CN104530713A - Heat-conducting silicone grease - Google Patents
Heat-conducting silicone grease Download PDFInfo
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- CN104530713A CN104530713A CN201410774216.3A CN201410774216A CN104530713A CN 104530713 A CN104530713 A CN 104530713A CN 201410774216 A CN201410774216 A CN 201410774216A CN 104530713 A CN104530713 A CN 104530713A
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Abstract
The invention discloses heat-conducting silicone grease which is prepared from the following raw materials in parts by weight: 67 parts of methyl ethoxy silicone oil, 16 parts of fibrous carbon nano-tubes, 25 parts of aluminum oxide, 12 parts of scrap rubber nano-powder, 0.2 part of silane-based quaternary ammonium salt phase transfer catalysts, 3.5 parts of organic silicone oil, 8 parts of silane coupling agents and 0.8 part of antioxidants 1076. According to the heat-conducting silicone grease, the heat-conducting property of a product is enhanced by compounding the fibrous carbon nano-tubes, the aluminum oxide and the scrap rubber nano-powder as heat-conducting insulating fillers, the scrap rubber nano-powder can be used for enhancing the flowability of the product in a preparation process and filling a gap to obtain larger heat-transfer specific surface area, so that a final heat-conducting silicone grease product has the advantages of excellent heat conductivity, electrical insulation, weather resistance, hydrophobicity, physiological inertia and less surface tension, lower viscosity-temperature coefficient, higher compression resistance and no corrosion effect and can be used as a gas filling medium between an electronic element and a radiating fin.
Description
Technical field
The present invention relates to a kind of boundary material, specifically a kind of heat-conducting silicone grease, belong to macromolecule interfacial field of material technology.
Background technology
Heat-conducting silicone grease is commonly called as thermal grease, heat-conducting silicone grease is main raw material mainly with organic silicone, add material that is heat-resisting, excellent thermal conductivity, the heat-conducting type organosilicon smectic mixture made, for heat conduction and the heat radiation of the electronic components such as power amplifier, transistor, electron tube, CPU, thus ensure the stable of the electric property of electronic instrument and meter etc.Due to silicone grease composition often than scatterer also close to thermal source, the quality of its resistance toheat directly determines system lifetim and reliability.Therefore, heat-conducting silicone grease should have excellent electrical insulating property, has again excellent thermal conductivity.In the raw materials of heat-conducting silicone grease, the easy machine-shaping of general thermally conductive material, cheap, but thermal conductivity is lower.Some fillers are as aluminum oxide (ball-type, aspherical), cheap, apply more ripe, but thermal conductivity is on the low side, and aluminum nitride powder (AlNF series, ball-type, non-sphere): thermal conductivity is high, thermal expansivity is low, and dielectric loss is little, high insulation, environment-protecting asepsis, be applicable to doing high end materials, but for the universal product, its raw materials cost price is higher.
CN201010613723.0 discloses a kind of heat conductive silicone grease composition, comprise: (A) 100.0 heat conductive filler of weight part, (B) the active solid silicone resin of 0.1 ~ 8.0 weight part, (C) the active silicone oil of 0.1 ~ 15.0 weight part, (D) the polyphosphazene polymer siloxanes of 0.1 ~ 9.0 weight part, (E) nm-class catalyst of 0.1 ~ 3.0 weight part, (F) additive of 0.1 ~ 3.0 weight part, mainly solves the efflorescence along with duration of service in prior art, technical barrier that cracked and heat conductivility is deteriorated, CN201210254340.8 discloses a kind of heat conductive silicone grease composition for LED illumination lamp and preparation method thereof, described heat conductive silicone grease composition, be composited by following component by weight: methyl phenyl vinyl silicone rubber 30-40 part, dimethyl silicone oil 10-20 part, heat conductive filler 60-70 part, dicumyl peroxide 3-5 part and coupling agent, the consumption of described coupling agent is the 0.5-2% of heat conductive filler weight, described heat conductive filler is silicon carbide, the mixture of nickel powder and boron nitride, described coupling agent is made up of by weight following component: sec.-propyl distearyl acyloxy Aluminate 10-20 part, isopropyl tri (dioctylpyrophosphato)titanate 30-40 part, isopropyl triisostearoyltitanate 30-40 part.CN200810115336.7 discloses a kind of heat conductive silicone grease composition, forms primarily of organic silicone oil, silane coupling agent and conduction powder; Wherein silane coupling agent covers the surface of conduction powder; Conduction powder is joined by large, medium and small three kinds of particle diameter powder poles and is formed, and involved metal-powder is through Overheating Treatment and form layer oxide film on metal-powder surface.
Domestic and international investigator has carried out a large amount of research and development and modification to organosilicon thermally conductive material, forms a series of thermal conductive silicon material gradually, as heat-conducting silica gel sheet, joint sealant, heat-conducting silicone grease etc.The research adopting mineral filler (glass fibre, carbon fiber, whisker etc.) to prepare super-high heat-conductive matrix material in recent years more and more receives publicity, and is widely used in electron trade.Adding of some thermally conductive materials such as carbon nanotube, phase transformation capsule etc., improve production cost to a certain extent.
Summary of the invention
The object of this invention is to provide a kind of low cost, heat-conducting silicone grease that cost performance is high, this heat-conducting silicone grease has remarkable thermal conductivity, electrical insulating property, weathering resistance, hydrophobicity, physiological inertia and less surface tension, there is lower temperature coefficient of viscosity, higher resistance to compression in addition, and corrosion-free effect, product cost is high, can be used as the gap filling dielectric material between electronic devices and components and radiator element.
Technical scheme of the present invention is as follows: a kind of heat-conducting silicone grease, be by MethylethoxylsiliconFluid Fluid 67 parts, fibrous nano carbon pipe 16 parts, 25 parts, aluminum oxide, waste rubber nano powder 12 parts, silylation quaternary ammonium salt phase transfer catalyst 0.2 part, organic silica oil 3.5 parts, silane coupling agent 8 parts, antioxidant 1076 0.8 part, adopt following steps preparation:
(1) by fibrous nano carbon pipe at the dry 10min of vacuum tightness 0.03MPa, dried CNT (carbon nano-tube) and aluminum oxide, waste rubber nano powder, silane coupling agent are added in high speed dispersor, stir 5 ~ 10min with rotating speed 800 ~ 1000r/min, be uniformly mixed while be heated to 180 ~ 200 DEG C;
(2) successively MethylethoxylsiliconFluid Fluid, organic silica oil, silylation quaternary ammonium salt phase transfer catalyst, antioxidant 1076 are added in dispersion machine, continue stirring 10 ~ 15min, stir and terminate to adopt end runner mill to mixture grinding 1 ~ 2.5 hour, to obtain final product.
Preferably, described silane coupling agent is methoxy silane or Ethoxysilane or aminosilane.The particle diameter of described waste rubber nano powder preferably 0.1 ~ 10 μm.The preferred ball-aluminium oxide of described aluminum oxide.
Except the main component in formula of the present invention, other processing aid can also be added according to need of production, such as stablizer, fire retardant, pigment, promotor etc.
The present invention adopts fibrous nano carbon pipe, aluminum oxide, waste rubber nano powder is composite as heat-conductive insulation filling, improve product heat conductivility, rubber nano micro mist can increase the mobility of product in preparation process, blind, obtain larger heat transfer ratio surface-area, final heat-conducting silicone grease product is made to have remarkable thermal conductivity, electrical insulating property, weathering resistance, hydrophobicity, physiological inertia and less surface tension, lower temperature coefficient of viscosity, higher resistance to compression, and corrosion-free effect, product cost is high, can be used as the gap filling dielectric material between electronic devices and components and radiator element.
Embodiment
Be described in further details the present invention below by embodiment, these embodiments are only used for the present invention is described, do not limit the scope of the invention.
Embodiment 1 adopts the raw material of following weight part: MethylethoxylsiliconFluid Fluid 67 parts, fibrous nano carbon pipe 16 parts, 25 parts, aluminum oxide, waste rubber nano powder 12 parts, silylation quaternary ammonium salt phase transfer catalyst 0.2 part, organic silica oil 3.5 parts, methoxy silane 8 parts, antioxidant 1076 0.8 part, prepares as follows:
(1) by fibrous nano carbon pipe at the dry 10min of vacuum tightness 0.03MPa, dried CNT (carbon nano-tube) and aluminum oxide, waste rubber nano powder, methoxy silane coupling agent are added in high speed dispersor, stir 5min with rotating speed 900r/min, be uniformly mixed while be heated to 180 DEG C;
(2) successively MethylethoxylsiliconFluid Fluid, organic silica oil, silylation quaternary ammonium salt phase transfer catalyst, antioxidant 1076 are added in dispersion machine, continue to stir 15min, stir and terminate to adopt end runner mill to grind 2 hours to mixture, obtain heat-conducting silicone grease of the present invention.
Embodiment 2 adopts the raw material of following weight part: MethylethoxylsiliconFluid Fluid 67 parts, fibrous nano carbon pipe 16 parts, 25 parts, aluminum oxide, waste rubber nano powder 12 parts, silylation quaternary ammonium salt phase transfer catalyst 0.2 part, organic silica oil 3.5 parts, aminosilane 8 parts, antioxidant 1076 0.8 part, prepares as follows:
(1) by fibrous nano carbon pipe at the dry 10min of vacuum tightness 0.03MPa, dried CNT (carbon nano-tube) and aluminum oxide, waste rubber nano powder, amino silicane coupling agent are added in high speed dispersor, stir 10min with rotating speed 800r/min, be uniformly mixed while be heated to 200 DEG C;
(2) successively MethylethoxylsiliconFluid Fluid, organic silica oil, silylation quaternary ammonium salt phase transfer catalyst, antioxidant 1076 are added in dispersion machine, continue to stir 10min, stir and terminate to adopt end runner mill to grind 2.5 hours to mixture, obtain heat-conducting silicone grease of the present invention.
Claims (4)
1. a heat-conducting silicone grease, it is characterized in that: the raw material by following weight part: MethylethoxylsiliconFluid Fluid 67 parts, fibrous nano carbon pipe 16 parts, 25 parts, aluminum oxide, waste rubber nano powder 12 parts, silylation quaternary ammonium salt phase transfer catalyst 0.2 part, organic silica oil 3.5 parts, silane coupling agent 8 parts, antioxidant 1076 0.8 part, adopt following steps preparation:
(1) by fibrous nano carbon pipe at the dry 10min of vacuum tightness 0.03MPa, dried CNT (carbon nano-tube) and aluminum oxide, waste rubber nano powder, silane coupling agent are added in high speed dispersor, stir 5 ~ 10min with rotating speed 800 ~ 1000r/min, be uniformly mixed while be heated to 180 ~ 200 DEG C;
(2) successively MethylethoxylsiliconFluid Fluid, organic silica oil, silylation quaternary ammonium salt phase transfer catalyst, antioxidant 1076 are added in dispersion machine, continue stirring 10 ~ 15min, stir and terminate to adopt end runner mill to mixture grinding 1 ~ 2.5 hour, to obtain final product.
2. heat-conducting silicone grease according to claim 1, is characterized in that: described silane coupling agent is methoxy silane or Ethoxysilane or aminosilane.
3. heat-conducting silicone grease according to claim 1, is characterized in that: the particle diameter of described waste rubber nano powder 0.1 ~ 10 μm.
4. heat-conducting silicone grease according to claim 1, is characterized in that: described aluminum oxide is ball-aluminium oxide.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201410774216.3A CN104530713A (en) | 2014-12-16 | 2014-12-16 | Heat-conducting silicone grease |
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| CN201410774216.3A CN104530713A (en) | 2014-12-16 | 2014-12-16 | Heat-conducting silicone grease |
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| CN104530713A true CN104530713A (en) | 2015-04-22 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106700555A (en) * | 2017-01-18 | 2017-05-24 | 东莞市新懿电子材料技术有限公司 | High thermal conductive silicone grease and preparation method thereof |
| CN109762340A (en) * | 2019-01-21 | 2019-05-17 | 东莞优邦材料科技股份有限公司 | A kind of activity silicone oil and its low pollution heat conductive silicone grease composition |
| CN110320693A (en) * | 2018-03-30 | 2019-10-11 | 夏普株式会社 | The manufacturing method of display device and display device |
| CN113881103A (en) * | 2021-09-26 | 2022-01-04 | 深圳市飞荣达科技股份有限公司 | Aluminum powder surface modification method, modified aluminum powder and application thereof |
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| US20070293624A1 (en) * | 2006-06-16 | 2007-12-20 | Shin-Etsu Chemical Co., Ltd. | Heat conductive silicone grease composition |
| KR20110121881A (en) * | 2010-05-03 | 2011-11-09 | 주식회사 케이씨씨 | Silicone composition having excellent long-term storage stability and heat-radiating function |
| CN103602075A (en) * | 2013-11-25 | 2014-02-26 | 厦门安耐伟业新材料有限公司 | Composite heat-conducting silicone grease and preparation method thereof |
| CN103740108A (en) * | 2014-01-17 | 2014-04-23 | 华为技术有限公司 | High-thermal-conductivity elastic composite material and preparation method thereof |
-
2014
- 2014-12-16 CN CN201410774216.3A patent/CN104530713A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070293624A1 (en) * | 2006-06-16 | 2007-12-20 | Shin-Etsu Chemical Co., Ltd. | Heat conductive silicone grease composition |
| KR20110121881A (en) * | 2010-05-03 | 2011-11-09 | 주식회사 케이씨씨 | Silicone composition having excellent long-term storage stability and heat-radiating function |
| CN103602075A (en) * | 2013-11-25 | 2014-02-26 | 厦门安耐伟业新材料有限公司 | Composite heat-conducting silicone grease and preparation method thereof |
| CN103740108A (en) * | 2014-01-17 | 2014-04-23 | 华为技术有限公司 | High-thermal-conductivity elastic composite material and preparation method thereof |
Non-Patent Citations (2)
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| 周文英，等: "《导热高分子材料》", 30 April 2014, 国防工业出版社 * |
| 曹海琳，等: ""橡胶微粉对无机聚合物胶凝材料力学性能的影响"", 《材料导报B：研究篇》 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106700555A (en) * | 2017-01-18 | 2017-05-24 | 东莞市新懿电子材料技术有限公司 | High thermal conductive silicone grease and preparation method thereof |
| CN110320693A (en) * | 2018-03-30 | 2019-10-11 | 夏普株式会社 | The manufacturing method of display device and display device |
| CN109762340A (en) * | 2019-01-21 | 2019-05-17 | 东莞优邦材料科技股份有限公司 | A kind of activity silicone oil and its low pollution heat conductive silicone grease composition |
| CN113881103A (en) * | 2021-09-26 | 2022-01-04 | 深圳市飞荣达科技股份有限公司 | Aluminum powder surface modification method, modified aluminum powder and application thereof |
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Application publication date: 20150422 |