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Room temperature cured transparent inorganic water-resistant coating and preparation method thereof

A room temperature curing and transparent technology, applied in the direction of alkali metal silicate coatings, coatings, etc., can solve the problems of reduced usage rate, environmental hazards, high VOC emissions, etc., and achieve cost reduction, strong adhesion, and high wear resistance Effect

Inactive Publication Date: 2019-04-26
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As the global environment becomes more and more severe, people gradually start to use some environmentally friendly products. Although coating adhesives are not a large class of huge chemical products, the harm to the environment cannot be ignored. Traditional organic coating adhesives are due to their VOC High emissions and harmful to the human body The use rate has gradually decreased in recent years. Inorganic coatings have good water solubility and are non-toxic, so they will not cause harm to the environment like organic coatings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Weigh 4 g of tetramethylammonium hydroxide and add it to an 80 ml beaker, then add 14 g of deionized water, stir evenly, add 2 g of fumed silica, and stir magnetically for 20-30 minutes to obtain the silica dispersion , Stir the dispersion in an oil bath at a constant temperature of 135°C for 2-2.5 hours to obtain the A component, mix lithium silicate and potassium silicate in a molar ratio of 1:7, and slowly add 5%wtKH-560 dropwise , the stirring time is 2-3h to obtain the B component, the A component and the B component are fully mixed, and then 1%wt ammonium dihydrogen phosphate is added dropwise and stirred for about 30min to obtain the transparent inorganic water-resistant coating.

[0029] The obtained inorganic water-resistant coating is sprayed on the workpiece by spraying, and it can be cured at room temperature for about 30 minutes to form a flat and colorless coating with good adhesion, and the thickness of the coating is 15-30 μm.

Embodiment 2

[0031] Weigh 4 g of tetramethylammonium hydroxide and add it to an 80 ml beaker, then add 14 g of deionized water, stir evenly, add 2 g of fumed silica, and stir magnetically for 20-30 minutes to obtain the silica dispersion , Stir the dispersion in an oil bath at a constant temperature of 135°C for 2-2.5 hours to obtain the A component, mix lithium silicate and potassium silicate in a molar ratio of 1:5, and slowly add 5%%wtKH- 560, the stirring time is 2-3h to obtain the B component, fully mix the A component and the B component, add 1%wt ammonium dihydrogen phosphate dropwise and stir for about 30min to obtain the transparent inorganic water-resistant coating.

[0032] The obtained inorganic water-resistant coating is sprayed on the workpiece by spraying, and it can be cured at room temperature for about 30 minutes to form a flat and colorless coating with good adhesion, and the thickness of the coating is 15-30 μm.

Embodiment 3

[0034] Weigh 4 g of tetramethylammonium hydroxide and add it to an 80 ml beaker, then add 14 g of deionized water, stir evenly, add 2 g of fumed silica, and stir magnetically for 20-30 minutes to obtain the silica dispersion , Stir the dispersion in an oil bath at a constant temperature of 135°C for 2-2.5 hours to obtain the A component, mix lithium silicate and potassium silicate in a molar ratio of 1:7, and slowly add 5%wtKH-560 dropwise , the stirring time is 2-3h to obtain the B component, the A component and the B component are fully mixed, and then 1.5% wt of ammonium dihydrogen phosphate is added dropwise and stirred for about 30 minutes to obtain the transparent inorganic water-resistant coating.

[0035] The obtained inorganic water-resistant coating is sprayed on the workpiece by spraying, and it can be cured at room temperature for about 30 minutes to form a flat and colorless coating with good adhesion, and the thickness of the coating is 15-30 μm.

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Abstract

The invention discloses a room temperature cured transparent inorganic water-resistant coating and a preparation method thereof. The room temperature cured transparent inorganic water-resistant coating comprises a component A and a component B, wherein the component A comprises the following raw materials in parts by weight: 10-15 parts of fumed silica, 20-25 parts of tetramethylammonium hydroxideand 60-70 parts of deionized water; and the component B comprises the following raw materials in parts by weight: 7-10 parts of lithium silicate, 75-85 parts of potassium silicate, 5-10 parts of KH-560 and 1-1.5 parts of ammonium dihydrogen phosphate. The room temperature cured transparent inorganic water-resistant coating provided by the invention solves problems of serious volatile pollution ofa traditional organic coating and relatively weak water resistance of an inorganic coating, has relatively good water resistance, can be cured at room temperature, is environmentally-friendly and pollution-free; and a cured coating film is strong in adhesion to workpiece, high in hardness, low in shrinkage rate, and excellent in weather resistance and fire retardancy.

Description

technical field [0001] The invention belongs to the technical field of coatings, and in particular relates to a room-temperature curing transparent inorganic water-resistant coating and a preparation method thereof. Background technique [0002] As the global environment becomes more and more severe, people gradually start to use some environmentally friendly products. Although coating adhesives are not a large class of huge chemical products, the harm to the environment cannot be ignored. Traditional organic coating adhesives are due to their VOC High emissions and harmful to the human body, the usage rate has gradually decreased in recent years. Inorganic coatings have good water solubility and are non-toxic, so they will not cause harm to the environment like organic coatings. [0003] Inorganic coatings are low-cost, non-toxic, non-flammable and environmentally friendly products, which are well in line with the development concept of today's coatings and adhesives indust...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D1/04C09D7/61C09D7/63C09D7/20
CPCC09D1/04C09D7/20C09D7/61C09D7/63
Inventor 沈玉华张超谢安建
Owner ANHUI UNIVERSITY
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