Preparation method of acrylate modified block silicone oil

Abstract

The invention provides a preparation method of solvent-free acrylate modified amino silicone oil. The preparation method comprises the following steps: preparing an acrylate intermediate 1 from tetramethylcyclotetrasiloxane and methacrylate under the action of a platinum catalyst; preparing an acrylic acid carbonyl epoxy double end socket from the hydrogen-containing double end socket and glycidyl methacrylate under the action of a platinum catalyst; s2, adding the acrylic acid carbonyl epoxy double end socket prepared in the step S1 and polyether amine, and carrying out heating reaction to obtain a hydroxyl-containing polyamine coupling agent intermediate 2; and S3, carrying out balanced copolymerization on the intermediate 1, the intermediate 2 and an organic silicon monomer to obtain the solvent-free acrylate modified amino silicon oil. The preparation method has the advantage of high degree of micromolecule hydrosilylation reaction. The whole process is free of solvation, so that not only is the environment protected, but also the safety risk in the transportation process is reduced. The excellent hand feeling, low yellowing and washability of the fabric are ensured, the colored light phenomenon on the surface of the fabric is effectively relieved, and the wet rubbing color fastness and the dry rubbing color fastness of the fabric are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of functional modified silicone oil synthesis and textile finishing, and particularly relates to a production process of multifunctional modified silicone oil that is soft, fluffy, washable and environmentally friendly. Background Art

[0002] Amidst a booming global economy and growing environmental awareness, the market is raising expectations for the performance and environmental performance of silicone softening agents. As a key auxiliary in textile printing and dyeing finishing, silicone softeners are rapidly transitioning towards multifunctionality, low carbonization, and sustainable green properties. Currently, linear block polyether-amino terpolymer-modified silicone fluids, produced using terpolymer technology, have become the mainstream in the industry. These products, owing to their exceptional soft feel, stable acid and alkali resistance, and anti-roller sticking properties, have rapidly captured approximately 50% of the silicone oil finishing agent market share.

[0003] However, current segmented silicone oil products still have significant environmental shortcomings. First, the synthesis process relies on large amounts of organic solvents such as isopropyl alcohol and ethylene glycol monobutyl ether. These substances are not only flammable and explosive, but also pose fire and explosion risks during production and transportation. Their high volatility also exacerbates air pollution. Second, residual organic solvents in the finishing agent can interfere with the color stability of the fabric, causing color deviations and reducing the fabric's color fastness to friction. Switching to environmentally friendly high-boiling-point solvents significantly increases production costs. Third, during the high-temperature setting stage of fabric finishing, the volatile organic compounds (VOCs) emitted by the volatilization of organic solvents not only violate strict environmental regulations but also pose a potential threat to the respiratory health of workers and surrounding residents, running counter to the current concept of green production and clean printing and dyeing.

[0004] When fabrics are treated with existing aminosilicone softeners, the amino groups in the softener absorb dimethylsiloxane onto the fabric surface, creating a soft and smooth feel. However, when the ammonia content of existing aminosilicone softeners is low, the treated fabric exhibits strong resistance to yellowing, but suffers from a poor feel and poor washability, becoming stiff and rough after several washes. Higher ammonia content results in a better feel and washability, but poor resistance to yellowing. Summary of the Invention

[0005] To address these challenges, the present invention provides a novel method for synthesizing solvent-free modified aminosilicone oils. By introducing highly polar groups such as ester, carbonyl, and amino groups into the siloxane backbone and side chains, this method creates extremely strong orientation and adsorption properties, significantly improving the directional alignment of the siloxane on fabrics and imparting an incredibly soft, smooth, fluffy, and rich texture. Furthermore, it significantly improves fabric hygroscopicity, rapidly absorbing and dissipating perspiration for dry and comfortable wear. Furthermore, it exhibits excellent durability, perfectly aligning with the current trend toward multifunctional, environmentally friendly textile printing and dyeing auxiliaries.

[0006] The following steps are involved: S1: First, add tetramethylcyclotetrasiloxane and platinum catalyst to the reactor, replace the atmosphere with nitrogen, and heat it to 60-70°C. Then, add methyl acrylate dropwise. After the addition is completed, keep the temperature to react for 4-8 hours, and remove the unreacted monomers under high vacuum to obtain tetramethylcyclotetrasiloxane methyl tetraacrylate intermediate (referred to as intermediate 1). Then, add hydrogen-containing double-sealed head and platinum catalyst to another reactor, replace the atmosphere with nitrogen, and heat it to 60-70°C. Then, add glycidyl acrylate dropwise. After the addition is completed, keep the temperature to react for 4-8 hours, and remove the unreacted monomers under high vacuum to obtain acrylic acid carbonyl epoxy double-sealed head.

[0007] S2: Add the acrylic acid carbonyl epoxy double head and polyetheramine prepared in step S1 into the reaction kettle, and keep the temperature at 80-100° C. for 6-10 hours to obtain the hydroxyl-containing polyamine coupling agent intermediate 2.

[0008] S3: Add the organosilicon monomer, the acrylate intermediate 1 in step 1, and the hydroxyl polyamine coupling agent intermediate 2 in step 2 into a reactor together with stirring and heating to 90°C. Add an alkaline catalyst, keep the temperature at 100-115°C for 2-3 hours, heat to 130-150°C and keep the temperature for 1-2 hours to deactivate the catalyst, and then remove the unreacted low-boiling substances in vacuo to obtain solvent-free acrylate-modified amino silicone oil.

[0009] The acrylic acid ester in step S1 may include any one or more of methyl acrylate, methyl methacrylate, ethyl acrylate, and ethyl methacrylate. The reaction temperature is 60-80°C for 6-10 hours. After the reaction is complete, unreacted monomers are removed in vacuo. The platinum catalyst is a platinum complex catalyst, used in an amount of 3-5 ppm.

[0010] The molar ratio of D4H to acrylate is 1:4.0-4.5; the molar ratio of hydrogenated double end cap to glycidyl methacrylate is 1:2.0-2.5; in the preferred embodiment, the molar ratio of D4H to acrylate is 1:4.05; the molar ratio of hydrogenated double end cap to glycidyl methacrylate is 1:2.05.

[0011] In step S1, the acrylate and glycidyl methacrylate are added dropwise, and the addition process is controlled within 1-2 hours.

[0012] This technical method utilizes the active amino groups on a small-molecule polyetheramine to react with the epoxy groups on an acrylic carbonyl-epoxy double-end in a ring-opening reaction, significantly increasing the reaction rate and extent of the groups, shortening the preparation time and energy consumption of the segmented silicone oil. The resulting hydroxycarbonyl polyamine coupling agent system is free of free polyetheramine monomer and epoxy double-end. Under alkaline conditions, intermediate 1 and a silicone monomer (DMC) undergo a ring-opening and chain-extending reaction at the Si-O-Si bond of the hydroxycarbonyl polyamine coupling agent. After the reaction is complete, low-boiling substances and odor are removed by vacuum distillation to yield a green, solvent-free acrylic-modified amino silicone oil. This solvent-free process not only protects the environment but also reduces safety risks during transportation. While ensuring excellent fabric hand feel and low-yellowing washability, it also effectively reduces surface coloration and improves both wet and dry rubbing color fastness.

[0013] The polyetheramine in S2 is any one or more combinations of ED200, ED400, ED600, D400, T403, ED900, and ED2003; The molar ratio of acrylic acid carbonyl epoxy double head to polyether amine is 1:1.5-2.0. The epoxy double head is added to the diamine under nitrogen atmosphere and stirred at 80-100° C. for 6-10 hours to obtain the product.

[0014] The mass ratio of the silicone monomer, the acrylate intermediate 1 and the intermediate 2 in step S3 is 8-50:5-15:1-3, preferably 8-40:3-8:1-3.

[0015] In order to improve the soft style of the hand finishing agent, the polyetheramine in S2 is preferably T403 or ED600. The mass ratio of dimethylsiloxane ring body: intermediate 1: intermediate 2 is 8-15:3-5:1-3; In order to improve the fluffy and smooth hand-slip properties of the finishing agent, preferably, the polyetheramine in S2 is preferably T403 or ED900, and the mass ratio of dimethylsiloxane ring body: intermediate 1: intermediate 2 is 15-30:5-8:1; In order to reduce yellowing while ensuring the soft and loose style of the finishing agent, the polyetheramine in S2 is preferably T403 or ED600, and the mass ratio of dimethylsiloxane ring body: intermediate 1: intermediate 2 is 12-15:6-8:1.

[0016] The invention provides a fabric feel finishing agent, which is prepared by emulsifying the solvent-free acrylate modified amino silicone oil prepared by the above method.

[0017] The emulsification comprises the following steps: adding an emulsifier and glacial acetic acid to acrylate-modified amino silicone oil, controlling the oil-emulsification ratio to 5:1-9:1, with the glacial acetic acid accounting for 2-3% of the acrylate-modified amino silicone oil, and emulsifying to form a transparent to translucent homogeneous emulsion, thereby obtaining a fabric feel finishing agent.

[0018] The emulsifier is one or more of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, and isomeric tridecanol polyoxyethylene ether.

[0019] Preferably, the emulsifier is two or more of fatty alcohol polyoxyethylene ether with 5-20 polyoxyethylene units, alkylphenol polyoxyethylene ether, and isomeric tridecanol polyoxyethylene ether.

[0020] The present invention has the following beneficial effects: By introducing strong polar groups such as ester, carbonyl and amino groups into the main chain and side chain of siloxane through hydrosilylation, strong orientation and adsorption properties are generated. After the fabric is finished with a finishing agent and baked at high temperature, the ester, hydroxyl, carbonyl and amino groups in the main chain and side chain of siloxane undergo a series of physical reactions with polyester fibers, such as similar phase fusion and co-crystallization, which greatly improves the directional arrangement and film-forming properties of siloxane on the fabric, especially polyester fabric, giving the fabric an unimaginably soft, fluffy, rich and full texture.

[0021] The ring-opening reaction between the active amino groups on a small-molecule polyetheramine and the epoxy groups on an acrylic carbonyl epoxy double-capped end greatly increases the reaction rate and degree of the groups. The resulting modified aminosilicone oil system is free of free polyetheramine monomer and epoxy double-capped end. By adjusting the dimethylsiloxane ring: intermediate 1: intermediate 2 ratio, a solvent-free modified aminosilicone oil is prepared. Even with a low ammonia content, this oil can effectively tailor the hand feel to individual customer needs, significantly reducing fabric yellowing. The completely solvent-free process of preparing this modified aminosilicone oil not only protects the environment but also reduces safety risks during transportation. While ensuring excellent hand feel, low yellowing, and washability, it also effectively reduces surface coloration, thereby improving both wet and dry rubbing color fastness. This product perfectly aligns with the development trend of multifunctional, environmentally friendly textile printing and dyeing auxiliaries. DETAILED DESCRIPTION

[0022] The embodiments of the present invention will be described in detail below with reference to the examples, but it will be understood by those skilled in the art that the following examples are merely illustrative of the present invention and should not be construed as limiting the scope of the invention. In the present invention, unless otherwise specified, all percentages are by weight, and the equipment and raw materials used are commercially available or commonly used in the art. The methods in the following examples, unless otherwise specified, are conventional methods in the art.

[0023] Example 1 S1: D4H and 3ppm chloroplatinic acid catalyst were first added to the reactor, and the temperature was raised to 60°C after nitrogen substitution, and then methyl methacrylate was added dropwise, and the reaction temperature was controlled at 60-80°C. The molar ratio of D4H to acrylate was 1:3.98-4.01. After the addition was completed, the temperature was kept at 80-85°C for 5 hours, and then the temperature was lowered to obtain methyl acrylate modified intermediate 1; then a hydrogen-containing double head and 3ppm chloroplatinic acid catalyst were added to another reactor, and the temperature was raised to 60°C after nitrogen substitution, and then glycidyl acrylate was added dropwise. After the addition was completed, the temperature was kept at 80-85°C for 8 hours, and the unreacted monomers were removed under high vacuum to obtain acrylic acid carbonyl epoxy double head.

[0024] S2: Add T403 to the reactor, replace the atmosphere with nitrogen, and then add the acrylic acid carbonyl epoxy double head prepared in step S1 with stirring under nitrogen protection. The molar ratio of acrylic acid carbonyl epoxy double head to T403 is 1:1.9. Keep the reaction at 80-90°C for 8 hours and then cool down to obtain the hydroxycarbonyl-containing polyamine coupling agent intermediate 2.

[0025] S3: 15 parts of DMC, 5 parts of intermediate 1, 1 part of intermediate 2 and 200 ppm of alkaline catalyst were added to the reactor in sequence, and equilibrium polymerization was carried out at 110-115°C for 2 hours. The temperature was then raised to 140°C and kept at this temperature for 1.5 hours to deactivate the catalyst. Finally, low-boiling substances were removed in vacuo to obtain solvent-free acrylate-modified amino silicone oil.

[0026] S4: Add the solvent-free acrylate modified amino silicone oil prepared in S3 into the emulsifying kettle, add fatty alcohol polyoxyethylene ether AEO-3 and AEO-9 compound emulsifier at an oil-emulsion ratio of 6:1, and then add 3% glacial acetic acid, and perform high-speed shear emulsification to obtain a transparent homogeneous emulsion, which is the hand-feel finishing agent.

[0027] Example 2 The difference from Example 1 is that one portion of intermediate 2 in S3 is replaced by two portions, and the rest are the same.

[0028] Example 3 The difference from Example 1 is that one portion of intermediate 2 in S3 is replaced by three portions, and the rest are the same.

[0029] Example 4 The difference from Example 1 is that 5 parts of intermediate 1 in S3 are replaced by 10 parts, and the rest are the same.

[0030] Example 5 The difference from Example 1 is that 5 parts of Intermediate 1 in S3 are replaced by 15 parts, and the rest are the same.

[0031] Example 6 The difference from Example 1 is S3: 30 parts of DMC, 15 parts of intermediate 1, 1 part of intermediate 2 and 200 ppm of basic catalyst are added to the reactor in sequence, and the rest are the same.

[0032] Table 1 shows the reaction material components and corresponding physical and chemical indicators of Examples 1-6.

[0033]

[0034] Comparative Example 1 is a method for preparing a solvent-containing block silicone oil, which differs from the embodiment in that:

[0035] S1: Add hydrogen-containing double-sealed head and 3ppm chloroplatinic acid catalyst into the kettle, replace with nitrogen, and heat to 60°C. Then, add glycidyl acrylate dropwise. After the addition is complete, keep the temperature and react for 8 hours. After removing the unreacted monomers under high vacuum, obtain acrylic acid carbonyl epoxy double-sealed head.

[0036] S2: 20 parts of DMC, 1 part of the acrylic acid carbonyl epoxy double-end in S1 and 200 ppm of the alkaline catalyst were added to the reactor in sequence. The equilibrium polymerization was carried out at 110-115°C for 3 hours. The temperature was then raised to 140-150°C and kept for 1 hour to deactivate the catalyst. Finally, the low boiling point was removed by vacuum to obtain a carbonyl-terminated epoxy silicone oil with a molecular weight of 8000.

[0037] :S3: Add the carbonyl-terminated epoxy silicone oil and T403 prepared in S2 into the kettle, with the molar ratio of carbonyl-terminated epoxy silicone oil to T403 being 1:1.9, and then add 40% isopropanol by total mass. After keeping the temperature at 80-85℃ for 10-12h, remove 30% isopropanol by vacuum distillation to obtain 90% block silicone oil.

[0038] S4: Add the block silicone oil prepared in S3 into the emulsifying kettle, add fatty alcohol polyoxyethylene ether AEO-3 and AEO-9 compound emulsifier at an oil-emulsion ratio of 5:1, and then add 3% glacial acetic acid, and perform high-speed shear emulsification to obtain a transparent homogeneous emulsion, which is the hand-feel finishing agent.

[0039] Comparative Example 2 A method for preparing a high-content block silicone oil. Based on Comparative Example 1, after the reaction is completed, 30% of the isopropanol is removed by reduced pressure distillation to obtain a block silicone oil with a content of 90%.

[0040] Table 2 shows the reaction material components and corresponding physical and chemical indicators of Comparative Example 1-2.

[0041] Comparative Example 3 A method for preparing a solvent-free modified amino silicone oil comprises the following steps: S1: Add hydrogen-containing double-sealed head and 3ppm chloroplatinic acid catalyst to the kettle in sequence, replace the atmosphere with nitrogen, and heat to 60°C. Then, add glycidyl acrylate dropwise. After the addition is complete, keep the temperature and react for 8 hours. After removing the unreacted monomers under high vacuum, obtain acrylic acid carbonyl epoxy double-sealed head.

[0042] S2: Add T403 to the reactor, replace the atmosphere with nitrogen, and then add the acrylic acid carbonyl epoxy double head prepared in step S1 with stirring under nitrogen protection. The molar ratio of acrylic acid carbonyl epoxy double head to T403 is 1:1.9. Keep the reaction at 80-90°C for 8 hours and then cool down to obtain the hydroxycarbonyl-containing polyamine coupling agent intermediate 2.

[0043] S3: 8 parts of DMC, 1 part of intermediate 2 and 200 ppm of alkaline catalyst were added to the reactor in sequence, and equilibrium polymerization was carried out at 110-115°C for 2 hours. The temperature was then raised to 140°C and kept at this temperature for 1.5 hours to deactivate the catalyst. Finally, low-boiling substances were removed in vacuo to obtain solvent-free acrylate-modified amino silicone oil.

[0044] S4: Add the solvent-free acrylate modified amino silicone oil prepared in S3 into the emulsifying kettle, add fatty alcohol polyoxyethylene ether AEO-3 and AEO-9 compound emulsifier at an oil-emulsion ratio of 6:1, and then add 3% glacial acetic acid, and perform high-speed shear emulsification to obtain a transparent homogeneous emulsion, which is the hand-feel finishing agent.

[0045] Comparative Example 4 The difference from Comparative Example 3 is that 8 parts of DMC in S3 are replaced by 15 parts, and the rest are the same.

[0046] Comparative Example 5 The difference from Comparative Example 3 is that 8 parts of DMC in S3 are replaced by 30 parts, and the rest are the same.

[0047] Comparative Example 6 The difference from Comparative Example 3 is that 8 parts of DMC in S3 are replaced by 45 parts, and the rest are the same.

[0048] Table 2 shows the reaction material components and corresponding physical and chemical indicators of Comparative Example 1-2.

[0049]

[0050] Table 3 shows the reaction material components and corresponding physical and chemical indicators of Comparative Examples 3-6.

[0051]

[0052] Performance testing: The softening finishes prepared in Examples 1-6 and Comparative Examples 1-2 were sampled and compared with a representative commercial softening finish, using a 10 g / L working solution. Ten 20 cm x 30 cm pieces of untreated polyester-cotton fabric from each Example and Comparative Example were finished and tested for performance. All test samples were soaked in the working solution for 3 minutes, then treated with a double dip and double padding process using a small variable frequency padder, achieving a padding yield of 70%. The samples were then dried in a small sample drying machine at 160°C for 90 seconds. After moisture absorption at room temperature, performance evaluation was performed.

[0053] (1) Fabric feel and whiteness performance test The hand feel was evaluated using an eight-person hand-touch method. The fabric's softness, resilience, and smoothness after treatment were evaluated on a scale of 1 to 6, with higher values ​​indicating better hand feel. The eight scores were then averaged, excluding the single score with the largest error. A Colorquest colorimeter was used to measure WIE whiteness. Higher values ​​indicate better whiteness and less yellowing.

[0054] (2) Test of fabric color fastness to rubbing and washing Four samples of Examples 1-8, Comparative Examples 1-2 and samples treated with popular softeners on the market were taken respectively. 32 implementation samples and 8 comparison samples were all made of the same all-polyester-cotton printed fabric. The dry and wet friction color fastness of the fabrics were tested by a friction fastness tester and a washing color fastness tester in accordance with the standards specified in GB / T3920-1997. At the same time, the staining of the fabrics was evaluated using a staining sample card, and the average value was taken as the result.

[0055] (3) Fabric feel and washability Test method for hand feel and washability: The treated fabric is washed in a standard washing machine at 45°C with 20g of standard detergent ECE for 15 minutes each time, for 30 washes. The fabric score after washing is divided by the score before washing, and the result is multiplied by 100%. The final hand feel retention rate is rounded up. The hand feel before washing is assumed to be 100%.

[0056] Table 4 shows the application evaluation indicators of Examples 1-6 and Comparative Examples 1-6.

[0057]

[0058] Application Evaluation Index: As shown in Table 4, due to the high ammonia value and the presence of ester groups in the system, the fabrics treated in Examples 2 and 3 have good feel and wash resistance, with slightly reduced anti-yellowing performance, making them suitable for finishing dark fabrics. Compared with the solvent-free modified amino silicone oils prepared in Comparative Examples 3-6, the feel, wash resistance, and yellowing resistance of the finished fabrics in Examples 1-6 were significantly improved when the ammonia value was essentially the same. In particular, when other conditions such as the ammonia value were essentially the same, Example 5 and Comparative Example 5, and Example 6 and Comparative Example 6, only the introduction of an ester bond in the siloxane side chain resulted in better overall application performance. This may be because the ester of the siloxane side chain undergoes a similar fusion with the polyester fabric during the high-temperature baking process, embedding itself into the polyester fiber, thereby anchoring the finishing agent to the fabric surface, giving the fabric a rich feel, wash resistance, and reduced yellowing, making it suitable for finishing light-colored fabrics. The dry rubbing color fastness, wet rubbing color fastness and polyester staining test results obtained for Examples 1-6, Comparative Examples 2-6 and Kefeng's softening finishing agent are basically the same, but the result of Comparative Example 1 is lower than the other test results in terms of dry rubbing color fastness, wet rubbing color fastness and polyester staining by 1.3, 0.7 and 1.0, respectively.

[0059] The above embodiments are merely preferred technical solutions of the present invention and should not be construed as limiting the present invention. The embodiments and features in the embodiments of this application may be arbitrarily combined with each other unless they conflict. The scope of protection of the present invention shall be the technical solutions described in the claims, including equivalent alternatives to the technical features of the technical solutions described in the claims. Equivalent alternatives and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. A method for preparing solvent-free acrylate-modified amino silicone oil, characterized in that: The following steps are involved: S1: Tetramethylcyclotetrasiloxane and acrylate are reacted with platinum catalyst to prepare acrylate intermediate 1; Acrylic carbonyl epoxy double head was prepared by using hydrogen double head and glycidyl methacrylate in the presence of platinum catalyst; S2: Add the acrylic acid carbonyl epoxy double end cap prepared in step S1 and the polyetheramine into a reaction kettle, and heat at 80-100° C. for 6-10 hours to obtain a hydroxyl-containing polyamine coupling agent intermediate 2; S3: Add the organosilicon monomer, the acrylate intermediate 1 in step 1, and the hydroxyl polyamine coupling agent intermediate 2 in step 2 into a reactor and heat and stir. Add an alkaline catalyst and keep the temperature at 100-115°C for 2-3 hours. Heat to 130-150°C and keep the temperature to deactivate the catalyst. Then remove the unreacted low-boiling substances in vacuo to obtain solvent-free acrylate-modified amino silicone oil.

2. The method for preparing the solvent-free acrylate-modified amino silicone oil according to claim 1, wherein The acrylic ester in step S1 includes any one or more of methyl acrylate, methyl methacrylate, ethyl acrylate, and ethyl methacrylate; the molar ratio of D4H to acrylic ester is 1:4.0-4.5; the molar ratio of hydrogen-containing double head to glycidyl methacrylate is 1:2.0-2.5, the temperature is 60-80°C, the reaction is carried out for 6-10 hours, and after the reaction is completed, the unreacted monomer is removed in vacuo; the platinum catalyst is a platinum complex catalyst, and the amount used is 3-5ppm.

3. The method for preparing the solvent-free acrylate-modified amino silicone oil according to claim 1, wherein In step S1, the acrylate and glycidyl methacrylate are added dropwise, and the addition process is controlled within 1-2 hours.

4. The method for preparing the solvent-free acrylate-modified amino silicone oil according to claim 1, wherein The polyetheramine in step S2 is one or a combination of two or more of ED200, ED400, D400, ED600, T403, ED900, and ED2003, and the molar ratio of acrylic acid carbonyl epoxy double head to polyetheramine is 1:1.5-2.

0.

5. The method for preparing the solvent-free acrylate-modified amino silicone oil according to claim 1, wherein The organosilicon monomer in step S3 is a mixture of one or more of the acrylate intermediate 1 and dimethylsiloxane ring (DMC).

6. The method for preparing the solvent-free acrylate-modified amino silicone oil according to claim 1, wherein The mass ratio of the silicone monomer, the acrylate intermediate 1 and the intermediate 2 in step S3 is 8-50:5-15:1-3.

7. A fabric feel finishing agent, characterized in that: A fabric feel finishing agent with a solid content of 10-30% is prepared by emulsifying the solvent-free acrylate-modified amino silicone oil prepared by the method according to any one of claims 1 to 6.

8. The fabric feel finishing agent according to claim 7, characterized in that The emulsification process includes the following steps: adding an emulsifier, solvent-free acrylate-modified amino silicone oil and glacial acetic acid into an emulsifier kettle, controlling the oil-emulsification ratio to 5:1-9:1, with the glacial acetic acid accounting for 2-3% of the acrylate-modified amino silicone oil, performing high-speed shearing to form a transparent to translucent homogeneous emulsion, thus obtaining a fabric feel finishing agent, and then performing post-finishing on the fabric.

9. The fabric feel finishing agent according to claim 8, characterized in that The emulsifier is one or more of fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, and isomeric tridecanol polyoxyethylene ether.

10. The fabric feel finishing agent according to claim 8, characterized in that: The finishing agent with a solid content of 30% is diluted with water to a finishing agent of 2-10 g / L and used to finish the fabric. The fabric is finished by two-in-two-bundling, with a bath ratio of 1:20-1:30, a bundle residue rate of 70-90%, a baking temperature of 150-160°C, and baking for 1-2 minutes to obtain a fabric feel finishing agent.

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