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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Problems solved by technology

Due to the unstable production process, the product quality is difficult to guarantee, and the

Method used

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

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Example Embodiment

[0013] Example 1:

[0014] A method for preparing silane coupling pre-filming agent before metal coating. In a container filled with 100 parts of deionized water, the stirring speed is 2000 revolutions per minute, and the first reinforcing agent, stabilizer, and second reinforcing agent are added successively. Silane coupling agent, dispersant, where the first reinforcing agent is nano silica, the addition amount is 1% by weight of deionized water, the stabilizer is ethanol, the addition amount is 26% by weight of deionized water, and the second reinforcing agent Using epoxy resin emulsion, the addition amount is 1% of the weight of deionized water, and the silane coupling agent is a mixture of functional group silane coupling agent and non-functional group silane coupling agent. The weight ratio is 1:1, and the addition amount is 2.6% of the weight of deionized water, nonylphenol polyoxyethylene ether NP is used as the dispersant, and the addition amount is 1% of the weight of de...

Example Embodiment

[0015] Example 2:

[0016] A method for preparing silane coupling pre-filming agent before metal coating. In a container filled with 100 parts of deionized water, the stirring speed is 2200 revolutions per minute, and the first reinforcing agent, stabilizer, and second reinforcing agent are added successively. Silane coupling agent, dispersant, the first reinforcing agent is nano silica, the addition amount is 6.5% by weight of deionized water, the stabilizer propanol, the addition amount is 1% by weight of deionized water, the second reinforcing agent Using epoxy resin emulsion, the addition amount is 6.5% of the weight of deionized water, and the silane coupling agent is a mixture of functional group silane coupling agent and non-functional group silane coupling agent. The weight ratio is 1:3, and the addition amount is 0.13% by weight of deionized water, nonylphenol polyoxyethylene ether NP is used as the dispersant, and the added amount is 1.3% by weight of deionized water; th...

Example Embodiment

[0017] Example 3:

[0018] A method for preparing silane coupling pre-filming agent before metal coating. In a container filled with 100 parts of deionized water, the stirring speed is 2100 revolutions per minute, and the first reinforcing agent, stabilizer, and second reinforcing agent are added successively. Silane coupling agent, dispersant, where the first reinforcing agent is nano silica, the addition amount is 3.5% by weight of deionized water, the stabilizer is isopropanol, the addition amount is 13% by weight of deionized water, and the second The reinforcing agent adopts epoxy resin emulsion, and the adding amount is 3.5% of the weight of deionized water. The silane coupling agent is a mixture of functional group silane coupling agent and non-functional group silane coupling agent. The weight ratio is 1:2. The amount is 1.3% of the weight of deionized water, the dispersant is nonylphenol polyoxyethylene ether NP, and the amount of addition is 1.2% of the weight of deioniz...

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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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