CN109553984A - A kind of heat-conducting pad of low-density and high-strength and preparation method thereof - Google Patents
A kind of heat-conducting pad of low-density and high-strength and preparation method thereof Download PDFInfo
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- CN109553984A CN109553984A CN201811515263.0A CN201811515263A CN109553984A CN 109553984 A CN109553984 A CN 109553984A CN 201811515263 A CN201811515263 A CN 201811515263A CN 109553984 A CN109553984 A CN 109553984A
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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
- C08L83/00—Compositions of 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; Compositions of derivatives of such polymers
- C08L83/04—Polysiloxanes
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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
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/14—Solid materials, e.g. powdery or granular
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- 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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- 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
- C08K2201/00—Specific properties of additives
- C08K2201/002—Physical properties
- C08K2201/003—Additives being defined by their diameter
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- 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
- C08K2201/00—Specific properties of additives
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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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
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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Abstract
The present invention relates to a kind of low-density and high-strength heat-conducting pads and preparation method thereof, by weight, including following component: 100 parts of methyl-silicone oil, 10~20 parts of low viscosity vinyl silicone oil, 10~20 parts of high viscosity vinyl silicone oil, 5~10 parts of containing hydrogen silicone oil, 2~5 parts of platinum catalyst, 3~8 parts of coupling agent, 600~800 parts of oleic acid modified aluminium hydroxide, 60~90 parts of aluminium oxide, 5~10 parts of rilanit special；The present invention, which is used, carries out the modified aluminium hydroxide in surface through oleic acid, it is largely used to heat filling through oleic acid surface is modified, under the action of coupling agent, system cured strength is higher, the thermal coefficient of heat-conducting pad is up to 2.0w/mk, density 1.98g/cm3, tensile break strength reach 0.3MPa, can be used for new-energy automobile field.
Description
Technical field
The present invention relates to a kind of heat-conducting pad and preparation method thereof more particularly to a kind of heat-conducting pads of low-density and high-strength
And preparation method thereof, belong to field of new energy technologies.
Background technique
In recent years, due to pollution-free, noise is low, energy efficiency is high, diversified, structure is simple, easy to maintenance etc. excellent
Point, the new-energy automobiles such as electric car will become the new trend of future automobile industry development.In particular, China's electric car passes through
The course of ten Nian Yijian tentatively enters the stage of industrialization from the stage of research and development.Wherein, the thermally conductive of battery is new energy
Key difficulties and important key technology in the automobile application of source.It is well known that mitigating the weight of automobile itself can effectively drop
The raising of automobile burning efficiency is realized in low motor vehicle emission.The self weight of automobile is every to reduce 10%, and the consumption of fuel oil can reduce by 6%~
8%.
As it can be seen that automobile loss of weight can reduce energy consumption, improve speed, improve safety and reduce pollution, and in new-energy automobile
The weight of battery pack occupies significant proportion in automobiles, therefore the light-weight design of battery pack is also one, Future New Energy Source field
Important development direction.
The heat generated after battery pack fever in new-energy automobile is exported through heat-conducting pad, therefore it is required that used lead
The density of heat pad piece reaches 2.0g/cm3Hereinafter, and mechanical property cannot have a significantly sacrificing, but with a large amount of thermally conductive and mechanics
Use of the functional stuffings such as intensity in heat-conducting pad, although the fire-retardant and shock-absorbing function of automobile batteries can be well realized,
But these heat conductive silica gels are all highdensity, and then the battery weight of electric car is caused to be significantly increased, and limit it in electricity
Extensive use in electrical automobile.
Based on above-mentioned status, new-energy automobile field urgently develops that a kind of good heat conductivity, mechanical strength be high and density
2.0g/cm can be reached3Heat-conducting pad below.
Summary of the invention
The high status of heat-conducting pad density used in battery pack of the present invention for new-energy automobile provides a kind of low close
Spend high-intensitive heat-conducting pad and preparation method thereof.
The technical scheme to solve the above technical problems is that
A kind of heat-conducting pad of low-density and high-strength, by weight, including following component:
It is 100 parts of methyl-silicone oil, 10~20 parts of low viscosity vinyl silicone oil, 10~20 parts of high viscosity vinyl silicone oil, hydrogeneous
5~10 parts of silicone oil, 2~5 parts of platinum catalyst, 3~8 parts of coupling agent, 600~800 parts of oleic acid modified aluminium hydroxide, aluminium oxide 60~
90 parts, 5~10 parts of rilanit special；
The viscosity of the low viscosity vinyl silicone oil is 100~1000mPa ˙ s, and contents of ethylene is 0.05~0.3wt%；
The viscosity of the high viscosity vinyl silicone oil be 50000~100000mPa ˙ s, contents of ethylene be 0.10~
0.15wt%；
The oleic acid modified aluminium hydroxide the preparation method is as follows:
1000 parts of aluminium hydroxides are added in stirred tank, are stirred under the speed of 15~20rpm, after oleic acid is atomized after
From stirred tank top spray into stirred tank, spray rate is controlled in 0.10~0.13 part/min, 30~40min of spray time,
Then 50~60 DEG C are warming up to, keeps the temperature 1.5~2 hours, is cooled to room temperature discharging, gained powder is the modified hydroxide of oleic acid
Aluminium.
Further, the containing hydrogen silicone oil refers to that active hydrogen content is that Methyl Hydrogen Polysiloxane Fluid, the phenyl of 0.2~0.5wt% contains
The mixture of one or more of hydrogen silicone oil, hydroxyl hydrogen silicone oil.
Further, the coupling agent is silane coupling agent, preferably γ-(methacryloxypropyl) propyl trimethoxy silicane.
Further, the viscosity of the methyl-silicone oil is 450~650mPa ˙ s.
Further, the partial size of the aluminium hydroxide is 10~25 μm.
Further, the partial size of the aluminium oxide is 8~15 μm.
Further, the fusing point of the rilanit special is 85~88 DEG C.
The product design thinking of heat-conducting pad of the present invention are as follows:
In the design of thermally conductive product, the generally preferred aluminium oxide of heat filling, because the cost performance of aluminium oxide is high, thermal conductivity
High and product mechanical strength is high, but the disadvantage is that density is big；The good flame retardation effect of aluminium hydroxide, the disadvantage is that thermal conductivity and product capability
It is low to learn intensity, but density is smaller.According to calculating, if product density reaches 2.0g/cm3If, it is desirable that the content of aluminium oxide is wanted
Lower than 35%, and the content of aluminium hydroxide will reach 70% or more, if it is such proportion, then the heating conduction of product and
Mechanical property does not reach requirement again.The present invention, which is used, carries out the modified aluminium hydroxide in surface through oleic acid, through oleic acid surface
Modified to be largely used to heat filling, under the action of coupling agent, system cured strength is higher, the thermally conductive system of heat-conducting pad
Number is up to 2.0w/mk, density 1.98g/cm3, tensile break strength reach 0.3MPa, can be used for new-energy automobile field.
The beneficial effects of the present invention are:
The modified aluminium hydroxide in surface is carried out through oleic acid and improves the thermal conductivity of aluminium hydroxide, while there is aluminium hydroxide
The small advantage of density, the aluminium hydroxide for largely using oleic acid modified cooperate a small amount of aluminium oxide that can have simultaneously as heat filling
Excellent thermal conductivity and low-density, mechanical strength is high after separately solidifying under the action of coupling agent, is applicable to new-energy automobile neck
Domain.
Above-mentioned low-density and high-strength heat-conducting pad the preparation method is as follows:
By methyl-silicone oil, low viscosity vinyl silicone oil, high viscosity vinyl silicone oil, containing hydrogen silicone oil, catalyst and coupling agent
Be added in stirred tank, in revolving speed be 50~70rpm under stir evenly, after oleic acid modified aluminium hydroxide is added thereto, in turn
Speed is to stir evenly under 20~50rpm；Then aluminium oxide is added thereto, is to be stirred evenly under 50~70rpm in revolving speed, then
After rilanit special is heated to 90 DEG C, being added in stirred tank while hot in revolving speed is to stir evenly to obtain paste under 50~70rpm
Object, finally gained paste is rolled into after 2mm thickness solidify at 125 DEG C 0.5 hour it is thermally conductive up to the low-density and high-strength
Gasket.
Specific embodiment
Principles and features of the present invention are described below in conjunction with example, the given examples are served only to explain the present invention, and
It is non-to be used to limit the scope of the invention.
In Examples 1 to 5 oleic acid modified aluminium hydroxide the preparation method comprises the following steps:
1000g aluminium hydroxide is added to stirred tank, 15~20rpm of mixing speed, after oleic acid is atomized from stirred tank
Portion is sprayed into stirred tank, then spray rate control increases temperature in 0.10~0.13g/min, 30~40min of spray time
To 50~60 DEG C, 1.5~2 hours are kept the temperature, is cooled to room temperature discharging.Gained powder is oleic acid modified aluminium hydroxide.
Embodiment 1:
A kind of low-density and high-strength heat-conducting pad, by weight, including following component:
Viscosity is the methyl-silicone oil 100g of 450mPa ˙ s, viscosity is end second that 200mPa ˙ s contents of ethylene is 0.2wt%
Alkenyl silicone oil 10g, viscosity be 50000mPa ˙ s contents of ethylene be 0.3wt% vinyl silicone oil 10g, active hydrogen content be
Methyl Hydrogen Polysiloxane Fluid 5g, platinum catalyst 2g, the coupling agent γ-glycidyl ether oxygen propyl trimethoxy silicane KH- of 0.3wt%
5603g, oleic acid modified aluminium hydroxide 600g, the aluminium oxide 60g that partial size is 8~15 μm, the hydrogenated castor that fusing point is 85~88 DEG C
Oily 5g.
Embodiment 2:
A kind of low-density and high-strength heat-conducting pad, by weight, including following component:
Viscosity is the methyl-silicone oil 100g of 550mPa ˙ s, viscosity is end second that 100mPa ˙ s contents of ethylene is 0.3wt%
Alkenyl silicone oil 20g, viscosity be 100000mPa ˙ s contents of ethylene be 0.1wt% vinyl silicone oil 15g, active hydrogen content be
Hydroxyl hydrogen silicone oil 8g, platinum catalyst 5g, the coupling agent methacryloxy functional groups silane KH-570 5g, oil of 0.5wt%
Sour modified aluminium hydroxide 700g, the aluminium oxide 75g that partial size is 15~30 μm, the rilanit special 7g that fusing point is 85~88 DEG C.
Embodiment 3:
A kind of low-density and high-strength heat-conducting pad, by weight, including following component:
Viscosity is the methyl-silicone oil 100g of 650mPa ˙ s, viscosity is end second that 500mPa ˙ s contents of ethylene is 0.1wt%
Alkenyl silicone oil 15g, viscosity be 70000mPa ˙ s contents of ethylene be 0.2wt% vinyl silicone oil 10g, active hydrogen content be
Phenyl hydrogen-containing silicon oil 5g, platinum catalyst 3g, the coupling agent 3-aminopropyltriethoxysilane KH-5508g, oleic acid of 0.2wt%
Aluminium oxide 90g, the rilanit special 5g that fusing point is 83~85 DEG C that modified aluminium hydroxide 800g, partial size are 8~15 μm；
Embodiment 4:
A kind of low-density and high-strength heat-conducting pad, by weight, including following component:
Viscosity is the methyl-silicone oil 100g of 1000mPa ˙ s, viscosity is end that 1000mPa ˙ s contents of ethylene is 0.05wt%
Vinyl silicone oil 15g, viscosity be 60000mPa ˙ s contents of ethylene be 0.15wt% vinyl silicone oil 20g, active hydrogen content
3 parts of Methyl Hydrogen Polysiloxane Fluid 10g, platinum catalyst, coupling agent methyl triacetoxysilane NQ18015g, oleic acid for 0.1wt%
Aluminium oxide 85g, the rilanit special 10g that fusing point is 85~88 DEG C that modified aluminium hydroxide 600g, partial size are 30~50 μm.
Embodiment 5:
A kind of low-density and high-strength heat-conducting pad, by weight, including following component:
Viscosity is the methyl-silicone oil 100g of 800mPa ˙ s, viscosity is end second that 800mPa ˙ s contents of ethylene is 0.1wt%
Alkenyl silicone oil 20g, viscosity be 80000mPa ˙ s contents of ethylene be 0.3wt% vinyl silicone oil 10g, active hydrogen content be
Methyl Hydrogen Polysiloxane Fluid 6g, platinum catalyst 4g, the coupling agent 3- fluoropropyl methyldiethoxysilane NQ545g, oleic acid of 1.0wt%
Aluminium oxide 65g, the rilanit special 8g that fusing point is 85~88 DEG C that modified aluminium hydroxide 700g, partial size are 8~15 μm.
The heat-conducting pad of Examples 1 to 5 the preparation method is as follows:
By methyl-silicone oil, low viscosity vinyl silicone oil, high viscosity vinyl silicone oil, containing hydrogen silicone oil, catalyst and coupling agent
Be added in stirred tank, in revolving speed be 50~70rpm under stir evenly, after oleic acid modified aluminium hydroxide is added thereto, in turn
Speed is to stir evenly under 20~50rpm；Then aluminium oxide is added thereto, is to be stirred evenly under 50~70rpm in revolving speed, then
After rilanit special is heated to 90 DEG C, being added in stirred tank while hot in revolving speed is to stir evenly to obtain paste under 50~70rpm
Object, finally gained paste is rolled into after 2mm thickness solidify at 125 DEG C 0.5 hour it is thermally conductive up to the low-density and high-strength
Gasket.
Heat-conducting pad obtained by Examples 1 to 5 has carried out the test of thermal conductivity, mechanical strength and density, thermal conductivity according to
ASTM D5470 test, mechanical strength are tested according to ASTM D412, and density is tested according to helium real density method.
Specific test result is as shown in table 1:
The test result of heat-conducting pad obtained by 1 Examples 1 to 5 of table
It can be seen from the data in table 1 using the resulting heat-conducting pad density of inventive formulation be 1.96~1.98g/
cm3, tensile strength be 0.30~0.33MPa, thermal coefficient in 2.0w/mk or more, while be provided with low-density, high intensity and
Excellent thermal conductivity is applicable to new-energy automobile field.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of low-density and high-strength heat-conducting pad, which is characterized in that by weight, including following component: methyl-silicone oil 100
Part, 10~20 parts of low viscosity vinyl silicone oil, 10~20 parts of high viscosity vinyl silicone oil, 5~10 parts of containing hydrogen silicone oil, platinum catalyst
2~5 parts, 3~8 parts of coupling agent, 600~800 parts of oleic acid modified aluminium hydroxide, 60~90 parts of aluminium oxide, rilanit special 5~10
Part；
The viscosity of the low viscosity vinyl silicone oil is 100~1000mPa ˙ s, and contents of ethylene is 0.05~0.3wt%；
The viscosity of the high viscosity vinyl silicone oil be 50000~100000mPa ˙ s, contents of ethylene be 0.10~
0.15wt%；
The oleic acid modified aluminium hydroxide the preparation method is as follows:
1000 parts of aluminium hydroxides are added in stirred tank, are stirred under the speed of 15~20rpm, after oleic acid is atomized after from stirring
Kettle top spray is mixed into stirred tank, in 0.10~0.13 part/min, 30~40min of spray time, then spray rate controls
50~60 DEG C are warming up to, keeps the temperature 1.5~2 hours, is cooled to room temperature discharging, gained powder is oleic acid modified aluminium hydroxide.
2. heat-conducting pad according to claim 1, which is characterized in that the active hydrogen content of the containing hydrogen silicone oil be 0.2~
0.5wt%.
3. heat-conducting pad according to claim 2, which is characterized in that the containing hydrogen silicone oil is Methyl Hydrogen Polysiloxane Fluid, phenyl
The mixture of one or more of containing hydrogen silicone oil, hydroxyl hydrogen silicone oil.
4. heat-conducting pad according to claim 1 or 2, which is characterized in that the coupling agent is silane coupling agent.
5. heat-conducting pad according to claim 4, which is characterized in that the coupling agent is γ-(methacryloxypropyl) third
Base trimethoxy silane.
6. heat-conducting pad according to claim 4, which is characterized in that the viscosity of the methyl-silicone oil is 450~650mPa ˙
s。
7. heat-conducting pad according to claim 4, which is characterized in that the partial size of the aluminium hydroxide is 10~25 μm.
8. heat-conducting pad according to claim 4, which is characterized in that the partial size of the aluminium oxide is 8~15 μm.
9. heat-conducting pad according to claim 4, which is characterized in that the fusing point of the rilanit special is 85~88 DEG C.
10. the preparation method of heat-conducting pad according to any one of claims 1 to 9, which comprises the steps of:
Methyl-silicone oil, low viscosity vinyl silicone oil, high viscosity vinyl silicone oil, containing hydrogen silicone oil, catalyst and coupling agent are added to and are stirred
Mix in kettle, in revolving speed be 50~70rpm under stir evenly, after oleic acid modified aluminium hydroxide is added thereto, in revolving speed be 20~
It is stirred evenly under 50rpm；Then aluminium oxide is added thereto, is to be stirred evenly under 50~70rpm in revolving speed, then will hydrogenate castor
After sesame oil is heated to 90 DEG C, being added in stirred tank while hot in revolving speed is to stir evenly to obtain paste under 50~70rpm, finally will
Gained paste is rolled into after 2mm thickness in 125 DEG C of solidifications to get the low-density and high-strength heat-conducting pad.
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| CN201811515263.0A CN109553984A (en) | 2018-12-12 | 2018-12-12 | A kind of heat-conducting pad of low-density and high-strength and preparation method thereof |
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| CN201811515263.0A CN109553984A (en) | 2018-12-12 | 2018-12-12 | A kind of heat-conducting pad of low-density and high-strength and preparation method thereof |
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Cited By (7)
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| CN110172250A (en) * | 2019-05-22 | 2019-08-27 | 平湖阿莱德实业有限公司 | A kind of new-energy automobile extremely-low density high thermal conductivity calking boundary material and preparation method thereof |
| CN110951258A (en) * | 2019-12-27 | 2020-04-03 | 福建安达福新材料科技有限公司 | non-Newtonian fluid material for shoe material and preparation method thereof |
| CN110982278A (en) * | 2019-12-24 | 2020-04-10 | 深圳德邦界面材料有限公司 | Low-volatilization heat-conducting gasket and preparation method thereof |
| CN111909520A (en) * | 2020-08-14 | 2020-11-10 | 碳元科技股份有限公司 | Low-density directional high-thermal-conductivity gasket and preparation method thereof |
| CN112778768A (en) * | 2020-12-31 | 2021-05-11 | 广东皓明有机硅材料有限公司 | Low-density high-heat-conductivity silicone gel and preparation method and application thereof |
| CN114350157A (en) * | 2022-01-25 | 2022-04-15 | 上海慧尔精新材料科技有限公司 | High-strength low-oil-yielding heat-conducting silica gel gasket and preparation method thereof |
| CN114605835A (en) * | 2022-03-08 | 2022-06-10 | 苏州佰旻电子材料科技有限公司 | Low-density heat conduction gasket |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110172250A (en) * | 2019-05-22 | 2019-08-27 | 平湖阿莱德实业有限公司 | A kind of new-energy automobile extremely-low density high thermal conductivity calking boundary material and preparation method thereof |
| CN110982278A (en) * | 2019-12-24 | 2020-04-10 | 深圳德邦界面材料有限公司 | Low-volatilization heat-conducting gasket and preparation method thereof |
| CN110951258A (en) * | 2019-12-27 | 2020-04-03 | 福建安达福新材料科技有限公司 | non-Newtonian fluid material for shoe material and preparation method thereof |
| CN111909520A (en) * | 2020-08-14 | 2020-11-10 | 碳元科技股份有限公司 | Low-density directional high-thermal-conductivity gasket and preparation method thereof |
| CN112778768A (en) * | 2020-12-31 | 2021-05-11 | 广东皓明有机硅材料有限公司 | Low-density high-heat-conductivity silicone gel and preparation method and application thereof |
| CN114350157A (en) * | 2022-01-25 | 2022-04-15 | 上海慧尔精新材料科技有限公司 | High-strength low-oil-yielding heat-conducting silica gel gasket and preparation method thereof |
| CN114605835A (en) * | 2022-03-08 | 2022-06-10 | 苏州佰旻电子材料科技有限公司 | Low-density heat conduction gasket |
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