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7619075 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...
7232896 Colorant for ocular lenses and material for colored ocular lenses using the colorant  
A colorant for ocular lenses represented by the formula (I) defined herein or a colorant for ocular lenses represented by the formula (II) defined herein.
7173114 Lightfast colorant and lightfast ink composition including the same  
A lightfast colorant and a lightfast ink composition including the lightfast colorant utilize a lightfast colorant that is derived by covalently binding a cinnamate derivative and a conventional...
7125443 Lightfast colorant and lightfast ink composition including the same  
A lightfast colorant and a lightfast ink composition include a lightfast colorant that is derived by covalently binding a benzophenone derivative and a conventional colorant and that imparts...
6709642 Calixarene acetamido derivatives, preparation and use thereof for extracting strontium  
The invention concerns derivatives of calixarene having the formula: in which: R 1 represents various hydrocarbon groups, R 2 and R 3 represent an alkyl, cycloalkyl or aryl group or a group...
6699976 Polyazo compound or salt thereof and dye-based polarization film containing the same  
A polyazo compound or salt thereof covering the region of from 500 to 580 nm and manifesting high initial polarization ability and represented by the following formulae (I) or (II): wherein, A...
6451989 Black azo dyes  
Provided are novel black azo dyes which are useful in ink compositions, especially ink jet ink compositions. The dyes and ink compositions of the present invention exhibit a good balance of optical...
6417178 Amyloid binding nitrogen-linked compounds for the antemortem diagnosis of alzheimer's disease, in vivo imaging and prevention of amyloid deposits  
Amyloid binding compounds which are derivatives of Chrysamine G, pharmaceutical compositions containing, and methods using such compounds to identify Alzheimer's brain in vivo and to diagnose other...
6395885 Use of lithium salts of anionic dyes to enhance their light-fastness  
The use of lithium as a cation for an anionic dye to enhance the light-fastness of the dye. Also claimed are the lithium salts of certain anionic dyes as defined in the description; mixed...
6376655 Physically functional materials  
The invention relates to novel monodisperse or polydisperse compounds, in general named DNO (diamino acid Nα-substituted oligopeptides), preferably low molecular weight polypeptides, e.g., based...
6346609 Cationic azo-dyes  
Cationic azo dyes of the general formula I where R 1 , R 2 , R 3 , A 1 , A 2 , B 1 , B 2 , An ⊖ , n and K have the meaning given in the specification are prepared and used for the dyeing and...
6277966 Azo-compounds and dye polarizing films containing them  
An azo-compound, free acid form of which is represented by the following formula (I): ##STR1## wherein A and B represent, independently with each other, a phenyl having one or two groups selected...
6143062 Water-soluble disazo compounds, aqueous ink compositions, and colored articles  
Are disclosed disazo compounds represented by the general formula (1): ##STR1## wherein A represents a phenylene or naphthylene group which may be optionally substituted; each of R 1 and R 2 ...
6140477 Near-infrared ray absorbing polyazo compound  
A polyazo compound capable of effectively absorbing near-infrared rays, which can be produced from readily available raw materials is provided, which comprises at least one --OH group or at least...
6084078 Disazo dyestuffs for dyeing cellulosic materials  
The novel disazo dyestuffs of the formula (I) in which the substituents and indices have the meanings given in the description, are outstandingly suitable for dyeing cellulosic materials in...
6008330 Process for the preparation of aminodiarylazo compounds  
The present invention relates to a novel process for the preparation of aminodiarylazo compounds by reducing nitrodiarylazo compounds using 1,2-alkanediols or 1,2-aminoalkanols.
5969115 Bisazo dyes and their preparation and use  
Bisazo dyes of formula (IX) ##STR1## and of formula (X) ##STR2## wherein A, R 4 , M and n are as defined in the specification, are excellent dyes for dyeing and printing of cellulose containing...
5883235 Calix 4!arene compounds for detection of calcium  
Calix 4!arene compounds are disclosed that can be used as active components in a calcium sensitive sensor. The compounds exhibit strong calcium ion binding selectivity over sodium and potassium...
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 NHR 1 and NHR 2 are in each case in the 6- and/or 7-position and R 1 , R...
5872228 Process for the preparation of reactive azo dyes  
Reactive dyestuffs of the formula (I) ##STR1## wherein A denotes the radical of a diazo component and X is a fibre-reactive heterocyclic radical are obtained by hydrolysis of maleylated azo...
5795971 Aminomethylnaphthalenecarboxlic acid dyestuffs  
The novel aminomethylnaphthalenecarboxylic acid dyestuffs of the formula (I) ##STR1## in which the substituents and indices have the meaning given in the description, are outstandingly suitable for...
5782934 Process of dyeing with disazo dyes containing a fluorosulphonyl group and use thereof  
A process for colouring a synthetic textile material or fiber blend thereof which comprises applying to the synthetic textile material a compound of Formula (1): A--NN--D--NN--E ...
5756693 Disazo Compound  
A compound of the Formula (1) and salts thereof: ##STR1## wherein: A is optionally substituted phenyl or optionally substituted naphthyl; R 1 is NR 4 R 5 ; R 2 is H, halo, --COOH, --SO 2 ...
5750661 Basic dyes based on amides of J-acid (1-hydroxy-6-aminonaphthalene-3-sulfonic acid) and amides of J-acid  
Dyes of the formula ##STR1## where the ring A may be benzofused and R 1 -R 6 have the meaning defined in the specification, with the proviso that at least one quaternizable or quaternary group is...
5744591 Red dyestuffs  
A dyestuff of the general formula (1), ##STR1## wherein R 1 is H or C 1 -C 4 alkyl; R 2 is a phenyl or naphthyl group, which is unsubstituted or substituted by --Cl, --Br, --I, --CH 3 , --C 2 ...
5705620 Sensors for detecting calcium with calix 4! arene compounds  
A calix 4!arene compound, application of the compound as an active component in a calcium sensitive sensor, and a calcium sensitive sensor containing the compound. The sensor is not very sensitive...
5698682 Azo compounds and polarizing films using the compounds  
The present invention provides a polarizing film having high heat resistance and a high degree of polarization and excellent optical properties by dyeing a polymer film with a novel azo compound...
5696243 Diphenylamine compounds, polymers prepared therefrom and non-linear optics devices containing the same  
Diphenylamines of the formula ##STR1## where the ring A can be benzo-fused, and D is aryl or a five-membered aromatic heterocyclyl which contains one to three hetero atoms selected from the...
5691459 Disazo dyes containing two carbonylamino groups processes for their preparation and their use  
Azo dyes of the formula ##STR1## in which R 1 and R 2 independently of one another are unsubstituted or hydroxy-, C 1 -C4-alkoxy- or halogen-substituted C 1 -C 4 -alkyl or C 1 -C 4 -alkoxy; ...
5684139 Direct disazo dyestuffs  
Dyestuffs of the formula (I) ##STR1## wherein R 1 and R 4 independently of one another represent an acyl radical, R 2 and R 3 independently of one another represent hydrogen or unsubstituted...
5650497 Azo dyes, processes for their preparation and their use  
Azo dyes of the formula ##STR1## in which R 1 , R 2 , R 3 , R 4 and R 5 independently of one another are hydrogen, C 1 -C 4 alkyl, C 1 -C 4 alkoxy or halogen, R 6 is hydrogen or C 1 -C 4...
5580965 Disazo dyestuffs  
Disazo dyestuffs have been found which, in the form of the free acid, correspond to the formula (I) ##STR1## represents H or an optionally substituted aliphatic or aromatic radical and R 1 to R 6 ...
5554738 Acyl-aryl disazo having a 6-ureido-1-hydroxy-naphthalene-3-sulfonic acid coupling component  
Anionic disazo dyes useful for dyeing and printing textile materials, paper and leather and for the preparation of inks of the formula ##STR1## wherein D, R 3 , R 4 , M, R 5 and R 7 are defined...
5549853 Linked azo dyes  
Azo dyes of the formula W(--X--Y--Chr) n , where n is 2 to 6, y is C 1 -C 6 -alkylene, Chr is the radical of a mono- or polyazo dye, X is a radical of the formula CO--O or O--CO and...
5527889 Disazo dyes containing an alkanoylamino group and a substituted alkoxy group  
Azo dyes of formula ##STR1## wherein R 1 and R 2 are each independently of the other hydrogen, C 1 -C 4 alkyl, C 1 -C 4 alkoxy, unsubstituted C 2 -C 4 alkanoylamino or C 2 -C 4 ...
5420258 Disazo dyes containing a hydroxybenzene or alkoxybenzene middle component  
Azo dyes of formula ##STR1## wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , X, Y and n are as defined in claim 1, give dyeings of good fastness properties on nitrogen-containing or hydroxyl group...
5312906 Optical information recording media and bisazo compounds for use therein  
Bisazo compounds of formula (I), an intermediate for producing the bisazo compound of formula (I), and trisazo compounds of formula (II) for use in optical information recording media, and methods...
5298036 Mixture of disazo dyes containing sulfo-substituted 1,4-naphthalene middle components  
Azo dyes of the formula ##STR1## in which R 1 and K are as defined in claim 1, produce on nitrogen-containing or hydroxyl-containing fibre materials dyeings having good fastness properties.
5281263 Azo dyes containing a carboxy group  
According to the present invention there is provided a compound which, in the free acid form, is of the Formula (1): ##STR1## wherein A is an optionally substituted phenyl or naphthyl group; Z...
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...
5262330 Colorimetric methods and reagents for the assay of calcium in a test sample  
A chromogenic compound found to be especially selective in the determination of calcium in blood of the general formula (I): ##STR1## where: R is hydrogen or lower alkyl; X is CH 2 , CH 2 CH 2...
5262527 Disazo dyes suitable for use in ink jet printing  
Anionic azo compounds which, in the free acid form, have the Formula (1): ##STR1## Ar 1 and Ar 2 are each independently aryl or substituted aryl providing at least one of Ar 1 and Ar 2 has at...
5258505 Trisazo compounds, and dye compositions containing same  
Disclosed herein is an azo compound represented by the formula ##STR1## wherein R 1 , R 2 and R 3 each are a group or atom selected from the group consisting of a hydrogen atom, alkyl groups...
5254675 Anionic disazo dyes  
A compound which, in the free acid form, is of the Formula (1): ##STR1## wherein B is 3- or 4-carboxyphenyl; and X is H. The compound is useful in the preparation of inks for ink jet printing of...
5243033 Fiber-reactive disazo and tetrakisazo halotriazinyl dyes  
Reactive dyes of the formula ##STR1## in which R 1 , R 2 and R 3 , independently of one another, are C 1 -C 4 alkyl, C 1 -C 4 alkoxy, halogen, ureido, C 1 -C 4 acylamino, carboxyl and sulfo...
5225545 Disazo dyes containing a 1-hydroxy-3-sulfo-acylaminophenyl-amino-naphthalene coupling component  
The compounds of the formula (1) indicated in claim 1 are suitable for use as direct dyes for dyeing and printing a wide range of materials, in particular cellulose-containing fibre materials,...
5198022 Waterfast dye and aqueous ink  
A alkali-soluble dye for a waterfast ink having structural formula as follows: ##STR1## and an ink containing the dye dissolved in water. Printing from the ink is insoluble below pH 6.0; is an...
5185435 Process for the preparation of bisazo pigments in halogen-free solvents  
The present invention relates to the preparation of bisazo pigments by reaction (a) of 2 mol of an azocarbonyl chloride of the formula ##STR1## with 1 mol of a diamine of the formula ##STR2## by...
5177195 Disazo dyes  
A compound which, in the free acid form, is of the Formula (1): ##STR1## wherein B is 3,4- or 3,5-dicarboxyphenyl. The compound is useful in the preparation of inks for ink jet printing of paper,...
5175258 Processes for the preparation of bisazo photogenerating pigments using an annealing step  
A process for the preparation of photogenerating pigments which comprises the reaction of a diaminofluorenone with an alkali nitrite, an acid, and a tetrafluoroborate; thereafter reacting the...
Matches 1 - 50 out of 239 1 2 3 4 5 >