Environment-friendly removing agent of covering paint as well as preparation method and application of environment-friendly removing agent

Abstract

The invention belongs to the field of environment-friendly paint removers, and discloses an environment-friendly removing agent of a covering paint as well as a preparation method and using method of the environment-friendly removing agent. The environment-friendly removing agent of the covering paint contains the following components in percentage by mass: 5-45% of an alkali compound, 0.5-15% of an inorganic auxiliary agent, 5-30% of an organic auxiliary agent, 0.5-5% of a surfactant, and the balance of water. The environment-friendly removing agent of the covering paint is in the form of a water aqua, is safer and lower in toxicity and VOC (volatile organic compound) compared with the conventional dichloroethane type removing agent, and is safe to operators; the removing time of a preferred plan is only 5 minutes, so that the advantage of an organic solvent removing agent on removing time is not obvious anymore. Compared with an acidic system removing agent, the environment-friendly removing agent does not generate pungent smells, and is safe to a base material to ensure that the base material can not be corroded and generate rusts. Compared with a conventional alkali system removing agent, the environment-friendly removing agent is safer and more efficient.

Description

technical field [0001] The invention belongs to the field of environment-friendly paint strippers, in particular to an environment-friendly stripper for masking paint and its preparation method and application. Background technique [0002] In recent years, with technological innovation and rapid economic development, a large number of electronic products have entered the world of people, such as smart phones, PC computers, tablet computers, MP3, small household appliances and so on. Due to the complex production process of electronic products, it is usually necessary to remove the paint and paint film in the following two situations: 1. The production process needs to protect the surface of the workpiece so as not to affect the subsequent processes, so UV light-cured polymer coatings are used , The paint film is protected, and the paint and the paint film need to be removed in the next process. 2. Production requires UV light-cured paint film for decoration and protection....

AI Technical Summary

Problems solved by technology

2. Production requires UV light-cured paint film for decoration and protection. The paint film does not meet the quality requirements during production. In order to save costs, it needs to be removed and reworked

[0003] At present, paint removers are mainly organic solvent systems and acidic systems: 1. The traditional organic solvent removers are mainly dichloromethane-type removers, which have a fast removal time and are safe to the substrate of the workpiece , but high toxicity, fast volatilization, and non-durability increase the cost; due to the improvement of environmental protection awareness at home and abroad, this type of stripper is restricted or replaced

2. The acidic system remover mainly uses formic acid, acetic acid, sulfuric acid and other acids as the main system. This type of remover has an irritating odor, corrodes the base material of the workpiece, and is easy to rust, which cannot meet the process requirements

Therefore, people are gradually focusing on the research and development of the remover of the alkaline water system, but there are relatively few of them, and most of them are not safe for the substrate of the workpiece, causing the surface of the stainless steel to be stained and colored.

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