37 results about "Bisazomethine dye" patented technology

The present invention relates to a kind of disazo dyestuffs composition, the described composite active blank dyestuff mainly contains four dyestuffs, said invention also provides their structure formulas. The described composite dyestuff is suitable for dyeing dark colour fabrics, such as cellulose fibre, cotton fibre and synthetic fibre, etc., and has good level-dyeing property, repeatability, high dyeing fastness, fastness to washing and wet rubbing fastness.

Black disazo dyes of general formula (V)whereinA is a moiety of formula (VI)or of formula (VII)andB is a moiety of formula (VIII)or of formula (IX)and wherein M, R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, R15, R16, R17, R18, R19, R20, R21, R22, R23 and R24 are as defined in the specification, are excellent black dyes for dying and printing cellulose containing materials and textile materials and, in particular, for the preparation of recording liquids for ink jet printing and for writing utensils.

The invention discloses a high-conductivity graphene and a graphene conducting film, and a preparation method thereof, belonging to the field of materials. The method comprises the following steps: carrying out blending and mechanical grinding on preoxidized graphite powder prepared by a concentrated acid oxidization process and disazo dyes to prepare the high-conductivity graphene; and dispersing the high-conductivity graphene in a solvent, forming a graphene film on a substrate surface by a film-forming process, and forming the graphene conducting film from the graphene film by a surface treatment process. The preparation method has the advantages of simpleness, mild preparation conditions, controllable technological parameters, high yield and low production cost. The high-conductivity graphene has the advantages of high solvent dispersivity, high stripping efficiency, favorable film-forming property and favorable conductivity; and the graphene conducting film has the advantages of low resistance, wide substrate applicability, favorable mechanical properties and high biocompatibility, and has wide application prospects in the fields of lithium ion batteries, solar cells, super capacitors, electromagnetic shielding, antistatic, biosensing, low-cost light-permeable electrodes and the like.

The invention provides an inkjet black ink ensuring excellent image durability capable of satisfactorily maintaining the image quality such as non-loosening of black and gradation even when the image is stored for a long period of time, which is a inkjet black ink having a discoloration rate constant (kvis) of 5.0×10−2 [hour−1] or less, which is measured by using an ozone gas, the ink comprising an aqueous medium having dissolved or dispersed therein at least one dye selected from (1) an azo dye having a specific structure where a heterocyclic group is bonded to both of two N atoms, (2) a phthalocyanine dye having a specific structure, (3) an azo dye having a specific structure where a 5-membered heterocyclic group is bonded to one of two N atoms and a 6-membered 2-amino heterocyclic group is bonded to the other, and (4) a bisazo dye constituted by a specific aromatic or heterocyclic group and an azo group.

The invention provides a water-soluble ink capable of forming an image having good color hue and high fastness in various use and environmental conditions, which comprises a coloring composition comprising a disazo dye represented by the following formula 1: A1-N═N-A2-N═N-A3 and at least one other dye having a specific structure; in formula 1, A1, A2 and A3 each independently represents an aromatic group which may be substituted or a heterocyclic group which may be substituted, and A1 and A3 each is a monovalent group and A2 is a divalent group.

Disazo dyes of general formula (V)wherein X, R1, M and n are as defined in the specification, are excellent yellow dyes for dying and printing of cellulose containing materials and textile materials, and, especially, for the preparation of inks for ink jet printing.

This invention relates to a brown reactiveness Bisazo Pigments, and its structure general formula is I, with R1,R2,R3 being hydrogen, C1-4 alkoxyl, C1-4 alkyl radical, acetamido, uramino and R4 being -CH=CH2 or -CH2CH2W(W is a radical which can be reduced by alkali), m equaling to 2,3 and n equaling to 0,1, and z being benzene or naphtalin with or without sustituent. Its preparation is that N-2-(2-ethylene sulfone sulphate) Ethylamidobenzene and halogeno-triazine are conducted ehydrohalogenation condensation reaction with molecular ratio 1:1-1.1, and then the halogeno-triazine which has been substituted and Bisazo Pigments color radical with amino are conducted condensation reaction, brown reactiveness Bisazo Pigments is produced at last.

An inkjet ink includes: (i) a disazo dye of formula (I):(ii) sulfolane; (iii) a glycol compound selected from the group consisting of: ethylene glycol, diethylene glycol, triethylene glycol, tetraethylene glycol and pentaethylene glycol; and (iv) water.

A dye composition, which comprising: a monoazo dye of the formula and a disazo dye of the formula (II) wherein R, R1, R2, R3, R4, Y, K, D are defined in this document ; these kinds of dye composition have good stability and build-up. The dye composition are suitable for dyeing and printing of materials containing cellulose fibers, such as cotton, artificial cotton, linen, and artificial linen, or synthetic polyamide, such as wool, silk, and nylon etc.

The invention provides a composite reactive black dye which is prepared by compounding dyes shown as a formula (1), a formula (2), a formula (3) and a formula (4). The composite reactive black dye disclosed by the invention is prepared by compounding two disazo dyes and monoazo-dyes, has high black degree, high reactivity, high increase rate and high solubility as well as good fixation ability andexcellent application performance, is applicable to continuous padding and cold pad-batch processes, and can effectively solve problems such as head-tail shading and side-to-centre shading during continuous padding.

A dye composition, which comprising (A) at least one disazo dye selected from the formula (I) or (II), wherein R, R1, R2, D1 and D2 are defined the same as the specification; and (B) a diazo dye of the formula (III), wherein (R9)0-2, (R10)0-2, Q1 and Q2 are defined the same as the specification. These kinds of dye composition with high fixation and good build-up. They are distinguished also by high washing off and a low nylon stain and they are suitable for dyeing and printing of materials containing either cellulose fibers, such as cotton, artificial cotton, linen, and artificial linen, or polyamide fibers, such as wool, silk, and nylon etc. Dyed materials with excellent properties can be obtained, showing especially outstanding performance in of washing off, levelness, build-up, wet fastness and light fastness.

The invention provides a triphenylmethane weak acid red bisazo dye. The triphenylmethane weak acid red bisazo dye has the advantages of good reproducibility, short dyeing time, no damage to fabrics and the like during dyeing; the solubility is high, the coloring rate is high, and the wet treatment fastness and the light fastness are high. The weak acid red bisazo dye is safe, low in toxicity, simple in preparation process, low in cost, less in three wastes and easy for industrial large-scale preparation, is an environment-friendly dye, and is an upgrading and updating product of common acid dyes.

The invention relates to an environment-friendly reactive red disazo dye and a preparation method thereof. The chemical structure general formula is disclosed as Formula (I), wherein X is selected from Na, K or Li; R1 is -H, -CH3(CH2)n-1, -CH3(CH2)n-1O, -COOH or -SO3H; R2 is -CH3(CH2)n-1O; R3 is -(CH2)n-; and n is a whole number, and 1<=n<=4. The disazo dye contains hydroxy, amino and sulfo groups, and thus, is weakly alkaline, thereby being beneficial to lowering the strict preparation conditions and further beneficial to the subsequent dyeing technique. The functional groups are combined with the disazo group to enhance the fixation rate and deep dyeing property.

The present invention provides a pigment dispersant that can improve the dispersion of an azo pigment in a water-insoluble solvent.The present invention relates to a compound having a bisazo moiety and a polyester moiety.

The invention provides a triphenylmethane weak acid red disazo dye, which has the advantages of good reproducibility, short dyeing time, no damage to fabrics, etc. during dyeing; high solubility, high coloring rate, wet treatment fastness and Light fastness is strong. The weak acid red disazo dye of the invention is safe, low in toxicity, simple in preparation process, low in cost, less in three wastes, easy in industrialized large-scale preparation, is an environment-friendly dye, and is an upgraded product of common acid dyes.

The invention relates to a preparation method for water soluble carbon nanotube, which is based on non-covalence surface finishing to the carbon nanotube by disazo dye molecule, a high water-solubility and effective detachment is realized for the carbon nano tubes. The method comprises using azo-dyes, carbon nano tube and water as raw material, purifying the commercial carbon nano tube and washing into neutral, drying and mixing the obtained purified carbon nano tube with excess azo-dyes, fully dissolving or dispersing the carbon nano tube through the conventional physical abrasion or supersonic dispersion.

The preparation method of a high-concentration low-temperature stable liquid colorant disclosed by the present invention comprises the following steps: (1) selecting a suitable dye and its dye synthesis process, producing and preparing the required monoazo or disazo Colorant coupling solution for dyes, heat up the colorant coupling solution to 55°C-70°C, add hydrochloric acid solution, adjust the pH of the colorant coupling solution to ≤5.0, stir evenly, add liquid alkali to adjust the pH to 6.0-7.0 to obtain high-concentration dyeing (2) Stir the high-concentration coloring dye solution prepared in step (1) at room temperature to 60°C to form a uniform high-concentration coloring solution, then add alcohol compounds to aid in dissolution, and then add lignosulfonic acid dispersants to stabilize high Concentration coloring solution to obtain high concentration low temperature stable liquid colorant. The invention ensures the stability of the dye solution without precipitation when the high-concentration liquid colorant product is at a temperature above -7°C by adjusting the process and adding different types and proportions of co-solvents and dispersants.

The invention relates to a preparation method of a high-sensitivity fullerene photoelectric chemical probe. The method is based on non-covalent modification of bisazo dye molecules on a fullerene photoelectric composite material and covalent fixation of biomolecules on the surface of the material, so that a water-soluble photoelectric chemical probe is prepared. A common electrochemical analyser and a low-cost laser pointer monochromatic source are adopted, the fullerene photoelectric chemical probe is taken as a marking probe of a detection antibody in a sandwich immune structure, high-sensitivity detection that tumor marker CEA (carcino embryonie antigen) is reduced to 0.1 pg / mL can be realized, the sensitivity of the probe can be compared with that of a common electrochemiluminescence method in the current clinic, a detection device can be integrated easily and is portable and low in cost, and the probe has an application prospect in clinical high-sensitivity biochemical analysis.

A compound having a bisazo moiety and a polyester moiety is provided. The compound can be provided as a pigment dispersant to improve the dispersion of an azo pigment in a water-insoluble solvent.

The present invention relates to dyes of the formula (I), in which R1 to R4, D1, f, and M are defined as indicated in claim 1, to processes for preparing them, and to their use for dyeing and printing hydroxyl- and / or carboxamido-containing materials.

The invention relates to a preparation method of a dark brown reactive bisazo dye. In a structural formula of the dye, R1 is CH3, OCH3 or H; R2 is OCH3; R3 is -COCH3 or -CONH2; and R4 is H, -SO3H or -COOH3. The preparation method of the dye comprises the following steps: carrying out diazotization between 2,5bismethoxyl4(beta-hydroxyethylsulfatoethylsulfonyl)aniline and nitrous acid at 0-10 DEG C, coupling with semicarbazide, mixing with sodium nitrite at pH of 7.5-8, adding the mixture into hydrochloric acid and ice water to carry out diazotization, coupling with a gamma acid derivative, carrying out salting-out, filtering and drying. The prepared dark brown reactive bisazo dye has excellent properties of high lifting force, good leveldyeing property, good dyeing repeatability, high degree of dyeing and the like.

The invention discloses a high-conductivity graphene and a graphene conducting film, and a preparation method thereof, belonging to the field of materials. The method comprises the following steps: carrying out blending and mechanical grinding on preoxidized graphite powder prepared by a concentrated acid oxidization process and disazo dyes to prepare the high-conductivity graphene; and dispersing the high-conductivity graphene in a solvent, forming a graphene film on a substrate surface by a film-forming process, and forming the graphene conducting film from the graphene film by a surface treatment process. The preparation method has the advantages of simpleness, mild preparation conditions, controllable technological parameters, high yield and low production cost. The high-conductivity graphene has the advantages of high solvent dispersivity, high stripping efficiency, favorable film-forming property and favorable conductivity; and the graphene conducting film has the advantages of low resistance, wide substrate applicability, favorable mechanical properties and high biocompatibility, and has wide application prospects in the fields of lithium ion batteries, solar cells, super capacitors, electromagnetic shielding, antistatic, biosensing, low-cost light-permeable electrodes and the like.