34results about "Preparation by etherification" patented technology

The invention discloses a preparation method of a black waterborne polyurethane dye based on black chromophores in diols. The preparation method is characterized by comprising the following steps of enabling activated hydrogen in amino groups or hydroxyls contained in molecular structures of three black dyes to react with chloroethanol to obtain three black diols; then, combining the black diols with micromolecular diols, and partially or completely substituting the micromolecular diols; and next, reacting with diisocyanate, macromolecular diols and a hydrophilic chain extender to obtain the black waterborne polyurethane dye. By using the method, other micromolecular chain extenders can be partially or completely substituted with the black diols, so that solid content of an emulsion is wide in distribution range and adjustable, and the content of the black chromophores in a molecular chain of polyurethane can be controlled as required; and meanwhile, the black chromophores enter the molecular chain of the dye in a chemical bonding way, so that the characteristics of high temperature resistance, solvent resistance and migration resistance of a macromolecular dye can be sufficiently exerted, and the dye is good in durability, high in color fastness and good in safety.

There is provided a novel dichroic dye having liquid crystal properties, dichroic properties and polymerizable reactivity, the dichroic dye being used to form a color filter layer having excellent physical properties such as dichroic ratio, heat resistance, durability, high contrast ratio and polarizing properties, a composition comprising the same for color filter, a color filter array plate (an upper plate) prepared therefrom, and a liquid crystal display comprising the color filter array plate. The dichroic dye has a structure of R1-L1-M-L2-D (wherein, D is a dichroic structure, M is a structure with liquid crystal properties, R1 is a reactive end functional group, and L and L1 are linking structures that link R1, M, and D), and the composition for forming a color filter layer includes the dichroic dye. Also, the color filter array plate, which comprises color filter layer formed of the composition of this invention and the liquid crystal display, which comprise the color filter array plate but does not requires an upper alignment film and/or a polarization plate are provided. The color filter array plate and the liquid crystal display comprising the same have excellent physical properties such as durability, polarizing degree, resolution and contrast ratio.

The invention discloses a bright yellow disperse dye capable of alkaline dyeing. The bright yellow disperse dye is a compound represented by a formula A, wherein R1 is -H, -CH3, -C2H5, -OCH3 or -OC2H5, and R2 is C1-C4 straight-chain or branched-chain alkyl or benzyl. The disperse dye shows a bright yellow color, can be used individually and also can be in combination use with alkali-resisting disperse dyes having other colors. The disperse dye has excellent alkali resistance and hydrogen peroxide oxidization resistance stability; the characteristic makes the disperse dye not only can be applied in general alkaline printing and dyeing processing of a polyester fiber material, but also can be applied in a scouring dyeing-bath process or a bleaching dyeing-bath process and a dispersed active one-paste printing process, and can meet the requirements of environmental protection.

Disclosed are a dichroic dye for use in a polarization film represented by the following Chemical Formula 1, a polarization film including a polymer resin and the dichroic dye, and a display device including the polarization film.

In Chemical Formula 1, Ar, R¹ to R⁴ are the same as those defined in the detailed description.

The invention discloses a method for preparing direct yellow G. DSD acid is taken as an initial raw material, and the method comprises the following steps of: reacting with sodium nitrite, phenol and chloroethane in turn, and respectively performing diazotization, coupling and chloroethane etherification to obtain the direct yellow G, wherein a solvent in diazotization, coupling and chloroethane etherification is ethanol. The DSD acid is taken as the initial raw material and is subjected to diazotization, coupling and chloroethane etherification respectively to form a dye of the direct yellow G, the ethanol is adopted as a reaction solvent in the diazotization, coupling and chloroethane etherification and can be recycled after reaction, a large amount of water is prevented from serving as the reaction solvent, the problem that a large amount of industrial wastewater is difficult to treat is radically solved and the zero emission of the industrial wastewater is achieved.

The present invention addresses the problem of providing with a simple production process and with high efficiency a new photosensitive azobenzene derivative which is capable of freely controlling phase transition by photostimulation, and the problem is solved by using an azobenzene derivative represented by general formula (1). (1) (In the formula, R₁ and R₆ are independently an alkoxyl group having 6-18 carbon atoms, R₂-R₅ and R₇-R₁₀ are independently a hydrogen atom or an alkyl group having 1-4 carbon atoms which may have branches, provided that not all of R₂-R₅ and R₇-R₁₀ are hydrogen.)

The invention aims at providing a chrysophenine G production process with high yield and low pollution in order to mainly overcome defects in the existing chrysophenine G production technology, and provides a favorable solution for solving problems of high cost, high energy consumption and high pollution caused in the chrysophenine G production process. Chrysophenine G is a direct dye, is orange powder seen from the appearance and belongs to the technical field of organic dyes. The production process comprises the steps of diazotizing DSD acid, and then, coupling the diazotized DSD acid and dimolecular phenol; and next, converting hydroxyl on the phenyl into ethyoxyl by using chloroethane. The process mainly aims at solving the technical problem of serious equipment corrosion caused by sodium chloride in the prior art through salting out realized by using anhydrous sodium sulfate; after the old process in which sodium chloride is used is changed into the process in which the anhydrous sodium sulfate is used, the yield is greatly increased, and the environment pollution is reduced to a great extent. The process meets the national requirement for mainly protecting the environment and conforms to the decisions of firmly supporting the great decision of the state for protecting the environment, reducing pollution and putting into more investment for improving new processes.

The invention discloses a preparation method of a disperse dye capable of alkaline dyeing. The preparation method comprises the following step of carrying out a substitution reaction of a compound VI and a compound X-R2, wherein R1 is -H, -CH3, -C2H5, -OCH3 or -OC2H5, and R2 is C1-C4 straight-chain or branched-chain alkyl or benzyl, R8 is C1-C4 straight-chain or branched-chain alkyl, nitro, -NHCOCH3 or -NHCOC2H5, R9 and R10 are independently -H, halogen or nitro, and X is halogen. The disperse dye obtained by the preparation method shows a bright yellow color, can be used individually, also can be in combination use with alkali-resisting disperse dyes having other colors, and has excellent alkali resistance and hydrogen peroxide oxidization resistance stability.

A compound serving as a dichroic pigment which has a maximum absorption wavelength in a range of 350 nm to 510 nm is represented by the following Formula (1):

In Formula (1), R¹ represents a hydrogen atom or a C1-C20 alkyl group; R² through R⁴ are substituents which are not hydrogen atoms and each independently represent a C1-C4 alkyl group; n, m, and p are each independently an integer of 0 to 2; and Ar¹ represents a nitrogen-containing saturated heterocyclic group which is a 5 to 8-membered ring and in which (i) N is bonded to a phenylene group and (ii) at least one β-position is an oxygen atom or a sulfur atom.

The invention discloses a dioxybenzone containing anitro-azobenzene dye by an ether bond and a synthesizing method and application thereof, pertaining to the organic dye field, and particularly relates to an anitro-azobenzene dye that is connected with the dioxybenzone by the ether bond and application thereof in light polymerization. A typical chemical structure general formula of the compound of the anitro-azobenzene dye is showed on the right, wherein, n in the molecular structural formula (I) represents 1-6, R represents methyl, ethyl, propyl, butyl, amyl, hexyl or is completely the same as a substituting group at the other side of N. 4-bromomethyl dioxybenzone reacts with derivative of anitro-azobenzene compound that contains hydroxyl under alkaline conditions in a glass container, and the dioxybenzone containing anitro-azobenzene dye is prepared by the ether bond. The maximum absorption of the anitro-azobenzene dye is at a visible light area; therefore, the invention can be used as photoinitiator and the photoinitiator and an addition agent, triethanolamine, form a photosensitive system that is used for polymerization of visible light of vinyl monomers in solution or as photo-curing material.

A compound represented by formula: is disclosed. R is hydrogen or alkyl; X is alkylene; Y is a bond, ether, thioether, amine, amide, ester, thioester, carbonate, thiocarbonate, carbamate, thiocarbamate, urea, thiourea, alkylene, arylalkylene, alkylarylene, or arylene, wherein alkylene, arylalkylene, alkylarylene, and arylene are optionally at least one of interrupted or terminated by at least one of an ether, thioether, amine, amide, ester, thioester, carbonate, thiocarbonate, carbamate, thiocarbamate, urea, or thiourea; and Z is an acrylate, a methacrylate, an acrylamide, a methacrylamide, a styrenyl, or a terminal alkenylene having at least three carbon atoms. A composition including the compound, and a method of determining the degree of cure of a curable polymeric resin are also disclosed.

The invention discloses a preparation method of a bright yellow disperse dye. The preparation method comprises the following steps of carrying out a diazotization coupling reaction of a compound IV and a compound V under the action of sodium nitrite, wherein R3 is C1-C4 straight-chain or branched-chain alkyl, -OCH3 or -OC2H5, R4 and R5 are independently H, halogen or nitro but are not simultaneously -H or nitro, and R6 and R7 are independently methyl, ethyl, -C2H4CN, -C2H4OCH3, -C2H4OC2H5 or benzyl. The disperse dye obtained by the preparation method shows a bright yellow color, can be used individually, also can be in combination use with alkali-resisting disperse dyes having other colors, and has excellent alkali resistance and hydrogen peroxide oxidization resistance stability.

The invention belongs to the field of chemical industry, and particularly relates to a sun-proof disazo acid dye with an H acid structure and a preparation method of the sun-proof disazo acid dye. Thepreparation method comprises steps as follows: step 1), pentamethyl-4-piperidinol is subjected to chlorination, and a chlorinated intermediate product HALS-Cl is prepared; step 2), HALS-Cl and a disazo acid dye with the H acid structure are subjected to condensation, and the product, namely, the sun-proof disazo acid dye with the H acid structure is obtained finally. Aiming at solving the problemof low light fastness of the disazo acid dye with the H acid structure, two hindered amine light stabilized fragments are simultaneously introduced to the adjacent positions of an azo bond in the dyestructure, hydroxyl and amino are converted into an ether bond (-O-) and imino (-NH-) respectively, so that the oxidizing reaction of amino (-NH2) or hydroxyl (-OH) is effectively avoided, meanwhile,close-range protection of a disazo bond is realized, and a series of disazo acid dyes with excellent light fastness are developed.