 |
| 4006127 | Cationic diazacyanine dyestuffs Dyestuffs of the formula ##STR1## WHEREIN A denotes a ring which contains at least one quaternary nitrogen atom; B denotes an isocyclic or heterocyclic radical; Y denotes a radical for completing a ring; R denotes hydrogen or alkyl; An - denote... | 02/01/1977 |
| 4002604 | Azo dyestuff including a 1,3 or 1,4-benzodioxan ring structure fused to a thiazole ring Azo dyestuffs devoid of carboxylic acid and sulphonic acid groups and of the formula I ##STR1## wherein A is the residue of 1,3 or 1,4-benzodioxan ring structure fused to the thiazole ring via the benzene ring, B is the residue of a para-couplin... | 01/11/1977 |
| 3991043 | Quaternization of benzthiazole-azo compounds A process for the manufacture of water soluble dyestuffs of the formula ##SPC1## Wherein R1 and R2 are independently selected from the group consisting of lower alkyl, hydroxy lower alkyl, cyano lower alkyl and phthalimide lower alky... | 11/09/1976 |
| 3985499 | Diazamerocyanines for dyeing keratinous fibers Some novel diazo compounds, and salts thereof, useful for dyeing keratinous fibers, particularly human hair are disclosed. Illustrative of these compounds are the methyl sulfate salts of 1'-(4'-N,N-dimethylaminobenzene) 2-azo 4-cyano 1-methyl pyridinium m... | 10/12/1976 |
