Refining agent composition as well as preparation method and application thereof

Abstract

The invention discloses a scouring agent composition as well as a preparation method and application thereof. The scouring agent composition disclosed by the invention is prepared from the following components in percentage by weight: 20 to 40 weight percent of cardiac phenol polyoxyethylene polyoxypropylene ether, 15 to 30 weight percent of isomeric alcohol block polyether, 18 to 32 weight percent of ternary copolymerized polycarboxylic acid chelating dispersant, 5 to 10 weight percent of anionic surfactant and 15 to 30 weight percent of water, wherein the total weight of the scouring agent composition is 100 weight percent. Compared with a conventional scouring agent composition, the scouring agent composition disclosed by the invention adopts a bio-based raw material, has strong biodegradability, strong wetting and emulsifying ability and strong dispersing and washing ability, and is particularly suitable for a cotton cheese scouring and bleaching one-bath process, the whiteness of the treated cheese is higher than that of the conventional scouring agent by 2% or above, and the whiteness of the treated cheese is higher than that of the conventional scouring agent when the scouring agent composition is used for the bleaching and whitening one-bath process. The whiteness is higher than that of a conventional scouring agent by 5% or above, and the bleaching whiteness layer difference of cheese can be effectively controlled. The scouring agent composition disclosed by the invention can achieve an extra-white effect.

Description

Technical Field

[0001] The invention relates to the technical field of printing and dyeing, and in particular to a special whitening scouring agent composition used for a one-bath process of scouring and bleaching pure cotton cheese yarn, and a preparation method and application thereof. Background Art

[0002] The scouring and bleaching of pure cotton textiles is generally achieved by using caustic soda and hydrogen peroxide at high temperature under the action of surfactants. Due to its special existence form, cheese yarn is very likely to cause uneven treatment of the inner and outer layers, so it has higher requirements for chemicals.

[0003] The obvious characteristic of cheese bleaching is that during the circulation of the working liquid in the cheese yarn, the yarn content per unit circumference is different, and the adsorption amount of the working liquid is also different, making it difficult to make the concentration of chemicals that the yarn contacts at the inside, middle and outside locations consistent, so the cheese yarn pre-treatment is prone to layer differences. In addition, because the cheese yarn is fine and tightly wound, in the pre-treatment, the cheese yarn is like a "filter". If the impurities treated are not effectively decomposed and dispersed, they will all be adsorbed in the yarn layer as the working liquid circulates. The adsorbed impurities will affect the contact between the chemicals in the working liquid and the yarn, thereby affecting the treatment effect and causing layer differences. Under normal circumstances, through the full effect of chemicals on textiles, the whiteness can be achieved to about 81%, which can meet most market needs. However, for special requirements of extreme whiteness, which we collectively call "extra whiteness", it is difficult to achieve, and the current level that can be achieved is about 83-85%. The special whitening scouring agent for conventional textiles is made of a compound of silicate substances and surfactants. It mainly uses silicate substances to absorb impurities removed from the fabric, so that the fabric can fully react with caustic soda and hydrogen peroxide to achieve a better whiteness. However, because the particles of silicate substances become larger after absorbing impurities, they cannot pass through the "filter" composed of yarns during the processing process and can only be adsorbed in the yarn layer, causing the yarn adsorbed with impurities to be unable to be bleached. Therefore, this type of scouring agent cannot be used for cheese yarn bleaching. There are also scouring agents with good penetration and emulsification, chelating dispersants with strong dispersing power, and oxygen bleaching stabilizers added during cheese yarn bleaching. In this way, the difference in cheese yarn bleaching whiteness can only be controlled at 4-5%. Some high-end fabrics need to obtain a more uniform, bright and gorgeous whiteness, and they also need to be whitened. Generally, the higher the bleaching whiteness, the higher the whitening whiteness. Moreover, the whitening treatment will increase the whiteness difference. The whitening treatment of cheese yarn will increase the layer difference from 4-5% after bleaching to 5-10%, resulting in the inner yarn being stripped and discarded due to low whiteness, which not only wastes resources but also increases the difficulty of processing. In addition, acrylic homopolymer or acrylic copolymer chelating dispersants with good chelating and dispersing power are not highly compatible with surfactants, making it difficult to prepare a high-content product in one dosage form.

[0004] The present invention prepares a scouring agent composition, the average whiteness can reach the special whiteness requirement of more than 85%, the scouring agent has good emulsification and penetration, excellent dispersing and washing performance, and is particularly suitable for special whitening treatment of cotton yarn, and can increase the bleaching whiteness by more than 2%, and the whiteness after whitening by more than 5%, and the bleaching whiteness difference is controlled to be less than 3%, and the whitening whiteness difference is controlled to be less than 5%. In addition, the scouring agent adopts bio-based raw materials such as cardol, itaconic acid, and caffeic acid, has strong degradability, and the synthetically prepared dispersant has high compatibility with surfactants, and can prepare high-content, composite multifunctional products. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a special white scouring agent composition and a preparation method thereof for a pure cotton cheese yarn scouring and bleaching one-bath process or a bleaching and whitening one-bath process. By using the composition in the cotton cheese yarn bleaching or whitening process, a cotton cheese yarn with uniform, thorough and high-quality whiteness and a small difference in whiteness between the inner, middle and outer layers can be obtained; the scouring agent is a composite type and is easy to use; it uses bio-based raw materials, does not contain restricted substances such as APEO and phosphorus, and is environmentally friendly.

[0006] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0007] One aspect of the present invention provides a scouring agent composition, which contains the following components based on the total weight of the scouring agent composition:

[0008] Cardol polyoxyethylene polyoxypropylene ether: 20-40wt%,

[0009] Isomeric alcohol block polyether: 15-30wt%,

[0010] Ternary copolymer polycarboxylic acid chelating dispersant: 18-32wt%,

[0011] Anionic surfactant: 5-10 wt%, and

[0012] Water: 15-30wt%.

[0013] Furthermore, the structural formula of the cardol polyoxyethylene polyoxypropylene ether is as follows:

[0014]

[0015] Wherein: n is an integer of 8-14, and m is an integer of 2-3.

[0016] Furthermore, the isomeric alcohol block polyether is an isomeric decanol block polyether, an isomeric dodecanol block polyether or an isomeric tridecanol block polyether, the block mode of the isomeric alcohol block polyether is normal block (that is, the EO segment is before the PO segment), and the EO number of the isomeric alcohol block polyether is 11-15, and the PO number is 3-4.

[0017] Furthermore, the structural formula of the ternary copolymerized polycarboxylic acid chelating dispersant is as follows:

[0018]

[0019] Wherein, a is an integer of 4-10, x:y:z=1:2.5-3:0.2, and x is an integer of 4-9.

[0020] Furthermore, the weight average molecular weight of the ternary copolymerized polycarboxylic acid chelating dispersant is 3000-5000.

[0021] Furthermore, the preparation method of the ternary copolymerized polycarboxylic acid chelating dispersant comprises the following steps:

[0022] (1) Itaconic acid esterification: In a four-necked flask equipped with a stirrer, a thermometer, and a reflux condenser, polyethylene glycol with a molecular weight of 200-400, 1.1 mol of itaconic acid per mol of polyethylene glycol, p-toluenesulfonic acid as a catalyst, and hydroquinone as a polymerization inhibitor were added. Nitrogen was passed through the flask at normal pressure, and the temperature was raised to 135-145° C. with stirring. The temperature was kept for reaction for 5-7 hours, and the mixture was cooled to room temperature to obtain colorless and transparent polyethylene glycol itaconic acid ester.

[0023] (2) Sulfate esterification of caffeic acid: Add caffeic acid and anhydrous ethanol to a four-necked flask equipped with a stirrer, a thermometer, and a constant pressure funnel, stir evenly until the caffeic acid is completely dissolved, maintain the temperature at 20-30° C., dropwise add an excess amount of chlorosulfonic acid relative to the molar number of caffeic acid to the caffeic acid ethanol solution, and control the dropwise addition time to 15-25 min. Absorb the tail gas with sodium hydroxide ethanol solution; after the dropwise addition is completed, continue the reaction for 70-90 min; remove the salt by suction filtration, and remove the ethanol by vacuum distillation to obtain yellow caffeic acid sulfate;

[0024] (3) Polymerization of acrylic acid, itaconate and caffeic acid sulfate: take polyethylene glycol itaconate, 0.2 mol of caffeic acid sulfate relative to 1 mol of polyethylene glycol itaconate and water, heat to 60-70°C and keep warm for 25-35 min until the raw materials are fully dissolved, add a portion of ammonium persulfate aqueous solution as an initiator, continue to heat to 80-90°C, add 2.5-3 mol of acrylic acid relative to 1 mol of polyethylene glycol itaconate and the remaining ammonium persulfate aqueous solution, the total amount of ammonium persulfate is 2% of the total weight of the monomers, and the addition is completed within 1 hour, and the reaction is kept warm for 4-6 hours to obtain a ternary copolymer polycarboxylic acid chelating dispersant.

[0025] The above steps may be specifically as follows, for example:

[0026] (1) Itaconic acid esterification: In a four-necked flask equipped with a stirrer, a thermometer, and a reflux condenser, add 1 mol of PEG (polyethylene glycol molecular weight 200-400), 1.1 mol of itaconic acid, 0.2% (relative to the weight of itaconic acid) of p-toluenesulfonic acid as a catalyst, and 0.2% (relative to the weight of itaconic acid) of hydroquinone as an inhibitor. Pass nitrogen gas at normal pressure, stir, heat to 140°C, keep the temperature for reaction for 6 hours, and cool to room temperature to obtain colorless and transparent itaconic acid polyethylene glycol ester.

[0027] (2) Sulfate esterification of caffeic acid: Add 0.3 mol of caffeic acid and 80 g of anhydrous ethanol to a four-necked flask equipped with a stirrer, a thermometer, and a constant pressure funnel, stir evenly until the caffeic acid is completely dissolved, maintain the temperature at 25°C, slowly drop 0.31 mol of chlorosulfonic acid into the caffeic acid ethanol solution, and control the dropwise addition time to about 20 min. Use sodium hydroxide ethanol solution to absorb the tail gas. After the dropwise addition is completed, continue the reaction for 80 min. Remove the salt by suction filtration, and remove the ethanol by vacuum distillation to obtain yellow caffeic acid sulfate.

[0028] (3) Polymerization of acrylic acid, itaconate, and caffeic acid ester: Take 0.2 mol of polyethylene glycol itaconate, 0.04 mol of caffeic acid sulfate and a certain amount of water, heat to 65°C and keep warm for 30 min until the raw materials are fully dissolved, add a portion of 20% ammonium persulfate aqueous solution as an initiator, continue to heat to 85°C, slowly add 0.5-0.6 mol of acrylic acid and the remaining ammonium persulfate (the total amount is 2% of the total weight of the monomer) aqueous solution, and add the entire amount within 1 hour. Keep warm for reaction for 5 hours to obtain a ternary copolymer polycarboxylic acid chelating dispersant.

[0029] Furthermore, the anionic surfactant is selected from one or more of disodium alcohol ether sulfosuccinate, alcohol ether carboxylates, fatty acid methyl ester sulfonates, and α-olefin sulfonates.

[0030] Another aspect of the present invention provides a method for preparing a scouring agent composition, which comprises the following steps:

[0031] (1) adding cardol polyoxyethylene polyoxypropylene ether, isomeric alcohol block polyether, anionic surfactant, ternary copolymer polycarboxylic acid chelating dispersant and water into a reaction kettle, and stirring at 40-50° C. for 15-30 minutes until the components are evenly mixed;

[0032] (2) Cooling to room temperature to obtain a scouring agent composition.

[0033] Another aspect of the present invention provides the use of the scouring agent composition in a one-bath scouring and bleaching process or a one-bath bleaching and whitening process for cotton cheese yarn.

[0034] Compared with the prior art, the present invention has the following advantages: (1) block polyether is used to improve the wetting, foaming and emulsifying properties of the scouring agent; (2) the raw materials used have strong washing power and calcium soap dispersing ability, and the polymer can decompose and disperse the impurities such as pulp and cottonseed hulls that have been processed to prevent the impurities from adhering to the yarn; (3) by modifying the chelating dispersant monomer, its water solubility and compatibility with surfactants are increased; (4) bio-based raw materials such as cardol, itaconic acid, caffeic acid, etc. are used, and it does not contain GOTS restricted substances such as APEO and phosphorus, and is environmentally friendly.

[0035] The special white scouring agent composition prepared by the present invention is a one-dose composite type and is easy to use. The composition has strong foaming power, high emulsifying power, and strong dispersing and washing ability. It is used in a cotton cone yarn scouring and bleaching one-bath process or a bleaching and whitening one-bath process to achieve uniform and thorough whiteness. After treatment, the whiteness difference between the inner, middle and outer layers of the yarn is small. It is particularly suitable for use in bleaching or whitening processes to make special white yarns, and the whiteness and layer difference are significantly better than conventional scouring agents. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a photograph showing the effect of scouring agents on calcium dispersibility.

[0037] Figure 2 This is a photograph showing the effect of scouring agents on iron dispersibility. DETAILED DESCRIPTION

[0038] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the present invention. It should be understood here that after reading the content taught by the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the appended claims of the application.

[0039] Example 1

[0040] Synthesis of ternary copolymer polycarboxylic acid chelating dispersant 1:

[0041] (1) Itaconic acid esterification: In a four-necked flask equipped with a stirrer, a thermometer, and a reflux condenser, 300 g (1 mol) of PEG300, 150.26 g (1.1 mol) of itaconic acid, 0.3 g of p-toluenesulfonic acid as a catalyst, and 0.3 g of hydroquinone as a polymerization inhibitor were added. Nitrogen was passed through the flask at normal pressure for protection. The temperature was raised to 140° C. with stirring. The reaction was kept at this temperature for 6 h. The flask was cooled to room temperature to obtain colorless and transparent itaconic acid polyethylene glycol ester 1.

[0042] (2) Sulfate esterification of caffeic acid: Add 54.05 g (0.3 mol) of caffeic acid and 80 g of anhydrous ethanol to a four-necked flask equipped with a stirrer, a thermometer, and a constant pressure funnel, stir evenly until the caffeic acid is completely dissolved, maintain the temperature at 25°C, slowly drop 36.12 g (0.31 mol) of chlorosulfonic acid into the caffeic acid ethanol solution, drop for 20 minutes, and absorb the tail gas with sodium hydroxide ethanol solution. After the dropwise addition is completed, continue the reaction for 80 minutes. Remove the salt by suction filtration, remove the ethanol by vacuum distillation, and obtain yellow caffeic acid sulfate.

[0043] (3) Polymerization of acrylic acid, itaconate, and caffeic acid sulfate: 82.53 g (0.2 mol) of itaconate polyethylene glycol ester 1, 10.61 g (0.04 mol) of caffeic acid sulfate and 200 g of water were taken, the temperature was raised to 65° C. and kept warm for 30 min until the raw materials were fully dissolved, 3 g of 20% aqueous solution of ammonium persulfate was added dropwise as an initiator, the temperature was continued to be raised to 85° C., 36.03 g (0.5 mol) of acrylic acid and the remaining 9.89 g of 20% aqueous solution of ammonium persulfate (the total amount of ammonium persulfate was 2.58 g) were slowly added dropwise, and the addition was completed within 1 hour. The reaction was kept warm for 5 hours to obtain a yellow ternary copolymer polycarboxylic acid chelating dispersant 1, and the weight average molecular weight was measured to be 3500.

[0044] Preparation of special white scouring agent 1: 20g of cardol polyoxyethylene polyoxypropylene ether (10EO, 3PO, purchased from Changshu Naisu), 25g of isomeric dodecanol block polyether (13EO, 3PO, purchased from Sasol Chemical), 8g of fatty acid methyl ester sulfonate MES (purchased from Hangzhou Kecheng), 25g of ternary copolymer polycarboxylic acid chelating dispersant 1 (weight average molecular weight of 3500) and 22g of water were added to a reactor, stirred at 45°C for 20min until the components were evenly mixed, cooled to room temperature, and a special white scouring agent 1 was obtained, with a measured solid content of 60.6%.

[0045] Example 2

[0046] Synthesis of ternary copolymer polycarboxylic acid chelating dispersant 2:

[0047] (1) Itaconic acid esterification: In a four-necked flask equipped with a stirrer, a thermometer, and a reflux condenser, 400 g (1 mol) of PEG400, 150.26 g of itaconic acid, 0.3 g of p-toluenesulfonic acid as a catalyst, and 0.3 g of hydroquinone as a polymerization inhibitor were added. Nitrogen was passed through the flask at normal pressure for protection. The temperature was raised to 140° C. with stirring. The reaction was kept at this temperature for 6 h. The mixture was cooled to room temperature to obtain colorless and transparent itaconic acid polyethylene glycol ester 2.

[0048] (2) Sulfate esterification of caffeic acid: Add 54.05 g of caffeic acid and 80 g of anhydrous ethanol to a four-necked flask equipped with a stirrer, a thermometer, and a constant pressure funnel, stir evenly until the caffeic acid is completely dissolved, maintain the temperature at 25°C, slowly drop 36.12 g of chlorosulfonic acid into the caffeic acid ethanol solution, drop for 20 minutes, and absorb the tail gas with sodium hydroxide ethanol solution. After the dropwise addition is completed, continue the reaction for 80 minutes. Remove the salt by suction filtration, and remove the ethanol by vacuum distillation to obtain yellow caffeic acid sulfate.

[0049] (3) Polymerization of acrylic acid, itaconate, and caffeic acid sulfate: 102.72 g (0.2 mol) of itaconate polyethylene glycol ester 2, 10.61 g of caffeic acid sulfate and 255 g of water were taken, the temperature was raised to 65° C. and kept warm for 30 min until the raw materials were fully dissolved, 7.6 g of 20% aqueous solution of ammonium persulfate was added dropwise as an initiator, the temperature was continued to be raised to 85° C., 43.24 g (0.6 mol) of acrylic acid and the remaining 8 g of 20% aqueous solution of ammonium persulfate (the total amount of ammonium persulfate was 3.12 g) were slowly added dropwise, and the addition was completed within 1 hour. The reaction was kept warm for 5 hours to obtain a ternary copolymer polycarboxylic acid chelating dispersant 2, and the weight average molecular weight was measured to be 4500.

[0050] Preparation of special white scouring agent 2: 30g of cardol polyoxyethylene polyoxypropylene ether (10EO, 2PO, purchased from Changshu Naisu), 15g of isomeric decanol block polyether (12EO, 3PO, purchased from Sasol Chemical), 10g of α-olefin sulfonate AOS (purchased from China Daily Chemical Research Institute), 18g of ternary copolymer polycarboxylic acid chelating dispersant 2 (weight average molecular weight of 4500) and 27g of water were added to a reactor, stirred at 50°C for 30min until the components were evenly mixed, cooled to room temperature, and a special white scouring agent 2 was obtained, with a measured solid content of 59.2%.

[0051] Example 3

[0052] Synthesis of ternary copolymer polycarboxylic acid chelating dispersant 3:

[0053] (1) Itaconic acid esterification: In a four-necked flask equipped with a stirrer, a thermometer, and a reflux condenser, 200 g (1 mol) of PEG200, 150.26 g of itaconic acid, 0.3 g of p-toluenesulfonic acid as a catalyst, and 0.3 g of hydroquinone as a polymerization inhibitor were added. Nitrogen was passed through the flask at normal pressure for protection. The temperature was raised to 140°C with stirring. The reaction was kept at this temperature for 6 h. The mixture was cooled to room temperature to obtain colorless and transparent itaconic acid polyethylene glycol ester 3.

[0054] (2) Sulfate esterification of caffeic acid: Add 54.05 g of caffeic acid and 80 g of anhydrous ethanol to a four-necked flask equipped with a stirrer, a thermometer, and a constant pressure funnel, stir evenly until the caffeic acid is completely dissolved, maintain the temperature at 25°C, slowly drop 36.12 g of chlorosulfonic acid into the caffeic acid ethanol solution, drop for 20 minutes, and absorb the tail gas with sodium hydroxide ethanol solution. After the dropwise addition is completed, continue the reaction for 80 minutes. Remove the salt by suction filtration, and remove the ethanol by vacuum distillation to obtain yellow caffeic acid sulfate.

[0055] (3) Polymerization of acrylic acid, itaconate, and caffeic acid sulfate: 93.83 g (0.2 mol) of itaconate polyethylene glycol ester 3, 10.61 g of caffeic acid sulfate and 238 g of water were taken, the temperature was raised to 65° C. and kept warm for 30 min until the raw materials were fully dissolved, 3 g of 20% aqueous solution of ammonium persulfate was added dropwise as an initiator, the temperature was continued to be raised to 85° C., 43.24 g of acrylic acid and 11.75 g of 20% aqueous solution of ammonium persulfate (the total amount of ammonium persulfate was 2.95 g) were slowly added dropwise, and the addition was completed within 1 hour. The reaction was kept warm for 5 hours to obtain a ternary copolymer polycarboxylic acid chelating dispersant 3, and the weight average molecular weight was measured to be 3000.

[0056] Preparation of special white scouring agent 3: 25g of cardol polyoxyethylene polyoxypropylene ether (8EO, 2PO, purchased from Changshu Naisu), 15g of isomeric tridecanol block polyether (15EO, 4PO, purchased from Sasol Chemical), 4g of AEO5 sulfosuccinic acid monoester disodium salt and 2g of alcohol ether carboxylate AEC9-H (all purchased from China Daily Chemical Research Institute), 28g of ternary copolymer polycarboxylic acid chelating dispersant 3 (weight average molecular weight of 3000) and 26g of water were added to a reactor, stirred at 40°C for 15min until the components were evenly mixed, cooled to room temperature, and a special white scouring agent 3 was obtained, with a measured solid content of 55.8%.

[0057] The application comparison is verified by the following experiments:

[0058] 1 Experimental content

[0059] 1.1 Textiles: Commercially available cotton yarn (32s single yarn)

[0060] 1.2 Dyes and chemicals: Commercially available special white scouring agent 1 (khaki viscous liquid, solid content 43.3%), commercially available conventional scouring agent 2 (colorless transparent liquid, solid content 60.2%), commercially available cheese scouring agent 3 (light yellow transparent liquid, solid content 52.2%), special white scouring agents 1-3 of the embodiments of the present invention, deoxygenase, brightener Yajiehui BHT-L, and Yagersu Reactive Red HE-7B were all purchased from Shanghai Yayun, and acetic acid, NaOH, H2O2 (27.5%), CaCl2, Na2CO3, FeCl3, and Na2SO4 were all purchased from Sinopharm Group.

[0061] 1.3 Application process:

[0062] Scouring bleaching one bath:

[0063] Formula: Scouring agent 2g / L, NaOH 2g / L, H2O2 (27.5%) 12g / L, bath ratio 1:10

[0064] Process: Heating from 40℃ to 98℃ (heating rate 3℃ / min) → keeping warm for 60min → washing with hot water at 80℃×10min → deoxygenation with deoxygenase at 60℃×10min → neutralization with acetic acid at 50℃×10min → washing with water and drying

[0065] Bleach and Whitening in One Bath:

[0066] Formula: Scouring agent 2g / L, NaOH 2g / L, H2O2 (27.5%) 15g / L, Yajiehui BHT-L 0.8g / L, bath ratio 1:10

[0067] Heating from 40℃ to 110℃ (heating rate 3℃ / min) → keeping warm for 50min → washing with hot water at 80℃×10min → deoxygenation with deoxygenase at 60℃×10min → neutralization with acetic acid at 50℃×10min → washing with water and drying

[0068] 2 Performance Test

[0069] 2.1 Determination of APEO and total phosphorus content in scouring agent

[0070] According to GB / T23972-2009 "Determination of Alkylphenol and Alkylphenol Polyoxyethylene Ether in Textile Dyeing and Finishing Auxiliary Agents by High Performance Liquid Chromatography / Mass Spectrometry", the APEO content in the auxiliaries is tested. Among them, NPEOs are nonylphenol polyoxyethylene ethers, and OPEOs are octylphenol polyoxyethylene ethers. The degradation products of this type of substances have estrogen-like activity on organisms, showing difficulty in degradation, strong bioaccumulation and toxicity. The lower the test value, the less harmful the scouring agent is to organisms.

[0071] The total phosphorus content in the scouring agent is determined according to GB / T 11893-1989 "Determination of total phosphorus in water quality - Ammonium molybdate spectrophotometry". The lower the test value, the less pollution the scouring agent causes to the water body.

[0072] 2.2 Chelating power test

[0073] Chelated calcium: Take a clean and transparent 150mL beaker, use a pipette to take 20mL of 2% sample aqueous solution into the beaker, add 80mL of distilled water, if the solution is acidic, use 10% NaOH solution to adjust the pH to between 6-7, then add 10mL of Na2CO3 solution to make the pH between 10-11, and titrate with 0.125mol / L CaCl2 standard solution until a clear blue light appears as the end point. During the titration process, the pH must be maintained between 10-11, and the volume V (mL) of the CaCl2 solution consumed is recorded.

[0074]

[0075] Chelated iron: Take a clean and transparent 250mL beaker, add 100mL distilled water, take 4mL of 2% sample solution into the beaker with a pipette, adjust the pH to between 10-11 with NaOH solution, and drop 0.125mol / LFeCl3 solution until the solution just precipitates, and set the number of milliliters of FeCl3 solution consumed as V (mL). During the process of dropping FeCl3, the pH will continue to drop, and 10% NaOH should be used to adjust the pH to keep it between 10-11.

[0076]

[0077] The higher the chelating force value, the stronger the chelating ability.

[0078] 2.3 Dispersion force test

[0079] Calcium dispersibility test: Measure 0.2mL of sample scouring agent, add 70mL of 1.1g / L CaCl2 solution, add 10mL of 1.3% Jagersul Reactive Red HE-7B, then add 6g of Na2SO4, treat in a rocking water bath at 60℃×30min, add 2g of Na2CO3, treat in a rocking water bath at 60℃×30min, and filter. The fewer white spots on the filter paper, the better the calcium dispersibility.

[0080] Iron dispersibility test: Measure 1 mL of sample chelating dispersant, add 60 mL of distilled water, add 40 mL of 2.0 g / L ferrous sulfate solution, and finally add 0.2 g of NaOH, treat in a rocking water bath at 95°C for 30 min, and filter. The less red precipitate on the filter paper, the better the iron dispersibility.

[0081] 2.4 Yarn whiteness, capillary effect and breaking strength

[0082] Sampling: The treated yarn is opened and 5 samples are taken from different positions from the outside to the inside, which are defined as open tube 1 to open tube 5 in sequence.

[0083] Whiteness: comb the yarns to make them smooth and even, fix them straight on A4 white paper, and test their CIE whiteness with Datacolor 650. Test them 4 times and take the average value. The higher the value, the better the whiteness; the smaller the difference between the maximum and minimum values, the smaller the layer difference.

[0084] Hair effect: The treated textiles are tested for hair effect according to FZ / T01071-2008 method. The higher the value, the better the hair effect.

[0085] Breaking strength: The yarn strength is measured according to GB / T3916-2013 "Determination of breaking strength and breaking elongation of single yarn in textile packaged yarn (CRE method)". The larger the value, the higher the yarn strength and the smaller the effect of bleaching on the yarn strength.

[0086] Table 1 APEO content and total phosphorus content of scouring agent

[0087]

[0088] Note: The detection limit of APEO content is 10mg / kg, and the detection limit of total phosphorus content is 0.002mg / L

[0089] It can be seen from the data in Table 1 that the scouring agent of the present invention does not contain APEO and phosphorus, and the wastewater discharged using the scouring agent will not cause eutrophication of the water body.

[0090] Table 2 Chelating power of scouring agent

[0091] Sample name <![CDATA[Chelated calcium (mg CaCO3 / g)]]> <![CDATA[Chelated iron (mg Fe 3+ / g)]]> Commercially available special white scouring agent 1 43.7 552.5 Commercially available conventional scouring agent 2 34.5 132.5 Commercial cheese scouring agent 3 81.2 612.5 Example 1 156.3 778.7 Example 2 126.3 715.0 Example 3 150.1 770.0

[0092] From the above data, it can be seen that the scouring agent of the present invention has excellent calcium chelating ability, which can block the appearance of calcium soap precipitation and prevent it from being adsorbed on the yarn to cause inner and outer layer differences. It also has outstanding iron chelating ability, which can effectively shield metal ions and make hydrogen peroxide decompose stably and effectively, thereby achieving excellent whiteness.

[0093] from Figure 1 From the photos of the effect of the scouring agent on calcium dispersion, it can be seen that the scouring agent of the present invention has a significantly better ability to disperse calcium than the commercial scouring agent, indicating that the scouring agent of the present invention has excellent ability to disperse and stabilize calcium carbonate, making it exist in the form of small particles, which are not easy to agglomerate and deposit on the yarn, making it easier for the bleaching liquid to fully interact with the yarn and achieve the best treatment effect. Figure 2 It can be seen from the photos of the effect of the scouring agent on the iron dispersibility that the scouring agent of the present invention has a significantly better ability to disperse iron than the commercial scouring agent. Figure 1 , Figure 2 From the photos showing the dispersibility of calcium carbonate and ferric hydroxide, it can be found that the scouring agent of the present invention has excellent dispersibility for particles and flocs in the solution, making it difficult for them to agglomerate and adhere to the yarn surface, thereby achieving a higher treatment whiteness.

[0094] Table 3 Scouring agent scouring bleaching one bath process effect

[0095]

[0096]

[0097] Table 4 Scouring agent bleaching whitening one bath process effect

[0098]

[0099]

[0100] From the test data of yarn whiteness and breaking strength after treatment with the above scouring and bleaching one-bath process and the bleaching and whitening one-bath process, it can be seen that the scouring agent of the present invention can obtain better whiteness and lower layer difference than the market scouring agent while ensuring strength. When used for the cotton package yarn scouring and bleaching one-bath process, the whiteness of the package yarn after treatment is more than 2% higher than that of the conventional scouring agent, and when used for the bleaching and whitening one-bath process, the whiteness of the package yarn after treatment is more than 5% higher than that of the conventional scouring agent. It is particularly suitable for textiles that need to be whitened, and the obtained yarn has more uniform whiteness and higher quality.

[0101] In summary, the scouring agent of the present invention has excellent chelating power for calcium and iron and dispersibility for impurities, the composite product is easy to use, and the bio-based raw materials are environmentally friendly. It is used for cheese bleaching or bleaching and whitening in one bath process. Compared with conventional scouring agents and cheese scouring agents on the market, the treated textiles have high whiteness and small layer difference, which improves the quality of textiles and production efficiency.

[0102] Although the present invention has been disclosed as above by way of embodiments, it is not intended to limit the protection scope of the present invention. Any changes and modifications made by any technician familiar with the technology without departing from the concept and scope of the present invention should fall within the protection scope of the present invention.

Claims

1. A scouring agent composition, comprising the following components based on the total weight of the scouring agent as 100wt%: Cardol polyoxyethylene polyoxypropylene ether: 20-40wt%, Isomeric alcohol block polyether: 15-30wt%, Ternary copolymer polycarboxylic acid chelating dispersant: 18-32wt%, Anionic surfactant: 5-10 wt%, and Water: 15-30wt%.

2. The scouring agent composition according to claim 1, characterized in that The structural formula of the cardol polyoxyethylene polyoxypropylene ether is as follows: Wherein: n is an integer of 8-14, and m is an integer of 2-3.

3. The scouring agent composition according to claim 1, characterized in that The isomeric alcohol block polyether is an isomeric decanol block polyether, an isomeric dodecanol block polyether or an isomeric tridecanol block polyether, and the blocking mode of the isomeric alcohol block polyether is normal blocking.

4. The scouring agent composition according to claim 3, characterized in that The EO number of the isomeric alcohol block polyether is 11-15, and the PO number is 3-4.

5. The scouring agent composition according to claim 1, characterized in that The structural formula of the ternary copolymerized polycarboxylic acid chelating dispersant is as follows: Wherein, a is an integer of 4-10, x:y:z=1:2.5-3:0.2, and x is an integer of 4-9.

6. The scouring agent composition according to claim 5, characterized in that The weight average molecular weight of the ternary copolymerized polycarboxylic acid chelating dispersant is 3000-5000.

7. The scouring agent composition according to claim 5, characterized in that The preparation method of the ternary copolymerized polycarboxylic acid chelating dispersant comprises the following steps: Itaconic acid esterification: add polyethylene glycol with a molecular weight of 200-400, 1.1 moles of itaconic acid relative to 1 mole of polyethylene glycol, p-toluenesulfonic acid as a catalyst, and hydroquinone as an inhibitor to a four-necked flask equipped with a stirrer, a thermometer, and a reflux condenser, pass nitrogen gas at normal pressure, stir and heat to 135-145°C, keep the temperature for reaction for 5-7h, and cool to room temperature to obtain colorless and transparent itaconic acid polyethylene glycol ester; Sulfate esterification of caffeic acid: add caffeic acid and anhydrous ethanol to a four-necked flask equipped with a stirrer, a thermometer, and a constant pressure funnel, stir evenly until the caffeic acid is completely dissolved, maintain the temperature at 20-30°C, dropwise add an excess amount of chlorosulfonic acid relative to the molar number of caffeic acid to the caffeic acid ethanol solution, control the dropwise addition time to 15-25min, and absorb the tail gas with sodium hydroxide ethanol solution; after the dropwise addition is completed, continue the reaction for 70-90min; remove the salt by suction filtration, and remove the ethanol by reduced pressure distillation to obtain yellow caffeic acid sulfate; Polymerization of acrylic acid, itaconate and caffeic acid sulfate: take polyethylene glycol itaconate, 0.2 moles of caffeic acid sulfate relative to 1 mole of polyethylene glycol itaconate and water, heat to 60-70°C and keep warm for 25-35 minutes until the raw materials are fully dissolved, add part of the ammonium persulfate aqueous solution as an initiator, continue to heat to 80-90°C, add 2.5-3 moles of acrylic acid relative to 1 mole of polyethylene glycol itaconate and the remaining ammonium persulfate aqueous solution, the total amount of ammonium persulfate is 2% of the total mass of the monomers, and the addition is completed within 1 hour, and the reaction is kept warm for 4-6 hours to obtain a ternary copolymer polycarboxylic acid chelating dispersant.

8. The scouring agent composition according to claim 1, characterized in that The anionic surfactant is selected from one or more of disodium alcohol ether sulfosuccinate, alcohol ether carboxylates, fatty acid methyl ester sulfonates, and α-olefin sulfonates.

9. The method for preparing the scouring agent composition according to any one of claims 1 to 8, comprising the following steps: Add cardol polyoxyethylene polyoxypropylene ether, isomeric alcohol block polyether, anionic surfactant, ternary copolymer polycarboxylic acid chelating dispersant and water into a reaction kettle, and stir at 40-50° C. for 15-30 minutes until all components are evenly mixed; The mixture was cooled to room temperature to obtain a scouring agent composition.

10. Use of the scouring agent composition according to any one of claims 1 to 8 in a one-bath scouring and bleaching process or a one-bath bleaching and whitening process for cotton cheese yarn.

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