阅读说明：本技术 一种高可靠性导热硅脂的制备方法 (Preparation method of high-reliability heat-conducting silicone grease ) 是由 陈洁 于 2019-09-25 设计创作，主要内容包括：本发明公开了一种高可靠性导热硅脂的制备方法,属于导热硅脂的制备技术领域,所述制备方法包括如下步骤：(1)将80-100重量份的金属氧化物投入15-20份的有机硅油,并投入0.1-5份的处理剂,得到第一混合物；(2)通过捏合机对所述第一混合物进行捏合0.5-2小时,得到第二混合物；(3)将捏合后的所述第二混合物在真空环境中加热,加热温度为：85℃-140℃,加热0.5-2小时；(4)加热完成后破真空冷却得到所需的高可靠性导热硅脂。通过本方法制备得到的高可靠性导热硅脂内部具有较强的作用力,因此在冷热循环下具有抵抗被挤出热源的风险。(The invention discloses a preparation method of high-reliability heat-conducting silicone grease, belonging to the technical field of preparation of heat-conducting silicone grease, and the preparation method comprises the following steps: (1) adding 80-100 parts by weight of metal oxide into 15-20 parts by weight of organic silicone oil, and adding 0.1-5 parts by weight of treating agent to obtain a first mixture; (2) kneading the first mixture through a kneader for 0.5 to 2 hours to obtain a second mixture; (3) heating the kneaded second mixture in a vacuum environment at a temperature of: heating at 85-140 deg.c for 0.5-2 hr; (4) and breaking vacuum and cooling after heating to obtain the required high-reliability heat-conducting silicone grease. The high-reliability heat-conducting silicone grease prepared by the method has strong acting force in the interior, so that the high-reliability heat-conducting silicone grease has the risk of resisting an extruded heat source under cold and hot circulation.)

1. A preparation method of high-reliability heat-conducting silicone grease is characterized by comprising the following steps: the method comprises the following steps:

(1) adding 80-100 parts by weight of metal oxide into 15-20 parts by weight of organic silicone oil, and adding 0.1-5 parts by weight of surface silicon-based treating agent to obtain a first mixture;

(2) kneading the first mixture through a kneader for 0.5 to 2 hours to obtain a second mixture;

(3) heating the kneaded second mixture in a vacuum environment at a temperature of: heating at 85-140 deg.c for 0.5-2 hr;

(4) and breaking vacuum and cooling after heating to obtain the required high-reliability heat-conducting silicone grease.

2. The method for preparing the highly reliable heat-conducting silicone grease as claimed in claim 1, wherein: the metal oxide is alumina.

3. The method for preparing the highly reliable heat-conducting silicone grease as claimed in claim 1, wherein: the organic silicone oil is one or a mixture of methyl silicone oil, vinyl silicone oil or quinyl silicone oil.

4. The method for preparing the highly reliable heat-conducting silicone grease as claimed in claim 1, wherein: the organic silicone oil is methyl silicone oil.

5. The method for preparing the highly reliable heat-conducting silicone grease as claimed in claim 1, wherein: the treating agent is one or a mixture of two of Z3J type treating agent produced by morning light company and X50 type treating agent produced by Yijiamei company.

Technical Field

The invention relates to the technical field of preparation of heat-conducting silicone grease, in particular to a preparation method of high-reliability heat-conducting silicone grease.

Background

The heat-conducting silicone grease is commonly called as heat-dissipating paste, is a heat-conducting silicone grease-like compound, and is used for heat conduction and heat dissipation of electronic components such as power amplifiers, transistors, electron tubes, CPUs (central processing units) and the like, so that the stability of the electrical performance of electronic instruments, meters and the like is ensured.

The existing heat-conducting silicone grease has low strength and is a loose and simple mixture of liquid and solid. When the heat conduction silicone grease is coated between a heat source and a heat radiator, the heat source and the heat radiator have slight deformation during cold and hot circulation due to the fact that the thermal expansion coefficients of the heat radiator and the heat source are different, so that a breathing phenomenon is formed, and the continuous deformation breathing phenomenon can cause the heat conduction silicone grease between the heat source and the heat radiator to be extruded out of a working range, so that the heat conduction silicone grease between the heat source and the heat radiator is not available, and thermal runaway is caused. Therefore, it is desirable to provide a thermally conductive silicone grease with a strong internal force to prevent the heat source from being squeezed out during the cooling and heating cycles.

Disclosure of Invention

The invention aims to provide a preparation method of high-reliability heat-conducting silicone grease with strong internal acting force.

In order to solve the technical problems, the technical scheme of the invention is as follows:

a preparation method of high-reliability heat-conducting silicone grease comprises the following steps:

(1) adding 80-100 parts by weight of metal oxide into 15-20 parts by weight of organic silicone oil, and adding 0.1-5 parts by weight of treating agent to obtain a first mixture;

(2) kneading the first mixture through a kneader for 0.5 to 2 hours to obtain a second mixture;

(3) heating the kneaded second mixture in a vacuum environment at a temperature of: heating at 85-140 deg.c for 0.5-2 hr;

(4) and breaking vacuum and cooling after heating to obtain the required high-reliability heat-conducting silicone grease.

Preferably, the metal oxide is aluminum oxide which is wide in source and low in price, the production cost can be effectively controlled, and the application range of the heat-conducting silicone grease prepared by the method is improved.

Preferably, the organic silicone oil is one or a mixture of methyl silicone oil, vinyl silicone oil or quinyl silicone oil.

Preferably, the organic silicone oil is methyl silicone oil, and methyl silicone has the advantages of being tasteless, non-toxic, physiologically inert, good in chemical stability, electric insulation, weather resistance, wide in viscosity range, low in freezing point and the like, and has good advantages when being applied to the field of heat-conducting silicone grease.

Preferably, the treating agent is one or a mixture of two of a Z3J type treating agent produced by morning light company and an X50 type treating agent produced by Yijiamei company.

By adopting the technical scheme, the high-reliability heat-conducting silicone grease prepared by the method has strong acting force inside and has the risk of resisting an extruded heat source under the cold and hot circulation, so that the effective stable heat-conducting and heat-radiating effects between the heat source and a radiator are ensured.

Drawings

FIG. 1 is a graph showing the results of 1000-hour aging of the thermally conductive silicone grease prepared in example 1 under high and low temperature impact;

FIG. 2 is a graph showing the results of commercial product A after 1000 hours of aging on high and low temperature impact;

FIG. 3 is a table comparing the data of the thermally conductive silicone grease prepared in example 1 and the commercially available general thermally conductive silicone grease after 1000 hours of aging under high and low temperature impact.

In the figure, 1-glass plate, 2-thermally conductive silicone grease prepared in example 1, and 3-commercially available product a.

Detailed Description

The following further describes the embodiments of the present invention. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.