CN108440971A - A kind of new-energy automobile low-gravity heat conductive silica gel gasket and preparation method thereof - Google Patents
A kind of new-energy automobile low-gravity heat conductive silica gel gasket and preparation method thereof Download PDFInfo
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- CN108440971A CN108440971A CN201810578111.9A CN201810578111A CN108440971A CN 108440971 A CN108440971 A CN 108440971A CN 201810578111 A CN201810578111 A CN 201810578111A CN 108440971 A CN108440971 A CN 108440971A
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- 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
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- 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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- 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
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/222—Magnesia, i.e. magnesium oxide
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- 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
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
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- C—CHEMISTRY; METALLURGY
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
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- C08K2003/282—Binary compounds of nitrogen with aluminium
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K2003/382—Boron-containing compounds and nitrogen
- C08K2003/385—Binary compounds of nitrogen with boron
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- 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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Abstract
The invention discloses a kind of new-energy automobile low-gravity heat conductive silica gel gasket, which includes following components：The organopolysiloxane of 100 parts by weight；The high heat conduction inorganic filler of 200 2000 parts by weight；0 50 parts of lightweight filler；0.05 0.5 parts of catalyst；Pigment, the organopolysiloxane is the composition of vinyl polysiloxane and hydrogen containing siloxane, and the high heat conduction inorganic filler includes one or more in silica, aluminium oxide, zinc oxide, magnesia, aluminium hydroxide, aluminium nitride, silicon nitride, boron nitride and silicon carbide；The grain size of the high heat conduction inorganic filler is 0.1 100 μm.The present invention can realize the low-gravity of heat conductive silica gel gasket while ensureing heat conductive silica gel gasket traditional performance, low-gravity heat conductive silica gel gasket weight is 40% the 70% of prior art typical thermal-conductive gasket under same thermal coefficient, meets the light-weighted demand of new-energy automobile.
Description
Technical field
The present invention relates to heat conductive silica gel technical field more particularly to a kind of new-energy automobile low-gravity heat conductive silica gel gaskets
And preparation method thereof.
Background technology
Heat conductive silica gel gasket is using silica gel as base material, and the various auxiliary materials such as addition metal oxide are synthesized by special process
A kind of heat-conducting interface material, be exclusively for using gap transmit heat design scheme and produce, can blind, complete
The heat of heating position and radiating part interdigit is transmitted, while the effects that also act as insulation, damping, sealing, disclosure satisfy that equipment is small-sized
Change and the design requirement of ultrathin, great craftsmanship and practicability, and thickness is applied widely, is that a kind of splendid heat conduction is filled out
Fill material.
However, since loading is larger, the density of filler is big, and existing heat conductive silica gel gasket density is larger.In recent years
Come, with the fast development of China's new-energy automobile, itself light-weighted demand, to heat conductive silica gel gasket propose lightweight,
Low-gravity demand, existing heat conductive silica gel gasket cannot be satisfied this demand.Therefore, a kind of low-gravity heat conductive silica gel gasket
The application blank of this respect can be filled up, there are good market prospects.
Currently, having there is the related technology of preparing of some heat conductive silica gel gaskets both at home and abroad.For example, Chinese patent
CN204031696U discloses a kind of heat-conducting silica gel sheet and preparation method thereof, and CN205196211U discloses a kind of heat-conducting silica gel sheet
And preparation method thereof, CN105349113A discloses a kind of heat-conducting silica gel sheet and preparation method thereof, these three patents all concentrate on
Improve heat conduction, the mechanical strength performance of heat-conducting silica gel sheet.However, making with functional stuffings such as a large amount of heat conduction and mechanical strengths
With although the functions such as heat conduction can be well realized, these heat conductive silica gels are all highdensity, with new-energy automobile
Weight increases, and limits its extensive use in new-energy automobile.
Invention content
It is an object of the invention to overcome problem above of the existing technology, a kind of new-energy automobile low-gravity is provided
Heat conductive silica gel gasket and preparation method thereof, the present invention can realize heat conduction while ensureing heat conductive silica gel gasket traditional performance
The low-gravity of silica gel pad, low-gravity heat conductive silica gel gasket weight is prior art typical thermal-conductive gasket under same thermal coefficient
40%-70%, meet the light-weighted demand of new-energy automobile.
To realize above-mentioned technical purpose and the technique effect, the invention is realized by the following technical scheme：
A kind of new-energy automobile low-gravity heat conductive silica gel gasket, the low-gravity heat conductive silica gel gasket include following components：
The organopolysiloxane of 100 parts by weight；The high heat conduction inorganic filler of 200-2000 parts by weight；0-50 parts of lightweight filler；
0.05-0.5 parts of catalyst；Pigment.
Preferably, the organopolysiloxane refers to the composition of vinyl polysiloxane and hydrogen containing siloxane.
Preferably, the organopolysiloxane refer to the dimethyl silicone polymer containing vinyl vinyl silicone oil with contain
The mixture of the containing hydrogen silicone oil of hydrogen branch siloxanes.
Preferably, the vinyl silicone oil is the polysiloxanes containing two and the above vinyl.
Preferably, the vinyl silicone oil can be selected from end-vinyl dimethyl silicone polymer, end-vinyl poly dimethyl-
Methyl vinyl silicone, end-vinyl polymethyl-benzene base-methyl vinyl silicone.
Preferably, the vinyl silicone oil viscosity is in 100-100000CPS.
Preferably, the containing hydrogen silicone oil refers to the polysiloxanes containing si-h bond.
Preferably, hydrogen content is 0.1-1.2wt% in the containing hydrogen silicone oil.
Preferably, the high heat conduction inorganic filler can be selected from silica, aluminium oxide, zinc oxide, magnesia, hydroxide
It is one or more in aluminium, aluminium nitride, silicon nitride, boron nitride and silicon carbide.
Preferably, to can be selected from silica, magnesia, aluminium hydroxide, boron nitride etc. low for the high heat conduction inorganic filler
Proportion heat filling.
Preferably, the grain size of the high heat conduction inorganic filler can be selected from 0.1-100 μm；
Preferably, the lightweight filler include hollow glass micro-ball, hollow ceramic microspheres, hollow alumina microballoon,
It is one or more in hollow aluminium nitride microballoon and hollow aluminium carbide microballoon.
Preferably, the grain size of the lightweight filler is 10-60 μm, real density 0.1-0.5g/cm3, pressure resistance
Degree is 1000-6000PSI.
Preferably, the surfactant includes in silane coupling agent, titanate coupling agent and aluminate coupling agent
It is one or more.
Preferably, the surfactant can be selected from hexamethyldisilazane, methyltrimethoxysilane, prestox ring
Tetrasiloxane, octyl trimethoxy silane, dodecyltrimethoxysilane, hexadecyl trimethoxy silane, γ-(2,3-
The third oxygen of epoxy) propyl trimethoxy silicane, gamma-methyl allyl acyloxypropyl trimethoxysilane, two oleic acid acyloxy of isopropyl
(dioctyl phosphoric acid acyloxy) titanate esters, three oleic acid acyloxy titanate esters of isopropyl, monoalkoxy unsaturated fatty acid titanate esters
In it is one or more.
Preferably, the catalyst is that can be selected from existing well known catalyst, preferably platinum and platinum compounds is urged
Agent can be selected from the compound etc. of platinum chloride, chlorination platinic acid, chlorination platinic acid and alkene.
Preferably, the pigment can be selected from cobalt blue, carbon black, iron oxide red or iron oxide yellow.
Preferably, the preparation method of the low-gravity heat conductive silica gel gasket, including mixing, calendering and vulcanization, it is described
Mixing is that each component is added according to the ratio to be uniformly mixed and vacuumize in double planetary mixer, and the calendering is to place mixture
In two roll calender, it is pressed into the specification of needs as required, the vulcanization is that the material after calendering is positioned over 130 degrees Celsius
Lower vulcanization 10-30MIN；
Preferably, the low-gravity heat conductive silica gel gasket can the armatures such as composite synthetic resin, glass-fiber-fabric, silica gel cloth
Material, with tensile strength, puncture energy, the electrical insulation properties etc. for further enhancing low-gravity heat conductive silica gel gasket；
Preferably, the synthetic resin can be aromatic polyimide, polyamide, polyester etc.；
Preferably, the reinforcement material can be compound in the single side, two-sided or placed in the middle of low-gravity heat conductive silica gel gasket.
The beneficial effects of the invention are as follows：The present invention ensure heat conductive silica gel gasket traditional performance (such as thermal coefficient, hardness,
Insulating properties, compliance, anti-flammability, resistance to ag(e)ing) while realize the low-gravity of heat conductive silica gel gasket, same thermal coefficient
Lower low-gravity heat conductive silica gel gasket weight is the 40%-70% of prior art typical thermal-conductive gasket, and it is light to meet new-energy automobile
The demand of quantization.
Above description is only the general introduction of technical solution of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, with presently preferred embodiments of the present invention and attached drawing is coordinated to be described in detail below.This hair
Bright specific implementation mode is shown in detail by following embodiment and its attached drawing.
Description of the drawings
Attached drawing described herein is used to provide further understanding of the present invention, and is constituted part of this application, this hair
Bright illustrative embodiments and their description are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 is embodiment one of the present invention proportioning figure；
Fig. 2 is embodiment two of the present invention proportioning figure；
Fig. 3 is embodiment three of the present invention proportioning figure；
Fig. 4 is example IV of the present invention proportioning figure；
Fig. 5 is comparative example one of the present invention proportioning figure；
Specific implementation mode
The invention will be further described below in conjunction with the accompanying drawings：
Shown in Fig. 5, a kind of new-energy automobile low-gravity heat conductive silica gel gasket, the low-gravity heat conductive silica gel
Gasket includes following components：The organopolysiloxane of 100 parts by weight；The high heat conduction inorganic filler of 200-2000 parts by weight；0-50
The lightweight filler of part；0.05-0.5 parts of catalyst；Pigment.
Preferably, the organopolysiloxane refers to the composition of vinyl polysiloxane and hydrogen containing siloxane.
Preferably, the organopolysiloxane refer to the dimethyl silicone polymer containing vinyl vinyl silicone oil with contain
The mixture of the containing hydrogen silicone oil of hydrogen branch siloxanes.
Preferably, the vinyl silicone oil is the polysiloxanes containing two and the above vinyl.
Preferably, the vinyl silicone oil can be selected from end-vinyl dimethyl silicone polymer, end-vinyl poly dimethyl-
Methyl vinyl silicone, end-vinyl polymethyl-benzene base-methyl vinyl silicone.
Preferably, the vinyl silicone oil viscosity is in 100-100000CPS.
Preferably, the containing hydrogen silicone oil refers to the polysiloxanes containing si-h bond.
Preferably, hydrogen content is 0.1-1.2wt% in the containing hydrogen silicone oil.
Preferably, the high heat conduction inorganic filler can be selected from silica, aluminium oxide, zinc oxide, magnesia, hydroxide
It is one or more in aluminium, aluminium nitride, silicon nitride, boron nitride and silicon carbide.
Preferably, to can be selected from silica, magnesia, aluminium hydroxide, boron nitride etc. low for the high heat conduction inorganic filler
Proportion heat filling.
Preferably, the grain size of the high heat conduction inorganic filler can be selected from 0.1-100 μm；
Preferably, the lightweight filler include hollow glass micro-ball, hollow ceramic microspheres, hollow alumina microballoon,
It is one or more in hollow aluminium nitride microballoon and hollow aluminium carbide microballoon.
Preferably, the grain size of the lightweight filler is 10-60 μm, real density 0.1-0.5g/cm3, pressure resistance
Degree is 1000-6000PSI.
Preferably, the surfactant includes in silane coupling agent, titanate coupling agent and aluminate coupling agent
It is one or more.
Preferably, the surfactant can be selected from hexamethyldisilazane, methyltrimethoxysilane, prestox ring
Tetrasiloxane, octyl trimethoxy silane, dodecyltrimethoxysilane, hexadecyl trimethoxy silane, γ-(2,3-
The third oxygen of epoxy) propyl trimethoxy silicane, gamma-methyl allyl acyloxypropyl trimethoxysilane, two oleic acid acyloxy of isopropyl
(dioctyl phosphoric acid acyloxy) titanate esters, three oleic acid acyloxy titanate esters of isopropyl, monoalkoxy unsaturated fatty acid titanate esters
In it is one or more.
Preferably, the catalyst is that can be selected from existing well known catalyst, preferably platinum and platinum compounds is urged
Agent can be selected from the compound etc. of platinum chloride, chlorination platinic acid, chlorination platinic acid and alkene.
Preferably, the pigment can be selected from cobalt blue, carbon black, iron oxide red or iron oxide yellow.
Preferably, the preparation method of the low-gravity heat conductive silica gel gasket, including mixing, calendering and vulcanization, it is described
Mixing is that each component is added according to the ratio to be uniformly mixed and vacuumize in double planetary mixer, and the calendering is to place mixture
In two roll calender, it is pressed into the specification of needs as required, the vulcanization is that the material after calendering is positioned over 130 degrees Celsius
Lower vulcanization 10-30MIN；
Preferably, the low-gravity heat conductive silica gel gasket can the armatures such as composite synthetic resin, glass-fiber-fabric, silica gel cloth
Material, with tensile strength, puncture energy, the electrical insulation properties etc. for further enhancing low-gravity heat conductive silica gel gasket；
Preferably, the synthetic resin can be aromatic polyimide, polyamide, polyester etc.；
Preferably, the reinforcement material can be compound in the single side, two-sided or placed in the middle of low-gravity heat conductive silica gel gasket.
Specific embodiment：
Embodiment 1：
1) vinyl silicone oil 95.375g, containing hydrogen silicone oil 4.625g, fine silica powder 100g, γ-methacryl are weighed
Oxygen propyl trimethoxy silicane 1.25g, catalyst made from platonic 0.3g；
2) by vinyl silicone oil, containing hydrogen silicone oil, fine silica powder, gamma-methyl allyl acyloxypropyl trimethoxysilane
It is placed in double planetary mixer, 40RPM stirs 180MIN under ＜ -0.9MPA vacuum degrees, it is ensured that all materials are uniformly mixed；
3) catalyst made from platonic is added, all materials 40RPM under ＜ -0.9MPA vacuum degrees stirs 30MIN；
4) material mixed is placed in two roll calender, is pressed into 2MM slab-likes；
5) product suppressed is placed under 130 degree and is molded 30MIN, obtain test article.
Embodiment 2：
1) vinyl silicone oil 95.375g, containing hydrogen silicone oil 4.625g, aluminium hydroxide micro powder 375g, boron nitride micro mist are weighed
75g, methyltrimethoxysilane 5.25g, catalyst made from platonic 0.3g；
2) by vinyl silicone oil, containing hydrogen silicone oil, aluminium hydroxide micro powder, boron nitride micro mist, methyltrimethoxysilane is placed in
In double planetary mixer, 40RPM stirs 180MIN under ＜ -0.9MPA vacuum degrees, it is ensured that all materials are uniformly mixed；
3) catalyst made from platonic is added, all materials 40RPM under ＜ -0.9MPA vacuum degrees stirs 30MIN；
4) material mixed is placed in two roll calender, is pressed into 2MM slab-likes；
5) product suppressed is placed under 130 degree and is molded 30MIN, obtain test article.
Embodiment 3：
1) vinyl silicone oil 95.625g, containing hydrogen silicone oil 4.375g, aluminium hydroxide micro powder 375g, boron nitride micro mist are weighed
65g, alumina powder 165g, dodecyltrimethoxysilane 6.05g, catalyst made from platonic 0.3g；
2) by vinyl silicone oil, containing hydrogen silicone oil, aluminium hydroxide micro powder, boron nitride micro mist, alumina powder, dodecyl three
Methoxy silane is placed in double planetary mixer, and 40RPM stirs 180MIN under ＜ -0.9MPA vacuum degrees, it is ensured that all materials
It is uniformly mixed；
3) catalyst made from platonic is added, all materials 40RPM under ＜ -0.9MPA vacuum degrees stirs 30MIN；
4) material mixed is placed in two roll calender, is pressed into 2MM slab-likes；
5) product suppressed is placed under 130 degree and is molded 30MIN, obtain test article.
Embodiment 4:
1) vinyl silicone oil 95.625g, containing hydrogen silicone oil 4.375g, aluminium hydroxide micro powder 375g, hollow glass microballoon are weighed
37.5g, dodecyltrimethoxysilane 0.95g, catalyst made from platonic 0.3g；
2) by vinyl silicone oil, containing hydrogen silicone oil, aluminium hydroxide micro powder, hollow glass microballoon, dodecyl trimethoxy silicon
Alkane is placed in double planetary mixer, and 40RPM stirs 180MIN under ＜ -0.9MPA vacuum degrees, it is ensured that all materials are uniformly mixed；
3) catalyst made from platonic is added, all materials 40RPM under ＜ -0.9MPA vacuum degrees stirs 30MIN；
4) material mixed is placed in two roll calender, is pressed into 2MM slab-likes；
5) product suppressed is placed under 130 degree and is molded 30MIN, obtain test article.
Comparative example 1：
1) vinyl silicone oil 93.1g, containing hydrogen silicone oil 6.7g, alumina powder 400g, methyltrimethoxysilane are weighed
0.95g, catalyst made from platonic 0.3g；
2) by vinyl silicone oil, containing hydrogen silicone oil, alumina powder, methyltrimethoxysilane is placed in double planetary mixer
In, 40RPM stirs 180MIN under ＜ -0.9MPA vacuum degrees, it is ensured that all materials are uniformly mixed；
3) catalyst made from platonic is added, all materials 40RPM under ＜ -0.9MPA vacuum degrees stirs 30MIN；
4) material mixed is placed in two roll calender, is pressed into 2MM slab-likes；
5) product suppressed is placed under 130 degree and is molded 30MIN, obtain test article.
Test data：
It is compared by data above, the present invention can realize the low-gravity of heat conductive silica gel gasket under same thermal coefficient.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any to be familiar with this skill
The technical staff in art field in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all cover in this hair
Within bright protection domain.Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (8)
1. a kind of new-energy automobile low-gravity heat conductive silica gel gasket, it is characterised in that：The low-gravity heat conductive silica gel gasket includes
Following components：
The organopolysiloxane of 100 parts by weight；
The high heat conduction inorganic filler of 200-2000 parts by weight；
0-50 parts of lightweight filler；
0.05-0.5 parts of catalyst；
Pigment.
2. a kind of new-energy automobile according to claim 1 low-gravity heat conductive silica gel gasket, it is characterised in that：It is described to have
Machine polysiloxanes is the composition of vinyl polysiloxane and hydrogen containing siloxane.
3. a kind of new-energy automobile according to claim 1 low-gravity heat conductive silica gel gasket, it is characterised in that：The height
Heat conduction inorganic filler include silica, aluminium oxide, zinc oxide, magnesia, aluminium hydroxide, aluminium nitride, silicon nitride, boron nitride and
It is one or more in silicon carbide；The grain size of the high heat conduction inorganic filler is 0.1-100 μm.
4. a kind of new-energy automobile according to claim 1 low-gravity heat conductive silica gel gasket, it is characterised in that：It is described light
It includes hollow glass micro-ball, hollow ceramic microspheres, hollow alumina microballoon, hollow aluminium nitride microballoon and hollow carbonization to quantify filler
It is one or more in aluminium microballoon.
5. a kind of new-energy automobile according to claim 1 low-gravity heat conductive silica gel gasket, it is characterised in that：The table
Face activating agent includes one or more in silane coupling agent, titanate coupling agent and aluminate coupling agent.
6. a kind of new-energy automobile according to claim 1 low-gravity heat conductive silica gel gasket, it is characterised in that：It is described to urge
Agent is set as platinum complex.
7. a kind of new-energy automobile according to claim 1 low-gravity heat conductive silica gel gasket, it is characterised in that：The face
Material includes cobalt blue, carbon black, iron oxide red or iron oxide yellow.
8. a kind of preparation method of low-gravity heat conductive silica gel gasket, which is characterized in that include the following steps：
1) it mixes, each component is added according to the ratio and is uniformly mixed and vacuumizes in double planetary mixer；
2) roll, mixture is positioned in two roll calender, is pressed into the specification of needs as required；
3) vulcanize, the material after calendering is positioned under 130 degrees Celsius and vulcanizes 10-30MIN, to obtain test article.
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| CN109627783A (en) * | 2019-01-04 | 2019-04-16 | 东莞市汉华热能科技有限公司 | A kind of heat conductive silica gel of Specific gravity and preparation method thereof |
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| CN110343391A (en) * | 2019-08-15 | 2019-10-18 | 昆山九聚新材料技术有限公司 | The silica gel pad and preparation method thereof of low-density high thermal conductivity |
| WO2020039761A1 (en) * | 2018-08-23 | 2020-02-27 | 信越化学工業株式会社 | Thermally-conductive silicone composition and thermally-conductive silicone cured product |
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| CN112745611A (en) * | 2020-12-24 | 2021-05-04 | 辛格顿(常州)新材料科技有限公司 | Low-density heat-conducting buffer material for new energy automobile and preparation method thereof |
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Application publication date: 20180824 |