阅读说明：本技术 一种棉用耐氯固色剂及其制备方法 (Chlorine-resistant color fixing agent for cotton and preparation method thereof ) 是由 袁金亮 杨中新 王胜鹏 于 2020-06-13 设计创作，主要内容包括：本发明公开一种棉用耐氯固色剂及其制备方法,按质量份计,包括以下原料：二甲基二烯丙基氯化铵30-50份,烯丙基胺类化合物1-5份,烯丙基肼类化合物5-10份,烯丙基脲类化合物1-5份,冰醋酸1-5份,过氧化合物0.1-0.5份,去离子水20-60份。本发明通过氨基与冰醋酸中和以及具有的季铵化结构,使制得的耐氯固色剂分子呈强阳离子性质,阳离子基团与染料中的阴离子基团进行静电结合,在织物表面形成不溶性色淀,封闭了染料往水中溶解,从而提高固色效果。(The invention discloses a chlorine-resistant color fixing agent for cotton and a preparation method thereof, wherein the chlorine-resistant color fixing agent comprises the following raw materials in parts by mass: 30-50 parts of dimethyl diallyl ammonium chloride, 1-5 parts of allylamine compounds, 5-10 parts of allylhydrazine compounds, 1-5 parts of allylurea compounds, 1-5 parts of glacial acetic acid, 0.1-0.5 part of peroxy compounds and 20-60 parts of deionized water. According to the invention, through the neutralization of amino and glacial acetic acid and the quaternary ammonium structure, the prepared chlorine-resistant color fixing agent molecule has a strong cationic property, and the cationic group and the anionic group in the dye are subjected to electrostatic combination to form insoluble color lake on the surface of the fabric, so that the dye is sealed to be dissolved in water, and the color fixing effect is improved.)

1. The chlorine-resistant color fixing agent for cotton is characterized by comprising the following raw materials in parts by mass: 30-50 parts of dimethyl diallyl ammonium chloride, 1-5 parts of allylamine compounds, 5-10 parts of allylhydrazine compounds, 1-5 parts of allylurea compounds, 1-5 parts of glacial acetic acid, 0.1-0.5 part of peroxy compounds and 20-60 parts of deionized water.

2. The chlorine-resistant color fixing agent for cotton according to claim 1, wherein the allylamine compound is allylamine or diallylamine.

3. The chlorine-resistant color fixing agent for cotton according to claim 1, wherein the allylhydrazine compound is allylhydrazine or allylhydrazine hydrochloride.

4. The chlorine-resistant fixing agent for cotton according to claim 1, wherein the allylurea compound is allylsemicarbazide sulfate.

5. The chlorine-resistant fixing agent for cotton according to claim 1, wherein the peroxide compound is ammonium persulfate or benzoyl peroxide.

6. A method for preparing the chlorine-resistant color fixing agent for cotton, which is characterized by comprising the following steps:

1) respectively adding allyl amine compounds, allyl hydrazine compounds, allyl urea compounds and 40-50 parts of deionized water in a formula amount into a reaction kettle, and adding glacial acetic acid in a formula amount under the condition of stirring for neutralization;

2) continuously adding the dimethyl diallyl ammonium chloride with the formula amount into the reaction kettle, heating to 70-75 ℃, and keeping the temperature and stirring;

3) dissolving a peroxide compound with a formula amount in the balance of deionized water, slowly dropwise adding a peroxide aqueous solution into a reaction kettle, keeping temperature control, directly carrying out polymerization reaction at 70-90 ℃, continuously heating to 90-110 ℃ after dropwise adding the peroxide aqueous solution, keeping the temperature for reaction for 1-5 hours, and finishing the reaction.

7. The method for preparing the chlorine-resistant color fixing agent for cotton according to claim 6, wherein the glacial acetic acid neutralization is carried out at the temperature of less than or equal to 40 ℃ in the step 1).

Technical Field

The invention relates to a chlorine-resistant color fixing agent for cotton and a preparation method thereof.

Background

In the process of cotton textile processing, the processes of desizing, refining, bleaching, dyeing, after finishing and the like are required, wherein the dyeing process is very important, some cotton textiles can obtain bright colors through the action of dyes, but the dyes in the textiles can fall off from the dyed textiles under the action of oxygen in the air or the influence of humidity, so that the textiles fade, stain, cross color and the like, and therefore, in the dyeing process, a certain amount of color fixing agent is generally required to be added to enhance the fastness of the pigments on the textiles.

The color fixing agent for cotton is various, and is generally adsorbed inside fibers in a film forming mode or forms neutral ion lake with dye, so that the color fixing effect is achieved. The dye used by the cotton fabric generally contains amino groups, and the amino groups are easily oxidized by active chlorine (tap water is generally disinfected by sodium hypochlorite, and clothes are disinfected by disinfectant during washing), so that color change is caused, and the dyeing process needs not only color fixation but also chlorine resistance treatment.

The chlorine-resistant color fixing agent is produced according to the demands, and a patent CN105504227A discloses a synthesis method of a novel environment-friendly chlorine-resistant color fixing agent, wherein epoxy chloropropane, diethylenetriamine and diallylamine are used for preparing the novel environment-friendly chlorine-resistant color fixing agent through reaction; patent CN106758387A discloses an environment-friendly formaldehyde-free chlorine-resistant color fixing agent for cotton, which is prepared by preparing quaternary ammonium cellulose ether, a polyamine color fixing agent, a water-based polyammonium salt and an organic silicon polymer, and then compounding to form the chlorine-resistant color fixing agent for cotton; patent CN110735338A discloses a compounding method of an environment-friendly chlorine-resistant color fixing agent, in which an oxygen scavenger (carbohydrazide or hydrazine acetate) and a chelating agent, and a chlorine-resistant intermediate are added; patent CN103774467A discloses an active chlorine-resistant color fixing agent for fabric and a preparation method thereof, wherein the color fixing agent for active cotton is synthesized by using raw materials such as dimethyldiallylamine, and then, polyethylene polyamine is added to synthesize the chlorine-resistant color fixing agent, and the polyethylene polyamine compound with the chlorine-resistant function is a polyethylene polyamine compound, but the polyethylene polyamine compound is a monomolecular raw material and cannot play a color fixing role, and even plays a role in dissolving dye in water, so that the whole color fixing effect is reduced.

The above methods still have some problems: 1. the color fixing effect on cotton is general and can not reach the effect of the existing formaldehyde-free color fixing agent; 2. the chlorine resistance effect is mainly acted by some small molecular amine groups (such as patent CN110735338A and patent CN103774467A), the small molecular amine is not firmly combined with the fabric, and the chlorine resistance effect is not washable.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a chlorine-resistant color fixing agent for cotton and a preparation method thereof.

In order to achieve the purpose, the invention adopts a chlorine-resistant color fixing agent for cotton, which has the following structural formula:

the reaction formula is as follows:

the chlorine-resistant color fixing agent comprises the following raw materials in parts by mass: 30-50 parts of dimethyl diallyl ammonium chloride, 1-5 parts of allylamine compounds, 5-10 parts of allylhydrazine compounds, 1-5 parts of allylurea compounds, 1-5 parts of glacial acetic acid, 0.1-0.5 part of peroxy compounds and 20-60 parts of deionized water.

As an improvement, the allylamine compound adopts allylamine or diallylamine.

As an improvement, the allyl hydrazine compound adopts allyl hydrazine or allyl hydrazine hydrochloride.

As an improvement, the allyl urea compound adopts allyl semicarbazide sulfate.

As a modification, the peroxide compound adopts ammonium persulfate or benzoyl peroxide.

In addition, the invention also provides a preparation method of the chlorine-resistant color fixing agent for cotton, which comprises the following steps:

1) respectively adding allyl amine compounds, allyl hydrazine compounds, allyl urea compounds and 40-50 parts of deionized water in a formula amount into a reaction kettle, and adding glacial acetic acid in a formula amount under the condition of stirring for neutralization;

2) continuously adding the dimethyl diallyl ammonium chloride with the formula amount into the reaction kettle, heating to 70-75 ℃, and keeping the temperature and stirring;

3) dissolving a peroxide compound with a formula amount in the balance of deionized water, slowly dropwise adding a peroxide aqueous solution into a reaction kettle, keeping temperature control, directly carrying out polymerization reaction at 70-90 ℃, continuously heating to 90-110 ℃ after dropwise adding the peroxide aqueous solution, keeping the temperature for reaction for 1-5 hours, and finishing the reaction.

As an improvement, the glacial acetic acid neutralization is carried out at the temperature of less than or equal to 40 ℃ in the step 1).

Compared with the prior art, the invention has the beneficial effects that:

1. according to the invention, through the neutralization of amino and glacial acetic acid and the quaternary ammonium structure, the prepared chlorine-resistant color fixing agent molecule has a strong cationic property, and the cationic group and the anionic group in the dye are subjected to electrostatic combination to form insoluble color lake on the surface of the fabric, so that the dye is sealed to be dissolved in water, and the color fixing effect is improved.

2. The color fixing agent prepared by polymerization of olefin bonds has large molecular weight, high film-forming property on cotton fabrics, capability of sealing dye and preventing the dye from being separated out from cotton fibers, and good washability because the large molecules are not easy to wash away.

3. The molecules of the color fixing agent contain hydrazine and urea structures, the potential of the structures is lower than the amino potential in common dyes, when free chlorine in water contacts fabrics, the free chlorine can preferentially react with the hydrazine or urea structures, the dyes are protected from being oxidized by the structures, and therefore the chlorine-resistant effect is achieved.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the terms used herein in the specification of the present invention are for the purpose of describing particular embodiments only and are not intended to limit the present invention.