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Preparation method of environmental protection corrosion resistant paint

A corrosion-resistant and environmentally friendly technology, applied in the direction of anti-corrosion coatings, coatings, etc., can solve problems such as non-compliance with environmental protection requirements, thick coating thickness, complex coating composition, etc.

Inactive Publication Date: 2007-02-14
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Patent CN1116223 describes the method of preparing rust-removing and anti-rust paint with polyvinyl formal resin or polyvinyl butyral resin as the main raw material. The paint has good bonding force with metal, long anti-rust life, fast drying and convenient use , low cost, coating film can withstand high temperature of 180 ℃, etc., but the composition of the coating is complex, and the coating thickness is thicker to have a better anti-corrosion effect. The coating has color, which is not suitable for the requirements of colorless transparent coating materials; patent CN1186095 provides A method of paint made of polyvinyl butyral, rosin phenolic resin, oxalic acid, phosphoric acid, and a mixed solvent mainly composed of xylene, zinc phosphate, water, and ethanol has been developed. It has dual functions of rust removal and antirust, and also has oil resistance. , alkali, salt water corrosion, wide applicable temperature range, long service life, etc., but the paint uses xylene as a mixed solvent, which is highly toxic and does not meet environmental protection requirements; patent CN1228800 provides zinc powder and ethanol, ethyl silicate , polyvinyl butyral, water and ethyl silicate of orthophosphoric acid to prepare the anticorrosion composition and its basic component adhesive, the anticorrosion performance of the composition, the stability of the adhesive, the stability of the newly prepared composition The stability has been greatly improved. The corrosion resistance of the composition obtained by this method to metal is mainly provided by zinc powder. Due to the limitation of the particle size of zinc powder, the thickness of the coating is relatively thick, and it is difficult to be suitable for very thin coatings. Require

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: 15g of polyvinyl butyral was added into 260ml of ethanol and stirred until completely dissolved. Add 40ml of butanol and stir until the solution is evenly mixed. Continue to add 0.3ml KH550 to the solution and stir until it is evenly mixed. Add 1g of benbenzimidazole to the solution, stir until completely dissolved, and brush the solution directly on a copper plate or steel that has been polished with fine sandpaper, washed with acetone and dried, and dried at room temperature for 3 hours to obtain a thickness of 3 to 5 microns. coating. The coating hardness is 2H, the adhesion is grade 1, and the salt spray test can reach 100 hours.

Embodiment 2

[0015] Example 2: 20 g of polyvinyl butyral was added into 260 ml of ethanol, and stirred until completely dissolved. Add 30ml of butanol and stir until the solution is evenly mixed. Continue to add 0.3ml KH550 to the solution and stir until it is evenly mixed. To this solution was added 3 g of benzotriazole and stirred until completely dissolved. Brush or spray the obtained solution on a red copper plate or steel that has been polished with fine sandpaper, washed with acetone and dried, and dried at room temperature for 2 hours to obtain a coating with a thickness of 5-8 microns. The coating hardness is 2H, the adhesion is grade 1, and the salt spray test can reach 200 hours.

Embodiment 3

[0016] Example 3: 15g of polyvinyl butyral was added into 260ml of ethanol and stirred until completely dissolved. Add 30ml of butanol and stir until the solution is evenly mixed. Add 0.3ml KH550 and 3g benzotriazole to the solution, stir until completely dissolved. Continue to add 3 g of ground powdered sodium molybdate, and stir until evenly dispersed. The obtained solution is brush-coated on a red copper plate or steel that has been polished with fine sandpaper, washed with acetone and dried, and dried at room temperature for 2 hours to obtain a coating with a thickness of 3-5 microns. The coating hardness is 2H, the adhesion is grade 1, and the salt spray test can reach 200 hours.

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Abstract

The invention is a method for preparing environmental-protection, corrosion-resistant coatings, belonging to environmental-protection coating technical field, comprising the process steps of: blending and dissolving poly(vinyl butyral) in alcohol, and adding in assistant by 1-20 wt% of poly(vinyl butyral); taking corrosion inhibitor by 0.5-5wt% of poly(vinyl butyral) and adding the corrosion inhibitor in the solution, blending and fully dissolving; blending and adding inorganic salts in the prepared solution by 1-5wt% of poly(vinyl butyral) and blending for 30-60min; mechanically blending and obtaining various coatings, ranging from colorless and transparent to colored. And the coatings belong to environmental protection coatings, able to be used in anticorrosive protection of surfaces of copper, Al-Mg alloy, steel plate, and other metals, and especially applied to anticorrosive protection of metal surfaces on the condition of requiring the coat to be very thin.

Description

technical field [0001] The invention belongs to the technical field of environment-friendly materials, and in particular provides a method for preparing an environment-friendly corrosion-resistant and wear-resistant coating. Background technique [0002] The protection and anti-corrosion of metal materials is an important topic to improve the service life of metal and maintain the performance of metal materials. The important method is to apply organic coatings on the surface of metal. The anti-corrosion protection of metal materials mainly requires the material to have good corrosion resistance and mechanical properties in various environments. At present, most of the metal anti-corrosion materials commonly used contain benzene series such as benzene, toluene, chloroform, etc., which cause great harm to the environment and human body during construction and use. As people pay more and more attention to the environment and health, it is necessary to develop new environmenta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D129/14C09D5/08
Inventor 王金伟陈磊
Owner UNIV OF SCI & TECH BEIJING
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