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Preparation method of epoxy-modified insulated thermal-conductive high-temperature resistant organosilicon coating and its products

A high-temperature-resistant coating and epoxy modification technology, applied in the direction of coating, etc., to achieve the effect of easy conditions, convenient application, and good insulation

Active Publication Date: 2012-07-11
DONGGUAN HONGDA POLYUREFHANE RESIN +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to address the problems existing in the current coatings, to provide a simple, reasonable, efficient and industrialized method for preparing epoxy-modified silicone insulating, heat-conducting, and high-temperature-resistant coatings, and to greatly increase the reaction speed in the preparation process , and it is convenient to control the reaction process and obtain coating products with stable performance and good consistency;

Method used

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  • Preparation method of epoxy-modified insulated thermal-conductive high-temperature resistant organosilicon coating and its products
  • Preparation method of epoxy-modified insulated thermal-conductive high-temperature resistant organosilicon coating and its products
  • Preparation method of epoxy-modified insulated thermal-conductive high-temperature resistant organosilicon coating and its products

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Experimental program
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Embodiment 1

[0033] Embodiment 1: the preparation method of a kind of epoxy-modified organic silicon insulating heat-conducting high temperature resistant coating provided by the present invention, it comprises the following steps:

[0034] (1) Preparation of raw materials: Prepare the following raw materials (Kg) according to the following components and weight ratios:

[0035]

[0036] (2) Synthesis of organosilicon prepolymer: Add organosilicon monomer and xylene solvent of equal mass into the reactor, heat to 60-70°C, adjust the pH value to 4-5 with 30% hydrochloric acid, and slowly Add distilled water and react for 2 to 4 hours; after the reaction mixture is allowed to stand for stratification, take the upper layer solution and wash it with water until it is neutral, and distill it under reduced pressure until the solid content rate is 50 to 70% to obtain a silicone prepolymer solution;

[0037] (3) Synthesis of epoxy-modified silicone resin: Mix the silicone prepolymer solution wi...

Embodiment 2

[0051] Embodiment 2: A preparation method and product of an epoxy-modified silicone insulating, heat-conducting, and high-temperature-resistant coating provided by the embodiment of the present invention are basically the same as in Embodiment 1, except that:

[0052] (1) Preparation of raw materials (Kg)

[0053]

[0054]

[0055] (2) Synthesis of organosilicon prepolymer: Methyltrichlorosilane, dimethyldichlorosilane, phenyltriethoxysilane, dimethyldiethylsilane with a mass ratio of 4:3:9:5 Mix 15kg of oxysilane monomer, add 15kg of xylene solvent with equal mass into the reactor, heat to 65°C, adjust the pH to 4-5 with 30% hydrochloric acid, slowly add 75% of the fully hydrolyzed distilled water under stirring conditions , reacted for 3 hours, the reaction mixture was allowed to stand for stratification, the upper layer solution was washed with water until neutral, and distilled under reduced pressure to a solid content rate of 65% to obtain a silicone prepolymer solu...

Embodiment 3

[0064] Embodiment 3: A preparation method and product of an epoxy-modified silicone insulating heat-conducting and high-temperature-resistant coating provided by the embodiment of the present invention are basically the same as Embodiments 1 and 2, except that:

[0065] (1) Preparation of raw materials (Kg)

[0066]

[0067]

[0068] (2) Synthesis of organosilicon prepolymer: Methyltrichlorosilane, dimethyldichlorosilane, phenyltriethoxysilane, dimethyldiethylsilane with a mass ratio of 3:4:8:6 Mix 5 kg of oxysilane monomers, add an equal mass of xylene solvent into the reactor, heat to 60°C, adjust the pH to 4-5 with 30% hydrochloric acid, slowly add 90% of the fully hydrolyzed distilled water under stirring conditions, After reacting for 2 hours, the reaction mixture was left to stand and separated into layers, the upper layer was washed with water until neutral, and distilled under reduced pressure until the solid content rate was 50% to obtain a silicone prepolymer s...

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Abstract

The invention provides a preparation method of an epoxy-modified insulated thermal-conductive high-temperature resistant organosilicon coating, comprising the following steps: preparing raw materials; synthesizing an organosilicon pre-polymer; synthesizing an epoxy-modified organosilicon resin; and preparing the epoxy-modified insulated thermal-conductive high-temperature resistant organosilicon coating. The invention also provided the epoxy-modified insulated thermal-conductive high-temperature resistant organosilicon coating prepared by the method. The coating is composed by the epoxy modified organosilicon resin, fillers, a coupling agent and solvents. The coating prepared by the method in the invention takes account of insulation, thermal-conductivity, and high-temperature resistance at the same time, has coating adhesion of first level, hardness of 5H, a breakdown voltage of 1800V / 0.5mA, 2 seconds, a heat transfer coefficient of larger than 100W / (m<2>.K), and no obviously changed coating at a temperature of 250 DEG C for 24 hours, therefore the coating can be widely used in various industrial equipment and household appliances.

Description

technical field [0001] The invention relates to a chemical coating, in particular to a preparation method and a product of an epoxy-modified organosilicon insulating, heat-conducting, and high-temperature-resistant coating. Background technique [0002] With the rapid development of social economy and the improvement of people's living standards, industrial equipment and civilian electrical appliances have also put forward higher requirements for the coatings used. In many industrial occasions, equipment is required to be able to conduct heat and resist heat, such as heat exchangers; many electrical appliances in the home, such as induction cookers, electric water heaters, etc. Printed coatings have broad industrial and social prospects. [0003] At present, there are few screen printing coatings in the society that can simultaneously insulate, heat, conduct, and withstand high temperatures. People usually only pay attention to the performance of coatings in terms of high t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/06C09D7/12C09D5/25C08G77/38
Inventor 马志平王小妹王瑞宏杨林学
Owner DONGGUAN HONGDA POLYUREFHANE RESIN
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