| Patents for C09B 41 - Special methods of performing the coupling reaction (551) |
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| 09/26/1995 | US5453542 Preparation of 4,6-diaminoresorcinol through a bisazoarylresorcinol intermediate |
| 08/31/1995 | WO1995023130A1 Preparation of 4,6-diaminoresorcinol through a bisazoarylresorcinol intermediate |
| 08/31/1995 | CA2183454A1 Preparation of 4,6-diaminoresorcinol through a bisazoarylresorcinol intermediate |
| 08/08/1995 | US5440060 Surface-active compounds based on alkoxylated fatty amines |
| 07/25/1995 | US5436322 Diazotization of nitroamine and reaction with phenol in the presence of surfactant dispersant |
| 07/04/1995 | CA1336142C Specifically influencing the triboelectric effect of azo pigments |
| 05/30/1995 | US5420315 Surface-active compounds based on modified castor oil fatty substances |
| 05/23/1995 | US5417881 Low viscosity and nonsettling mixture with hydrogen chloride and water; storage stability |
| 05/03/1995 | EP0651026A1 Process for the manufacture of azo dyes |
| 03/23/1995 | DE4432546A1 Azo coupling of 2-nitroanilines with 2,4-disubstituted phenols |
| 03/16/1995 | WO1995007318A1 Dye mixtures containing azo dyes having the same colour and a coupling component from the diaminopyridine series |
| 02/28/1995 | US5393306 Dye mixtures, processes for their preparation and their use |
| 02/14/1995 | US5389524 Method and a system for quantitatively monitoring a chemical component dissolved in a liquid medium |
| 02/08/1995 | EP0550486B1 Process for producing concentrated aqueous solutions of anionic azo dyes |
| 01/17/1995 | US5382288 (Poly)amide |
| 12/13/1994 | US5372747 Modified block polymers, their preparation and their use |
| 10/04/1994 | US5352281 Use of azo pigment preparations for solvent-containing packaging intaglio and flexographic printing inks |
| 09/27/1994 | US5350838 High temperature process for preparing fiber reactive dyes |
| 08/31/1994 | EP0612813A1 Process for the preparation of (3-cyano-4-chloro-5-formylthien-2-ylazo) anilines |
| 08/18/1994 | WO1994018275A1 A high temperature process for preparing fiber reactive dyes |
| 06/08/1994 | EP0478643B1 Process for making azo-pigments |
| 05/25/1994 | EP0518909B1 Water-insoluble azo dyes, their manufacture and use |
| 05/18/1994 | EP0597376A1 3,3'-Dichlorobenzidine-dihydrochloride stable suspension |
| 05/11/1994 | EP0485474B1 A method and a system for quantitatively monitoring a chemical component dissolved in a liquid medium |
| 05/11/1994 | CA2102749A1 Stable 3,3'-dichlorobenzidine dihydrochloride suspension |
| 03/16/1994 | EP0587021A1 Use of preparations of azo-pigments containing solvents for intaglio printing and flexographic printing on packaging |
| 03/09/1994 | EP0585873A1 Method of preparing disazo pigments |
| 03/09/1994 | EP0585812A2 Surface active compounds based on alkoxylated fatty amines |
| 02/16/1994 | EP0582928A2 Surface active compounds based on modified castor oil fatty substances |
| 02/02/1994 | EP0581732A2 Mixtures of dyes, process for their manufacture and their use |
| 12/02/1993 | DE4303359A1 New reactive carbazole azo dyestuff cpds. with epoxy-propyl substit. - on nitrogen atom, used for dyeing natural and synthetic fibre, esp. wool, polyamide or polyester, PVC and epoxide resin |
| 11/30/1993 | US5266682 Esterified natural resin acids |
| 11/03/1993 | EP0567918A2 Azopigment preparation |
| 11/03/1993 | EP0567849A1 Process for preparing dyes |
| 10/06/1993 | EP0563975A1 Process for producing a monoazodye |
| 09/21/1993 | US5247071 Preparation of acetalized azo dyes |
| 09/07/1993 | US5243032 Preparation of azo pigments with low pcb content by coupling in the presence of olefins |
| 08/31/1993 | US5241058 Azo dye salts useful as masking couplers and preparation thereof |
| 07/07/1993 | EP0549968A1 Surface-active compounds based on modified oxalkylated novolaks, their preparation and their application |
| 06/02/1993 | EP0544495A1 Improved azo pigment compositions and process for their preparation |
| 05/28/1993 | CA2083892A1 Azo pigment compositions and process for their preparation |
| 03/23/1993 | US5196518 Dizonium slat coupled with hydroxy compound |
| 03/16/1993 | US5194597 Diallyldialkylammonium halide catalyst for coupling |
| 03/03/1993 | EP0529849A1 Coupling process |
| 03/02/1993 | US5190585 Production of pigment compositions |
| 02/10/1993 | CA2075608A1 Coupling process |
| 02/09/1993 | US5185435 Process for the preparation of bisazo pigments in halogen-free solvents |
| 01/05/1993 | US5176750 Azo pigment compositions and process for their preparation |
| 12/29/1992 | US5175258 Processes for the preparation of bisazo photogenerating pigments using an annealing step |
| 12/23/1992 | EP0519270A2 Process for the preparation of acetalised azo dyestuffs |
| 12/23/1992 | EP0518909A1 Water-insoluble azo dyes, their manufacture and use. |
| 11/24/1992 | CA1310634C Monoazo pigments, preparation and use thereof |
| 11/19/1992 | EP0513782A2 Nitrogen containing surface active agents derived from rosin acids |
| 11/10/1992 | US5162511 Nitrosating and diazotizing reagents and reactions |
| 09/29/1992 | US5151129 Precipitation of pigments and coupling |
| 08/12/1992 | EP0498769A1 Process for synthesizing bisazopigments in halogen-free solvents |
| 08/04/1992 | US5136098 Nitrosating and diazotizing reagents and reactions |
| 06/30/1992 | US5126435 Reacting azo compound and coupling agent in presence of zinc salt and inert gas; high speed, efficiency, simplification |
| 05/26/1992 | US5116955 Controlling the ratio of stream flow of the diazonium compound and base to the pH-adjusted aqueous solution of resorcinol and buffer system; coupling |
| 05/20/1992 | EP0485474A1 A method and a system for quantitatively monitoring a chemical component dissolved in a liquid medium. |
| 04/16/1992 | WO1992006140A1 Process for producing concentrated aqueous solutions of anionic azo dyes |
| 04/14/1992 | US5104416 Aqueous preparation of c.i. azoic diazo components with phosphoric acid, their preparation and use: diazotization and coupling on cellulose |
| 04/08/1992 | EP0478643A1 Process for making azo-pigments. |
| 04/07/1992 | US5102466 Production of pigments |
| 04/02/1992 | DE4030580A1 Verfahren zur herstellung von konzentrierten waessrigen loesungen von anionischen azofarbstoffen Process for the preparation of concentrated aqueous solutions of anionic azo dyes |
| 03/31/1992 | US5100989 Resin acid esters based on novolak oxyalkylates, their preparation and their use |
| 02/04/1992 | US5086168 Monoazo pigments derived from diazotized di- or trichloroanilines, preparation thereof and their use |
| 11/06/1991 | EP0455194A1 Method of preparing a disazo pigment |
| 10/09/1991 | EP0451094A1 Process for the production of pigments |
| 10/01/1991 | CA2039479A1 Process for the production of pigments |
| 09/19/1991 | WO1991013941A1 Water-insoluble azo dyes, their manufacture and use |
| 09/18/1991 | EP0446731A2 Process for the manufacture of azo dyes |
| 09/12/1991 | DE4007535A1 Wasserunloesliche azofarbmittel, ihre herstellung und verwendung Water-insoluble azo colorants, their production and use |
| 09/04/1991 | EP0445072A2 Preparation of metallised azo pigments |
| 06/25/1991 | US5026830 Process for the preparation of azo dyes by carrying out coupling in the presence of an alkali metal chloride and ammonium chloride |
| 04/30/1991 | US5011917 Process for preparing a stabilized composition of a lithium azo compound |
| 04/10/1991 | EP0421927A2 Preparation process of mono- and polyazo-dyes |
| 04/10/1991 | EP0421293A2 Aqueous preparations of C.I. azoic diazo components their manufacture and their use |
| 03/26/1991 | US5003051 Process for the preparation of metallizable monoazo dyes in the presence of ketones |
| 03/05/1991 | US4997917 Textile dyes |
| 02/19/1991 | US4994561 Process for the preparation of metallizable azo dyes carrying out coupling in an inert gas atmosphere in the presence of an ammonium salt |
| 01/29/1991 | WO1991002254A1 A method and a system for quantitatively monitoring a chemical component dissolved in a liquid medium |
| 01/29/1991 | CA2064037A1 Method and a system for quantitatively monitoring a chemical component dissolved in a liquid medium |
| 12/25/1990 | US4980459 Process for the manufacture of formulations of water-insoluble azo dyes |
| 12/23/1990 | WO1990015844A1 Process for making azo-pigments |
| 09/18/1990 | US4957841 Specifically influencing the triboelectric effect of azo pigments |
| 09/05/1990 | EP0385939A1 Process for the preparation of metallisable azodyes |
| 07/17/1990 | US4942225 Transfer to active methylene group an azo or diazo group |
| 07/03/1990 | US4939242 Process for the preparation of the lithium salt of a fiber-reactive azo dyestuff |
| 06/12/1990 | US4933436 Process for the preparation of stable aqueous solutions of anionic dyestuffs by conducting diazotization in the presence of an aromatic sulphonic acid |
| 05/22/1990 | US4927466 Azo pigments produced by reacting an azo compound with a coupler in the presence of a surfactant |
| 05/15/1990 | US4925926 Preparation of cationic azo or hydrazone dyes in which the alkylation and the separation of the cationic dye are carried out continuously |
| 04/24/1990 | US4920206 Process for making azo pigments |
| 04/24/1990 | US4920205 Process for making azo pigments |
| 04/17/1990 | US4917731 Water-soluble black trisazo dyestuffs |
| 04/11/1990 | EP0363322A2 Process for the manufacture of pigment preparations |
| 03/21/1990 | EP0359123A2 Process to influence selectively the triboelectric effect of azopigments |
| 03/06/1990 | US4906735 Process for the manufacture of a monoazo acetoacetylaminobenzimidazolone |
| 02/28/1990 | EP0356393A2 Process for the preparation of metallisable monoazo dyes |
| 11/15/1989 | EP0341593A2 Modified block polymers, their preparation and use |