A soaping agent and a method for preparing the same

Abstract

The application 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 contains 10-20 parts of anti-staining copolymer, 10-15 parts of fatty alcohol polyoxyethylene ether O-20, 5-10 parts of coconut oil fatty acid diethanol amide and the rest water, with the total mass of the soaping agent being 100 parts. The anti-staining copolymer is prepared 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 application has excellent anti-staining ability and cleaning ability, and the fabric after soaping by the soaping agent has good color fastness and dry and wet rubbing fastness.

Description

Technical Field

[0001] This invention belongs to the field of textile printing and dyeing auxiliaries technology, specifically relating to a soaping agent and its preparation method. Background Technology

[0002] Acid dyes, as an important choice for dyeing protein fibers such as silk, wool, and nylon, have always faced technical challenges in the industry due to issues such as color bleeding and staining during the dyeing process. Color bleeding not only affects the color fastness and vibrancy of the product, but may also re-stain the fabric during washing, especially light-colored or white areas, leading to a decline in product quality.

[0003] While existing soap-based detergents on the market can remove surface dye to some extent, they still have shortcomings in terms of anti-staining effect, temperature limitations, and environmental performance. Some soap-based detergents, although able to remove surface dye, are not ideal in preventing staining, resulting in fabrics still showing staining after washing. Summary of the Invention

[0004] To address the shortcomings of existing technologies, the present invention aims to provide a soap-washing agent with anti-staining properties and high color fastness, as well as its preparation method. This soap-washing agent, through a specific formulation and preparation process, achieves efficient removal of floating color and excellent anti-staining effects.

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

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

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

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

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

[0010] Add water to make 100 servings.

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

[0012] S1-1. Mix undecylhydroxyethylimidazoline quaternary ammonium salt with water at a mass ratio of 1:5, stir at 55°C until completely dissolved, add 30wt% sodium hydroxide aqueous solution to adjust the pH to 7.5±0.2, and obtain solution A;

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

[0014] S1-3. Under inert gas protection, solution A is heated to 60-80℃, and acrylic acid, solution B and 0.082 g / mL ammonium persulfate aqueous solution are added dropwise simultaneously over a period of 2 hours. After the addition is completed, the temperature is maintained at 80℃ for 2 hours. The reaction is carried out by stirring at 200 r / min throughout the reaction. After the reaction is completed, the mixture is cooled to room temperature to obtain the anti-fouling copolymer.

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

[0016] The amount of ammonium persulfate used is 3-6 wt% of the sum of the masses of acrylic acid, maleic anhydride, and undecylhydroxyethylimidazoline quaternary ammonium salt.

[0017] Preferably, the soaping agent comprises the following components in parts by weight:

[0018]

[0019] Secondly, the present invention provides a method for preparing the aforementioned soap detergent, the method comprising the following steps:

[0020] S2-1. Add the anti-fouling copolymer, fatty alcohol polyoxyethylene ether O-20, and water to the reactor, slowly heat to 30-40℃, stir for 0.5-1 hour to form a mixed solution and keep it warm for later use;

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

[0022] In this invention:

[0023] The anti-fouling copolymer obtained by copolymerizing acrylic acid, maleic anhydride, and undecylhydroxyethyl imidazoline quaternary ammonium salt mainly plays a chelating and dispersing role in soaping agents, thereby improving the soaping effect. This anti-fouling copolymer can effectively chelate Ca in water. 2+ Plasma keeps reactive dyes water-soluble, allowing them to form aggregates with the dyes. This stabilizes the floating dye in the washing solution, preventing it from re-dyeing the fibers and significantly improving the soaping effect on dyed fabrics, including removing floating dye and preventing staining. Especially in the soaping of printed fabrics, it can thoroughly clean residual printing paste.

[0024] Fatty alcohol polyoxyethylene ether O-20, with its emulsifying, dispersing, cleaning, and wetting properties, can emulsify and disperse grease, wax, and other dirt in soaping agents, making them soluble in water for easy removal; it can penetrate deep into the fabric fibers to wash away attached dirt and loose dye, wetting the fabric surface for subsequent washing and rinsing; at the same time, it has an affinity for dyes and can be used as a leveling agent and brightening agent to enhance the color brightness and uniformity of fabrics.

[0025] In soaping agents, coconut oil fatty acid diethanolamide mainly exhibits functions such as foaming and stabilizing, thickening and emulsifying, and penetrating and removing dirt. It can increase the richness and stability of foam, making cleaning more thorough. As a thickener and emulsifier, it improves the viscosity stability of soaping agents, making it easier to adhere to fabrics and emulsify grease and dirt. It also has a certain penetrating and removing ability, which can penetrate deep into the fibers to remove deep dirt and loose dye.

[0026] The beneficial effects of this invention are:

[0027] The soaping agent provided by this invention has excellent anti-staining and cleaning abilities, and the fabrics washed with soap have good color fastness and dry and wet rubbing color fastness. Detailed Implementation

[0028] To better illustrate the objectives, technical solutions, and advantages of this invention, the invention will be further described below with reference to specific embodiments. Those skilled in the art should understand that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0029] Unless otherwise specified, the experimental methods used in the specific embodiments are all conventional methods; the materials and reagents used are all commercially available unless otherwise specified; and the percentages mentioned in the specific embodiments are all mass percentages unless otherwise specified.

[0030] In this invention:

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

[0032] Acrylic acid: purchased from Jiangsu Puleisheng 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 Yehusheng Chemical Co., Ltd.;

[0035] Undecylhydroxyethylimidazoline 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] All other raw materials are commercially available.

[0038] Preparation of antifouling copolymers

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

[0040] S1-2. 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 inert gas protection, solution A was heated to 80°C, and acrylic acid, solution B and 0.082 g / mL ammonium persulfate aqueous solution were added dropwise simultaneously over a period of 2 hours. After the addition was completed, the temperature was maintained at 80°C for 2 hours. The reaction was carried out by stirring at 200 r / min throughout the reaction. After the reaction was completed, the mixture was cooled to room temperature to obtain the anti-fouling copolymer.

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

[0043] The amount of ammonium persulfate used is 5 wt% of the sum of the masses of acrylic acid, maleic anhydride, and undecylhydroxyethylimidazoline quaternary ammonium salt.

[0044] Preparation of soap detergent

[0045] Preparation of Example 1

[0046] Weigh each raw material precisely according to the mass fractions in Table 1;

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

[0048] S2-2. Add coconut oil fatty acid diethanolamide to the above mixed solution, maintain the temperature at 40°C, and continue stirring for 2 hours to obtain soap detergent Examples 1-3.

[0049] Table 1. Raw material mass parts for Examples 1-3

[0050] raw material Example 1 Example 2 Example 3 Anti-fouling copolymer 10 15 20 Fatty alcohol polyoxyethylene ether O-20 10 13 15 Coconut oil fatty acid diethanolamide 5 7 10 water Add to 100 Add to 100 Add to 100

[0051] 2. Preparation of comparative examples

[0052] Comparative Example 1: Based on the formulation of Example 2, the anti-fouling copolymer was replaced with an equal mass of maleic anhydride-acrylic acid copolymer, and the rest was the same as in Example 2;

[0053] Comparative Example 2: Based on the formulation of Example 2, coconut oil fatty acid diethanolamide was replaced with an equal mass of fatty alcohol polyoxyethylene ether O-20. The preparation method was to add anti-fouling copolymer, fatty alcohol polyoxyethylene ether O-20 and water to a reaction vessel, slowly heat to 40°C, and stir for 3 hours to obtain Comparative Example 2.

[0054] Comparative Example 3: Based on the formulation of Example 2, fatty alcohol polyoxyethylene ether O-20 was replaced with an equal mass of coconut oil fatty acid diethanolamide. The preparation method was to add the anti-fouling copolymer, coconut oil fatty acid diethanolamide, and water to the reaction vessel, slowly heat to 40°C, and stir for 3 hours to obtain Comparative Example 3.

[0055] Comparative Example 4: Based on the formulation of Example 2, fatty alcohol polyoxyethylene ether O-20 and coconut oil fatty acid diethanolamide were compounded at a mass ratio of 7:13. The preparation method was the same as in the Example 2, and Comparative Example 4 was obtained.

[0056] Comparative Example 5: Based on the formulation of Example 2, fatty alcohol polyoxyethylene ether O-20 and coconut oil fatty acid diethanolamide were compounded at a mass ratio of 18:2. The preparation method was the same as in the Example 2, and Comparative Example 5 was obtained.

[0057] Specifically, weigh each raw material precisely according to the mass fractions in Table 2.

[0058] Table 2. Mass parts of raw materials for soap detergent

[0059] raw material Example 2 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Comparative Example 5 Anti-fouling copolymer 15 - 15 15 15 15 Maleic anhydride-acrylic acid copolymer - 15 - - - - Fatty alcohol polyoxyethylene ether O-20 13 13 20 - 7 18 Coconut oil fatty acid diethanolamide 7 7 - 20 13 2 water Add to 100 Add to 100 Add to 100 Add to 100 Add to 100 Add to 100

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

[0061] Performance testing

[0062] Acid-dyed wool fabrics and white wool fabrics (stained samples) were placed in a soaping solution (soaping agent concentration 8 g / L, liquor ratio 1:30) and soaped at 75°C for 20 min. After soaping, the fabric samples were washed once with hot water (80°C, 10 min) and once with room temperature water (liquor ratio 1:30, time 10 min), dried, and the residual soaping solution was collected.

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

[0064] Referring to GB / T 6151-2016 "General Rules for Tests of Color Fastness to Textiles", the samples (stained samples) were folded twice, and the K / S values ​​of the stained samples after soaping and water washing were tested using a colorimeter under a D65 light source. Each sample was tested 4 times, and the average value was taken.

[0065] 2. Soap detergent cleaning performance test

[0066] The absorbance of the soap residue at the maximum absorption wavelength was measured using an ultraviolet spectrophotometer. The higher the absorbance, the stronger the cleaning ability of the soap, and vice versa.

[0067] 3. Color fastness of fabrics after soap washing

[0068] Tested according to GB / T 3921-2008 "Textiles - Tests for color fastness to washing" and GB / T3920-2008 "Textiles - Tests for color fastness to rubbing".

[0069] Table 3. Soaping performance of soaping agents

[0070]

[0071]

[0072] Results analysis:

[0073] The K / S value is used to characterize the anti-staining property of soaping agents. 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 characterizes the dye content in the soaping residue. The higher the absorbance A value of the residual liquid, the better the cleaning ability of the soaping agent, and vice versa.

[0074] According to the test results in Table 3, the K / S value of the dyed fabrics in Examples 1-3 provided by the present invention is 0.5211-0.5347, the absorbance of the soaping residue is 0.4147-0.4322, the color fastness to soaping of the acid-dyed wool fabric is above grade 4, and the color fastness to dry and wet rubbing is above grade 4. It has excellent anti-staining ability and cleaning ability. The fabric after soaping has good color fastness and dry and wet rubbing color fastness.

[0075] According to the comparative test results, Example 2 is significantly better than Comparative Example 1, proving that the anti-staining copolymer provided by the present invention has better anti-staining properties and better chelating properties than maleic anhydride-acrylic acid copolymer. Example 2 is significantly better than 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 outside the scope of this application will affect the performance of the soap detergent.

[0076] Finally, it should be noted that the above embodiments and comparative examples are only used to illustrate the technical solutions of the present invention and not to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A soap-based detergent, characterized in that, The soaping agent, by weight, comprises the following components: 15 parts of anti-fouling copolymer; Fatty alcohol polyoxyethylene ether O-20, 13 parts; 7 parts of coconut oil fatty acid diethanolamide; 65 parts water; The method for preparing the anti-fouling copolymer includes the following steps: S1-1. Mix undecylhydroxyethylimidazoline quaternary ammonium salt with water at a mass ratio of 1:5, stir at 55°C until completely dissolved, add 30wt% sodium hydroxide aqueous solution to adjust the pH to 7.5±0.2, and obtain solution A; S1-2. Mix maleic anhydride and water at a mass-to-volume ratio of 0.6:1 g / mL to obtain solution B; S1-3. Under inert gas protection, solution A is heated to 60-80℃, and acrylic acid, solution B and 0.082 g / mL ammonium persulfate aqueous solution are added dropwise simultaneously over a period of 2 hours. After the addition is completed, the temperature is maintained at 80℃ for 2 hours. The reaction is carried out by stirring at 200 r / min throughout the reaction. After the reaction is completed, the mixture is cooled to room temperature to obtain the anti-fouling copolymer. The molar ratio of acrylic acid, maleic anhydride, and undecylhydroxyethylimidazoline 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 masses of acrylic acid, maleic anhydride, and undecylhydroxyethylimidazoline quaternary ammonium salt.

2. The method for preparing the soap detergent according to claim 1, characterized in that, The preparation method includes the following steps: S2-1. Add the anti-fouling copolymer, fatty alcohol polyoxyethylene ether O-20, and water to the reactor, slowly heat to 30-40℃, stir for 0.5-1 hour to form a mixed solution and keep it warm for later use; S2-2. Add coconut oil fatty acid diethanolamide to the mixed solution, maintain the temperature at 30-40℃, and continue stirring for 1-2 hours to obtain the soap detergent.

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