Hydrophilic smooth silicone oil finishing agent and preparation method thereof

Abstract

The invention relates to the technical field of finishing agents, in particular to a hydrophilic smooth silicone oil finishing agent and a preparation method thereof. Comprising the following components in parts by weight: 100-150 parts of modified amino silicone oil, 50-80 parts of polyether modified hydrophilic silicone oil, 20-60 parts of a modified organic silicon surfactant, 2-8 parts of an antistatic agent and 2-5 parts of organic acid, the modified amino silicon oil is synthesized by taking hydroxyl-terminated silicon oil, a novel 602 silane coupling agent and a basic catalyst as raw materials; the modified organic silicon surfactant is synthesized by taking vinyl chlorosilane, mercaptoacetic acid, mercaptopropionic acid, 2-mercaptosuccinic acid and tetramethylammonium hydroxide as raw materials. The prepared finishing agent has good softness and antistatic performance, and also has good water resistance and durability.

Description

Technical Field

[0001] The invention relates to the technical field of finishing agents, and more particularly to a hydrophilic and smooth silicone oil finishing agent and a preparation method thereof. Background Art

[0002] Clothing and other textile products are usually made of fabrics. Due to the structural characteristics of fabrics, dust collection has always been a difficult technical problem to solve. This is not only reflected in the production process, but also in the wearing process.

[0003] High-grade cotton fabrics often go through a singeing process during the dyeing process to remove the floating hair and miscellaneous hair on the surface. However, in this singeing process, the remaining hair ash after high-speed and high-temperature singeing is not cleaned, which often affects the subsequent processing.

[0004] Hydrophilic silicone oil is an ultrafine particle non / weakly cationic amino silicone softener with good hydrophilicity and compatibility with auxiliary agents; it has good shear stability, improves the sewing properties of fabrics, meets the requirements of knitted fabrics, provides good smoothness, and gives the fiber a soft and fluffy feel; it has good wash resistance, and the processed fabric will not turn yellow or discolor after 15 soap washings, and the product style will not be affected; it has low yellowing and excellent friction fastness and sunlight fastness; it does not contain APEO, has good stability, and does not float oil.

[0005] At present, when using hydrophilic silicone oil compound finishing agent to treat Roman cloth and polyester cloth, it is found that after using hydrophilic silicone oil treatment, although the fabric becomes softer, the surface of the fabric is not smooth enough, and the comfort of people wearing the fabric is reduced when the fabric is made into clothing.

[0006] The existing production process of hydrophilic dustproof silicone oil is complicated, and due to the poor adsorption of silicone oil, it does not have soft and antistatic properties: silicone oil is not durable and water-resistant. Summary of the invention

[0007] In order to solve the above problems in the prior art, the present invention provides a hydrophilic and smooth silicone oil finishing agent and a preparation method thereof.

[0008] In a first aspect, the present invention provides a hydrophilic and smooth silicone oil finishing agent, comprising the following components in parts by weight:

[0009] Modified amino silicone oil 100-150 parts,

[0010] 50-80 parts of polyether modified hydrophilic silicone oil,

[0011] 20-60 parts of modified silicone surfactant,

[0012] 2-8 parts of antistatic agent,

[0013] 2-5 parts of organic acid;

[0014] The modified amino silicone oil is synthesized with terminal hydroxyl silicone oil, new 602 silane coupling agent and alkaline catalyst as raw materials; the modified silicone surfactant is synthesized with vinyl chlorosilane, thioglycolic acid, mercaptopropionic acid, 2-mercaptosuccinic acid and tetramethylammonium hydroxide as raw materials.

[0015] Preferably, the modified amino silicone oil comprises 100-120 parts of terminal hydroxyl silicone oil, 0.5-1.2 parts of new 602 silane coupling agent, 0.1-0.5 parts of alkaline catalyst, 1.5-2.8 parts of modifier and 2-5 parts of glacial acetic acid.

[0016] Preferably, the modifier is one or more of N-aminoethylpiperazine, piperazine and morpholine, and N,N-dimethyl-1,3-propylenediamine.

[0017] Preferably, the preparation method of the modified amino silicone oil comprises the following steps: adding terminal hydroxyl silicone oil, novel 602 silane coupling agent and an appropriate amount of end-capping agent into a three-necked flask, starting stirring, heating to 60-80°C, dropping an alkaline catalyst, then adding a modifier, then heating to 100-110°C, keeping warm for 70-90 minutes, and continuing the reaction under vacuum conditions to obtain modified amino silicone oil.

[0018] Preferably, the polyether-modified hydrophilic silicone oil includes terminal hydrogen silicone oil, polyether diamine, allyl epoxy polyether, double-terminal epoxy polyether and toluene-2,4-diisocyanate, and the mass ratio of the terminal hydrogen silicone oil, polyether diamine, allyl epoxy polyether, double-terminal epoxy polyether and toluene-2,4-diisocyanate is: (1-2): (1-5): (2-4): (1-3): (1-2).

[0019] Preferably, the preparation method of the polyether-modified hydrophilic silicone oil comprises the following steps: adding hydrogen-terminated silicone oil and allyl epoxy polyether into a flask, stirring evenly and heating to 70°C, adding catalysts polyethylene glycol and toluene-2,4-diisocyanate, heating to 80°C and reacting for 4 hours, adding polyether diamine for amination, continuing to add double-terminated epoxy polyether for chain extension, and keeping the temperature to react to obtain the final product, polyether-modified hydrophilic silicone oil.

[0020] Preferably, the preparation method of the modified silicone surfactant comprises the following steps: vinylmethyldichlorosilane, mercaptoacetic acid, mercaptopropionic acid, 2-mercaptosuccinic acid and trimethylchlorosilane are mixed and placed in an ice-water bath; the mixture is stirred, isopropanol is added dropwise, the reaction is carried out for 30-50 minutes, and then deionized water is slowly added dropwise, the reaction is continued for 1-1.5 hours, stirring is stopped, and the mixture is allowed to stand until the solution has two layers, the organic layer is washed with deionized water until it is neutral, the molecular sieve is filtered, and the solvent is removed by reduced pressure distillation to obtain the modified silicone surfactant.

[0021] Preferably, the antistatic agent is one or more of stearyl dimethyl amyl ammonium chloride, octadecyl trimethyl ammonium chloride, polyoxyethylene sorbitan ester, alkylphenol (or fatty alcohol) polyoxyethylene ether phosphate salt, polystyrene sulfonate, polyvinyl benzyl trimethyl ammonium chloride, and maleic anhydride.

[0022] In a second aspect, the present invention provides a method for preparing a hydrophilic and smooth silicone oil finishing agent, comprising the following steps: mixing modified amino silicone oil and polyether modified hydrophilic silicone oil, adding modified silicone surfactant and antistatic agent, and finally adding organic acid and deionized water, and continuing stirring for 1-3 hours to obtain the hydrophilic and smooth silicone oil finishing agent.

[0023] Preferably, the weight average molecular weight of the hydrophilic and smooth silicone oil finishing agent is 12000-35000.

[0024] In summary, the present invention has the following beneficial effects:

[0025] 1. The polyether-modified polysiloxane in the present invention can be used as a hydrophilic finishing agent. The molecular structure contains a large number of hydrophilic polyether groups, which can solve the problems of silicone oil emulsification difficulty and emulsion demulsification and oil bleaching. If functional groups such as epoxy groups or amino groups are introduced into the molecular structure, it can be better "anchored" on the fiber, and the feel of the fabric can be significantly improved without affecting the hydrophilicity.

[0026] 2. The molecular weight of the hydrogen-terminated silicone oil of the present invention gradually increases, and the hydrophilicity of the synthesized hydrophilic silicone oil gradually decreases, mainly because the polysiloxane in the main chain structure increases, and the water-repellent groups in the molecular structure increase. When the molecular weight is 10,000, it is basically not hydrophilic. The addition of double-terminated epoxy polyether and toluene-2,4-diisocyanate makes the hydrophilicity better; as the molecular weight of the hydrogen-terminated silicone oil increases, the feel becomes better, the polysiloxane in the main chain structure dominates, the silicon-oxygen bond can rotate in 4 different directions, and the feel is richer and fuller; polyester fabric is slightly better than cotton fabric, probably because cotton fabric is a natural fiber, which is hydrophilic in itself and does not need more hydrophilic polyether to improve the feel;

[0027] 3. The present invention reduces the refractive index of the fabric surface by adding a modified organic silicon surfactant, thereby achieving a darkening effect and making the fabric feel soft. The fabric touch finishing and color deepening are performed simultaneously, which is energy-saving and environmentally friendly, saves dyes and reduces costs.

[0028] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not intended to limit the scope of protection of the present invention. DETAILED DESCRIPTION

[0029] The present invention is further described in detail below in conjunction with the examples. It is particularly noted that if no specific conditions are specified in the following examples, the reactions are carried out according to conventional conditions or conditions recommended by the manufacturer. Unless otherwise specified, the raw materials used in the following examples can be obtained from common commercial sources.

[0030] Preparation Example

[0031] Preparation Example 1

[0032] A modified amino silicone oil comprises 100g of terminal hydroxyl silicone oil, 0.5g of a novel 602 silane coupling agent, 0.1g of a basic catalyst, 1.5g of N-aminoethylpiperazine and 2g of glacial acetic acid.

[0033] The preparation method of modified amino silicone oil comprises the following steps: adding terminal hydroxyl silicone oil, a novel 602 silane coupling agent and an appropriate amount of a capping agent into a three-necked flask, starting stirring, heating to 80°C, dropping an alkaline catalyst, then adding a modifier, then heating to 100°C, keeping the temperature for 90 minutes, and continuing the reaction under vacuum conditions to obtain modified amino silicone oil.

[0034] Preparation Example 2

[0035] A modified amino silicone oil comprises 105 g of terminal hydroxyl silicone oil, 0.6 g of a new 602 silane coupling agent, 0.2 g of a basic catalyst, 1.8 g of N-aminoethylpiperazine and 3 g of glacial acetic acid.

[0036] The preparation method of modified amino silicone oil comprises the following steps: adding terminal hydroxyl silicone oil, a novel 602 silane coupling agent and an appropriate amount of a capping agent into a three-necked flask, starting stirring, heating to 80°C, dropping an alkaline catalyst, then adding a modifier, then heating to 100°C, keeping the temperature for 70 minutes, and continuing the reaction under vacuum conditions to obtain modified amino silicone oil.

[0037] Preparation Example 3

[0038] A modified amino silicone oil comprises 120g of terminal hydroxyl silicone oil, 1.2g of a novel 602 silane coupling agent, 0.5g of a basic catalyst, 2.8g of N-aminoethylpiperazine and 5g of glacial acetic acid.

[0039] The preparation method of modified amino silicone oil comprises the following steps: adding terminal hydroxyl silicone oil, a novel 602 silane coupling agent and an appropriate amount of a capping agent into a three-necked flask, starting stirring, heating to 80°C, dropping an alkaline catalyst, then adding a modifier, then heating to 110°C, keeping the temperature for 80 minutes, and continuing the reaction under vacuum conditions to obtain modified amino silicone oil.

[0040] Preparation Example 4

[0041] A polyether-modified hydrophilic silicone oil comprises hydrogen-terminated silicone oil, polyether diamine, allyl epoxy polyether, double-terminated epoxy polyether and toluene-2,4-diisocyanate, wherein the mass ratio of the hydrogen-terminated silicone oil, polyether diamine, allyl epoxy polyether, double-terminated epoxy polyether and toluene-2,4-diisocyanate is 1:3:2:1:2;

[0042] The preparation method of polyether modified hydrophilic silicone oil comprises the following steps: adding hydrogen-terminated silicone oil and allyl epoxy polyether into a flask, stirring evenly and heating to 70°C, adding catalysts polyethylene glycol and toluene-2,4-diisocyanate, heating to 80°C and reacting for 4 hours, adding polyether diamine for amination, continuously adding double-terminated epoxy polyether for chain extension, and keeping the temperature to react to obtain the final product polyether modified hydrophilic silicone oil.

[0043] Preparation Example 5

[0044] A polyether-modified hydrophilic silicone oil comprises hydrogen-terminated silicone oil, polyether diamine, allyl epoxy polyether, double-terminated epoxy polyether and toluene-2,4-diisocyanate, wherein the mass ratio of the hydrogen-terminated silicone oil, polyether diamine, allyl epoxy polyether, double-terminated epoxy polyether and toluene-2,4-diisocyanate is 2:5:3:2:1;

[0045] The preparation method of polyether modified hydrophilic silicone oil comprises the following steps: adding hydrogen-terminated silicone oil and allyl epoxy polyether into a flask, stirring evenly and heating to 70°C, adding catalysts polyethylene glycol and toluene-2,4-diisocyanate, heating to 80°C and reacting for 4 hours, adding polyether diamine for amination, continuously adding double-terminated epoxy polyether for chain extension, and keeping the temperature to react to obtain the final product polyether modified hydrophilic silicone oil.

[0046] Preparation Example 6

[0047] A polyether-modified hydrophilic silicone oil comprises hydrogen-terminated silicone oil, polyether diamine, allyl epoxy polyether, double-terminated epoxy polyether and toluene-2,4-diisocyanate, wherein the mass ratio of the hydrogen-terminated silicone oil, polyether diamine, allyl epoxy polyether, double-terminated epoxy polyether and toluene-2,4-diisocyanate is 2:3:4:3:2;

[0048] The preparation method of polyether modified hydrophilic silicone oil comprises the following steps: adding hydrogen-terminated silicone oil and allyl epoxy polyether into a flask, stirring evenly and heating to 70°C, adding catalysts polyethylene glycol and toluene-2,4-diisocyanate, heating to 80°C and reacting for 4 hours, adding polyether diamine for amination, continuously adding double-terminated epoxy polyether for chain extension, and keeping the temperature to react to obtain the final product polyether modified hydrophilic silicone oil.

[0049] Preparation Example 7

[0050] A method for preparing a modified organic silicon surfactant comprises the following steps: mixing 10g of vinylmethyldichlorosilane, 12g of thioglycolic acid, 5g of mercaptopropionic acid, 8g of 2-mercaptosuccinic acid and 3g of trimethylchlorosilane, and placing the mixture in an ice-water bath; mixing and stirring, dripping isopropanol, reacting for 30min, then slowly dripping deionized water, continuing the reaction for 1h, stopping stirring, standing, the solution presents an upper and lower layer, washing the organic layer with deionized water until it is neutral, filtering the molecular sieve, and removing the solvent by reduced pressure distillation to obtain the modified organic silicon surfactant.

[0051] Preparation Example 8

[0052] A method for preparing a modified organic silicon surfactant comprises the following steps: mixing 15g of vinylmethyldichlorosilane, 18g of thioglycolic acid, 8g of mercaptopropionic acid, 10g of 2-mercaptosuccinic acid and 5g of trimethylchlorosilane, and placing the mixture in an ice-water bath; mixing and stirring, dripping isopropanol, reacting for 30 minutes, then slowly dripping deionized water, continuing the reaction for 1 hour, stopping stirring, standing, the solution presents an upper and lower layer, washing the organic layer with deionized water until it is neutral, filtering the molecular sieve, and removing the solvent by reduced pressure distillation to obtain the modified organic silicon surfactant.

[0053] Preparation Example 9

[0054] A method for preparing a modified organic silicon surfactant comprises the following steps: mixing 18g of vinylmethyldichlorosilane, 15g of thioglycolic acid, 8g of mercaptopropionic acid, 12g of 2-mercaptosuccinic acid and 3g of trimethylchlorosilane, and placing the mixture in an ice-water bath; mixing and stirring, dripping isopropanol, reacting for 30 minutes, then slowly dripping deionized water, continuing the reaction for 1 hour, stopping stirring, standing, the solution presents an upper and lower layer, washing the organic layer with deionized water until it is neutral, filtering the molecular sieve, and removing the solvent by reduced pressure distillation to obtain the modified organic silicon surfactant.

[0055] Example

[0056] Example 1

[0057] A hydrophilic and smooth silicone oil finishing agent comprises the following components in parts by weight:

[0058] 100 g of modified amino silicone oil prepared in Preparation Example 2,

[0059] 50 g of polyether-modified hydrophilic silicone oil prepared in Preparation Example 5,

[0060] 20 g of the modified organic silicon surfactant prepared in Preparation Example 8,

[0061] Antistatic agent 2g,

[0062] 2g of organic acid, the organic acid is acetic acid;

[0063] The antistatic agent is stearyl dimethyl amyl ammonium chloride;

[0064] The preparation method of a hydrophilic and smooth silicone oil finishing agent comprises the following steps: mixing modified amino silicone oil and polyether modified hydrophilic silicone oil, adding modified organic silicone surfactant and antistatic agent, and finally adding organic acid and deionized water, and continuing stirring for 1 hour to obtain a hydrophilic and smooth silicone oil finishing agent.

[0065] Example 2

[0066] A hydrophilic and smooth silicone oil finishing agent comprises the following components in parts by weight:

[0067] 120 g of modified amino silicone oil prepared in Preparation Example 1,

[0068] 60 g of polyether-modified hydrophilic silicone oil prepared in Preparation Example 4,

[0069] 40 g of the modified organosilicon surfactant prepared in Preparation Example 7,

[0070] Antistatic agent 5g,

[0071] 3g of organic acid, the organic acid is acetic acid;

[0072] The antistatic agent is stearyl dimethyl amyl ammonium chloride;

[0073] The preparation method of a hydrophilic and smooth silicone oil finishing agent comprises the following steps: mixing modified amino silicone oil and polyether modified hydrophilic silicone oil, adding modified organic silicone surfactant and antistatic agent, and finally adding organic acid and deionized water, and continuing stirring for 1 hour to obtain a hydrophilic and smooth silicone oil finishing agent.

[0074] Example 3

[0075] A hydrophilic and smooth silicone oil finishing agent comprises the following components in parts by weight:

[0076] 135 g of modified amino silicone oil obtained in Preparation Example 3,

[0077] 55 g of polyether-modified hydrophilic silicone oil prepared in Preparation Example 5,

[0078] 45 g of the modified organosilicon surfactant prepared in Preparation Example 8,

[0079] Antistatic agent 5g,

[0080] 5g of organic acid, the organic acid is acetic acid;

[0081] The antistatic agent is stearyl dimethyl amyl ammonium chloride;

[0082] The preparation method of a hydrophilic and smooth silicone oil finishing agent comprises the following steps: mixing modified amino silicone oil and polyether modified hydrophilic silicone oil, adding modified organic silicone surfactant and antistatic agent, and finally adding organic acid and deionized water, and continuing stirring for 1 hour to obtain a hydrophilic and smooth silicone oil finishing agent.

[0083] Example 4

[0084] A hydrophilic and smooth silicone oil finishing agent comprises the following components in parts by weight:

[0085] 145 g of modified amino silicone oil obtained in Preparation Example 2,

[0086] 65 g of polyether-modified hydrophilic silicone oil prepared in Preparation Example 6,

[0087] 35 g of the modified silicone surfactant prepared in Preparation Example 9,

[0088] Antistatic agent 8g,

[0089] 3g of organic acid, the organic acid is acetic acid;

[0090] The antistatic agent is stearyl dimethyl amyl ammonium chloride;

[0091] The preparation method of a hydrophilic and smooth silicone oil finishing agent comprises the following steps: mixing modified amino silicone oil and polyether modified hydrophilic silicone oil, adding modified organic silicone surfactant and antistatic agent, and finally adding organic acid and deionized water, and continuing stirring for 1 hour to obtain a hydrophilic and smooth silicone oil finishing agent.

[0092] Example 5

[0093] A hydrophilic and smooth silicone oil finishing agent comprises the following components in parts by weight:

[0094] 100 g of modified amino silicone oil obtained in Preparation Example 3,

[0095] 50 g of polyether-modified hydrophilic silicone oil prepared in Preparation Example 5,

[0096] 25 g of the modified organic silicon surfactant prepared in Preparation Example 8,

[0097] Antistatic agent 7g,

[0098] 4 g of organic acid, the organic acid is acetic acid;

[0099] The antistatic agent is stearyl dimethyl amyl ammonium chloride;

[0100] The preparation method of a hydrophilic and smooth silicone oil finishing agent comprises the following steps: mixing modified amino silicone oil and polyether modified hydrophilic silicone oil, adding modified organic silicon surfactant and antistatic agent, and finally adding organic acid and deionized water, and continuing stirring for 1-3 hours to obtain a hydrophilic and smooth silicone oil finishing agent.

[0101] Example 6

[0102] A hydrophilic and smooth silicone oil finishing agent comprises the following components in parts by weight:

[0103] 125 g of modified amino silicone oil obtained in Preparation Example 2,

[0104] 75 g of polyether-modified hydrophilic silicone oil prepared in Preparation Example 6,

[0105] 38 g of the modified organosilicon surfactant prepared in Preparation Example 8,

[0106] Antistatic agent 5g,

[0107] 4 g of organic acid, the organic acid is acetic acid;

[0108] The antistatic agent is stearyl dimethyl amyl ammonium chloride;

[0109] The preparation method of a hydrophilic and smooth silicone oil finishing agent comprises the following steps: mixing modified amino silicone oil and polyether modified hydrophilic silicone oil, adding modified organic silicone surfactant and antistatic agent, and finally adding organic acid and deionized water, and continuing stirring for 1 hour to obtain a hydrophilic and smooth silicone oil finishing agent.

[0110] Comparative Example

[0111] Comparative Example 1

[0112] The difference between this comparative example and Example 3 is that no modified amino silicone oil is added, and the remaining steps and raw materials are the same as Example 3.

[0113] Comparative Example 2

[0114] The difference between this comparative example and Example 3 is that no polyether-modified hydrophilic silicone oil is added, and the remaining steps and raw materials are the same as those of Example 3.

[0115] Comparative Example 3

[0116] The difference between this comparative example and Example 3 is that no modified silicone surfactant is added, and the remaining steps and raw materials are the same as Example 3.

[0117] The hydrophilic and smooth silicone oil finishing agents prepared in Examples 1-6 and Comparative Examples 1-3 were prepared into aqueous solutions for post-finishing cotton fabrics, and then the hand feel and hydrophilicity performance tests were performed. The test results are shown in Table 1.

[0118] Performance Testing

[0119] 1. Hand feel: The actual hand feel evaluation method is adopted. After the finished fabric is cooled and moisturized, it is comprehensively evaluated by professional and experienced hand feel evaluators in terms of softness, smoothness, fluffiness, etc. The hand feel of the original fabric is rated as level 1, and the best hand feel evaluation is level 5.

[0120] 2. Hydrophilicity: Use the static water drip method to drop a drop of water 1 cm away from the fabric, and determine the hydrophilicity based on the time it takes for the water drop to completely diffuse.

[0121] Table 1 Hand feel and hydrophilicity test results

[0122]

[0123] From the test results of Examples 1-6 and Comparative Examples 1-3 in Table 1, it can be seen that the finishing agent prepared in the examples has better performance, which shows that the smaller the molecular weight of the polyether epoxy silicone oil, the softer the hand feel and the faster the hydrophilicity; the larger the molecular weight of the polyether epoxy silicone oil, the smoother the hand feel and the slower the hydrophilicity; the finishing agent of Example 3 has better hand feel and hydrophilicity, because after adding the modified silicone surfactant, the finishing reduces the refractive index of the fabric surface, achieves a darkening effect, and makes the fabric feel soft.

[0124] In Examples 1-6, the decrease in hydrophilicity after 5 water washings is relatively small, indicating that the finishing agent of the present invention has good adhesion to the textile and can achieve good water washing resistance, which shows that polyether-modified polysiloxane can be used as a hydrophilic finishing agent. The molecular structure contains a large number of hydrophilic polyether groups, which can solve the problems of difficulty in emulsification of silicone oil and emulsion demulsification and oil bleaching. If functional groups such as epoxy groups or amino groups are introduced into the molecular structure, they can be better "anchored" on the fiber, and the feel of the fabric can be significantly improved without affecting the hydrophilicity.

[0125] The above is only an exemplary embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A hydrophilic and smooth silicone oil finishing agent, characterized in that: The composition comprises the following components in parts by weight: Modified amino silicone oil 100-150 parts, 50-80 parts of polyether modified hydrophilic silicone oil, 20-60 parts of modified silicone surfactant, 2-8 parts of antistatic agent, 2-5 parts of organic acid; The modified amino silicone oil is synthesized with terminal hydroxyl silicone oil, new 602 silane coupling agent and alkaline catalyst as raw materials; the modified silicone surfactant is synthesized with vinyl chlorosilane, thioglycolic acid, mercaptopropionic acid, 2-mercaptosuccinic acid and tetramethylammonium hydroxide as raw materials.

2. The hydrophilic and smooth silicone oil finishing agent according to claim 1, characterized in that: The modified amino silicone oil comprises 100-120 parts of terminal hydroxyl silicone oil, 0.5-1.2 parts of novel 602 silane coupling agent, 0.1-0.5 parts of alkaline catalyst, 1.5-2.8 parts of modifier and 2-5 parts of glacial acetic acid.

3. The hydrophilic and smooth silicone oil finishing agent according to claim 2, characterized in that: The modifier is one or more of N-aminoethylpiperazine, piperazine and morpholine, and N,N-dimethyl 1,3-propylenediamine.

4. The hydrophilic and smooth silicone oil finishing agent according to claim 2, characterized in that: The preparation method of the modified amino silicone oil comprises the following steps: adding terminal hydroxyl silicone oil, a novel 602 silane coupling agent and an appropriate amount of a capping agent into a three-necked flask, starting stirring, heating to 60-80° C., dropping an alkaline catalyst, then adding a modifier, then heating to 100-110° C., keeping the temperature for 70-90 minutes, and continuing the reaction under vacuum conditions to obtain the modified amino silicone oil.

5. The hydrophilic and smooth silicone oil finishing agent according to claim 1, characterized in that: The polyether-modified hydrophilic silicone oil includes terminal hydrogen silicone oil, polyether diamine, allyl epoxy polyether, double-terminal epoxy polyether and toluene-2,4-diisocyanate, and the mass ratio of the terminal hydrogen silicone oil, polyether diamine, allyl epoxy polyether, double-terminal epoxy polyether and toluene-2,4-diisocyanate is: (1-2): (1-5): (2-4): (1-3): (1-2).

6. The hydrophilic and smooth silicone oil finishing agent according to claim 1, characterized in that: The preparation method of the polyether-modified hydrophilic silicone oil comprises the following steps: adding hydrogen-terminated silicone oil and allyl epoxy polyether into a flask, stirring evenly and heating to 70°C, adding catalysts polyethylene glycol and toluene-2,4-diisocyanate, heating to 80°C for reaction for 4 hours, adding polyether diamine for amination, continuously adding double-terminated epoxy polyether for chain extension, and heat-keeping for reaction to obtain the final product, the polyether-modified hydrophilic silicone oil.

7. The hydrophilic and smooth silicone oil finishing agent according to claim 1, characterized in that: The preparation method of the modified organic silicon surfactant comprises the following steps: vinylmethyldichlorosilane, mercaptoacetic acid, mercaptopropionic acid, 2-mercaptosuccinic acid and trimethylchlorosilane are mixed and placed in an ice water bath; the mixture is mixed and stirred, isopropanol is added dropwise, the reaction is carried out for 30-50 minutes, deionized water is slowly added dropwise, the reaction is continued for 1-1.5 hours, the stirring is stopped, the mixture is allowed to stand, the solution is formed into two layers, the organic layer is washed with deionized water until it is neutral, the molecular sieve is filtered, and the solvent is removed by reduced pressure distillation to obtain the modified organic silicon surfactant.

8. The hydrophilic and smooth silicone oil finishing agent according to claim 1, characterized in that: The antistatic agent is one or more of stearyl dimethyl amyl ammonium chloride, octadecyl trimethyl ammonium chloride, polyoxyethylene sorbitan ester, alkylphenol (or fatty alcohol) polyoxyethylene ether phosphate salt, polystyrene sulfonate, polyvinyl benzyl trimethyl ammonium chloride, and maleic anhydride.

9. The method for preparing the hydrophilic and smooth silicone oil finishing agent according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: mixing modified amino silicone oil and polyether modified hydrophilic silicone oil, adding modified organic silicone surfactant and antistatic agent, and finally adding organic acid and deionized water, and continuing stirring for 1-3 hours to obtain the hydrophilic smooth silicone oil finishing agent.

10. The method for preparing the hydrophilic and smooth silicone oil finishing agent according to claim 9, characterized in that: The weight average molecular weight of the hydrophilic and smooth silicone oil finishing agent is 12000-35000.

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