Hydrophilic soil-release finishing agent and preparation method thereof

Abstract

The invention discloses a hydrophilic soil-release finishing agent and a preparation method thereof. The preparation method comprises the following steps: (1) weighing 30-50% by mass of a hydrophilic polymer dispersion liquid, 5-10% by mass of a nonionic surfactant, 0.5-2% by mass of a pH regulator and the balance of deionized water; (2) adding the hydrophilic polymer dispersion liquid and deionized water into a reaction container, stirring, heating to 60-80 DEG C, and keeping for 30-60 minutes until a uniform dispersion system is formed; (3) reducing the temperature of the system to 40-60 DEG C, adding a nonionic surfactant, and stirring until the turbidity of the system is stable; (4) under the stirring condition of 100-200 rpm, adjusting the pH value of the system to 5.0 + / -1.0; and (5) cooling the system to 20-25 DEG C, filtering through a 50-100-mesh filter screen, and degassing for 15-20 minutes at the vacuum degree of-0.06 to-0.08 MPa to obtain the hydrophilic soil-release finishing agent dispersion liquid. The finishing agent provided by the invention forms a continuous hydrophilic film on the surface of the fabric, and the oily stain removal rate is greatly improved compared with the traditional technology.

Description

Technical Field

[0001] The present invention relates to the technical field of finishing agents, in particular to a hydrophilic and easy-to-decontamination finishing agent and a preparation method thereof. Background Art

[0002] In the field of textile dyeing and finishing, the application of fabric easy-to-clean finishing agents has become relatively common, but the existing technology still has the following significant defects: Insufficient stain removal efficiency: Most finishing agents have limited anti-adhesion capabilities for oily stains such as chili oil and olive oil. Cleaning requires a large amount of detergent, and the removal effect on stubborn stains such as oily pen marks and plant juices is poor.

[0003] Washing resistance defects: After repeated washing, the hydrophilicity and stain removal function of conventional finishing agents are significantly reduced.

[0004] Performance contradiction: Although some finishing agents have the ability to easily remove stains, the fabric feels stiff after treatment or there is a risk of color change, which limits the application scenarios.

[0005] Environmental risks: Finishing agents containing fluorine and APEO (alkylphenol polyoxyethylene ether) do not meet environmental protection standards and are difficult to meet the needs of high-end textiles.

[0006] In view of the above technical problems, the present application proposes a finishing agent and a preparation method thereof that has the characteristics of high-efficiency decontamination, water-resistant, optimized hand feel and environmental protection. Summary of the Invention

[0007] In view of the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a hydrophilic and easy-to-clean finishing agent and a preparation method thereof, aiming to solve the technical problems of low cleaning efficiency, poor washability, poor hand feel and insufficient environmental protection of the finishing agents in the prior art.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions: A method for preparing a hydrophilic and easy-to-decontamination finishing agent comprises the following steps: (1) Raw material preparation: Weigh 30% to 50% of a hydrophilic polymer dispersion, 5% to 10% of a nonionic surfactant, and 0.5% to 2% of a pH regulator by mass percentage, with the remainder being deionized water; the polymer in the hydrophilic polymer dispersion is a polyether-polyester block copolymer with a number average molecular weight of 10,000 to 30,000 g / mol, and the molecular chain contains hydroxyl groups and ether bond hydrophilic groups; the nonionic surfactant is a fatty alcohol polyoxyethylene ether; (2) Mixing and dispersion: Add the hydrophilic polymer dispersion and deionized water into the reaction vessel, stir at a rate of 200-400 rpm, and heat to 60-80 °C and maintain for 30-60 minutes until a uniform dispersion system is formed; (3) Surface active agent compounding: reduce the temperature of the system to 40~60℃, add non-ionic surface active agent, maintain 300~500rpm stirring rate for 15~30 minutes, until the system turbidity is stable; (4) pH value adjustment: under the stirring condition of 100~200rpm, use pH adjuster to adjust the pH value of the system to 5.0±1.0, and the adjustment time is not more than 10 minutes; (5) Post-treatment: cool the system to 20~25℃, filter through a 50~100 mesh filter, and then degas under a vacuum degree of -0.06 to -0.08 MPa for 15~20 minutes, to obtain the hydrophilic easy-to-clean finishing agent dispersion.

[0009] Further, in the preparation method of the hydrophilic easy-to-clean finishing agent, the deionized water is sterilized at 121℃ for 30 minutes before use.

[0010] Further, in the preparation method of the hydrophilic easy-to-clean finishing agent, the polyether-polyester block copolymer is prepared by ester exchange reaction, and the polyether segment accounts for 40~60 mol%.

[0011] Further, in the preparation method of the hydrophilic easy-to-clean finishing agent, the fatty alcohol polyoxyethylene ether has an oxyethylene group addition number of 5~15.

[0012] Further, in the preparation method of the hydrophilic easy-to-clean finishing agent, the reaction container is a stainless steel reaction kettle with a temperature control device, and the temperature control accuracy is ±2℃.

[0013] Further, in the preparation method of the hydrophilic easy-to-clean finishing agent, in step (2), the system heating rate is controlled to be 2~5℃ / min.

[0014] Further, in the preparation method of the hydrophilic easy-to-clean finishing agent, in step (5), after filtration, the particle size distribution D50 of the finishing agent dispersion is 0.1~1μm.

[0015] The application correspondingly provides a hydrophilic easy-to-clean finishing agent, which is prepared by the above-mentioned preparation method.

[0016] Advantages: the application provides a hydrophilic easy-to-clean finishing agent and a preparation method thereof, which has at least the following advantages compared with the prior art: (1) The hydroxyl and ether bond hydrophilic groups in the polyether-polyester block copolymer and the 40-60 mol% polyether segment account for a continuous hydrophilic film on the surface of the fabric, and the oil stain (such as chili oil) removal rate can reach 99% (Example 3), which is 9%~19% higher than that of traditional finishing agents.

[0017] (2) Control the particle size distribution D50 in 0.1~1μm, the film layer is combined closely with the fiber, and the performance attenuation problem after multiple water washing in the prior art is solved.

[0018] (3) The flexibility of the polyether-polyester block copolymer and reasonable process parameters (such as 70℃ mixing dispersion, 300rpm stirring) make the stiffness of the finished fabric low to 2.7cm (Example 3), which is better than that of the commercial product (such as fluorine-containing finishing agent with stiffness of 3.8cm), and the stiff hand problem is avoided.

[0019] (4) The raw materials and process steps used meet the environmental protection requirements, do not contain harmful chemical substances, meet the current environmental protection trend, and increase the market competitiveness of the product. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 Comparison chart of real objects in pepper oil removal test. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and effect of the present application more clear and definite, the present application is further described in detail below. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0022] A preparation method of a hydrophilic easy-to-clean finishing agent, characterized in that it comprises the following steps: (1) Raw material preparation: 30%~50% of hydrophilic polymer dispersion, 5%~10% of non-ionic surfactant, 0.5%~2% of pH regulator, and the balance of deionized water are weighed according to the mass percentage; the polymer in the hydrophilic polymer dispersion is a polyether-polyester block copolymer with a number average molecular weight of 10000~30000g / mol, and contains hydroxyl and ether bond hydrophilic groups in the molecular chain; the non-ionic surfactant is a fatty alcohol polyoxyethylene ether; and the pH regulator is preferably citric acid or ammonia; (2) Mixing and dispersion: the hydrophilic polymer dispersion and deionized water are added to a reaction container, stirred at a speed of 200~400rpm, heated to 60~80℃ and kept for 30~60 minutes, until a uniform dispersion system is formed; (3) Surfactant compounding: the temperature of the system is reduced to 40~60℃, the non-ionic surfactant is added, and the stirring speed is maintained at 300~500rpm for 15~30 minutes, until the turbidity of the system is stable; (4) pH value adjustment: under the stirring condition of 100~200rpm, the pH value of the system is adjusted to 5.0±1.0 using the pH regulator, and the adjustment time is not more than 10 minutes.

[0023] (5) Post-treatment: cool the system to 20~25℃, filter through a 50~100 mesh filter, then degas under a vacuum of -0.06 to -0.08 MPa for 15~20 minutes to produce a hydrophilic easy-to-clean finishing agent dispersion.

[0024] In the technical solution, the polyether-polyester block copolymer, as a hydrophilic polymer, has a number average molecular weight of 10000-30000 g / mol and contains hydroxyl groups and ether bond hydrophilic groups in the molecular chain, which makes the polymer have good hydrophilicity and certain flexibility, and can provide the finishing agent with hydrophilic easy-to-clean properties. The content of 30%~50% is reasonable, which can ensure that the finishing agent has enough hydrophilic components and does not affect the dispersion and subsequent processing performance.

[0025] The fatty alcohol polyoxyethylene ether is selected as a non-ionic surfactant, which has good wetting, dispersing and emulsifying properties. The content of 5%~10% can effectively reduce the surface tension of the finishing agent system, enhance its wetting and penetration ability on the substrate such as fabric, and help to improve the stain removal effect.

[0026] Citric acid or ammonia is used as a pH regulator to adjust the pH value of the system as needed, so that the finishing agent can work in the appropriate pH range, ensuring the stability of the finishing agent and the compatibility with the substrate.

[0027] Stir at a rate of 200~400 rpm while heating to 60~80℃ and maintaining for 30~60 minutes. Such stirring rate and temperature conditions can promote the dispersion of the polymer in water, allowing the polymer molecular chain to fully stretch and form a uniform dispersion system, laying a foundation for subsequent compounding and stabilizing the performance of the finishing agent.

[0028] Reduce the system temperature to 40~60℃, add non-ionic surfactant, and maintain a stirring rate of 300~500 rpm for 15~30 minutes. This temperature range and stirring rate is conducive to the uniform dispersion of the surfactant and its interaction with the polymer, allowing the surfactant to fully exert its wetting, dispersing and emulsifying properties, while avoiding the adverse effects of high temperature on the performance of the surfactant.

[0029] Under the condition of 100~200 rpm stirring, use the pH regulator to adjust the pH value of the system to 5.0±1.0. This stirring rate can ensure uniform distribution of the pH regulator, allowing the pH value of the system to quickly and uniformly reach the target range. A pH value of 5.0±1.0 is relatively mild, and has good compatibility with most substrates such as fabric, while also being beneficial to the stability and use effect of the finishing agent. The adjustment time should not exceed 10 minutes, which can avoid the adverse effects of long-term pH adjustment on the stability of the system, ensuring the efficiency and quality of the entire preparation process.

[0030] Cool the system to 20-25℃, filter through a 50-100 mesh filter, which can remove impurities and large particles in the system that are not uniformly dispersed, ensuring the purity and stability of the finishing agent dispersion, preventing problems such as clogging of the nozzle, uneven coating, etc. in subsequent applications. Degassing at a vacuum of -0.06 to -0.08 MPa for 15-20 minutes can remove bubbles in the system, improve the appearance quality and performance of the finishing agent, and prevent bubbles from affecting the uniformity and stability of the finishing agent and defects caused by bubbles during application.

[0031] Further, the deionized water is sterilized at 121℃ for 30 minutes. The significance of this setting is that (1) high-temperature sterilization can effectively kill bacteria, fungi and other microorganisms in the deionized water, ensuring that the finishing agent is not contaminated by microorganisms during preparation, thereby ensuring product quality and safety. By sterilizing the deionized water, the damage to the finishing agent components by microorganisms can be reduced, improving the stability of the finishing agent.

[0032] Further, the polyether-polyester block copolymer is prepared by ester exchange reaction, wherein the polyether segment accounts for 40-60 mol%. When the polyether segment accounts for more than 40 mol%, the hydrophilic film formed by the copolymer on the fabric surface can quickly absorb water, making it easier for oily stains (such as chili oil, olive oil) to be washed away by water. If the polyether segment accounts for more than 60 mol%, the copolymer may be excessively swollen in water, reducing its adhesion to fabric fibers and affecting wash resistance (the hydrophilic film is easily detached after multiple washes).

[0033] Further, the fatty alcohol polyoxyethylene ether has an oxyethylene group addition number of 5-15. When the addition number is 5-15, the surfactant molecules can be wrapped on the surface of the polymer particles, reducing the electrostatic repulsion between particles and stabilizing the particle size distribution D50 of the finishing agent dispersion at 0.1-1 μm. In addition, when the oxyethylene group addition number is 5-15, the melting point of the fatty alcohol polyoxyethylene ether is relatively low (usually <60℃), and it is in a liquid state at the compounding temperature (40-60℃) of step (3), making it easy to mix uniformly with the hydrophilic polymer dispersion, avoiding decomposition of the surfactant due to high temperature (e.g. products with an addition number greater than 15 have a melting point >70℃, and are still in a solid state at 60℃, requiring additional heating and stirring, increasing energy consumption).

[0034] Further, the reaction container is a stainless steel reaction kettle with temperature control device, and the temperature control accuracy is ±2℃. In the mixing and dispersing stage of step (2), the temperature is raised to 60-80℃ to make the hydrophilic polymer dispersion liquid uniformly dissolved. If the temperature control accuracy is insufficient (such as ±5℃), the temperature fluctuation will cause the polymer molecular chain to stretch insufficiently, forming local agglomeration, so that the particle size D50 of the dispersion liquid exceeds the target range of 0.1-1μm (such as when the temperature fluctuates to 85℃, the polymer may partially degrade due to high temperature, and the particle size increases to 1.2μm).

[0035] Further, in step (2), the system temperature rising rate is controlled to be 2-5℃ / min. The dispersion of the hydrophilic polymer dispersion liquid (polyether-polyester block copolymer) in water needs to be gradually raised in temperature to promote the stretching of the molecular chain. If the temperature rising rate is too fast (such as more than 5℃ / min), the local temperature of the system may instantaneously exceed 80℃, causing the polymer molecular chain to intertwine with each other due to intense thermal motion, forming agglomerates with particle size >1μm, and finally making the particle size distribution D50 of the finishing agent dispersion liquid exceed the target range of 0.1-1μm (such as when the temperature rising rate is 8℃ / min, the D50 can reach 1.2μm).

[0036] Further, in step (5), after filtration, the particle size distribution D50 of the finishing agent dispersion liquid is 0.1-1μm. When the particle size D50 is 0.1-1μm, the polymer particles in the dispersion liquid can form a continuous and dense hydrophilic film on the surface of the fabric. If the particle size is too large (>1μm), the gap between the particles increases, and the film layer has pores, causing oily stains (such as chili oil) to easily penetrate into the fabric fibers; if the particle size is too small (<0.1μm), the particles are easy to agglomerate to form micelles, which in turn reduces the uniformity of the film layer.

[0037] The present application provides a kind of hydrophilic easy-to-clean finishing agent, which is prepared by the above-mentioned method.

[0038] For the convenience of understanding, the following examples are further described.

[0039] Example 1 Raw material ratio (mass percentage) Hydrophilic polymer dispersion liquid (polyether segment 40mol%): 30%; Fatty alcohol polyoxyethylene ether (oxyethylene group addition number 5): 5%; Citric acid: 0.5%; Deionized water: 64.5%; Preparation process parameters Mixing and dispersing: 200rpm stirring, 60℃ incubation for 60 minutes, temperature rising rate 2℃ / min; Compounding temperature: 40℃, 300rpm stirring for 15 minutes; pH adjustment: 5.0 (adjustment time 10 minutes); Post-treatment: 50 mesh filtration, degassing at -0.06 MPa for 20 minutes.

[0040] Example 2 Raw material ratio (mass percentage) Hydrophilic polymer dispersion (polyether segment 60 mol%): 50%; Fatty alcohol polyoxyethylene ether (oxyethylene addition number 15): 10%; Ammonia: 2%; Deionized water: 38%; Preparation process parameters Mixing and dispersion: stirring at 400 rpm, keeping warm at 80°C for 30 minutes, heating rate 5°C / min; Compounding temperature: 60°C, stirring at 500 rpm for 30 minutes; pH adjustment: 5.0 (adjustment time 5 minutes); Post-treatment: 100 mesh filtration, degassing at -0.08 MPa for 15 minutes.

[0041] Example 3 Raw material ratio (mass percentage) Hydrophilic polymer dispersion (polyether segment 50 mol%): 40%; Fatty alcohol polyoxyethylene ether (oxyethylene addition number 10): 7.5%; Citric acid: 1%; Deionized water: 51.5%; Preparation process parameters Mixing and dispersion: stirring at 300 rpm, keeping warm at 70°C for 45 minutes, heating rate 3°C / min; Compounding temperature: 50°C, stirring at 400 rpm for 20 minutes; pH adjustment: 5.0 (adjustment time 8 minutes); Post-treatment: 80 mesh filtration, degassing at -0.07 MPa for 18 minutes.

[0042] Example 4 Raw material ratio (mass percentage) Hydrophilic polymer dispersion (polyether segment 50 mol%): 40%; Fatty alcohol polyoxyethylene ether (oxyethylene addition number 10): 7.5%; Citric acid: 1%; Deionized water: 51.5%; Preparation process parameters Mixing and dispersion: stirring at 400 rpm, keeping warm at 80°C for 30 minutes, heating rate 5°C / min; Compounding temperature: 50℃, 400rpm stirring for 20 minutes; pH adjustment: 5.0 (adjustment time 8 minutes); Post-processing: 80 mesh filtration, -0.07MPa degassing for 18 minutes.

[0043] Example 5: Raw material ratio (mass percentage) Polyether chain segment 40mol%; hydrophilic polymer dispersion 35% + fatty alcohol polyoxyethylene ether 8% + citric acid 1% + deionized water 56%; Preparation process parameters Mixing dispersion: 300rpm stirring, 70℃ for 45 minutes, heating rate 3℃ / minute; Compounding temperature: 50℃, 400rpm stirring for 20 minutes; pH adjustment: 5.0 (adjustment time 8 minutes); Post-processing: 80 mesh filtration, -0.07MPa degassing for 18 minutes.

[0044] Example 6 Raw material ratio (mass percentage) Polyether chain segment 60mol%; hydrophilic polymer dispersion 35% + fatty alcohol polyoxyethylene ether 8% + citric acid 1% + deionized water 56%; Preparation process parameters Mixing dispersion: 300rpm stirring, 70℃ for 45 minutes, heating rate 3℃ / minute; Compounding temperature: 50℃, 400rpm stirring for 20 minutes; pH adjustment: 5.0 (adjustment time 8 minutes); Post-processing: 80 mesh filtration, -0.07MPa degassing for 18 minutes.

[0045] The hydrophilic and easy-to-clean finishing agent obtained in the above six examples is subjected to performance test, and the results are shown in the following table.

[0046] Test item Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Particle size distribution D50 0.15 μm 0.98 μm 0.5 μm (optimum) 0.75 μm 0.45 μm 0.6 μm Pepper oil removal rate 90% 96% 99% (optimum) 95% 94% 93% Oil-based pen mark removal rate 82% 89% 95% (optimum) 88% 91% 89% Hand stiffness (cm) 3.3 3.1 2.7 (optimum) 3.0 2.9 3.2 Film layer adhesion Medium Medium to weak Strong (optimum) Medium Strong Weak (easy to fall off) The performance of the hydrophilic and easy-to-clean finishing agent is tested by six groups of examples, and the technical scheme is verified from the particle size distribution, the soil removal effect, the hand feeling and the film layer adhesion, and the analysis is as follows: 1. Influence of particle size distribution D50 D50 is a key index for measuring the average size and distribution of particles, and the present application limits its range to 0.1-1μm: Example 3: D50 is 0.5μm, the particles form a dense hydrophilic film on the surface of the fabric, and the soil removal and film layer adhesion are optimal, which verifies that the particle size interval can achieve the best performance.

[0047] Embodiment 1 and 2: D50 approaches the upper and lower limits of the interval, and the particles appear to be agglomerated or the gap increases, resulting in more pores in the film layer, a decrease in density, a significant attenuation of the decontamination efficiency and the film layer binding force, and verifying the necessity of the parameter range limit.

[0048] Embodiment 6: The proportion of polyether segments reaches the upper limit (60 mol%), and the particle stability becomes poor, and the film layer binding force shows "weak (easy to fall off)", proving the scientificity of the proportion limit of polyether segments.

[0049] 2. Decontamination performance and raw materials and process The decontamination performance (pepper oil removal rate, oily pen mark removal rate) changes regularly with the raw material ratio and process parameters: Embodiment 3: The raw materials (polyether segment 50 mol%, polymer content 40%) and process (70°C, 300 rpm) take the middle value, the particles are uniformly dispersed, the film layer is dense, the pepper oil removal rate reaches 99%, and the oily pen mark removal rate reaches 95%, proving that the performance is optimal when the parameters are taken in the middle interval.

[0050] Embodiment 1 and 2: The raw material ratio deviates from the middle value, the particle dispersibility becomes poor, the film layer is discontinuous, and the decontamination rate attenuates, reflecting the influence of parameter boundaries on performance.

[0051] Embodiment 4: The process parameters reach the upper limit (temperature rise 5°C / min, stirring 400 rpm), the particles are agglomerated, D50 increases, the pepper oil removal rate decreases to 95%, and the oily pen mark removal rate decreases to 88%, verifying that the process parameters need to be strictly controlled.

[0052] 3. Hand stiffness and film layer binding force Hand feel: Embodiment 3 has uniformly dispersed particles and a good film layer flexibility, with a hand stiffness of 2.7 cm (optimal); Embodiment 2 has agglomerated particles, and Embodiment 6 has a too high proportion of polyether segments, resulting in an increase in stiffness.

[0053] Binding force: Embodiment 3 has a "strong" film layer binding force, and the hydrophilic angle attenuates by only 27% after 50 washes; Embodiments 1, 2 and 6 have a "medium", "medium-weak" and "weak (easy to fall off)" binding force due to parameter deviation, proving that the technical solution of the present application can improve the film layer binding force and wash resistance by controlling the raw materials and process.

[0054] For ease of understanding, the following further explains the test item of "pepper oil removal rate". The test item includes the following main steps: (1) Sample preparation: 7 groups of fabrics of the same material and size are selected as samples, of which 1~6 groups of samples are treated with the hydrophilic and easy-to-decontaminate finishing agent obtained in Embodiments 1~6, and the 7th group of fabric is not treated with the finishing agent (i.e. blank sample).

[0055] (2) Oil contamination: each group of samples is simultaneously immersed in a container containing chili oil (for simulating oil stains), so that the fabrics of each group of samples are uniformly contaminated, the contamination time and method are controlled to be consistent, and the initial oil stain amount is ensured to be similar.

[0056] (3) Washing and decontamination: the oil-stained samples are moved into a container containing tap water and left for 1 minute (for simulating a simple washing process), and the oil stain falling and dispersing situation is observed and recorded, and the residual oil stain amount is quantitatively analyzed by subsequent weighing and colorimeter.

[0057] In order to more intuitively reflect the test results, the test photos of the 7 groups of samples after step (3) are listed in the following table. Figure 1 The yellow color in the figure represents the chili oil remaining on the fabric, and the lighter the yellow color, the better the chili oil removal effect. It can be observed from the drawings that the blank sample cannot remove the chili oil in the tap water. The fabrics of samples 1 to 6 have been treated with the hydrophilic easy-to-clean finishing agent of embodiments 1 to 6 respectively, so that when immersed in chili oil and then in tap water, most of the chili oil on the fabric is removed. It can be seen that the hydrophilic easy-to-clean finishing agent proposed in the present application has strong decontamination ability.

[0058] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. It can be understood that for ordinary skilled persons in the art, equivalent replacement or change can be made according to the technical scheme and inventive concept of the present application, and all these changes or replacements shall fall within the protection scope of the present application.

Claims

1. A method for preparing a hydrophilic and easy-to-decontamination finishing agent, characterized in that: The following steps are involved: (1) Raw material preparation: Weigh 30% to 50% of a hydrophilic polymer dispersion, 5% to 10% of a nonionic surfactant, and 0.5% to 2% of a pH regulator by mass percentage, with the remainder being deionized water; the polymer in the hydrophilic polymer dispersion is a polyether-polyester block copolymer with a number average molecular weight of 10,000 to 30,000 g / mol, and the molecular chain contains hydroxyl groups and ether bond hydrophilic groups; the nonionic surfactant is a fatty alcohol polyoxyethylene ether; (2) Mixing and dispersion: Add the hydrophilic polymer dispersion and deionized water into the reaction vessel, stir at a rate of 200-400 rpm, and heat to 60-80 °C and maintain for 30-60 minutes until a uniform dispersion system is formed; (3) Surfactant compounding: Lower the temperature of the system to 40-60°C, add a nonionic surfactant, and maintain a stirring rate of 300-500 rpm for 15-30 minutes until the turbidity of the system stabilizes; (4) pH adjustment: Under stirring conditions of 100-200 rpm, use a pH adjuster to adjust the pH value of the system to 5.0±1.

0. The adjustment time shall not exceed 10 minutes. (5) Post-treatment: Cool the system to 20-25 °C, filter through a 50-100 mesh filter, and then degas at a vacuum degree of -0.06 to -0.08 MPa for 15-20 minutes to obtain a dispersion of a hydrophilic and easy-to-clean finishing agent.

2. The method for preparing a hydrophilic and easy-to-decontamination finishing agent according to claim 1, wherein: The deionized water was sterilized at 121° C. for 30 minutes before use.

3. The preparation method of the hydrophilic easy-to-decontamination finishing agent according to claim 1, characterized in that: The polyether-polyester block copolymer is prepared by an ester exchange reaction, wherein the polyether segment accounts for 40 to 60 mol%.

4. The method for preparing a hydrophilic and easy-to-decontamination finishing agent according to claim 1, wherein: The number of ethylene oxide addition groups of the fatty alcohol polyoxyethylene ether is 5 to 15.

5. The method for preparing a hydrophilic and easy-to-decontamination finishing agent according to claim 1, wherein: The reaction vessel is a stainless steel reactor equipped with a temperature control device with a temperature control accuracy of ±2°C.

6. The method for preparing a hydrophilic and easy-to-decontamination finishing agent according to claim 1, wherein: In step (2), the system heating rate is controlled to be 2~5℃ / min.

7. The method for preparing a hydrophilic and easy-to-decontamination finishing agent according to claim 1, wherein: In step (5), after filtration, the particle size distribution D50 of the finishing agent dispersion is 0.1~1 μm.

8. A hydrophilic and easy-to-decontamination finishing agent, characterized in that: The invention is prepared by the preparation method of the hydrophilic and easy-to-decontamination finishing agent according to any one of claims 1 to 7.

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