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A kind of transparent nano silicon dioxide-epoxy resin anticorrosion coating and preparation method thereof

A technology of nano-silica and epoxy resin, applied in the field of coatings, can solve the problems of large differences in surface molecular structure, agglomeration of fillers in anti-corrosion coatings, poor interface compatibility, etc., and achieve good transparency and corrosion resistance. Good, the effect of ensuring storage stability

Active Publication Date: 2019-08-16
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a kind of transparent nano-silica-epoxy resin anticorrosion coating and preparation method thereof, choose to graft epoxy resin on nano-silica, solve the problem of inorganic nano-silica filler in organic epoxy The problem of poor interface compatibility caused by the large difference in surface molecular structure in the resin avoids the disadvantages of filler agglomeration, precipitation, and precipitation in anti-corrosion coatings

Method used

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  • A kind of transparent nano silicon dioxide-epoxy resin anticorrosion coating and preparation method thereof
  • A kind of transparent nano silicon dioxide-epoxy resin anticorrosion coating and preparation method thereof
  • A kind of transparent nano silicon dioxide-epoxy resin anticorrosion coating and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0036] A reflux condenser is installed on a clean, airtight, heat-resistant container with a stirring device, and the components should be tightly connected to ensure the airtightness of the device. Add 100 grams of epoxy equivalents of 160 to 180 (g.mol -1 ) bisphenol F type epoxy resin, 1 gram of γ-aminopropyl trimethoxysilane, 1000 grams of acetone, turn on stirring and be warming up to acetone backflow, react under the condition of acetone backflow and stop reaction after 12 hours to obtain grafted epoxy resin Silane of the resin, after cooling to room temperature, add 300 grams of silica with a particle size of 70 nanometers, after ultrasonic treatment for 20 minutes, start stirring and heat up to maintain acetone reflux, react under the condition of acetone reflux for 6 hours, stop the reaction, cool After reaching room temperature, repeatedly washing with acetone, and centrifuging or filtering to remove unreacted silane of grafted epoxy resin, to obtain nano-silica fill...

Embodiment 2

[0039] Add 100 grams of epoxy equivalent 165-185 (g.mol -1 ) of bisphenol F-type epoxy resin, 100 grams of N-(2-aminoethyl)-3 aminopropyl methyl methoxy silane, 100 grams of xylene, open stirring and react at room temperature for 20 hours, continue to heat up to 110 After 4 hours of reaction at °C, the reaction was stopped to obtain silane grafted with epoxy resin. After cooling to room temperature, 1 gram of silica with a particle size of 30 nanometers was added. After ultrasonic treatment for 20 minutes, the stirring was turned on and the reaction was carried out at room temperature for 1 hour, and continued. The reaction was stopped after heating at 120° C. for 23 hours, and after cooling to room temperature, repeated washing with xylene, and centrifugation or filtration to remove unreacted silane of grafted epoxy resin to obtain nano-silica filler of grafted epoxy resin.

[0040] 0.01 gram of nano-silica filler grafted with epoxy resin, 100 grams of epoxy equivalent of 185...

Embodiment 3

[0042] Add 100 grams of epoxy equivalent 200-220 (g.mol -1 ) of aliphatic epoxy resin, 10 grams of bis(3-triethoxysilylpropyl) amine, 450 grams of toluene, open stirring and be warmed up to 55 ° C for 2 hours, continue to be warmed up to 110 ° C and react for 2 hours, after Stop the reaction to obtain the silane of the grafted epoxy resin, after cooling to room temperature, add 20 grams of silica with a particle size of 20 nanometers, start stirring and heat up at 60 ° C and react for 24 hours to stop the reaction, after cooling to room temperature, repeat with toluene Washing, centrifuging or filtering to remove unreacted epoxy resin grafted silane to obtain epoxy resin grafted nano silica filler.

[0043] 5 grams of nano-silica filler grafted epoxy resin, 100 grams of epoxy equivalent 455 ~ 556 (g.mol -1 ) of bisphenol F type epoxy resin, 0.5g defoamer, 0.5g leveling agent, 0.1g anti-skinning agent, 0.3g matting agent, 0.2g light stabilizer, 250g xylene, 50g isopropanol Pu...

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Abstract

The invention belongs to the technical field of paint, and particularly relates to a transparent nano silicon dioxide-epoxy resin anticorrosive paint and a preparation method thereof. Firstly, the dispersion size of the nano silicon dioxide in the coating is much smaller than the wavelength of visible light; and therefore, the coating formed by applying and curing the paint has favorable transparency, and people can clearly observe the shape, size, color and other properties of the object under the coating through the coating. Secondly, the epoxy-resin-grafted nano silicon dioxide filler can be sufficiently dissolved and wetted by the paint resin easily; especially, the particle size of the epoxy-resin-grafted silicon dioxide is nano-sized, so the epoxy-resin-grafted silicon dioxide has huge specific area and surface nano effect and can form firm interface binding force with the resin in the coating, thereby greatly eliminating the defects and pores in the anticorrosive coating, inhibiting the anticorrosive coating from embrittlement-caused cracking, underfilm corrosion and the like, and further obviously enhancing the corrosion-resistant effect and service life of the anticorrosive coating.

Description

technical field [0001] The invention belongs to the technical field of coatings, in particular to a transparent nano-silica-epoxy resin anti-corrosion coating and a preparation method thereof. Background technique [0002] A large number of anti-corrosion projects and scientific experiments at home and abroad have proved that epoxy resin-based coatings have excellent anti-corrosion properties and are the main variety of anti-corrosion coatings, and their output accounts for more than half of anti-corrosion coatings. Many metal components need to be coated with transparent and corrosion-resistant coatings. On the basis of satisfying the anti-corrosion performance, the shape, size, color and other index parameters of the components under the coating can be clearly observed. Unfilled epoxy varnishes are clear but have poor corrosion resistance. The corrosion resistance of epoxy coatings after adding fillers is good. However, the size of fillers in active epoxy coatings is usua...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09D187/00C09D163/00C09D5/08C08G83/00
CPCC08K3/36C08K9/04C08K9/06C08K2201/011C09D5/08C09D7/62C09D7/67C09D163/00
Inventor 吴航王福会朱圣龙
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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