Cationic color fixing agent and preparation method and application thereof

Abstract

The invention provides a cationic color fixing agent and a preparation method and application thereof. The cationic color fixing agent is obtained by polymerization reaction of an oil-soluble monomer, a cationic monomer and a reactive monomer in a solvent under the action of a radical initiator, wherein the oil-soluble monomer is one or the combination of several of styrene, acrylonitrile and acrylate; the cationic monomer is one or the combination of acryloxyethyl alkyl quaternary ammonium salt and/or allyl alkyl quaternary ammonium salt; the reactive monomer is one or the combination of several of allyl glycidyl ether, hydroxyl-containing acrylics, vinyl trimethoxy silane, vinyl triethoxy silane, acrylamide, crylic acid and methacrylic acid. The cationic color fixing agent is insoluble in water and can be dissolved in a weak polar solvent and/or non-polar solvent; besides, after non-aqueous solvent dyeing of reactive dyes, the cationic color fixing agent can be directly used in the on-going fixing process without washing.

Description

technical field [0001] The invention relates to a color-fixing agent for post-finishing of textiles, in particular to a color-fixing agent suitable for direct in-situ color fixing after dyeing with reactive dyes and non-aqueous solvents, and belongs to the technical field of textile auxiliaries. Background technique [0002] At present, reactive fibers are mostly dyed with reactive dyes. Because reactive dyes are easily hydrolyzed in water, not only a large amount of reactive dyes are wasted in the dyeing process, but also a large amount of water is consumed and a large amount of high-chroma sewage that is difficult to treat is discharged. insurmountable problems that have always existed. [0003] In order to avoid the hydrolysis reaction of reactive dyes and improve the utilization rate of reactive dyes, scientists have paid attention to and studied the dyeing of reactive dyes in non-aqueous media very early. The advantage of using non-aqueous media for dyeing is to avoid t...

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Problems solved by technology

[0004] The recent research on non-aqueous solvent dyeing of reactive dyes has made great progress. The non-aqueous solvent dyeing method of reactive dyes developed by Guangdong Esquel Textile Co., Ltd. has a fixation rate of more than 95%. After dyeing with reactive dyes, most dyes can be mixed with fibers. Reactive reaction, firmly combined with the fiber through chemical bonds, but there is still a small part of the dye, which does not form a chemical bond with the fiber, but remains on the surface of the fiber (this part of the residual dye accounts for about 1-5%) ), this part of the residual dye will affect the color fastness if it does not go through the post-treatment process; and the conventional color-fixing process has the following disadvantages:

[0005] 1) Conventional reactive dye fixing agents are water-soluble, easily soluble in water, and most of them are in the form of aqueous solution or emulsion, and can only be fixed in water medium, not suitable for weak polarity or non-polarity Non-toxic organic solvents, when used in organic solvents, they are difficult to dissolve and prone to flocculation and precipitation;

[0006] 2) Since conventional color-fixing agents can only be used in water medium, it is necessary to wash the dyed textiles to remove floating colors before color-fixing treatment, otherwise the unwashed floating colors on the fiber surface will dissolve or migrate in the aqueous solution, It leads to dyed flowers, which increases water consumption on the one hand, and on the other hand has higher requirements on the operation of the washing process;

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