36 results about "Bisazomethine dye" patented technology

Black disazo dyes of general formula (V)

wherein

A is a moiety of formula (VI)

or of formula (VII)

and

B 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 (k_vis) 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.

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 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.

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.

An inkjet ink includes: (i) a disazo dye of formula (I):

(ii) 1,3-propanediol; (iii) a glycol compound selected from the group consisting of: triethylene glycol and tetraethylene glycol; and (iv) water. The ink has low toxicity and is preferably absent ethylene glycol and sulfolane.