Water-thinned epoxy wood white primer and preparation method thereof

Abstract

The invention discloses water-thinned epoxy wood white primer which is prepared from by main paint, a curing agent and a diluent.The main paint is prepared from, by mass, 40-55% of epoxy resin, 0.2-0.5% of a defoaming agent, 0.5-0.8% of a dispersion agent, 0.2-0.4% of a leveling agent, 1-2% of an anti-sedimentation agent, 15-20% of titanium dioxide, 10-20 parts of filler and 15-20% of a co-solvent.The curing agent is prepared from, by mass, 80% of polyamide and 20% of a modifying agent.Water is adopted as the diluent.The main paint and the curing agent exist in a solvent state, can be cured in the moist environment and have high cross-linking density.A formed coating film is relatively compact, high in hardness and good in stability.An emulsification agent is not adopted in the primer and the problem about water sensitivity of water-based paint is solved.The performance of the primer can be compared to solvent type PU white primer.Compared with PU paint, yellowing resistance can be greatly improved.The primer does not contain toxic matter and is safe and environmentally friendly.

Description

technical field [0001] The invention relates to a paint, in particular to an epoxy white primer. Background technique [0002] Solvent-based PU white primer has the advantages of flat paint film, strong filling power, fast drying, high hardness, easy sanding, good adhesion, and strong hiding power. However, PU white primer is a solvent-based paint. Type primers are toxic, benzene and other harmful solvents and volatile organic compounds are high in content, causing harm to users and affecting people's health. Secondly, PU white primers have poor yellowing resistance and increase in time. Affects the appearance; in recent years, with the enhancement of people's awareness of environmental protection, water-based wood paint has become more and more popular in the market due to its advantages of non-toxic environmental protection, odorless, very little volatile matter, high safety of non-flammable and non-explosive, and large painting area. Welcome. However, the water-based wo...

AI Technical Summary

Problems solved by technology

[0002] Solvent-based PU white primer has the advantages of flat paint film, strong filling power, fast drying, high hardness, easy sanding, good adhesion, and strong hiding power. However, PU white primer is a solvent-based paint. Type primers are toxic, benzene and other harmful solvents and volatile organic compounds are high in content, causing harm to users and affecting people's health. Secondly, PU white primers have poor yellowing resistance and increase in time. Affects the appearance; in recent years, with the enhancement of people's awareness of environmental protection, water-based wood paint has become more and more popular in the market due to its advantages of non-toxic environmental protection, odorless, very little volatile matter, high safety of non-flammable and non-explosive, and large painting area. Welcome

However, the water-based wood white primers sold on the market, whether they are single-component or two-component, have unstable coating film quality and low film hardness. Compared with solvent-based PU white primers, there is a big gap in performance, such as Pollution of water quality during construction and production, poor physical and chemical properties of the coating film, imperfect coating construction supporting system and other factors lead to poor coating effect, poor fullness, poor compactness and anti-blocking of the coating film, low hardness, and do not meet Chinese standards. Aesthetic requirements for coating effects, poor stability, long construction time, unable to meet the coating requirements of industrialized high-efficiency, high-quality and high-decoration furniture

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