Anti-mosquito fabric finishing agent as well as preparation method and application thereof

Abstract

The invention discloses an anti-mosquito fabric finishing agent as well as a preparation method and application thereof, and the preparation method comprises the following steps: S1, hydrogen-containing silicone oil, allyl epoxy terminated polyether and allyl hydroxyl terminated polyether react in a first solvent and a first catalyst to prepare epoxy polyether modified silicone oil; s2, the hydroxyethyl piperidine carboxylic acid isobutyl ester aqueous solution, epoxy polyether modified silicone oil and tetramethyl dipropylene triamine are subjected to a reaction in a second solvent and a second catalyst, and the anti-mosquito fabric finishing agent is prepared. The anti-mosquito fabric finishing agent provided by the invention can maintain relatively good softness, moisture and air permeability and skin-friendly hand feeling while endowing a fabric with relatively good anti-mosquito and insect-repelling effects.

Description

Technical Field

[0001] This application relates to the field of fabric finishing agents, and particularly to a mosquito-proof fabric finishing agent, a preparation method thereof, and an application thereof. Background Art

[0002] In leisure time, outdoor activities such as mountain climbing and camping have gradually become the preferred ways for people to adjust their physical and mental states. However, the problem of mosquito breeding in the outdoor environment in summer is particularly prominent. Its harm is not only reflected in the direct troubles such as skin itching caused by biting and sucking blood and disturbing rest, but more importantly, it spreads major infectious diseases such as malaria, dengue fever, epidemic encephalitis B, and lymphatic filariasis, seriously threatening human health and safety. Against this background, the demand for outdoor textiles with multifunctional characteristics such as mosquito prevention and repellent, breathable moisture absorption, and soft skin-friendly has increased significantly.

[0003] The current mainstream mosquito prevention technologies still mainly rely on traditional chemical agents such as mosquito coils and electric mosquito liquids. Although they have advantages such as convenient use and low cost, they generally have problems such as short protection time and the release of volatile toxic substances. Long-term use in a closed space is likely to cause allergic reactions such as sore throat and nasal mucosa irritation, and even lead to nervous system damage. In recent years, although a nano-microcapsule insect-proof finishing agent based on pyrethroids has been developed, which can build a long-lasting repellent film layer on the fabric surface through a fixing agent to achieve the physical mosquito prevention effect of quickly knocking down mosquitoes after contact, such products still face two major technical bottlenecks: First, the water washing resistance is insufficient, and the fastness needs to be improved by relying on cross-linking agents, but this results in the fabric being stiff and hard; Second, it is difficult to have both functional persistence and wearing comfort. How to break through the limitations of existing technologies and develop composite functional fabrics with high-efficiency mosquito prevention, wash durability, and comfortable wearing feeling has become an important research and development direction in the outdoor and home textile fields.

[0004] As the core auxiliary agent for textile post-finishing, polysiloxane-based finishing agents perform excellently in improving the softness and breathability of fabrics. To achieve multifunctional composite finishing, the industry usually adopts multi-process superposition or auxiliary agent compounding processes, but both of these solutions have significant limitations: Multi-process processing greatly increases the consumption of water, electricity, and the discharge of wastewater, and it is no longer sustainable; while the compounding of multiple auxiliary agents requires strict consideration of chemical compatibility, and improper compatibility is likely to cause flocculation and sedimentation, resulting in quality problems such as color spots and uneven hand feeling on the fabric. Developing highly efficient multifunctional monomer rectifying agents to achieve performance synergistic effects through streamlining the process flow is becoming the key path for the industry's development. Summary of the Invention

[0005] The purpose of this application is to provide a finishing agent with mosquito prevention efficacy, and one-step treatment can achieve the effects of softening, hydrophilic moisture absorption, and mosquito prevention of the fabric.

[0006] To achieve the above purpose, the technical solution adopted in this application is: to provide a mosquito-proof fabric finishing agent, whose structural general formula is: Among them, m, x, y, z, a, c, d, e, f are integers, and 34 ≤ m ≤ 37, x is 3 or 4, y is 1 or 2, 17 ≤ z ≤ 21, 5 ≤ a ≤ 8, 10 ≤ c ≤ 15, 2 ≤ d ≤ 4, 6 ≤ e ≤ 8, 18 ≤ f ≤ 20.

[0007] The present application also provides a preparation method of a mosquito-proof fabric finishing agent, including the following steps: S1: Reacting a hydrogen-containing silicone oil, an allyl epoxy-terminated polyether, and an allyl hydroxy-terminated polyether in a first solvent and a first catalyst to obtain an epoxy polyether-modified silicone oil; S2: Reacting an isobutyl hydroxyethylpiperidine carboxylate aqueous solution, the epoxy polyether-modified silicone oil, and tetramethyldipropylenetriamine in a second solvent and a second catalyst to obtain the mosquito-proof fabric finishing agent; the structural formula of the mosquito-proof fabric finishing agent is: Among them, m, x, y, z, a, c, d, e, f are integers, and 34 ≤ m ≤ 37, x is 3 or 4, y is 1 or 2, 17 ≤ z ≤ 21, 5 ≤ a ≤ 8, 10 ≤ c ≤ 15, 2 ≤ d ≤ 4, 6 ≤ e ≤ 8, 18 ≤ f ≤ 20.

[0008] As a preference, the structural formula of the epoxy polyether-modified silicone oil is: Among them, m, x, y, z, a, b, c are integers, and 34 ≤ m ≤ 37, x is 3 or 4, y is 1 or 2, 17 ≤ z ≤ 21, 5 ≤ a ≤ 8, 26 ≤ b ≤ 32, 10 ≤ c ≤ 15.

[0009] As another preference, the number-average molecular weight of the hydrogen-containing silicone oil is 5000 - 6000.

[0010] As another preference, the number-average molecular weight of the allyl epoxy-terminated polyether is 250 - 300.

[0011] As another preference, the number-average molecular weight of the allyl hydroxy-terminated polyether is 800 - 1000.

[0012] As another preference, by mass, the specific operation of step S1 is: adding 500 - 600 parts of the hydrogen-containing silicone oil, 650 - 960 parts of the allyl epoxy-terminated polyether, and 400 - 800 parts of the allyl hydroxy-terminated polyether into a reaction kettle equipped with a stirrer, a condensing reflux device, and a thermometer, and adding 665 - 1000 parts of the first solvent and 10 - 12 parts of a 2% chloroplatinic acid-isopropanol solution, heating to 90 - 100 °C, and holding for 5 - 8 hours to obtain the epoxy polyether-modified silicone oil.

[0013] As another preference, by mass parts, the step S2 is specifically as follows: adding 588 - 654 parts of an aqueous solution of isobutyl hydroxyethylpiperidine carboxylate with a content of 70% and 2215 - 3360 parts of the epoxy polyether modified silicone oil into a reaction kettle equipped with a stirrer, a condensing reflux device and a thermometer, adding 460 - 670 parts of diethylene glycol monobutyl ether as the second solvent and 15 - 33 parts of triethylamine as the second catalyst, heating to 100 - 110°C, keeping warm for 8 - 12 hours, then cooling to 80 - 85°C, adding 112 - 150 parts of the tetramethyldipropylenetriamine, and keeping warm for 5 - 8 hours to obtain the mosquito - repellent fabric finishing agent.

[0014] Further preferably, the first solvent is diethylene glycol monobutyl ether or dipropylene glycol.

[0015] The present application also provides a mosquito - repellent fabric finishing agent product, which is characterized by comprising the following raw materials in mass parts: 150 - 250 parts of water, 1 - 5 parts of glacial acetic acid, and 90 - 110 parts of the above - mentioned mosquito - repellent fabric finishing agent, or a mosquito - repellent fabric finishing agent prepared by the above - mentioned preparation method.

[0016] Compared with the prior art, the beneficial effects of the present application are as follows:

[0017] (1) The mosquito - repellent fabric finishing agent provided by the present application can endow the fabric with good mosquito - repellent and insect - repellent effects, and still maintain the effects after being washed 10 times.

[0018] (2) The fabric treated with the mosquito - repellent fabric finishing agent provided by the present application takes into account softness, moisture permeability and air permeability, and skin - friendly feel, and can still maintain these properties after being washed. Specific Embodiments

[0019] Next, in combination with specific embodiments, the present application will be further described. It should be noted that, on the premise of no conflict, the following - described embodiments or technical features can be combined arbitrarily to form new embodiments.

[0020] The terms "comprising" and "having" in the specification and claims of the present application and any variations thereof are intended to cover non - exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily limit to those clearly listed steps or units, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0021] The present application provides a mosquito - repellent fabric finishing agent, and its structural general formula is: Wherein m, x, y, z, a, c, d, e, f are integers, and 34 ≤ m ≤ 37, x is 3 or 4, y is 1 or 2, 17 ≤ z ≤ 21, 5 ≤ a ≤ 8, 10 ≤ c ≤ 15, 2 ≤ d ≤ 4, 6 ≤ e ≤ 8, 18 ≤ f ≤ 20.

[0022] This application introduces isobutyl hydroxyethylpiperidine carboxylate into the structure of the mosquito repellent fabric finishing agent, coordinates it with the molecular chain of polysiloxane, and forms a continuous and stable protective film layer on the surface of the fabric fiber. This film layer not only has excellent mechanical strength and moisture permeability, but also can effectively block the diffusion of odor substances such as lactic acid and volatile amines in human sweat through molecular-level dense coverage, and significantly reduce the chemical signal intensity on which mosquitoes rely to locate hosts.

[0023] Different from the toxicity mechanism of traditional chemical mosquito repellents that directly act on the nervous system of insects, the technology of this application realizes non-toxic long-term mosquito repellent protection through the dual action paths of physical shielding and odor interference of the fabric, and develops an environmentally friendly functional textile finishing agent on the premise of ensuring comfortable wearing.

[0024] In addition, two functional chain segments of polysiloxane and polyether are simultaneously and coordinately introduced into the structure of the mosquito repellent fabric finishing agent of this application. The flexible molecular conformation of polysiloxane can significantly improve the soft touch of the product, while the hydrophilic groups in the polyether chain segment achieve efficient moisture management through hydrogen bond interaction, enabling the product to have the dual advantages of smooth texture and rapid moisture absorption and perspiration, and having important applications in the development of high-end textiles.

[0025] The mosquito repellent fabric finishing agent of this application realizes the integration of multiple functions through innovative molecular structure design, and can endow the fabric with triple properties by treating the clothing once. First, the soft chain segment forms a uniform coating layer on the fabric surface, significantly improving the smooth and skin-friendly touch of the fabric. Secondly, the hydrophilic group network constructs a rapid moisture conduction channel to ensure timely adsorption and evaporation of sweat and maintain the dry and comfortable wearing of the clothing. Finally, a dense film is formed on the fabric surface to cover the human odor and interfere with the chemical perception ability of mosquitoes.

[0026] The mosquito repellent finishing agent technology of this application can not only break through the compatibility limitations of the compounding of various auxiliaries in traditional processes, but also significantly reduce the consumption of water and electricity and the discharge of wastewater by streamlining the processing procedures, reducing the environmental load while improving production efficiency.

[0027] In particular, introducing silicon hydride groups and epoxy groups into the product structure of the mosquito repellent finishing agent of this application can form a stable bonding effect with the fabric components, enhancing the fixing fastness and mosquito repellent persistence of the functional components on the fabric surface.

[0028] This application also provides a preparation method of a mosquito repellent finishing agent, including the following preparation steps, by mass:

[0029] S1: Place 500 - 600 parts of hydrogen-containing silicone oil, 650 - 960 parts of allyl epoxy-terminated polyether, and 400 - 800 parts of allyl hydroxy-terminated polyether into a reaction vessel. Then add a first solvent and a first catalyst, raise the temperature for reaction and keep it warm for a period of time to obtain epoxy polyether-modified silicone oil.

[0030] S2: Place 588 - 654 parts of an aqueous solution of isobutyl 4-(2-hydroxyethyl)piperidine-1-carboxylate and 2215 - 3360 parts of epoxy polyether-modified silicone oil into a reaction vessel. Then add a second solvent and a second catalyst, raise the temperature for reaction and keep it warm continuously for a period of time. Then add 112 - 150 parts of tetramethyldipropylenetriamine to the vessel and keep it warm for a period of time to prepare the mosquito repellent finishing agent of the present application.

[0031] The present application also provides chemical reaction formulas for reference. The reaction formula for the formation of epoxy polyether-modified silicone oil by the reaction of hydrogen-containing silicone oil, allyl epoxy-terminated polyether, and allyl hydroxy-terminated polyether in step S1 is: Where m, n, x, y, z, a, b, c are integers, and 34 ≤ m ≤ 37, 41 ≤ n ≤ 55, x is 3 or 4, y is 1 or 2, 17 ≤ z ≤ 21, 5 ≤ a ≤ 8, 26 ≤ b ≤ 32, 10 ≤ c ≤ 15.

[0032] The reaction formula for isobutyl 4-(2-hydroxyethyl)piperidine-1-carboxylate, epoxy polyether-modified silicone oil, and tetramethyldipropylenetriamine in step S2 is: Where m, x, y, z, a, b, c, d, e, f are integers, and 34 ≤ m ≤ 37, x is 3 or 4, y is 1 or 2, 17 ≤ z ≤ 21, 5 ≤ a ≤ 8, 26 ≤ b ≤ 32, 10 ≤ c ≤ 15, 2 ≤ d ≤ 4, 6 ≤ e ≤ 8, 18 ≤ f ≤ 20.

[0033] The present application first introduces epoxy-terminated polyether and hydroxy-terminated polyether into hydrogen-containing silicone oil by hydrosilylation reaction. Then, the reaction of hydroxyl groups and epoxy groups is carried out under the action of a catalyst. Then, isobutyl 4-(2-hydroxyethyl)piperidine-1-carboxylate is introduced and compounded with the polysiloxane chain segment. After treating the fabric, a dense film can be formed on the fabric surface. After wearing, the odor emitted by the human body can be covered by the shielding effect, preventing mosquitoes from perceiving the presence of the human body through the odor, and endowing the clothing product with the efficacy of repelling mosquitoes.

[0034] The mosquito repellent fabric finishing agent of the present application also utilizes the epoxy curing mechanism to introduce amino groups into the product structure. After treating the fabric, excellent softness and moisture absorption comfort effects can be imparted to the fabric through a single finishing and softening process. When the silicon hydride groups and epoxy groups in the product structure treat the fabric, they can form a more stable binding force with the fabric, improving the moisture absorption performance and mosquito repellent effect of the fabric.

[0035] In some embodiments, the number-average molecular weight of the hydrogen-containing silicone oil is 5,000 to 6,000, the number-average molecular weight of the allyl epoxy-terminated polyether is 250 to 300, and the number-average molecular weight of the allyl hydroxy-terminated polyether is 800 to 1,000.

[0036] In some embodiments, the first solvent is diethylene glycol monobutyl ether or dipropylene glycol, and the first catalyst is a 2% chloroplatinic acid-isopropanol solution; the second solvent is diethylene glycol monobutyl ether, and the second catalyst is triethylamine.

[0037] The present application provides a specific preparation procedure for a mosquito repellent fabric finishing agent. By mass:

[0038] S1: Add 500 - 600 parts of hydrogen-containing silicone oil, 650 - 960 parts of allyl epoxy-terminated polyether, and 400 - 800 parts of allyl hydroxy-terminated polyether into a reaction kettle equipped with a stirrer, a condensing reflux device, and a thermometer. Then add 665 - 1000 parts of solvent and 10 - 12 parts of a 2% chloroplatinic acid-isopropanol solution. Heat up to 90 - 100 °C and keep warm for 5 - 8 hours to obtain epoxy polyether-modified silicone oil.

[0039] S2: Add 588 - 654 parts of an aqueous solution of isobutyl 70% hydroxyethylpiperidine carboxylate and 2215 - 3360 parts of epoxy polyether-modified silicone oil into a reaction kettle equipped with a stirrer, a condensing reflux device, and a thermometer. Add 460 - 670 parts of diethylene glycol monobutyl ether as the solvent and 15 - 33 parts of triethylamine as the catalyst. Heat up to 100 - 110 °C, keep warm for 8 - 12 hours, then cool down to 80 - 85 °C, add 112 - 150 parts of tetramethyldipropylenetriamine, and keep warm for 5 - 8 hours to obtain the mosquito repellent fabric finishing agent of the present application.

[0040] The present application also provides an application of the mosquito repellent fabric finishing agent, that is, a mosquito repellent fabric finishing agent product, which includes 90 - 110 parts by mass of the above-mentioned mosquito repellent fabric finishing agent, 150 - 250 parts by mass of water, and 1 - 5 parts by mass of glacial acetic acid.

[0041] Example 1

[0042] Prepare a mosquito repellent fabric finishing agent according to the following preparation procedure, by mass fraction:

[0043] S1: Add 500 parts of hydrogen-containing silicone oil with a number-average molecular weight of 5,000, 650 parts of allyl epoxy-terminated polyether with a number-average molecular weight of 250, and 400 parts of allyl hydroxy-terminated polyether with a number-average molecular weight of 800 into a reaction kettle equipped with a stirrer, a condensing reflux device, and a thermometer. Then add 665 parts of diethylene glycol monobutyl ether and 10 parts of a 2% chloroplatinic acid-isopropanol solution. Heat up to 100 °C and keep warm for 6 hours to obtain epoxy polyether-modified silicone oil.

[0044] S2: Add 588 parts of an aqueous solution of isobutyl hydroxyethylpiperidinecarboxylate with a 70% content and 2215 parts of epoxy polyether modified silicone oil into a reaction kettle equipped with a stirrer, a condensing reflux device, and a thermometer. Then add 470 parts of diethylene glycol monobutyl ether as a solvent and 15 parts of triethylamine catalyst. Heat up to 110 °C, keep the temperature for 10 hours, then cool down to 85 °C, add 112 parts of tetramethyldipropylenetriamine, and keep the temperature for 6 hours to obtain a mosquito repellent fabric finishing agent.

[0045] Example 2

[0046] In step S1, select a hydrogen-containing silicone oil with a number average molecular weight of 6000, adjust the addition amount of the hydrogen-containing silicone oil to 600 parts by mass, and adjust the addition amount of diethylene glycol monobutyl ether to 707 parts by mass. Adjust the addition amount of the 2% chloroplatinic acid-isopropanol solution to 12 parts by mass;

[0047] In step S2, adjust the addition amount of the epoxy polyether modified silicone oil to 2357 parts by mass, and adjust the addition amount of diethylene glycol monobutyl ether to 460 parts by mass;

[0048] Other preparation steps are the same as those in Example 1.

[0049] Example 3

[0050] In step S1, adjust the addition amount of allyl epoxy-terminated polyether to 800 parts by mass, and adjust the addition amount of diethylene glycol monobutyl ether to 771 parts by mass; in step S2, adjust the addition amount of the epoxy polyether modified silicone oil to 2571 parts by mass, and adjust the addition amount of diethylene glycol monobutyl ether to 526 parts by mass; other preparation steps are the same as those in Example 2.

[0051] Example 4

[0052] In step S1, select a number average molecular weight of 300 for the allyl epoxy-terminated polyether, adjust the addition amount to 780 parts by mass, and adjust the addition amount of diethylene glycol monobutyl ether to 760 parts by mass; in step S2, adjust the addition amount of the epoxy polyether modified silicone oil to 2540 parts by mass, and adjust the addition amount of diethylene glycol monobutyl ether to 480 parts by mass; other preparation steps are the same as those in Example 2.

[0053] Example 5

[0054] In step S1, adjust the addition amount of allyl epoxy-terminated polyether to 960 parts by mass, and adjust the addition amount of diethylene glycol monobutyl ether to 840 parts by mass; in step S2, adjust the addition amount of the epoxy polyether modified silicone oil to 2800 parts by mass, and adjust the addition amount of diethylene glycol monobutyl ether to 565 parts by mass; other preparation steps are the same as those in Example 4.

[0055] Example 6

[0056] Adjust the addition amount of allyl epoxy-terminated polyether in step S1 to 800 parts by mass, and adjust the addition amount of diethylene glycol monobutyl ether to 771 parts by mass; adjust the addition amount of epoxy polyether-modified silicone oil in step S2 to 2571 parts by mass, and adjust the addition amount of diethylene glycol monobutyl ether to 526 parts by mass; keep other preparation steps the same as those in Example 2.

[0057] Example 7

[0058] Select the number-average molecular weight of allyl hydroxy-terminated polyether in step S1 to be 1000, and adjust the addition amount to 500 parts by mass, and adjust the addition amount of diethylene glycol monobutyl ether to 750 parts by mass; adjust the addition amount of epoxy polyether-modified silicone oil in step S2 to 2500 parts by mass, and adjust the addition amount of diethylene glycol monobutyl ether to 515 parts by mass; keep other preparation steps the same as those in Example 2.

[0059] Example 8

[0060] Adjust the addition amount of allyl hydroxy-terminated polyether in step S1 to 800 parts by mass, and adjust the addition amount of diethylene glycol monobutyl ether to 878 parts by mass; adjust the addition amount of epoxy polyether-modified silicone oil in step S2 to 2928 parts by mass, and adjust the addition amount of diethylene glycol monobutyl ether to 586 parts by mass; keep other preparation steps the same as those in Example 7.

[0061] Example 9

[0062] Adjust the addition amount of isobutyl 4-hydroxyethylpiperidinecarboxylate aqueous solution in step S2 to 654 parts by mass, adjust the addition amount of diethylene glycol monobutyl ether to 538 parts by mass, and adjust the addition amount of triethylamine to 25 parts by mass; keep other preparation steps the same as those in Example 6.

[0063] Example 10

[0064] Adjust the heat preservation time of S1 to 8 hours, and keep other preparation steps the same as those in Example 9.

[0065] Example 11

[0066] Replace 771 parts by mass of diethylene glycol monobutyl ether in step S1 with 771 parts by mass of dipropylene glycol; keep other preparation steps the same as those in Example 9.

[0067] Example 12

[0068] Adjust the heat preservation time of S2 to 8 hours, and keep other preparation steps the same as those in Example 9.

[0069] Comparative Example 1

[0070] Replace isobutyl hydroxyethylpiperidine carboxylate in Step S2 with the corresponding mass parts of polyetheramine D230, and keep the other preparation steps the same as those in Example 9.

[0071] Comparative Example 2

[0072] Purchase the commercially available hydrophilic silicone softener RH-NB-8298-3.

[0073] Comparative Example 3

[0074] Purchase the commercially available mosquito repellent and anti-mosquito finishing agent PL-120, the main component of which is pyrethroid compounds.

[0075] Emulsify the mosquito repellent fabric finishing agents of the above examples and comparative examples and then treat the fabric according to the following steps:

[0076] Emulsification step: By mass, emulsify 100 mass parts of the mosquito repellent fabric finishing agents of the above examples or comparative examples, 200 mass parts of water and 2 mass parts of glacial acetic acid in a homogenizing emulsifier to obtain the emulsion of the product of the present application.

[0077] Finishing step: Immerse the cotton fabric in the working solution, the working solution is the emulsion of the product of the present application at 60 g / L, the squeezing rate is 80%, pre-bake for 45 - 60 s, set the temperature at 170 °C, and evaluate the fabric performance after 1 hour of moisture regain.

[0078] Fabric performance evaluation:

[0079] 1. Softness test: According to GB / T18318 "Textiles - Determination of fabric bending length": Place a long strip sample on a platform, press a ruler on the sample, and the long axis of the sample is parallel to the length direction of the ruler. Move the ruler and the long axis direction of the sample on the platform at the same time so that the part of the sample extending out of the platform is suspended and bends under its own weight. When the head end of the sample bending downward touches an inclined plane at 41.5 °C with the horizontal, 1 / 2 of the extended length of the sample is the bending length. The bending stiffness of the sample is calculated from the bending length and the mass per unit area.

[0080] Sample: 6 pieces each of warp-knitted and weft-knitted samples of 25 mm * 25 mm, measure each sample 4 times, and take the average value;

[0081] Bending stiffness calculation: G = mC 3 10 -2

[0082] In the formula: G - bending stiffness per unit width, mN·cm;

[0083] m - mass per unit area of the sample, g / m 2 ;

[0084] C——Average bending length of the specimen, cm

[0085] 2. Evaluation test of mosquito repellent effect: Refer to GB / T 30126-2013 "Testing and Evaluation of Mosquito Repellent Performance of Textiles" to test the mosquito repellent effect of the fabric. The mosquito repellent rate R is used to represent the mosquito repellent effect. The larger the value, the better the repellent effect.

[0086] 3. Evaluation test of moisture permeability: It is determined according to GB / T 12704.1-2009 "Test Method for Moisture Permeability of Textiles - Part 1: Moisture Absorption Method". The moisture permeability rate WVT value is characterized. The larger the value, the better the moisture permeability of the fabric.

[0087] 4. Wash fastness rating test: Wash according to GB / T 8629—2017 "Domestic Washing and Drying Procedures for Textile Testing", and test its moisture permeability and mosquito repellent effect.

[0088] 5. Handfeel evaluation test: It is evaluated by the method of touching by hand, and the comprehensive handfeel is evaluated. The 1-5 point judgment method is adopted, with 1 point being the worst and 5 points being the best. 10 people evaluate simultaneously and take the average value.

[0089] 6. Hydrophilicity evaluation test: Use a standard dropper with 25 drops / mL to drop a drop of water from a height of 2 cm from the fabric surface, and test the time used for the fabric to absorb water completely under static conditions. Drop it more than 3 times at different positions and take the average value.

[0090] Record the results of the softness evaluation test, mosquito repellent effect evaluation test, moisture permeability evaluation test, hydrophilicity evaluation test and handfeel evaluation test in Table 1 below.

[0091] Table 1 Performance evaluation results of finishing agents in each example and comparative example on cotton fabrics Project Flexural rigidity / mN·cm Repellency rate R / % <![CDATA[Water vapor transmission rate / g / m 2 .24h]]> Hydrophilicity / s Hand feeling / score Original fabric 49.21 0 2473 <2s 1 Example 1 14.25 70.21 3098 1.58 3～4 Example 2 11.77 70.30 2970 1.44 4 Example 3 15.39 71.21 3075 1.67 3～4 Example 4 12.51 70.78 2997 1.45 3～4 Example 5 16.22 70.12 3176 1.31 3 Example 6 8.89 71.54 3196 2.25 5 Example 7 14.48 68.21 3318 <1 3～4 Example 8 16.67 65.30 3497 <1 3 Example 9 9.78 79.54 3219 2.31 4～5 Example 10 9.64 78.81 3181 2.01 4～5 Example 11 9.38 79.70 3208 2.11 4～5 Example 12 9.79 78.51 3211 1.97 4～5 Comparative example 1 8.62 0 2969 2.94 5 Comparative example 2 9.84 0 2762 <1 4～5 Comparative example 3 63.97 99.9 1365 >10 <1

[0092] It can be easily seen from the test results in Table 1 that the mosquito repellent fabric finishing agent prepared in this application can significantly improve the mosquito repellent rate of cotton fabrics, and at the same time can ensure that the fabric is soft and breathable, with a good handfeel.

[0093] Analyze the performance test results of Examples 9 - 12. The finishing agents prepared by changing the reaction time or replacing the reaction solvent have little effect on the performance of the treated fabric. The reason may be that the fabric finishing agent in this application has fully reacted within a certain time to obtain a good finishing agent effect.

[0094] Analyze the fabric test results of Examples 2, 7 and 8. Increasing the molecular weight or dosage of allyl hydroxy-terminated polyether can improve the moisture absorption performance of the fabric after being treated with the finishing agent product, but it has a certain impact on the handfeel.

[0095] Analyzing Example 6 and Example 9, increasing the usage amount of isobutyl hydroxyethylpiperidine carboxylate can enhance the mosquito repellent effect of the finishing agent product, but excessive dosage will still lead to a decline in the fabric handfeel.

[0096] Compared with some commercially available hydrophilic finishing agents and mosquito repellent finishing agents, the fabric finishing agent of the present application can ensure the softness, hydrophilicity, moisture permeability and air permeability of the fabric while achieving the mosquito repellent effect.

[0097] Measure the mosquito repellent effect, moisture permeability, softness and handfeel of the cotton fabric after 10 times of washing, compare the test results with the original fabric, and record them in Table 2 below.

[0098] Table 2 Performance test results of the fabric after 10 times of washing

[0099] The fabric treated with the mosquito repellent fabric finishing agent product of the present application has good washing resistance. After 10 times of washing, it can still maintain good mosquito repellent effect and softness, and its handfeel, moisture permeability and air permeability are better than those of the original fabric.

[0100] The mosquito repellent finishing agent product of the present application has multiple effects with one agent. After treating the fabric, it can endow the fabric with excellent softness, hygroscopicity and mosquito repellent effect. It is not easy to cause conflicts when compounded with other auxiliaries, and the fabric treatment steps are efficient, time-saving, water-saving and reduce the environmental protection pressure.

[0101] The above describes the basic principle, main features and advantages of the present application. Those skilled in the art of this industry should understand that the present application is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present application. Without departing from the spirit and scope of the present application, the present application will have various changes and improvements, and these changes and improvements all fall within the scope of the present application claimed. The scope of protection required by the present application is defined by the appended claims and their equivalents.

Claims

1. A mosquito-proof fabric finishing agent, characterized in that: Its general structural formula is: Wherein m, x, y, z, a, c, d, e, f are integers, and 34≤m≤37, x is 3 or 4, y is 1 or 2, 17≤z≤21, 5≤a≤8, 10≤c≤15, 2≤d≤4, 6≤e≤8, 18≤f≤20.

2. A method for preparing a mosquito-proof fabric finishing agent, characterized in that: The following steps are involved: S1: reacting hydrogen-containing silicone oil, allyl epoxy-terminated polyether, and allyl hydroxyl-terminated polyether in a first solvent and a first catalyst to obtain epoxy polyether-modified silicone oil; S2: reacting an aqueous solution of hydroxyethylpiperidinecarboxylic acid isobutyl ester, the epoxy polyether modified silicone oil, and tetramethyldipropylenetriamine in a second solvent and a second catalyst to prepare the mosquito-proof fabric finishing agent; The structural formula of the mosquito-proof fabric finishing agent is: Wherein m, x, y, z, a, c, d, e, f are integers, and 34≤m≤37, x is 3 or 4, y is 1 or 2, 17≤z≤21, 5≤a≤8, 10≤c≤15, 2≤d≤4, 6≤e≤8, 18≤f≤20.

3. The preparation method according to claim 2, characterized in that: The structural formula of the epoxy polyether modified silicone oil is: Wherein m, x, y, z, a, b, c are integers, and 34≤m≤37, x is 3 or 4, y is 1 or 2, 17≤z≤21, 5≤a≤8, 26≤b≤32, and 10≤c≤15.

4. The preparation method according to claim 2, characterized in that: The number average molecular weight of the hydrogen-containing silicone oil is 5000-6000.

5. The preparation method according to claim 2, characterized in that: The number average molecular weight of the allyl epoxy terminated polyether is 250-300.

6. The preparation method according to claim 2, characterized in that: The number average molecular weight of the allyl hydroxyl terminated polyether is 800-1000.

7. The preparation method according to claim 2, characterized in that: In parts by mass, the S1 step is specifically as follows: 500-600 parts of the hydrogenated silicone oil, 650-960 parts of the allyl epoxy-terminated polyether and 400-800 parts of the allyl hydroxy-terminated polyether are added to a reaction kettle equipped with an agitator, a condenser reflux and a thermometer, 665-1000 parts of the first solvent and 10-12 parts of a 2% chloroplatinic acid-isopropanol solution are added, the temperature is raised to 90-100° C., and the temperature is kept for 5-8 hours to obtain the epoxy polyether modified silicone oil.

8. The preparation method according to claim 2, characterized in that: In parts by mass, the S2 step is specifically as follows: 588 to 654 parts of a 70% aqueous solution of hydroxyethyl piperidine carboxylic acid isobutyl ester and 2215 to 3360 parts of the epoxy polyether modified silicone oil are added to a reaction kettle equipped with an agitator, a condenser reflux and a thermometer, and 460 to 670 parts of diethylene glycol monobutyl ether are added as the second solvent and 15 to 33 parts of triethylamine are added as the second catalyst, the temperature is raised to 100 to 110° C., and after keeping the temperature for 8 to 12 hours, the temperature is lowered to 80 to 85° C., 112 to 150 parts of the tetramethyldipropylenetriamine are added, and the temperature is kept for 5 to 8 hours to obtain the mosquito repellent fabric finishing agent.

9. The preparation method according to claim 2, characterized in that: The first solvent is diethylene glycol monobutyl ether or dipropylene glycol.

10. A mosquito-proof fabric finishing agent product, characterized in that: The invention comprises the following raw materials in parts by weight: 150 to 250 parts by weight of water, 1 to 5 parts by weight of glacial acetic acid, and 90 to 110 parts by weight of the mosquito-proof fabric finishing agent according to claim 1, or the mosquito-proof fabric finishing agent prepared by the preparation method according to claims 2 to 9.

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