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Weather-resistant rust-proof water paint and preparing method thereof

A water-based coating and weather-resistant technology, applied in anti-corrosion coatings, polyester coatings, epoxy resin coatings, etc., can solve problems such as damage to the performance of anti-rust coatings, and achieve the effects of improving weather resistance, reducing oxidation, and simple operation.

Inactive Publication Date: 2009-11-04
SOUTH CHINA UNIV OF TECH +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In Japanese Patent JP6-41472A, as a water-dilutable zinc-rich antirust paint, the metal zinc powder is mixed with the paint base aqueous solution, and the solution is mainly composed of organosilane resin obtained by the reaction of organofunctional silane and organic resin, organosilicon However, when the paint film of this antirust paint is damaged, or when the paint base solution is weakly acidic or weakly alkaline, the metal zinc powder reacts with the water in the paint base solution to generate hydrogen gas, Traces of hydrogen bubbles will remain in the formed paint film, impairing the performance of the anti-rust paint

Method used

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  • Weather-resistant rust-proof water paint and preparing method thereof
  • Weather-resistant rust-proof water paint and preparing method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1 (mechanical method preparation):

[0028] Selection of equipment and materials: The high-energy stirring mill is a German-made Dresses superflow-12 mill, and the grinding medium is yttrium oxide-toughened zirconia balls with a particle size of 0.5 mm. The titanium dioxide can be anatase type, more preferably a mixture of rutile type and anatase type, and the proportion of anatase type titanium dioxide powder is preferably 40%-70%.

[0029] Process: First, measure 50 parts by mass of water according to the concentration of the prepared slurry and put it into a dispersion container, and then add 50 parts by mass of titanium dioxide that has been weighed. After dispersing with a disperser for about 10 minutes, turn on the superflow-12 mill, transport the slurry to the mill through a gear peristaltic pump, and circulate the slurry in the stirring mill for grinding. During the whole grinding process, the mixer was kept on, and the polyacrylic acid sodium salt d...

Embodiment 2

[0030] Embodiment 2 (alkali dissolution method):

[0031] Dissolve 10 parts by mass of titanium tetrachloride with 40 parts by mass of ice water to prepare a titanium tetrachloride solution with a certain concentration. Titrate this solution with ammonia water, and control the titration rate to about 100ml for 2 hours. During the titration process, a white precipitate is first formed, and then the precipitate disappears and then turns into a blue transparent sol. When the precipitate completely disappears, the titration process ends. Then add silicon dioxide precursor orthosilicate ethyl ester to the sol, the addition amount is converted into SiO 2 with TiO 2 The mass ratio is 2%. Stir to complete the encapsulation reaction, and obtain titanium dioxide colloids encapsulated by silica.

Embodiment 3

[0032] Embodiment 3 (acid-soluble method):

[0033]Take 20 parts by mass of titanium sulfate crystals, add them into 30 parts by mass of deionized water, stir and dissolve, and prepare a titanium sulfate solution. The excess sodium hydroxide solution with a mass fraction of 10% is added to the titanium sulfate solution to form a white precipitate of titanium hydroxide. Wash the precipitate with deionized water, filter, and peptize the precipitate with 5% hydrochloric acid solution to obtain a transparent sol. Then add silicon dioxide precursor orthosilicate ethyl ester to the sol, the addition amount is converted into SiO 2 with TiO 2 The mass ratio is 2%. Stir to complete the encapsulation reaction, and obtain titanium dioxide colloids encapsulated by silica.

[0034] The preparation embodiment of weather-resistant rust-proof water-based paint:

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Abstract

The invention discloses a weather-resistant and rust-proof water-based paint and a preparation method thereof. The coating includes 10-40 parts of deionized water, 30-70 parts of water-dilutable resin emulsion, 1-10 parts of titanium dioxide particles and an appropriate amount of coating additives. The average particle size of titanium dioxide particles is less than one micron, and the surface is coated with inorganic matter dioxide silicon. During preparation, deionized water, water-dilutable resin emulsion, titanium dioxide particles and paint additives are uniformly dispersed according to the mass parts in the formula. The coating uses titanium oxide particles wrapped by surface inorganic substances, which weakens the photodecomposition function of titanium oxide on the organic components in the paint film, so that a wider range of film-forming resins can be selected, and the coating film has strong UV resistance; The invention uses a mechanical method to prepare nano-titanium oxide, which has the advantages of simple operation and low cost.

Description

technical field [0001] The invention relates to a water-based paint, in particular to a water-based paint with excellent weather resistance and anti-corrosion performance and a preparation method thereof. Background technique [0002] The weather resistance of the coating refers to the resistance of the coating film to fading, discoloration, cracking, chalking, The ability of a series of aging phenomena such as peeling and adhesion loss. Among them, ultraviolet radiation is the key factor to promote the aging of the coating film. The short-wavelength ultraviolet rays in sunlight have a lot of energy. The binder molecules in the paint absorb ultraviolet light and are activated, and combine with oxygen molecules to form peroxides, which undergo a chain reaction and degrade the resin. At present, the method of improving weather resistance of water-based coatings is mainly to use fluorocarbon emulsion or silicone modified resin emulsion with better weather resistance, but the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D163/10C09D167/06C09D183/07C09D5/08C09D5/02
Inventor 王燕民范玉涛谢平波黄靖耿纪中李新衡潘志东
Owner SOUTH CHINA UNIV OF TECH
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