Synthesis method and application of formaldehyde-free acid dye fixing agent

Abstract

The invention discloses a synthesis method and an application of a formaldehyde-free acid dye fixing agent and belongs to the field of textile chemical technologies. Acrylic acid, 2-isonaphthol and 2-acrylamide-2-methyl propane sulfonic acid are used as raw materials, ammonium acetate is added to be used as an initiator, nickel chloride is added to be used as a catalyst, the formaldehyde-free acid dye fixing agent is synthesized and applied to fixation treatment of nylon, silk and wool textiles as well as nylon, silk and wool blended textiles, the color fastness is improved, soaping fastness, rubbing fastness, perspiration fastness and the like of fibers after fixation treatment are improved more obviously, the raw materials and the product do not contain formaldehyde, and compared with acid dye fixing agents for beds in the market, the formaldehyde-free acid dye fixing agent is environment-friendly and efficient; meanwhile, the preparation method is simple and beneficial to industrial popularization and has the higher economic benefit.

Description

Technical field: [0001] The invention discloses a synthesis method and application of a formaldehyde-free acid dye fixing agent and belongs to the technical field of textile chemical industry. Background technique: [0002] Cotton, silk, wool and their blended textiles are often dyed with acid dyes. Traditional acid dyes refer to dyes that contain acidic groups in their molecular structure. Most of the acidic groups contained are in the form of sulfonates, and only a few varieties exist in the form of carboxylates. When acid dyes are dyed, there are two different attractive forces between the dye and protein fibers or Jinlun fibers: the intermolecular attraction between the dye and the non-polar part of the fiber, including oxygen bonds and van der Waals forces; the dye molecules ionize into bands in water The negatively charged anion binds to the positively charged amino group on the fiber by ionic bond, and the sulfonic acid group on the molecular structure of the acid dye mak...

AI Technical Summary

Problems solved by technology

But the disadvantage is that the color fastness is not greatly improved, and because of the small molecules of this type of color fixing agent, the color fixing effect of dipping is not very good. Generally, padding is used for color fixing, which is used for acid dye color fixing treatment. There is a certain improvement, but it will affect the shade and feel of the fabric

The diallyl polymer cationic color-fixing agent can form a film on the surface of the fabric, and the treated fabric has good color and luster, which is better for reactive dyes. However, due to the lack of reactive groups, secondary amino groups and Amino group, poor effect on wet iron fastness and chlorine immersion fastness

[0005] In 2012, Wang Li of Soochow University published a master's thesis titled "Synthesis and Application of Acid Dye Fixing Agent", using acrylic acid (AA), acrylamide (AM), 2-acrylamide-2-methylpropanesulfonate Acid (AMPS) as raw material, ammonium persulfate as initiator, a formaldehyde-free acid dye fixing agent 3A was synthesized by solution polymerization, the pH value of the fixing solution was 2.0, and the bath ratio was 1:30. Weight 3%, 80 ℃ for nylon acid dye dyed fabrics for 40min color fixation, the soaping, friction and perspiration fastness of nylon after fixation are obviously improved, the soaping fastness can reach level 4, dry rubbing The fastness can reach grade 4, the wet rubbing fastness can reach grade 3-4, and the acid-base perspiration fastness can reach grade 4, and the synthetic raw materials and products do not contain formaldehyde, which is different from the acid dyes commonly used in the market for color fixation. Compared with the acid color fixing agent, it is a relatively environmentally friendly product, which is the closest to the prior art of the present invention. However, after the acid color fixing agent fixes the cotton fabric, the fabric feel will be affected to a certain extent. And the color fixing effect of silk fabrics is not excellent enough, resulting in relatively narrow application, which is not conducive to industrialization

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