CN115386293A - Sprayable silicone adhesive for power equipment and preparation method thereof - Google Patents
Sprayable silicone adhesive for power equipment and preparation method thereof Download PDFInfo
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- CN115386293A CN115386293A CN202211155308.4A CN202211155308A CN115386293A CN 115386293 A CN115386293 A CN 115386293A CN 202211155308 A CN202211155308 A CN 202211155308A CN 115386293 A CN115386293 A CN 115386293A
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- 239000013464 silicone adhesive Substances 0.000 title claims abstract description 81
- 238000002360 preparation method Methods 0.000 title claims abstract description 11
- 239000003085 diluting agent Substances 0.000 claims abstract description 13
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 12
- 239000000945 filler Substances 0.000 claims abstract description 12
- 239000000440 bentonite Substances 0.000 claims abstract description 6
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 6
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 6
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 6
- 239000004205 dimethyl polysiloxane Substances 0.000 claims abstract description 6
- 229920000435 poly(dimethylsiloxane) Polymers 0.000 claims abstract description 6
- -1 polydimethylsiloxane Polymers 0.000 claims abstract description 6
- UKLDJPRMSDWDSL-UHFFFAOYSA-L [dibutyl(dodecanoyloxy)stannyl] dodecanoate Chemical compound CCCCCCCCCCCC(=O)O[Sn](CCCC)(CCCC)OC(=O)CCCCCCCCCCC UKLDJPRMSDWDSL-UHFFFAOYSA-L 0.000 claims abstract description 3
- 239000012975 dibutyltin dilaurate Substances 0.000 claims abstract description 3
- AMTWCFIAVKBGOD-UHFFFAOYSA-N dioxosilane;methoxy-dimethyl-trimethylsilyloxysilane Chemical compound O=[Si]=O.CO[Si](C)(C)O[Si](C)(C)C AMTWCFIAVKBGOD-UHFFFAOYSA-N 0.000 claims abstract description 3
- ORRNVHHOEJMPDQ-UHFFFAOYSA-N ethoxy-hydroxy-dimethoxysilane Chemical compound CCO[Si](O)(OC)OC ORRNVHHOEJMPDQ-UHFFFAOYSA-N 0.000 claims abstract description 3
- 238000002156 mixing Methods 0.000 claims abstract description 3
- 229940083037 simethicone Drugs 0.000 claims abstract description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims description 40
- 239000010410 layer Substances 0.000 claims description 22
- 238000003756 stirring Methods 0.000 claims description 22
- 239000000725 suspension Substances 0.000 claims description 22
- 239000003208 petroleum Substances 0.000 claims description 20
- 238000007789 sealing Methods 0.000 claims description 18
- 238000005303 weighing Methods 0.000 claims description 18
- 235000011837 pasties Nutrition 0.000 claims description 12
- 229910052582 BN Inorganic materials 0.000 claims description 11
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims description 11
- 239000007921 spray Substances 0.000 claims description 10
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910021389 graphene Inorganic materials 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 229920002545 silicone oil Polymers 0.000 claims description 4
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 4
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 claims description 2
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 2
- 229920002554 vinyl polymer Polymers 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 20
- 239000011521 glass Substances 0.000 description 14
- 239000000463 material Substances 0.000 description 8
- 238000009210 therapy by ultrasound Methods 0.000 description 8
- 238000011056 performance test Methods 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000032683 aging Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 229910018557 Si O Inorganic materials 0.000 description 1
- 229910002808 Si–O–Si Inorganic materials 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/20—Diluents or solvents
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Inorganic Chemistry (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
The invention relates to the technical field of power equipment, and particularly discloses a sprayable silicone adhesive for power equipment and a preparation method thereof, wherein the sprayable silicone adhesive comprises the following components in parts by weight: 50-60 parts of component A, 50-60 parts of component B, 25-30 parts of diluent and 0-40 parts of filler; the component A is prepared by mixing 30-60 parts of polydimethylsiloxane, 20-50 parts of simethicone, 35-55 parts of nano calcium carbonate, 1-5 parts of organic bentonite and 0.01-1 part of dibutyltin dilaurate, and the viscosity of the component A is 25000-30000cps; the component B consists of 20-50 parts of polydimethylsiloxane, 40-60 parts of nano calcium carbonate, 5-20 parts of methyltrimethoxy siloxane, 1-5 parts of organic bentonite and 3-8 parts of color paste, and the viscosity of the component B is 10000-15000cps. The invention overcomes the defects of the prior art, and the prepared low-viscosity silicone adhesive can be sprayed on the surface of an electronic component to form a uniform and flat insulating layer.
Description
Technical Field
The invention relates to the technical field of power equipment, and particularly belongs to sprayable silicone adhesive for power equipment and a preparation method thereof.
Background
In recent years, based on the continuous development of precise electronic equipment such as mobile phones, computers and the like, electronic device materials gradually become important basic materials of national economy in China, and play a very important role in national defense, industry and civil high-end technologies.
At present, most of insulating layer materials applied to electronic devices in China are epoxy resin, polyurethane and other organic resins, the epoxy resin has the problems of high hardness, easy yellowing, poor impact resistance and poor aging resistance, and the cured insulating layer materials are not high in maintainability; and because of its light transmission, it is not easy to observe when detecting a line fault. Polyurethane has the problem that the switch is easy to malfunction because of the existence of bubbles which are difficult to remove in the actual operation process.
In recent years, silicone adhesive materials have been developed as the most common insulating layer materials for electronic devices, and the silicone adhesive materials have a Si-O-Si main chain structure, and the Si-O skeleton enables the silicone adhesive to have excellent insulating properties, high and low temperature resistance, radiation resistance, aging resistance and the like, so that the silicone adhesive materials are widely applied to the fields of medical equipment, automobile industry, electronic equipment and the like. The silicone adhesive can provide good shockproof buffer for electronic devices due to good flexibility.
The viscosity of the silicone adhesive in the current market is high, the silicone adhesive is difficult to be uniformly coated on the surface of an electronic component, and much time and labor cost are consumed, so that the service life of the electronic component is greatly reduced.
Disclosure of Invention
The invention aims to provide a sprayable silicone adhesive for electrical equipment and a preparation method thereof, overcomes the defects of the prior art, and has the advantages of low viscosity, good insulating property, good heat dissipation performance, controllable thickness and the like.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a sprayable silicone adhesive for power equipment comprises the following components in parts by weight: 50-60 parts of component A, 50-60 parts of component B, 25-30 parts of diluent and 0-40 parts of filler;
the component A is prepared by mixing 30-60 parts of polydimethylsiloxane, 20-50 parts of simethicone, 35-55 parts of nano calcium carbonate, 1-5 parts of organic bentonite and 0.01-1 part of dibutyltin dilaurate, and the viscosity of the component A is 25000-30000cps;
the component B consists of 20-50 parts of polydimethylsiloxane, 40-60 parts of nano calcium carbonate, 5-20 parts of methyltrimethoxy siloxane, 1-5 parts of organic bentonite and 3-8 parts of color paste, and the viscosity of the component B is 10000-15000cps.
Further, the mass ratio of the component A to the component B to the diluent is 2.
Further, the diluent is selected from one or a mixture of 60-90 parts of petroleum ether with the viscosity of 60cps, 30-60 parts of petroleum ether with the viscosity of 60cps, dimethyl silicone oil with the viscosity of 100cps or vinyl silicone oil with the viscosity of 100 cps.
Further, the filler is selected from one of boron nitride or graphene or a mixture of the boron nitride and the graphene.
The invention also provides a preparation method of the sprayable silicone adhesive for the power equipment, which specifically comprises the following steps:
step one, weighing a white pasty component A, a black pasty component B, a diluent and a filler according to parts by weight;
step two, dividing the diluent into two parts, slowly adding the diluent into the group A and the group B respectively, and stirring uniformly to obtain a white solution C and a black solution D;
adding a filler into the white solution C, uniformly stirring, and then performing ultrasonic dispersion under a sealed condition to disperse the filler into the white solution C to obtain a white suspension E;
and step four, slowly adding the black solution D into the white suspension E, uniformly stirring to obtain the silicone adhesive, and sealing the silicone adhesive for later use.
Further, the ultrasonic dispersion time in the third step is 2-4 hours.
Further, the use method of the silicone adhesive comprises the following steps: and transferring the prepared silicone adhesive into a spray can, facing the surface of the electronic component needing to be sprayed with the silicone adhesive, standing and curing for 24 hours to obtain a uniform and flat black silicone adhesive layer.
Further, the curing temperature is 25-28 ℃.
Compared with the prior art, the invention has the following implementation effects:
1. the low-viscosity silicone adhesive is synthesized by adopting the low-viscosity components, can be sprayed on the surface of an electronic component to form a uniform and flat insulating layer, is simple and convenient to operate, and is beneficial to prolonging the service life of power equipment.
2. According to the invention, the silicone adhesive layer has a better heat dissipation effect by controlling the thickness of the sprayed silicone adhesive layer and adding the heat dissipation filler.
Detailed Description
The present invention will be further described with reference to the following examples, but the present invention is not limited to these examples, and any modifications within the scope of the present invention are within the scope of the present invention.
Example 1:
(1) Weighing 29.0g of white pasty component A, and slowly adding 7.75g of petroleum ether (60-90) to obtain a white solution C;
(2) Adding 0g of boron nitride into the white solution C, uniformly stirring, sealing, performing ultrasonic treatment in an ultrasonic pool for 2 hours to obtain a white suspension E, and sealing for later use;
(3) Weighing 29.0g of black paste component B, and slowly adding 7.75g of petroleum ether (60-90) to obtain a black solution C;
(4) Slowly pouring the black solution C into the white suspension E, and uniformly stirring to obtain black silicone adhesive;
(5) 2g of silicone adhesive is poured into a spray gun, evenly sprayed on a glass plate, cured at room temperature to form an insulating layer with the thickness of 258 mu m, and the surface resistivity of the insulating layer is tested;
(6) Taking 10g of silicone adhesive, preparing a dumbbell-shaped sample strip with the gauge length of 40mm, the width of 10mm and the thickness of 1mm, and curing at room temperature and then testing the tensile strength and the elongation at break of the sample strip;
(7) Taking 30g of silicone adhesive, and testing the viscosity of the silicone adhesive at a rotating speed of 30rmp by using a rotary viscometer;
(8) Coating 0.5g of silicone adhesive between two glass sheets to form a lap joint area of 5.12cm 2 The shear strength was measured on a bar having a thickness of 76 μm.
The curing time and the various property tests are shown in Table 1.
Example 2:
(1) Weighing 15.43g of white pasty component A, and slowly adding 7.05g of petroleum ether (60-90) to obtain a white solution C;
(2) Adding 0g of boron nitride into the white solution C, uniformly stirring, sealing, performing ultrasonic treatment in an ultrasonic pool for 2 hours to obtain a white suspension E, and sealing for later use;
(3) Weighing 15.14g of black paste component B15.05 g, and slowly adding 7.05g of petroleum ether (60-90) to obtain a black solution D;
(4) Slowly pouring the black solution D into the white suspension E, and uniformly stirring to obtain silicone adhesive;
(5) 2g of silicone adhesive is poured into a spray gun, evenly sprayed on a glass plate, cured at room temperature to form an insulating layer with the thickness of 243 mu m, and the surface resistivity of the insulating layer is tested;
(6) Taking 10g of silicone adhesive, preparing into a dumbbell-shaped sample strip with the gauge length of 40mm, the width of 10mm and the thickness of 1mm, and testing the tensile strength and the elongation at break of the sample strip after curing at room temperature;
(7) Taking 30g of silicone adhesive, and testing the viscosity of the silicone adhesive at a rotating speed of 30rmp by using a rotary viscometer;
(8) 0.5g of silicone adhesive was applied between two glass plates to form a strip having an overlapping area of 5.12cm2 and a thickness of 74 μm, and the shear strength was measured.
The curing time and the various property tests are shown in Table 1.
Example 3:
(1) Weighing 15.36g of white pasty component, and slowly adding 15.32g of petroleum ether (60-90) to obtain a white solution C;
(2) Adding 0g of boron nitride into the white solution C, uniformly stirring, sealing, performing ultrasonic treatment in an ultrasonic pool for 2 hours to obtain a white suspension E, and sealing for later use;
(3) Weighing 15.49g of black paste component B, and slowly adding 15.32g of petroleum ether (60-90) to obtain a black solution D;
(4) Slowly pouring the black solution D into the white suspension E, and uniformly stirring to obtain silicone adhesive;
(5) 2g of silicone adhesive is poured into a spray gun, is uniformly sprayed on a glass plate, is cured at room temperature to form an insulating layer with the thickness of 258 mu m, and is tested for surface resistivity;
(6) Taking 10g of silicone adhesive, preparing a dumbbell-shaped sample strip with the gauge length of 40mm, the width of 10mm and the thickness of 1mm, and curing at room temperature and then testing the tensile strength and the elongation at break of the sample strip;
(7) Taking 30g of silicone adhesive, and testing the viscosity of the silicone adhesive at a rotating speed of 30rmp by using a rotary viscometer;
(8) 0.5g of silicone adhesive was applied between two glass plates to form a specimen having an overlapping area of 5.12cm2 and a thickness of 77 μm, and the shear strength was measured.
The curing time and the various property tests are shown in Table 1.
Example 4:
(1) Weighing 29.0g of white pasty component A, and slowly adding 7.75g of petroleum ether (60-90) to obtain a white solution C;
(2) Adding 0g of boron nitride into the white solution C, uniformly stirring, sealing, performing ultrasonic treatment in an ultrasonic pool for 2 hours to obtain a white suspension E, and sealing for later use;
(3) Weighing 29.0g of black paste component B29, slowly adding 7.75g of petroleum ether (60-90) to obtain a black solution D;
(4) Slowly pouring the black solution D into the white suspension E, and uniformly stirring to obtain silicone adhesive;
(5) 2g of silicone adhesive is poured into a spray gun, evenly sprayed on a glass plate, cured at room temperature to form an insulating layer with the thickness of 258 mu m, and the surface resistivity of the insulating layer is tested;
(6) Taking 10g of silicone adhesive, preparing a dumbbell-shaped sample strip with the gauge length of 30mm, the width of 4mm and the thickness of 10mm, and curing at room temperature and then testing the tensile strength and the elongation at break of the sample strip;
(7) 30g of silicone gel was taken and tested for viscosity at a rotational speed of 30rmp using a rotational viscometer.
The curing times and the respective performance tests are shown in Table 2.
Example 5:
(1) Weighing 15.43g of white pasty component A15.43g, and slowly adding 7.05g of petroleum ether (60-90) to obtain a white solution C;
(2) Adding 0g of boron nitride into the white solution C, uniformly stirring, sealing, performing ultrasonic treatment in an ultrasonic pool for 2 hours to obtain a white suspension E, and sealing for later use;
(3) Weighing 15.14g of the component B15, and slowly adding 7.05g of petroleum ether (60-90) to obtain a black solution D;
(4) Slowly pouring the black solution D into the white suspension E, and uniformly stirring to obtain silicone adhesive;
(5) 2g of silicone adhesive is poured into a spray gun, evenly sprayed on a glass plate, cured at room temperature to form an insulating layer with the thickness of 243 mu m, and the surface resistivity of the insulating layer is tested;
(6) Taking 10g of the black suspension C, preparing a dumbbell-shaped sample strip with the gauge length of 30mm, the width of 4mm and the thickness of 10mm, and testing the tensile strength and the elongation at break of the sample strip after curing at room temperature;
(7) 30g of the black suspension C were tested for viscosity at a rotational speed of 30rmp using a rotational viscometer.
The curing time and various performance tests are shown in Table 2.
Example 6
(1) Weighing 29.0g of the white pasty component A, and slowly adding 7.75g of petroleum ether (60-90) to obtain a white solution C;
(2) Adding 11.6g of boron nitride into the white solution C, uniformly stirring, sealing, performing ultrasonic treatment in an ultrasonic pool for 2 hours to obtain a white suspension E, and sealing for later use;
(3) Weighing 29.0g of black paste component B, and slowly adding 7.75g of petroleum ether (60-90) to obtain black solution C;
(4) Slowly pouring the black solution C into the white suspension E, and uniformly stirring to obtain black silicone adhesive;
(5) 2g of silicone adhesive is poured into a spray gun, evenly sprayed on a glass plate, cured at room temperature to form an insulating layer with the thickness of 258 mu m, and the surface resistivity of the insulating layer is tested;
(6) Taking 10g of silicone adhesive, preparing into a dumbbell-shaped sample strip with the gauge length of 40mm, the width of 10mm and the thickness of 1mm, and testing the tensile strength and the elongation at break of the sample strip after curing at room temperature;
(7) Taking 30g of silicone adhesive, and testing the viscosity of the silicone adhesive at a rotating speed of 30rmp by using a rotary viscometer;
(8) Coating 0.5g of silicone adhesive between two glass sheets to form a lap joint area of 5.12cm 2 The shear strength was measured on a bar having a thickness of 76 μm.
The curing times and the respective performance tests are shown in Table 3.
Example 7
(1) Weighing 29.0g of white pasty component A, and slowly adding 7.75g of petroleum ether (60-90) to obtain a white solution C;
(2) Adding 23.2g of boron nitride into the white solution C, uniformly stirring, sealing, performing ultrasonic treatment in an ultrasonic pool for 2 hours to obtain a white suspension E, and sealing for later use;
(3) Weighing 29.0g of black paste component B, and slowly adding 7.75g of petroleum ether (60-90) to obtain a black solution C;
(4) Slowly pouring the black solution C into the white suspension E, and uniformly stirring to obtain black silicone adhesive;
(5) 2g of silicone adhesive is poured into a spray gun, is uniformly sprayed on a glass plate, is cured at room temperature to form an insulating layer with the thickness of 258 mu m, and is tested for surface resistivity;
(6) Taking 10g of silicone adhesive, preparing a dumbbell-shaped sample strip with the gauge length of 40mm, the width of 10mm and the thickness of 1mm, and curing at room temperature and then testing the tensile strength and the elongation at break of the sample strip;
(7) Taking 30g of silicone adhesive, and testing the viscosity of the silicone adhesive at a rotating speed of 30rmp by using a rotary viscometer;
(8) Coating 0.5g of silicone adhesive between two glass sheets to form a lap joint area of 5.12cm 2 The shear strength was measured on a bar having a thickness of 76 μm.
The curing times and the respective performance tests are shown in Table 3.
Example 8
(1) Weighing 29.0g of the white pasty component A, and slowly adding 7.75g of petroleum ether (60-90) to obtain a white solution C;
(2) Adding 23.2g of graphene into the white solution C, uniformly stirring, sealing, performing ultrasonic treatment in an ultrasonic pool for 2 hours to obtain a white suspension E, and sealing for later use;
(3) Weighing 29.0g of black paste component B, and slowly adding 7.75g of petroleum ether (60-90) to obtain black solution C;
(4) Slowly pouring the black solution C into the white suspension E, and uniformly stirring to obtain black silicone adhesive;
(5) 2g of silicone adhesive is poured into a spray gun, evenly sprayed on a glass plate, cured at room temperature to form an insulating layer with the thickness of 258 mu m, and the surface resistivity of the insulating layer is tested;
(6) Taking 10g of silicone adhesive, preparing a dumbbell-shaped sample strip with the gauge length of 40mm, the width of 10mm and the thickness of 1mm, and curing at room temperature and then testing the tensile strength and the elongation at break of the sample strip;
(7) Taking 30g of silicone adhesive, and testing the viscosity of the silicone adhesive at a rotating speed of 30rmp by using a rotary viscometer;
(8) Coating 0.5g of silicone adhesive between two glass sheets to form a lap joint area of 5.12cm 2 The shear strength was measured on a bar having a thickness of 76 μm.
The curing times and the respective performance tests are shown in Table 3.
Table 1 examples 1-3 performance testing
Table 2 examples 4-5 performance testing
Table 3 examples 6-8 performance testing
As can be seen from the results in tables 1-3, the sprayable silicone adhesive provided by the present invention has good properties, can meet the requirements of electrical resistance and strength, and has the advantages of fast surface drying time and easy operation.
The foregoing is illustrative and explanatory of the inventive concept, and it will be appreciated by those skilled in the art that various modifications, additions and substitutions can be made to the embodiments described without departing from the spirit of the invention or exceeding the scope of the invention as defined in the claims.
Claims (8)
1. A sprayable silicone adhesive for electrical devices, comprising: the composition comprises the following components in parts by weight: 50-60 parts of component A, 50-60 parts of component B, 25-30 parts of diluent and 0-40 parts of filler;
the component A is prepared by mixing 30-60 parts of polydimethylsiloxane, 20-50 parts of simethicone, 35-55 parts of nano calcium carbonate, 1-5 parts of organic bentonite and 0.01-1 part of dibutyltin dilaurate, and the viscosity of the component A is 25000-30000cps;
the component B consists of 20-50 parts of polydimethylsiloxane, 40-60 parts of nano calcium carbonate, 5-20 parts of methyltrimethoxy siloxane, 1-5 parts of organic bentonite and 3-8 parts of color paste, and the viscosity of the component B is 10000-15000cps.
2. Sprayable silicone adhesive for electrical devices according to claim 1, characterized in that: the mass ratio of the component A to the component B to the diluent is 2.
3. Sprayable silicone adhesive for electrical equipment according to claim 2, characterized in that: the diluent is selected from one or a mixture of 60-90 parts of petroleum ether with the viscosity of 60cps, 30-60 parts of petroleum ether with the viscosity of 60cps, dimethyl silicone oil with the viscosity of 100cps or vinyl silicone oil with the viscosity of 100 cps.
4. Sprayable silicone adhesive for electrical devices according to claim 1, characterized in that: the filler is selected from one of boron nitride or graphene or a mixture of the boron nitride and the graphene.
5. A method for preparing sprayable silicone adhesive for electrical devices according to any of claims 1 to 4, characterized in that: the method specifically comprises the following steps:
step one, weighing a white pasty component A, a black pasty component B, a diluent and a filler according to parts by weight;
dividing the diluent into two parts, slowly adding the diluent into the group A and the group B respectively, and uniformly stirring to obtain a white solution C and a black solution D;
step three, adding a filler into the white solution C, uniformly stirring, and then performing ultrasonic dispersion under a sealed condition to disperse the filler into the white solution C to obtain a white suspension E;
and step four, slowly adding the black solution D into the white suspension E, uniformly stirring to obtain the silicone adhesive, and sealing the silicone adhesive for later use.
6. The preparation method of the sprayable silicone adhesive for the electrical equipment according to claim 5, wherein the preparation method comprises the following steps: the time of ultrasonic dispersion in the third step is 2-4 hours.
7. The preparation method of the sprayable silicone adhesive for the electrical equipment according to claim 5, wherein the preparation method comprises the following steps: the use method of the silicone adhesive comprises the following steps: and transferring the prepared silicone adhesive into a spray can, facing the surface of the electronic component needing to be sprayed with the silicone adhesive, standing and curing for 24 hours to obtain a uniform and flat black silicone adhesive layer.
8. The preparation method of the sprayable silicone adhesive for the electric power equipment according to claim 7, characterized by comprising the following steps: the curing temperature is 25-28 ℃.
Priority Applications (1)
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| US20050054765A1 (en) * | 2001-11-21 | 2005-03-10 | Ge Bayer Silicones Gmbh & Co Kg | Polyorganosiloxane compositions which can be painted or coated over |
| CN103320086A (en) * | 2013-07-11 | 2013-09-25 | 广东恒大新材料科技有限公司 | Condensed double-component organosilicon sealant and preparation method thereof |
| CN106065314A (en) * | 2016-06-12 | 2016-11-02 | 江苏明昊新材料科技股份有限公司 | Bi-component high thermal conductive silicon ketone glue and preparation method thereof and use |
| CN110699035A (en) * | 2019-11-02 | 2020-01-17 | 福建省昌德胶业科技有限公司 | Preparation of room-temperature-vulcanized high-performance bi-component bonding sealing silicone adhesive |
| CN113943546A (en) * | 2021-10-28 | 2022-01-18 | 济南汉斯曼时代技术有限公司 | Two-component silicone pouring sealant for electrical components and preparation method thereof |
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2022
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| US20050054765A1 (en) * | 2001-11-21 | 2005-03-10 | Ge Bayer Silicones Gmbh & Co Kg | Polyorganosiloxane compositions which can be painted or coated over |
| CN103320086A (en) * | 2013-07-11 | 2013-09-25 | 广东恒大新材料科技有限公司 | Condensed double-component organosilicon sealant and preparation method thereof |
| CN106065314A (en) * | 2016-06-12 | 2016-11-02 | 江苏明昊新材料科技股份有限公司 | Bi-component high thermal conductive silicon ketone glue and preparation method thereof and use |
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| CN113943546A (en) * | 2021-10-28 | 2022-01-18 | 济南汉斯曼时代技术有限公司 | Two-component silicone pouring sealant for electrical components and preparation method thereof |
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