A kind of pu matte clear topcoat and preparation method thereof

Abstract

The invention belongs to the field of wood paints, and particularly relates to a PU (polyurethane) matt finish varnish and a preparation method thereof. The PU matt finish varnish is formed by mixing a component A, a component B and a component C in a weight ratio of 1:0.5:(0.5-0.7). The component A is prepared from 60-72.3 wt% of mixed alkyd resin, 6-10 wt% of polyamide wax antisettling slurry, 2-5 wt% of dimethylbenzene, 1-1.2 wt% of wetting and dispersing agent, 0.4-0.8 wt% of leveling agent, 0.3-0.5 wt% of defoaming agent, 0.5-1.5 wt% of electric conductivity improver, 1-3 wt% of methyl isobutyl ketone, 1-3 wt% of modified polyethylene wax powder, 3-5 wt% of matting power and 3-10 wt% propylene glycol methyl ether acetate. The component B is a curing agent component. The component C is a diluter component. The coating of the PU electrostatic matt finish varnish has the advantages of high adhesive force, favorable transparency, high fullness, favorable flexibility, favorable scratch resistance, uniform gloss, stable impact resistance, favorable water resistance, favorable chemical resistance and the like. The finish varnish is suitable for electrostatic coating of office furniture, wood doors and various other wood products.

Description

technical field [0001] The invention belongs to the field of wood lacquer coatings, and in particular relates to a PU matte clear finish and a preparation method thereof. Background technique [0002] Modern living furniture and decorations are getting more and more attention in people's lives. With the prosperity of the furniture industry in the past 30 years of reform and opening up, the corresponding wood lacquer coatings have also been further improved. In order to better show the natural characteristics of wooden furniture such as textures and lines, the requirements for paint decoration have also been raised. There are also product requirements for the transparency, leveling, flatness, and gloss uniformity of the paint film. At the same time, the paint film is easy to be scratched and worn during furniture transportation, storage, use, and maintenance. , also put forward new requirements. [0003] With the deepening of people's understanding of coating products, due...

AI Technical Summary

Problems solved by technology

[0003] With the deepening of people's understanding of coating products, due to the use of air spraying in ordinary PU matt clear topcoats, the utilization rate of coating coatings is low, and insufficient atomization causes old paint films after film formation, uneven gloss, and Disadvantages such as film thickness requirements can only be achieved after multiple coatings

During painting, the paint mist will volatilize a large amount of organic volatiles and free isocyanate, which seriously pollutes the air environment and poses a hazard to the health of construction workers.

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