CN111286307A - Curable two-component heat-conducting heat-storing silicone gel - Google Patents
Curable two-component heat-conducting heat-storing silicone gel Download PDFInfo
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- CN111286307A CN111286307A CN202010151850.7A CN202010151850A CN111286307A CN 111286307 A CN111286307 A CN 111286307A CN 202010151850 A CN202010151850 A CN 202010151850A CN 111286307 A CN111286307 A CN 111286307A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/02—Materials undergoing a change of physical state when used
- C09K5/06—Materials undergoing a change of physical state when used the change of state being from liquid to solid or vice versa
- C09K5/063—Materials absorbing or liberating heat during crystallisation; Heat storage materials
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L91/00—Compositions of oils, fats or waxes; Compositions of derivatives thereof
- C08L91/06—Waxes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention relates to a curable two-component heat-conducting heat-storing silicon gel which is formed by mixing a component A and a component B according to the weight ratio of 1:1, wherein the component A comprises the following components in percentage by weight: 8-10% of vinyl silicone oil, 0.01-0.05% of catalyst and the balance of heat-conducting and heat-storing filler; the component B comprises the following components in percentage by weight: 6-8% of vinyl silicone oil, 1-2% of hydrogen-containing silicone oil, 0.01-0.02% of inhibitor and the balance of heat-conducting filler; the heat-conducting heat-storing filler comprises the following components in percentage by weight: 6-10% of expanded graphite and 90-94% of phase-change wax. The invention has higher heat conductivity coefficient, can meet the heat conduction requirement of a sensitive device, can greatly absorb the extra heat generated when the device runs at full load, achieves the effect of protecting the device, can also reduce the manual requirement, and effectively improves the production efficiency and the material utilization rate.
Description
Technical Field
The invention belongs to the technical field of heat conduction materials, and particularly relates to a curable two-component heat conduction and storage silicone gel.
Background
Along with the continuous complication of integrated circuit, the packing density of electronic integrated board increases, and the density of generating heat under the unit area increases, and functional components and parts are miniaturized, and is comparatively sensitive to the installation stress, very easily leads to components and parts to damage or the reliability to descend because of the stress is too big, therefore only possesses traditional heat conduction gel of heat conduction effect and has can't satisfy the market demand. Meanwhile, with the increase of processing cost, the heat conducting gasket which takes labor intensive type as a main operation mode cannot meet the current cost requirement, and the labor cost pressure is increased.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a curable two-component heat-conducting silicone gel composition with a heat storage effect. The high-heat-conductivity-coefficient heat-conducting material has high heat conductivity coefficient, can meet the heat-conducting requirement of a sensitive device, can greatly absorb extra heat generated when the device runs at full load, achieves the effect of protecting the device, can reduce the manual requirement, and effectively improves the production efficiency and the material utilization rate.
The invention is realized by the following technical scheme:
the curable two-component heat-conducting heat-storing silicone gel is characterized by consisting of a component A and a component B, wherein the component A and the component B are mixed according to the weight ratio of 1:1,
the component A comprises the following components in percentage by weight: 8-10% of vinyl silicone oil, 0.01-0.05% of catalyst and the balance of heat-conducting and heat-storing filler;
the component B comprises the following components in percentage by weight: 6-8% of vinyl silicone oil, 2-4% of hydrogen-containing silicone oil, 0.01-0.03% of inhibitor and the balance of heat-conducting and heat-storing filler.
The curable two-component heat-conducting heat-storing silicone gel is characterized in that the vinyl silicone oil is terminal vinyl silicone oil, the viscosity of the vinyl silicone oil is 50-100mPa & s, and the vinyl content of the vinyl silicone oil is 1-2 mol%.
The curable two-component heat-conducting heat-storing silicone gel is characterized in that the hydrogen-containing silicone oil is methyl hydrogen-containing silicone oil, and the viscosity of the silicone oil is 10-50mm2And/s, the hydrogen content is more than or equal to 0.1 percent.
The curable two-component heat-conducting and heat-storing silicone gel is characterized in that the catalyst is a platinum catalyst, and the platinum content of the catalyst is 3000-5000 ppm.
The curable two-component heat-conducting heat-storing silicon gel is characterized in that the particle size distribution of the expanded graphite is 50-80 meshes; the phase transition temperature of the phase transition wax is 60-150 ℃.
The curable two-component heat-conducting and heat-storing silicone gel is characterized in that the preparation of the heat-conducting and heat-storing filler comprises the following steps: uniformly spreading a layer of expanded graphite and a layer of phase-change wax in a glass container in a circulating mode in sequence, wherein the amount of the expanded graphite in each layer is the same, the amount of the phase-change wax in each layer is the same, placing the glass container in an oven at 120 ℃ and vacuumizing, keeping the negative pressure state of the oven for 6-8 hours, and opening and stirring once every 1-2 hours during the period to uniformly mix the expanded graphite and the phase-change wax to obtain mixed particles, so that the heat-conducting heat-storage filler is prepared.
The curable two-component heat-conducting heat-storing silicone gel is characterized in that the preparation of the component A comprises the following steps:
1) sequentially adding vinyl silicone oil and a catalyst into a double-planet stirrer, and fully stirring to uniformly mix the vinyl silicone oil and the catalyst to obtain a mixed solution;
2) adding heat-conducting heat storage filler into the mixed solution prepared in the step 1), and fully stirring for 30-50 minutes to prepare the component A.
The curable two-component heat-conducting heat-storing silicone gel is characterized in that the preparation of the component B comprises the following steps:
1) sequentially adding vinyl silicone oil, hydrogen-containing silicone oil and an inhibitor into a double-planet stirrer, fully stirring, and uniformly mixing to obtain a mixed solution;
2) adding heat-conducting heat storage filler into the mixed solution prepared in the step 1), and fully stirring for 30-50 minutes to prepare a component B.
The curable two-component heat-conducting heat-storing silicon gel provided by the invention has a high heat conductivity coefficient, can meet the high heat-conducting requirement of a sensitive device, can greatly absorb the extra heat generated when the device runs at full load, achieves the effect of protecting the device, can reduce the manual requirement, and effectively improves the production efficiency and the material utilization rate. The heat-conducting gel used in the market at present has certain reliability problem, but the curable double-component heat-conducting silicone gel composition with the heat storage effect can be cured at normal temperature after glue application and installation are finished, so that the environmental reliability of the curable double-component heat-conducting silicone gel composition is ensured.
Compared with a heat-conducting gasket, the curable two-component heat-conducting heat-storing silicone gel has the advantages that when the curable two-component heat-conducting heat-storing silicone gel is installed, the stress of materials on components is small, and the stress generated instantaneously by the outside world can be absorbed through deformation, so that the components are protected, and the components are prevented from being damaged; compared with the heat conducting paste, the mud-shaped heat conducting interface gap filling material has the advantages that the heat conducting paste is suitable for filling zero-to-zero contact gaps and cannot fill larger gaps or gaps among components, and the mud-shaped heat conducting interface gap filling material is suitable for gaps of various specifications due to excellent wettability and inherent vertical thixotropy on the surface of the component; compared with single-component heat-conducting gel, the single-component heat-conducting gel has the advantages that the problems of slippage and overflow cannot occur after the single-component heat-conducting gel is used; compared with the traditional heat-conducting gel, the heat-conducting gel has the advantages that the heat-conducting gel not only has the heat-conducting effect, but also has the heat storage effect, and the problems that the device is overheated due to full-load operation and the heat dissipation is not timely can be avoided after the heat-conducting gel is used.
The full crosslinking between the organic matrixes and the matching between the coupling agents enable the final product to have excellent reliability, and the product performance is unchanged in a long-term aging test of 1000 hours at 120 ℃, and failure results such as dry cracking, powder changing and the like do not occur.
Detailed Description
The present invention will be described in further detail with reference to specific examples.
Example 1
A curable two-component heat-conducting heat-storing silicone gel is prepared by the following steps:
taking 10g of expanded graphite and 90g of 80 ℃ phase-change wax, alternately paving 1g of expanded graphite, 10g of phase-change wax, … … 10g of expanded graphite and 1g of expanded graphite in a large glass tank, covering the opening of the glass tank with a wire gauze, putting the glass tank in a 120 ℃ oven for vacuumizing, keeping the negative pressure state for 8 hours, and taking out and stirring once every 2 hours. And after the cooling is completed, the heat-conducting heat-storage filler is obtained.
The component A comprises:
step one, adding 99.90g of vinyl-terminated silicone oil and 0.10g of platinum catalyst into a double-planet stirrer in sequence, and fully stirring to form a transparent solution;
and step two, adding 900g of heat-conducting and heat-storing filler into a double-planet stirrer in 4 batches, fully mixing with the mixed solution prepared in the step one, stirring for 5 minutes after each addition, and stirring for 10 minutes in vacuum. And filling to obtain the curable double-component heat-conducting silica gel composition component A with the heat storage effect.
And B component:
step one, 87.42g of terminal vinyl silicone oil, 12.48g of methyl hydrogen silicone oil and 0.1g of inhibitor are added into a double-planet stirrer in sequence and are fully stirred to form transparent solution;
and step two, adding 900g of heat-conducting and heat-storing filler into a double-planet stirrer in 4 batches, fully mixing with the mixed solution prepared in the step one, stirring for 5 minutes after each addition, and stirring for 10 minutes in vacuum. And filling to obtain the curable double-component heat-conducting silica gel composition component B with the heat storage effect.
Mixing A, B components in a mass ratio of 1:1 testing after mixing and curing
The test mode of this example is as follows:
(1) the thermal conductivity of the embodiment was tested by using a thermal conductivity tester model TPS 2500S from HOT DISK AB to evaluate the thermal conductivity;
(2) the examples were tested for the amount of glue dispensed using a hand held dispensing device of the type Performmus V from Nordson EFD to evaluate the efficiency of the glue application;
the test results of this example are as follows:
heat conduction and heat storage filler: latent heat: 186.8J/g
Thermal conductivity of the cured composition: 3.18W/mK; latent heat: 164.5J/g.
Example 2
A curable two-component heat-conducting heat-storing silicone gel is prepared by the following steps:
taking 7g of expanded graphite and 93g of 80 ℃ phase change wax, alternately paving 1g of expanded graphite, 15.5g of phase change wax, 1g of expanded graphite … … 15.5.5 g of phase change wax and 1g of expanded graphite in a large glass tank, covering the opening of the glass tank with a wire gauze, putting the glass tank in a 120 ℃ oven for vacuumizing, keeping the negative pressure state for 8 hours, and taking out the expanded graphite and stirring the expanded graphite once every 2 hours. And after the cooling is completed, the heat-conducting heat-storage filler is obtained.
The component A comprises: step one, adding 99.90g of vinyl-terminated silicone oil and 0.10g of platinum catalyst into a double-planet stirrer in sequence, and fully stirring to form a transparent solution;
and step two, adding 900g of heat-conducting and heat-storing filler into a double-planet stirrer in 4 batches, fully mixing with the mixed solution prepared in the step one, stirring for 5 minutes after each addition, and stirring for 10 minutes in vacuum. And filling to obtain the curable double-component heat-conducting silica gel composition component A with the heat storage effect.
And B component: step one, 87.42g of terminal vinyl silicone oil, 12.48g of methyl hydrogen silicone oil and 0.1g of inhibitor are added into a double-planet stirrer in sequence and are fully stirred to form transparent solution;
and step two, adding 900g of heat-conducting and heat-storing filler into a double-planet stirrer in 4 batches, fully mixing with the mixed solution prepared in the step one, stirring for 5 minutes after each addition, and stirring for 10 minutes in vacuum. And filling to obtain the curable double-component heat-conducting silica gel composition component B with the heat storage effect.
Mixing A, B components in a mass ratio of 1:1 testing after mixing and curing
The test mode of this example is as follows:
(1) the thermal conductivity of the embodiment was tested by using a thermal conductivity tester model TPS 2500S from HOT DISK AB to evaluate the thermal conductivity;
(2) the examples were tested for the amount of glue dispensed using a hand held dispensing device of the type Performmus V from Nordson EFD to evaluate the efficiency of the glue application;
the test results of this example are as follows:
heat conduction and heat storage filler: latent heat: 195.2J/g
Thermal conductivity of the cured composition: 3.08W/mK; latent heat: 168.5J/g.
Example 3
A curable two-component heat-conducting heat-storing silicone gel is prepared by the following steps:
taking 7g of expanded graphite and 93g of 80 ℃ phase change wax, alternately paving 1g of expanded graphite, 15.5g of phase change wax, 1g of expanded graphite … … 15.5.5 g of phase change wax and 1g of expanded graphite in a large glass tank, covering the opening of the glass tank with a wire gauze, putting the glass tank in a 120 ℃ oven for vacuumizing, keeping the negative pressure state for 8 hours, and taking out the expanded graphite and stirring the expanded graphite once every 2 hours. And after the cooling is completed, the heat-conducting heat-storage filler is obtained.
The component A comprises: step one, adding 79.90g of terminal vinyl silicone oil and 0.10g of platinum catalyst into a double-planet stirrer in sequence, and fully stirring to form a transparent solution;
and step two, adding 920g of heat-conducting and heat-storing filler into a double-planet stirrer in 4 batches, fully mixing with the mixed solution prepared in the step one, stirring for 5 minutes after each addition, and stirring for 10 minutes in vacuum. And filling to obtain the curable double-component heat-conducting silica gel composition component A with the heat storage effect.
And B component: step one, 69.92g of terminal vinyl silicone oil, 9.98g of methyl hydrogen silicone oil and 0.1g of inhibitor are added into a double-planet stirrer in sequence and are fully stirred to form transparent solution;
and step two, adding 920g of heat-conducting and heat-storing filler into a double-planet stirrer in 4 batches, fully mixing with the mixed solution prepared in the step one, stirring for 5 minutes after each addition, and stirring for 10 minutes in vacuum. And filling to obtain the curable double-component heat-conducting silica gel composition component B with the heat storage effect.
Mixing A, B components in a mass ratio of 1:1 testing after mixing and curing
The test mode of this example is as follows:
(1) the thermal conductivity of the embodiment was tested by using a thermal conductivity tester model TPS 2500S from HOT DISK AB to evaluate the thermal conductivity;
(2) the examples were tested for the amount of glue dispensed using a hand held dispensing device of the type Performmus V from Nordson EFD to evaluate the efficiency of the glue application;
the test results of this example are as follows:
heat conduction and heat storage filler: latent heat: 195.2J/g
Thermal conductivity of the cured composition: 3.32W/mK; latent heat: 178.5J/g.
Claims (8)
1. A curable two-component heat-conducting heat-storing silicone gel is characterized by consisting of a component A and a component B, wherein the component A and the component B are mixed according to the weight ratio of 1:1,
the component A comprises the following components in percentage by weight: 8-10% of vinyl silicone oil, 0.01-0.05% of catalyst and the balance of heat-conducting and heat-storing filler;
the component B comprises the following components in percentage by weight: 6-8% of vinyl silicone oil, 1-2% of hydrogen-containing silicone oil, 0.01-0.02% of inhibitor and the balance of heat-conducting and heat-storing filler;
the heat-conducting heat-storing filler comprises the following components in percentage by weight: 6-10% of expanded graphite and 90-94% of phase-change wax.
2. The curable two-component heat-conducting heat-storing silicone gel according to claim 1, wherein the vinyl silicone oil is a terminal vinyl silicone oil having a viscosity of 50 to 100 mPa-s and a vinyl content of 1 to 2 mol%.
3. The curable two-component heat-conducting heat-storing silicone gel according to claim 1, wherein the hydrogen-containing silicone oil is methyl hydrogen-containing silicone oil with a viscosity of 10-50mm2And/s, the hydrogen content is more than or equal to 0.1 percent.
4. The curable two-component heat-conducting heat-storing silicone gel as claimed in claim 1, wherein the catalyst is platinum catalyst, and the platinum content is 3000-5000 ppm.
5. The curable two-component heat-conducting heat-storing silicone gel according to claim 1, wherein the expanded graphite has a particle size distribution of 50 mesh to 80 mesh; the phase transition temperature of the phase transition wax is 60-150 ℃.
6. The curable two-component heat-conducting heat-storing silicone gel according to claim 1, wherein the preparation of the heat-conducting heat-storing filler comprises the following steps:
uniformly spreading a layer of expanded graphite and a layer of phase-change wax in a glass container in a circulating mode in sequence, wherein the amount of the expanded graphite in each layer is the same, the amount of the phase-change wax in each layer is the same, placing the glass container in an oven at 120 ℃ and vacuumizing, keeping the negative pressure state of the oven for 6-8 hours, and opening and stirring once every 1-2 hours during the period to uniformly mix the expanded graphite and the phase-change wax to obtain mixed particles, so that the heat-conducting heat-storage filler is prepared.
7. The curable two-component heat-conducting heat-storing silicone gel according to claim 1, wherein the preparation of the component A comprises the following steps:
1) sequentially adding vinyl silicone oil and a catalyst into a double-planet stirrer, and fully stirring to uniformly mix the vinyl silicone oil and the catalyst to obtain a mixed solution;
2) adding heat-conducting heat storage filler into the mixed solution prepared in the step 1), and fully stirring for 30-50 minutes to prepare the component A.
8. The curable two-component heat-conducting heat-storing silicone gel according to claim 1, wherein the preparation of the component B comprises the following steps:
1) sequentially adding vinyl silicone oil, hydrogen-containing silicone oil and an inhibitor into a double-planet stirrer, fully stirring, and uniformly mixing to obtain a mixed solution;
2) adding heat-conducting heat storage filler into the mixed solution prepared in the step 1), and fully stirring for 30-50 minutes to prepare a component B.
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| CN202010151850.7A CN111286307A (en) | 2020-03-06 | 2020-03-06 | Curable two-component heat-conducting heat-storing silicone gel |
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| CN202010151850.7A CN111286307A (en) | 2020-03-06 | 2020-03-06 | Curable two-component heat-conducting heat-storing silicone gel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115044352A (en) * | 2022-07-25 | 2022-09-13 | 深圳市中黄实业有限公司 | Phase-change energy storage material and preparation method thereof |
| CN117410627A (en) * | 2023-11-18 | 2024-01-16 | 武汉现代精工机械股份有限公司 | Solid superconducting material for lithium battery and lithium battery thermal management system |
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2020
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| CN106356588A (en) * | 2015-07-15 | 2017-01-25 | 广东万锦科技股份有限公司 | Preparation method of thermally conductive silica gel composite phase change material for battery thermal management system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115044352A (en) * | 2022-07-25 | 2022-09-13 | 深圳市中黄实业有限公司 | Phase-change energy storage material and preparation method thereof |
| CN117410627A (en) * | 2023-11-18 | 2024-01-16 | 武汉现代精工机械股份有限公司 | Solid superconducting material for lithium battery and lithium battery thermal management system |
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