Water-base depainting agent

A paint remover, water-based technology, applied in the direction of chemical paint/ink remover, coating, etc., can solve the problems of rust on steel parts, difficult operation, harmful to human body, etc., and achieve fast paint removal speed and applicable surface Wide, less toxic effects

Inactive Publication Date: 2007-07-18
DALIAN SANDAAOKE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 2. Does not contain halogenated hydrocarbon solvents, but generally contains toxic substances such as toluene, acetone, ethyl acetate, etc., which are not only harmful to the human body, but also belong to flammable products, which is not conducive to safe production;
[0005] 3. Use concentrated sulfuric acid as a paint remover. Due to the strong corrosiveness of concentrated sulfuric acid, it will strongly corrode paint stripping tanks, workpieces, and human skin. Iron and steel parts exposed to water under acidic conditions are prone to rusting; the overall operation is extremely difficult, and a little carelessness will endanger personal safety;
[0006] 4. Some use concentrated caustic soda solution to heat and cook to remove the paint, but the entire paint removal time takes several hours, even more than ten hours, which is long and consumes a lot of energy

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 5-30% of total weight of potassium hydroxide or sodium hydroxide (solid), 1-15% of total weight of alkyl phosphate and / or imidazoline type surfactant, 0.5-15% of total weight of non-halogenated Hydrocarbon solvent, 0.1-3% solubilizer by total weight, and water as the balance.

[0022] The preparation method is as follows: dissolving potassium hydroxide or sodium hydroxide in water, adding non-halogenated hydrocarbon solvent, surface active agent and solubilizing agent successively under stirring, stirring and dissolving evenly.

[0023] Method of use: completely immerse the device to be stripped in the stock solution of the present invention or a diluted solution mixed with water (the ratio of the stock solution to water is 1: 0.5 to 1.5), and cook for 1 to 30 minutes at a temperature range of 70 to 90°C Take it out and rinse with tap water.

Embodiment 2

[0025] Take 5-30% of total weight of potassium hydroxide or sodium hydroxide (solid), 1-15% of total weight of alkyl phosphate and / or imidazoline type surfactant, 0.5-15% of total weight of non-halogenated Hydrocarbon solvent, 0.1-3% solubilizer by total weight, and water as the balance. Wherein the non-halogenated hydrocarbon solvent can be at least one in the phenyl ether of ethylene glycol, the phenyl ether of diethylene glycol, the phenyl ether of polyethylene glycol and the diethyl ether of ethylene glycol, the butyl ether of ethylene glycol, A mixture of at least one of diethylene glycol diethyl ether, diethylene glycol butyl ether, polyethylene glycol diethyl ether, and polyethylene glycol butyl ether, and the ratio of the two is 1:0.5-2.

[0026] Preparation method and method of use are the same as in Example 2.

Embodiment 3

[0028] Others are the same as embodiment 1 or embodiment 2, but the solubilizing agent sodium p-toluenesulfonate or sodium xylenesulfonate therein.

[0029] The effect is as follows:

[0030] 1. For the water-soluble resin paint on the surface of the tool steel, using Example 1 of the present invention, it takes 30 minutes to remove it at 90° C., and the tool steel does not change color after the paint is removed.

[0031] 2. For the epoxy resin paint and phenolic resin paint on the surface of automobile parts such as plastics and rubber, using the embodiment 2 of the present invention, only 5 to 10 minutes can be removed at 70 ° C, and the plastics and rubber do not have swelling, dissolution, deformation and corrosion occur.

[0032] 3. to various paints such as alkyd paint, nitro paint, acrylic paint, epoxy paint, amino paint, phenolic resin paint and polyurethane paint on steel parts, use embodiment 3 of the present invention, at 70~90 ℃ only It takes 5 to 10 minutes to ...

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PUM

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Abstract

The water-base paint remover consists of potassium hydroxide or sodium hydroxide 5-30 wt%, alkyl phosphate and / or imidazoline surfactant 1-15 wt%, no-halohydrocarbon solvent 0.5-15 wt%, solubilizer 0.1-3 wt% and water for the rest. It has the advantages of low cost, fast paint removing speed, no corrosion on the iron and steel base, wide application range, environment friendship, etc.

Description

Technical field: [0001] The invention relates to a paint remover for removing paint on the surface of metal workpieces, in particular to a water-based paint remover with low cost, fast paint removal speed, no corrosion to the substrate of steel parts, wide application and environmental protection Background technique: [0002] In the process of industrial production and maintenance, it is often necessary to repaint the substrate after stripping the paint, such as defective products in the process of painting, old pipes and old equipment in pipeline maintenance and equipment maintenance, etc. There are basically the following types of paint removers currently in use: [0003] 1. Halogenated hydrocarbon solvent type, such as paint remover composed of dichloromethane, chloroform, trichloroethylene, phenol, trimixed cresol, formic acid, chloroacetic acid, toluene, mixed benzene, etc., the components are not only It is poisonous to the human body and has a destructive effect on ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D9/04
Inventor 吕栓锁
Owner DALIAN SANDAAOKE CHEM
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