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High-corrosion-resistance, high-weather-resistance and excellent-hydrophobicity chromium-free fingerprint-resistant coating used for galvanized steel sheet

A galvanized steel sheet, anti-fingerprint technology, used in anti-corrosion coatings, polyurea/polyurethane coatings, coatings, etc., can solve problems such as harsh use environments

Inactive Publication Date: 2015-03-11
上海华谊精细化工有限公司技术中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for galvanized steel sheets used outdoors, the use environment is even harsher, and they have to withstand the test of various harsh environments. Ordinary chrome-free anti-fingerprint coatings cannot meet the requirements of outdoor use.

Method used

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  • High-corrosion-resistance, high-weather-resistance and excellent-hydrophobicity chromium-free fingerprint-resistant coating used for galvanized steel sheet
  • High-corrosion-resistance, high-weather-resistance and excellent-hydrophobicity chromium-free fingerprint-resistant coating used for galvanized steel sheet
  • High-corrosion-resistance, high-weather-resistance and excellent-hydrophobicity chromium-free fingerprint-resistant coating used for galvanized steel sheet

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Experimental program
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Effect test

Embodiment Construction

[0048] The following examples and comparative examples of the present invention are given to illustrate the present invention in detail, but the present invention is not limited thereto.

[0049] (1) Test sample

[0050] 1. Types of test samples

[0051] a. Hot-dip galvanized test sample (GI): plate thickness 0.5mm, galvanized layer weight 40 / 40g / m 2 .

[0052] b. Galvalume test sample (GL): plate thickness 0.5mm, galvanized layer weight 70 / 70g / m 2 .

[0053] c. Electrogalvanized test sample (EG): plate thickness 0.8mm, galvanized layer weight 20 / 20g / m 2 .

[0054] 2. Cleaning of galvanized panels

[0055] First use methyl ethyl ketone (chemical reagent) to wipe the surface of the substrate to remove all oil stains, then immerse the substrate in alcohol (chemical reagent) for ultrasonic cleaning for 10 minutes, and dry it for use.

[0056] (2) Preparation of matrix resin A

[0057] 1. Preparation of waterborne polyurethane resin (A1)

[0058] Under the protection of d...

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Abstract

The invention relates to a high-corrosion-resistance, high-weather-resistance and excellent-hydrophobicity chromium-free fingerprint resistant coating used for a galvanized steel sheet. The water solution of the chromium-free fingerprint resistant coating consists of the following components: (A) at least two or more than two water-based resins accounting for 30-80wt% of the total solid content; (B) at least one water-based cross-linking agent accounting for 1-10wt% of the total solid content; (C) at least one organic silane coupling agent accounting for 5-40wt% of the total solid content; (D) at least one vanadium-containing compound accounting for 0.1-2wt% of the total solid content; (E) a compound of at least one element in titanium and zirconium accounting for 0.1-5wt% of the total solid content; (F) at least one organic wax compound accounting for 0.5-10wt% of the total solid content; (G) at least one organic silicon modified collosol accounting for 1-30wt% of the total solid content; (H) at least one functional hydrophobic agent accounting for 0.05-0.5wt% of the total solid content. The galvanized steel sheet on which the chromium-free fingerprint resistant coating is coated can completely meet the requirement of outdoor use.

Description

technical field [0001] The invention relates to a chromium-free anti-fingerprint coating for galvanized steel sheets, in particular to a chromium-free anti-fingerprint coating for galvanized steel sheets with high corrosion resistance, high weather resistance and excellent hydrophobicity. The anti-fingerprint coating can form a layer of hydrophobic coating film on the surface of galvanized steel sheet. The coating film can not only endow the surface of galvanized steel sheet with excellent corrosion resistance and weather resistance, but also form good acid resistance, alkali resistance and blackening resistance. and processability. Background technique [0002] Galvanized steel sheets are widely used in construction materials, household appliances, auto parts and other industries. With the growing growth of these industries, the demand for fingerprint-resistant steel is also rising. [0003] In order to prevent galvanized steel sheets from being oxidized and corroded by ox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D175/04C09D175/06C09D133/00C09D133/14C09D7/12C09D5/08
CPCC09D151/08C08L2205/03C08L2205/035C08L2207/062C09D5/08C09D7/62C09D7/63C09D7/65C09D7/69C08L75/06C08L23/06C08K9/06C08K3/36C08L27/18C08L91/06
Inventor 党常华丁奋吴文希顾圣杰闵茸
Owner 上海华谊精细化工有限公司技术中心
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