Outdoor anti-aging waterproof insulating adhesive tape

Abstract

The invention relates to the technical field of daily necessities, in particular to an outdoor anti-aging waterproof insulating adhesive tape. The outdoor anti-aging waterproof insulating adhesive tape comprises a release film layer and an anti-aging waterproof layer, the aging-resistant waterproof layer is prepared from the following raw materials in parts by weight: 20 to 50 parts of 3, 5-di-tert-butyl-4-hydroxyphenylpropionic acid isooctyl ester, 30 to 50 parts of epoxy resin, 15 to 30 parts of polysebacic anhydride, 5 to 12 parts of adhesive, 1 to 4 parts of antioxidant and 10 to 20 parts of aging-resistant filler. According to the invention, the specific anti-aging filler is prepared in the raw materials, so that the adhesive tape has good anti-aging and waterproof performance and also has good viscosity and peel strength, the comprehensive performance of the outdoor anti-aging and waterproof insulating adhesive tape can be remarkably improved, and strict requirements of outdoor application are met.

Description

Technical Field

[0001] The invention relates to the technical field of daily necessities, and in particular to an aging-resistant and waterproof insulating tape used outdoors. Background Art

[0002] In the electrical engineering and construction industries, waterproof insulation tapes are essential for their use in waterproofing and insulating cable joints, pipes, and other electrical components. With the development of technology and the diversification of application environments, the performance requirements for waterproof insulation tapes are becoming increasingly higher, especially in terms of aging resistance. Aging-resistant waterproof insulation tapes can effectively resist material degradation caused by environmental factors such as ultraviolet rays, temperature changes, humidity, and chemical corrosion, and maintain their waterproof and insulating properties.

[0003] During long-term use, the performance of traditional waterproof insulating tapes often deteriorates due to environmental factors. Photo-oxidation caused by ultraviolet radiation, material hardening or softening caused by temperature changes, and material degradation accelerated by humidity and chemical corrosion are all key factors affecting the aging resistance of the tape. Therefore, the development of waterproof insulating tapes with excellent aging resistance is of great significance for improving the reliability of electrical systems and extending their service life. This requires that the tape material not only has good initial performance, but also maintains these properties during long-term use.

[0004] In order to improve the aging resistance of waterproof insulating tape, researchers have made innovations in material selection and formula design. The aging resistance of the tape can be effectively improved by introducing anti-aging agents containing double bonds, using hindered amine light stabilizers, adding antioxidants and metal organic compounds. These anti-aging agents can capture free radicals, absorb ultraviolet rays, and prevent photo-oxidation and thermal oxidation of materials, thereby extending the service life of the tape. In addition, by improving the production process, such as controlling the cross-linking density and optimizing the microstructure of the material, the aging resistance of the tape can also be further improved.

[0005] Chinese invention patent CN115505343A discloses an anti-aging sealing tape for doors and windows and a preparation method thereof, comprising a release film layer, an adhesive layer and an elastic anti-aging layer arranged in sequence from the outside to the inside; the adhesive layer is prepared from the following raw materials in parts by weight: 40-55 parts of phenolic epoxy resin, 12-25 parts of anti-aging adhesion promoter, 10-20 parts of ethylene-1-octene copolymer, 1-3 parts of antioxidant and 0.5-2 parts of ultraviolet absorber; the elastic anti-aging layer is prepared from the following raw materials in parts by weight: 35-56 parts of butyl rubber, 10-22 parts of elastic anti-aging filler, 8-15 parts of polyisobutylene, 6-13 parts of tackifying resin, 3-8 parts of nano calcium carbonate and 0.8-1.5 parts of antioxidant. Although the invention prepares a tape with good corrosion resistance and sealing performance, in order to adapt to a wider range of outdoor application scenarios, the anti-aging and waterproof performance needs to be further improved. Summary of the invention

[0006] In view of the above-mentioned deficiencies in the prior art, the present invention provides an aging-resistant and waterproof insulating tape for outdoor use.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: An aging-resistant waterproof insulating tape for outdoor use comprises a release film layer and an aging-resistant waterproof layer; the aging-resistant waterproof layer is prepared from the following raw materials in parts by weight: 20-50 parts by weight of 3,5-di-tert-butyl-4-hydroxyphenylpropionate, 30-50 parts by weight of epoxy resin, 15-30 parts by weight of polysebacic anhydride, 5-12 parts by weight of adhesive, 1-4 parts by weight of antioxidant, and 10-20 parts by weight of aging-resistant filler.

[0008] The release film layer is obtained by attaching an organic silicon release agent to a PET film.

[0009] The adhesive includes at least one of a polypropylene resin adhesive and a polyurethane adhesive.

[0010] The antioxidant is any one of antioxidant 1010 and antioxidant 264.

[0011] Titanium dioxide has good ultraviolet absorption performance and strong photocatalytic performance, but it will cause damage to the materials in contact with it. This is because after absorbing ultraviolet rays, holes and electron pairs will be generated on the surface of nano titanium dioxide. These holes and electron pairs have extremely strong oxidizing and reducing properties, which will have a great impact on the service life of the material. Talc is an excellent electrical insulating material that can improve the electrical insulation performance of the tape and reduce the risk of current leakage. It can be widely used in insulating materials. The flaky structure of talcum powder forms a layered arrangement in the tape, which can improve the puncture resistance and wear resistance of the tape, while reducing the shrinkage rate of the tape. It has a good protection against ultraviolet rays and can reduce the damage of ultraviolet rays to the organic components in the tape, thereby improving the aging resistance of the tape. Therefore, the present application mixes titanium dioxide and talcum powder and coats the surface with nano-silicon dioxide to make a composite filler. Such a composite filler has ultraviolet absorption properties while its photocatalytic properties are suppressed. It can give full play to its excellent ultraviolet absorption properties and reduce the photocatalytic properties of nano-titanium dioxide. The prepared composite filler can also improve the hydrophobicity of the material through modification, thereby improving the waterproof performance of the tape.

[0012] The preparation method of the aging-resistant filler comprises the following steps: S1. Mix titanium dioxide, talc and water, add tetraethyl orthosilicate, triethanolamine and isopropanol, heat and stir to obtain a composite filler; S2, mixing the composite filler and ethanol aqueous solution, ultrasonically dispersing them, adding a silane coupling agent, and heating for reaction to obtain a modified composite filler; S3, mixing the modified composite filler and N,N-dimethylaminoethyl amide and stirring evenly, adding an antioxidant and azobisisobutyronitrile, heating and polymerizing, and obtaining the anti-aging filler.

[0013] The specific reaction mechanism is as follows: S1. Mix titanium dioxide, talc and water, adjust the pH, which is helpful to increase the hydrolysis rate of tetraethyl orthosilicate and the surface activity of talc. Add tetraethyl orthosilicate, triethanolamine as an alkaline catalyst, and isopropanol as a co-solvent. Hydrolyze under heating conditions to form silicates. These silicates can react with the surface of talc and titanium dioxide to form a stable silicate layer to obtain a composite filler, which enhances the weather resistance and chemical resistance of the filler; S2. Mix the composite filler with an ethanol aqueous solution and ultrasonically disperse it to improve the dispersion and uniformity of the filler. Silane coupling agents are added. By heating, these coupling agents can react with the hydroxyl groups on the surface of the filler to form stable silicon-oxygen bonds to obtain modified composite fillers, which further improve the chemical resistance and weather resistance of the filler; S3 mixes the modified composite filler with the solvent N,N-dimethylformamide and adds antioxidants to capture free radicals to prevent oxidation and light aging of the material. In the presence of initiator azobisisobutyronitrile, heating promotes the uniform distribution and fixation of the antioxidant on the surface of the filler, and reacts under heating and stirring to ensure that the antioxidant fully reacts with the filler surface to obtain an aging-resistant filler.

[0014] The above-mentioned whole reaction mechanism involves the surface modification of filler, the grafting reaction of coupling agent and the immobilization of antioxidant, and these steps work together to improve the aging resistance of filler, making it suitable for high-performance aging-resistant waterproof insulating tape.

[0015] The anti-aging filler prepared by the present invention is applied to the outdoor anti-aging waterproof insulating tape and has the following technical effects: since the anti-aging filler contains titanium dioxide, the anti-aging agent is 2-(4,6-diamino-1,3,5-triazine-2-yl)ethyl-2-methyl-2-acrylate and 1-(formylaminomethyl)-1H-benzotriazole and other components that absorb ultraviolet rays, the damage of ultraviolet rays to the tape can be reduced, and the anti-aging component can capture free radicals to prevent oxidation and light aging, thereby improving the overall aging resistance of the tape and extending its service life in the outdoor environment; the anti-aging filler contains the anti-aging components of triazine acrylate and silane coupling agent, which can improve the adhesive tape. The weather resistance of the tape can be improved, so that it can maintain stable performance under extreme weather conditions; the addition of silane coupling agent can improve the bonding strength between the tape and the substrate, ensuring the long-lasting bonding strength of the tape when used outdoors, and at the same time, the hydrophobicity after modification is increased, which can reduce the water absorption rate of the tape, reduce the influence of moisture on the performance of the tape, and improve its reliability in humid environments; the aging-resistant filler contains talcum powder and silica, which can improve the mechanical strength of the tape, including tensile strength, tear strength and abrasion resistance, which is particularly important for outdoor applications. Therefore, the aging-resistant filler prepared by the above method can significantly improve the comprehensive performance of the outdoor aging-resistant waterproof insulating tape and meet the strict requirements of outdoor applications.

[0016] Preferably, the method for preparing the aging-resistant filler comprises the following steps: S1, 16-28 parts by weight of titanium dioxide, 20-40 parts by weight of talc and 240-500 parts by weight of water are mixed, the pH is adjusted to 9.5-10.5, 8-14 parts by weight of ethyl orthosilicate, 2-5 parts by weight of triethanolamine and 1-3 parts by weight of isopropanol are added, and the mixture is stirred at 60-80° C. and 300-500 rpm for 1-4 h, centrifuged, washed and dried to obtain a composite filler; S2, 20-40 parts by weight of the above composite filler and 240-480 parts by weight of 50-70wt% ethanol aqueous solution are mixed, dispersed at an ultrasonic power of 100-300W and an ultrasonic frequency of 40-70KHz for 0.5-2h, 3-6 parts by weight of a silane coupling agent are added, reacted at 60-80°C and 300-600rpm for 1-4h, filtered, washed and dried to obtain a modified composite filler; S3. Mix 16-30 parts by weight of the modified composite filler and 200-500 parts by weight of N,N-dimethylaminoethyl amide and stir evenly, add 3-6 parts by weight of antioxidant and 0.1-0.8 parts by weight of azobisisobutyronitrile, react at 80-110° C. and 200-400 rpm for 1-4 hours, centrifuge, wash and dry to obtain the anti-aging filler.

[0017] Due to the inorganic nature of the filler, the dispersibility and compatibility in organic materials are poor. The present invention uses two silane coupling agents to improve the dispersibility of the composite filler in the polymer matrix, thereby improving the mechanical stability of the material. Tetraethoxy divinyl disiloxane can react with the hydroxyl group on the surface of the filler to form a stable silicon oxygen bond, thereby improving the adhesion between the filler and the polymer matrix; N-(3-acryloxy-2-hydroxypropyl)-3-aminopropyl triethoxysilane contains an acryloxy group, which can participate in a free radical polymerization reaction, further enhancing the adhesion between the filler and the matrix. Therefore, the mixture of silane coupling agents forms a protective film on the surface of the filler, which can serve as a physical barrier to prevent the penetration of moisture and chemicals and improve the waterproof performance of the tape.

[0018] The silane coupling agent is at least one of tetraethoxydivinyldisiloxane and N-(3-acryloxy-2-hydroxypropyl)-3-aminopropyltriethoxysilane.

[0019] Preferably, the silane coupling agent is a mixture of tetraethoxydivinyldisiloxane and N-(3-acryloxy-2-hydroxypropyl)-3-aminopropyltriethoxysilane; further, the silane coupling agent is a mixture of tetraethoxydivinyldisiloxane and N-(3-acryloxy-2-hydroxypropyl)-3-aminopropyltriethoxysilane in a mass ratio of 1:(1.5-2.5).

[0020] The invention adopts an antioxidant which is a compound of 2-(4,6-diamino-1,3,5-triazine-2-yl)ethyl-2-methyl-2-acrylate and 1-(formylaminomethyl)-1H-benzotriazole. The reason is that triazine acrylate and benzotriazole have different anti-aging mechanisms. Triazine acrylate participates in cross-linking reaction through its active double bonds to form a stable chemical structure, thereby improving the heat resistance and light resistance of the material. Benzotriazole is a highly efficient ultraviolet absorber, which can absorb and disperse ultraviolet rays. The addition of benzotriazole significantly improves the protective ability of the adhesive tape against ultraviolet rays, reduces the photooxidation reaction caused by ultraviolet rays, and reduces the damage to the material, thereby extending the service life of the adhesive tape. Both triazine acrylate and benzotriazole have the ability to capture free radicals, and their synergistic effect can more effectively prevent the oxidation chain reaction caused by free radicals. Therefore, the two improve the aging resistance of the adhesive tape on different anti-aging mechanisms, thereby playing a synergistic role.

[0021] The antioxidant is at least one of 2-(4,6-diamino-1,3,5-triazine-2-yl)ethyl-2-methyl-2-acrylate and 1-(formylaminomethyl)-1H-benzotriazole.

[0022] Preferably, the antioxidant is a mixture of 2-(4,6-diamino-1,3,5-triazine-2-yl)ethyl-2-methyl-2-acrylate and 1-(formylaminomethyl)-1H-benzotriazole; further, the antioxidant is a mixture of 2-(4,6-diamino-1,3,5-triazine-2-yl)ethyl-2-methyl-2-acrylate and 1-(formylaminomethyl)-1H-benzotriazole in a mass ratio of (2-4):1.

[0023] The preparation method of the outdoor aging-resistant waterproof insulating tape comprises the following steps: coating a layer of release agent on one side of a PET film, drying, and obtaining a base layer; then directly coating the aging-resistant waterproof layer on the other surface of the base material, drying, cutting, and rolling, and obtaining the outdoor aging-resistant waterproof insulating tape.

[0024] Beneficial effects of the present invention: The present invention provides an aging-resistant and waterproof insulating tape for outdoor use. The preparation process of the present invention is simple and the raw materials are environmentally friendly. The present invention adds aging-resistant fillers to the raw materials of the aging-resistant and waterproof layer of the aging-resistant and waterproof insulating tape for outdoor use, so that the tape has excellent aging resistance and waterproof properties. The added antioxidant can absorb ultraviolet components, which can reduce the damage of ultraviolet rays to the tape. The anti-aging ingredients can capture free radicals, prevent oxidation and photoaging, thereby improving the overall aging resistance of the tape and extending its service life in outdoor environments; at the same time, the aging-resistant fillers contain talcum powder and silica, which can improve the tear resistance of the tape. The method prepares aging-resistant fillers with specific properties, which can significantly improve the comprehensive performance of outdoor aging-resistant and waterproof insulating tapes and meet the strict requirements of outdoor applications. DETAILED DESCRIPTION

[0025] The above content of the present invention is further described in detail below in conjunction with specific implementation modes, but this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments.

[0026] Introduction of some raw materials in this application: Epoxy resin, model DER6510HT, purchased from Jinan Huijinchuan Trading Co., Ltd. Polysebacic anhydride, product number xyh001, was purchased from Hubei Xinyuhong Biopharmaceutical Technology Co., Ltd.

[0027] Polypropylene resin adhesive, model PH-8800, was purchased from Dongguan Pinheng Adhesive Co., Ltd.

[0028] Example 1 A waterproof and aging-resistant insulating tape for outdoor use comprises a release film layer and an aging-resistant waterproof layer; the aging-resistant waterproof layer is prepared from the following raw materials in parts by weight: 30 parts by weight of 3,5-di-tert-butyl-4-hydroxyphenylpropionate, 40 parts by weight of epoxy resin, 20 parts by weight of polysebacic anhydride, 8 parts by weight of adhesive, 2 parts by weight of antioxidant, and 15 parts by weight of aging-resistant filler.

[0029] The release film layer is obtained by attaching an organic silicon release agent to a PET film.

[0030] The adhesive is a polypropylene resin adhesive.

[0031] The antioxidant is antioxidant 1010.

[0032] The preparation method of the aging-resistant filler comprises the following steps: mixing 20 parts by weight of titanium dioxide, 30 parts by weight of talc and 300 parts by weight of water, adjusting the pH value to 10, adding 10 parts by weight of ethyl orthosilicate, 3.5 parts by weight of triethanolamine and 2 parts by weight of isopropanol, stirring at 70° C. and 400 rpm for 2 hours, centrifuging, washing and drying to obtain the aging-resistant filler.

[0033] The preparation method of the outdoor aging-resistant waterproof insulating tape comprises the following steps: coating a layer of release agent on one side of a PET film, drying to obtain a base layer; then directly coating the aging-resistant waterproof layer on the other surface of the base material, drying, cutting and rolling to obtain the outdoor aging-resistant waterproof insulating tape.

[0034] Example 2 A waterproof and aging-resistant insulating tape for outdoor use comprises a release film layer and an aging-resistant waterproof layer; the aging-resistant waterproof layer is prepared from the following raw materials in parts by weight: 30 parts by weight of 3,5-di-tert-butyl-4-hydroxyphenylpropionate, 40 parts by weight of epoxy resin, 20 parts by weight of polysebacic anhydride, 8 parts by weight of adhesive, 2 parts by weight of antioxidant, and 15 parts by weight of aging-resistant filler.

[0035] The release film layer is obtained by attaching an organic silicon release agent to a PET film.

[0036] The adhesive is a polypropylene resin adhesive.

[0037] The antioxidant is antioxidant 1010.

[0038] The preparation method of the aging-resistant filler comprises the following steps: S1, 20 parts by weight of titanium dioxide, 30 parts by weight of talc and 300 parts by weight of water were mixed, the pH was adjusted to 10, 10 parts by weight of ethyl orthosilicate, 3.5 parts by weight of triethanolamine and 2 parts by weight of isopropanol were added, the mixture was stirred at 70° C. and 400 rpm for 2 h, centrifuged, washed and dried to obtain a composite filler; S2. Mix 30 parts by weight of the above-mentioned composite filler and 300 parts by weight of a 60wt% ethanol aqueous solution, disperse for 1 hour at an ultrasonic power of 200W and an ultrasonic frequency of 60KHz, add 5 parts by weight of a silane coupling agent, react at 70°C and 400rpm for 2 hours, filter, wash, and dry to obtain an aging-resistant filler; the silane coupling agent is tetraethoxydivinyldisiloxane.

[0039] The preparation method of the outdoor aging-resistant waterproof insulating tape comprises the following steps: coating a layer of release agent on one side of a PET film, drying to obtain a base layer; then directly coating the aging-resistant waterproof layer on the other surface of the base material, drying, cutting and rolling to obtain the outdoor aging-resistant waterproof insulating tape.

[0040] Example 3 A waterproof and aging-resistant insulating tape for outdoor use comprises a release film layer and an aging-resistant waterproof layer; the aging-resistant waterproof layer is prepared from the following raw materials in parts by weight: 30 parts by weight of 3,5-di-tert-butyl-4-hydroxyphenylpropionate, 40 parts by weight of epoxy resin, 20 parts by weight of polysebacic anhydride, 8 parts by weight of adhesive, 2 parts by weight of antioxidant, and 15 parts by weight of aging-resistant filler.

[0041] The release film layer is obtained by attaching an organic silicon release agent to a PET film.

[0042] The adhesive is a polypropylene resin adhesive.

[0043] The antioxidant is antioxidant 1010.

[0044] The preparation method of the aging-resistant filler comprises the following steps: S1, 20 parts by weight of titanium dioxide, 30 parts by weight of talc and 300 parts by weight of water were mixed, the pH was adjusted to 10, 10 parts by weight of ethyl orthosilicate, 3.5 parts by weight of triethanolamine and 2 parts by weight of isopropanol were added, the mixture was stirred at 70° C. and 400 rpm for 2 h, centrifuged, washed and dried to obtain a composite filler; S2. Mix 30 parts by weight of the above-mentioned composite filler and 300 parts by weight of a 60wt% ethanol aqueous solution, disperse for 1 hour at an ultrasonic power of 200W and an ultrasonic frequency of 60KHz, add 5 parts by weight of a silane coupling agent, react at 70°C and 400rpm for 2 hours, filter, wash, and dry to obtain the aging-resistant filler; the silane coupling agent is a mixture of tetraethoxydivinyldisiloxane and N-(3-acryloxy-2-hydroxypropyl)-3-aminopropyltriethoxysilane in a mass ratio of 1:2.

[0045] The preparation method of the outdoor aging-resistant waterproof insulating tape comprises the following steps: coating a layer of release agent on one side of a PET film, drying to obtain a base layer; then directly coating the aging-resistant waterproof layer on the other surface of the base material, drying, cutting and rolling to obtain the outdoor aging-resistant waterproof insulating tape.

[0046] Example 4 A waterproof and aging-resistant insulating tape for outdoor use comprises a release film layer and an aging-resistant waterproof layer; the aging-resistant waterproof layer is prepared from the following raw materials in parts by weight: 30 parts by weight of 3,5-di-tert-butyl-4-hydroxyphenylpropionate, 40 parts by weight of epoxy resin, 20 parts by weight of polysebacic anhydride, 8 parts by weight of adhesive, 2 parts by weight of antioxidant, and 15 parts by weight of aging-resistant filler.

[0047] The release film layer is obtained by attaching an organic silicon release agent to a PET film.

[0048] The adhesive is a polypropylene resin adhesive.

[0049] The antioxidant is antioxidant 1010.

[0050] The preparation method of the aging-resistant filler comprises the following steps: S1, 20 parts by weight of titanium dioxide, 30 parts by weight of talc and 300 parts by weight of water were mixed, the pH was adjusted to 10, 10 parts by weight of ethyl orthosilicate, 3.5 parts by weight of triethanolamine and 2 parts by weight of isopropanol were added, the mixture was stirred at 70° C. and 400 rpm for 2 h, centrifuged, washed and dried to obtain a composite filler; S2, 30 parts by weight of the above composite filler and 300 parts by weight of a 60wt% ethanol aqueous solution were mixed, dispersed at an ultrasonic power of 200W and an ultrasonic frequency of 60KHz for 1h, 5 parts by weight of a silane coupling agent were added, reacted at 70°C and 400rpm for 2h, filtered, washed and dried to obtain a modified composite filler; the silane coupling agent was a mixture of tetraethoxydivinyldisiloxane and N-(3-acryloxy-2-hydroxypropyl)-3-aminopropyltriethoxysilane in a mass ratio of 1:2; S3. Mix 20 parts by weight of the modified composite filler and 300 parts by weight of N,N-dimethylaminoethyl amide and stir evenly, add 4 parts by weight of antioxidant and 0.4 parts by weight of azobisisobutyronitrile, react at 100° C. and 300 rpm for 2 hours, centrifuge, wash and dry to obtain the aging-resistant filler.

[0051] The antioxidant is 2-(4,6-diamino-1,3,5-triazine-2-yl)ethyl-2-methyl-2-acrylate.

[0052] The preparation method of the outdoor aging-resistant waterproof insulating tape comprises the following steps: coating a layer of release agent on one side of a PET film, drying to obtain a base layer; then directly coating the aging-resistant waterproof layer on the other surface of the base material, drying, cutting and rolling to obtain the outdoor aging-resistant waterproof insulating tape.

[0053] Example 5 A waterproof and aging-resistant insulating tape for outdoor use comprises a release film layer and an aging-resistant waterproof layer; the aging-resistant waterproof layer is prepared from the following raw materials in parts by weight: 30 parts by weight of 3,5-di-tert-butyl-4-hydroxyphenylpropionate, 40 parts by weight of epoxy resin, 20 parts by weight of polysebacic anhydride, 8 parts by weight of adhesive, 2 parts by weight of antioxidant, and 15 parts by weight of aging-resistant filler.

[0054] The release film layer is obtained by attaching an organic silicon release agent to a PET film.

[0055] The adhesive is a polypropylene resin adhesive.

[0056] The antioxidant is antioxidant 1010.

[0057] The preparation method of the aging-resistant filler comprises the following steps: S1, 20 parts by weight of titanium dioxide, 30 parts by weight of talc and 300 parts by weight of water were mixed, the pH was adjusted to 10, 10 parts by weight of ethyl orthosilicate, 3.5 parts by weight of triethanolamine and 2 parts by weight of isopropanol were added, the mixture was stirred at 70° C. and 400 rpm for 2 h, centrifuged, washed and dried to obtain a composite filler; S2, 30 parts by weight of the above composite filler and 300 parts by weight of a 60wt% ethanol aqueous solution were mixed, dispersed at an ultrasonic power of 200W and an ultrasonic frequency of 60KHz for 1h, 5 parts by weight of a silane coupling agent were added, reacted at 70°C and 400rpm for 2h, filtered, washed and dried to obtain a modified composite filler; the silane coupling agent was a mixture of tetraethoxydivinyldisiloxane and N-(3-acryloxy-2-hydroxypropyl)-3-aminopropyltriethoxysilane in a mass ratio of 1:2; S3. Mix 20 parts by weight of the modified composite filler and 300 parts by weight of N,N-dimethylaminoethyl amide and stir evenly, add 4 parts by weight of antioxidant and 0.4 parts by weight of azobisisobutyronitrile, react at 100° C. and 300 rpm for 2 hours, centrifuge, wash and dry to obtain the aging-resistant filler.

[0058] The antioxidant is 1-(formylaminomethyl)-1H-benzotriazole.

[0059] The preparation method of the outdoor aging-resistant waterproof insulating tape comprises the following steps: coating a layer of release agent on one side of a PET film, drying to obtain a base layer; then directly coating the aging-resistant waterproof layer on the other surface of the base material, drying, cutting and rolling to obtain the outdoor aging-resistant waterproof insulating tape.

[0060] Example 6 A waterproof and aging-resistant insulating tape for outdoor use comprises a release film layer and an aging-resistant waterproof layer; the aging-resistant waterproof layer is prepared from the following raw materials in parts by weight: 30 parts by weight of 3,5-di-tert-butyl-4-hydroxyphenylpropionate, 40 parts by weight of epoxy resin, 20 parts by weight of polysebacic anhydride, 8 parts by weight of adhesive, 2 parts by weight of antioxidant, and 15 parts by weight of aging-resistant filler.

[0061] The release film layer is obtained by attaching an organic silicon release agent to a PET film.

[0062] The adhesive is a polypropylene resin adhesive.

[0063] The antioxidant is antioxidant 1010.

[0064] The preparation method of the aging-resistant filler comprises the following steps: S1, 20 parts by weight of titanium dioxide, 30 parts by weight of talc and 300 parts by weight of water were mixed, the pH was adjusted to 10, 10 parts by weight of ethyl orthosilicate, 3.5 parts by weight of triethanolamine and 2 parts by weight of isopropanol were added, the mixture was stirred at 70° C. and 400 rpm for 2 h, centrifuged, washed and dried to obtain a composite filler; S2, 30 parts by weight of the above composite filler and 300 parts by weight of a 60wt% ethanol aqueous solution were mixed, dispersed at an ultrasonic power of 200W and an ultrasonic frequency of 60KHz for 1h, 5 parts by weight of a silane coupling agent were added, reacted at 70°C and 400rpm for 2h, filtered, washed and dried to obtain a modified composite filler; the silane coupling agent was a mixture of tetraethoxydivinyldisiloxane and N-(3-acryloxy-2-hydroxypropyl)-3-aminopropyltriethoxysilane in a mass ratio of 1:2; S3. Mix 20 parts by weight of the modified composite filler and 300 parts by weight of N,N-dimethylaminoethyl amide and stir evenly, add 4 parts by weight of antioxidant and 0.4 parts by weight of azobisisobutyronitrile, react at 100° C. and 300 rpm for 2 hours, centrifuge, wash and dry to obtain the aging-resistant filler.

[0065] The antioxidant is a mixture of 2-(4,6-diamino-1,3,5-triazine-2-yl)ethyl-2-methyl-2-acrylate and 1-(formylaminomethyl)-1H-benzotriazole in a mass ratio of 3:1.

[0066] The preparation method of the outdoor aging-resistant waterproof insulating tape comprises the following steps: coating a layer of release agent on one side of a PET film, drying to obtain a base layer; then directly coating the aging-resistant waterproof layer on the other surface of the base material, drying, cutting and rolling to obtain the outdoor aging-resistant waterproof insulating tape.

[0067] Test Example 1 Waterproof performance test: The outdoor aging-resistant waterproof insulating tape prepared in Examples 1-6 was cut into 2 cm × 2 cm small pieces, weighed and recorded as m0, and then the small pieces were placed in distilled water and soaked for 48 hours. After being taken out, the excess surface water was absorbed with filter paper and weighed and recorded as m1. The water absorption rate η of the film was calculated according to the following formula: η=[(m1-m0) / m0]×100% Wherein, η water absorption rate, %; m0-initial weight of the film, g; m1-weight of the film after water absorption. Each group was tested 4 times and the average value was taken. The test results are shown in Table 1; Aging resistance test: The outdoor aging-resistant waterproof insulating tapes prepared in Examples 1-6 were cut into samples of 2 cm × 2 cm × 0.2 cm, placed in a constant temperature and humidity chamber at 70°C and 75% relative humidity, and stored for 6 months. After 6 months, record whether the samples have yellowing, oxidation, cracking, blistering and damage. If so, they are recorded as unqualified, otherwise they are qualified. 50 samples were tested in each group and the number of qualified samples was recorded.

[0068] Table 1 Waterproof and aging resistance test results of outdoor aging-resistant waterproof insulation tape

[0069] Test Example 2 Adhesion and peel strength test of outdoor aging-resistant waterproof insulating tape: Adhesion was measured using method A in national standard GB / T4851-2014 "Test method for adhesiveness of adhesive tapes", and glass strength was measured using method 1 in national standard GB / T2792-2014 "Test method for peel strength of adhesive tapes". Five groups were tested in each group and the average value was taken. The test results are shown in Table 2.

[0070] Table 2 Adhesion and peel strength test results of outdoor aging-resistant waterproof insulation tape

[0071] From the above results, it can be seen that the outdoor aging-resistant waterproof insulating tape prepared by the present invention has good aging-resistant and waterproof effects, and also has excellent viscosity and peeling strength. From Examples 1-3, it can be seen that the present invention uses two silane coupling agents to improve the dispersibility of the composite filler in the polymer matrix, thereby improving the mechanical stability of the material. Tetraethoxydivinyldisiloxane can react with the hydroxyl group on the surface of the filler to form a stable silicon oxygen bond, thereby improving the adhesion between the filler and the polymer matrix; N-(3-acryloxy-2-hydroxypropyl)-3-aminopropyltriethoxysilane contains an acryloyloxy group, which can participate in free radical polymerization and further enhance the adhesion between the filler and the matrix. Therefore, the mixture of silane coupling agents forms a protective film on the surface of the filler, which can serve as a physical barrier to prevent the penetration of moisture and chemicals and improve the waterproof performance of the tape.

[0072] It can be seen from Examples 4-6 that the antioxidant used in the present invention is a compound of 2-(4,6-diamino-1,3,5-triazine-2-yl)ethyl-2-methyl-2-acrylate and 1-(formylaminomethyl)-1H-benzotriazole. The reason is that triazine acrylate and benzotriazole have different anti-aging mechanisms. Triazine acrylate participates in the cross-linking reaction through its active double bonds to form a stable chemical structure, thereby improving the heat resistance and light resistance of the material. Benzotriazole is a highly efficient ultraviolet absorber that can absorb and disperse ultraviolet rays. The addition of benzotriazole significantly improves the tape's ability to protect against ultraviolet rays, reduces the photooxidation reaction caused by ultraviolet rays, and reduces its damage to the material, thereby extending the service life of the tape. Both triazine acrylate and benzotriazole have the ability to capture free radicals, and their synergistic effect can more effectively prevent the oxidation chain reaction caused by free radicals. Therefore, the two improve the aging resistance of the tape on different anti-aging mechanisms, thereby playing a synergistic role.

[0073] The anti-aging filler prepared by the present invention contains titanium dioxide, an anti-aging agent such as 2-(4,6-diamino-1,3,5-triazine-2-yl)ethyl-2-methyl-2-acrylate and 1-(formylaminomethyl)-1H-benzotriazole and other components that absorb ultraviolet rays, which can reduce the damage of ultraviolet rays to the adhesive tape; the anti-aging component can capture free radicals, prevent oxidation and light aging, thereby improving the overall aging resistance of the adhesive tape and extending its service life in an outdoor environment; the anti-aging filler contains the anti-aging components of triazine acrylate and silane coupling agent, which can improve the weather resistance of the adhesive tape and make it durable under extreme weather conditions. Maintain stable performance; the addition of silane coupling agent can improve the bonding strength between the tape and the substrate, ensuring the long-lasting bonding strength of the tape when used outdoors, and at the same time, the hydrophobicity after modification is increased, which can reduce the water absorption rate of the tape, reduce the impact of moisture on the performance of the tape, and improve its reliability in a humid environment; the aging-resistant filler contains talcum powder and silica, which can improve the mechanical strength of the tape, including tensile strength, tear strength and wear resistance, which is particularly important for outdoor applications. Therefore, the aging-resistant filler prepared by the above method can significantly improve the comprehensive performance of the outdoor aging-resistant waterproof insulating tape and meet the strict requirements of outdoor applications.

Claims

1. An aging-resistant and waterproof insulating tape for outdoor use, characterized in that: It comprises a release film layer and an anti-aging waterproof layer; the anti-aging waterproof layer is prepared from the following raw materials in parts by weight: 20-50 parts by weight of 3,5-di-tert-butyl-4-hydroxyphenylpropionate, 30-50 parts by weight of epoxy resin, 15-30 parts by weight of polysebacic anhydride, 5-12 parts by weight of adhesive, 1-4 parts by weight of antioxidant, and 10-20 parts by weight of anti-aging filler.

2. The aging-resistant waterproof insulating tape for outdoor use according to claim 1, characterized in that: The release film layer is obtained by attaching an organic silicon release agent to a PET film.

3. The aging-resistant waterproof insulating tape for outdoor use according to claim 1, characterized in that: The adhesive includes at least one of a polypropylene resin adhesive and a polyurethane adhesive.

4. The aging-resistant and waterproof insulating tape for outdoor use according to claim 1, characterized in that: The antioxidant is any one of antioxidant 1010 and antioxidant 264.

5. The aging-resistant and waterproof insulating tape for outdoor use according to claim 1, characterized in that: The preparation method of the aging-resistant filler comprises the following steps: S1. Mix titanium dioxide, talc and water, add tetraethyl orthosilicate, triethanolamine and isopropanol, heat and stir to obtain a composite filler; S2, mixing the composite filler and ethanol aqueous solution, ultrasonically dispersing them, adding a silane coupling agent, and heating for reaction to obtain a modified composite filler; S3, mixing the modified composite filler and N,N-dimethylaminoethyl amide and stirring evenly, adding an antioxidant and azobisisobutyronitrile, heating and polymerizing, and obtaining the anti-aging filler.

6. The aging-resistant and waterproof insulating tape for outdoor use according to claim 5, characterized in that: The preparation method of the aging-resistant filler comprises the following steps: S1, 16-28 parts by weight of titanium dioxide, 20-40 parts by weight of talc and 240-500 parts by weight of water are mixed, the pH is adjusted to 9.5-10.5, 8-14 parts by weight of ethyl orthosilicate, 2-5 parts by weight of triethanolamine and 1-3 parts by weight of isopropanol are added, and the mixture is stirred at 60-80° C. and 300-500 rpm for 1-4 h, centrifuged, washed and dried to obtain a composite filler; S2, 20-40 parts by weight of the above composite filler and 240-480 parts by weight of 50-70wt% ethanol aqueous solution are mixed, dispersed at an ultrasonic power of 100-300W and an ultrasonic frequency of 40-70KHz for 0.5-2h, 3-6 parts by weight of a silane coupling agent are added, reacted at 60-80°C and 300-600rpm for 1-4h, filtered, washed and dried to obtain a modified composite filler; S3. Mix 16-30 parts by weight of the modified composite filler and 200-500 parts by weight of N,N-dimethylaminoethyl amide and stir evenly, add 3-6 parts by weight of antioxidant and 0.1-0.8 parts by weight of azobisisobutyronitrile, react at 80-110° C. and 200-400 rpm for 1-4 hours, centrifuge, wash and dry to obtain the anti-aging filler.

7. The aging-resistant waterproof insulating tape for outdoor use according to claim 5 or 6, characterized in that: The silane coupling agent is at least one of tetraethoxydivinyldisiloxane and N-(3-acryloxy-2-hydroxypropyl)-3-aminopropyltriethoxysilane.

8. The aging-resistant waterproof insulating tape for outdoor use according to claim 5 or 6, characterized in that: The antioxidant is at least one of 2-(4,6-diamino-1,3,5-triazine-2-yl)ethyl-2-methyl-2-acrylate and 1-(formylaminomethyl)-1H-benzotriazole.

9. The method for preparing the outdoor aging-resistant waterproof insulating tape according to any one of claims 1 to 8, characterized in that: The method comprises the following steps: coating a layer of release agent on one side of a PET film, drying to obtain a base layer; then directly coating an aging-resistant waterproof layer on the other surface of the base material, drying, cutting and rolling to obtain an outdoor aging-resistant waterproof insulating tape.

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