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| Number | Title | Issue Date |
| 7875706 | Disperse dyes Disperse dyes of the general formula (I) where D is a diazo component derived from a substituted or unsubstituted aromatic amine, K is an aromatic radical of the formula ... | 01/25/2011 |
| 7358345 | Disperse azo dyestuffs The present invention claims dyestuffs of formula (I), wherein D, R1 to R7 and n are defined as given in claim 1, a process for their preparation and their use ... | 04/15/2008 |
| 7358344 | Azo dye An azo dye represented by formula (I): A-N═N—B formula (I) wherein, A represents a group having a substituent required for inducing an intramolecular nucleophilic substitution reaction with a nitrogen atom of a r... | 04/15/2008 |
| 6969759 | Colorant compositions Disclosed is a colorant composition of the formula wherein R is an alkyl group, an aryl group, an arylalkyl group, or an alkylaryl group, and wherein R can be joined to the phenyl moiety to form a ring, R′ is an arom... | 11/29/2005 |
| 6479647 | Methods of making novel colorants for use within ink systems Novel addition products of hydroxyl-protecting groups (such as isocyanates) with oxyalkylene-substituted intermediates, such as poly(oxyalkylenated) aniline compounds, for the eventual production of substituted, and substantially pure, colorants, particul... | 11/12/2002 |
| 6191265 | Thermomigrationfast azo dyes Azo dyes of the formula ##STR1## wherein the substituents are each as defined in the description, are useful for dyeing and printing synthetic textile materials.... | 02/20/2001 |
| 5952328 | Benzothiazo and related heterocyclic group-containing cysteine and serine protease inhibitors The present invention is directed to novel benzothiazo and related heterocyclic group-containing inhibitors of cysteine or serine proteases. Methods for using the same are also described.... | 09/14/1999 |
| 5925150 | Black colorant composition exhibiting low flairing A black colorant composition useful for coloring polyurethanes is provided having a red benzothiazole azo colorant which, when combined with a complementary blue and yellow colorant, exhibits low flairing.... | 07/20/1999 |
| 5877301 | Benzothiazole azo dye and thermal transfer sheet employing it A benzothiazole azo dye for thermal transfer recording of the following formula (I): ##STR1## wherein R1 is a C3-8 branched chain alkyl group, R2 is a substituted or unsubstituted alkyl group, X is a hydrogen atom, a ... | 03/02/1999 |
| 5824117 | Nitrobenzisothiazole azo dyestuff The present invention relates to the dyestuff of the formula I ##STR1## modifications of this dyestuff which are stable during dyeing, processes for the preparation thereof and their use for dyeing and printing synthetic fiber materials.... | 10/20/1998 |
| 5723587 | Azo dyes Disperse dyes of formula ##STR1## wherein D is the radical of a diazo component of the benzene, naphthalene, diphenyl, azobenzene, thiophene, benzothiazole, benzisothiazole, thiazole, thiadiazole, indazole, benzotriazole, pyrazole, anthraquinone, ... | 03/03/1998 |
| 5719270 | Azophenyl compounds Azophenyl compounds of the formula: ##STR1## wherein R1 is an o-, p-directing substituent; R2 is a substituted or unsubstituted ଲ-hydroxyalkyl group; R3 is an aromatic carbocyclic or heterocyclic group which is ... | 02/17/1998 |
| 5691458 | Benzoisothiazole azo dyes There are described compounds which are represented by the formula ##STR1## The compounds are useful as dyes, and as intermediates and dye moieties in the preparation of compounds, which are particularly useful in imaging applications, such as, for e... | 11/25/1997 |
| 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 |
| 5608042 | Benzothiazolemonoazo dyes A monoazo dye of the following formula (I): ##STR1## wherein R is phenyl, phenoxy or benzyl, and D is a group of the formula (D1), (D2), (D3) or (D4): ##STR2## wherein each of X1, X2 and X3, which are independent... | 03/04/1997 |
| 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 |
| 5567470 | Heat-sensitive transfer sheet containing blue dyestuff A blue dyestuff represented by the formula (2) ##STR1## wherein each of R1, R2 and R3 is independently a hydrogen atom, halogen atom, nitro group, hydroxy group, alkyl group which may have a substituent, alkoxy group,... | 10/22/1996 |
| 5550218 | Azo compounds having unsubstituted or substituted 2-phenoxycarbonylethyl groups Compounds of the formula ##STR1## wherein A is C1-6 alkylene, D is a diazo component radical of the triazolyl, pyrazolyl, cyano(C1-4 alkyl)-imidazolyl, 4-chlorothiazolyl, 4-chlorotheinyl-2, 3-phenyl-1,2,4-thiadiazolyl-5, is... | 08/27/1996 |
| 5527888 | Thiophene-type monoazo dyes A monoazo dye of the following formula (I): ##STR1## wherein R is phenyl, phenoxy or benzyl, and D is a group of the formula (D1), (D2), (D3) or (D4): ##STR2## wherein each of X1, X2 and X3, which are independent... | 06/18/1996 |
| 5342928 | Benzisothiazole- and benzothiophene-azo dyes with a coupling component of the aniline series Azo dyes useful for dyeing or printing textile fibers or fabrics and containing novel aminobenzo heterocycles as diazo component have the formula ##STR1## where X is nitrogen or a radical of the formula CR6, where R6 is hyd... | 08/30/1994 |
| 5328994 | Azinoneutromethines New azinoneutromethines of the formula ##STR1## in which the symbols used have the meaning given in the description, a process for their preparation and their use in thermal and photochromic recording materials, as nonlinear optical materials, as pho... | 07/12/1994 |
| 5304222 | Monoazo benzothiazole disperse dye mixture A disperse dye mixture comprising from 20 to 80% by weight of a red disperse dye of the following formula (A) and from 20 to 80% by weight of a red disperse dye of the following formula (B): ##STR1## wherein R1 is --C2 H5 | 04/19/1994 |
| 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 |
| 5264032 | Pigment preparations Pigment preparation essentially comprising a) at least one pigment from the class of azo, anthrapyrimidine, anthanthrone, quinacridone, perinone, diketopyrrolopyrrole, dioxazine, flavanthrone, indanthrone, isoindolinone, isoviolanthrone, perylene, phthalo... | 11/23/1993 |
| 5187265 | Chromogenic thiol indicating benzoisothiazolone compounds The present invention relates to a chromogenic benzoisothiazolone polymer derivative for measuring the presence or appearance of thiols in an aqueous system.... | 02/16/1993 |
| 5128457 | Chromogenic thiol indicators based on an isobenzothiazolone ring system Newly synthesized chromogenic thiol-indicating benzoisthiazolone derivatives having the structure: ##STR1## where R1, R2 and R3 are as defined in the specification, are useful in the detection of thiols, particularly ... | 07/07/1992 |
| 5101021 | 4-(5',6'- and 6',7'-dihalobenzothiazol-2'-ylazo)-3-methyl-N-methyl-N-[(acetoxy or methoxycarbonyloxy)-C2-3 alkyl]anilines and mixtures thereof Compounds of the formula ##STR1## and mixtures of such compounds, wherein each R1 is independently halo, R3 is hydrogen or methyl, with the proviso that when R5 is ethoxy, R3 must be methyl, R4 i... | 03/31/1992 |
| 5075429 | Monoazo-disperse dye compounds their production and their use A monoazo compound of the formula, ##STR1## wherein D is a heterocyclic or carbocyclic compound residue such as benzothiazolyl and phenyl, X is hydrogen, alkyl, alkoxy, halogeno, acylamino or the like, Y is hydrogen, halogeno, alkyl, alkoxy and the ... | 12/24/1991 |
| 5055567 | Disperse dyes which are convertible into a thermo-migration fast form The dyes according to the invention consist of a chromophore and a radical which, on heating, forms an isocyanate or isothiocyanate group. The latter reacts with a suitable group in the environment. Dyeings of excellent thermomigration fastness are obtain... | 10/08/1991 |
| 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 |
| 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 |
| 4962040 | 2-hydrazono-4,6-dinitrobenzthiazolones useful to form dyestuffs and as color formers for detecting peroxide 2-Hydrazono-4,6-dinitrobenzthiazolones of the formula ##STR1## in which X1 represents hydrogen, C1 -C4 -alkyl, C1 -C4 -hydroxyalkyl, C1 -C4 -sulphoalkyl or C1 -C4... | 10/09/1990 |
| 4912203 | Thiophene base colorants useful for coloring thermoset resins Thiophene based colorants useful for coloring thermoset resins such as polyurethanes being the formula; ##STR1## wherein R1, R2 and R3 are selected from halogen, carboxylic acid, alkanoyl, aryloyl, carbocyclic forming... | 03/27/1990 |
| 4889535 | 4-Substituted benzothiazol-2-ylazo-N-c8-14-alkykl-N-(2'-cyanoethyl)anilines optionally having a 3-C1-4-alkyl group Compounds of the formula ##STR1## and mixtures thereof, wherien p1 R1 is hydrogen, chloro or bromo, p1 R2 is hydrogen, chloro, bromo or nitro, p1 R3 is hydrogen, chloro, bromo, nitro or --SCN, p1 R4 is hydr... | 12/26/1989 |
| 4837308 | Process for the preparation of azo compounds A universally usable process for preparing azo dyestuffs by oxidative coupling consists in carrying out the oxidation in the presence of redox mediators with a standard potential of 0.2-1.5 volts and, if appropriate, an additional oxidizing agent with a s... | 06/06/1989 |
| 4835261 | Nonionic azo compounds in which the coupling component is a 3,4-dialkoxy aniline derivative Azo compounds of the formula I ##STR1## where D=diazo component R1 and R2 =alkyl or aralkyl X=H, hydrocarbon radical or acyl are useful dyestuffs or dyestuff intermediates.... | 05/30/1989 |
| 4810783 | Process for the preparation of azo dyestuffs having an aniline-type coupler by aminolysis of the appropriate ether group-containing compounds An azo dyestuff of the formula ##STR1## wherein D=a diazo component, R1 and R2 =alkyl or aralkyl, R3 =H, R or OR1 and R4 =a hydrocarbon radical or acyl, which are prepared in a simple manner by aminolysis ... | 03/07/1989 |
| 4795712 | Calcium complexing dyes and their use in analytical compositions, elements and methods Novel chromogenic derivatives of 1,2-bis-(o-aminoaryloxy)ethane-N,N,N',N'-tetraacetic acid are useful for the determination of calcium ions in both solution and dry assays. These compounds comprise a dye moiety which is directly conjugated to the acetic ... | 01/03/1989 |
| 4775748 | Reactive colorants Novel reactive colorants being the formula: ##STR1## wherein R1, R2 and R3 are selected from halogen, carboxylic acid, alkanoyl, aryloyl, carbocyclic forming polymethylene chains, alkyl, aryl, cyano, thioalkyl, dithio... | 10/04/1988 |
| 4773915 | Benzisothiazole azo dye for synthetic fibers Azo dyestuffs of the formula ##STR1## wherein R1 denotes hydrogen, C1 -C4 -alkoxy or C1 -C4 -alkoxyethoxy and X denotes acyl, are distinguished by good levelling properties and good allround fastness ... | 09/27/1988 |
