37 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.

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) 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.