A mosquito repellent and insect repellent coating finishing agent and its application on outdoor tent fabrics

Abstract

The present invention belongs to the technical field of coating finishing agents, and relates to a mosquito repellent and insecticide coating finishing agent and its application on outdoor tent fabrics. The coating finishing agent comprises a mosquito repellent modifier containing a silicon-hydrogen bond, pyrethrin, a double-terminal vinyl silicone oil, and a polyvinyl silicone oil; the mosquito repellent modifier containing a silicon-hydrogen bond is obtained by reacting a hydrogen-containing silicone oil with a mosquito repellent substance containing a double bond, and the molar ratio of ‑C=C‑ to ‑Si‑H is precisely controlled during the reaction, and the hydrogen atoms of the hydrogen-containing silicone oil are located in the side chain; application: the coating finishing agent is applied to the surface of the tent fabric, and an outdoor tent fabric with mosquito repellent and insecticide functions is obtained after a thermal reaction. Compared with the traditional physical blending method, the present invention adopts a covalent reaction to introduce mosquito repellent and insecticide substances, which effectively solves the problems of poor durability and easy migration and precipitation of active ingredients, and improves the comfort and safety of outdoor camping.

Description

Technical Field

[0001] The invention belongs to the technical field of coating finishing agents, and relates to a mosquito-repellent and insect-removing coating finishing agent and application thereof to outdoor tent fabrics. Background Art

[0002] In recent years, with the rise of outdoor leisure and entertainment activities, the demand for tent fabrics for outdoor camping has increased significantly. As an important equipment in camping activities, tents not only need to have physical properties such as high strength and UV resistance, but also need to have mosquito repellent, insect repellent and waterproof functions according to the complexity of the outdoor camping environment and the variability of the climate. Especially in spring and summer, when mosquitoes and insects are active frequently, the development of tent fabrics with excellent mosquito and insect repellent effects is of great significance to improving the comfort and safety of outdoor camping.

[0003] At present, there are many mosquito repellent and insect finishing agents used in fabric processing. For example, patent application CN116219746A discloses a bio-based mosquito repellent finishing agent, which contains ingredients such as pyrethrin, pyrethrin, bio-based emulsifier, polyol, polyurethane and deionized water. The finishing agent is applied to the fabric by dipping or padding, which can give the fabric a certain mosquito repellent performance. However, although this physical blending method can achieve a certain mosquito and insect repellent effect, the active ingredients such as pyrethrin and pyrethrin have poor durability on the fabric and are easy to migrate and precipitate, affecting the durability of mosquito repellent and insect removal. Summary of the invention

[0004] The purpose of the present invention is to solve the problems existing in the prior art and provide a mosquito and insect repellent coating finishing agent and its application on outdoor tent fabrics.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A mosquito repellent and insecticide coating finishing agent, comprising, by weight, 1-2 parts of a mosquito repellent modifier containing a silicon-hydrogen bond, 1-2 parts of pyrethrin, 90-100 parts of a double-terminal vinyl silicone oil, 3-5 parts of a polyvinyl silicone oil, 1.0-2.0 parts of a Karstedt catalyst, and 0.1-0.2 parts of an inhibitor;

[0007] The mosquito repellent modifier containing silicon-hydrogen bonds is obtained by reacting hydrogen-containing silicone oil with a mosquito repellent substance containing double bonds. During the reaction, the molar ratio of -C=C- to -Si-H is 0.2-0.4:1. The hydrogen atoms of the hydrogen-containing silicone oil are located in the side chain, and the purpose is to connect the mosquito repellent substance containing double bonds to the side chain.

[0008] The present invention intends to introduce mosquito repellent and insecticide (pyrethrin) into the coating by covalent reaction, so as to solve the problem of introducing mosquito repellent and insecticide into the coating by physical blending in the prior art. To this end, it is necessary to design the formula of the mosquito repellent and insecticide coating finishing agent so that the mosquito repellent and insecticide can covalently react with other components under specific conditions.

[0009] Since hydrogen-containing silicone oil and vinyl silicone oil have the advantage of being able to initiate silane-hydrogen addition bonding through heat, the present invention selects hydrogen-containing silicone oil and vinyl silicone oil as substances that undergo covalent reactions with mosquito-repellent substances and insect-removing substances, but hydrogen-containing silicone oil and vinyl silicone oil are both non-polar materials, and mosquito-repellent substances and insect-removing substances are polar materials, and they are difficult to be compatible with each other, and compatibility is a key prerequisite for covalent modification of composite materials. To this end, the present invention first introduces polar mosquito-repellent substances on the side chains of non-polar hydrogen-containing silicone oils to obtain mosquito-repellent modifiers containing silicon-hydrogen bonds, and then compounding the mosquito-repellent modifiers with insect-removing substances, vinyl silicone oils, etc. to prepare mosquito-repellent and insect-removing coating finishing agents, and utilizing the mosquito-repellent modifiers containing silicon-hydrogen bonds that are a combination of non-polar and polar as a compatibilizer to achieve good compatibility between the components.

[0010] The degree of volume expansion of the mosquito repellent modifier containing silicon-hydrogen bonds mainly depends on the molar ratio of -C=C- to -Si-H during the reaction. If the molar ratio of -C=C- to -Si-H is too large, there will be few remaining silicon-hydrogen bonds, few reaction sites participating in the subsequent coating polymerization, and insufficient coating strength. If the molar ratio of -C=C- to -Si-H is too small, the number of polar side chains is small and the volume expansion effect is poor. Therefore, the present invention controls the molar ratio of -C=C- to -Si-H during the reaction to be 0.2-0.4:1.

[0011] As the preferred technical solution:

[0012] The preparation process of the mosquito repellent modifier containing silicon-hydrogen bonds is as follows: 5-10 parts of hydrogen-containing silicone oil and 4-20 parts of mosquito repellent substances containing double bonds are added into a reaction kettle by weight, and after heating to 100-110° C., 2-3 parts of Karstedt catalyst are added under stirring conditions, and after heating to 120-135° C., the reaction is carried out for 3-5 hours to obtain the mosquito repellent modifier containing silicon-hydrogen bonds.

[0013] In the mosquito and insect repellent coating finishing agent as described above, the hydrogen content of the hydrogen-containing silicone oil is 0.8-1.6wt%.

[0014] The preparation process of the mosquito repellent coating finishing agent containing double bonds is as follows: first, 15-25 parts of hydroxycitronellal and 5-10 parts of silane coupling agent are added into a reaction bottle by weight, and then acetic acid is added to adjust the pH value of the system to 4-5, and the reaction is carried out at 60-70°C for 6-8h, and the mosquito repellent containing double bonds is obtained through post-treatment (neutralization with ammonia water, washing with ethanol, purification, and drying).

[0015] In the above-mentioned mosquito repellent and insecticide coating finishing agent, the silane coupling agent is vinyl trimethoxy silane, vinyl tri (2-methoxyethoxy) silane or γ-methacryloxypropyl trimethoxy silane.

[0016] In the above-mentioned mosquito repellent and insecticide coating finishing agent, the vinyl content of the double-terminal vinyl silicone oil is 0.05-0.43wt%, and the general structural formula is: CH2=CH(CH3)2Si-O-[(CH3)2Si-O] n Si(CH3)2CH=CH2, where n=200-3000.

[0017] In the mosquito repellent and insecticide coating finishing agent as described above, the polyvinyl silicone oil is a vinyl silicone oil containing double bonds in both the end group and the side chain, and the vinyl content is 8-12wt%.

[0018] The mosquito repellent and insecticide coating finishing agent as described above further comprises 10-40 parts of white carbon black by weight.

[0019] In the above-mentioned mosquito repellent and insecticide coating finishing agent, the inhibitor is 2-phenyl-3-butyn-2-ol or 2-methyl-3-butyn-2-ol.

[0020] The present invention also provides an application of a mosquito repellent and insecticide coating finishing agent as described in any of the above items. After the mosquito repellent and insecticide coating finishing agent is mixed evenly, it is injection-coated on the surface of a tent fabric substrate, the coating thickness is controlled to be 0.8-1.2 mm, and the reaction is carried out at 90-100° C. for 8-10 minutes to obtain an outdoor tent fabric with mosquito repellent and insecticide function; the outdoor tent fabric with mosquito repellent and insecticide function has a water contact angle of 118-130°, a repellency rate of more than 99.8%, and a repellency rate of more than 95.5% after washing 10 times.

[0021] Beneficial effects:

[0022] (1) The present invention introduces mosquito and insect repellent substances into the coating through a covalent reaction, thereby solving the problem of easy migration and precipitation of mosquito and insect repellent substances and poor durability in the prior art, and achieving long-lasting and stable mosquito and insect repellent functions.

[0023] (2) The raw materials used in the present invention do not contain any organic solvents, and the product does not contain VOCs, has good environmental friendliness, and meets the sustainable development requirements of the industry.

[0024] (3) The outdoor tent fabric with mosquito and insect repellent function prepared by using the mosquito and insect repellent coating finishing agent of the present invention has excellent hydrophobicity and antifouling properties. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the structural formula of the mosquito repellent modifier containing silicon-hydrogen bonds of Example 1;

[0026] Figure 2 is the structural formula of pyrethrin;

[0027] Figure 3 It is the structural formula of hydroxycitronellal. DETAILED DESCRIPTION

[0028] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0029] The following are the test methods for the relevant performance indicators in each embodiment and comparative example:

[0030] Water contact angle: At 25°C, the water contact angle of the surface of the test sample was measured using an OCA200 contact angle goniometer and a sessile drop method.

[0031] Avoidance rate: Place the test sample and blank sample (i.e. tent fabric substrate, the same size as the test sample) with a size of 20cm×20cm in glass boxes with a size of 50cm×50cm×50cm respectively. There are 100 white Aedes mosquitoes in each glass box. Record the number of mosquitoes landing on the surface of the test sample and blank sample within 2 minutes, and then calculate the avoidance rate according to the following formula:

[0032] Avoidance rate = (number of landings on the blank sample surface - number of landings on the sample surface) / number of landings on the blank sample surface × 100%.

[0033] Washing: Follow the 4N procedure in GB / T 8629-2017 "Textiles—Household Washing and Drying Procedure for Testing". After washing, hang to dry.

[0034] Example 1

[0035] A method for preparing an outdoor tent fabric with mosquito and insect repellent functions, the specific steps are as follows:

[0036] (1) Preparation of raw materials;

[0037] Hydroxycitronellal (structural formula: Figure 3shown);

[0038] Silane coupling agent: vinyltrimethoxysilane;

[0039] Acetic acid;

[0040] Hydrogen-containing silicone oil: The manufacturer is Shanghai Guiyou New Material Technology Co., Ltd., the hydrogen content is 0.8wt%, and the hydrogen atoms are located in the side chain;

[0041] Karstedt catalyst: The manufacturer is Shanghai Sibao High-tech Materials Co., Ltd., the brand is Pt-50S;

[0042] Pyrethrin: CAS number is 121-29-9, structural formula is as follows Figure 2 As shown;

[0043] Double-terminated vinyl silicone oil: The manufacturer is Shanghai Guiyou New Material Technology Co., Ltd., the vinyl content is 0.05wt%, and the structural formula is CH2=CH(CH3)2Si-O-[(CH3)2Si-O] 3000 Si(CH3)2CH=CH2;

[0044] Polyvinyl silicone oil: that is, vinyl silicone oil with double bonds in both the end group and the side chain. The manufacturer is Shanghai Guiyou New Materials Technology Co., Ltd., and the vinyl content is 8wt%;

[0045] White carbon black: manufacturer is Evonik Industries, product number is R972;

[0046] Inhibitor: 2-phenyl-3-butyn-2-ol;

[0047] Tent fabric base material;

[0048] (2) Preparation of mosquito repellent substances containing double bonds;

[0049] By weight, 15 parts of hydroxycitronellal and 5 parts of silane coupling agent were first added to a reaction bottle, and then acetic acid was added to adjust the pH value of the system to 4, and the mixture was reacted at 60° C. for 6 hours, and a mosquito repellent containing a double bond was obtained after post-treatment;

[0050] (3) Preparation of mosquito repellent modifiers containing silicon-hydrogen bonds;

[0051] 5 parts of hydrogen-containing silicone oil and 4 parts of mosquito repellent containing double bonds were added to a reaction kettle by weight, the molar ratio of -C=C- to -Si-H in the system was controlled to be 0.2:1, and after heating to 100°C, 2 parts of Karstedt catalyst were added under stirring, and the temperature was raised to 120°C and reacted for 3 hours to obtain a mosquito repellent modifier containing silicon-hydrogen bonds (structural formula: Figure 1 shown);

[0052] (4) preparing mosquito repellent and insect repellent coating finishing agent;

[0053] The mosquito repellent and insecticide coating finishing agent is composed of 1 part of a mosquito repellent modifier containing a silicon-hydrogen bond, 1 part of pyrethrin, 90 parts of double-terminal vinyl silicone oil, 3 parts of polyvinyl silicone oil, 10 parts of white carbon black, 1 part of a Karstedt catalyst and 0.1 part of an inhibitor, in parts by weight;

[0054] (5) Preparation of outdoor tent fabrics with mosquito and insect repellent functions;

[0055] After the mosquito and insect repellent coating finishing agent is evenly mixed, it is injection-coated on the surface of the tent fabric substrate, the coating thickness is controlled to be 0.8 mm, and the reaction is carried out at 90° C. for 8 minutes to obtain an outdoor tent fabric with mosquito and insect repellent functions.

[0056] The water contact angle of the outdoor tent fabric with mosquito and insect repellent function finally prepared is 120°, and the repellency rate is 99.8%; after washing 10 times, the repellency rate of the outdoor tent fabric with mosquito and insect repellent function is 95.5%.

[0057] Comparative Example 1

[0058] A method for preparing an outdoor tent fabric is basically the same as that of Example 1, except that in step (3), the molar ratio of -C=C- to -Si-H in the system is controlled to be 0.1:1.

[0059] The avoidance rate of the outdoor tent fabric finally produced is 92%; after washing 10 times, the avoidance rate of the outdoor tent fabric is 91.8%.

[0060] Compared with Example 1, Comparative Example 1 shows that the mosquito repellent and insecticide performance of the outdoor tent fabric and the stability of the mosquito repellent and insecticide performance are significantly reduced. This is because when the molar ratio of -C=C- to -Si-H is 0.1:1, the number of polar side chains is too small, which makes the volume expansion effect of the mosquito repellent modifier containing silicon-hydrogen bonds worse. Due to the poor volume expansion effect, it is difficult to achieve good compatibility between the components, which in turn affects the effective role of the mosquito repellent and insecticide substances in the coating, and ultimately leads to a significant decrease in the mosquito repellent and insecticide performance of the outdoor tent fabric and the stability of the mosquito repellent and insecticide performance.

[0061] Comparative Example 2

[0062] A method for preparing an outdoor tent fabric is basically the same as that of Example 1, except that in step (3), the molar ratio of -C=C- to -Si-H in the system is controlled to be 0.5:1.

[0063] After washing 10 times, the repellency rate of outdoor tent fabric is 90.9%.

[0064] Compared with Example 1, the stability of the mosquito repellent and insecticide performance of the outdoor tent fabric in Comparative Example 2 is significantly reduced. This is because when the molar ratio of -C=C- to -Si-H is 0.5:1, the number of remaining silicon-hydrogen bonds is too small, and the reaction sites participating in the later coating polymerization are also reduced, resulting in insufficient coating strength. After being affected by external factors such as water washing, the structural integrity of the coating is easily destroyed, which in turn affects the stable existence and effective function of the mosquito repellent and insecticide substances in the coating.

[0065] Example 2

[0066] A method for preparing an outdoor tent fabric with mosquito and insect repellent functions is basically the same as that in Example 1, except that in step (4), the mosquito and insect repellent coating finishing agent does not contain white carbon black.

[0067] The water contact angle of the outdoor tent fabric with mosquito and insect repellent function finally prepared is 118°, and the repellency rate is 99.8%; after washing 10 times, the repellency rate of the outdoor tent fabric with mosquito and insect repellent function is 95.8%.

[0068] Example 3

[0069] A method for preparing an outdoor tent fabric with mosquito and insect repellent functions, the specific steps are as follows:

[0070] (1) Preparation of raw materials;

[0071] Hydroxycitronellal;

[0072] Silane coupling agent: vinyl tris (2-methoxyethoxy) silane;

[0073] Acetic acid;

[0074] Hydrogen-containing silicone oil: The manufacturer is Shanghai Guiyou New Material Technology Co., Ltd., the hydrogen content is 1.2wt%, and the hydrogen atoms are located in the side chain;

[0075] Karstedt catalyst: The manufacturer is Shanghai Sibao High-tech Materials Co., Ltd., the brand is Pt-50S;

[0076] Pyrethrin: CAS number is 121-29-9;

[0077] Double-terminated vinyl silicone oil: The manufacturer is Shanghai Guiyou New Material Technology Co., Ltd., the vinyl content is 0.17wt%, and the structural formula is CH2=CH(CH3)2Si-O-[(CH3)2Si-O] 2000 Si(CH3)2CH=CH2;

[0078] Polyvinyl silicone oil: that is, vinyl silicone oil with double bonds in both the end group and the side chain. The manufacturer is Shanghai Guiyou New Material Technology Co., Ltd., and the vinyl content is 10wt%;

[0079] White carbon black: manufacturer is Evonik Industries, product number is R972;

[0080] Inhibitor: 2-phenyl-3-butyn-2-ol;

[0081] Tent fabric base material;

[0082] (2) Preparation of mosquito repellent substances containing double bonds;

[0083] By weight, 20 parts of hydroxycitronellal and 8 parts of silane coupling agent were first added to a reaction bottle, and then acetic acid was added to adjust the pH value of the system to 5, and the mixture was reacted at 70° C. for 7 hours, and then post-treated to obtain a mosquito repellent containing a double bond;

[0084] (3) Preparation of mosquito repellent modifiers containing silicon-hydrogen bonds;

[0085] 8 parts of hydrogen-containing silicone oil and 10 parts of mosquito repellent containing double bonds were added into a reaction kettle by weight, the molar ratio of -C=C- to -Si-H in the system was controlled to be 0.3:1, the temperature was raised to 100° C., 3 parts of Karstedt catalyst were added under stirring, the temperature was raised to 130° C. and the reaction was carried out for 4 hours to obtain a mosquito repellent modifier containing silicon-hydrogen bonds;

[0086] (4) preparing mosquito repellent and insect repellent coating finishing agent;

[0087] The mosquito repellent and insecticide coating finishing agent is composed of 2 parts of a mosquito repellent modifier containing a silicon-hydrogen bond, 2 parts of pyrethrin, 100 parts of double-terminal vinyl silicone oil, 5 parts of polyvinyl silicone oil, 30 parts of white carbon black, 1.5 parts of a Karstedt catalyst and 0.1 parts of an inhibitor, in parts by weight;

[0088] (5) Preparation of outdoor tent fabrics with mosquito and insect repellent functions;

[0089] After the mosquito and insect repellent coating finishing agent is evenly mixed, it is injected and coated on the surface of the tent fabric substrate, the coating thickness is controlled to be 1 mm, and the reaction is carried out at 95° C. for 9 minutes to obtain an outdoor tent fabric with mosquito and insect repellent functions.

[0090] The water contact angle of the outdoor tent fabric with mosquito repellent and insect removal function finally prepared is 130°, and the repellency rate is 99.9%; after being washed 10 times, the repellency rate of the outdoor tent fabric with mosquito repellent and insect removal function is 99.6%.

[0091] Example 4

[0092] A method for preparing an outdoor tent fabric with mosquito and insect repellent functions, the specific steps are as follows:

[0093] (1) Preparation of raw materials;

[0094] Hydroxycitronellal;

[0095] Silane coupling agent: γ-methacryloxypropyltrimethoxysilane;

[0096] Acetic acid;

[0097] Hydrogen-containing silicone oil: The manufacturer is Shanghai Guiyou New Material Technology Co., Ltd., the hydrogen content is 1.6wt%, and the hydrogen atoms are located in the side chain;

[0098] Karstedt catalyst: The manufacturer is Shanghai Sibao High-tech Materials Co., Ltd., the brand is Pt-50S;

[0099] Pyrethrin: CAS number is 121-29-9;

[0100] Double-terminated vinyl silicone oil: The manufacturer is Shanghai Guiyou New Material Technology Co., Ltd., the vinyl content is 0.43wt%, and the structural formula is CH2=CH(CH3)2Si-O-[(CH3)2Si-O] 200 Si(CH3)2CH=CH2;

[0101] Polyvinyl silicone oil: that is, vinyl silicone oil with double bonds in both the end group and the side chain. The manufacturer is Shanghai Guiyou New Materials Technology Co., Ltd., and the vinyl content is 12wt%;

[0102] White carbon black: manufacturer is Evonik Industries, product number is R972;

[0103] Inhibitor: 2-methyl-3-butyn-2-ol;

[0104] Tent fabric base material;

[0105] (2) Preparation of mosquito repellent substances containing double bonds;

[0106] By weight, 25 parts of hydroxycitronellal and 10 parts of silane coupling agent were first added to a reaction bottle, and then acetic acid was added to adjust the pH value of the system to 5, and the mixture was reacted at 70° C. for 8 hours, and then post-treated to obtain a mosquito repellent containing a double bond;

[0107] (3) Preparation of mosquito repellent modifiers containing silicon-hydrogen bonds;

[0108] 10 parts of hydrogen-containing silicone oil and 20 parts of mosquito repellent containing double bonds were added into a reaction kettle by weight, the molar ratio of -C=C- to -Si-H in the system was controlled to be 0.4:1, the temperature was raised to 100° C., 3 parts of Karstedt catalyst were added under stirring, the temperature was raised to 135° C. and the reaction was carried out for 5 hours to obtain a mosquito repellent modifier containing silicon-hydrogen bonds;

[0109] (4) preparing mosquito repellent and insect repellent coating finishing agent;

[0110] The mosquito repellent and insecticide coating finishing agent is composed of 2 parts of a mosquito repellent modifier containing a silicon-hydrogen bond, 2 parts of pyrethrin, 100 parts of double-terminal vinyl silicone oil, 5 parts of polyvinyl silicone oil, 40 parts of white carbon black, 2 parts of a Karstedt catalyst and 0.2 parts of an inhibitor, in parts by weight;

[0111] (5) Preparation of outdoor tent fabrics with mosquito and insect repellent functions;

[0112] After the mosquito and insect repellent coating finishing agent is evenly mixed, it is injection-coated on the surface of the tent fabric substrate, the coating thickness is controlled to be 1.2 mm, and the reaction is carried out at 100° C. for 10 minutes to obtain an outdoor tent fabric with mosquito and insect repellent functions.

[0113] The water contact angle of the outdoor tent fabric with mosquito repellent and insect removal function finally prepared is 125°, and the repellency rate is 99.9%; after being washed 10 times, the repellency rate of the outdoor tent fabric with mosquito repellent and insect removal function is 99.6%.

[0114] Example 5

[0115] A method for preparing an outdoor tent fabric with mosquito and insect repellent functions, the specific steps are as follows:

[0116] (1) Preparation of raw materials;

[0117] Hydroxycitronellal;

[0118] Silane coupling agent: vinyltrimethoxysilane;

[0119] Acetic acid;

[0120] Hydrogen-containing silicone oil: The manufacturer is Shanghai Guiyou New Material Technology Co., Ltd., the hydrogen content is 1wt%, and the hydrogen atoms are located in the side chain;

[0121] Karstedt catalyst: The manufacturer is Shanghai Sibao High-tech Materials Co., Ltd., the brand is Pt-50S;

[0122] Pyrethrin: CAS number is 121-29-9;

[0123] Double-terminated vinyl silicone oil: The manufacturer is Shanghai Guiyou New Material Technology Co., Ltd., the vinyl content is 0.12wt%, and the structural formula is CH2=CH(CH3)2Si-O-[(CH3)2Si-O] 2500 Si(CH3)2CH=CH2;

[0124] Polyvinyl silicone oil: that is, vinyl silicone oil with double bonds in both the end group and the side chain. The manufacturer is Shanghai Guiyou New Materials Technology Co., Ltd., and the vinyl content is 9wt%;

[0125] White carbon black: manufacturer is Evonik Industries, product number is R972;

[0126] Inhibitor: 2-methyl-3-butyn-2-ol;

[0127] Tent fabric base material;

[0128] (2) Preparation of mosquito repellent substances containing double bonds;

[0129] By weight, 18 parts of hydroxycitronellal and 6 parts of silane coupling agent were first added to a reaction bottle, and then acetic acid was added to adjust the pH value of the system to 4, and the mixture was reacted at 60° C. for 6 hours, and a mosquito repellent containing a double bond was obtained after post-treatment;

[0130] (3) Preparation of mosquito repellent modifiers containing silicon-hydrogen bonds;

[0131] 6 parts of hydrogen-containing silicone oil and 6 parts of mosquito repellent containing double bonds were added into a reaction kettle by weight, the molar ratio of -C=C- to -Si-H in the system was controlled to be 0.2:1, the temperature was raised to 100° C., 2 parts of Karstedt catalyst were added under stirring, the temperature was raised to 125° C. and the reaction was carried out for 3 hours to obtain a mosquito repellent modifier containing silicon-hydrogen bonds;

[0132] (4) preparing mosquito repellent and insect repellent coating finishing agent;

[0133] The mosquito repellent and insecticide coating finishing agent is composed of 1 part of a mosquito repellent modifier containing a silicon-hydrogen bond, 1 part of pyrethrin, 90 parts of double-terminal vinyl silicone oil, 4 parts of polyvinyl silicone oil, 40 parts of white carbon black, 1 part of a Karstedt catalyst and 0.1 part of an inhibitor, in parts by weight;

[0134] (5) Preparation of outdoor tent fabrics with mosquito and insect repellent functions;

[0135] After the mosquito and insect repellent coating finishing agent is evenly mixed, it is injection-coated on the surface of the tent fabric substrate, the coating thickness is controlled to be 0.8 mm, and the reaction is carried out at 90° C. for 8 minutes to obtain an outdoor tent fabric with mosquito and insect repellent functions.

[0136] The water contact angle of the outdoor tent fabric with mosquito repellent and insect removal function finally prepared is 128°, and the repellency rate is 99.8%; after washing 10 times, the repellency rate of the outdoor tent fabric with mosquito repellent and insect removal function is 99.7%.

[0137] Example 6

[0138] A method for preparing an outdoor tent fabric with mosquito and insect repellent functions, the specific steps are as follows:

[0139] (1) Preparation of raw materials;

[0140] Hydroxycitronellal;

[0141] Silane coupling agent: γ-methacryloxypropyltrimethoxysilane;

[0142] Acetic acid;

[0143] Hydrogen-containing silicone oil: The manufacturer is Shanghai Guiyou New Material Technology Co., Ltd., the hydrogen content is 1.4wt%, and the hydrogen atoms are located in the side chain;

[0144] Karstedt catalyst: The manufacturer is Shanghai Sibao High-tech Materials Co., Ltd., the brand is Pt-50S;

[0145] Pyrethrin: CAS number is 121-29-9;

[0146] Double-terminated vinyl silicone oil: The manufacturer is Shanghai Guiyou New Material Technology Co., Ltd., the vinyl content is 0.34wt%, and the structural formula is CH2=CH(CH3)2Si-O-[(CH3)2Si-O] 500 Si(CH3)2CH=CH2;

[0147] Polyvinyl silicone oil: that is, vinyl silicone oil with double bonds in both the end group and the side chain. The manufacturer is Shanghai Guiyou New Material Technology Co., Ltd., and the vinyl content is 11wt%;

[0148] White carbon black: manufacturer is Evonik Industries, product number is R972;

[0149] Inhibitor: 2-phenyl-3-butyn-2-ol;

[0150] Tent fabric base material;

[0151] (2) Preparation of mosquito repellent substances containing double bonds;

[0152] By weight, 22 parts of hydroxycitronellal and 9 parts of silane coupling agent were first added to a reaction bottle, and then acetic acid was added to adjust the pH value of the system to 5, and the mixture was reacted at 70° C. for 7 hours, and then post-treated to obtain a mosquito repellent containing a double bond;

[0153] (3) Preparation of mosquito repellent modifiers containing silicon-hydrogen bonds;

[0154] 9 parts of hydrogen-containing silicone oil and 15 parts of mosquito repellent containing double bonds were added into a reaction kettle by weight, the molar ratio of -C=C- to -Si-H in the system was controlled to be 0.3:1, the temperature was raised to 110° C., 3 parts of Karstedt catalyst were added under stirring, the temperature was raised to 130° C. and the reaction was carried out for 5 hours to obtain a mosquito repellent modifier containing silicon-hydrogen bonds;

[0155] (4) preparing mosquito repellent and insect repellent coating finishing agent;

[0156] The mosquito repellent and insecticide coating finishing agent is composed of 2 parts of a mosquito repellent modifier containing a silicon-hydrogen bond, 2 parts of pyrethrin, 100 parts of double-terminal vinyl silicone oil, 5 parts of polyvinyl silicone oil, 40 parts of white carbon black, 2 parts of a Karstedt catalyst and 0.2 parts of an inhibitor, in parts by weight;

[0157] (5) Preparation of outdoor tent fabrics with mosquito and insect repellent functions;

[0158] After the mosquito and insect repellent coating finishing agent is evenly mixed, it is injection-coated on the surface of the tent fabric substrate, the coating thickness is controlled to be 1.2 mm, and the reaction is carried out at 100° C. for 10 minutes to obtain an outdoor tent fabric with mosquito and insect repellent functions.

[0159] The water contact angle of the outdoor tent fabric with mosquito repellent and insect removal function finally prepared is 130°, and the repellency rate is 99.9%; after being washed 10 times, the repellency rate of the outdoor tent fabric with mosquito repellent and insect removal function is 99.6%.

Claims

1. A mosquito repellent and insecticide coating finishing agent, characterized in that: The invention comprises, by weight, 1-2 parts of a mosquito repellent modifier containing a silicon-hydrogen bond, 1-2 parts of pyrethrin, 90-100 parts of a double-terminal vinyl silicone oil, 3-5 parts of a polyvinyl silicone oil, 1.0-2.0 parts of a Karstedt catalyst, and 0.1-0.2 parts of an inhibitor; The mosquito repellent modifier containing silicon-hydrogen bonds is obtained by reacting hydrogen-containing silicone oil with a mosquito repellent substance containing double bonds. During the reaction, the molar ratio of -C=C- to -Si-H is 0.2-0.4:1, and the hydrogen atoms of the hydrogen-containing silicone oil are located in the side chain.

2. The mosquito repellent and insecticide coating finishing agent according to claim 1, characterized in that: The preparation process of the mosquito repellent modifier containing silicon-hydrogen bonds is as follows: by weight, 5-10 parts of hydrogen-containing silicone oil and 4-20 parts of mosquito repellent substances containing double bonds are added into a reaction kettle, the temperature is raised to 100-110° C., 2-3 parts of Karstedt catalyst are added under stirring conditions, the temperature is raised to 120-135° C., and the reaction is carried out for 3-5 hours to obtain the mosquito repellent modifier containing silicon-hydrogen bonds.

3. The mosquito repellent and insecticide coating finishing agent according to claim 2, characterized in that: The hydrogen content of hydrogen-containing silicone oil is 0.8-1.6wt%.

4. The mosquito repellent and insecticide coating finishing agent according to claim 2, characterized in that: The preparation process of the mosquito repellent containing double bonds is as follows: by weight, 15-25 parts of hydroxycitronellal and 5-10 parts of silane coupling agent are first added into a reaction bottle, acetic acid is then added to adjust the pH value of the system to 4-5, the reaction is carried out at 60-70° C. for 6-8 hours, and after post-treatment, the mosquito repellent containing double bonds is obtained.

5. The mosquito repellent and insecticide coating finishing agent according to claim 4, characterized in that: The silane coupling agent is vinyl trimethoxy silane, vinyl tri (2-methoxyethoxy) silane or γ-methacryloxypropyl trimethoxy silane.

6. The mosquito repellent and insecticide coating finishing agent according to claim 1, characterized in that: The vinyl content of double-terminated vinyl silicone oil is 0.05-0.43wt%, and the general structural formula is: CH2=CH(CH3)2Si-O-[(CH3)2Si-O] n Si(CH3)2CH=CH2, where n=200-3000.

7. The mosquito repellent and insecticide coating finishing agent according to claim 1, characterized in that: Polyvinyl silicone oil is a vinyl silicone oil containing double bonds in both the terminal group and the side chain, and the vinyl content is 8-12wt%.

8. The mosquito-repellent and insect-removing coating finishing agent according to claim 1, characterized in that: By weight, 10-40 parts of white carbon black are also included.

9. The mosquito repellent and insecticide coating finishing agent according to claim 1, characterized in that: The inhibitor is 2-phenyl-3-butyn-2-ol or 2-methyl-3-butyn-2-ol.

10. The use of a mosquito-repellent and insect-removing coating finishing agent according to any one of claims 1 to 9, characterized in that: After the mosquito repellent and insecticide coating finishing agent is evenly mixed, it is injected and coated on the surface of the tent fabric substrate, the coating thickness is controlled to be 0.8-1.2mm, and the reaction is carried out at 90-100°C for 8-10min to obtain an outdoor tent fabric with mosquito repellent and insecticide function; the outdoor tent fabric with mosquito repellent and insecticide function has a water contact angle of 118-130°, a repellency rate of more than 99.8%, and a repellency rate of more than 95.5% after washing 10 times.

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