Synthesis method and application of non-isocyanate polyurethane modified organic silicon functional finishing agent

Abstract

The invention relates to the technical field of functional finishing agents, and discloses a synthesis method and application of a non-isocyanate polyurethane modified organic silicon functional finishing agent, and the synthesis method comprises the following steps: S1, obtaining non-isocyanate polyurethane modified organic silicon; s2, preparing an emulsion to finally obtain the fabric finishing agent. Through the design and the synergistic effect of the whole technical scheme, the unification of environmental protection and high performance is realized, and the practical value is remarkable. Cyclic carbonate preparation provides a high-quality precursor for amine modification, the amine modification endows the silicone oil with a core functional group, the emulsification step ensures the application feasibility of the finishing agent, and the adaptation of the catalyst, the solvent and the process parameters ensures the reaction efficiency and the product quality of each link; all the components do not function independently, but through structural complementation and performance synergy, the finishing agent has the multiple advantages of being environmentally friendly, non-toxic, excellent in hand feeling, hydrophilic, stable and the like at the same time.

Description

Technical Field

[0001] This invention relates to the field of functional finishing agents, specifically a method for synthesizing and applying a non-isocyanate polyurethane modified organosilicon functional finishing agent. Background Technology

[0002] Fabric finishing is a crucial step in textile processing. By applying finishing agents, the surface properties of fabrics can be improved, endowing them with special functions such as softness, hydrophilicity, and stability. Among these, silicone finishing agents are the most widely used in the industry due to their ability to significantly optimize the hand feel of fabrics. These silicone materials are typically linear polysiloxanes that are liquid at room temperature. Their molecular backbone consists of repeating Si-O segments, with organic groups directly bonded to silicon atoms, resulting in excellent soft and smooth properties.

[0003] Polyurethane, a high-performance polymer, is formed by the addition polymerization of polyisocyanates and polyols. It not only has excellent mechanical and processing properties, but also good chemical stability and biocompatibility. It is often used to modify organosilicon to further improve the overall performance of textile finishing agents and meet the diverse needs of textile applications.

[0004] However, the traditional synthesis process of polyurethane has significant drawbacks: it relies on binary or polyisocyanates as core raw materials, and isocyanates are highly chemically reactive, easily react with water, and are highly toxic, posing potential safety hazards in production, storage, and use. More importantly, the industrial synthesis of isocyanates requires toxic phosgene as a raw material, which not only poses a serious threat to the health of operators but also has a negative impact on the ecological environment, and brings many inconveniences to the subsequent processing of polyurethane materials.

[0005] Therefore, developing a safe, non-toxic, environmentally friendly, and stable polyurethane-based fabric finishing agent has become an urgent need for the current industry development. Summary of the Invention

[0006] The purpose of this invention is to overcome the problems existing in the prior art and provide a safe and environmentally friendly method for preparing a non-isocyanate polyurethane finishing agent.

[0007] To address the problems in the prior art, this invention provides a method for synthesizing a non-isocyanate polyurethane modified organosilicon functional finishing agent, comprising the following steps: Preparation of S1 modified organosilicon: By mass percentage, 31.35%-87.02% of terminal epoxy silicone oil or polyether epoxy silicone oil, 0%-31.35% of N,N-dimethylformamide, and 0.35%-0.71% of catalyst are added to a high-pressure reactor. After closing the reactor, stirring is started, and carbon dioxide gas is continuously introduced until the pressure inside the reactor stabilizes at 1.0-3.0 MPa. The heating device is started, and the reaction system is heated to 80-150℃ and kept at this temperature for 6-16 hours. Samples are taken during the reaction, and the samples are detected using an infrared spectrometer. When the 906 cm⁻¹ is confirmed... -1 When no characteristic absorption peak of the epoxy group is observed, it indicates that the epoxy group is completely transformed. Stop heating and allow the mixture to cool naturally to room temperature to terminate the first step of the reaction. Add 8.70%-22.78% organic solvent to the reactor and stir until the cyclic carbonate formed in the system is completely dissolved. Then slowly add 1.11%-7.23% diamine. Restart heating and raise the system to 80-130℃, maintaining the temperature for 3-10 hours. Take a sample for infrared spectroscopy detection. When the peak at 1799 cm⁻¹ is confirmed... -1 When the characteristic absorption peak of acyclic carbonate is reached, it indicates that the cyclic carbonate has completely reacted. Heating is then stopped, and the mixture is cooled to room temperature before being discharged to obtain a non-isocyanate polyurethane-modified organosilicon. S2 Emulsion Preparation: Weigh 20-50% of the non-isocyanate polyurethane modified silicone obtained in step S1, 2-8% of the emulsifier, and 0.3-1.3% of glacial acetic acid by mass percentage. After mixing, turn on the high-speed disperser and slowly add 43.7-73.6% of deionized water. Continue stirring until a uniformly flowing microemulsion is formed, which yields the non-isocyanate polyurethane modified silicone functional finishing agent.

[0008] As a further technical solution, the molecular weight of the terminal epoxy silicone oil or polyether epoxy silicone oil mentioned in step S1 is 2000-25000.

[0009] As a further technical solution, the catalyst in step S1 is selected from one or more of tetrabutylammonium bromide, lithium chloride, lithium bromide, and tetrabutylammonium chloride.

[0010] As a further technical solution, the diamine mentioned in step S1 is selected from one of tetramethylhexanediamine, triethylenetetramine, tetraethylenepentamine, D400 polyetheramine, and D2000 polyetheramine; As a further technical solution, the organic solvent in step S1 is selected from one or more of isopropanol, ethylene glycol butyl ether, and diethylene glycol butyl ether.

[0011] As a further technical solution, the emulsifier in step S2 is selected from one or more mixtures of the following: isotridecyl alcohol polyoxyethylene ether series, MULTISO 13 / 30, MULTISO 13 / 50, MULTISO 13 / 80, BASF Lutensol's XL series and XP series.

[0012] As a further technical solution, the rotation speed of the high-speed disperser in step S2 is 1000-3000 rpm.

[0013] The application of the non-isocyanate polyurethane modified organosilicon functional finishing agent prepared by the synthesis method in fabric finishing is as follows: the functional finishing agent is prepared into a finishing solution, and the fabric is treated by a one-dip-one-puff padding process, with the padding pressure controlled at 2KG and the machine speed at 25m / min. After treatment, the fabric is set at 150℃ for 90s and allowed to naturally regain moisture for 2h to complete the functional finishing of the fabric.

[0014] The beneficial effects of this invention are: 1. In the technical solution of this invention, the selection of raw materials and the design of the cyclic carbonate preparation steps solve the environmental and safety problems of traditional technologies from the source. This invention selects epoxy silicone oil or polyether epoxy silicone oil with a molecular weight of 2000-25000 as the base material. The epoxy groups in its molecular structure provide stable active sites for subsequent reactions, and the molecular weight range is optimized to ensure both reaction activity and suitability for the application requirements of the final finishing agent. The cyclic carbonate is prepared by the addition reaction of CO2 with epoxy silicone oil, completely eliminating the toxic isocyanate monomers in traditional polyurethane synthesis and fundamentally eliminating the toxicity risk. During the reaction, catalysts such as tetrabutylammonium bromide and lithium chloride can efficiently catalyze the insertion of CO2 into epoxy groups, significantly improving the reaction rate and conversion rate. Solvents such as N,N-dimethylformamide can be flexibly adjusted in dosage according to the solubility of the raw materials to ensure uniform dispersion of the reaction system and avoid incomplete local reactions. Furthermore, the pressure parameters of 1.0-3.0 MPa, temperature of 80-150℃, and heat preservation for 6-16 hours are matched with the reactivity of the raw materials. Combined with infrared spectroscopy, the characteristic peak of the epoxy group at 906 cm⁻¹ is observed. -1 Monitoring ensures complete conversion of epoxy groups, which not only successfully fixes CO2 and provides a new path to solve carbon emission problems, but also provides high-purity and high-activity cyclic carbonate raw materials for subsequent modification reactions.

[0015] 2. The synergistic effect of amine modification and emulsification significantly improves the application performance and stability of the finishing agent. In the amine modification stage, diamines such as tetramethylhexanediamine and polyetheramine combine with cyclic carbonates through a three-stage nucleophilic reaction: in the first stage, the amine nucleophilically attacks the carbonyl carbon of the cyclic carbonate to form a tetrahedral intermediate; in the second stage, the unreacted amine abstracts hydrogen ions from the intermediate; and in the third stage, the carbon-oxygen bond is broken by the electron cloud of the nitrogen atom and rapidly combines with hydrogen ions to generate the product. This reaction mechanism results in the formation of modified silicone oil containing urethane bonds, whose molecular structure simultaneously possesses the soft and smooth properties of siloxanes and the excellent mechanical properties of polyurethanes. Organic solvents such as isopropanol and ethylene glycol butyl ether play a good dissolving role in this process, promoting uniform contact between cyclic carbonates and amines and avoiding incomplete reaction caused by local aggregation. In the emulsification stage, emulsifiers such as isotridecyl alcohol polyoxyethylene ether series and BASF Lutensol series form a synergistic system with glacial acetic acid and deionized water. Under high-speed stirring at 1000-3000 rpm, the modified silicone oil is dispersed into a stable microemulsion, ensuring that the finishing agent can be uniformly adhered to the fabric surface and is not easily detached. The structural compatibility of each component and the control of process parameters result in a balanced improvement in softness, smoothness, and bulkiness of the finished fabric, while significantly optimizing hydrophilicity. After 2 hours, the water absorption rate of the knitted fabric is generally better than that of the control sample.

[0016] 3. The overall technical solution design and synergistic effect achieve a balance between environmental protection and high performance, demonstrating significant practical value. The selection of raw materials and process steps are closely integrated: cyclic carbonate preparation provides a high-quality precursor for amine modification, amine modification imparts core functional groups to silicone oil, the emulsification step ensures the feasibility of the finishing agent, and the matching of catalysts, solvents, and process parameters ensures the reaction efficiency and product quality of each step. The components do not function in isolation, but rather complement each other structurally and synergistically, enabling the finishing agent to possess multiple advantages such as being environmentally friendly and non-toxic, having an excellent feel, and being hydrophilically stable. At the macro level, this solution completely solves the safety and environmental problems of traditional polyurethane synthesis, which relies on isocyanates and phosgene, avoiding health risks and environmental pollution during production and use. Meanwhile, compared to traditional organosilicon finishing agents, the modified silicone oil of this invention achieves a breakthrough in fabric finishing performance through the synergistic effect of siloxane and polyurethane structures. Its softness and bulkiness reach level 5, its hydrophilicity remains stable over a long period, and its emulsion exhibits good stability at 50°C, meeting the needs of industrial production and practical use. This provides a novel, environmentally friendly, and well-balanced finishing agent for the fabric finishing field, with broad application prospects. Detailed Implementation

[0017] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] All raw materials used in the embodiments of this invention are commercially available conventional products. The molecular weights of the double-ended epoxy silicone oil and double-ended polyether epoxy silicone oil are nominal values. Catalysts, solvents, amine compounds, emulsifiers, etc., are all of industrial grade purity. Infrared spectroscopy detection was performed using a conventional Fourier transform infrared spectrometer, and high-speed dispersion was achieved using a laboratory standard high-speed disperser. The "906cm" mentioned in the embodiments... -1 "No absorption peak at 1799 cm⁻¹" is used to confirm complete conversion of epoxy groups. -1 The absence of an absorption peak is used to confirm that the cyclic carbonate groups have completely reacted, and this is a standard method for determining the endpoint of a reaction in this field.

[0019] Reaction mechanism: 1) Preparation of Cyclic Carbonates: Cyclic carbonates are important raw materials for the preparation of non-isocyanate polyurethanes, and the most common synthesis method is the CO2 insertion method. The method of this invention involves reacting CO2 with epoxy silicone oil to obtain terminal cyclic carbonate silicone oil. The synthesis mechanism is as follows: ; ; ; 2) Reaction of Cyclic Carbonates with Amines: The reaction of primary amines with cyclic carbonates mainly involves three stages. In the first stage, the carbon atom in the carbonyl group of the cyclic carbonate structure is nucleophilically attacked by the amine in the amine compound, forming a tetrahedron containing an intermediate. In the second stage, the intermediate formed in the first stage is attacked by the amine that has not undergone nucleophilic attack, causing the intermediate to lose a hydrogen ion. Finally, in the third stage, in the intermediate structure that has lost a hydrogen ion, the carbon-oxygen bond is broken by the high-density electron cloud on the nitrogen atom. At this time, the hydrogen ion rapidly combines with the newly formed alkoxy ion to obtain the final product. In the third stage of the reaction, the carbon-oxygen bond is broken in two ways, so the product has isomers.

[0020] Phase 1: ; Phase Two: ; Phase Three: ; Example 1:

[0021] Preparation of modified organosilicon By mass percentage, 69.96% of 2000 molecular weight double-ended epoxy silicone oil, 7.00% of N,N-dimethylformamide, and 0.35% of tetrabutylammonium bromide were added to a high-pressure reactor. After closing the reactor, stirring was started, and carbon dioxide gas was continuously introduced until the pressure inside the reactor stabilized at 1.0 MPa. The heating device was then activated, and the reaction system was heated to 120°C and maintained at this temperature for 10 hours. Samples were taken during the reaction, and infrared spectroscopy was used to analyze the samples. When the 906 cm⁻¹ was confirmed... -1 When no characteristic absorption peak of the epoxy group is observed, it indicates that the epoxy group is completely transformed. Heating is then stopped, and the mixture is allowed to cool naturally to room temperature to terminate the first step of the reaction. 15.46% ethylene glycol butyl ether is added to the reactor, and the mixture is stirred until the cyclic carbonate formed in the system is completely dissolved. Then, 7.23% tetramethylhexanediamine is slowly added. Heating is restarted, and the system is heated to 120°C and maintained at this temperature for 4 hours. Samples are taken for infrared spectroscopy detection. When the peak at 1799 cm⁻¹ is confirmed... -1 When the characteristic absorption peak of acyclic carbonate is reached, it indicates that the cyclic carbonate has completely reacted. After stopping heating and cooling to room temperature, the material is discharged to obtain modified organosilicon.

[0022] Emulsification process Weigh 40% of the above modified organosilicon, 2% of MULTISO 13 / 50, 2% of MULTISO 13 / 80 and 0.8% of glacial acetic acid into a dispersion vessel by mass percentage. Turn on the high-speed disperser and set the speed to 2000 rpm. Slowly add 55.2% deionized water dropwise while stirring. Continue to disperse until the system forms a homogeneous emulsion with good flowability. Stop the dispersion to obtain the target product.

[0023] Example 2

[0024] Preparation of modified organosilicon By mass percentage, 31.35% of 25000 molecular weight double-ended epoxy silicone oil, 31.35% of N,N-dimethylformamide, and 0.63% of tetrabutylammonium chloride were added to a high-pressure reactor. Carbon dioxide was introduced while stirring to stabilize the pressure inside the reactor at 3.0 MPa. The temperature was raised to 80℃ and the reaction was maintained for 16 hours. Samples were taken and analyzed by infrared spectroscopy, confirming a 906 cm⁻¹ diameter. -1 After no absorption peak was observed, the temperature was lowered to room temperature to terminate the first step of the reaction. A mixed solvent of 15.83% diethylene glycol butyl ether and 15.83% isopropanol was added, and the cyclic carbonate was dissolved by stirring. Then, 5.02% D2000 polyetheramine was added. The temperature was raised to 80°C and the reaction was maintained for 10 hours. Infrared spectroscopy confirmed the peak value at 1799 cm⁻¹. -1 After the absorption peak disappears, the material is cooled and discharged to obtain modified organosilicon.

[0025] Emulsification process By mass percentage, add 30% modified organosilicon, 6% AEO-3 (isomeric tridecyl alcohol polyoxyethylene ether), and 0.3% glacial acetic acid to the dispersion vessel, turn on the high-speed disperser, set the speed to 1000 rpm, slowly add 63.7% deionized water, and continue to disperse until a uniform flowing emulsion is formed, which is the target product.

[0026] Example 3

[0027] Preparation of modified organosilicon By mass percentage, 71.63% of 13000 molecular weight double-ended epoxy silicone oil, 3.58% of N,N-dimethylformamide, and 0.71% of lithium chloride were added to a high-pressure reactor. Carbon dioxide was introduced under stirring until the pressure stabilized at 1.5 MPa. The temperature was raised to 130°C and the reaction was maintained for 8 hours. Infrared spectroscopy confirmed a 906 cm⁻¹. -1 After no absorption peak was observed, the first step of the reaction was terminated by cooling. 22.78% diethylene glycol butyl ether was added, and the cyclic carbonate was dissolved by stirring. Then, 1.30% triethylenetetramine was added. The temperature was raised to 110°C, and the reaction was maintained for 5 hours. Infrared spectroscopy confirmed a peak value of 1799 cm⁻¹. -1 After the absorption peak disappears, the material is cooled and discharged to obtain modified organosilicon.

[0028] Emulsification process Weigh 20% modified organosilicon, 3% BASF Lutensol XL50, 3% BASF Lutensol XL80 and 0.4% glacial acetic acid into a dispersion vessel. Set the speed of the high-speed disperser to 2500 rpm and slowly add 73.6% deionized water dropwise until a uniform flowing emulsion is formed, thus obtaining the target product.

[0029] Example 4

[0030] Preparation of modified organosilicon By weight percentage, 67.66% of 20000 molecular weight double-ended polyether epoxy silicone oil, 13.53% of N,N-dimethylformamide, and 0.68% of lithium bromide were added to a high-pressure reactor. Carbon dioxide was introduced under stirring until the pressure stabilized at 2.0 MPa. The temperature was raised to 90°C and the reaction was maintained for 14 hours. Infrared spectroscopy confirmed a 906 cm⁻¹. -1 After no absorption peak was observed, the first step of the reaction was terminated by cooling. 16.37% ethylene glycol butyl ether was added, and the cyclic carbonate was dissolved by stirring. Then, 1.76% D400 polyetheramine was added. The temperature was raised to 90°C, and the reaction was maintained for 8 hours. Infrared spectroscopy confirmed a peak value of 1799 cm⁻¹. -1 After the absorption peak disappears, the material is cooled and discharged to obtain modified organosilicon.

[0031] Emulsification process By mass percentage, 25% modified organosilicon, 1% BASF Lutensol XP30, 1% BASF Lutensol XP80 and 0.5% glacial acetic acid are added to a dispersion vessel. The high-speed disperser is set to 1500 rpm, and 73.5% deionized water is slowly added. The dispersion is continued until a uniform flowing emulsion is formed, which is the target product.

[0032] Example 5

[0033] Preparation of modified organosilicon By mass percentage, 87.02% of 6000 molecular weight double-ended polyether epoxy silicone oil and 0.44% of tetrabutylammonium bromide were added to a high-pressure reactor. Carbon dioxide was introduced under stirring until the pressure stabilized at 1.8 MPa. The temperature was raised to 150°C and the reaction was maintained for 6 hours. Infrared spectroscopy confirmed a 906 cm⁻¹. -1 After no absorption peak was observed, the first step of the reaction was terminated by cooling. 8.70% isopropanol was added, and the cyclic carbonate was dissolved by stirring. Then, 3.84% tetraethylenepentamine was added. The temperature was raised to 80°C, and the reaction was maintained for 10 hours. Infrared spectroscopy confirmed a peak value of 1799 cm⁻¹. -1 After the absorption peak disappears, the material is cooled and discharged to obtain modified organosilicon.

[0034] Emulsification process Weigh 30% modified organosilicon, 4% MULTISO 13 / 50, 4% MULTISO 13 / 80 and 0.3% glacial acetic acid into a dispersion vessel by mass percentage. Set the speed of the high-speed disperser to 2000 rpm and slowly add 61.7% deionized water dropwise until a uniform flowing emulsion is formed, thus obtaining the target product.

[0035] Example 6

[0036] Preparation of modified organosilicon By weight percentage, 59.57% of 12000 molecular weight double-ended polyether epoxy silicone oil, 29.79% of N,N-dimethylformamide, and 0.60% of tetrabutylammonium chloride were added to a high-pressure reactor. Carbon dioxide was introduced under stirring until the pressure stabilized at 3.0 MPa. The temperature was raised to 90°C and the reaction was maintained for 14 hours. Infrared spectroscopy confirmed a 906 cm⁻¹. -1 After no absorption peak was observed, the first step of the reaction was terminated by cooling. 8.93% ethylene glycol butyl ether was added, and the cyclic carbonate was dissolved by stirring. Then, 1.11% tetramethylhexanediamine was added. The temperature was raised to 90°C, and the reaction was maintained for 8 hours. Infrared spectroscopy confirmed a peak value of 1799 cm⁻¹. -1 After the absorption peak disappears, the material is cooled and discharged to obtain modified organosilicon.

[0037] Emulsification process By mass percentage, 50% modified organosilicon, 5% MULTISO 13 / 50 and 1.3% glacial acetic acid are added to a dispersion vessel. The high-speed disperser is set to a speed of 1800 rpm, and 43.7% deionized water is slowly added. The dispersion is continued until a uniform flowing emulsion is formed, which is the target product.

[0038] Application performance rating: The hand feel was evaluated using milk silk knitted fabric, polyester knitted fabric, and nylon spandex fabric. Finishing solutions containing appropriate softeners were used, and the fabrics were subjected to a padding process (one dip and one pad, pressure 2KG, speed 25m / min, setting temperature 150℃, setting time 90s). After 2 hours of moisture regain, the hand feel, hydrophilicity, and stability were compared and tested.

[0039] Hand feel rating: The overall hand feel (softness, smoothness, fluffiness) is evaluated by touch. A rating system of 1 to 5 is used, where 1 is almost imperceptible and 5 is noticeably imperceptible. Five people evaluate at the same time and the average value is taken. Washing will affect the density and softness of the fabric fibers. To reduce the impact of fabric fiber deformation, a method of comparing hand feel in the middle is used. See Table 1. Table 1 Rating Level 5 Level 4 Level 3 Level 2 Level 1 Clearly feel More noticeable feeling Slight feeling slight sensation Almost no feeling Hydrophilicity evaluation: Refer to AATCC 79-2014 Test method for water absorption of textiles; Hand feel performance test: Performance tests were conducted using a control sample (the silicone finishing agent SILYOUWETT6185 used in the finishing solution was from Guangdong Demei Silicone Co., Ltd.) and Examples 1-6. The test results are shown in Table 2. Table 2 sample Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Comparison sample Finishing solution concentration 10g / L 10g / L 10g / L 10g / L 10g / L 10g / L 10g / L Softness evaluation Level 4 Level 1 Level 4 Level 3 Level 4 Level 5 Level 3 Slippage Evaluation Level 1 Level 5 Level 3 Level 4 Level 2 Level 3 Level 3 Fluffiness rating Level 2 Level 4 Level 3 Level 4 Level 5 Level 3 Level 4 Table 3 Hydrophilicity Test

[0040] Stability test: Prepare a 20 g / L solution, add 5 g / L Na2SO4, and heat to 50℃, 60℃, and 80℃ and hold at these temperatures for 10 min; Table 4 first match 50℃ 60℃ 80℃ Example 1 Colorless and transparent Stablize Stablize Slightly turbid Example 2 Colorless and transparent Stablize turbid Turbid flocculation Example 3 Colorless and transparent Stablize Slightly turbid Turbid floating oil Example 4 Colorless and transparent Stablize Stablize Stablize Example 5 Colorless and transparent Stablize turbid Turbid floating oil Example 6 Colorless and transparent Stablize Stablize Stablize Comparison sample Colorless and transparent Stablize Slightly turbid Slightly turbid As can be seen, the overall performance of the embodiment is excellent.

[0041] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for synthesizing a non-isocyanate polyurethane modified organosilicon functional finishing agent, characterized in that, Includes the following steps: Preparation of S1 modified organosilicon: By mass percentage, 31.35%-87.02% of terminal epoxy silicone oil or polyether epoxy silicone oil, 0%-31.35% of N,N-dimethylformamide, and 0.35%-0.71% of catalyst are added to a high-pressure reactor. After closing the reactor, stirring is started, and carbon dioxide gas is continuously introduced until the pressure inside the reactor stabilizes at 1.0-3.0 MPa. The heating device is started, and the reaction system is heated to 80-150℃ and kept at this temperature for 6-16 hours. Samples are taken during the reaction, and the samples are detected using an infrared spectrometer. When the 906 cm⁻¹ is confirmed... -1 When no characteristic absorption peak of the epoxy group is observed, it indicates that the epoxy group is completely transformed. Stop heating and allow the mixture to cool naturally to room temperature to terminate the first step of the reaction. Add 8.70%-22.78% organic solvent to the reactor and stir until the cyclic carbonate formed in the system is completely dissolved. Then slowly add 1.11%-7.23% diamine. Restart heating and raise the system to 80-130℃, maintaining the temperature for 3-10 hours. Take a sample for infrared spectroscopy detection. When the peak at 1799 cm⁻¹ is confirmed... -1 When the characteristic absorption peak of acyclic carbonate is reached, it indicates that the cyclic carbonate has completely reacted. Heating is then stopped, and the mixture is cooled to room temperature before being discharged to obtain a non-isocyanate polyurethane-modified organosilicon. S2 Emulsion Preparation: Weigh 20-50% of the non-isocyanate polyurethane modified silicone obtained in step S1, 2-8% of the emulsifier, and 0.3-1.3% of glacial acetic acid by mass percentage. After mixing, turn on the high-speed disperser and slowly add 43.7-73.6% of deionized water. Continue stirring until a uniformly flowing microemulsion is formed, which yields the non-isocyanate polyurethane modified silicone functional finishing agent.

2. The synthesis method according to claim 1, characterized in that, The molecular weight of the terminal epoxy silicone oil or polyether epoxy silicone oil mentioned in step S1 is 2000-25000.

3. The synthesis method according to claim 1, characterized in that, The catalyst mentioned in step S1 is selected from one or more of tetrabutylammonium bromide, lithium chloride, lithium bromide, and tetrabutylammonium chloride.

4. The synthesis method according to claim 1, characterized in that, The diamine mentioned in step S1 is selected from one of tetramethylhexanediamine, triethylenetetramine, tetraethylenepentamine, D400 polyetheramine, and D2000 polyetheramine.

5. The synthesis method according to claim 1, characterized in that, The organic solvent mentioned in step S1 is selected from one or more of isopropanol, ethylene glycol butyl ether, and diethylene glycol butyl ether.

6. The synthesis method according to claim 1, characterized in that, The emulsifier mentioned in step S2 is selected from one or more mixtures of the following: isotridecyl alcohol polyoxyethylene ether series, MULTISO 13 / 30, MULTISO 13 / 50, MULTISO 13 / 80, BASF Lutensol's XL series and XP series.

7. The synthesis method according to claim 1, characterized in that, The high-speed disperser in step S2 rotates at a speed of 1000-3000 rpm.

8. The application of the non-isocyanate polyurethane modified organosilicon functional finishing agent prepared by any of the synthesis methods described in claims 1-7 in fabric finishing, characterized in that, The application method is as follows: the functional finishing agent is prepared into a finishing solution, and the fabric is treated by a one-dip-one-paddle process. The padding pressure is controlled at 2KG and the machine speed is 25m / min. After treatment, the fabric is set at 150℃ for 90s and then naturally rehydrated for 2h to complete the functional finishing of the fabric.

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