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Method for preparing silane coupled agent of preforming film before painting dressing metals

A technology of silane coupling agent and group silane coupling agent, which is applied in the field of metal coating pretreatment process, can solve the problems of difficult product quality assurance, unstable production process, and no large-scale implementation, so as to achieve low cost and improve anti-corrosion Ability, combined effect

Active Publication Date: 2007-07-25
ZHEJIANG WUYUAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the unstable production process, the product quality is difficult to guarantee, and there is still a large amount of waste liquid discharge, so there is no large-scale implementation

Method used

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  • Method for preparing silane coupled agent of preforming film before painting dressing metals

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Experimental program
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Effect test

Embodiment 1

[0014] A kind of preparation method of silane coupling pre-film agent before metal coating, in the container that injects 100 parts of deionized water, stirring speed is 2000 revolutions per minute, successively add first strengthening agent, stabilizing agent, second strengthening agent, Silane coupling agent, dispersant, wherein the first strengthening agent adopts nano-silica, the addition is 1% of the weight of deionized water, the stabilizing agent is selected ethanol, and the addition is 26% of the weight of deionized water, the second strengthening agent Adopt epoxy resin emulsion, add-on is 1% of deionized water weight, the silane coupling agent mixed by functional group silane coupling agent and non-functional group silane coupling agent, its weight ratio is 1: 1, add-on is 2.6% of the weight of deionized water, the dispersant adopts nonylphenol polyoxyethylene ether NP, and the addition amount is 1% of the weight of deionized water; the pH value is adjusted to 6 with ...

Embodiment 2

[0016] A kind of preparation method of silane coupling pre-film agent before metal coating, in the container that injects 100 parts of deionized water, stirring speed is 2200 revolutions per minute, successively add first strengthening agent, stabilizing agent, second strengthening agent, Silane coupling agent, dispersant, wherein the first strengthening agent adopts nano silicon dioxide, the addition amount is 6.5% of the weight of deionized water, the stabilizing agent propanol, the addition amount is 1% of the weight of deionized water, the second strengthening agent Adopt epoxy resin emulsion, add-on is 6.5% of deionized water weight, the silane coupling agent mixed by functional group silane coupling agent and non-functional group silane coupling agent, its weight ratio is 1: 3, add-on is 0.13% of the weight of deionized water, the dispersant is nonylphenol polyoxyethylene ether NP, and the addition amount is 1.3% of the weight of deionized water; the pH value is adjusted ...

Embodiment 3

[0018] A kind of preparation method of silane coupling pre-film agent before metal coating, in the container that injects 100 parts of deionized water, stirring speed is 2100 revolutions per minute, successively add first strengthening agent, stabilizing agent, second strengthening agent, Silane coupling agent, dispersant, wherein the first strengthening agent adopts nano silicon dioxide, the addition is 3.5% of the deionized water weight, the stabilizing agent is selected isopropanol, and the addition is 13% of the deionized water weight, the second The reinforcing agent adopts epoxy resin emulsion, and the addition amount is 3.5% of the weight of deionized water, and the silane coupling agent mixed by functional group silane coupling agent and non-functional group silane coupling agent, its weight ratio is 1: 2, add The amount is 1.3% of the weight of deionized water, and the dispersant adopts nonylphenol polyoxyethylene ether NP, and the addition amount is 1.2% of the weight...

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Abstract

This invention discloses a method for preparing silane coupling-prefilming agent before metal coating. The method comprises: adding deionized water 100 parts into a container, stirring at a speed of 2000-2200 rpm, and adding a first reinforcer, stabilizer, a second reinforcer, silane coupling agent and dispersing agent to obtain silane coupling-prefilming agent before metal coating. The ultrathin organic film thus formed can be used to replace traditional phosphating film, and the weight in unit area is only 5% of phosphating film, thus has a low cost. The Si-O-Me covalent bonding is strong, thus the product is stable, and has improved corrosion resistance. The silane coupling-prefilming agent is easy to apply, and the preparation process only needs to control the pH value and the electrical conductivity. The environmental pollution is little. The prefilming treatment does not need to modify the previous apparatus.

Description

technical field [0001] The invention relates to a metal coating pretreatment process, in particular to a preparation method of a silane coupling pre-film agent before metal coating. Background technique [0002] The Chinese national standard GB / T 6807-2001 "Technical Conditions for Phosphating Treatment of Iron and Steel Workpieces Before Painting" pointed out that the purpose of phosphating treatment before painting is to use the phosphating film formed after the treatment as the bottom layer of the coating to strengthen the coating film. Adhesion and corrosion resistance to the steel substrate improve the coating quality of steel workpieces. The phosphating agent is composed of phosphoric acid, heavy metal ion oxidant, etc. During the phosphating process, the total acidity, free acidity, and oxidant concentration of the treatment agent need to be strictly controlled. Along with the reaction product gas and residue, environmental protection and treatment are required. It c...

Claims

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Application Information

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IPC IPC(8): C23C22/48
CPCC23C2222/20
Inventor 王一建陆国建支波沈泉飞托马斯·尼尔
Owner ZHEJIANG WUYUAN TECH CO LTD
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