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Preparation method of epoxy-resin-grafted glass scale filling material

A technology of glass flakes and epoxy resin, applied in fibrous fillers, anti-corrosion coatings, dyed polymer organic compounds and other directions, can solve the problem that glass flakes are easy to aggregate into groups, the efficiency of anti-corrosion coatings is reduced, and the interface compatibility is not good. and other problems, to achieve the effect of increasing salt spray resistance time, improving impact resistance and reducing curing shrinkage.

Active Publication Date: 2013-12-04
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

[0005] However, the surface energy difference between inorganic glass flakes and organic coating resins in anti-corrosion coatings is very large, so the interfacial compatibility between the two is not good, causing mutual non-infiltration, and glass flakes are easy to aggregate into groups, which is difficult in organic resin media. Uniform dispersion, resulting in a large number of defects and voids in the coating formed by curing the coating, resulting in problems such as brittle cracking and under-film corrosion in the coating, resulting in a decrease in the efficiency and shortened life of the anti-corrosion coating

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Add 100 grams of anhydrous glass flakes with a thickness of 2??m and a diameter of 3 mm into a dry flask filled with 2000 ml of anhydrous toluene, add 0.1 g of dibutyltin dilaurate as a catalyst, and stir at room temperature for 30 minutes at high speed. Suspension A was obtained by ultrasonic treatment for 20 minutes. Dissolve 30 grams of toluene diisocyanate (TDI) in 500 ml of anhydrous toluene, move it to a constant pressure dropping funnel under nitrogen protection, and drop it into suspension A at a rate of 60 drops / min. 25 ° C and high-speed stirring conditions. After dropping, the temperature was raised to 90°C for 6 hours, and then filtered in a dry environment and washed repeatedly with anhydrous toluene to remove the reacted TDI to obtain TDI-modified glass flakes. The above-mentioned TDI-modified glass flakes were added to a reactor containing 80 grams of epoxy resin E44 dewatered in advance and 1000 ml of anhydrous toluene, reacted at 60°C for 2 hours, and ...

Embodiment 2

[0029] Add 100 grams of anhydrous glass flakes with a thickness of 5??m and a diameter of 0.2 mm into a dry flask filled with 1000 ml of anhydrous acetone, add 0.05 g of triethylenediamine as a catalyst, and stir at room temperature for 30 minutes at high speed. Suspension A was obtained by wave treatment for 20 minutes. Dissolve 90 grams of diphenylmethane diisocyanate (MDI) in 800 milliliters of anhydrous acetone, move it to a constant pressure dropping funnel under nitrogen protection, and drop it into the suspension A at a rate of 10 drops / min. The dropwise addition was carried out at 0°C and high-speed stirring. After dropping, heat up to acetone reflux and continue to react for 5 hours, filter in a dry environment and wash repeatedly with anhydrous acetone to remove unreacted MDI and obtain MDI-modified glass flakes. The above-mentioned MDI-modified glass flakes were added into a reactor containing 200 grams of epoxy resin E21 and 1000 milliliters of anhydrous acetone b...

Embodiment 3

[0032]Add 100 grams of anhydrous glass flakes with a thickness of 4??m and a diameter of 1mm into a dry flask containing 800 milliliters of anhydrous acetone, add 0.08 grams of stannous octoate as a catalyst, stir at room temperature for 30 minutes at high speed, and use ultrasonic waves for 20 minutes. Minutes to obtain suspension A. Dissolve 60 grams of hexamethylene diisocyanate (HDI) in 500 milliliters of anhydrous acetone, move it to a constant pressure dropping funnel under nitrogen protection, and drop it into the suspension A at a speed of 30 drops / min. The dropwise addition was carried out at 25°C and high-speed stirring. After dropping, heat up to acetone reflux and continue to react for 6 hours, filter in a dry environment and wash repeatedly with anhydrous acetone to remove unreacted HDI and obtain HDI-modified glass flakes. The above-mentioned HDI modified glass flakes were added to a reactor containing 200 grams of pre-dewatered epoxy resin E12 and 600 millilite...

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Abstract

The invention relates to a preparation method of an epoxy-resin-grafted glass scale filling material. The material is characterized in that the epoxy-resin-grafted glass scale filling material is prepared from raw materials of, by mass: 100 parts of glass scales, 0.5-90 parts of a bridging agent, 5-200 parts of epoxy resin, 0.0001-0.1 parts of a catalyst, and 100-10000 parts of a solvent. The preparation method of the epoxy-resin-grafted glass scale filling material comprises the steps that: first, preparation works are carried out, wherein the glass scales are subject to a drying treatment, epoxy resin is subject to a dewatering treatment, and the solvent is dewatered; polyisocyanate-modified glass scales are prepared; and then the epoxy-resin-grafted glass scale filling material is prepared. With the method provided by the invention, a problem of poor interfacial compatibility between anticorrosive resin paint and the glass scale filling material is solved, such that the corrosion resisting effect and the service life of an anticorrosive coating are substantially improved.

Description

technical field [0001] The invention relates to the technical field of coatings, and in particular provides a preparation method of glass flake filler grafted with epoxy resin. Background technique [0002] A large number of anti-corrosion projects and scientific experiments at home and abroad have proved that glass flake fillers can effectively improve the penetration resistance and corrosion resistance of anti-corrosion coatings. Since 1957, Owens-Corning Fiberglass Corporation of the United States published the first glass flake coating manufacturing patent. Since then, the research, development, and application of this technology have developed rapidly, and have been widely used in coastal engineering equipment, offshore oil drilling platforms, cross-sea bridges, ship decks, oil fields and refinery oil pipelines, and large river gates that require long-term protection. on large-scale engineering facilities. [0003] Usually, the glass flakes selected for anti-corrosion ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/00C09C3/10C09D7/12C09D5/08
Inventor 吴航朱圣龙李瑛王福会
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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