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Hydroxyl-containing bridged polysilsesquioxane/SiO2 effective anti-corrosion coating and preparation method thereof

A polysilsesquioxane, hydroxyl bridge technology, applied in anti-corrosion coatings, coatings and other directions, can solve the problems of large specific surface area of ​​nanoparticles, reduced anti-corrosion performance of coatings, easy to agglomerate, etc., to achieve good dispersion, Enhance anti-corrosion performance, improve dispersibility and compatibility

Active Publication Date: 2021-05-28
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the large specific surface area and high surface activity of nanoparticles, they are prone to agglomeration and produce a large number of particle accumulation pores. Dispersing them in the silicone coating will greatly reduce the anti-corrosion performance of the coating.

Method used

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  • Hydroxyl-containing bridged polysilsesquioxane/SiO2 effective anti-corrosion coating and preparation method thereof
  • Hydroxyl-containing bridged polysilsesquioxane/SiO2 effective anti-corrosion coating and preparation method thereof
  • Hydroxyl-containing bridged polysilsesquioxane/SiO2 effective anti-corrosion coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Purify glycidoxypropyltriethoxysilane and N-[3-(triethoxysilyl)propyl]ethylenediamine by distillation. Add 3A molecular sieves to ethanol and shake for 1 hour, then distill to obtain absolute ethanol. Add glycidoxypropyltriethoxysilane, N-[3-(triethoxysilyl)propyl]ethylenediamine and ethanol in proportion to the reagent bottle with lid in turn, glycidoxypropyl The molar ratio of triethoxysilane to N-[3-(triethoxysilyl)propyl]ethylenediamine is 1:1, the volume ratio of the two silanes to ethanol is 1:0.5, stir evenly, and fill the bottle with Inert gas, transfer the reagent bottle to an oven, heat up to 60°C, and for 96 hours, the ring-opening reaction of epoxy and amino groups will fully occur to obtain a hydroxyl bridged silane ethanol solution;

[0031] Use distillation method to purify ethyl orthosilicate, add solvent ethanol, ammonia water in proportion to the reagent bottle with cover in turn, the volume ratio of ethyl orthosilicate, ethanol and ammonia water is 1...

Embodiment 2

[0036]Purify glycidoxypropyltriethoxysilane and N-[3-(triethoxysilyl)propyl]ethylenediamine by distillation. Add 3A molecular sieves to ethanol and shake for 1 hour, then distill to obtain absolute ethanol. Add glycidoxypropyltriethoxysilane, N-[3-(triethoxysilyl)propyl]ethylenediamine and ethanol in proportion to the reagent bottle with lid in turn, glycidoxypropyl The molar ratio of triethoxysilane to N-[3-(triethoxysilyl)propyl]ethylenediamine is 3:1, the volume ratio of the two silanes to ethanol is 1:0.5, stir evenly, and fill the bottle with Inert gas, transfer the reagent bottle to an oven, heat up to 60°C, and for 96 hours, the ring-opening reaction of epoxy and amino groups will fully occur to obtain a hydroxyl bridged silane ethanol solution;

[0037] Use distillation method to purify ethyl orthosilicate, add solvent ethanol, ammonia water in proportion to the reagent bottle with lid sequentially, the volume ratio of ethyl orthosilicate, ethanol and ammonia water is...

Embodiment 3

[0042] Purify glycidoxypropyltriethoxysilane and N-[3-(triethoxysilyl)propyl]ethylenediamine by distillation. Add 3A molecular sieves to ethanol and shake for 1 hour, then distill to obtain absolute ethanol. Add glycidoxypropyltriethoxysilane, N-[3-(triethoxysilyl)propyl]ethylenediamine and ethanol in proportion to the reagent bottle with lid in turn, glycidoxypropyl The molar ratio of triethoxysilane to N-[3-(triethoxysilyl)propyl]ethylenediamine is 3:1, the volume ratio of the two silanes to ethanol is 1:0.5, stir evenly, and fill the bottle with Inert gas, transfer the reagent bottle to an oven, heat up to 60°C, and for 96 hours, the ring-opening reaction of epoxy and amino groups will fully occur to obtain a hydroxyl bridged silane ethanol solution;

[0043] Use distillation method to purify ethyl orthosilicate, add solvent ethanol, ammonia water in proportion to the reagent bottle with lid sequentially, the volume ratio of ethyl orthosilicate, ethanol and ammonia water i...

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Abstract

The invention relates to a hydroxyl-containing bridged polysilsesquioxane / SiO2 effective anti-corrosion coating and a preparation method thereof, and the hydroxyl-containing bridged polysilsesquioxane / SiO2 effective anti-corrosion coating comprises the following raw materials and components: a hydroxyl-containing bridged silane ethanol solution, a hydroxyl-containing bridged silane modified SiO2 sol, water and a catalyst in a mass ratio of 1:(0.05-0.5):(0.03-0.5):(0.001-0.02). A proper amount of hydroxyl-containing bridging silane is selected to modify nano SiO2 particles, then the modified nano SiO2 particles are mixed with the hydroxyl-containing bridging silane, a composite sol system is formed through hydrolysis-polycondensation, and a metal substrate is coated with the composite sol system to obtain the hydroxyl-containing bridging polysilsesquioxane / SiO2 nano effective anti-corrosion protective coating. The anti-corrosion protection performance of the coating material is enhanced.

Description

technical field [0001] The invention relates to the technical field of organosilicon anticorrosion coatings, in particular to a hydroxyl-containing bridged polysilsesquioxane / SiO 2 Effective anti-corrosion coating and method for its preparation. Background technique [0002] Silicone materials have excellent electrical insulation, radiation resistance, flame retardancy, high and low temperature resistance, biological inertness and chemical inertness, and have important applications in the field of metal corrosion protection. The protective effect of a single silicone coating is not good, and its function is single. Adding composite nanoparticles can greatly improve the anti-corrosion performance, mechanical strength and adhesion performance of the coating. Such coatings usually consist of two types of nanoparticles with different particle sizes: the smaller particle size organopolysilsesquioxane nanoparticles and the larger particle size SiO 2 Nanoparticles. The organic p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/04C09D5/08
CPCC09D183/04C09D5/08C08K2201/011C08K9/06C08K3/36
Inventor 张策刘艳琳张光华张万斌杨晓梅
Owner SHAANXI UNIV OF SCI & TECH