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| Number | Title | Issue Date |
| 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 |
| 5510468 | Amino benzophenone dye There are described benzophenoneazo dyes of the formula ##STR1## where the ring A can be benzofused and a benzofused ring A can be overbridges, m is 1 or 2, K is the radical of a coupling component, Y is hydrogen or arylazo, one of the two radicals X... | 04/23/1996 |
| 5380859 | Pyridone compounds and the preparation of disulfonated pyridone compounds There are described benzophenoneazo dyes of the formula ##STR1## where the ring A can be benzofused and a benzofused ring A can be overbridged, m is 1 or 2, K is the radical of a coupling component, Y is hydrogen or arylazo, one of the two radicals X... | 01/10/1995 |
| 5278293 | Azo dyestuffs and intermediate products for their preparation Azo dyestuffs of the formula ##STR1## having the substituent meanings given in the description, are outstandingly suitable for dyeing and printing materials containing hydroxyl groups and amide groups.... | 01/11/1994 |
| 5270455 | Polyazo dyes containing resorcinol as middle component and metal complexes thereof A metal complex suitable as dyes for the dyeing of a wide range of textile and non-textile materials, particularly leather and fur, said metal complex of a compound of the formula ##STR1## in which D and D1, independently of one another, a... | 12/14/1993 |
| 5256194 | Color ink jet recording method A recording liquid containing a dye, glycerine, an aliphatic monohydric alcohol and water. The dye is a mixture of C.I. Food Black 2 and at least one compound selected from compounds which are represented by the following general formulas [I] and [II]: ... | 10/26/1993 |
| 5243033 | Fiber-reactive disazo and tetrakisazo halotriazinyl dyes Reactive dyes of the formula ##STR1## in which R1, R2 and R3, independently of one another, are C1 -C4 alkyl, C1 -C4 alkoxy, halogen, ureido, C1 -C4 ac... | 09/07/1993 |
| 5239063 | Fibre reactive azo dyestuffs Fiber reactive azo dyestuffs of the formula ##STR1## in which R=H or C1 -C6 alkyl, which can be substituted with OH, Hal, SO3 H or OSO3 H; Z=heterocyclic five or six membered ring; n, m=0, 1 or 2, wherein n+m=0,... | 08/24/1993 |
| 5196518 | Process for the preparation of metallizable azo dyes by carrying out the coupling in the presence of a buffer mixture A process for the preparation of azo dyes of formula ##STR1## wherein K is the radical of a coupling component of the benzene or naphthalene series or of the heterocyclic series, and the hydroxy group is attached to K adjacent to the azo group, X is ... | 03/23/1993 |
| 5175260 | Disazo dyes with hydroxysulfonylnaphthalene coupling components Disazo dyes suitable for preparing inks have the formula ##STR1## where m is 1 or 2, n is 0 or 1, Z1 is hydrogen or substituted or unsubstituted C1 -C4 -alkyl, Z2 is hydrogen, substituted or unsubstituted C... | 12/29/1992 |
| 5126435 | Process for the preparation of metallisable azo dyes A process for the preparation of azo dyes of formula ##STR1## wherein K is the radical of a coupling component of the benzene or naphthalene series or of the heterocyclic series, and the hydroxy group is attached to K adjacent to the azo group, X is ... | 06/30/1992 |
| 5086168 | Monoazo pigments derived from diazotized di- or trichloroanilines, preparation thereof and their use The invention relates to monoazo pigments prepared from dichloroanilines as diazo components and CH-acidic coupling components of the acetoacetarylamide or naphthol series, these pigments only containing an extremely low level of polychlorinated biphenyls... | 02/04/1992 |
| 5075428 | 2,4-diamino-6-fluorotriazine disazo reactive dyestuffs A dyestuff of the formula ##STR1## in which R is H or Ch3 ##STR2## in which R1 is H, substituted or unsubstituted C1 -C4 -alkyl or --X--Y X is a divalent aliphatic, cycloaliphatic, aliphaticcycloalip... | 12/24/1991 |
| 5069719 | Organic solvent based ink composition Disclosed is an organic solvent based ink composition which contains a specific dye and an organic solvent, especially an alcohol or a glycol and which has excellent stability with time and good writing properties. The organic solvent based ink compositio... | 12/03/1991 |
| 5037963 | Process for the preparation of symmetrical azo-dinitrile, dicarboxylic acids from keto acids The preparation of symmetrical azodinitriles prepared from keto acids is disclosed. A keto acid of the formula ##STR1## is reacted with M(CN)x and an ammonia source to obtain an aminonitrile metal carboxylate of the formula ##STR2## ... | 08/06/1991 |
| 5026830 | Process for the preparation of azo dyes by carrying out coupling in the presence of an alkali metal chloride and ammonium chloride Process for the preparation of azo dyes of the formula ##STR1## in which K is the radical of a coupling component of the benzene or naphthalene series or of the heterocyclic series in which the hydroxyl group is attached to K in a position adjacent t... | 06/25/1991 |
| 5013826 | Azo dyes containing 5-cyclohexylcarbonyl-thiophene diazo components and 1,2,3,4-tetrahydroquinoline coupling components The azo dyes of the formula ##STR1## in which R1 is hydrogen or substituted or unsubstituted C1 -C10 alkyl, R2 is a group of the formula, --CN, --CON(R8)R9, --COR10, --COOR | 05/07/1991 |
| 5011917 | Process for preparing a stabilized composition of a lithium azo compound A process for the preparation of a pH-stabilized, liquid, aqueous dyestuff composition of the lithium azo dyestuff of formula (1) ##STR1## which composition has an Na-content of less than 0.2% b.w., based on the lithium azo compound of formula (1), i... | 04/30/1991 |
| 5010179 | Process for the preparation of mixed, symmetrical azonitrile dicarboxylic dicyano acids and initiators The preparation of mixed, symmetrical azonitrile initiators prepared from keto acids and aminonitrile is disclosed. A keto acid of the formula ##STR1## is reacted with M(CN)x and an ammonia source to obtain an aminonitrile metal carboxylat... | 04/23/1991 |
| 5010178 | Process for the preparation of mixed azonitrile carboxylic acid initiators Disclosed are processes for the preparation of mixed azodinitriles initiators of the formulae ##STR1## These initiators are prepared by reacting a keto acid of the formula ##STR2## with M(CN)x, a hydrazine source, a ketone of the form... | 04/23/1991 |
| 5010177 | Process for the preparation of an azonitrile dicarboxylic acid initiator in acetone having a low salt and low water content Disclosed are processes for the preparation of an azonitrile initiator having both a low salt and low water content of the formula ##STR1## This initiator is prepared by reacting a keto acid of the formula ##STR2## with M(CN)x, a hydr... | 04/23/1991 |
| 5008379 | Chromium complexes of sulfo group containing disazo compounds having a resorcinol biscoupling component radical Water-soluble, anionic, chromium complexes of disazo compounds, at least one of the complex-forming disazo compounds being of the formula, ##STR1## in which ##STR2## is the radical of a carboxy group-containing diazo component of the benze... | 04/16/1991 |
| 5003053 | Water-soluble monoazo compounds containing a p-aminophenylamino- and chloro- or fluoro-substituted triazinylamino group and a fiber-reactive group selected from the vinylsulfone series, suitable as dyestuffs Water-soluble monoazo compounds of the general formula (1) which dye in fast, mainly red shades materials which contain carboxamide and/or hydroxy groups, preferably in the form of fibers, in particular cellulose fiber materials. ##STR1## in whi... | 03/26/1991 |
| 4996302 | Process for the preparation of polyazo dyes A process for the preparation of polyazo dyes is described which comprises (a) diazotizing a compound of the formula ##STR1## and coupling the product onto a compound of the formula ##STR2## (b) diazotizing a compound of the formula ##STR3## ... | 02/26/1991 |
| 4994561 | Process for the preparation of metallizable azo dyes carrying out coupling in an inert gas atmosphere in the presence of an ammonium salt A process for the preparation of an azo dye of formula ##STR1## wherein K is the ଲ-naphthol radical, X is hydrogen or nitro and M is an alkali metal ion or an ammonium ion, which process comprises coupling an aqueous solution containing 15 to 3... | 02/19/1991 |
| 4994111 | Ink-jet ink containing lithium salt of copper complex monoazo dye The dye of the formula: ##STR1## which is suitable for use in aqueous inks, especially for ink jet printing.... | 02/19/1991 |
| 4994563 | Monoazo dyes containing a 3-sulfoalkanoylamino or 3-sulfoalkylsulfonylaminoaniline coupling component The azo dyes of the formula ##STR1## in which D is a diazo component, R1 and R2 independently of one another are each a C1 -C10 alkyl, C5 -C7 cycloalkyl, phenyl or naphthyl radical eac... | 02/19/1991 |
| 4978746 | Reactive naphthyl aza pyridone dyestuffs A dyestuff of the formula ##STR1## wherein A=H, unsubstituted C1 -C4, C1 -C4 -alkyl substituted by OH, SO3 H or COOH or phenyl or COOR', R'=H or C1 -C4 -alkyl, X=--CH.dbd.CH... | 12/18/1990 |
| 4975540 | Water-soluble disazo dyestuffs containing a vinylsulfonyl or b-sulfatoethylsulfonyl-substituted nitrophenylamino group, suitable as dyestuffs Disazo compounds conforming to the general formula (1) below and suitable for use as fiber-reactive dyes for the dyeing of carboxamido-containing and/or hydroxy-containing materials such as wool and, in particular, cellulose fiber materials, in navy hues ... | 12/04/1990 |
| 4973671 | Doubled copper formazan reactive dyes containing a monofluorotriazine or monochlorotriazine group Double copper formazan reactive dyes of the formula ##STR1## in which R1 is hydrogen, hydroxylsulfonyl or chlorine; R2 is hydrogen or hydroxylsulfonyl; one of two radicals R3 and R4 is hydrogen and the othe... | 11/27/1990 |
| 4955987 | Process for the preparation of concentrated aqueous, substantially salt-free solutions of aminotriazinyl reactive dyes, aqueous dye solutions produced thereby and process of dyeing The invention describes a process for the preparation of concentrated aqueous, substantially salt-free solutions of aminotriazinyl reactive dyes, which process comprises starting from a dye which contains sulfo groups and one or more radicals capable of r... | 09/11/1990 |
| 4939242 | Process for the preparation of the lithium salt of a fiber-reactive azo dyestuff A process for the preparation of the lithium azo compound of the formula ##STR1## having an Na content of less than 0.2% by weight, in particular less than 0.1% by weight, in which the lithium salt of 4-(ଲ-sulfatoethylsulfonyl)-aniline is diazo... | 07/03/1990 |
| 4933436 | Process for the preparation of stable aqueous solutions of anionic dyestuffs by conducting diazotization in the presence of an aromatic sulphonic acid Azo dyes are obtained by diazotizing an aromatic amine and combining the resulting diazonium salt solution with a sulpho-containing coupling component when the sole acid donor used for the diazotization reaction--instead of the otherwise customary mineral... | 06/12/1990 |
| 4931550 | Lithium salt of copper complex monoazo dye The dye of the formula: ##STR1## which is suitable for use in aqueous inks, especially for ink jet printing.... | 06/05/1990 |
| 4920205 | Process for making azo pigments Azo pigments are made by subjecting a diazo component to an azo coupling reaction with the equivalent quantity of a coupling component difficultly soluble at less than 65° C. in the aqueous/acid and aqueous/netural pH-ranges. More specifically, an aqueou... | 04/24/1990 |
| 4920206 | Process for making azo pigments Azo Pigments are made by subjecting a diazo component to an azo coupling reaction with the equivalent quantity of a coupling component difficultly soluble at less than 65° C. in the aqueous/acid and aqueous/neutral pH-ranges. More specifically, an aqueou... | 04/24/1990 |
| 4917731 | Water-soluble black trisazo dyestuffs Water-soluble black trisazo dyestuffs of the general formula I ##STR1## wherein R denotes hydrogen, alkyl having 1 or 2 carbon atoms, alkoxy having 1 or 2 carbon atoms, acylamino having 2 or 3 carbon atoms or carboxamide and n denotes a number from 0... | 04/17/1990 |
| 4910298 | Monoazo compound having triazinyl bridging group and two vinylsulfone type fiber reactive groups imparting yellowish color A monoazo compound of the following formula, ##STR1## wherein D is sulfonaphthyl, sulfophenyl or carboxyphenyl, any one of A1 and A2 is sulfo and the other is hydrogen, methoxy or ethoxy, R1 and R2 are inde... | 03/20/1990 |
| 4906739 | Fibre-reactive azo dyes containing a monofluororotriazine group A fibre-reactive azo dyestuff of the formula ##STR1## in which X is alkyl or alkoxy with 1 to 4 carbon atoms, carboxyl or halogen, n is 1, 2 or 3, m is 0 or 1, p is 0 or 1 and q is 0 or 1 and the benzene or naphthalene rings A, B and B' can contain f... | 03/06/1990 |
| 4894447 | Surflonated azo dyes containing a diazo component consisting of a two ring heterocycle with an aminophenylene group Azo dyes of the formula ##STR1## or tautomeric forms thereof, in which: Z is N or CH, X is O, NR1 or N, W is N or C, K is a coupling component, R is hydrogen, C1 -C6 -alkyl, C1 -C4 -alkoxy, halogen, n... | 01/16/1990 |
