A kind of powder paint stripping composition and its preparation method and application

Abstract

The invention discloses a use of tert-butyl hydroperoxide in preparation of a powdery coating removal composition and the coating removal composition. The coating removal composition comprises, by mass, 48 to 60% of dichloromethane, 15 to 30% of methanol, 15 to 25% of tert-butyl hydroperoxide, 1 to 2% of liquid paraffin and 0.2 to 1% of sodium hydroxide. The coating removal composition provided by the invention has the advantages of low cost, less pollution, short coating removal time and strong penetrability, can realize complete separation of the coating and a base and does not produce corrosion to the base. The coating removal composition provided by the invention also has strong depainting ability to the thick coating, is recyclable and reused after being soaked or rinsed, is especially suitable for removing the metal surface coating, comprises epoxy resin, polyurethane or acrylic resin, and can provide a technical support for development of an industrial cleaning agent.

Description

technical field [0001] The invention belongs to the field of industrial cleaning, and more specifically relates to a powder paint stripping composition and a preparation method and application thereof. Background technique [0002] The organic solvent-based paint remover with dichloromethane as the main solvent is a common paint remover on the market. Can add strong alkali or strong acid in the existing dichloromethane type paint remover, be beneficial to organic solvent to dissolve paint film and thereby remove paint film, but in existing methylene chloride paint remover, in order to achieve better stripping Paint effect, the concentration of strong alkali and strong acid is generally above 3%, and the content of dichloromethane is also relatively high. The above-mentioned strong alkali and strong acid conditions are easy to cause corrosion to metal substrates, and at the same time, the content of organic solvents is too high. The toxicity and environmental pollution of la...

AI Technical Summary

Problems solved by technology

Can add strong alkali or strong acid in the existing dichloromethane type paint remover, be beneficial to organic solvent to dissolve paint film and thereby remove paint film, but in existing methylene chloride paint remover, in order to achieve better stripping Paint effect, the concentration of strong alkali and strong acid is generally above 3%, and the content of dichloromethane is also relatively high. The above-mentioned strong alkali and strong acid conditions are easy to cause corrosion to metal substrates, and at the same time, the content of organic solvents is too high. The toxicity and environmental pollution of lacquer agent increase, and in addition, existing dichloromethane type paint remover primer and the detachment effect of base material are not good, easy to leave paint film residue at the corner etc. of base material, and it is in During the detachment process, the paint film is dissolved in the paint remover to form a waste liquid, which leads to complicated waste liquid treatment, difficulty in recycling, low number of reuses, and the existing paint remover needs 0.5~ 1h, the overall efficiency is not high