Paint remover and its preparing method and using method

Abstract

The present invention relates to one kind of paint remover and its preparation process and usage. The paint remover consists of organic base 30-55 wt %, organic solvent 40-65wt %, and corrosion inhibitor 0.5-7wt %, and during storage and use, its surface is covered with oil sealer. The organic base is alcohol amine with boiling point not lower than 160deg.c and molecular weight smaller than 200; the organic solvent has point not lower than 200deg.c; the corrosion inhibitor is saccharide; and the oil sealer is vegetable oil or mineral oil with density lower than the paint remover and insoluble in the paint remover. The paint remover has simple preparation process, convenient use and environment friendship, and may be used to remove several kinds of paint film in high speed and no corrosion to most of the substrate.

Description

technical field [0001] The invention relates to a paint remover, a preparation method and a use method thereof, and is especially suitable for removing surface coatings of workpieces with large complex structures and sensitive metal substrates. Background technique [0002] At present, the most commonly used paint removers are as follows: [0003] ①Basic paint remover: an aqueous paint remover composed of alkaline compounds such as sodium hydroxide, sodium carbonate, etc.; ②Acidic paint remover: an aqueous paint remover composed of strong acids such as concentrated sulfuric acid, nitric acid, etc.; ③Ordinary solvents Type paint remover: a paint remover composed of common organic solvents such as ketones, esters, alcohols, and benzene with paraffin wax; ④ chlorinated hydrocarbon solvent-based paint remover: dichloromethane, chlorobenzene, etc. The main solvent-based paint remover and other auxiliary materials are added. This kind of paint remover can be roughly divided into ...

AI Technical Summary

Problems solved by technology

Due to increasingly stringent environmental protection requirements, although the raw material prices of alkaline and acidic paint removers are low, the corrosiveness of strong alkali and strong acid not only damages the substrate, but also has adverse effects on the human body and the operating environment.

Although common solvent-based paint removers are less corrosive to substrates, the hazards of solvents to humans and the environment are obvious; chlorinated hydrocarbon solvent-based paint removers are widely used because of their convenient construction and fast paint removal speed. It is also relatively fast, but dichloromethane, which is the main body of the paint remover, is highly volatile, causing great damage to construction personnel and the environment, and does not meet the increasingly stringent environmental protection requirements