Paint stripper of oil emulsion-in-water

A technology of oil-in-water emulsion and paint remover, applied in chemical paint/ink remover, coating, etc., can solve the problems of high toxicity of paint remover and need to be heated, so as to achieve simple and cheap operation process and avoid heating device, less corrosive effect

Inactive Publication Date: 2008-12-10
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the disadvantages of high toxicity of paint strippers in the prior art and the need for heating during use, the present invention provides an oil-in-

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] A N-Methylpyrrolidone 10g

[0039] Gamma-butyrolactone 5g

[0040] Ethylene glycol butyl ether 9g

[0041] Isophorone 10g

[0042] Acetone 5g

[0043] Octylphenyl polyoxyethylene ether 0.8g

[0044] Sodium Lauryl Sulfate 1g

[0045] water 25g

[0046] Mix the reagents described in A and stir

[0047] B Benzyl alcohol 20g

[0048] Anisole 10g

[0049] Mix B reagent evenly, then slowly add B to A, then add 2g of imidazole, stir to make it uniform, and slowly add 2.2g of methyl cellulose to obtain a paint remover.

[0050] Paint stripping test: Brush the paint stripper on the surfaces of polyurethane specimens, alkyd enamel specimens and acrylic paint specimens, and the paint film will swell and leave the metal surface after four hours. The peeled paint film can be washed off with water. Observe that there is no corrosion on the surface of the test piece.

Embodiment 2

[0052] A N-Methylpyrrolidone 8g

[0053] Gamma-butyrolactone 4g

[0054] Ethylene glycol butyl ether 6g

[0055] Ethyl acetate 5g

[0056] Polyoxyethylene sorbitan monostearate 1g

[0057] Sodium dodecylbenzenesulfonate 1g

[0058] Hydrogen peroxide 5g

[0059] water 25g

[0060] Mix the reagents described in A and stir

[0061] B Benzyl alcohol 30g

[0062] Anisole 5g

[0063] Dimethylsulfoxide 5g

[0064] The reagent in B is mixed evenly, then slowly added to A, stirred to make it uniform, 3 g of benzotriazole is added, and 2 g of sodium carboxymethyl cellulose is added while stirring continuously to obtain a paint remover.

[0065] Paint stripping test: Spray the paint stripper on the surface of polyurethane paint test piece, acrylic paint and polyurethane test piece, and the polyurethane paint film will swell and leave the metal surface after five hours. The peeled paint film can be washed off with water. Observe that there is...

Embodiment 3

[0067] A N-Methylpyrrolidone 20g

[0068] Gamma-butyrolactone 4g

[0069] Acetone 5g

[0070] Dimethylsulfoxide 5g

[0071] Diethylene glycol butyl ether 10g

[0072] Polyoxyethylene sorbitan monooleate 0.9g

[0073] Potassium Oleate 1g

[0074] water 20g

[0075] Mix the reagents described in A and stir

[0076] B Benzyl alcohol 20g

[0077] Anisole 8g

[0078] Mix the reagents in B evenly, then slowly add to A, add 3g of benzotriazole and stir to make it uniform, then add 2g of methylcellulose and 1.1g of polyvinyl alcohol to obtain a paste paint remover.

[0079] Paint stripping test: Brush the paint stripper on the surfaces of polyurethane paint specimens, alkyd enamel paint specimens and acrylic specimens. After four hours, the paint film swells and leaves the metal surface. The peeled paint film can be washed off with water. Observe that there is no corrosion on the surface of the test piece.

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Abstract

The invention discloses an oil-in-water emulsion paint remover. The compositions in percentage by weight of the paint remover are: 2 to 20 percent of nucleophilic monomer, 20 to 60 percent of macromolecular solvent, 3 to 10 percent of gamma-butyrolactone, 3 to 15 percent of alkyl butyl glycol ether, 0.5 to 3 percent of surface active agent (wherein the ratio between a non-ionic surface active agent and an ionic surface active agent is between 2:3 and 3:2 according to mass ratio), 2 to 5 percent of thickening agent, 1.5 to 4 percent of corrosion inhibitor and the balance being water. The oil-in-water emulsion paint remover does not contain a volatile chlorinated organic solvent or other haloid organic solvents, strong acid and strong base; meanwhile, the operative temperature of the paint remover is normal temperature, and the paint remover does not need to be heated; moreover, no oil film is formed, i.e. no secondary coating is needed.

Description

technical field [0001] The invention relates to a paint remover, in particular to a green and environment-friendly oil-in-water emulsion type paint remover. Background technique [0002] After long-term exposure, the paint film will age, crack, peel and fall off, causing the paint film to lose its protective effect. Paint strippers are often used to remove old paint so that new paint can be applied. But so far, most of the paint strippers on the market use chlorinated substances that are highly volatile and harmful to the ozone layer to strip the paint. Although the effect is good, it is very harmful to the operator and the environment. There are also some paint removers that use strong acids or alkalis, such as NaOH, concentrated sulfuric acid, ammonia water, etc., which are very harmful to the substrate, operators and the environment. Or there are also some paint removers with better environmental compatibility, but they need cooking and heating, etc., which increases th...

Claims

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Application Information

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IPC IPC(8): C09D9/04
Inventor 钱春香乔淑媛
Owner SOUTHEAST UNIV
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