Cleaning agent of alkali finishing coat and preparation method

Abstract

The invention relates to a cleaning agent of an alkali finishing coat, which combines an alkali paint removing component and an organic depainting component for use, wherein the weight ratio of a total component comprising the alkali component and water to the organic component is from 9:11 to 12:8; the cleaning agent of the alkali finishing coat is prepared by the following method: (1) mixing sodium hydroxide, sodium carbonate and sodium dodecyl benzene sulfonate and stirring; (2) adding ethanolamine and ethylene glycol monobutyl ether; (3) adding ethanol and mixing evenly; and (4) heating. The invention has the advantages that the cleaning agent has simple formula, convenient preparation and very small toxicity and has a very good paint removing action for a finishing coat mobile telephone casing or similarities taking acrylic acid as a main part, a product with disqualified surface spraying or a residual product can be recycled after being processed, the use rate of resources is enhanced, and the fund and energy resources are saved. The used paint remover can be used for the second time, and the original components of the paint remover can also be replenished for use for many times. No special requirement for the water quality exists, and tap water can also be adopted.

Description

(1) Technical field: [0001] The invention relates to a cleaning agent for top paint, in particular to an alkaline cleaning agent for top paint and a preparation method thereof. (2) Background technology [0002] Traditional paint removers are usually divided into two categories: inorganic paint removers and organic paint removers. Inorganic paint removers can generally be divided into two types: alkaline paint removers and acid paint removers. Among them, the alkaline paint remover is mainly composed of alkaline substances (commonly used sodium hydroxide, soda ash, water glass, etc.), surfactants, corrosion inhibitors, etc. Heating is generally required during use. On the one hand, certain groups in the alkali paint are saponified and dissolved in water. On the other hand, the hot steam cooks the paint film, making it lose its strength and adhesion with the metal, and the surfactant Infiltration, penetration and affinity. This eventually causes the old paint layer to fade...

AI Technical Summary

Problems solved by technology

[0004] With the development of new technology, the paint layer on the surface of the workpiece is no longer a single paint layer, but a multi-layered paint layer with complex components, which makes it impossible to use alkaline paint remover or organic paint remover alone to meet certain requirements. According to the needs of some workpieces, the formula of such paint remover is complex and the effect is poor, so the combined use of different paint removers becomes an inevitable