High-adhesive-force and low-temperature refinishing paint composition and preparation method thereof

Abstract

The invention discloses a high-adhesive-force and low-temperature refinishing paint composition and a preparation method thereof. The refinishing paint composition is prepared from a curing componentand a diluting component, wherein the curing component is prepared from the following components: a rheological auxiliary agent, acrylic resin, amino resin, a first solvent, a CAB (Cellulose Acetate Butyrate) solution and a leveling agent; the diluting component is prepared from the following components: a second solvent, a third solvent, a fourth solvent, a leveling agent, first isocyanate and second isocyanate. The preparation method of the refinishing paint composition comprises preparation of the curing component and preparation of the diluting component. After refinishing paint provided by the invention is subjected to color mixing, requirements on various refinishing paint in the market can be met. In a construction process, the surface of a coated part does not need to be subjectedto polishing treatment in a refinishing or coating process and the refinishing paint is directly sprayed, so that a refinishing procedure is accelerated and the time of a refinishing process is shortened; meanwhile, manual polishing is reduced and the refinishing cost is saved.

Description

technical field [0001] The invention relates to a preparation and a preparation method of a low-temperature repair paint applied to automobile paints, in particular to a preparation method of a low-temperature repair paint with high adhesion without grinding the repair substrate. Background technique [0002] Before the car leaves the factory, the appearance of the paint film of the car body will be inspected. When the original paint on the car body has defects such as shrinkage cavity, exposed bottom, heat rash, etc., the paint film of the car body needs to be repaired. Generally, the defective parts are polished, and then sprayed with a repair paint matching the color of the original paint, and then polished after drying to eliminate the defects of the car body paint film. During the use of the car, accidents or aging of the paint film will also cause damage to the appearance of the car body paint film, and there will be problems such as paint drop and scratches, which req...

AI Technical Summary

Problems solved by technology

[0004] Defects of the prior art: grinding requires a lot of manpower and material resources, which increases the finished product, and for high-standard coatings, color differences and stains will be formed at the grinding place, making the color of the entire coating uneven and affecting the appearance; Insufficient grinding or repair of missing parts will easily lead to poor adhesion and the risk of paint film falling off in the later stage; third, the polished surface must be thoroughly cleaned of the grinding dust on the surface, otherwise the sprayed paint will have poor adhesion, Cause paint film peeling, poor weather resistance, poor mechanical properties and other disadvantages

4. Although there are low-temperature refinish paint-related products on the market, some high-temperature refinish paints are still used in practice. High-temperature refinish paint requires high baking temperature and high energy consumption for repair

Images