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Potassium silicate solution for coating electron beam tube fluorescent screen

A potassium silicate solution, electron beam tube technology, applied in the direction of alkali metal silicate coatings, coatings, fireproof coatings, etc., can solve the problems of long drying time, affecting the transparency of the coating solution, yellowing, etc. Curing time, shortening curing time, effect of large specific surface area

Inactive Publication Date: 2020-12-04
江苏康祥实业集团有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because of its special structure, organic silicon coating liquid has excellent performance in many aspects. It is not only suitable for fluorescent screens such as electron beam tubes and fluorescent digital tubes, but also suitable for integrated circuits and large-scale integrated circuits. However, the existing potassium silicate aqueous solution is used in When coating fluorescent screen products such as electron beam tubes and fluorescent digital tubes, there is a long drying time, and yellowing occurs due to the use of organic amine catalysts, which affects the transparency of the coating liquid. Therefore, a method for electron beam tube fluorescent screens is proposed. Potassium silicate solution for coating

Method used

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  • Potassium silicate solution for coating electron beam tube fluorescent screen
  • Potassium silicate solution for coating electron beam tube fluorescent screen

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] First prepare modified silica:

[0017] Mix 10 parts of white carbon black with 2 parts of hexamethyldisilazane, 2 parts of dimethyldiethoxysilane and 10 parts of deionized water, and stir for 2 hours at a temperature of 160 ° C to prepare modified white carbon black.

[0018] Then prepare the potassium silicate solution used for electron beam tube fluorescent screen coating:

[0019] Step 1: Mix 26 parts of potassium silicate aqueous solution with a concentration of 15%-20% and 4 parts of modified white carbon black, and add 3 parts of polysiloxane during the mixing process;

[0020] Step 2: Add 10 parts of aromatic solvent to the mixture prepared in Step 1, and add 3 parts of propyltriacetoxysilane at a temperature of 60°C;

[0021] Step 3: Stir the mixture prepared in step 2 continuously. During the stirring process, as the viscosity of the mixture increases continuously, deionized water is dropped into the mixture to make the mixture in a fluid adhesion state suit...

Embodiment 2

[0023] First prepare modified silica:

[0024] Mix 10 parts of white carbon black with 2 parts of hexamethyldisilazane, 2 parts of dimethyldiethoxysilane and 10 parts of deionized water, and stir for 2 hours at a temperature of 160 ° C to prepare modified white carbon black.

[0025] Then prepare the potassium silicate solution used for electron beam tube fluorescent screen coating:

[0026] Step 1: Mix 27 parts of potassium silicate aqueous solution with a concentration of 15%-20% and 5 parts of modified white carbon black, and add 4 parts of polysiloxane during the mixing process;

[0027] Step 2: Add 11 parts of aromatic hydrocarbon solvent to the mixture prepared in Step 1, and add 4 parts of propyltriacetoxysilane at a temperature of 65°C;

[0028] Step 3: Stir the mixture prepared in step 2 continuously. During the stirring process, as the viscosity of the mixture increases continuously, deionized water is dropped into the mixture to make the mixture in a fluid adhesio...

Embodiment 3

[0030] First prepare modified silica:

[0031] Mix 10 parts of white carbon black with 2 parts of hexamethyldisilazane, 2 parts of dimethyldiethoxysilane and 10 parts of deionized water, and stir for 2 hours at a temperature of 160 ° C to prepare modified white carbon black.

[0032] Then prepare the potassium silicate solution used for electron beam tube fluorescent screen coating:

[0033] Step 1: Mix 28 parts of potassium silicate aqueous solution with a concentration of 15%-20% and 6 parts of modified white carbon black, and add 4.5 parts of polysiloxane during the mixing process;

[0034] Step 2: Add 12 parts of aromatic hydrocarbon solvent to the mixture prepared in Step 1, and add 4.5 parts of propyltriacetoxysilane at a temperature of 70°C;

[0035] Step 3: Stir the mixture prepared in step 2 continuously. During the stirring process, as the viscosity of the mixture increases continuously, deionized water is dropped into the mixture to make the mixture in a fluid adh...

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Abstract

The invention discloses the technical field of potassium silicate solutions, and particularly relates to a potassium silicate solution for coating an electron beam tube fluorescent screen; hexamethyldisilazane and dimethyldiethoxysilane are used for modifying white carbon black, so that the viscosity of the white carbon black is reduced, and the white carbon black has better mixing dispersity witha base material potassium silicate aqueous solution; the modified white carbon black can be uniformly distributed in the potassium silicate solution; meanwhile, the modified white carbon black has alarge specific surface area, and the modified white carbon black and the potassium silicate aqueous solution are mixed to increase the mechanical properties of the whole coating liquid system, so thatthe dry surface of the coating liquid has good wear resistance; by limiting the use amount of propyltriacetoxysilane, the curing time of the coating liquid system is effectively shortened, the excessive volatilization phenomenon exists due to the excessive use amount of propyltriacetoxysilane, and the curing time is prolonged, so that the proper use amount of propyltriacetoxysilane is limited, and the curing time of the coating liquid system is effectively shortened.

Description

technical field [0001] The invention relates to the technical field of potassium silicate solution, in particular to the potassium silicate solution used for coating electron beam tube fluorescent screens. Background technique [0002] Potassium silicate aqueous solution (commonly known as water slope glass) is a binder for coating electron beam tubes, fluorescent digital tubes and other fluorescent screens by precipitation method. At present, high-tech fields such as electronic components, power circuit modules, and large-scale integrated circuit boards have further achieved high performance, high reliability, and miniaturization, and the working environment is more harsh, requiring coating materials to have excellent high and low temperature resistance, mechanical properties Performance, insulation and thermal conductivity, thermal matching performance and electrical performance, etc., in order to meet the special requirements of power circuits for coating materials. Beca...

Claims

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Application Information

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IPC IPC(8): C09D1/04C09D5/18C09D7/62C09D7/65C09D7/63
CPCC09D1/04C09D5/18C09D7/62C09D7/63C09D7/65C09D7/70
Inventor 朱雪松季成平刘仕通孙明于海洋
Owner 江苏康祥实业集团有限公司
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