Paint remover for plane aluminium alloy skin depainting treatment

A technology of aluminum alloy and paint remover, applied in the direction of chemical paint/ink remover, coating, etc., can solve the problems of excessive corrosion of aluminum alloy substrates, large environmental pollution, slow paint removal speed, etc. The effect of high paint efficiency

Inactive Publication Date: 2010-06-09
合肥华清方兴表面技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] In order to overcome the defects of the existing paint strippers on the surface of aircraft aluminum alloy skin, such as slow paint removal speed, high environmental pollution, and high overcorr

Method used

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  • Paint remover for plane aluminium alloy skin depainting treatment
  • Paint remover for plane aluminium alloy skin depainting treatment
  • Paint remover for plane aluminium alloy skin depainting treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] An environment-friendly paint remover for aircraft aluminum alloy skin paint removal treatment consists of the following raw materials in weight ratio:

[0074] 35 parts of N-methylpyrrolidone (N-P)

[0075] α-pyrrolidone (α-P) 30 parts

[0076] 5 parts benzyl alcohol

[0077] 3 parts formic acid

[0078] Salicylic acid 15 parts

[0079] 4 parts carboxymethyl cellulose

[0080] 2 parts p-methyltriazole

[0081] The specific preparation method is as follows:

[0082] (1) Preparation of main solvent

[0083] Accurately weigh 40 parts of N-methylpyrrolidone (N-P), 30 parts of α-pyrrolidone (α-P) and 6 parts of benzyl alcohol, mix them in a container, stir well, and set aside.

[0084] (2) Accelerator preparation Accurately weigh 4 parts of formic acid and 15 parts of salicylic acid in a container, stir well and set aside.

[0085](3) Add the accelerator prepared in step (2) to the main solvent prepared in step (1); after stirring evenly with a stirrer, slowly add 4...

Embodiment 2

[0088] An environment-friendly paint remover for aircraft aluminum alloy skin paint removal treatment consists of the following raw materials in weight ratio:

[0089] 42 parts of N-methylpyrrolidone (N-P)

[0090] 30 parts of α-pyrrolidone (α-P)

[0091] 5 parts dimethyl sulfoxide

[0092] 5 parts formic acid

[0093] 12 parts terephthalic acid

[0094] Carboxymethylcellulose 5 parts

[0095] Thiazole 1 part

[0096] The specific preparation method is as follows:

[0097] (1) Preparation of main solvent

[0098] Accurately weigh 42 parts of N-methylpyrrolidone (N-P), 30 parts of α-pyrrolidone (α-P) and 5 parts of dimethyl sulfoxide into a container for mixing, fully stir evenly, and set aside.

[0099] (2) Accelerator preparation

[0100] Accurately weigh 5 parts of formic acid and 12 parts of terephthalic acid into a container, stir well and set aside.

[0101] (3) Add the accelerator prepared in step (2) to the main solvent prepared in step (1); after stirring even...

Embodiment 3

[0104] An environment-friendly paint remover for aircraft aluminum alloy skin paint removal treatment consists of the following raw materials in weight ratio:

[0105] 40 parts of N-methylpyrrolidone (N-P)

[0106] α-pyrrolidone (α-P) 35 parts

[0107] 5 parts formic acid

[0108] 9 parts p-toluenesulfonic acid

[0109] 3 parts carboxyethyl cellulose

[0110] Benzotriazole 0.5 parts

[0111] The specific preparation method is as follows:

[0112] (1) Preparation of main solvent

[0113] Accurately weigh 40 parts of N-methylpyrrolidone (N-P) and 36 parts of α-pyrrolidone (α-P) into a container for mixing, fully stir evenly, and set aside.

[0114] (2) Accelerator preparation

[0115] Accurately weigh 5 parts of formic acid and 15 parts of p-toluenesulfonic acid into a container, stir well and set aside.

[0116] (3) Add the accelerator prepared in step (2) to the main solvent prepared in step (1); after stirring evenly with a stirrer, slowly add 4 parts of carboxyethyl ...

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Abstract

The invention relates to a paint remover for plane aluminium alloy skin depainting treatment; the paint remover comprises more than two kinds of 70-80 parts of main solvent, two kinds of 12-18 parts of accelerators, 4-5 parts of thickening agents and 0.5-2 parts of corrosion inhibitors; the main solvent includes N-methylpyrrolidone (N-P), alpha-pyrrolidone (alpha-P), benzyl alcohol and dimethyl sulfoxide; the accelerator is soluble organic acid with lower than 1000 of molecular weight, and the molecular weight includes methanoic acid, salicylic acid, p-toluenesulfonic acid and terephthalic acid; the thickening agent is carboxymethylcellulose or carboxyethyl cellulose; and the corrosion inhibitor is p-methyl pyrrodiazole, thiazole and benzotriazole. The paint remover can remove the paint film on the surface of the plane aluminium alloy skin in a short time (within 35min) in a in-situ way, and the paint remover has no over etching to the surface of the aluminium alloy and has recoatability.

Description

technical field [0001] The invention belongs to a preparation and a corresponding process for removing paint films of epoxy resin, polyurethane and acrylic resin, and in particular relates to an environment-friendly treatment agent for paint removal treatment on the surface of aircraft aluminum alloy skin. Background technique [0002] Paint film can protect and decorate items, but in the process of use, the paint film is often damaged and will gradually age. Coupled with other reasons, the item needs to be repaired and renewed. When repainting or repairing household appliances, mechanical equipment, furniture, vehicles and ships, etc., it is necessary to remove old or damaged coatings before painting. The paint film is mainly composed of film formers, pigments, fillers and additives. The working principle of the paint remover is mainly to use the solvent to dissolve or swell the film-forming substance to destroy the composition structure of the paint film to achieve the pu...

Claims

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Application Information

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IPC IPC(8): C09D9/00
Inventor 刘万青饶丹徐兴付
Owner 合肥华清方兴表面技术有限公司
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