Soaping agent and preparation method thereof

Abstract

The invention discloses a soaping agent and a preparation method thereof, and particularly relates to the technical field of textile printing and dyeing auxiliaries. The soaping agent comprises the following components in parts by mass: 10-20 parts of an anti-contamination copolymer, 10-15 parts of fatty alcohol-polyoxyethylene ether O-20, 5-10 parts of cocoanut fatty acid diethanolamide and the balance of water, and the anti-contamination copolymer is formed by copolymerization of maleic anhydride, acrylic acid and undecyl hydroxyethyl imidazoline quaternary ammonium salt under the action of ammonium persulfate; the soaping agent provided by the invention has excellent staining resistance and cleaning ability, and the fabric soaped by the soaping agent has good color fastness and dry and wet rubbing color fastness.

Description

Technical Field

[0001] The invention belongs to the technical field of textile printing and dyeing auxiliaries, and specifically relates to a soaping agent and a preparation method thereof. Background Art

[0002] Acid dyes are an important choice for dyeing protein fibers such as silk, wool and nylon. The floating color and staining problems in the dyeing process have always been technical difficulties in the industry. Floating color not only affects the color fastness and color brightness of the product, but may also stain the fabric during washing, especially the light-colored or white parts, resulting in a decline in product quality.

[0003] Although the soap detergents currently available on the market can remove floating colors to a certain extent, they still have deficiencies in terms of anti-staining effect, use temperature restrictions, and environmental performance. Although some soap detergents can remove floating colors, their anti-staining effect is not ideal, resulting in staining on fabrics after washing. Summary of the invention

[0004] In view of the shortcomings of the prior art, the present invention aims to provide a soaping agent with anti-staining and high color fastness and a preparation method thereof. The soaping agent achieves efficient removal of floating color and excellent anti-staining effect through a specific formula and preparation process.

[0005] To achieve the above object, the present invention discloses the following technical solutions:

[0006] In a first aspect, the present invention provides a soaping agent, which comprises the following components in parts by mass:

[0007] 10-20 parts of anti-fouling copolymer;

[0008] 10-15 parts of fatty alcohol polyoxyethylene ether O-20;

[0009] Coconut oil fatty acid diethanolamide 5-10 parts;

[0010] Add water to 100 parts.

[0011] Preferably, the method for preparing the anti-fouling copolymer comprises the following steps:

[0012] S1-1. The undecyl hydroxyethyl imidazoline quaternary ammonium salt was mixed with water in a mass ratio of 1:5 and stirred at 55 °C to completely dissolve, and a 30wt% aqueous sodium hydroxide solution was added to adjust the pH to 7.5 ± 0.2 to obtain a solution A;

[0013] S1-2. Maleic anhydride and water were stirred and mixed at a mass volume ratio of 0.6:1 g / mL to obtain solution B;

[0014] S1-3. Under the protection of inert gas, heat solution A to 60-80 °C, and simultaneously dropwise add acrylic acid, solution B, and 0.082 g / mL aqueous ammonium persulfate solution respectively. The dropping time is 2 h. After the dropping is completed, maintain the temperature at 80 °C and react for 2 h. The whole reaction process is carried out under stirring at 200 r / min. After the reaction is completed, cool to room temperature to obtain the anti-staining copolymer;

[0015] The molar ratio of the acrylic acid, maleic anhydride, and undecyl hydroxyethyl imidazoline quaternary ammonium salt is 1.6:1:(0.4-0.7);

[0016] The dosage of ammonium persulfate is 3-6 wt% of the sum of the masses of acrylic acid, maleic anhydride, and undecyl hydroxyethyl imidazoline quaternary ammonium salt.

[0017] Preferably, by mass fraction, the soap detergent includes the following components:

[0018]

[0019] In a second aspect, the present invention provides a preparation method of the foregoing soap detergent, and the preparation method includes the following steps:

[0020] S2-1. Add the anti-staining copolymer, fatty alcohol polyoxyethylene ether O-20, and water into the reaction kettle, slowly heat to 30-40 °C, and stir for 0.5-1 hour to form a mixed solution and keep it warm for standby;

[0021] S2-2. Add coconut oil fatty acid diethanolamide to the mixed solution, keep the temperature at 30-40 °C, and continue to stir for 1-2 hours to obtain the soap detergent.

[0022] In the present invention:

[0023] The anti-staining copolymer obtained by copolymerizing acrylic acid, maleic anhydride, and undecyl hydroxyethyl imidazoline quaternary ammonium salt mainly plays a chelating and dispersing role in the soap detergent, thereby improving the soaping effect. This anti-staining copolymer can effectively chelate Ca 2+ plasma, keep the reactive dyes water-soluble, and then form an association body with the dyes, stably disperse the floating color in the washing liquid, prevent it from redyeing the fiber again, and significantly improve the soaping effect of the dyed fabric, including washing off the floating color and preventing color staining. Especially in the soaping of printed fabrics, it can thoroughly clean the residual printing paste.

[0024] Fatty alcohol polyoxyethylene ether O-20, relying on its emulsifying, dispersing, scouring, and wetting properties, can emulsify and disperse dirt such as grease and wax in the soap detergent, dissolve them in water for easy removal; it can penetrate into the fabric fibers, wash off the attached dirt and floating color, wet the fabric surface, and facilitate subsequent cleaning and rinsing; at the same time, it has an affinity for dyes and can be used as a leveling agent and color intensifier to improve the color brightness and uniformity of the fabric.

[0025] Coconut oil fatty acid diethanolamide mainly exhibits the functions of foaming and foam stabilizing, thickening and emulsifying, and penetrating and decontaminating in the soaping agent. It can increase the foam richness and stability, making the cleaning more thorough; as a thickening agent and emulsifier, it improves the viscosity stability of the soaping agent, facilitating its adhesion to the fabric and emulsifying oil and grease dirt; it also has a certain ability to penetrate and decontaminate, and can penetrate into the fiber interior to remove deep dirt and floating color.

[0026] Advantages of the present invention:

[0027] The soaping agent provided by the present invention has excellent anti-staining ability and washing ability, and the fabric after soaping has good color fastness and dry and wet rubbing color fastness. Specific embodiments

[0028] To better illustrate the purpose, technical solution and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments. Those skilled in the art should understand that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] Unless otherwise specified, the test methods used in the specific embodiments are all conventional methods; the materials, reagents, etc. used, unless otherwise specified, can all be obtained from commercial channels; the percentages mentioned in the specific embodiments, unless otherwise specified, are all mass percentages.

[0030] In the present invention:

[0031] Maleic anhydride: purchased from Shandong Xuchen Chemical Technology Co., Ltd.;

[0032] Acrylic acid: purchased from Jiangsu Pulosi Biotechnology Co., Ltd.

[0033] Fatty alcohol polyoxyethylene ether O-20: purchased from Nantong Chenrun Chemical Co., Ltd.;

[0034] Coconut oil fatty acid diethanolamide: purchased from Guangzhou Yesheng Chemical Co., Ltd.;

[0035] Undecyl hydroxyethyl imidazoline quaternary ammonium salt: purchased from Qinhuangdao Yuexiang Technology Co., Ltd.;

[0036] Maleic anhydride-acrylic acid copolymer: purchased from Hubei Haili Environmental Protection Technology Co., Ltd.;

[0037] Other raw materials are all commercially available.

[0038] Preparation of anti-staining copolymer

[0039] S1-1. Mix undecyl hydroxyethyl imidazoline quaternary ammonium salt and water according to a mass ratio of 1:5, and stir and dissolve completely at 55 °C, then add 30 wt% sodium hydroxide aqueous solution to adjust the pH to 7.5 to obtain solution A;

[0040] S1-2. Stir and mix maleic anhydride and water at a mass-to-volume ratio of 0.6:1 g / mL to obtain solution B;

[0041] S1-3. Under the protection of an inert gas, heat solution A to 80 °C, and simultaneously dropwise add acrylic acid, solution B, and an aqueous solution of ammonium persulfate at 0.082 g / mL respectively. The dropping time is 2 h. After the dropping is completed, maintain the temperature at 80 °C and react for 2 h. The whole reaction process is carried out with stirring at 200 r / min. After the reaction is completed, cool to room temperature to obtain the anti-staining copolymer;

[0042] The molar ratio of the acrylic acid, maleic anhydride, and undecyl hydroxyethyl imidazoline quaternary ammonium salt is 1.6:1:0.6;

[0043] The dosage of the ammonium persulfate is 5 wt% of the sum of the masses of the acrylic acid, maleic anhydride, and undecyl hydroxyethyl imidazoline quaternary ammonium salt.

[0044] Preparation of the soaping agent

[0045] Preparation of Example 1

[0046] Accurately weigh according to the mass parts of each raw material in Table 1;

[0047] S2-1. Add the anti-staining copolymer, fatty alcohol polyoxyethylene ether O-20, and water to the reaction kettle, slowly heat to 40 °C, and stir for 1 hour to form a mixed solution and keep it warm for standby;

[0048] S2-2. Add coconut oil fatty acid diethanolamide to the above mixed solution, keep the temperature at 40 °C, and continue to stir for 2 hours to obtain soaping agent Example 1-3.

[0049] Table 1 Mass parts of raw materials for Examples 1-3

[0050] Raw materials Example 1 Example 2 Example 3 Anti-staining copolymer 10 15 20 Polyoxyethylene fatty alcohol ether O-20 10 13 15 Coconut oil fatty acid diethanolamide 5 7 10 Water Make up to 100 Make up to 100 Make up to 100

[0051] 2 Preparation of comparative examples

[0052] Comparative example 1: On the basis of the formulation of Example 2, replace the anti-staining copolymer with an equal mass part of maleic anhydride-acrylic acid copolymer, and the rest is the same as Example 2;

[0053] Comparative example 2: On the basis of the formulation of Example 2, replace the coconut oil fatty acid diethanolamide with an equal mass part of fatty alcohol polyoxyethylene ether O-20. The preparation method is to add the anti-staining copolymer, fatty alcohol polyoxyethylene ether O-20, and water to the reaction kettle, slowly heat to 40 °C, and stir for 3 hours to obtain Comparative example 2;

[0054] Comparative Example 3: On the basis of the formulation of Example 2, replace the fatty alcohol polyoxyethylene ether O-20 with an equal mass fraction of coconut oil fatty acid diethanolamide. The preparation method is to add the anti-staining copolymer, coconut oil fatty acid diethanolamide, and water into a reaction kettle, slowly heat up to 40 °C, and stir for 3 hours to obtain Comparative Example 3;

[0055] Comparative Example 4: On the basis of the formulation of Example 2, compound the fatty alcohol polyoxyethylene ether O-20 and coconut oil fatty acid diethanolamide according to a mass ratio of 7:13. The preparation method refers to Example, and Comparative Example 4 is obtained;

[0056] Comparative Example 5: On the basis of the formulation of Example 2, compound the fatty alcohol polyoxyethylene ether O-20 and coconut oil fatty acid diethanolamide according to a mass ratio of 18:2. The preparation method refers to Example, and Comparative Example 5 is obtained;

[0057] Precisely weigh according to the mass fractions of each raw material in Table 2.

[0058] Table 2 Mass fractions of soap detergent raw materials

[0059] Raw materials Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Anti-staining copolymer 15 - 15 15 15 15 Maleic anhydride-acrylic acid copolymer - 15 - - - - Polyoxyethylene fatty alcohol ether O-20 13 13 20 - 7 18 Coconut oil fatty acid diethanolamide 7 7 - 20 13 2 Water Make up to 100 Make up to 100 Make up to 100 Make up to 100 Make up to 100 Make up to 100

[0060] Note: "-" in the table indicates no addition.

[0061] Performance test

[0062] Put the wool fabric dyed with acid dye and the white wool fabric (staining sample) into the soap washing solution (mass concentration of soap detergent 8 g / L, bath ratio 1:30), and carry out soap washing at 75 °C for 20 min. After soap washing, wash the fabric sample with high-temperature water (80 °C, 10 min) and room-temperature water once each (bath ratio 1:30, time 10 min), dry it, and collect the soap washing residual liquid.

[0063] 1 Anti-staining performance test of soap detergent

[0064] Refer to GB / T 6151-2016 "General Principles for Tests of Colour Fastness to Textiles", fold the sample (staining sample) 2 times, and use a colorimetric and color matching instrument to measure the K / S value of the staining sample after soap washing and water washing under a D65 light source. Each sample is tested 4 times, and the average value is taken.

[0065] 2 Detergency performance test of soap detergent

[0066] Use an ultraviolet spectrophotometer to measure the absorbance of the soap washing residual liquid at the maximum absorption wavelength. The greater the absorbance, the stronger the detergency ability of the soap detergent, and vice versa.

[0067] 3 Colour fastness of fabric after soap washing with soap detergent

[0068] Tested in accordance with GB / T 3921-2008 "Textiles - Tests for colour fastness - Colour fastness to soaping" and GB / T 3920-2008 "Textiles - Tests for colour fastness - Colour fastness to rubbing".

[0069] Table 3 Soaping performance of the soaping agent

[0070]

[0071]

[0072] Result analysis:

[0073] The anti-staining property of the soaping agent is characterized by the K / S value. The lower the K / S value of the stained fabric, the better the anti-staining property, and vice versa. The absorbance A value of the residual liquid represents the content of dyes in the soaping residual liquid. The larger the absorbance A value of the residual liquid, the better the detergency ability of the soaping agent, and vice versa.

[0074] According to the test results in Table 3, for the stained fabrics of Examples 1-3 provided by the present invention, the K / S values are 0.5211 - 0.5347, and the absorbance of the soaping residual liquid is 0.4147 - 0.4322. The colour fastness to soaping of acid-dyed wool fabrics reaches above grade 4, and the colour fastness to dry and wet rubbing reaches above grade 4, having excellent anti-staining ability and detergency ability. The fabrics after soaping have good colour fastness and colour fastness to dry and wet rubbing.

[0075] According to the comparative test results, Example 2 is significantly superior to Comparative Example 1, proving that the anti-staining copolymer provided by the present invention has more excellent anti-staining performance and more excellent chelating performance compared with maleic anhydride - acrylic acid copolymer. Example 2 is significantly superior to Comparative Examples 2-5, proving the key role of fatty alcohol polyoxyethylene ether O-20 and coconut oil fatty acid diethanolamide in the overall formulation. The absence of any component or the mass ratio not being within the scope of the present application will affect the performance of the soaping agent.

[0076] Finally, it should be noted that the above examples and comparative examples are only used to illustrate the technical solutions of the present invention rather than to limit the protection scope of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A soaping agent, characterized in that The soaping agent comprises the following components in parts by mass: The preparation method of the anti-fouling copolymer comprises the following steps: S1-1. The undecyl hydroxyethyl imidazoline quaternary ammonium salt was mixed with water in a mass ratio of 1:5 and stirred at 55 °C to completely dissolve, and a 30wt% aqueous sodium hydroxide solution was added to adjust the pH to 7.5 ± 0.2 to obtain a solution A; S1-2. Maleic anhydride and water were stirred and mixed at a mass volume ratio of 0.6:1 g / mL to obtain solution B; S1-3. Under inert gas protection, solution A was heated to 60-80 ° C, and acrylic acid, solution B and 0.082 g / mL ammonium persulfate aqueous solution were added dropwise at the same time. The addition time was 2h. After the addition was completed, the temperature was maintained at 80 ° C for 2h. The reaction was stirred at 200 r / min throughout the reaction. After the reaction was completed, it was cooled to room temperature to obtain an anti-fouling copolymer; The molar ratio of acrylic acid, maleic anhydride and undecyl hydroxyethyl imidazoline quaternary ammonium salt is 1.6:1:(0.4-0.7); The amount of ammonium persulfate used is 3-6 wt % of the sum of the mass of acrylic acid, maleic anhydride and undecylhydroxyethylimidazoline quaternary ammonium salt.

2. The soaping agent according to claim 1, characterized in that The soaping agent comprises the following components in parts by mass:

3. The method for preparing a soaping agent according to claim 1 or 2, characterized in that: The preparation method comprises the following steps: S2-1 anti-fouling copolymer, fatty alcohol polyoxyethylene ether O-20, water were added to the reactor, slowly heated to 30-40 ℃, stirred for 0.5-1 hour to form a mixed solution and kept warm for standby; S2-2. Add coconut oil fatty acid diethanolamide to the mixed solution, maintain the temperature at 30-40°C, and continue stirring for 1-2 hours to obtain a soaping agent.

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