Ant-proof silica gel foam sealing material and preparation method thereof

Abstract

The application provides an anti-termite sealing material of silica gel foam and a preparation method thereof, and belongs to the technical field of polymer sealing materials. The raw material formula of the anti-termite sealing material of silica gel foam is as follows: vinyl silicone oil, reinforcing filler, flame-retardant filler, contact killing agent, bait agent, odor agent, structure control agent, inhibitor, platinum catalyst, foaming agent, hydroxyl silicone oil and hydrogen-containing silicone oil; wherein the contact killing agent is one or more of pyrethroid, neonicotinoid, phenylpyrazole, boric acid, glycine, erythritol and fipronil; the bait agent is one or more of diatomite, talcum powder, capsaicin, dihydrocapsaicin and denatonium benzoate; and the odor agent is one or more of camphor oil, peppermint oil, limonin, limonene, citral, decanal, octanal and nonanal. The anti-termite sealing material of silica gel foam has excellent flame-retardant performance, mechanical performance and anti-termite biting performance, and can well protect the integrity of the sealing material.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of high polymer sealing materials, and particularly relates to an ant-eating-resistant silica gel foam sealing material and a preparation method thereof. BACKGROUND

[0002] The silica gel foam sealing material is a porous structure material with an organic silicon base as a core, and is endowed with unique elasticity and buffering performance through a foaming process. The main chain thereof is composed of silicon-oxygen bonds, so that the material has good temperature resistance, chemical inertness and anti-aging characteristics, and is widely applied in the fields of sealing, shock absorption, heat insulation and the like. With the increasing demand for material lightness and safety in new energy vehicles, aerospace and electronic equipment, silica gel foam gradually becomes an important material for battery package packaging, precision instrument protection and building sealing. The advantage of the silica gel foam sealing material lies in low density, high resilience, small compression permanent deformation, and the ability to adapt to mechanical stress and thermal cycles in complex environments. However, the traditional silica gel foam still has limitations in terms of flame retardancy, buffer gradient control and biological anti-invasion, and it is difficult to fully meet the requirements of high safety and long service life of power batteries. Especially in the battery package of new energy vehicles, the material needs to consider lightness, thermal protection and biological erosion resistance at the same time, which puts higher requirements on the performance of silica gel foam.

[0003] At present, the preparation of silica gel foam mainly depends on two processes of physical foaming and chemical foaming. Physical foaming forms a bubble structure in silicone rubber by introducing inert gas or low-boiling liquid, and the advantage is that the bubble uniformity is good, but the process is complex and the cost is high; chemical foaming generates gas by decomposing a foaming agent (such as AC, OBSH), which is simple to operate, but can lead to uneven bubble distribution, limited foaming ratio, and stress concentration of the material at high temperature. In addition, in order to improve the flame retardant performance, the existing technology often adds inorganic flame retardants (such as aluminum hydroxide, magnesium hydroxide) or liquid flame retardants, but a high filler ratio can reduce the elasticity and buffering performance of the material, and even cause bubble collapse or mechanical strength reduction. At the same time, although the closed-cell structure of the traditional silica gel foam can isolate moisture, it cannot effectively deal with the biological invasion problem of ants and the like, and the surface hardness and chemical inertness may attract ants to eat. These problems limit the long-term reliability of silica gel foam in high safety requirement scenarios (such as power battery sealing), and improvement and upgrading are needed in the design and preparation process of the material.

[0004] To optimize the comprehensive performance of silica gel foam, some researchers have introduced ceramicization reactions to improve its high-temperature resistance and heat insulation capacity, or adjusted the foaming system to achieve the smoothing of stress-strain curves. For example, the use of open-cell structure design can enhance the cushioning performance, but open-cell materials can reduce mechanical strength due to the weakness of the cell wall; the addition of functional fillers (such as nano-silicon dioxide) can improve the mechanical properties, but at the expense of foaming uniformity. At the same time, these improvement schemes have not solved the core problem that the material is easily eroded by biology. In the actual application of new energy vehicle battery pack, insects such as ants may damage the air tightness of the battery shell by gnawing the sealing material, leading to electrolyte leakage or short circuit risk, and then causing thermal runaway. Although the existing silica gel foam has chemical inertness, its soft texture and pore structure still become a breakthrough for biological invasion. Therefore, it is urgent to develop a silica gel foam sealing material with flame retardation and ant-eating function, which can maintain the original performance advantages and achieve active defense against biological invasion, thereby comprehensively improving the safety and service life of new energy vehicle batteries. SUMMARY

[0005] The purpose of the present application is to provide an ant-eating silica gel foam sealing material and a preparation method thereof. By introducing a contact killing agent combined with a bait agent and an odor agent, a substance component with mouse, insect and ant aversion or toxicity is added to the sealing material, thereby achieving the effect of driving away mice, insects and ants and protecting the integrity of the sealing material.

[0006] To achieve the above-mentioned purpose, the present application can be realized by the following technical solutions:

[0007] The present application provides an ant-eating silica gel foam sealing material and a preparation method thereof. According to weight parts, the following raw materials are included:

[0008] Vinyl silicone oil 30-50 parts, reinforcing filler 10-30 parts, flame retardant filler 40-80 parts, contact killing agent 0.02-0.2 parts, bait agent 2-20 parts, odor agent 0.2-2 parts, structure control agent 2-8 parts, inhibitor 0.1-0.3 parts, platinum catalyst 0.3-0.7 parts, foaming agent 1-5 parts, hydroxyl silicone oil 2-6 parts, hydrogen-containing silicone oil 5-15 parts.

[0009] Preferably, an ant-eating silica gel foam sealing material includes the following raw materials according to weight parts:

[0010] Vinyl silicone oil 40-50 parts, reinforcing filler 19-30 parts, flame retardant filler 50-60 parts, contact killing agent 0.12-0.16 parts, bait agent 4-8 parts, odor agent 1-1.2 parts, structure control agent 2-8 parts, inhibitor 0.2-0.25 parts, platinum catalyst 0.6-0.7 parts, foaming agent 2-3.5 parts, hydroxyl silicone oil 3-5 parts, hydrogen-containing silicone oil 11-13 parts.

[0011] Preferably, the viscosity of the vinyl silicone oil is 1000-3000 mPa-s (25℃), and the vinyl content is 0.1-0.4 wt%.

[0012] Preferably, the reinforcing filler consists of carbon black and white carbon black, and the specific surface area of the white carbon black is 200-400 m 2 / g, including but not limited to one or more of 200, 300, 400 m 2 / g.

[0013] Preferably, the weight ratio of the carbon black and the white carbon black is 1-2:8-15.

[0014] Preferably, the flame-retardant filler is one or more of aluminum hydroxide, zinc oxide, zinc borate, magnesium hydroxide.

[0015] Preferably, in some embodiments, the flame-retardant filler consists of aluminum hydroxide, magnesium hydroxide in a weight ratio of 15-20:10-20.

[0016] Preferably, in some embodiments, the flame-retardant filler consists of aluminum hydroxide, magnesium hydroxide, zinc borate in a weight ratio of 15-20:10-20:5-10.

[0017] Preferably, in some embodiments, the flame-retardant filler consists of magnesium hydroxide, zinc oxide in a weight ratio of 10-20:5-10.

[0018] Preferably, the contact poison is one or more of pyrethroid, neonicotinoid, phenylpyrazole, boric acid, glycine, erythritol, fipronil.

[0019] Preferably, in some embodiments, the contact poison consists of glycine, erythritol in a weight ratio of 0.02-0.04:0.06-0.08.

[0020] Preferably, the decoy agent is one or more of diatomaceous earth, talcum powder, capsaicin, dihydrocapsaicin, denatonium benzoate.

[0021] Preferably, the odorant is one or more of camphor oil, peppermint oil, limonin, limonene, citral, decanal, octanal, nonanal.

[0022] Preferably, the structure control agent is one or more of diphenylsilanediol, alpha, omega-dihydroxypolydimethylsiloxane, dialkyldialkoxy silane.

[0023] Preferably, the inhibitor is one or more of 2-methyl-3-butyn-2-ol, 1-ethynylcyclohexanol, tetramethyltetraethenylcyclotetrasiloxane, diallyl maleate.

[0024] Preferably, in some embodiments the inhibitor consists of tetramethyltetra vinylcyclotetrasiloxane, diallyl maleate in a weight ratio of 0.1-0.2:0.1-0.2.

[0025] Preferably, the platinum catalyst comprises at least one of platinum compounds, including but not limited to platinum aquo-complex, chloroplatinic acid or platinum complex.

[0026] Preferably, the foaming agent is one or more of water, ethanol, n-propanol, n-butanol, amyl alcohol.

[0027] Preferably, the viscosity of the hydroxyl silicone oil is 10-40mm 2 / s (25℃), and the hydroxyl content is 6-12wt%.

[0028] Preferably, the viscosity of the hydrogen-containing silicone oil is 100-300mm 2 / s (25℃), and the hydrogen content is 1.0-1.6wt%.

[0029] Preferably, the raw material formula of the anti-termite sealing material of the silica aerogel foam further comprises a synergistic filler; preferably, the addition amount of the synergistic filler is 4-8 parts by weight.

[0030] In the preparation process of the synergistic filler, first, the chitosan is protonated in acetic acid and cross-linked with the phosphate groups of phytic acid through electrostatic interaction, and the Ca 2+ and the phosphate groups of phytic acid, forming a three-dimensional network framework. Heating promotes the thermal motion of chitosan molecular chains, enhancing the bridging effect of phytic acid. After drying, a micron-nanometer level through-porous structure is formed, which combines the rigid support of hydroxyapatite and the toughness of chitosan-phytic acid network, laying a foundation for subsequent drug loading and mechanical enhancement. Second, capsaicin and matrine penetrate into the porous carrier, vacuum impregnation forces the drug solution into the deep pores, and the drug molecules are anchored on the pore wall through hydrogen bonds and van der Waals forces. The epoxy ring-opening reaction of polymethylsilsesquioxane and epoxy-terminated silicone oil occurs under the catalysis of triethylamine, forming a dense cross-linked network on the surface of the carrier, achieving the effect of drug release. Capsaicin stimulates insect chemoreceptors, and matrine interferes with nerve conduction, achieving the dual effect of repelling ants. The inorganic framework (Si-O-Si) of polymethylsilsesquioxane provides rigid support, and the flexible long chain of epoxy-terminated silicone oil provides elasticity. When the sealing material is compressed, the silicone layer absorbs energy through reversible deformation, and the epoxy cross-linking points limit the sliding of molecular chains, reducing permanent deformation. In addition, the nano-hydroxyapatite in the porous carrier acts as a "hard point" to resist compression, and the chitosan-phytic acid network restructures through hydrogen bonds to dissipate stress. The surface silicone coating layer restores its shape by relying on elasticity after the stress is removed, and the two work together to achieve high resilience and low compression permanent deformation.

[0031] In summary, the synergistic filler provides drug storage and primary mechanical skeleton through the inner porous carrier, the surface siloxane coating layer realizes the controlled release and interface strengthening of the ant-proof synergistic component, the nano-hydroxyapatite enhances, the chitosan-phytic acid network toughens, the siloxane crosslinking network elastically recovers, and the synergistic effect makes the sealing material have excellent mechanical stability when preventing ant attack.

[0032] Preferably, the ant-eating-proof silica aerogel sealing material comprises the following raw materials in parts by weight:

[0033] Vinyl silicone oil 40-50 parts, reinforcing filler 19-30 parts, flame-retardant filler 50-60 parts, contact killing agent 0.12-0.16 parts, bait agent 4-8 parts, odorant 1-1.2 parts, structure control agent 2-8 parts, inhibitor 0.2-0.25 parts, platinum catalyst 0.6-0.7 parts, foaming agent 2-3.5 parts, hydroxyl silicone oil 3-5 parts, hydrogen-containing silicone oil 11-13 parts, synergistic filler 4-8 parts.

[0034] Preferably, the preparation method of the synergistic filler is as follows:

[0035] The nano-hydroxyapatite is added into water and ultrasonically dispersed to obtain a hydroxyapatite suspension; the chitosan is dissolved in an acetic acid solution, the phytic acid is added and stirred; the above-mentioned hydroxyapatite suspension is added, heated and stirred, centrifuged, and dried to obtain a porous carrier.

[0036] The capsaicin and matrine are dissolved in methanol to obtain a synergistic liquid; the porous carrier is immersed in the above-mentioned synergistic liquid, vacuum impregnated and adsorbed, rotary evaporated, and dried to obtain a drug-loaded porous carrier.

[0037] The polymethylsilsesquioxane and epoxy-terminated silicone oil are dissolved in isopropyl alcohol, triethylamine and the drug-loaded porous carrier are added, heated and stirred, filtered, and dried to obtain the synergistic filler.

[0038] Preferably, the weight ratio of the nano-hydroxyapatite, chitosan and phytic acid is 3-8:2-4:0.5-1.5.

[0039] Preferably, the weight ratio of the capsaicin, matrine and porous carrier is 0.5-0.7:0.3-0.5:5-10.

[0040] Preferably, the weight ratio of the polymethylsilsesquioxane, epoxy-terminated silicone oil, triethylamine and drug-loaded porous carrier is 1-3:0.5-2:0.04-0.06:5-10.

[0041] Preferably, the preparation method of the synergistic filler is as follows:

[0042] According to parts by weight, 3-8 parts of nano-hydroxyapatite is added into 70-150 parts of water, and ultrasonic dispersion is carried out for 20-40 min to obtain a hydroxyapatite suspension; 2-4 parts of chitosan is dissolved in 100-200 parts of 1-3 wt% acetic acid solution, 0.5-1.5 parts of phytic acid is added, and stirring is carried out at 20-30 ℃ and 100-300 rpm for 20-40 min; then the above-mentioned hydroxyapatite suspension is added, the temperature is increased to 55-70 ℃, and stirring is carried out for 1-3 h, centrifugation, and freeze-drying to obtain a porous carrier;

[0043] 0.5-0.7 parts of capsaicin and 0.3-0.5 parts of matrine are dissolved in 20-40 parts of methanol to obtain a synergistic liquid; 5-10 parts of the porous carrier is immersed in the above-mentioned synergistic liquid, vacuum immersion adsorption is carried out for 1-2 h, the solvent is removed by rotary evaporation, and vacuum drying is carried out to obtain a drug-loaded porous carrier;

[0044] 1-3 parts of polymethylsilsesquioxane and 0.5-2 parts of epoxy-terminated silicone oil are dissolved in 40-60 parts of isopropyl alcohol, 0.04-0.06 parts of triethylamine and 5-10 parts of the drug-loaded porous carrier are added, stirring is carried out at 40-50 ℃ and 100-300 rpm for 2-4 h, filtration is carried out, and vacuum drying is carried out to obtain a synergistic filler.

[0045] Preferably, the average particle size of the nano-hydroxyapatite is 10-100 nm.

[0046] Preferably, the average molecular weight of the chitosan is 10000-30000, and the degree of deacetylation is ≥95%.

[0047] Preferably, the CAS number of the polymethylsilsesquioxane is 68554-70-1.

[0048] Preferably, the viscosity of the epoxy-terminated silicone oil is 200-300 cs (25 ℃), and the epoxy value is 0.01-0.03 mol / 100 g.

[0049] Preferably, the frequency of the ultrasonic is 20-40 kHz, and the power is 200-300 W.

[0050] Preferably, the conditions of the vacuum immersion adsorption are -0.1 to -0.05 MPa and 34-50 ℃.

[0051] Preferably, the temperature of the rotary evaporation is 40-50 ℃.

[0052] The application also provides a preparation method of the ant-termite-eating silica gel foam sealing material.

[0053] Step S1: Mix part (1 / 2 recipe amount) of vinyl silicone oil, reinforcing filler, flame retardant filler, contact poison, decoy agent, odor agent, structure control agent and inhibitor, platinum catalyst and add into planetary mixer, mix evenly as A component;

[0054] Step S2: Mix the remaining (1 / 2 recipe amount) of vinyl silicone oil, reinforcing filler, flame retardant filler, contact poison, decoy agent, odor agent, structure control agent and foaming agent, hydroxyl silicone oil, hydrogen-containing silicone oil and add into planetary mixer, mix evenly as B component;

[0055] Step S3: Pour A component, B component into constant temperature tank, stir, extrude on calender line, solidify and form to obtain the ant-proof silicone foam sealing material.

[0056] Preferably, the rotation speed of the planetary mixer in step S1, S2 is 50-60 rpm.

[0057] Preferably, the A component, B component in step S3 is poured into the constant temperature tank at a weight ratio of 1-2:1-2.

[0058] Preferably, the temperature of the constant temperature tank in step S3 is set to 20-25℃, and stirred at 1000-3000 rpm for 40-60 s.

[0059] Preferably, the solidification and forming temperature in step S3 is 90-110℃, and the time is 3-5 min.

[0060] Preferably, in step S2, the synergistic filler is mixed with other raw materials evenly as B component, and other steps are the same.

[0061] Preferably, a method for preparing an ant-proof silicone foam sealing material comprises the following steps:

[0062] Step S1: Mix part (1 / 2 recipe amount) of vinyl silicone oil, reinforcing filler, flame retardant filler, contact poison, decoy agent, odor agent, structure control agent and inhibitor, platinum catalyst and add into planetary mixer, mix evenly as A component;

[0063] Step S2: Mix the remaining (1 / 2 recipe amount) of vinyl silicone oil, reinforcing filler, flame retardant filler, contact poison, decoy agent, odor agent, structure control agent and foaming agent, hydroxyl silicone oil, hydrogen-containing silicone oil, synergistic filler and add into planetary mixer, mix evenly as B component;

[0064] Step S3: Pour A component, B component into constant temperature tank, stir, extrude on calender line, solidify and form to obtain the ant-proof silicone foam sealing material.

[0065] Compared with the prior art, the application has the advantages and beneficial effects that:

[0066] The application provides an anti-termite sealing material made of silica gel foam and a preparation method thereof. By introducing a contact poison, a lure poison and an odor agent, termites can be kept away from the sealing material due to strong or sensitive odors, or the taste and toxicity of the sealing material can be triggered after the termites bite the sealing material, so that other termites are effectively prevented from continuing to bite the sealing material through inter-group information transmission. The contact poison, the lure poison and the odor agent have good compatibility with the silicone rubber, have little influence on the sealing performance of the sealing material, and meet the environmental protection requirements. DETAILED DESCRIPTION

[0067] The technical solutions in the embodiments of the application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the application.

[0068] The raw materials used in the embodiments and the comparative examples of the application are obtained from self-preparation or commercial purchase, but are not limited to the following materials:

[0069] Vinyl silicone oil: viscosity of 1500 mPa·s (25 DEG C.), vinyl content of 0.23 wt%, purchased from Jiangsu Kexing New Material Co., Ltd.

[0070] Fumed silica: specific surface area of 200 g / m 2 , purchased from Zhejiang Fuji Special Material Group Co., Ltd.

[0071] Fumed silica: specific surface area of 400 g / m 2 , purchased from Zhejiang Fuji Special Material Group Co., Ltd.

[0072] Hydroxyl silicone oil: hydroxyl content of 6 wt%, viscosity of 40 mm 2 / s (25 DEG C.), purchased from Jiangxi Silicon Biochemical Co., Ltd.

[0073] Hydroxyl silicone oil: hydroxyl content of 8 wt%, viscosity of 40 mm 2 / s (25 DEG C.), purchased from Jiangxi Silicon Biochemical Co., Ltd.

[0074] Hydroxyl silicone oil: hydroxyl content of 12 wt%, viscosity of 40 mm 2 / s (25 DEG C.), purchased from Jiangxi Silicon Biochemical Co., Ltd.

[0075] Hydrogen-containing silicone oil: hydrogen content of 1.4 wt%, viscosity of 150 mm 2 / s (25 DEG C.), purchased from Shandong Longhui Chemical Co., Ltd.

[0076] Hydrogen-containing silicone oil: hydrogen content 1.6wt%, viscosity 150mm 2 / s (25℃), purchased from Shandong Longhui Chemical Co., Ltd.

[0077] Nano-hydroxyapatite: average particle size 20nm, purchased from Suzhou Yongqinquan Intelligent Equipment Co., Ltd.

[0078] Chitosan: average molecular weight 20000, degree of deacetylation ≥95%, purchased from Shenzhen Lijing Biochemical Technology Co., Ltd.

[0079] Polymethylsilsesquioxane: CAS number 68554-70-1, purchased from Zhongshan Dixin Chemical Co., Ltd.

[0080] Epoxy-terminated silicone oil: viscosity 250cs (25℃), epoxy value 0.02mol / 100g, purchased from Jiaxing Lianhe Chemical Co., Ltd.

[0081] Mildew-proof coating: model 9512-Y, purchased from Beijing Calidry Technology Development Co., Ltd.

[0082] Example 1

[0083] The present embodiment provides an ant-eating-resistant silica aerocotton sealing material, which comprises the following raw materials in parts by weight:

[0084] Vinyl silicone oil 40 parts, reinforcing filler 22 parts, flame-retardant filler 60 parts, contact killing agent 0.12 parts, bait agent 8 parts, odor agent 1.2 parts, structure control agent 2 parts, inhibitor 0.2 parts, platinum catalyst 0.6 parts, foaming agent 3 parts, hydroxy silicone oil (hydroxyl content 6wt%, viscosity 40mm 2 / s) 5 parts, hydrogen-containing silicone oil (hydrogen content 1.4wt%, viscosity 150mm 2 / s) 12 parts.

[0085] The reinforcing filler is composed of carbon black and fumed silica (specific surface area 200g / m 2 ) in a weight ratio of 1:10.

[0086] The flame-retardant filler is composed of aluminum hydroxide, magnesium hydroxide, and zinc borate in a weight ratio of 15:10:5.

[0087] The contact killing agent is a pyrethroid (high-efficiency cypermethrin).

[0088] The bait agent is diatomite.

[0089] The odor agent is camphor oil.

[0090] The foaming agent is water.

[0091] The structure control agent is α, ω-dihydroxypolydimethylsiloxane.

[0092] The inhibitor is tetramethyltetravinylcyclotetrasiloxane.

[0093] The platinum catalyst is chloroplatinic acid.

[0094] A preparation method of an ant termite bite silicon foam sealing material, comprising the following steps:

[0095] Step S1: 20 parts of vinyl silicone oil, 11 parts of reinforcing filler, 30 parts of flame-retardant filler, 0.06 parts of contact killing agent, 4 parts of bait agent, 0.6 parts of odor agent, 1 part of structure control agent, 0.2 parts of inhibitor, 0.6 parts of platinum catalyst, are mixed and added to a planetary mixer, and mixed uniformly at a speed of 50 rpm as A component;

[0096] Step S2: another part of 20 parts of vinyl silicone oil, 11 parts of reinforcing filler, 30 parts of flame-retardant filler, 0.06 parts of contact killing agent, 4 parts of bait agent, 0.6 parts of odor agent, 1 part of structure control agent, 3 parts of foaming agent, 5 parts of hydroxyl silicone oil, and 12 parts of hydrogen-containing silicone oil are mixed and added to a planetary mixer, and mixed uniformly at a speed of 50 rpm as B component;

[0097] Step S3: A component and B component are poured into a constant temperature tank at a weight ratio of 1:1, the temperature is set to 20°C, stirred at 1000 rpm for 60 s, extruded on a calender line, and cured and formed at a temperature of 100°C for 4 min to obtain an ant termite bite silicon foam sealing material.

[0098] Example 2

[0099] The present embodiment provides an ant termite bite silicon foam sealing material, which comprises the following raw materials in parts by weight:

[0100] 44 parts of vinyl silicone oil, 19 parts of reinforcing filler, 60 parts of flame-retardant filler, 0.14 parts of contact killing agent, 4 parts of bait agent, 1 part of odor agent, 3 parts of structure control agent, 0.25 parts of inhibitor, 0.7 parts of platinum catalyst, 3.5 parts of foaming agent, 3 parts of hydroxyl silicone oil (hydroxyl content 8wt%, viscosity 40mm 2 / s), and 11 parts of hydrogen-containing silicone oil (hydrogen content 1.6wt%, viscosity 150mm 2 / s).

[0101] The reinforcing filler is composed of carbon black and fumed silica (specific surface area 400g / m 2 ) at a weight ratio of 1.5:8.

[0102] The flame-retardant filler is composed of aluminum hydroxide and magnesium hydroxide at a weight ratio of 20:10.

[0103] The contact pesticide is a phenylpyrazole (flufenicol).

[0104] The bait is benzyldenafil.

[0105] The flavoring agent is limonene.

[0106] The foaming agent is n-propanol.

[0107] The structure control agent is dialkyldialkoxysilane.

[0108] The inhibitor is tetramethyltetravinylcyclotetrasiloxane.

[0109] The platinum catalyst is a platinum complex.

[0110] A method for preparing an ant-proof silicone foam sealing material includes the following steps:

[0111] Step S1: Mix 22 parts of vinyl silicone oil, 9.5 parts of reinforcing filler, 30 parts of flame retardant filler, 0.07 parts of contact killer, 2 parts of bait, 0.5 parts of odorant, 1.5 parts of structure control agent, 0.25 parts of inhibitor, and 0.7 parts of platinum catalyst, and add them to a planetary mixer. Mix them evenly at 50 rpm to obtain component A.

[0112] Step S2: Mix another portion of 22 parts vinyl silicone oil, 9.5 parts reinforcing filler, 30 parts flame retardant filler, 0.07 parts contact killer, 2 parts bait, 0.5 parts odorant, 1.5 parts structure control agent, 3.5 parts foaming agent, 3 parts hydroxyl silicone oil, and 11 parts hydrogen-containing silicone oil and add them to a planetary mixer. Mix evenly at 50 rpm to form Component B.

[0113] Step S3: Pour components A and B into a constant temperature container at a weight ratio of 1:1, set the temperature to 20℃, stir at 1500 rpm for 60 seconds, extrude on a calender line, and cure at 100℃ for 4 minutes to obtain an ant-proof silicone foam sealing material.

[0114] Example 3

[0115] This embodiment provides a silicone foam sealing material that prevents ant damage, comprising the following raw materials by weight:

[0116] 50 parts vinyl silicone oil, 30 parts reinforcing filler, 50 parts flame retardant filler, 0.16 parts contact ant, 6 parts bait agent, 1.2 parts odorant, 8 parts structure control agent, 0.2 parts inhibitor, 0.6 parts platinum catalyst, 2 parts foaming agent, hydroxyl silicone oil (hydroxyl content 12wt%, viscosity 40mm). 2 3 parts of hydrogen-containing silicone oil (hydrogen content 1.4wt%, viscosity 150mm) 2 13 copies (s)

[0117] The reinforcing filler is composed of carbon black, fumed silica (specific surface area 200 g / m 2 ), fumed silica (specific surface area 400 g / m 2 ) in a weight ratio of 1:10:4.

[0118] The flame-retardant filler is composed of magnesium hydroxide, zinc oxide in a weight ratio of 20:5.

[0119] The contact-killing agent is composed of glycine, erythritol in a weight ratio of 0.02:0.06.

[0120] The decoy agent is talc powder.

[0121] The odor agent is decanal.

[0122] The foaming agent is ethanol.

[0123] The structure control agent is diphenylsilanediol.

[0124] The inhibitor is composed of tetramethyltetavinylcyclotetrasiloxane, diallyl maleate in a weight ratio of 0.1:0.1.

[0125] The platinum catalyst is platinum gold water.

[0126] A preparation method of an ant termite feeding silica foam sealing material, comprising the following steps:

[0127] Step S1: 25 parts of vinyl silicone oil, 15 parts of reinforcing filler, 25 parts of flame-retardant filler, 0.08 parts of contact-killing agent, 3 parts of decoy agent, 0.6 parts of odor agent, 4 parts of structure control agent, 0.2 parts of inhibitor, and 0.6 parts of platinum catalyst are mixed and added to a planetary mixer, and mixed uniformly at a speed of 50 rpm to serve as component A;

[0128] Step S2: another 25 parts of vinyl silicone oil, 15 parts of reinforcing filler, 25 parts of flame-retardant filler, 0.08 parts of contact-killing agent, 3 parts of decoy agent, 0.6 parts of odor agent, 4 parts of structure control agent, 2 parts of foaming agent, 3 parts of hydroxyl silicone oil, and 13 parts of hydrogen-containing silicone oil are mixed and added to a planetary mixer, and mixed uniformly at a speed of 50 rpm to serve as component B;

[0129] Step S3: components A and B are poured into a constant-temperature tank in a weight ratio of 1:1, the temperature is set to 20℃, stirring is carried out at 1800 rpm for 60 s, and the mixture is extruded on a calender line at a temperature of 110℃, and cured for 3 min to form an ant termite feeding silica foam sealing material.

[0130] Example 4

[0131] The embodiment is different from the embodiment 1 in that 4 parts by weight of the synergistic filler is added in the raw material formula of the ant-proof silica gel foam sealing material; correspondingly, 4 parts by weight of the synergistic filler is mixed with other raw materials uniformly as the B component in the step S2, and other steps are the same.

[0132] The preparation method of the synergistic filler is as follows:

[0133] The nano-hydroxyapatite (average particle size 20 nm) is added into water 100 parts by weight, and ultrasonic dispersion is carried out at an ultrasonic frequency of 40 kHz and a power of 300 W for 30 min to obtain a hydroxyapatite suspension; the chitosan (average molecular weight 20000, deacetylation degree ≥95%) is dissolved in 2wt% acetic acid solution 100 parts, and the phytic acid 1 part is added, and stirred at 25℃ and 200 rpm for 30 min; then the above hydroxyapatite suspension is added, and stirred at 60℃ for 2 h, centrifuged, and freeze-dried to obtain a porous carrier.

[0134] The capsaicin 0.6 parts and the matrine 0.4 parts are dissolved in methanol 30 parts to obtain a synergistic liquid; the porous carrier 8 parts is immersed in the above synergistic liquid, vacuum impregnation adsorption is carried out at -0.09 MPa and 40℃ for 1 h, the solvent is removed by rotary evaporation at 45℃, and vacuum drying is carried out to obtain a drug-loaded porous carrier.

[0135] The polymethylsilsesquioxane 2 parts and the epoxy-terminated silicone oil (viscosity 250 cs, epoxy value 0.02 mol / 100 g) 1 part are dissolved in isopropyl alcohol 50 parts, and the triethylamine 0.05 parts and the drug-loaded porous carrier 8 parts are added, and stirred at 45℃ and 200 rpm for 3 h, filtered, and vacuum dried to obtain the synergistic filler.

[0136] Example 5

[0137] The embodiment is different from the embodiment 2 in that 5 parts by weight of the synergistic filler is added in the raw material formula of the ant-proof silica gel foam sealing material; correspondingly, 5 parts by weight of the synergistic filler is mixed with other raw materials uniformly as the B component in the step S2, and other steps are the same.

[0138] The preparation method of the synergistic filler is as follows:

[0139] The nano-hydroxyapatite (average particle size 20 nm) is added into water 100 parts by weight, and ultrasonic dispersion is carried out at an ultrasonic frequency of 40 kHz and a power of 300 W for 30 min to obtain a hydroxyapatite suspension; the chitosan (average molecular weight 20000, deacetylation degree ≥95%) is dissolved in 2wt% acetic acid solution 100 parts, and the phytic acid 1 part is added, and stirred at 25℃ and 200 rpm for 30 min; then the above hydroxyapatite suspension is added, and stirred at 60℃ for 2 h, centrifuged, and freeze-dried to obtain a porous carrier.

[0140] Capsaicin 0.6 parts and matrine 0.4 parts were dissolved in methanol 30 parts to obtain a synergistic solution; porous carrier 8 parts was immersed in the above synergistic solution, vacuum impregnation adsorption was carried out at -0.09 MPa and 40°C for 1 h, the solvent was removed by rotary evaporation at 45°C, and vacuum drying was carried out to obtain a drug-loaded porous carrier;

[0141] Polymethylsilsesquioxane 2 parts and epoxy-terminated silicone oil (viscosity 250 cs, epoxy value 0.02 mol / 100 g) 1 part were dissolved in isopropyl alcohol 50 parts, triethylamine 0.05 parts and drug-loaded porous carrier 8 parts were added, stirring was carried out at 45°C and 200 rpm for 3 h, filtration was carried out, and vacuum drying was carried out to obtain a synergistic filler.

[0142] Example 6

[0143] Compared with Example 3, the difference of the present example is that 8 parts by weight of synergistic filler is added to the raw material formula of the ant termite feeding silicon gel foam sealing material; correspondingly, 8 parts by weight of synergistic filler is mixed with other raw materials uniformly as component B in step S2, and other steps are the same.

[0144] The preparation method of the synergistic filler is as follows:

[0145] Nanometer hydroxyapatite (average particle size 20 nm) 5 parts was added to water 100 parts, ultrasonic dispersion was carried out at ultrasonic frequency 40 kHz and power 300 W for 30 min to obtain a hydroxyapatite suspension; chitosan (average molecular weight 20000, deacetylation degree ≥95%) 3 parts was dissolved in 2wt% acetic acid solution 100 parts, phytic acid 1 part was added, stirring was carried out at 25°C and 200 rpm for 30 min; the above hydroxyapatite suspension was added, the temperature was raised to 60°C, stirring was carried out for 2 h, centrifugation was carried out, and freeze-drying was carried out to obtain a porous carrier;

[0146] Capsaicin 0.6 parts and matrine 0.4 parts were dissolved in methanol 30 parts to obtain a synergistic solution; porous carrier 8 parts was immersed in the above synergistic solution, vacuum impregnation adsorption was carried out at -0.09 MPa and 40°C for 1 h, the solvent was removed by rotary evaporation at 45°C, and vacuum drying was carried out to obtain a drug-loaded porous carrier;

[0147] Polymethylsilsesquioxane 2 parts and epoxy-terminated silicone oil (viscosity 250 cs, epoxy value 0.02 mol / 100 g) 1 part were dissolved in isopropyl alcohol 50 parts, triethylamine 0.05 parts and drug-loaded porous carrier 8 parts were added, stirring was carried out at 45°C and 200 rpm for 3 h, filtration was carried out, and vacuum drying was carried out to obtain a synergistic filler.

[0148] Comparative Example 1

[0149] This comparative example is a blank example compared to Example 1. The difference is that the contact killer, bait, and odorant in Example 1 are not added, while the other steps are the same.

[0150] Comparative Example 2

[0151] The difference between this comparative example and Example 1 is that the contact insecticide, bait, and odorant in Example 1 are not added, and a commercially available anti-mildew coating is applied to the surface of the sealing material. All other steps are the same.

[0152] Comparative Example 3

[0153] This comparative example is a blank example, and the difference between it and Example 4 is that the preparation method of the synergistic filler is different, as follows: The preparation method of the synergistic filler is as follows:

[0154] By weight, 5 parts of nano-hydroxyapatite (average particle size of 20 nm) were added to 100 parts of water and ultrasonically dispersed for 30 min at an ultrasonic frequency of 40 kHz and a power of 300 W to obtain a hydroxyapatite suspension. 3 parts of chitosan (average molecular weight of 20,000 and degree of deacetylation ≥95%) were dissolved in 100 parts of 2 wt% acetic acid solution, and 1 part of phytic acid was added. The mixture was stirred at 25 °C and 200 rpm for 30 min. The above hydroxyapatite suspension was then added, the mixture was heated to 60 °C and stirred for 2 h, centrifuged, and freeze-dried to obtain a porous carrier.

[0155] 0.6 parts capsaicin and 0.4 parts matrine were dissolved in 30 parts methanol to obtain a synergistic solution. 8 parts of porous carrier were impregnated in the above synergistic solution and vacuum impregnated and adsorbed at -0.09 MPa and 40℃ for 1 h. The solvent was removed by rotary evaporation at 45℃ and vacuum dried to obtain the synergistic filler.

[0156] Performance testing

[0157] The silicone foam sealing materials prepared in Examples 1-6 and Comparative Examples 1-3 were used respectively. Samples of the silicone foam sealing materials were made into 100mm × 100mm × 3mm pieces, and the compression rebound stress and compression deformation rate were tested according to ASTM D1056. Samples of the silicone foam sealing materials were also made into 100mm × 100mm × 3mm pieces, and the vertical flammability was tested according to UL-94. Samples of the silicone foam sealing materials were made into 20mm × 20mm × 3mm pieces and placed in a rodent / insect / ant test chamber for 5 days to evaluate the degree of damage from bites. The test results are shown in Table 1.

[0158] Table 1: Performance Test Results of Silicone Foam Sealing Materials

[0159]

[0160] From the test results, compared with the comparative examples 1-3, compared with the comparative example 1 without adding the repellent, the bait and the odor, the comparative example 2 without adding the repellent, the bait and the odor but coated with the commercially available mildew-proof coating (the flame-retardant performance is reduced, and the effect of driving or killing the rodents and ants is limited), the examples 1-3 can effectively improve the anti-ant-eating performance of the sealing material by directly adding the repellent, the bait and the odor in the sealing material, but the compression resilience and the compression deformation resistance are slightly reduced; therefore, based on the raw material formula of the examples 1-3, by adding the synergistic filler of a specific method (compared with the comparative example 3, the different synergistic filler cannot achieve the same effect), the examples 4-6 can further improve the anti-ant-eating performance of the sealing material in cooperation with other components in the raw material formula, and make the sealing material have excellent flame-retardant performance, compression resilience and compression deformation resistance, which is more conducive to protecting the integrity of the sealing material. Through the above comparison, it is proved that the technical scheme defined in the application is important for the technical effect.

[0161] The above is the preferred embodiment of the present application, it should be pointed out that for the ordinary skilled in the art, without departing from the principles of the present application, can also make several improvements and refinements, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A silicone foam sealing material for preventing ant gnawing, characterized in that, By weight, it includes the following ingredients: The composition includes 30-50 parts vinyl silicone oil, 10-30 parts reinforcing filler, 40-80 parts flame retardant filler, 0.02-0.2 parts contact anticide, 2-20 parts bait agent, 0.2-2 parts odorant, 2-8 parts structure control agent, 0.1-0.3 parts inhibitor, 0.3-0.7 parts platinum catalyst, 1-5 parts foaming agent, 2-6 parts hydroxyl silicone oil, 5-15 parts hydrogen-containing silicone oil, and 4-8 parts by weight of synergistic filler. The preparation method of the synergistic filler is as follows: Nano-hydroxyapatite was added to water and ultrasonically dispersed to obtain a hydroxyapatite suspension; chitosan was dissolved in acetic acid solution, phytic acid was added and stirred; then the above hydroxyapatite suspension was added, heated and stirred, centrifuged, and dried to obtain a porous carrier. Capsaicin and matrine were dissolved in methanol to obtain a synergistic solution; a porous carrier was impregnated in the above synergistic solution, vacuum impregnated and adsorbed, rotary evaporated, and dried to obtain a drug-loaded porous carrier. Polymethylsilsesquioxane and terminal epoxy silicone oil were dissolved in isopropanol, and triethylamine and drug-loaded porous carrier were added. The mixture was heated and stirred, filtered, and dried to obtain the synergistic filler.

2. The silicone foam sealing material for preventing ant gnawing according to claim 1, characterized in that, The contact insecticide is one or more of pyrethroids, neonicotinoids, phenylpyrazoles, and boric acid; the bait is one or more of diatomaceous earth, talc, capsaicin, dihydrocapsaicin, and benzalkonium chloride; and the odorant is one or more of camphor oil, peppermint oil, limonene, limonene, citral, decanal, octanal, and nonanal.

3. The silicone foam sealing material for preventing termite infestation according to claim 1, characterized in that, The reinforcing filler is composed of carbon black and silica; the flame-retardant filler is one or more of aluminum hydroxide, zinc oxide, zinc borate, and magnesium hydroxide.

4. The silicone foam sealing material for preventing ant gnawing according to claim 1, characterized in that, The structure control agent is one or more of diphenylsilanediol, α,ω-dihydroxypolydimethylsiloxane, and dialkyldialkoxysilane; the inhibitor is one or more of 2-methyl-3-butyn-2-ol, 1-ethynylcyclohexanol, tetramethyltetravinylcyclotetrasiloxane, and diallyl maleate.

5. The silicone foam sealing material for preventing ant gnawing according to claim 1, characterized in that, The platinum catalyst includes at least one platinum compound, including platinum water, chloroplatinic acid, or a platinum complex; the foaming agent is one or more of water, ethanol, n-propanol, n-butanol, and pentanol.

6. The silicone foam sealing material for preventing ant gnawing according to claim 1, characterized in that, The vinyl silicone oil has a viscosity of 1000-3000 mPa·s and a vinyl content of 0.1-0.4 wt%; the hydroxyl silicone oil has a viscosity of 10-40 mm. 2 / s, hydroxyl content is 6-12wt%; the viscosity of the hydrogen-containing silicone oil is 100-300mm. 2 / s, with a hydrogen content of 1.0-1.6wt%.

7. The silicone foam sealing material for preventing termite infestation according to claim 1, characterized in that, The weight ratio of nano-hydroxyapatite, chitosan, and phytic acid is 3-8:2-4:0.5-1.5; the weight ratio of capsaicin, matrine, and porous carrier is 0.5-0.7:0.3-0.5:5-10; and the weight ratio of polymethylsilsesquioxane, terminal epoxy silicone oil, triethylamine, and drug-loaded porous carrier is 1-3:0.5-2:0.04-0.06:5-10.

8. A method for preparing the ant-proof silicone foam sealing material according to any one of claims 1-7, characterized in that, Includes the following steps: Step S1: Mix a portion of vinyl silicone oil, reinforcing filler, flame retardant filler, contact killer, bait agent, odorant, structure control agent and inhibitor, and platinum catalyst in a planetary mixer and mix evenly to form component A. Step S2: Mix the remaining vinyl silicone oil, reinforcing filler, flame retardant filler, contact killer, bait agent, odorant, structure control agent and foaming agent, hydroxyl silicone oil, hydrogen-containing silicone oil and synergistic filler and add them to a planetary mixer, mix them evenly as component B. Step S3: Pour components A and B into a constant temperature container, stir, extrude on a calendering line, and solidify to obtain an ant-proof silicone foam sealing material.

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