A kind of microgel aqueous acrylic shell core resin emulsion and preparation method thereof

Abstract

The invention belongs to the field of water-based paint, which is a microgel water-based acrylic shell-core resin emulsion. The resin emulsion consists of 13-16 parts of acrylic resin aqueous dispersion (solid content 28-34%), 18-21 parts of vinyl monomer, 20.5-27.6 parts of acrylic acid and ester monomer, 0.3-0.6 part of initiator, organic 5-6 parts of solvent and 49-53 parts of water are obtained by reaction. The invented microgel resin emulsion is added to the water-based paint, which can obviously improve the sag property of the paint film, has a good anti-sag effect, and can make the sharp corners or edges of the coated samples difficult to be painted The thickness of the paint film in the place is obviously increased than before, which improves the corrosion resistance of the surface of the coated part. However, the invention produces a nano-scale water-based acrylic emulsion with a particle size of less than 150nm. Adding the water-based paint will not thicken the paint, which is conducive to maintaining a higher 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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