Preparation method of temporary antirust liquid for color-coated sheet

A technology of anti-rust liquid and color-coated plate, applied in coating, anti-corrosion coating, petroleum industry and other directions, can solve the problems of unusable, poor film flexibility, easy cracking in plate processing, etc., to achieve the effect of expanding the scope of use

Active Publication Date: 2021-04-30
武汉迪赛新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the existing anti-rust liquid is simply mixed with the primer, the stability of the mixed solution will be poor, and the mixed solution will appear particles or even gel, making it unusable; and the commonly used primers are oil-soluble organic resins, such as Epoxy resin, polyurethane, etc., are difficult to dissolve in water-based anti-rust liquid. Even if water-based resin is used as a primer, it is easy to dissolve in anti-rust liquid. sex
[0004] In the CN106283005A patent application, a water-based anti-rust liquid that is easy to bond with paint is disclosed. Adhesive, but due to the poor flexibility of the film layer, the plate after coating is easy to crack during processing
[0005] In the CN110408312A patent application, a temporary anti-rust liquid and its preparation method are disclosed. The anti-rust agent has good corrosion resistance and adhesion. However, water-based sol is used as the adhesive in the anti-rust liquid. The water-based sol is very easy to wash off with water and cannot be used as a primer
[0006] In the CN106191842A patent application, a water-based antirust liquid with good adhesion to the paint is disclosed. In this invention, acrylic acid emulsion is used as the organic film-forming material. Primer use

Method used

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  • Preparation method of temporary antirust liquid for color-coated sheet
  • Preparation method of temporary antirust liquid for color-coated sheet
  • Preparation method of temporary antirust liquid for color-coated sheet

Examples

Experimental program
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Embodiment 1

[0034] Embodiment 1 A kind of preparation method of temporary antirust liquid for prepainted plate

[0035] Every mass part is 100g in the present embodiment;

[0036] The first step: the preparation method of water-based silicone emulsion is as follows:

[0037] Step 1. Take 20 parts by mass of γ-(2,3-glycidoxy)propyltrimethoxysilane, 2 parts by mass of dodecyltrimethoxysilane and 10 parts by mass of γ-aminopropyltrimethoxysilane , mixed and stirred evenly to obtain a mixture;

[0038] Step 2. Take 80 parts by mass of deionized water and 12 parts by mass of phosphoric acid with a mass concentration of 85% and add them to the reactor, raise the temperature to 55°C, and drop all the mixture obtained in step 1 into the reactor while stirring, and the dropping time is 2h , after the dropwise addition was completed, the insulation reaction was carried out for 2 hours to obtain 124 parts by mass of water-based silicone emulsion;

[0039] Step 2: Preparation of temporary anti-rust ...

Embodiment 2

[0041] Embodiment 2 A kind of preparation method of temporary antirust liquid for prepainted board

[0042] Every mass part is 500g in the present embodiment;

[0043] The first step: the preparation method of water-based silicone emulsion is as follows:

[0044] Step 1. Take 20 parts by mass of γ-(2,3-epoxypropoxy)propyltrimethoxysilane, 3 parts by mass of octadecyltrimethoxysilane and 15 parts by mass of γ-aminopropyltriethoxysilane parts, mix and stir evenly to obtain a mixture;

[0045] Step 2. Take 80 parts by mass of deionized water and 3.8 parts by mass of nitric acid with a mass concentration of 68% and add them to the reactor, raise the temperature to 50°C, and drop all the mixture obtained in step 1 into the reactor while stirring, and the dropping time is 2h , after the dropwise addition was completed, the insulation reaction was carried out for 2 hours to obtain 128 parts by mass of water-based silicone emulsion;

[0046] Step 2: Preparation of temporary anti-ru...

Embodiment 3

[0048] Embodiment 3 A kind of preparation method of temporary anti-rust liquid for prepainted board

[0049] Every mass part is 1kg in the present embodiment;

[0050] The first step: the preparation method of water-based silicone emulsion is as follows:

[0051] Step 1. Take 35 parts by mass of γ-(2,3-epoxypropoxy)propyltriethoxysilane, 4 parts by mass of n-hexyltriethoxysilane and N-β(aminoethyl)-γ-ammonia 10 parts by mass of propyltriethoxysilane, mixed and stirred evenly to obtain a mixture;

[0052] Step 2. Take 70 parts by mass of deionized water and 2.5 parts by mass of nitric acid with a mass concentration of 68% and add them to the reactor, raise the temperature to 60°C, and drop all the mixture obtained in step 1 into the reactor while stirring, and the dropping time is 3h , after the dropwise addition was completed, the insulation reaction was carried out for 2 hours to obtain 131 parts by mass of water-based silicone emulsion;

[0053] Step 2: Preparation of tem...

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Abstract

The invention relates to the field of color-coated sheets, and particularly discloses a preparation method of temporary antirust liquid for a color-coated sheet. The temporary antirust liquid is prepared from the following raw materials in parts by mass: 30-60 parts of water-based organic silicon emulsion, 0.5-5 part of cerium salt, 5-30 parts of silicate, 0.5-5 part of benzoate, 0.5-4 part of ethylene diamine tetraacetic acid salt and 30-70 parts of deionized water, wherein the water-based organic silicon emulsion is obtained by crosslinking three types of silane coupling agents containing epoxy groups, long-chain alkyl groups and amino groups. The temporary antirust liquid provided by the invention has corrosion resistance of a chemical conversion layer in a conventional process and excellent binding force with finish paint, and can be used for replacing two processes of the chemical conversion layer and a primer layer in the conventional process, so that the production efficiency of a color-coated sheet is improved while the cost is saved; and when the temporary antirust liquid acts on a cold-rolled steel sheet, a formed conversion film has certain self-repairing capability.

Description

technical field [0001] The invention relates to the field of color-coated plates, in particular to a preparation method of a temporary anti-rust liquid for color-coated plates. Background technique [0002] The substrates commonly used for color-coated sheets include cold-rolled steel sheets, hot-dip galvanized sheets, electro-galvanized sheets, and galvanized sheets. Topcoat), the main function of the chemical conversion layer is to provide temporary anti-corrosion effect for the substrate before the substrate is painted, and the main function of the primer layer is to improve the bonding force between the substrate and the finish paint layer. In the production process, coating the chemical conversion layer and the primer layer on the base material is two processes, the production cost is high, and the production time is long. The color-coated steel plate based on cold-rolled steel plate is relatively cheap, but in the process of use, after the surface coating is scratched...

Claims

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Application Information

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IPC IPC(8): C09D183/08C09D5/08C09D7/61C09D7/63C10M173/02C08G77/26C08G77/14C08G77/06C10N30/12C10N50/00
CPCC08G77/06C08G77/14C08G77/26C08G2150/90C08K2003/3045C08K2201/014C09D5/08C09D183/08C10M173/02C10M2201/102C10M2207/141C10M2215/04C10M2229/052C09D7/61C09D7/63C08K13/02C08K3/28C08K3/34C08K5/098C08K5/175C08K3/30
Inventor 黄勇陆飚罗晓锋郭文勇
Owner 武汉迪赛新材料有限公司
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