Novel high-water-whitening-resistance aqueous artificial granite composite coating finishing varnish, and its preparation method

Abstract

The invention provides a novel high-water-whitening-resistance aqueous artificial granite composite coating finishing varnish. The finishing varnish is composed of a component A and a component B, wherein the component A comprises the following components, by mass, 40-50% of an aqueous hydroxy fluorocarbon emulsion, 20-30% of an aqueous hydroxy acrylic resin, 0.2-0.4% of a leveling agent, 0.2-0.4% of an antifoaming agent, 0.1-0.2% of a drier and 20-30% of water; and the component B can be dissolved or emulsified in water, and is a hydrophilic modified hexamethylene diisocyanate trimer solution having a mass percent of 75-85%. The invention also provides a preparation method of the finishing varnish. The finishing varnish is obtained by uniformly mixing the component A and the component B according to a weight ratio of the component A to the component B of 6-10:1, and allowing the obtained mixture to stand for 10-15min for use. An artificial granite coating is finished through the self-drying fluorocarbon finishing varnish via the two aqueous components at normal temperature in the invention to solve the water-whitening resistance problem. The finishing varnish provided by the invention has the advantages of film formation through normal temperature curing and drying, good endurance, simple construction, and realization of direct spraying or roller coating on the surface of the aqueous artificial granite coating; and the coating has the advantages of excellent weatherability, excellent self cleaning performance, and excellent water-whitening resistance.

Description

technical field [0001] The invention relates to a water-based imitation granite composite paint finish varnish. technical background [0002] Water-based imitation granite paint, also known as water-based colorful paint or water-based imitation marble paint, refers to a water-based paint that can obtain colorful patterns after one-time painting. Water-based multi-color paint was first studied by Americans, and it became a paint product that can be applied to buildings in the mid-1990s. In recent years, it has gradually become known to Chinese people during the construction of mainland projects. The emergence of water-based multicolor coatings is a major breakthrough in the field of traditional architectural coatings. It overcomes the shortcomings of the O / W oil-in-water multicolor coatings that appeared in the mid-1980s that contained volatile organic compounds and other toxic substances, and is more energy-saving and environmentally friendly. . It is a new generation of g...

AI Technical Summary

Problems solved by technology

In recent years, there have been many domestic manufacturers of water-based imitation granite coatings. However, due to the W / W water-in-water type imitation granite coating formulation contains more hydrophilic substances, the coating itself has poor water resistance, and its decoration Most of the top coats are water-resistant general top varnishes, and the composite coating formed by it has poor water-whitening resistance, and it is easy to produce whitening after being washed by rain, which seriously affects the decorative effect of the water-based imitation granite composite coating. and service life