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| Number | Title | Issue Date |
| 7932366 | Synthesis of azo bonded immunoregulatory compounds Methods are disclosed for preparing compounds of Formula I: where R1, R3, and R4 are independently hydrogen or C1 to C4 alkyl, and R2 is: where R5 is selected from the group consisting of h... | 04/26/2011 |
| 7847073 | Method for producing a liquid formulation of salts of sulphonic-acid azo dyes A process for producing a liquid formulation of salts of sulfonated azo dyes by coupling an at least equimolar amount of diazotized aminoarylsulfonic acids I H2N—Ar—SO3H (I), where Ar is phenylene (which may be mono... | 12/07/2010 |
| 7488810 | Method for producing a liquid formulation of salts of sulfoacidic azo dyes A process for preparing a liquid formulation of salts of sulfonated azo dyes, comprising a) preparing vesuvin from m-phenylenediamine; b) without interveningly isolating the vesuvin coupling an at least equimolar amount of diazotized aminoarylsulfonic acids I | 02/10/2009 |
| 7160380 | Organic pigment fine-particle, and method of producing the same A method of producing a fine particle of an organic pigment, containing the steps of: flowing a solution of an organic pigment dissolved in an alkaline or acidic aqueous medium, through a channel which provides a laminar flow; and changing a pH of the solution in th... | 01/09/2007 |
| 7135266 | Preparation of azo colorants in microreactors and their use in electrophotographic toners and developers, powder coatings, ink jet inks and electronic medias The invention is directed to an electrophotographic toner or developer, powder coating, ink jet ink or an electronic media having an azo colorant prepared by conducting the diazotization of aromatic or hetaromatic amines or the azo coupling reaction or the diazotiza... | 11/14/2006 |
| 7097702 | Acidic mono azo dyestuffs Disclosed are novel dyestuff for printing recording materials, especially textile fiber materials, paper and papery substrates and plastic films and plastic transparencies by the inkjet printing process of the formula (I) wherein all substituents are defined in the ... | 08/29/2006 |
| 7074906 | Organic solvent-free process for the preparation of 2-(2-nitrophenylazo)phenols Provided is a novel one-pot, organic solvent-free process for the preparation of 2-(2-nitrophenylazo) substituted phenols. The 2-(2-nitrophenylazo) substituted phenols are precursors for hydroxyphenylbenzotriazole UV absorbers. ... | 07/11/2006 |
| 6992179 | Reactive orange dyes containing vinyl sulfones The present invention relates to a reactive orange dye containing vinyl sulfone and more particularly, to the dye which have 6(7)-alkoxycarbonylamino-4-hydroxy-2-naphthalenesulfonic acid as a chromophore and aminophenyl-β-ethylsulfone derivative as an azo coupler. ... | 01/31/2006 |
| 6884875 | Reactive blue dye containing a vinyl sulphone group The present invention relates to a reactive blue dye, and more particularly to a reactive blue dye represented by the following Formula 1, which is effective in black dyeing or printing of polyamide textiles, in particular, nylon fiber, | 04/26/2005 |
| 6852135 | Water-soluble fiber-reactive colorants, method for the production thereof, and use their use Dyes of the general formula (1): where M is hydrogen, alkali, ammonium or the equivalent of an alkaline earth metal ion, X is halogen, alkoxy or an N-containing heterocycle, Q is a grouping of the formula (e) where Y i... | 02/08/2005 |
| 6756486 | Non-migrating metallized disazo green shade yellow pigment Disclosed are green shade yellow pigments represented by the Formula I: wherein R1 and R2 are independently selected from hydrogen, hydroxy, halogen, an alkyl group having 1 to about 4 carbon atoms,... | 06/29/2004 |
| RE38531 | Tetrakisazo dyes, their production and use Tetrakisazo dyes of formula (I), as defined in claim 1, optionally in admixture with trisazo dyes of formula (X) as defined in claim 4, are valuable anionic dyes for the dyeing of substrates dyeable with anionic dyes, in particular for the dyeing of le... | 06/08/2004 |
| 6743901 | Preparation of liquid formulations of basic azo dyes A process for preparing liquid formulations of dyes of the general formula I where the variables are as defined in the specification by diazotizing an amine of the formula II | 06/01/2004 |
| 6583273 | Azo dyes, process for their preparation and their use for dyeing or printing natural or synthetic materials This invention relates to dyes of formula ##STR1## wherein R1 is hydrogen, halogen, C1 -C8 alkyl, --NH--CO--C1 -C4 alkyl or phenyl, R2 is hydrogen, halogen, C1 -C8 alkyl, C... | 06/24/2003 |
| 6548647 | Process for preparing azo colorants The invention provides a process for preparing azo colorants which comprises spraying one or more coupling components individually or in a mixture and one or more compatible diazonium salts individually or in a mixture, in their solution or suspension for... | 04/15/2003 |
| 6469147 | Preparation of azo colorants in microreactors Azo colorants are prepared by conducting the diazotization of aromatic or hetaromatic amines or the azo coupling reaction or the diazotization and the azo coupling reaction in a microreactor.... | 10/22/2002 |
| 6458936 | Fiber-reactive disazo compounds The invention is related to compounds according to the formula (I) ##STR1## and salts thereof, or mixtures of such compounds or of their salts, wherein the substituents have the meanings as defined in claim 1; these compounds are useful as fiber-reactive dyest... | 10/01/2002 |
| 6437104 | Preparation of disazo condensation pigments in microreactors A process for preparing disazo condensation pigments by diazotization of an aromatic amine, azo coupling with a coupling component to form an azocarboxylic acid or azodicarboxylic acid, formation of an azocarbonyl chloride or azodicarbonyl dichloride and ... | 08/20/2002 |
| 6326474 | Reactive black dyes containing acetoxyethyl sulfone moiety This invention relates to a reactive black dye containing acetoxyethyl sulfone compound and more particularly, to the reactive black dye containing acetoxyethyl sulfone compound of formula (1), which is characterized by lessening the loss of dyes in filte... | 12/04/2001 |
| 6307033 | Reactive blue dyes containing monochlorotriazine and acetoxyethyl sulfone groups The present invention relates to a bifunctional blue reactive dye and more particularly, to the bifunctional blue reactive dye with monochlorotriazine and acetoxyethylsulfone as reactive groups expressed by formula (1), wherein, M is alkaline metal atom, ... | 10/23/2001 |
| 6153734 | Oligomer azo colorants Oligomeric azo dyes having an alternating construction made up of tetrazo components and coupling components, containing in the molecule at least 2 units of the structure I ------[D--------K]------ (I) where D and K are as def... | 11/28/2000 |
| 6043349 | Tetrakisazo dyes, their production and use Tetrakisazo dyes of formula (I), as defined in claim 1, optionally in admixture with trisazo dyes of formula (X) as defined in claim 4, are valuable anionic dyes for the dyeing of substrates dyeable with anionic dyes, in particular for the dyeing of leath... | 03/28/2000 |
| 6028178 | Pigment for electrophotographic toners and developers Azo pigment of the formula (1) ##STR1## which has a specific surface area of the pigment powder of more than 45 m2 /g. The azo pigment is particularly suitable as colorant in electrophotographic toners and developers, and in powder coating... | 02/22/2000 |
| 5986075 | Process for the production of diazonium compounds with a low content of sodium ions The present invention relates to a process for desalting aqueous suspensions containing an organic diazonium compound and electrolytes containing Na ions, in which the aqueous suspension is passed through a semipermeable membrane.... | 11/16/1999 |
| 5910577 | Quinoxaline-monoazo-acetarylide pigment Compounds of the formula (I) ##STR1## in which R1 and R2 are identical or different and are Cl, COO(C1 -C4)-alkyl, CONH2, CONCH3, CON(CH3)2 or SO2 NRR'... | 06/08/1999 |
| 5883234 | Process for dyeing cellulosic materials with disazo dyestuffs The novel process for dyeing cellulosic materials with disazo dyestuffs of the formula ##STR1## in which the substituents NHR1 and NHR2 are in each case in the 6- and/or 7-position and R1, R2, m, n, p and q... | 03/16/1999 |
| 5808014 | Process for the preparation of arlazotetronic acid derivatives A process for the preparation of arylazotetronic acid derivatives of the general formula: ##STR1## in which a 3-chloro-4-hydroxy-2(5H)-furanone of the formula: ##STR2## is diazotized. The arylazotetronic acid derivatives are important inter... | 09/15/1998 |
| 5697985 | Process for the preparation storage-stable dye dispersions This invention relates to a process for the preparation of storage-stable dye dispersions of alkali metal salts of anionic azo direct dyes by (a) preparing an aqueous slurry of an alkali metal salt of an azo direct dye, said salt having a solubility in water a... | 12/16/1997 |
| 5637678 | Process for preparing azo dyes containing A2- (arylsulphonylamino)-pyrimidine group The invention provides a process for the production of azodyes and their derivatives by diazotization and coupling reactions and optionally further modification reactions, wherein a compound of formula ##STR1## in which E signifies an aromatic bivale... | 06/10/1997 |
| 5625042 | Diazo reactive dyestuffs, their preparations and use Novel reactive dyestuffs of the general formula ##STR1## in which A represents CH.dbd.CH, or CH2 --CH2 Z, in which Z denotes a substituent which can be split off under dyeing conditions, and in which the other groups have the meaning... | 04/29/1997 |
| 5616694 | Azo compound A compound of Formula (1) and salts thereof wherein the variables are as defined in the specification: Ar1 N.dbd.N-J-X-L-X-J-N.dbd.NAr2 (1) A compound of Formula (1) is suitable for use in the coloration of cellulosic subs... | 04/01/1997 |
| 5597905 | Preparation of benzothiazolylazoanilines Described is a process for preparing benzothiazolylazoanilines by diazotization of 2-aminobenzothiazoles in a mixture consisting essentially of phosphoric acid, sulfuric acid and water using customary diazotizing agents and subsequent addition of the reac... | 01/28/1997 |
| 5597387 | Water-soluble polyazo dyestuffs The present invention relates to water-soluble polyazo dyestuffs of the general formula I ##STR1## wherein Y, Z, m and M.sym.1 to M.sym.4 are as defined in claim 1, processes for dyeing leather and paper with the polyazo dyestuf... | 01/28/1997 |
| 5532345 | Fiber reactive phthalimidylazo dyes and use thereof Compounds of the formula ##STR1## in which the variables are as defined in the claims, which are suitable as fibre-reactive dyes for dyeing or printing widely varying fibre materials, are described.... | 07/02/1996 |
| 5498700 | Naphthylazonaphthol dyes which contain a 5-chloro-6-fluoropyrimidin-4-yl reactive group Reactive dyestuffs of the formula ##STR1## produce bluish red dyes having excellent fastness properties on hydroxyl- and amido-containing fibre material.... | 03/12/1996 |
| 5459245 | Fluorotriazine containing naphthylazonaphthyl monoazo reactive dyes Reactive dyestuffs which, in the form of the free acid, have the following formula ##STR1## in which the substituents have the meaning given in the description, are suitable for the dyeing and printing of hydroxyl- and amido-containing materials... | 10/17/1995 |
| 5412078 | Reactive pyridone-containing dyestuffs, their preparation and their use The reactive dyestuffs of the formula ##STR1## wherein the substituents have the meaning given in the description, are particularly suitable for dyeing naturally occurring and synthetic materials containing OH groups and/or amide groups.... | 05/02/1995 |
| 5354850 | Water-soluble phenylazo naphthylazonaphthyl compounds containing a dichloro-s-triazinyl amino group, suitable as dyes Water-soluble disazo compounds, a process for their preparation and their use as dyes. Disazo compounds are described which have the formula (1) given and defined below and are used in their function as fiber-reactive dyes for the dyeing of hydroxy- and/o... | 10/11/1994 |
| 5350838 | High temperature process for preparing fiber reactive dyes A process for preparing monoazo dyes by coupling a aromatic diazonium salt with an amino-4-hydroxy-naphthalene sulfonic acid derivative at a temperature of 40°-85° C. The process of the invention provides a isomerically purer dye.... | 09/27/1994 |
| 5284939 | Process for the preparation of highly concentrated solutions of cationic azo dyes There is described a process for the preparation of highly concentrated aqueous solutions of specific cationic azo dyes. The solutions are prepared by diazotising a diazo component in a solution which contains sulfuric acid, coupling the diazotised compon... | 02/08/1994 |
