Environment-friendly polyester color-modifying agent and preparation method thereof

Abstract

The invention discloses an environment-friendly polyester color-modifying agent and a preparation method thereof and belongs to the field of printing and dyeing auxiliaries and preparation methods thereof. The environment-friendly polyester color-modifying agent comprises, by weight, the following components of 1-10% of cyclic carboxylic ester, 5-20% of a water-soluble block copolymer, 10-25% of asurfactant, 2-5% of organic acid, 1-10% of polyol and 30-80% of deionized water. The prepared polyester color-modifying agent has excellent migration properties and dispersity as well as good effectsin oil removal and oligomer removal and can achieve a good color-modifying effect on polyester dyeing defects caused by multiple reasons, and the performance is far better than an existing color-modifying agent; potential irritation or toxicity brought by substances including an aromatic ring swelling agent, an organic solvent and the like can be avoided; and solid content only accounts for 45-50% of the existing color-modifying agent, phosphorus is not contained, the content of auxiliaries in water is remarkably reduced, the COD value of discharged wastewater is lowered, and therefore the polyester color-modifying agent is environmentally friendly and safe in a true sense and is obviously better than the existing color-modifying agent.

Description

technical field [0001] The invention relates to the field of printing and dyeing auxiliaries and a preparation method thereof, in particular to an environment-friendly polyester color repair agent and a preparation method thereof. Background technique [0002] As the world's largest synthetic fiber, polyester fiber has high strength, good gloss, durability, good wrinkle resistance, and strong stability. It is loved by consumers and widely used in clothing, home textiles, various decorative fabrics and industrial supplies. However, polyester has a compact structure, high crystallinity, and lacks active groups that can combine with dyes. Therefore, disperse dyes that are also hydrophobic are used for dyeing. In the low temperature stage, the dyes are adsorbed on the fiber surface. When the temperature rises, the polyester molecular chain The movement is intensified, and larger gaps are formed in an instant, so that the dye molecules can enter the interior of the fiber, so dyei...

AI Technical Summary

Problems solved by technology

However, in the document "Correct Evaluation and Use of Phthalate Plasticizers", it is shown that the phthalate plasticizers contain benzene rings, which are toxic to a certain extent, and are not non-toxic as advertised in commercial, and are not Partial use in children's products is prohibited, so the above-mentioned environmentally friendly puffing agents are not environmentally safe, and they also have potential toxicity and irritation

In addition, organic solvents used in small molecule alcohols, esters or color repair agents containing benzene rings also have certain toxicity and chronic irritation to the human body.

[0004] Chinese patent CN101498107B adopts bulking agent (alcohol ether, phthalimide), emulsifying dispersant, solvent (alcohol or alcohol ether) compounded a kind of repairing agent, has good migration property, but alcohol solvent is easy Flammable, volatile, highly irritating

However, in actual production, there are many reasons for dyeing defects, and most of the conventional color correction agents can only have a good color correction effect on defects caused by uneven distribution of dyes.

However, the oligomers contained in the polyester fiber itself will diffuse from the inside to the surface under high temperature conditions, forming white crystals, which have low solubility and poor dispersion in the working fluid, and are difficult to remove when sticking to fibers and equipment; Clean oils and additives in commercial disperse dyes will also cause color flowers, color spots, stains, and oil spots

For the defects caused by these reasons, the color correcting agents in the prior art are difficult to solve, and the expanding agents used in it are all aromatic ring substances containing benzene rings, which have potential toxicity and irritation, and are not real. Environmentally Friendly Color Corrector

[0005] To sum up, the current industry lacks a safe and environmentally friendly compound that can not only address polyester dyeing defects caused by various reasons, but also have good results, and can avoid potential irritation or toxicity caused by aromatic ring-containing swelling agents and organic solvents. Color corrector

Images