Natural retarding agent for dyeing of cationic dye and using method of natural retarding agent

Abstract

The invention discloses a natural retarding agent for dyeing of cationic dye. The natural retarding agent is at least one of chitosan and derivatives thereof, wherein the concentration of the chitosan or the derivatives thereof is 0.1-4g / L. According to the retarding agent, natural chitosan or derivatives thereof, such as carboxymethyl chitosan and hydroxypropyl chitosan with different molecular weights are adopted for dyeing of cationic dye, and the problem that 1227 contains benzalkonium chloride and CTAB (cetyltrimethyl ammonium bromide) has strong fishy smell when a conventional cationic dye is used for dyeing are solved; and the prepared product has the quality consistent with that of a product prepared by adopting a conventional process, and has a certain antibacterial and anti-static performance. The technical scheme disclosed by the invention is simple in process and convenient to operate, does not have special requirement on cationic dye and equipment, and can be applied to large-scale production by utilizing conventional dyeing equipment.

Description

technical field The invention belongs to the technical field of dyeing and finishing, and relates to a dyeing method using natural chitosan or its derivatives as a cationic dye retarder, especially capable of realizing the wide adaptability of cationic dyes, and the worthy products are green and environmentally friendly and have antibacterial and antibacterial properties. Antistatic properties. Background technique Cationic dyes have complete chromatograms, bright colors, relatively simple dyeing process, and excellent color fastness. They are the best dyes for acrylic and cationic dyeable polyester dyeing. When cationic dyes are dyed by cationic dyes, because cationic dyes are positively charged and acrylic or cationic dyeable polyester fibers are negatively charged, when the dyeing temperature is higher than the glass transition temperature of acrylic or cationic dyeable polyester, cationic dyes can dye acrylic or cationic dyes. The speed of polyester fiber is very fast,...

AI Technical Summary

Problems solved by technology

When cationic dyes are dyed by cationic dyes, because cationic dyes are positively charged and acrylic or cationic dyeable polyester fibers are negatively charged, when the dyeing temperature is higher than the glass transition temperature of acrylic or cationic dyeable polyester, cationic dyes can dye acrylic or cationic dyes. The speed of polyester fiber is very fast, dyed fabrics are easy to cause uneven dyeing, so a certain amount of cationic surfactants such as 1227 (dodecyl dimethyl benzyl ammonium chloride) and CTAB (16 cetyl ammonium chloride) are often added in actual production Alkyltrimethylammonium bromide) as a retarding agent for dyeing, 1227 and CTAB have a significant retarding effect, but there are certain problems, such as: 1227 contains benzalkonium chloride, and CTAB has a strong fishy smell when used

And the improper use of the above-mentioned retarder may easily cause the color of the dyed fabric to be lighter, which will affect the utilization rate of the dye.

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