Water-based two-component matte varnish and preparation method thereof

Abstract

The invention provides a special yellowing-resistant high-performance water-based two-component matte varnish for dyed veneers. By selecting an emulsion, a curing agent, a light stabilizer, a cosolvent and other auxiliary agents, and by optimizing the ratio of the raw materials, the varnish is suitable for coating of dyed veneer substrate with characteristics of easy discoloration in the presenceof light, provides the protection effect for the substrate, and provides the dyed veneer with characteristics of strong light discoloration resistance; meanwhile, a paint film has strong chemical resistance, outstanding moisture resistance, outstanding water resistance, no bubbling, no delaminating, high adhesion and long activation period.

Description

technical field [0001] The invention relates to the technical field of wood coating production, in particular to a water-based two-component matte clear topcoat with yellowing resistance and high performance specially used for dyed veneer and a preparation method thereof. Background technique [0002] In my country's home furnishing industry, natural veneer, technical veneer and dyed veneer are widely used in furniture and decoration projects. Among them, dyed veneer has the texture of natural veneer, but also complements some of the defects of natural veneer, and has won the favor of the market. [0003] The current special coating for water-based stained veneer is mainly based on varnish, because the transparent coating can better show the unique veneer texture and bright colors of the stained veneer itself. However, because the color on the dyed veneer is processed by special processes such as dyeing, this kind of substrate is prone to discoloration when it encounters su...

AI Technical Summary

Problems solved by technology

However, because the color on the dyed veneer is processed by special processes such as dyeing, this kind of substrate is prone to discoloration when exposed to sunlight.

[0004] Most of the commonly used products on the market are to apply water-based one-component topcoats to dyed veneers. Since the one-component topcoats are formed by physical film formation through moisture volatilization and drying, the paint film is not dense enough. In humid weather, water vapor easily adheres to the paint film and penetrates to the bottom of the paint film to cause whitening and delamination. At the same time, due to the limitation of the performance of the film-forming resin of the one-component product and the influence of the selection of light-stabilizing additives, the coating encounters Under light, the anti-tarnish performance of the substrate is poor

[0005] In addition, although the water-based two-component topcoat products on the market have improved the problems of color change resistance and poor moisture and water resistance of the previous single-component products, due to the defects in the formula, the usable time (pot life) of the product has been reduced. Short, mostly less than 1h (at 35°C)

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