Microgel aqueous acrylic acid shell-core resin emulsion and preparation method thereof

Abstract

The invention belongs to the field of aqueous coatings, and relates to a microgel aqueous acrylic acid shell-core resin emulsion. The resin emulsion is prepared through a reaction of 13-16 parts of an acrylic acid resin water dispersion (with the solid content of 28-34%), 18-21 parts of a vinyl monomer, 20.5-27.6 parts of an acrylic acid and acrylate monomer, 0.3-0.6 parts of an initiator, 5-6 parts of an organic solvent and 49-53 parts of water. The microgel resin emulsion is added to an aqueous coating, so the sagging property of a paint film is obviously improved, a good anti-sagging effect is reached, the thickness of the paint film in closed angles or edges and other difficult coating positions of a coated member is obviously increased, and the corrosion resistance of the surface of the coated member is improved. The nanometer-level aqueous acrylic acid emulsion with the particle size being smaller than 150nm is produced through the method, can be added to the aqueous coating without thickening the coating, and facilitates maintenance of high construction solid content.

Description

technical field [0001] The invention relates to a microgel water-based acrylic shell-core resin emulsion and a preparation method thereof, belonging to the field of water-based paints. Background technique [0002] Water-based coatings use water instead of solvents, which can greatly reduce VOC emissions from about 70% of solvent-based paints to less than 15%. Its environmental acceptability is much higher than that of solvent-based paints, and it saves oil. resources, reduce fire hazards, and improve the operating environment. [0003] The anti-sagging performance of water-based coatings is a very important performance in the process of construction and film formation. If this performance is poor, it will lead to the aesthetics and continuity of the coating on the surface of the object, resulting in the failure of coating protection and aesthetic performance. . At present, the main way to improve the sag resistance of water-based paints is to add various types of thickene...

AI Technical Summary

Problems solved by technology

[0003] The anti-sagging performance of water-based coatings is a very important performance in the process of construction and film formation. If this performance is poor, it will lead to the aesthetics and continuity of the coating on the surface of the object, resulting in the failure of coating protection and aesthetic performance.

At present, the main way to improve the sag resistance of water-based paints is to add various types of thickeners to change the rheological properties of water-based paints, but the following side effects will occur: more water should be added during the construction process to reduce the viscosity of the system, Therefore, the construction solid content of the coating is reduced; in addition, due to the hydrophilic nature of the thickener, the water resistance of the coating film will also be reduced; the addition of the thickener will reduce the gloss and reduce the aesthetics of the coating film, etc.

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