阅读说明：本技术 一种导热硅脂 (Heat-conducting silicone grease ) 是由 吕鸿图 韩开林 于 2021-07-14 设计创作，主要内容包括：本发明涉及一种散热材料领域,具体是一种导热硅脂,导热硅脂包括以下成分组成：液态硅树脂10～15％,氧化锌50-60％,氧化铝20～40％,苯胺甲基三甲氧基硅烷1～1.5％；导热硅脂制备方法包括如下步骤：步骤一：将液态硅树脂与硅烷偶联剂倒入行星分散机中,加入苯胺甲基三甲氧基硅烷,搅拌30min(转速200～300r/min)；步骤二：对步骤一混合物依次加入氧化锌、氧化铝；步骤三：粉体全部加完后搅拌2H(转速600～800r/min),得到最终产品；步骤四：对步骤三生产的硅脂进行检测。本发明采用苯胺甲基三甲氧基硅烷作为偶联剂,在粉体的表面包裹一层苯胺甲基三甲氧基硅烷,增加粉体在树脂中的稳定性,大幅度提高导热硅脂的储存时间,同时不降低硅脂的导热性能,实用性强。(The invention relates to the field of heat dissipation materials, in particular to heat-conducting silicone grease which comprises the following components: 10-15% of liquid silicone resin, 50-60% of zinc oxide, 20-40% of aluminum oxide and 1-1.5% of aniline methyl trimethoxy silane; the preparation method of the heat-conducting silicone grease comprises the following steps: the method comprises the following steps: pouring liquid silicon resin and a silane coupling agent into a planetary dispersion machine, adding aniline methyl trimethoxy silane, and stirring for 30min (the rotating speed is 200-300 r/min); step two: sequentially adding zinc oxide and aluminum oxide into the mixture obtained in the first step; step three: stirring for 2H (rotating speed of 600-800 r/min) after all the powder is added to obtain a final product; step four: and C, detecting the silicone grease produced in the step three. According to the invention, the aniline methyl trimethoxy silane is used as a coupling agent, and the surface of the powder is coated with a layer of aniline methyl trimethoxy silane, so that the stability of the powder in resin is improved, the storage time of the heat-conducting silicone grease is greatly prolonged, the heat-conducting property of the silicone grease is not reduced, and the practicability is high.)

1. The heat-conducting silicone grease is characterized by comprising the following components: 10-15% of liquid silicone resin, 50-60% of zinc oxide, 20-40% of aluminum oxide and 1-1.5% of aniline methyl trimethoxy silane;

the liquid silicone resin is long-chain alkyl modified dimethyl siloxane.

2. The heat conductive silicone grease as claimed in claim 1, wherein the viscosity of the liquid silicone resin is 500-600 mpa.s.

3. The heat conductive silicone grease as claimed in claim 1, wherein the zinc oxide is a flaky zinc oxide.

4. The heat-conducting silicone grease as claimed in claim 1, wherein the zinc oxide has a particle size of 1-3 um.

5. The heat conductive silicone grease as claimed in claim 1, wherein the alumina is spherical alumina.

6. The heat conductive silicone grease of claim 1, wherein the alumina particle size is 1-3 um.

7. The heat-conductive silicone grease as claimed in claim 1, wherein the CAS number of the aniline methyl trimethoxy silane is: 77855-73-3.

8. The heat-conducting silicone grease as claimed in claim 1, wherein the preparation method of the heat-conducting silicone grease comprises the following steps:

the method comprises the following steps: pouring liquid silicon resin and a silane coupling agent into a planetary dispersion machine, adding aniline methyl trimethoxy silane, and stirring for 30min (the rotating speed is 200-300 r/min);

step two: sequentially adding zinc oxide and aluminum oxide into the mixture obtained in the first step;

step three: stirring for 2H (rotating speed of 600-800 r/min) after all the powder is added to obtain a final product;

step four: and C, detecting the silicone grease produced in the step three.

9. The heat-conducting silicone grease as claimed in claim 8, wherein the zinc oxide and the aluminum oxide are added in the second step, and each powder is added after being fully stirred for 30min (rotation speed of 200-300 r/min).

10. The heat-conducting silicone grease as claimed in claim 8, wherein the four-step detection indexes include K value, viscosity (25 ℃) and 5-year state of normal-temperature closed storage.

Technical Field

The invention relates to the field of heat dissipation materials, in particular to heat-conducting silicone grease.

Background

The silicone grease is refined by using refined synthetic oil as base oil and adding a structural stabilizer and an anti-corrosion additive, has good waterproof sealing property, water resistance, solvent resistance and anti-creeping property, does not corrode metal, has good adaptability with rubber, and is used for waterproof sealing and lubrication of bathroom equipment, sealing rings and the electronic and electrical industry;

the patent with the application number of CN201610938547.5 discloses a carbon nano tube/heat-conducting silicone grease composite material and a preparation method thereof, wherein the carbon nano tube/heat-conducting silicone grease composite material comprises 10-15 wt% of methyl silicone oil, 35-60 wt% of aluminum nitride, 20-40 wt% of silicon carbide, 5-9 wt% of nano silver wires and 20-30 wt% of dispersing agent, the mass ratio of the carbon nano tube to the heat-conducting silicone grease is 0.01-0.1: 1, the purpose is to improve the controllability of the silicone grease, the cost performance is high, the practicability is good, the carbon nano tube/heat-conducting silicone grease composite material is suitable for industrial large-scale production, and the prepared composite material has good heat dissipation, heat resistance, sealing and mechanical properties; however, silicone grease is divided into heat-conducting silicone grease and lubricating silicone grease because metal powder, metal oxide powder and liquid resin are insoluble, and after long-time storage, powder and liquid resin can be separated, so that the silicone grease cannot be used.

Disclosure of Invention

The invention aims to provide a heat-conducting silicone grease, which adopts aniline methyl trimethoxy silane as a coupling agent, coats a layer of aniline methyl trimethoxy silane on the surface of powder, increases the stability of the powder in resin, greatly improves the storage time of the heat-conducting silicone grease, does not reduce the heat-conducting property of the silicone grease, and has strong practicability.

The purpose of the invention can be realized by the following technical scheme:

a heat-conducting silicone grease, which comprises the following components: 10-15% of liquid silicone resin, 50-60% of zinc oxide, 20-40% of aluminum oxide and 1-1.5% of aniline methyl trimethoxy silane;

the liquid silicone resin is long-chain alkyl modified dimethyl siloxane.

Further, the viscosity of the liquid silicone resin is 500-600 mpa.s.

Further, the zinc oxide is flake zinc oxide.

Further, the particle size of the zinc oxide is 1-3 um.

Further, the alumina is spherical alumina.

Further, the particle size of the aluminum oxide is 1-3 um.

Further, the CAS number of the aniline methyl trimethoxy silane is as follows: 77855-73-3.

Further, the preparation method of the heat-conducting silicone grease comprises the following steps:

the method comprises the following steps: pouring liquid silicon resin and a silane coupling agent into a planetary dispersion machine, adding aniline methyl trimethoxy silane, and stirring for 30min (the rotating speed is 200-300 r/min);

step two: sequentially adding zinc oxide and aluminum oxide into the mixture obtained in the first step;

step three: stirring for 2H (rotating speed of 600-800 r/min) after all the powder is added to obtain a final product;

step four: and C, detecting the silicone grease produced in the step three.

And further, adding the zinc oxide and the aluminum oxide in the second step, and adding the next powder after fully stirring for 30min (rotating speed of 200-300 r/min) every time one powder is added.

Further, the detection indexes of the fourth step comprise a K value, viscosity (25 ℃) and a state of being stored for 5 years in a sealed mode at normal temperature.

The invention has the beneficial effects that:

1. according to the invention, the aniline methyl trimethoxy silane is used as a coupling agent, and the surface of the powder is coated with a layer of aniline methyl trimethoxy silane, so that the stability of the powder in resin is improved, the storage time of the heat-conducting silicone grease is greatly prolonged, the heat-conducting property of the silicone grease is not reduced, and the practicability is high.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.

A heat-conducting silicone grease comprises the following components: 10-15% of liquid silicone resin, 50-60% of zinc oxide, 20-40% of aluminum oxide and 1-1.5% of aniline methyl trimethoxy silane;

the liquid silicone resin is long-chain alkyl modified dimethyl siloxane, and the viscosity is 500-600 mpa.s;

the zinc oxide is flaky zinc oxide with the particle size of 1-3 um, and the aluminum oxide is spherical aluminum oxide with the particle size of 1-3 um; the CAS number for Anilinomethyltrimethoxysilane is: 77855-73-3.

The preparation method of the heat-conducting silicone grease comprises the following steps:

the method comprises the following steps: pouring liquid silicon resin and a silane coupling agent into a planetary dispersion machine, adding aniline methyl trimethoxy silane, and stirring for 30min (the rotating speed is 200-300 r/min);

step two: sequentially adding zinc oxide and aluminum oxide into the mixture obtained in the first step, and adding the next powder after fully stirring for 30min (rotating speed of 200-300 r/min) every time one powder is added;

step three: stirring for 2H (rotating speed of 600-800 r/min) after all the powder is added to obtain a final product;

step four: and C, detecting the silicone grease produced in the step three.

Implementing one step:

a heat-conducting silicone grease comprises the following components: 15 parts of liquid silicone resin, 52 parts of zinc oxide, 32 parts of aluminum oxide and 1 part of aniline methyl trimethoxy silane.

The preparation method of the heat-conducting silicone grease comprises the following steps:

the method comprises the following steps: pouring liquid silicon resin and a silane coupling agent into a planetary dispersion machine, adding aniline methyl trimethoxy silane, and stirring for 30min (the rotating speed is 200-300 r/min);

step two: sequentially adding zinc oxide and aluminum oxide into the mixture obtained in the first step, and adding the next powder after fully stirring for 30min (rotating speed of 200-300 r/min) every time one powder is added;

step three: stirring for 2H (rotating speed of 600-800 r/min) after all the powder is added to obtain a final product;

step four: and C, detecting the silicone grease produced in the step three.

Detecting the main properties of the prepared heat-conducting silicone grease:

the K value is 2.5 w/(m.k);

viscosity (25 ℃): 500.000 mpa.s;

the product is stored in a sealed way at normal temperature for 5 years, and the physical properties of the product are not changed.

The second implementation:

a heat-conducting silicone grease comprises the following components: 10.5 parts of liquid silicone resin, 50 parts of zinc oxide, 38 parts of aluminum oxide and 1.5 parts of aniline methyl trimethoxy silane.

The preparation method of the heat-conducting silicone grease comprises the following steps:

the method comprises the following steps: pouring liquid silicon resin and a silane coupling agent into a planetary dispersion machine, adding aniline methyl trimethoxy silane, and stirring for 30min (the rotating speed is 200-300 r/min);

step two: sequentially adding zinc oxide and aluminum oxide into the mixture obtained in the first step, and adding the next powder after fully stirring for 30min (rotating speed of 200-300 r/min) every time one powder is added;

step three: stirring for 2H (rotating speed of 600-800 r/min) after all the powder is added to obtain a final product;

step four: and C, detecting the silicone grease produced in the step three.

Detecting the main properties of the prepared heat-conducting silicone grease:

the K value is 3.0 w/(m.k);

viscosity (25 ℃): 800.000 mpa.s;

the physical properties of the product do not change after the product is hermetically stored for 5 years at normal temperature.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.