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Insulating and heat-conducting silicone grease and preparation method thereof

A technology of insulating thermal conductivity and silicone grease, applied in chemical instruments and methods, materials for heat exchange, etc., can solve the problems of neglecting the stability of non-Newtonian fluid colloids, not examining the huge influence of thermal conductivity and coating performance, etc., to achieve excellent Colloidal stability, effects of improved colloidal stability, good coatability and lubricity

Inactive Publication Date: 2014-04-09
无锡中石油润滑脂有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The research on the above-mentioned thermal conductive silicone grease mainly focuses on the realization of high thermal conductivity, and ignores the colloidal stability that should be possessed as a non-Newtonian fluid. Great influence on coating performance

Method used

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  • Insulating and heat-conducting silicone grease and preparation method thereof
  • Insulating and heat-conducting silicone grease and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] 10 parts of phenylmethyl silicone oil with a kinematic viscosity of 500cst at 25°C, 10 parts of dimethyl silicone oil with a kinematic viscosity of 60000cst at 25°C, 40 parts of modified zinc oxide, 25 parts of spherical alumina, 1 part of fumed silica, 1 part PTFE, 0.5 parts of BYK310, 0.2 parts of L135, 0.3 parts of L57 are mixed evenly and then ground three times by a three-roller mill, then transferred to a stainless steel kettle, adding 12 parts of benzyl silicone oil with a kinematic viscosity of 500cst at 25°C, and heating Keep warm at 110°C, filter with 120-mesh copper wire mesh, reflow and shear for 1 hour, the shear pressure is 0.04MPa, degas with a pump for 30 minutes, and then pack to obtain the finished product. The physical and chemical indicators are shown in Table 1.

Embodiment 2

[0026] 15 parts of phenylmethyl silicone oil with a kinematic viscosity of 1000cst at 25°C, 15 parts of dimethyl silicone oil with a kinematic viscosity of 60000cst at 25°C, 45 parts of modified zinc oxide, 10 parts of boron nitride, 2 parts of fumed silica, 1.5 parts Liquid benzotriazole fatty amine salt, 1 part of BYK161, 0.3 part of L135, 0.2 part of L01 are mixed evenly and then ground three times with a three-roll mill, then transferred to a stainless steel kettle, and 10 parts of benzyl with a kinematic viscosity of 500cst at 25°C are added Silicone oil, heat up to 90°C and keep it warm, filter with 120-mesh copper wire mesh, reflow and shear for 1 hour, shear pressure 0.04MPa, degas with a pump for 30 minutes, and then pack to obtain the finished product. The physical and chemical indicators are shown in Table 1.

Embodiment 3

[0028] 15 parts of simethicone oil with a kinematic viscosity of 100cst at 25°C, 15 parts of simethicone oil with a kinematic viscosity of 60000cst at 25°C, 30 parts of spherical alumina, 20 parts of boron nitride, 10 parts of nano-alumina, 2 parts of polytetrafluoroethylene Vinyl fluoride, 2 parts of organic bentonite, 0.5 parts of BYK390, 0.2 parts of L135, 0.3 parts of L57 are mixed evenly and then ground three times with a three-roll mill, then transferred to a stainless steel kettle, and 5 parts of dimethyl Silicone oil, heat up to 90°C and keep it warm, filter with 120-mesh copper wire mesh, reflow and shear for 1 hour, shear pressure 0.04MPa, degas with a pump for 30 minutes, and then pack to obtain the finished product. The physical and chemical indicators are shown in Table 1.

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Abstract

The invention discloses insulating and heat-conducting silicone grease. The insulating and heat-conducting silicone grease consists of the following raw materials in parts by weight: 10-40 parts of organic silicon oil, 50-80 parts of heat-conducting powder, 0.5-4 parts of a structure improver, 0.5-3 parts of rheological aid, 0.5-5 parts of a friction modifier and 0.1-2 parts of an antioxidant. The insulating and heat-conducting silicone grease prepared by the invention is excellent in heat-conducting performance and low in cost, and is widely applicable to heat radiators requiring effective cooling in the industry, such as heat transmission for a gap where a diode and a substrate (aluminum or copper plate) are in contact, and heat conduction and insulation of a rectifier, electric and the like.

Description

technical field [0001] The invention relates to the technical field of organic silicon materials, in particular to a heat-conducting silicone grease. Background technique [0002] With the continuous and in-depth development of the modern electronics industry, electronic equipment requires miniaturization, strong performance, and long life. For example, the CPU and graphics card in computer equipment have a higher degree of miniaturization and integration, which puts forward almost strict requirements on the heat dissipation of components. High-power tubes, thyristors, and electronic components with heat sinks or heat sinks in industrial equipment also require improved heat dissipation to prolong service life and stability. In some special occasions such as space vehicles, it is necessary to solve the problem of excessive temperature difference between the instrument and the mounting plate on the satellite. [0003] Thermally conductive silicone grease has excellent therma...

Claims

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Application Information

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IPC IPC(8): C08L83/04C08L83/07C08L83/05C08L83/06C08L83/08C09K5/14C08K13/02C08K3/22C08K13/06C08K9/00C08K3/38C08K3/36C08K9/04C08K3/34C08K5/098C08K5/3477
Inventor 刘虎华志宏杨晓钧安华瑞王晓龙
Owner 无锡中石油润滑脂有限责任公司
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