Waterborne two-component coating composition and preparation method thereof

Abstract

The invention provides a waterborne two-component coating composition and a preparation method thereof. The two-component coating composition comprises a base component and a curing component, whereinthe base component at least comprises a hydroxyl acrylic emulsion, an acrylic emulsion, and a dispersion slurry, the curing component at least comprises an isocyanate for carrying out a crosslinkingreaction with the hydroxyl acrylic emulsion to form a dense paint film, and a mass ratio of the base component to the curing component is 100:(10-20). The two-component coating composition provided bythe invention has low coating cost and ideal water resistance, and the water resistance is up to 150 h.

Description

technical field [0001] The invention belongs to the field of water-based paint coatings, in particular to a water-based two-component coating composition and a preparation method thereof. Background technique [0002] As the world's environmental protection requirements for products are getting higher and higher, water-based paints have obvious advantages in manufacturing, transportation, coating, odor, and environmental performance, and are widely welcomed. Because of the hydrophilic properties of water-based paints, the paint film of water-based paints has poor water resistance. Although the water resistance requirement of GBT23999-2009 for water-based paint coatings is no exception for 24 hours, in daily life, the surface of furniture (such as dining tables, coffee tables, cabinets, etc.) will be in contact with water for a long time, which will cause the paint film to turn white after soaking in water , bubbling, shedding and other disadvantages, and in a humid climate,...

AI Technical Summary

Problems solved by technology

Because of the hydrophilic properties of water-based paint coatings, the water-resistant paint film of water-based paint coatings is poor

Although the water resistance requirement of GBT23999-2009 for water-based paint coatings is no exception for 24 hours, in daily life, the surface of furniture (such as dining tables, coffee tables, cabinets, etc.) will be in contact with water for a long time, which will cause the paint film to turn white after soaking in water , bubbling, shedding and other disadvantages, and in a humid climate, especially in the rainy season, when the humidity in the air is greater than 70%, the paint film is also prone to the above disadvantages

Therefore, the water resistance is 24 hours, and it is difficult to meet the requirements of frequent contact with moisture furniture and high humidity environment. It is of great significance to prepare water-based paint coatings with super water resistance.

Images