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Paint remover for removing cathodic electrophoretic paint film on surface of steel plate

A technology of cathodic electrophoresis and paint stripper, applied in the direction of chemical paint/ink remover, coating, etc., can solve the problem of large and long metal surface corrosion, which generally takes dozens of hours, etc., achieves low human toxicity, The effect of rapid paint stripping and shortened analysis and evaluation time

Active Publication Date: 2010-12-22
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it is usually very corrosive to the metal surface, and the phosphating film is removed at the same time as the electrophoretic paint film is removed, and the paint removal time is long, generally taking tens of hours

Method used

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  • Paint remover for removing cathodic electrophoretic paint film on surface of steel plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1. Preparation of paint remover: Take 90ml of N,N-dimethylformamide (DMF) and 10ml of ethylene glycol butyl ether, and mix them evenly.

[0021] 2. Paint stripping test: Place 1#, 2#, and 3# samples in flat-bottomed conical flasks filled with paint remover, install an air condenser at the mouth of the bottle, and heat them in a water bath at 60°C for 8 minutes. The paint film begins to swell and break away from the surface of the steel plate, cool at room temperature, rinse the residual paint film on the surface of the steel plate with distilled water, and air dry.

Embodiment 2

[0023] 1. Preparation of paint remover: Take 80ml of N,N-dimethylformamide (DMF) and 20ml of ethylene glycol butyl ether, and mix them evenly.

[0024] 2. Paint stripping test: Place 1#, 2#, and 3# samples in flat-bottomed conical flasks filled with paint strippers, install an air condenser at the mouth of the bottle, and heat them in a water bath at 60°C for 10 minutes. The paint film begins to swell and break away from the surface of the steel plate, cool at room temperature, rinse the residual paint film on the surface of the steel plate with distilled water, and air dry.

Embodiment 3

[0026] 1. Preparation of paint remover: Take 20ml of N,N-dimethylformamide (DMF) and 80ml of ethylene glycol butyl ether, and mix them evenly.

[0027] 2. Paint stripping test: Place 1#, 2#, and 3# samples in flat-bottomed conical flasks filled with the above solutions respectively, install an air condenser at the mouth of the bottle, heat in a water bath at 60°C for 40 minutes, and then remove to normal temperature. Cool down, rinse the residual paint film on the surface of the steel plate with distilled water, and air dry.

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Abstract

The invention relates to a paint remover for removing a cathodic electrophoretic paint film on the surface of a steel plate. The paint remover comprises the following components in volume ratio: 20-90 parts of amine compound and 10-80 parts of ether compound. The preferable volume ratio of the components of the paint remover is: 80-90 parts of amine compound and 10-20 parts of ether compound. The amine compound is one or two of formamide and N,N'-dimethylformamide; and the ether compound is one or two of butyl cellosolve and ethylene glycol. The two types of compounds are mixed proportionally to obtain the paint remover. During paint removal, the steel plate to be paint-removed is completely soaked in a solution of the paint remover, and the operating temperature range of the paint remover is 30-100 DEG C. The paint remover can meet the requirements of high pain removal speed, no corrosion to substrates, simple preparation, easy operation, convenient use and low toxicity to the human body.

Description

technical field [0001] The invention relates to a paint remover for removing the paint film on the surface of a steel plate. Background technique [0002] Existing methods for metal stripping include chemical removal, mechanical removal and thermal removal (burning). Since the latter two methods are more harmful to the substrate, the most commonly used method is to remove the paint film by chemical methods. [0003] Paint removers are divided into two categories: organic and inorganic. Chlorinated hydrocarbon solvent-based paint remover is the mainstream organic paint remover, with dichloromethane and chloroform as the main solvent. This kind of paint remover has a short paint removal time and high paint removal efficiency. For example, the patent with the publication number CN1082079A discloses a fast water-based chemical paint remover, which is composed of formic acid, ethanol, chloroform, sodium dodecylbenzenesulfonate, chloroacetic acid, etc., and can remove metal surfa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D9/00C09D9/04
Inventor 朱岚戴毅刚
Owner BAOSHAN IRON & STEEL CO LTD
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