A scouring agent composition, its preparation and use

Abstract

The application discloses a scouring agent composition and a preparation method and application thereof. The scouring agent composition comprises, based on the total weight, 5-15 wt% of rosin-based multi-branched block polyether, 2-6 wt% of polyether modified siloxane, 10-25 wt% of cashew phenol block polyether, 2-10 wt% of polycarboxylic acid chelating dispersant and the balance of water. The scouring agent composition has good wettability, emulsifiability and dispersibility, and is especially suitable for a low-temperature continuous process. The scouring agent composition has low foam, is especially suitable for a high-speed continuous process above 100 m / min, and can further improve production efficiency. In addition, the scouring agent composition adopts bio-based raw materials such as rosin acid and cashew phenol, is easy to degrade, does not contain APEO and phosphorus, and conforms to the sustainable development concept.

Description

Technical Field

[0001] This invention relates to textile auxiliaries, and more particularly to an environmentally friendly low-temperature scouring agent composition, its preparation method, and its application. Specifically, it relates to an environmentally friendly low-temperature scouring agent composition for use in a low-temperature continuous pretreatment process of polyester-cotton woven fabrics, its preparation method, and its application. Background Technology

[0002] In addition to impurities such as sizing agents, oils, and stains introduced during the spinning process, natural fibers also contain lignin, waxes, and pigments introduced during growth. The presence of these impurities hinders the smooth progress of dyeing and finishing processes and affects the fabric's performance, such as its appearance and comfort. Therefore, pretreatment is essential. Textile pretreatment includes scouring and bleaching, which remove impurities through chemical and physical-mechanical processes, resulting in whiter, softer textiles with good permeability, and providing qualified semi-finished products for subsequent dyeing and printing.

[0003] Traditional continuous pretreatment of polyester-cotton woven fabrics requires steaming at 100-102℃, resulting in significant steam consumption. Current continuous pretreatment processes for polyester-cotton woven fabrics utilize scouring agents prepared from organophosphorus chelating agents and high-efficiency surfactants, which can reduce the processing temperature from 100-102℃ to 80-85℃, lowering energy consumption and reducing carbon emissions to some extent. However, the processing temperature remains relatively high, and organophosphorus chelating agents can easily cause eutrophication of water bodies. Furthermore, these scouring agents have poor versatility, only suitable for twill fabrics with low sizing, coarse yarn count, and loose weave. For poplin fabrics with high sizing and tight weave, the pretreatment is incomplete, with a capillary effect of only 2-3 cm, far short of the target of over 8 cm for qualified semi-finished products. Moreover, to further reduce energy consumption and improve production efficiency, most dyeing and printing plants have increased their machine speeds from 60 m / min to 100-120 m / min, or even 160 m / min. At such high speeds, existing scouring agents struggle to penetrate the fibers. At low temperatures, the scouring agents and alkalis cannot fully act on the fibers and impurities, significantly reducing the removal of cottonseed hulls, cotton wax, lignin, sizing agents in cotton fibers, and oils in polyester. While increasing the amount of scouring agent can appropriately improve the capillary effect, it still doesn't meet the standards for subsequent dyeing of semi-finished textile products. Furthermore, increasing the amount of scouring agent not only increases raw material costs but also increases the COD value of wastewater, further complicating wastewater treatment. Of course, some technicians might naively assume that using substances with lower surface tension can easily solve all these problems, such as low-surface-tension fluorocarbon surfactants. These surfactants are often used in emulsion products for waterproofing and oil-repellent fabrics. However, aside from their strong hydrophobicity and high price, these surfactants are clearly unsuitable for the water-based and highly alkaline conditions of pretreatment, as they are prone to emulsion demulsification. Therefore, the current low-temperature continuous pretreatment process for polyester-cotton woven fabrics is limited to 80-85℃, and the treatment stability is poor for textiles of different specifications. Summary of the Invention

[0004] The purpose of this invention is to provide an environmentally friendly low-temperature scouring agent composition. This scouring agent composition has low foaming, excellent wetting, emulsifying, and dispersing properties, and is especially suitable for low-temperature, high-speed, and continuous pretreatment processes for polyester-cotton woven fabrics. It can reduce the processing temperature from 100℃ to 50-60℃, greatly reducing energy consumption in production and processing. For textiles of different specifications, it can maintain good processing stability without increasing the amount of scouring agent. Moreover, this scouring agent is prepared from surfactants modified from natural raw materials such as rosin base and cashew phenol, which are easily degradable and environmentally friendly.

[0005] One aspect of the present invention provides a refining agent composition, characterized in that, based on total weight, it comprises: 5-15 wt% rosin-based branched block polyether, 2-6 wt% polyether-modified siloxane, 10-25 wt% cashew phenol block polyether, 2-10 wt% polycarboxylic acid chelating dispersant, and the balance being water.

[0006] Another aspect of the present invention provides a method for preparing a refining agent composition, characterized by comprising the following steps:

[0007] (1) Add water, polycarboxylic acid chelating dispersant, cashew phenol block polyether, polyether modified siloxane and rosin-based multibranched block polyether, accounting for 30-50 wt% of the refining agent composition, to the reaction vessel and stir at 60-80℃ for 20-60 minutes until the mixture is uniform.

[0008] (2) Add the remaining water to the mixture formed in step (1) to cool it down, and continue stirring and cooling to room temperature to obtain the low-temperature refining agent composition.

[0009] Another aspect of the invention provides the application of this scouring agent composition in a low-temperature continuous pretreatment process for polyester-cotton woven fabrics.

[0010] Compared with existing technologies, the environmentally friendly low-temperature scouring agent composition of this invention has low surface tension, making it easy to penetrate into the fiber and contact with impurities. Through wetting and emulsification, these impurities are removed from the fiber. The raw materials used in this invention are mostly PO-terminated, exhibiting strong penetration, low foaming, and rapid defoaming, making them particularly suitable for low-temperature, high-speed continuous processes. Furthermore, the raw materials have large molecular weights and strong dispersing power, which can disperse the impurities removed during scouring in the working solution, preventing them from easily adhering back to the fabric surface. The scouring agent composition of this invention uses bio-based raw materials, is easily degradable, and, because it does not contain APEO (alkylphenol polyoxyethylene ether compounds) and phosphorus, or other substances harmful to the environment and human health, it aligns with the concept of sustainable development.

[0011] The environmentally friendly low-temperature scouring agent prepared by this invention possesses low foaming, high wetting power, high emulsifying power, and high dispersing power. It can emulsify and remove oils from polyester and impurities from cotton fibers at low temperatures of 50-60℃. It is suitable for high-speed continuous pretreatment processes of polyester-cotton blended woven fabrics of various specifications under low-temperature conditions, with processing speeds of, for example, 100 meters / minute or higher, and further up to 120-160 meters / minute, unaffected by foaming. The treated textiles exhibit excellent whiteness, wicking effect, strength, and other properties. Furthermore, the preparation method of this environmentally friendly low-temperature scouring agent is simple and easy to operate. Detailed Implementation

[0012] The environmentally friendly low-temperature refining agent of the present invention comprises, by total weight: 5-15 wt% rosin-based multibranched block polyether, 2-6 wt% polyether-modified siloxane, 10-25 wt% cashew phenol block polyether, 2-10 wt% polycarboxylic acid chelating dispersant, and the balance being water.

[0013] Preferably, the environmentally friendly low-temperature refining agent of the present invention comprises, by total weight: 6-10 wt% rosin-based multibranched block polyether, 2-5 wt% polyether-modified siloxane, 15-25 wt% cashew phenol block polyether, 3-8 wt% polycarboxylic acid chelating dispersant, and the balance being water.

[0014] In a preferred embodiment, the rosin-based multibranched block polyether has the following structural formula:

[0015]

[0016] In the formula, A is a is an integer from 4 to 10, b is an integer from 1 to 3, and n is an integer from 3 to 6.

[0017] In a preferred embodiment, the rosin-based branched block polyether has a molecular weight of 4200-18000 and an EO:PO ratio of 6:1-3:1.

[0018] The preparation method of the rosin-based multibranched block polyether is as follows:

[0019] a) Take 0.4 mol of trimethyl maleic anhydride in ethanol and add it to a round-bottom flask. Add excess polyamine dropwise over 20 min using a constant pressure funnel. The molar ratio of trimethyl maleic anhydride to polyamine is 1:3.6. Maintain the reaction at 70 °C for 8 hours to obtain maleic anhydride amide.

[0020] b) Add 0.2 mol of maleic rosinamide from a) to a high-pressure reactor, stir and heat to 120°C to melt, add 0.06 mol of potassium hydroxide catalyst, evacuate for 0.5 h to remove trace amounts of water and low-boiling-point substances, replace the residual air in the reactor with nitrogen, control the reaction temperature at 135-145°C and the pressure at 0.3-0.4 MPa, continuously and stably add 13-50 mol of ethylene oxide, age and absorb to negative pressure, then continuously and stably add 3-15 mol of propylene oxide at 0.3-0.4 MPa, maintain the reaction temperature at 145-155°C, age and absorb, cool to obtain maleic rosin-based branched block polyether.

[0021] In a preferred embodiment, the polyether-modified siloxane has the following structural formula:

[0022]

[0023] In the formula, m and n are each integers from 1 to 5; x is an integer from 3 to 8; y is an integer from 0 to 3; and R is H or a straight-chain alkyl group of C1-C3.

[0024] In a preferred embodiment, the cashew phenol block polyether is one or more of PO-terminated EO / PO polyethers, wherein the number of EOs is 5-12 and the number of POs is 1-3.

[0025] In a preferred embodiment, the polycarboxylic acid chelating dispersant is one or more selected from sodium polyoxysuccinate, polyacrylate, maleic acid-acrylic acid copolymer, and acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer.

[0026] In a preferred embodiment, the molecular weight of the polycarboxylic acid chelating dispersant is 800-8000.

[0027] The method for preparing the refining agent composition includes the following steps:

[0028] (1) Add water, polycarboxylic acid chelating dispersant, cashew phenol block polyether, polyether modified siloxane and rosin-based multibranched block polyether, accounting for 30-50 wt% of the refining agent composition, to the reaction vessel and stir at 60-80℃ for 20-60 minutes until the mixture is uniform.

[0029] (2) Add the remaining water to the mixture formed in step (1) to cool it down, and continue stirring and cooling to room temperature to obtain the refining agent composition.

[0030] The scouring agent composition of the present invention is suitable for use in low-temperature continuous pretreatment processes for polyester-cotton woven fabrics, and is particularly suitable for high-speed, low-temperature continuous pretreatment processes with processing speeds of 100 m / min or higher, and further up to 120-160 m / min, and processing temperatures of 50-60°C.

[0031] In this invention, polyester-cotton woven fabrics include, for example, CVC fabrics with a higher cotton content than polyester, such as CVC 65 / 35, in which the cotton content is 65% and the polyester content is 35%. Or T / C fabrics with a higher polyester content than cotton, such as T / C 80 / 20, in which the polyester content is 80% and the cotton content is 20%. Different specifications of fabrics will have different styles such as poplin and twill, and all of the above categories fall within the scope of polyester-cotton woven fabrics of this invention.

[0032] The refining agent prepared by this invention has good storage stability and does not separate under low temperature (0℃) and high temperature (40-50℃) conditions. It has low foaming, high wetting power, high emulsifying power and high dispersing power. When applied to high-speed (processing speed of more than 100 m / min) low temperature (50-60℃) continuous pretreatment processes, it can obtain excellent whiteness and capillary effect, improve production efficiency and reduce production defects.

[0033] Example

[0034] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the invention. It should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined by the appended claims.

[0035] Unless otherwise specified, % refers to weight%.

[0036] The application performance of the environmentally friendly low-temperature refining agent composition of the present invention was verified by the following experiments.

[0037] 1. Experiment Content

[0038] 1.1 Textiles: CVC 65 / 35 (polyester-cotton poplin fabric), T / C 80 / 20 (polyester-cotton twill fabric)

[0039] 1.2 Refining Agents: Commercially available product P, commercially available product L, and the refining agent of this invention.

[0040] 1.3 Application Process:

[0041] Pretreatment formula:

[0042]

[0043] Process: Pre-treatment working solution before immersion and rolling (two dips and two rolls, 100% roll residue) → Steaming at 50-60℃ for 60 minutes → Four-compartment hot water wash (95℃×30s, 95℃×30s, 80℃×30s, 80℃×30s) → Washing, dehydration, and drying.

[0044] 2 Performance Testing

[0045] 2.1 Determination of APEO and Total Phosphorus Content in Refining Agents

[0046] According to GB / T23972-2009 "Determination of Alkylphenols and Alkylphenol Polyoxyethylene Ethers in Textile Dyeing and Finishing Auxiliaries - High Performance Liquid Chromatography / Mass Spectrometry", the APEO content in scouring agents was tested. NPEOs are nonylphenol polyoxyethylene ethers, and OPEOs are octylphenol polyoxyethylene ethers. The degradation products of these substances have estrogen-like activity in organisms, exhibiting poor degradation, strong bioaccumulation, and toxicity. Lower values ​​indicate less harm to organisms from the scouring agent.

[0047] The total phosphorus content in refining agents was determined according to GB / T 11893-1989 "Determination of Total Phosphorus in Water - Ammonium Molybdate Spectrophotometric Method". The lower the test value, the less pollution the refining agent causes to the water body.

[0048] 2.2 Refining agent foaming and penetration tests

[0049] The foaming performance of a 1 g / L sample solution under different temperature conditions (30℃ / 60℃) was tested using a Roche foaming apparatus. The foam height after the flow stopped and after 5 minutes were recorded. The smaller the data, the lower the foaming property of the refining agent, which is more beneficial to production and processing.

[0050] The canvas settling method (30℃) was used. The time from when a standard canvas disc was placed in a 2g / L sample solution until it began to settle was taken as the permeation time (s). The shorter the time, the better the permeability.

[0051] 2.3 Fabric whiteness, wicking effect, and strength tests

[0052] The treated textile was folded into four layers and its CIE whiteness was tested using Datacolor 650. The higher the value, the better the whiteness.

[0053] The treated textiles were tested for capillary effect according to the method of FZ / T01071-2008. The higher the value, the better the capillary effect.

[0054] The fabric strength was determined according to GB / T3923.1-2013 "Textiles - Tensile Properties of Fabrics - Part 1: Determination of Breaking Strength and Elongation at Break - Strip Method". The higher the test value, the less damage the pretreatment caused to the fabric strength.

[0055] Preparation Example 1 – Rosin-based branched block polyether 1:

[0056] a) Take 183g of trimethyl maleic acid (approximately 0.4mol, purchased from the Chinese Academy of Forestry) in ethanol solution and add it to a round-bottom flask. Add excess 210g of triethylenetetramine dropwise over 20min using a constant pressure funnel. The molar ratio of trimethyl maleic acid to polyamine is approximately 1:3.6. Maintain the reaction temperature at 70℃ for 8 hours to obtain maleic acid amide.

[0057] b) Add 180g of maleic amylopectin amide (approximately 0.2mol) from a) to a high-pressure reactor, stir and heat to 120℃ to melt, add 3.36g of potassium hydroxide (approximately 0.06mol) catalyst, evacuate for 0.5h to remove trace amounts of water and low-boiling-point substances, replace the residual air in the reactor with nitrogen, control the reaction temperature at 135-145℃ and the pressure at 0.3-0.4MPa, continuously and stably add 810g of ethylene oxide (approximately 18.4mol), age and absorb to negative pressure, then continuously and stably add 180g of propylene oxide (approximately 3.1mol) at 0.3-0.4MPa, maintain the reaction temperature at 145-155℃, age and absorb, cool to obtain rosin-based branched block polyether 1 (EO number:PO number ≈ 6:1, molecular weight approximately 5600).

[0058] Preparation Example 2 – Rosin-based branched block polyether 2:

[0059] a) Take 183g of trimethyl maleic anhydride (approximately 0.4mol, purchased from the Chinese Academy of Forestry) in ethanol solution and add it to a round-bottom flask. Add 400g of excess hexanediol heptamethine dropwise over 20min using a constant pressure funnel. The molar ratio of trimethyl maleic anhydride to polyamine is approximately 1:3.6. Maintain the reaction temperature at 70℃ for 8 hours to obtain maleic anhydride amide.

[0060] b) Add 245g of maleic acridinium amide (approximately 0.2mol) from a) to a high-pressure reactor, stir and heat to 120℃ to melt, add 3.36g of potassium hydroxide (approximately 0.06mol) catalyst, evacuate for 0.5h to remove trace amounts of water and low-boiling-point substances, replace the residual air in the reactor with nitrogen, control the reaction temperature at 135-145℃ and the pressure at 0.3-0.4MPa, continuously and stably add 1800g of ethylene oxide (approximately 40.9mol), age and absorb to negative pressure, then continuously and stably add 580g of propylene oxide (approximately 10mol) at 0.3-0.4MPa, maintain the reaction temperature at 145-155℃, age and absorb, cool to obtain rosin-based branched block polyether 2 (EO number:PO number ≈ 4:1, molecular weight approximately 12000).

[0061] Preparation Example 3 – Rosin-based multibranched block polyether 3:

[0062] a) Take 183g of trimethyl maleic acid (approximately 0.4mol, purchased from the Chinese Academy of Forestry) in ethanol solution and add it to a round-bottom flask. Add excess 280g of tetraethylenepentamine dropwise over 20min using a constant pressure funnel. The molar ratio of trimethyl maleic acid to polyamine is approximately 1:3.6. Maintain the reaction temperature at 70℃ for 8 hours to obtain maleic acid amide.

[0063] b) Add 192g of maleic acridinium amide (approximately 0.2mol) from a) to a high-pressure reactor, stir and heat to 120℃ to melt, add 3.36g of potassium hydroxide (approximately 0.06mol) catalyst, evacuate for 0.5h to remove trace amounts of water and low-boiling-point substances, replace the residual air in the reactor with nitrogen, control the reaction temperature at 135-145℃ and the pressure at 0.3-0.4MPa, continuously and stably add 1600g of ethylene oxide (approximately 36.4mol), age and absorb to negative pressure, then continuously and stably add 425g of propylene oxide (approximately 7.3mol) at 0.3-0.4MPa, maintain the reaction temperature at 145-155℃, age and absorb, cool to obtain rosin-based branched block polyether 3 (EO number:PO number ≈ 5:1, molecular weight approximately 11000).

[0064] Example 1

[0065] 80g of water, 20g of rosin-based branched block polyether, 4g of polyether-modified siloxane Greesol H51 (m and n are both 2, x is 5, y is 1, R is H, purchased from Yueyang Kaimen Waterborne Additives Co., Ltd.), 40g of cashew phenol block polyether NSS 7S (EO number 7, PO number 1, purchased from Changshu Naisu Biomaterials Technology Co., Ltd.), 6g of acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer (molecular weight approximately 2800) and 4g of polyacrylate TH-1100 (molecular weight approximately 1100) (all purchased from Shandong Taihe Technology Co., Ltd.) were added to a 500mL three-necked flask. The mixture was heated in a water bath to 65℃ and stirred for 30 minutes until the solution was homogeneous. The water bath was removed, and 46g of residual water was added to cool the mixture. The mixture was stirred and cooled to room temperature. The product was then discharged, filtered, and a pale yellow transparent liquid was obtained.

[0066] Example 2

[0067] 90g of water, 16g of rosin-based branched block polyether, 8g of polyether-modified siloxane Greesol H62 (m=3, n=4, x=6, y=2, R=methyl, purchased from Yueyang Kaimen Waterborne Additives Co., Ltd.), 30g of cashew nut phenol block polyether NSS210C (EO number=10, PO number=2, purchased from Changshu Naisu Biomaterials Technology Co., Ltd.), and 16g of maleic acid-acrylic acid copolymer DB-50S (molecular weight approximately 7500, purchased from Zhangjiagang Debao Chemical Co., Ltd.) were added to a 500mL three-necked flask. The mixture was heated in a water bath to 75℃ and stirred for 50 minutes until the solution was homogeneous. The water bath was removed, and 40g of the remaining water was added to cool the mixture. The mixture was stirred and cooled to room temperature. The product was then discharged and filtered to obtain an amber-colored transparent liquid.

[0068] Example 3

[0069] 63g of water, 12g of rosin-based branched block polyether, 3g of polyether-modified siloxane Greesol H83 (m=2, n=3, x=8, y=3, R=propyl, purchased from Yueyang Kaimen Waterborne Additives Co., Ltd.), 50g of cashew phenol block polyether NSS1305B (EO=8, PO=2, purchased from Changshu Naisu Biomaterials Technology Co., Ltd.), and 6g of sodium polyepoxysuccinate (molecular weight approximately 1200, purchased from Shandong Taihe Technology Co., Ltd.) were added to a 500mL three-necked flask. The mixture was heated in a water bath to 70℃ and stirred for 60 minutes until the solution was homogeneous. The water bath was removed, and 60g of the remaining water was added to cool the mixture. The mixture was stirred and cooled to room temperature. The product was then discharged, filtered, and an amber-colored liquid was obtained.

[0070] Table 1 Comparison of APEO content and total phosphorus content between the refining agent of this invention and commercially available products.

[0071]

[0072] Note: The detection limit for APEO is 10 mg / kg, and the detection limit for total phosphorus is 0.002 mg / L.

[0073] As shown in Table 1, the refining agent of this invention is free of phosphorus and APEO, and is more environmentally friendly than commercially available product L.

[0074] Table 2 Comparison of basic performance of the refining agent of this invention with commercially available products

[0075]

[0076] Note: The numbers in parentheses indicate the time it takes for the foam to completely dissipate.

[0077] As shown in Table 2, at 60℃, the foam height of Example 1 at the point of flow interruption was 1.7cm, and the foam completely disappeared after 19s, with a foam height of 0cm. In contrast, the foam height of commercially available product P at the point of flow interruption was 7.5cm, and even after 300s, the foam height remained as high as 3.2cm. The lower foam height of Example 1 at the point of flow interruption indicates that the foaming property of Example 1 is lower than that of commercially available product P. The lower foam height of Example 1 after 300s indicates that the defoaming property of Example 1 is faster than that of commercially available product P. Therefore, the data in Table 2 clearly show that the foaming property of the scouring agent of this invention at 30℃ and 60℃ is lower than that of commercially available products P and L, and the defoaming property is faster at 60℃. The penetrability of the scouring agent of this invention is significantly better than that of commercially available products P and L. Such excellent penetrability and low-foaming performance make it suitable for high-speed continuous processing. Low foaming allows for accurate control of the feed amount according to the scale, and rapid penetration results in a high liquid carry-over rate after the fabric quickly passes through the scouring trough, leading to stable fabric quality after treatment.

[0078] Table 3 Comparison of refining performance between the refining agent of this invention and commercially available products

[0079]

[0080] As shown in Table 3, when textiles of different specifications are treated with the same continuous pretreatment process, the whiteness and wicking effect of the scouring agent of the present invention are significantly better than those of commercially available products P and L, indicating that the scouring agent of the present invention has good emulsifying, washing and dispersing properties; the strength of the treated fabric is slightly better than that of commercially available products P and L, indicating that the scouring agent of the present invention causes less damage to the strength.

[0081] Therefore, the scouring agent of this invention has excellent low-foaming, high-penetration, high-dispersion, and environmentally friendly properties. When applied to the low-temperature continuous pretreatment process of polyester-cotton woven fabrics, the processed textiles have higher whiteness, wicking effect, and strength than similar products on the market and meet the requirements of subsequent dyeing, showing excellent market prospects.

Claims

1. A refining agent composition, characterized in that, Based on total weight, the composition includes: 5-15 wt% rosin-based branched block polyether, 2-6 wt% polyether-modified siloxane, 10-25 wt% cashew phenol block polyether, 2-10 wt% polycarboxylic acid chelating dispersant, and the balance being water. The structural formula of the rosin-based multibranched block polyether is as follows: In the formula, A is a is an integer from 4 to 10, b is an integer from 1 to 3, and n is an integer from 3 to 6. The rosin-based branched block polyether has a molecular weight of 4200-18000 and an EO:PO ratio of 6:1-3:

1. The structural formula of the polyether-modified siloxane is as follows: In the formula, m and n are each integers from 1 to 5; x is an integer from 3 to 8; y is an integer from 1 to 3; R is H or a C1-C3 straight-chain alkyl group. The cashew phenol block polyether is one or more of PO-terminated EO / PO block polyethers, wherein the number of EOs is 5-12 and the number of POs is 1-3.

2. The refining agent composition according to claim 1, characterized in that, Based on total weight, it includes: 6-10 wt% rosin-based branched block polyether, 2-5 wt% polyether-modified siloxane, 15-25 wt% cashew phenol block polyether, 3-8 wt% polycarboxylic acid chelating dispersant, and the balance being water.

3. The refining agent composition according to claim 1, characterized in that, The polycarboxylic acid chelating dispersant is selected from one or more of sodium polyoxysuccinate, polyacrylate, maleic acid-acrylic acid copolymer, and acrylic acid-2-acrylamide-2-methylpropanesulfonic acid copolymer.

4. The refining agent composition according to claim 3, characterized in that, The molecular weight of the polycarboxylic acid chelating dispersant is 800-8000.

5. A method for preparing the refining agent composition according to any one of claims 1-4, characterized in that, Includes the following steps: (1) Add water, polycarboxylic acid chelating dispersant, cashew phenol block polyether, polyether modified siloxane and rosin-based multibranched block polyether, accounting for 30-50 wt% of the refining agent composition to the reaction vessel, and stir at 60-80℃ for 20-60 minutes until the mixture is uniform; (2) Add the remaining water to the mixture formed in step (1) to cool it down, continue stirring and cooling to room temperature to obtain the refining agent composition.

6. The use of the scouring agent composition according to any one of claims 1-4 in a low-temperature continuous pretreatment process for polyester-cotton woven fabrics.

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