Cross-linking type pure acrylic emulsion for natural stone paint and preparation method

Abstract

The invention provides cross-linking type pure acrylic emulsion for natural stone paint and a preparation method. The internal and external cross-linking type natural stone paint pure acrylic emulsion with the high water white resistance is synthesized by taking hard monomers, soft monomers, a compound emulsifier, internal cross-linking monomers, an organosilicon coupling agent, a thermolysis initiator, a pH regulator and an external cross-linking agent as raw materials and adopting a semicontinuous seeded emulsion polymerization method. According to the natural stone paint acrylic emulsion, Tg of cores and Tg of shells are controlled by designing the constitution and dosage of the soft monomers and the hard monomers in the cores and the shells of latex particles, and therefore the emulsion achieves the good contamination resistance while the good water resistance and film-forming property of the emulsion are guaranteed; through the internal cross-linking monomers and the external cross-linking agent, internal and external double cross-linking of the latex particles is achieved, therefore, the water white resistance of the emulsion is greatly improved, and water white cannot be generated when a coating film is soaked in water for half a month.

Description

technical field [0001] The invention relates to a polymer emulsion for architectural paint, in particular to a cross-linked pure acrylic emulsion for real stone paint and a preparation method thereof. Background technique [0002] Real stone paint, also known as imitation stone paint, is a kind of architectural coating prepared by mixing the main polymer emulsion and natural stone powder of various colors. When it is used on the exterior wall of a building, it can form a decorative effect similar to natural stone such as marble and granite. Moreover, the production process is simple and the construction is convenient. It is an ideal material to replace the decorative surface effect of natural stone. [0003] As a kind of architectural exterior wall coating, real stone paint is used outdoors and will often be tested by outdoor environmental conditions such as wind, rain, and sun. Therefore, it is required to have good water resistance, weather resistance, and corrosion re...

AI Technical Summary

Problems solved by technology

However, the real stone paint used now generally has the problem of poor water resistance. In rainy days, after being washed by rain, the surface of the paint film will turn white, and the paint film will become loose or even peel off, which greatly affects the appearance of the building. Beautiful, and this is directly related to the performance of the real stone paint emulsion itself, so we should start with the emulsion to develop a real stone paint emulsion with good water whitening resistance