Preparation method of comb-shaped high molecular dispersion cleaning agent for lyocell-polyester interwoven fabric

Abstract

The present application relates to the field of textile auxiliaries, and discloses a preparation method of a comb-shaped high-molecular dispersion cleaning agent for lyocell-polyester interwoven fabric, which comprises the following steps: first, using cashew phenol polyoxyethylene ether and acrylic acid as raw materials, preparing cashew phenol polyoxyethylene acrylate through esterification reaction; and then, preparing poly-cashew phenol polyoxyethylene acrylate through free radical polymerization. The prepared poly-cashew phenol polyoxyethylene acrylate is a comb-shaped high-molecular polymer, which can be used in the cleaning process after lyocell-polyester interwoven fabric dyeing, can effectively wash off the floating color on the fiber surface, and can disperse the floating color in water, so that the dye is prevented from being re-stained, and the color fastness of the fabric is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of textile auxiliaries, in particular to a preparation method of a comb-shaped high molecular dispersion cleaning agent for Lyocell-polyester interwoven fabric. BACKGROUND

[0002] Lyocell fiber, also known as new solvent method regenerated cellulose fiber, is a kind of regenerated cellulose fiber which takes cotton linters, trees and other renewable natural cellulose resources as main raw materials, takes NMMO (N-methyl morpholine-N-oxide) as solvent, and is made by dry spraying wet spinning. It has the characteristics of high dry and wet strength, good dimensional stability, excellent touch, moisture absorption and air permeability (comfortable to wear), softness and drape (silk-like luster) and excellent spinnability, and is mainly applied in high-end clothing, apparel, home textiles and industrial fields. Lyocell fiber is an upgraded product of viscose fiber. With the increasingly strict national environmental protection policy, the development of viscose fiber is limited, and the process technology of Lyocell fiber is becoming more and more mature. At present, Lyocell fiber and polyester interwoven fabric not only have various types, but also have excellent performance. Combining the excellent performance of various single fibers, the complementary performance is strong, and it is deeply loved by the public. The interweaving of polyester and Lyocell fiber not only maintains the firmness, wrinkle resistance and dimensional stability of polyester, but also improves the performance of the interwoven fabric, making the interwoven fabric smooth and clean, bright in color, comfortable in hand feeling, and having the dual advantages of wool fabric and chemical fiber fabric. Therefore, it is of great practical significance to study the dyeing and finishing process of Lyocell fiber and polyester interwoven fabric.

[0003] In the traditional dyeing and finishing process, after polyester fabric is dyed with disperse dyes, reduction cleaning is needed to wash off the floating color on the surface of the fiber to improve the color fastness of the fabric. However, the reduction cleaning process often uses sodium hydrosulfite as a reducing agent. Sodium hydrosulfite is easy to absorb oxygen and oxidize when exposed to air, and can heat up when a small amount of water or humid air is absorbed, causing yellow smoke combustion and even explosion. Not only does it bring many safety hazards to actual production, but also causes great damage to the interwoven fabric. Therefore, it is particularly important to develop a cleaning agent for the post-dyeing cleaning process of Lyocell fiber and polyester interwoven fabric, which not only needs to ensure that the color fastness after cleaning meets the requirements, but also cannot damage the fabric. SUMMARY

[0004] The technical problem to be solved by the present application is to overcome the defects of the prior art, and to provide a preparation method of a comb-shaped high molecular dispersion cleaning agent for Lyocell-polyester interwoven fabric.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0006] A: According to the mass ratio, 500-800 parts of cardanol polyoxyethylene ether, 60-80 parts of acrylic acid, and 2-10 parts of p-toluene sulfonic acid are added to a reaction container, and heating and stirring are started. When the temperature is raised to 100-120℃, vacuum is opened, and the reaction is kept at a vacuum degree of -0.06~-0.095 MPa for 2-5 h to obtain cardanol polyoxyethylene acrylate:

[0007] B: 20-40 parts of cardanol polyoxyethylene acrylate and 50-80 parts of water are added to a reaction container equipped with a condensation reflux device, and stirring is started. When the temperature is raised to 70-100℃, 5-20 parts of a 10% catalyst aqueous solution is slowly added dropwise, and the dropwise addition is completed in 0.5-1.0 h. The reaction is kept at 70-100℃ for 1-3 h to obtain a poly cardanol polyoxyethylene acrylate dispersion cleaning agent. The reaction equation is as follows:

[0008]

[0009] wherein n=0, 2, 4, 6; 5≤m≤10; p≥2;

[0010] Preferably, the catalyst is one of ammonium persulfate and sodium persulfate; and the number of oxygen ethylene (-CH2CH2O-) segments in the molecular structure of the cardanol polyoxyethylene ether is 5-10.

[0011] Thanks to the use of the above technical solution, the present application has the following advantages:

[0012] The bio-based cardanol polyoxyethylene ether is used as a raw material, which has excellent dispersion and leveling properties for dyes. After esterification and homopolymerization, a comb-shaped high molecular structure is formed, and the cardanol polyoxyethylene chain serves as a side chain in the molecular structure. The space between the side chains not only effectively increases the adsorption capacity of the dye, but also stabilizes the adsorbed dye molecules in the structure through intermolecular forces, avoiding the return of the washed dye to the fabric surface and improving the color fastness of the fabric. In addition, the cleaning agent has good surface activity in the pH range of weak acid to weak alkali due to the presence of more hydrophilic polyoxyethylene side chains, and has less effect on Lyocell fibers in the post-dyeing cleaning process of Lyocell fiber and polyester interwoven fabric. DETAILED DESCRIPTION

[0013] The present application will be further described below through specific embodiments. EMBODIMENT

[0014] A: The components are proportioned by mass parts, 750 kg of cardanol polyoxyethylene ether with 10 oxygen ethylene chain segments, 72 kg of acrylic acid, and 7 kg of p-toluenesulfonic acid are added to a reaction container, heating and stirring are started, when the temperature rises to 115℃, vacuum is started, and the reaction is kept at -0.095 MPa for 4 hours to obtain cardanol polyoxyethylene acrylate:

[0015] B: 30 kg of cardanol polyoxyethylene acrylate, 50 kg of water are added to a reaction container equipped with a condensation reflux device, stirring is started, and the temperature is raised to 85℃; after mixing evenly, 20 kg of 10% ammonium persulfate aqueous solution is slowly added dropwise, the dropwise addition time is 0.5 hours, and after the dropwise addition is completed, it is kept at 85℃ for 2 hours to obtain a polyacrylic cardanol polyoxyethylene ester dispersing cleaning agent. Example

[0016] A: The components are proportioned by mass parts, 700 kg of cardanol polyoxyethylene ether with 9 oxygen ethylene chain segments, 75 kg of acrylic acid, and 7 kg of p-toluenesulfonic acid are added to a reaction container, heating and stirring are started, when the temperature rises to 110℃, vacuum is started, and the reaction is kept at -0.095 MPa for 4 hours to obtain cardanol polyoxyethylene acrylate:

[0017] B: 30 kg of cardanol polyoxyethylene acrylate, 60 kg of water are added to a reaction container equipped with a condensation reflux device, stirring is started, and the temperature is raised to 85℃; after mixing evenly, 10 kg of 10% sodium persulfate aqueous solution is slowly added dropwise, the dropwise addition time is 1.0 hour, and after the dropwise addition is completed, it is kept at 90℃ for 1.5 hours to obtain a polyacrylic cardanol polyoxyethylene ester dispersing cleaning agent. Example

[0018] A: The components are proportioned by mass parts, 660 kg of cardanol polyoxyethylene ether with 7 oxygen ethylene chain segments, 75 kg of acrylic acid, and 6 kg of p-toluenesulfonic acid are added to a reaction container, heating and stirring are started, when the temperature rises to 110℃, vacuum is started, and the reaction is kept at -0.095 MPa for 4 hours to obtain cardanol polyoxyethylene acrylate:

[0019] B: 30 kg of cardanol polyoxyethylene acrylate, 60 kg of water are added to a reaction container equipped with a condensation reflux device, stirring is started, and the temperature is raised to 80℃; after mixing evenly, 10 kg of 10% ammonium persulfate aqueous solution is slowly added dropwise, the dropwise addition time is 0.5 hours, and after the dropwise addition is completed, it is kept at 85℃ for 2 hours to obtain a polyacrylic cardanol polyoxyethylene ester dispersing cleaning agent.

[0020] 1. Application process

[0021] Soda ash 0.5 g / L

[0022] Cleaning agent 2.0g / L

[0023] Process flow: dyeing→ cooling to 80℃→ adding dispersing cleaning agent and soda ash and then heating to 95℃, keeping for 10~20min→ draining→ washing for 5~10min→ draining

[0024] 2. Color fastness test

[0025] Soaping fastness was determined according to GB / T 3921-2008 "Textiles - Colour fastness to soaping", rubbing fastness was determined according to GB / T 3920-2008 "Textiles - Colour fastness to rubbing", and the test results are shown in Table 1.

[0026] Table 1. Dispersing cleaning agent color fastness test results

[0027]

[0028] As shown in Table 1, after using the high molecular comb dispersing cleaning agent to clean the polyester fabric, the fabric fastness reaches the level of traditional dyeing process.

[0029] The technical scope of the present application is not limited to the content in the above description, and those skilled in the art can make various modifications and changes to the above embodiments without departing from the technical idea of the present application, and these modifications and changes should all belong to the scope of the present application.

Claims

1. A method for preparing a comb-shaped polymeric dispersion cleaning agent for lyocell-polyester interwoven fabrics, characterized in that... Includes the following steps: A: According to the mass ratio, add 500-800 parts of cashew phenol polyoxyethylene ether, 60-80 parts of acrylic acid, and 2-10 parts of p-toluenesulfonic acid to the reaction vessel. Start heating and stirring. When the temperature reaches 100-120℃, turn on the vacuum and maintain the reaction at a vacuum degree of -0.06~-0.095MPa for 2-5 hours to obtain cashew phenol polyoxyethylene acrylate, with the following general structural formula, where n=0, 2, 4, 6; 5≤m≤10: ； B: Add 20-40 parts of cashew nut acrylate polyoxyethylene ester and 50-80 parts of water to a reaction vessel equipped with a reflux condenser, turn on the stirrer, and heat to 70-100℃; after mixing evenly, slowly add 5-20 parts of a 10% catalyst aqueous solution over a period of 0.5-1.0 hours. After the addition is complete, keep the mixture at 70-100℃ for 1-3 hours to obtain cashew nut acrylate polyoxyethylene ester.

2. The method for preparing the comb-shaped polymeric dispersion cleaning agent for lyocell-polyester interwoven fabrics according to claim 1, characterized in that... The number of oxyethylene (-CH2CH2O-) segments in the molecular structure of the cashew phenol polyoxyethylene ether described in step A is 5-10.

3. The method for preparing the comb-shaped polymeric dispersion cleaning agent for lyocell-polyester interwoven fabrics according to claim 1, characterized in that... The catalyst mentioned in step B is one of ammonium persulfate or sodium persulfate.

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