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Preparation technology of shield layer for inner side of distribution box

A preparation process and technology for distribution boxes, applied in coatings, epoxy resin coatings, etc., can solve the problems of easy damage, surface layer vulnerable to external force impact, insulation effect reduction, etc., to achieve not easy to fall off, lower temperature, and ensure insulation effect of effect

Inactive Publication Date: 2016-12-21
SICHUAN XINGZHI ZHIHUI INTPROP OPERATION CO LTD
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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 to solve the problem in the prior art that the surface layer arranged on the casing of the distribution box is easily impacted by external force, and is easily damaged when impacted, thereby greatly reducing the insulation effect. Using the preparation process of the protective layer, coating the prepared protective layer on the inside of the distribution box can effectively solve the above problems

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation process of the protective layer for the inner side of the distribution box includes:

[0028] Step 1, heating methyl vinyl silicone rubber, ethylene vinyl acetate, and cycloaliphatic epoxy resin to a molten state, and stirring evenly to obtain a molten mixture;

[0029] Step 2. Keep the molten mixed liquid in a molten state, add fumed silica, aluminum oxide, and benzoyl oxide into the mixed liquid, and stir at 500-600 r / min for more than 1 hour;

[0030] Step 3. After the stirring is completed, adjust the stirring speed to 1000-1200r / min, and sequentially add tetrahydrofuran, m-xylylenediamine, polybutanone oximinosilane, and hydrogen-containing silicone oil; Add the latter substance; when the addition of the substance is completed, adjust the stirring speed to 500-600r / min, and the stirring time is 10-15min to make a coating liquid;

[0031] Step 4. Apply the coating solution to the inner surface of the distribution box shell with a coating thickness o...

Embodiment 2

[0037] The difference between this embodiment and embodiment 1 is that the content of each component in this embodiment is different, and the specific components are set as follows:

[0038] 115 parts by weight of methyl vinyl silicone rubber; 25 parts by weight of ethylene vinyl acetate; 12 parts by weight of cycloaliphatic epoxy resin; 16 parts by weight of m-xylylenediamine; 16 parts by weight of fumed silica; 5 parts by weight of tetrahydrofuran; 0.9 parts by weight of aluminum oxide; 0.6 parts by weight of benzoyl peroxide; 2.6 parts by weight of polybutanoximinosilane; 1.8 parts by weight of hydrogen-containing silicone oil.

[0039] In this embodiment, the bonding strength between the coating liquid and the housing of the distribution box is 109 MPa. The temperature resistance of the finished product in this embodiment reaches above 120°C. In the present embodiment, the conductivity of the cured coating solution is 6.1×10 15 Ω·m.

Embodiment 3

[0041] The difference between this embodiment and embodiment 1 is that the content of each component in this embodiment is different, and the specific components are set as follows:

[0042] 105 parts by weight of methyl vinyl silicone rubber; 20 parts by weight of ethylene vinyl acetate; 23 parts by weight of cycloaliphatic epoxy resin; 22 parts by weight of m-xylylenediamine; 15 parts by weight of fumed silica; 4 parts by weight of tetrahydrofuran; 0.3 parts by weight of aluminum oxide; 0.8 parts by weight of benzoyl peroxide; 2.2 parts by weight of polybutanoximinosilane; 2.5 parts by weight of hydrogen-containing silicone oil.

[0043] In this embodiment, the bonding strength between the coating liquid and the housing of the distribution box is 138Mpa. The temperature resistance of the finished product in this embodiment reaches above 120°C. In the present embodiment, the conductivity of the cured coating solution is 7.5×10 15 Ω·m.

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PUM

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Abstract

The invention discloses a preparation technology of a shield layer for the inner side of a distribution box. The preparation technology disclosed by the invention comprises the following steps of step I, heating methylvinyl silicone rubber, ethyl vinyl acetate and alicyclic epoxy resin to a molten state, and performing uniform stirring so as to obtain molten mixed liquor; step II, maintaining the molten state of the molten mixed liquor, adding gas phase white carbon black, aluminum oxide and benzoyl peroxide into the mixed liquor, and performing stirring under the condition of 500-600r / min, wherein the stirring time is more than 1h; step III, after stirring, adjusting the stirring speed to 1000-1200r / min, sequentially adding tetrahydrofuran, m-xylylenediamine, polybutanone oxime silane and hydrogen-containing silicone oil, in the step III, when a former substance is uniformly stirred, adding a later substance, after the substances are added, adjusting the stirring speed to 500-600r / min, adjusting the stirring time to 10-15min, and making coating liquor; and step IV, coating the coating liquor to the surface of the inner side of a shell of the distribution box, and performing curing so as to obtain finished products. The finished products made by the preparation technology disclosed by the invention have the advantages of being good in insulation properties, excellent in bonding properties, good in heat dispersion and the like.

Description

technical field [0001] The invention relates to a preparation process of a protective layer, in particular to a preparation process of a protective layer used inside a distribution box. Background technique [0002] The power distribution cabinet is a kind of electrical equipment. The main function of the power distribution cabinet is to open and close, control and protect electrical equipment during the process of power generation, transmission, distribution and power conversion in the power system. The components in the power distribution cabinet are mainly composed of circuit breakers, isolating switches, load switches, operating mechanisms, transformers and various protection devices. There are many classification methods for power distribution cabinets. For example, according to the installation method of circuit breakers, it can be divided into removable power distribution cabinets and fixed power distribution cabinets; or according to different cabinet structures, it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/07C09D123/08C09D163/00C09D7/12C09D5/25
Inventor 谭逢林
Owner SICHUAN XINGZHI ZHIHUI INTPROP OPERATION CO LTD