Water Based Varnish for Acrylic Paintings

There are many kinds of waterborne film-forming resins, but the copolymer resin of acrylic acid system is widely used at home and abroad. The properties of waterborne acrylic copolymer resin depend on the composition of monomer, the synthesis of monomer and synthesis process. Waterborne acrylic copolymer resin has a series of excellent properties, such as good film-forming property, good gloss, high transparency, rapid drying, wear resistance and water resistance. It is widely used in Waterborne Glazing agents and Waterborne Glazing coatings. Auxiliary agent is to improve the physicochemical properties and processing characteristics of water-based polishing agent. Auxiliary agents mainly include the following.

① Curing agent: improve the film-forming property of water-based main agent and increase the cohesion strength of film layer.

② Surfactant: reduce the surface tension of aqueous solvent and improve leveling.

③ Defoamer: it can control the foaming of polishing agent for a long time and eliminate quality defects such as fish eyes and pinholes.

④ Desiccant: increase the drying speed of water-based polishing agent and improve the suitability of paper prints.

⑤ Adhesion AIDS: improve the adhesion between film-forming materials and substrates.

⑥ Wetting dispersant: improve the dispersibility of the main agent, prevent dirt and improve wear resistance.

⑦ Other additives: plasticizers that can improve folding resistance, etc.

There are many kinds of auxiliary agents, and the types of upper vision glazing agents are different. For example, infrared water based varnish for acrylic paintings and matte varnish are different kinds of varnish, so the composition of auxiliary agent is also different. However, it should be noted that the use of various additives should not exceed 5% of the total, otherwise it will affect the processing suitability of the polishing agent.

The main function of solvent is to disperse or dissolve synthetic resin and various additives.

The solvent of water based varnish for acrylic paintings is mainly water. Colorless, tasteless, non-toxic, wide source and low price.

The volatility of water is almost zero. Its leveling performance is very good. However, the solvent of water based varnish for acrylic paintings also has some shortcomings, such as slow drying speed, easy to cause process failures such as unstable product size. Therefore, ethanol is often added in use to improve the drying performance of aqueous solvents and the processability of aqueous acrylic varnish.

In addition, because UV varnish is ideal in drying, it can complement each other if it is introduced into water based varnish for acrylic paintings. Therefore, a new drying method has been developed. Ultraviolet glazing coating can form a bright film in a few seconds, and glazing coating dried by mixed irradiation of ultraviolet and infrared rays.

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