76results about "Nitro/nitroso dyes" patented technology

Primary intermediates for hair coloring compositions for oxidative dyeing of hair are compounds of the formula (1): wherein R is selected from C1 to C5 alkyl or hydroxyalkyl, a C3 to C6 cyclic ring containing hetero atoms selected from O, S and N atoms, and -CH2-Ar where Ar is an aromatic ring wherein the aromatic ring may be substituted with one or two hydroxy C1 to C3 alkoxy, or amino groups.

The present invention is concerned with a dye system for application to a substrate, the dye system comprising: (a) at least one dye precursor; (b) an oxidising agent; and (c) a catalyst, wherein the catalyst is a homogeneous catalyst or a heterogeneous catalyst. Preferably, the catalyst comprises at least one metal-containing compound. The invention also envisages a method for the coloration of a substrate, the method comprising treating the substrate with the dye system of the invention. In preferred embodiments of the invention, the substrate comprises human hair, natural or synthetic polymers, or textile fibres. In further preferred embodiments, the at least one dye precursor is an organic precursor, the at least one metal derivative for use as a catalyst comprises at least one inorganic metal compound or at least one metal complex comprising at least one organic ligand, and the oxidising agent is hydrogen peroxide.

A color filter has a filter segment. The filter segment is formed by means of a color composition for color filter. The color composition for color filter includes: a phosphate-ester series pigment dispersant; a pigment derivatives having a certain alkali-base; at least one alkali-base-containing derivatives selected from pigment derivatives, a Anthraquinone derivatives and a triazine derivatives; a pigment carrier; and a pigment.

A method for synthesizing dyes excitable by a helium-neon laser (excitable at 633 nm) from hololepidines, e.g., 7-halolepidine, which dyes are suitable for detection and enumeration of reticulocytes in human blood samples. In another aspect, the invention provides a method for immunotyping phenocytes. The method is based on the phenomenon that when dyes of certain structure intercalate into DNA or RNA, the intensity of the dye increases. Dyes suitable for this invention can be described as having (a) a first heterocyclic moiety, (b) a second heterocyclic moiety, and (c) a linking group that connects the first and second heterocyclic moieties. Both the first and second heterocyclic moieties must contain at least two rings, preferably fused together. The dye is characterized by conjugation, whereby the first moiety is ethylenically conjugated to the second moiety.

An object of the present invention is to provide a method for accurately evaluating the specific incorporation of D-glucose into cells. The present invention as a means for achieving the object is characterized by comprising contacting a D-glucose derivative that has a fluorescent chromophore in the molecule and is specifically incorporated into cells and an L-glucose derivative that has a fluorescent chromophore in the molecule with different cells in the same cell strain to be evaluated, respectively, comparing the fluorescence emitted by the D-glucose derivative that has a fluorescent chromophore in the molecule and is specifically incorporated into cells with the fluorescence emitted by the L-glucose derivative that has a fluorescent chromophore in the molecule, and evaluating the specific incorporation of D-glucose into cells relative to L-glucose by taking the difference between the two kinds of fluorescence intensities.

The object of the invention are (p-aminohydroxyphenyl)acrylamide derivatives of general formula (I) or the physiologically tolerated, water-soluble salts thereof

and oxidative coloring agents for keratin fibers, containing these compounds.

The present invention relates to a preparation process of sulfide dyes and its product. It particular, it relates to a preparation process of sulfur black dyes by adopting spray-drying process and its prepared sulfur black product. Said sulfur black product is characterized by that its grain diameter is 150-200 micrometers, specific surface area is 300-360 sq.cm/g, it has the good wettability, flowability and dissolvability.

The present invention concerns a composition for the dyeing keratin fibers especially human hair on the basis of an oxidation dyestuff precursor system reacting with peroxide and comprising additionally anionic direct dyes which provides long-lasting, intensive, vibrant colors. Hair dyeing composition of the present invention comprises at least one oxidation dyestuff precursor reacting with peroxide, optionally at least one coupling agent and at least one acidic direct dye. The compositions of the present invention do not comprise any cationic dyes.

A method for the synthesis of 5-aryl-1,3,3,-trimethyl-2-methylene-indoline derivatives of Formula (I) or its salts of Formula (Ia)

wherein 1 mole of a 5-aryl-2,3,3-trimethyl-3H-indole derivative of Formula (VII) is reacted for 1 to 44 hours at a temperature of 20° to 180° C. in an apolar, aprotic or polar, protic or polar aprotic solvent with 1 to 50 moles of a compound of Formula R1-A; new compounds of Formulas (I)/(Ia) and (V), obtainable by this method

as well as an agent containing at least one compound of Formula (I)/(Ia) and a carbonyl/imine compound for dyeing keratinic fibers and a method for temporarily dyeing keratin fibers, for which the keratin fiber is dyed with the aforementioned agent and the dyeing, so obtained, is removed again at any later time by a sulfite preparation.

The invention discloses a preparation method of C.I. pigment yellow 74. The preparation method comprises the following steps of 1, preparation of a diazonium salt solution; 2, preparation of a coupling solution; 3, a coupling reaction; 4, preparation of an auxiliary agent suspension; 5, post-treatment of the pigment. The method has the advantages that the hue and particle uniformity problems of the post-treatment of the pigment are effectively solved, due to the addition of pigment derivatives, the prepared product is higher in color fastness to light and better in fluidity, the hiding power and the coloring intensity are simultaneously improved, the environmental pollution is extremely small in the aspect of sewage discharge, the prepared pigment can be widely used for aqueous systems ofdry paint and external wall coating, and a vacancy that the hiding power is high but the coloring power is low is filled.

Colorant for Keratin Fibers Containing Cationic Indazoline Thiazolazo Dyes of the General formula (I).

The invention discloses a chromic blue azo dye as well as a preparation method and application thereof. The structural formula is as shown in formula (I). The chromic blue azo dye in the invention is applied to polyester fiber dyeing or printing. The chromic blue azo dye is selected from at least one compound of structural general formula (I) to prepare and obtain a disperse dye composition, and the disperse dye composition can be applied to polyester fiber dyeing or printing. During dyeing, the washing fastness, rubbing fastness, perspiration fastness, light fastness and degree of dyeing are excellent, and the disperse dye composition in the invention is high in strength, bright in color and good in dyeing property, particularly has excellent washing fastness, is stable in color and luster, is unlikely to fade and is relatively low in cost.