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Surface treatment liquid for coated steel plate, preparation method and use method

A technology of surface treatment liquid and coated steel plate, which is applied in the direction of surface coating liquid device, pretreatment surface, coating, etc., can solve the problems of poor bonding performance of zinc-aluminum-magnesium coated steel plate, etc.

Active Publication Date: 2022-04-12
SHOUGANG CORPORATION +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of this application is to provide a surface treatment solution, preparation method and use method for coated steel plates, and to solve the technology for poor bonding performance of zinc-aluminum-magnesium coated steel plates question

Method used

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  • Surface treatment liquid for coated steel plate, preparation method and use method
  • Surface treatment liquid for coated steel plate, preparation method and use method
  • Surface treatment liquid for coated steel plate, preparation method and use method

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preparation example Construction

[0054] According to another typical embodiment of the present invention, a method for preparing any one of the above-mentioned surface treatment liquids for coated steel sheets is provided, comprising the following steps:

[0055] S0, preparing active side group polysiloxane.

[0056] Specifically, the preparation method of the active side group polysiloxane comprises the following steps:

[0057] Mix and heat polymethylhydrogensiloxane, alcohols, allyl compounds containing amine or epoxy groups and catalysts in an inert atmosphere (such as nitrogen atmosphere) to obtain the active side-group polysiloxane.

[0058] Wherein: the polymethylhydrogensiloxane is linear, the number average relative molecular mass of the polymethylhydrogensiloxane is 600-6000; the side group of the polymethylhydrogensiloxane contains silicon hydrogen Functional group and silicon methyl group, the mass molar concentration of described silicon hydrogen functional group is 1.5-1.6mol / 100g;

[0059] Th...

Embodiment 1

[0085] The present embodiment provides a kind of surface treatment liquid that is used for coated steel plate, and its preparation method comprises the following steps:

[0086] S0, preparing active side group polysiloxane.

[0087]10g polymethylhydrogen siloxane, 4.6g dehydrated alcohol, 4g allyl glycidyl ether with a mass molar concentration of 1.55mol / 100g of silicon hydrogen functional group were fully mixed (i.e. silicon hydrogen functional group, ethanol, allyl shrink The molar ratio of glycerol ether is 1:0.65:0.22), add 0.01g of Castel catalyst in an inert atmosphere, fully stir at 50°C for 6h, and filter to obtain a clear liquid that is the active side group polysiloxane.

[0088] S1. Mix the active side-group polysiloxane with the water-alcohol mixed solution to obtain a preformed solution.

[0089] Take 0.4 parts of the active side-group polysiloxane prepared in step S0, and add it dropwise to 100 parts of water-alcohol mixture (the mass ratio of water and ethanol ...

Embodiment 2

[0095] The present embodiment provides a kind of surface treatment liquid that is used for coated steel plate, and its preparation method comprises the following steps:

[0096] S0, preparing active side group polysiloxane.

[0097] The mass molar concentration of 10g silicon hydrogen functional group is 1.55mol / 100g polymethylhydrogen siloxane, 3.6g methanol, 2g allylamine are fully mixed (the molar ratio of silicon hydrogen functional group, methyl alcohol, allylamine is 1:0.73: 0.23), add 0.1 g of chloroplatinic acid in an inert atmosphere, and fully stir at room temperature for 8 h to obtain active side-group polysiloxane.

[0098] S1. Mix the active side-group polysiloxane with the water-alcohol mixed solution to obtain a preformed solution.

[0099] Take 0.07 parts of the active side-group polysiloxane prepared in step S0, and add it dropwise to 100 parts of water-alcohol mixture (the mass ratio of water and methanol is 1:1) at a rate of 10-100 drops / min. A stirring sp...

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Abstract

The invention particularly relates to a surface treatment liquid for a coated steel plate, a preparation method and a use method, and belongs to the technical field of surface treatment.The surface treatment liquid is prepared from, by weight, 0.05-0.5 part of active side group polysiloxane, 0.2-2 parts of film adhesion accelerant, 0-1 part of acid-base regulator and 100 parts of water-alcohol mixed liquor, and the mass ratio of water to alcohol in the water-alcohol mixed liquor is 1: (0.5-2). The treating fluid is coated on the surface of a zinc-aluminum-magnesium coated steel plate to form an organic / inorganic composite film, so that the cementing performance of the zinc-aluminum-magnesium coated steel plate is effectively improved. The preparation method is simple in process, low in cost, safe, environmentally friendly and outstanding in effect, and the prepared treating fluid can effectively improve the cementing performance of the surface of the zinc-aluminum-magnesium coated steel plate.

Description

technical field [0001] The invention belongs to the technical field of surface treatment, in particular to a surface treatment solution for coated steel plates, a preparation method and a use method. Background technique [0002] Compared with traditional galvanized steel sheets, zinc-aluminum-magnesium-coated steel sheets have better properties such as corrosion resistance, wear resistance, weather resistance, weldability, and self-healing properties. At present, hot-dip plating and other technologies can be used for large-scale industrialization Production, mainly used in various fields such as solar photovoltaic industry, equipment manufacturing industry, home appliance manufacturing, high-speed rail, large-scale substations and automobile manufacturing. It has a wide range of uses and broad prospects. [0003] However, the prominent problem of zinc-aluminum-magnesium-coated steel sheets compared with galvanized steel sheets is poor bonding performance, which restricts th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D183/06C09D183/08C09D7/61B05D7/14B05D7/24B05D3/04
Inventor 刘永壮黎敏邵蓉彭丽赵晓非蒋光锐李学涛张永强曹建平白亚楠王飞赵明明
Owner SHOUGANG CORPORATION