34results about "Preparation by etherification" patented technology

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.

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 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 discloses bright yellow disperse dyes. The bright yellow disperse dye is a compound shown in formula B, wherein R3 is C1-C4 straight chain or branched chain alkyl, -OCH3 or -OC2H5, R4 and R5 are independently H, halogen or nitro, but not While being -H or nitro, R6 and R7 are independently methyl, ethyl, -C2H4CN, -C2H4OCH3, -C2H4OC2H5 or benzyl. The disperse dye of the present invention is bright yellow, can be used as a single color, and can also be used in combination with alkali-resistant disperse dyes of other colors. It has excellent alkali resistance and hydrogen peroxide oxidation stability, and this feature makes it not only Applied to general alkaline printing and dyeing of polyester fiber materials, it can also be applied to scouring dyeing one-bath process or bleaching one-bath process, as well as disperse reactive same-sizing printing process, and can meet environmental protection requirements.

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.

The invention discloses an application of a disperse dye capable of alkaline dyeing. The application of the disperse dye capable of alkaline dyeing and represented by a formula C in dyeing or printing of a polyester fiber material is provided, 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, and R9 and R10 are independently -H, halogen or nitro. The disperse dye 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 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.