High heat conduction organosilicon dip varnish

A silicone impregnation, high thermal conductivity technology, applied in coatings and other directions, can solve problems such as low thermal conductivity, and achieve the effect of improving thermal conductivity, good mechanical and electrical properties, and excellent thermal conductivity.

Inactive Publication Date: 2011-09-28
ZHUZHOU TIMES NEW MATERIALS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is mainly to solve the problem that the thermal conductivity of the existing organosilicon impregnating varnish is too low, and to provide a kind of high thermal conductivity organosilicon impregnating varnish

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh 10 parts of aluminum nitride with an average particle size of 11 μm, 6 parts of aluminum nitride with an average particle size of 5 μm, and 4 parts of aluminum nitride with an average particle size of 20 nm. After mixing evenly, add aluminum nitride filler to 40 Parts of the silicone prepolymer; the silicone prepolymer contains two groups: Si-CH=CH 2 Silicone prepolymer based on Si-H group, silicone prepolymer can be added and cured under the combined action of catalyst and curing agent; then add 0.1 part of catalyst and 0.3 part of curing agent, and mix evenly through ball milling. A high thermal conductivity silicone impregnation paint can be obtained.

[0017] The catalyst is a platinum compound that catalyzes the hydrosilylation reaction, specifically chloroplatinic acid, platinum olefin complex, platinum vinyl siloxane complex, platinum phosphorus complex, platinum alcohol complex or platinum black.

[0018] Described curing agent is the used curing agent o...

Embodiment 2

[0020] Weigh 11.8 parts of aluminum nitride with an average particle size of 11 μm, 15.5 parts of aluminum nitride with an average particle size of 5 μm, and 11.7 parts of aluminum nitride with an average particle size of 20 nm. After mixing evenly, add aluminum nitride filler to 60 Parts of the silicone prepolymer; the silicone prepolymer contains two groups: Si-CH=CH 2 Silicone prepolymer based on Si-H group, silicone prepolymer can be added and cured under the combined action of catalyst and curing agent; then add 0.5 parts of catalyst and 0.1 part of curing agent, and mix evenly through ball milling. A high thermal conductivity silicone impregnation paint can be obtained.

[0021] The catalyst is a platinum compound that catalyzes the hydrosilylation reaction, specifically chloroplatinic acid, platinum olefin complex, platinum vinyl siloxane complex, platinum phosphorus complex, platinum alcohol complex or platinum black.

[0022] Described curing agent is the used curin...

Embodiment 3

[0024] Weigh 25 parts of aluminum nitride with an average particle size of 11 μm, 20 parts of aluminum nitride with an average particle size of 5 μm, and 15 parts of aluminum nitride with an average particle size of 20 nm. After mixing evenly, add aluminum nitride filler to 80 Parts of the silicone prepolymer; the silicone prepolymer contains two groups: Si-CH=CH 2 Silicone prepolymers based on Si-H groups, silicone prepolymers can be added and cured under the combined action of catalysts and curing agents; add 1.0 parts of catalysts and 1.0 parts of curing agents, and mix evenly through ball milling. A high thermal conductivity silicone impregnation paint can be obtained.

[0025] The catalyst is a platinum compound that catalyzes the hydrosilylation reaction, specifically chloroplatinic acid, platinum olefin complex, platinum vinyl siloxane complex, platinum phosphorus complex, platinum alcohol complex or platinum black.

[0026] Described curing agent is the used curing a...

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Abstract

The invention relates to silicone impregnating varnish with high thermal conduction. The impregnating varnish is prepared by the following steps: three aluminum nitride powder bodies which have different average particle sizes and have high thermal conductivity and high insulating property are mixed to prepare a mixed aluminum nitride powder body filler; the mixed aluminum nitride powder body filler after being mixed is added into a silicone prepolymer; a catalyst and a curing agent are added into the mixture and are subjected to the prior ball milling and even mixing to obtain the silicone impregnating varnish with high thermal conduction; and the mixture ratio of the mixed aluminum nitride powder body filler, the silicone prepolymer, the catalyst and the curing agent is as follows: 20 to 60 portions of the mixed aluminum nitride powder body filler, 40 to 80 portions of the silicone prepolymer, 0.01 to 1 portion of the catalyst and 0.01 to 1 portion of the curing agent. The mixed aluminum nitride powder body filler has three types of the average particle sizes: the particle size of a large particle is between 10 and 20 mu m, the particle size of a small particle is between 10 and50 nm; the particle size of the third particle is between the particle sizes of the large particle and the small particle; the average particle diameter is between 5 and 10 mu m; and the volumes of the large, the middle and the small particles are respectively between 30 and 55 percent, between 30 and 40 percent and between 20 and 40 percent.

Description

technical field [0001] The invention relates to a paint-like chemical raw material, in particular to a high-thermal-conductivity organosilicon impregnating varnish, which is mainly used in the insulation impregnation treatment of motors, transformers, and loose-resistance winding coils. Background technique [0002] Impregnation varnish is a kind of insulating material, which is mainly used in the insulation impregnation treatment of motors, transformers and discrete winding coils, mainly for electrical insulation and bonding. Electrical insulation dipping varnishes include solvent-based varnishes and solvent-free varnishes. Due to the solvent-containing paint, its curing volatile content is relatively high, its viscosity can be very low, and it has good permeability to electrical coils and windings, but the baking time is long, the mechanical and electrical properties of the baked workpiece are poor, and there are some problems during the curing process. A large number of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D183/04C09D5/25C09D5/00
Inventor 李鸿岩王文进姜其斌衷敬和
Owner ZHUZHOU TIMES NEW MATERIALS TECH
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