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Solvent-free nanometer modified epoxy weather-resistant type anticorrosive paint and preparation method thereof

A nano-modified, anti-corrosion coating technology, applied in the field of coatings, can solve problems such as reduction and loss of gloss, and achieve the effects of simple process, large film thickness, good application prospects and economic benefits

Active Publication Date: 2012-11-28
宿迁益创智能科技有限公司
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  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to prepare a kind of nano-epoxy composite paint with strong weather resistance and excellent other performances for this defect of epoxy coating weather resistance ;Nano TiO2 is non-toxic, has good chemical stability and thermal stability, and is a white pigment with good performance. It has strong light scattering, high tinting power, large hiding power and good whiteness. However, long-term exposure to sunlight and air will cause loss of light, discoloration, and pulverization in a short period of time; the present invention applies silicon-coated nano-titanium dioxide particles to the modification of epoxy anti-corrosion coatings; first, nano-titanium dioxide has a large surface area and is easy to agglomerate , and silicon-coated nano-titanium dioxide, because the surface of nano-titanium dioxide has a film coated with silicon dioxide, the surface energy of nano-titanium dioxide is reduced to improve its dispersion; secondly, nano-SiO2 has hardness High, friction resistance, corrosion resistance, acid resistance and many other excellent properties can greatly improve the performance of the coating, especially the weather resistance; in addition, the unique specific surface, pore size and pore volume of nano-SiO2 Such structural properties are not only conducive to the photoactivity of nano-TiO2, but also ensure the effective isolation of nano-TiO2 particles from the coating matrix, enhancing the weather resistance and dust resistance of the product. Therefore, the epoxy anti-corrosion coating modified with silicon-coated nano-titanium dioxide can more effectively increase the weather resistance and other properties of the epoxy coating

Method used

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  • Solvent-free nanometer modified epoxy weather-resistant type anticorrosive paint and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Preparation of silicon-coated nano-titanium dioxide in component A

[0038] a Disperse 5 g of nano-titanium dioxide in 100 g of deionized water, add 0.05 g of dispersant NaOH, adjust the pH value of the solution to 10, add 0.12 g of PVP to the solution, and ultrasonically oscillate for 30 minutes to fully disperse the nano-titanium dioxide in the aqueous solution;

[0039] b In the slurry obtained in step a, slowly add a mass fraction of 1% sodium silicate aqueous solution to SiO 2 The content is 3% of the mass of nano-titanium dioxide, adjust the pH value of the solution to 9, keep the temperature at 80°C, and stir at a low speed for 2 hours;

[0040] c The solution obtained in step b was aged at 60°C for 2h, then dried, and calcined at 800°C for 2h to obtain silicon-coated nano-titanium dioxide.

[0041] (2) Preparation of solvent-free nano-modified epoxy weather-resistant anti-corrosion coating

[0042] A weighs 3g of silicon-coated nano-titanium dioxide disper...

example 2

[0050] (1) Preparation of silicon-coated nano-titanium dioxide in component A

[0051] a Weigh 5g of nano-titanium dioxide and disperse it in 100ml of deionized water, add 0.1g of dispersant sodium silicate, adjust the pH value of the solution to 10, add 0.12g of PVP to the solution, and oscillate ultrasonically for 30min to fully disperse;

[0052] b In the slurry obtained in step a, slowly add a mass fraction of 1% sodium silicate aqueous solution to SiO 2 The content is 1% of the mass of nano-titanium dioxide, adjust the pH value of the solution to 9, keep the temperature at 80°C, and stir at a low speed for 2 hours;

[0053] c. Aging the solution obtained in step b at 60° C. for 2 hours, then drying, and calcining at 800° C. for 2 hours to obtain silicon-coated nano-titanium dioxide.

[0054] (2) Preparation of solvent-free nano-modified epoxy weather-resistant anti-corrosion coating

[0055] A weighs 3g of silicon-coated nano-titanium dioxide dispersed in 100ml ethanol ...

example 3

[0063] (1) Preparation of silicon-coated nano-titanium dioxide in component A

[0064] a Weigh 5g of nano-titanium dioxide and disperse it in 100ml of deionized water, add 0.1g of dispersant metasodium hexaphosphate, adjust the pH value of the solution to 10, add 0.12g of PVP to the solution, and ultrasonically oscillate for 30 minutes to make it fully dispersed;

[0065] b In the slurry obtained in step a, slowly add a mass fraction of 1% sodium silicate aqueous solution to SiO 2 The content is 1% of the mass of nano-titanium dioxide, adjust the pH value of the solution to 9, keep the temperature at 80°C, and stir at a low speed for 2 hours;

[0066] c. Aging the solution obtained in step b at 60° C. for 2 hours, then drying, and calcining at 800° C. for 2 hours to obtain silicon-coated nano-titanium dioxide.

[0067] (2) Preparation of solvent-free nano-modified epoxy weather-resistant anti-corrosion coating

[0068] A weighs 3g of silicon-coated nano-titanium dioxide disp...

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Abstract

The invention relates to the technical field of paints, in particular to a solvent-free nanometer modified epoxy weather-resistant type anticorrosive paint and a preparation method thereof. Based on the relation of a similar compatible principle, a molecular structure and application, silicon-cladding nanometer titanium dioxide grains are processed by using a silane coupling agent KH-560 with an epoxy group, so that the epoxy group is arranged on the surface of a compound grain; and mutual acting force between interfaces formed by the grains and a polymer is enhanced by enabling epoxy base to participate in polymerization reaction and excellent mutual action of epoxy group and epoxy resin, so that the interface has ideal adhering capability; and therefore, the dispersion performance of the nanometer grain in the resin is improved, and the weather-resistant performance of the compound paint is improved.

Description

technical field [0001] The invention relates to the technical field of coatings, in particular to a solvent-free nano-modified epoxy weather-resistant anti-corrosion coating and a preparation method thereof. Background technique [0002] Corrosion of metal materials is a serious problem facing the world. Corrosion not only consumes precious wealth, but also destroys normal life and production order. Corrosion and environmental pollution have attracted more and more attention. The use of anti-corrosion coatings to protect metals is the most important The most effective and economical method; with the increasing urgency and strictness of people's environmental protection, the development of solvent-free coatings, that is, no volatile organic compounds (VOC) or no harmful air pollutants (HAP) has become a must for the coatings industry. new direction of research. [0003] Each layer of solvent-free coating can be coated with a thick film, which significantly improves the effic...

Claims

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Application Information

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IPC IPC(8): C09D163/02C09D7/12C09D5/08
Inventor 宋仁国姜冬王超李鑫伟
Owner 宿迁益创智能科技有限公司
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