Associative thickening vac-veova emulsion and preparation method thereof

Abstract

The invention discloses an associative thickening vac-veova emulsion and a preparation method thereof, and belongs to the technical field of research and development of architectural coatings; the vac-veova emulsion comprises the following components by the mass percentages: 40-50% of water, 1-3% of an emulsifier, 30-40% of vinyl acetate, 5-15% of butyl acrylate, 5-15% of tertiary carbonic ester VV-10, 0-1% of acrylic acid, 1-20% of an associative thickening monomer, and 0.5-2% of persulfate. The method includes the steps: pre-emulsifying a portion of water, a portion of the emulsifier and other components except persulfate; dissolving a portion of persulfate in water; taking and adding the balance of water and the balance of the emulsifier into a reaction kettle, and then putting the emulsified liquid as a seed for reaction; then adding a part of the remaining sulfate, at the same time, dropping the rest of the persulfate and the emulsified liquid, controlling the temperature and carrying out heat preservation; and post-processing. The prepared vac-veova emulsion can form a dense associative network structure and effectively improves the medium and high shear viscosity of a coating.

Description

technical field [0001] The invention belongs to the technical field of research and development of architectural coatings, and relates to an associative thickened tertiary vinegar emulsion and a preparation method thereof. Background technique [0002] For a long time, improving high-shear viscosity and balancing leveling and sagging have been difficult problems for architectural coatings, which are directly related to the construction performance of coatings. Generally, emulsions cannot form a firm associative thickening network structure in the coating system, and are easily destroyed at high shear rates, and the viscosity drops rapidly, which is not conducive to the construction of water-based coatings and is easy to sag. To solve this problem, the method of increasing the amount of thickener is usually used, but this method will cause the low-shear viscosity to be too high, which is not conducive to the leveling of the paint. In addition, too many thickeners introduce o...

AI Technical Summary

Problems solved by technology

Generally, the emulsion cannot form a firm association thickening network structure in the coating system, and it is easy to be quickly destroyed at a high shear rate, and the viscosity drops rapidly, which is not conducive to the construction of water-based coatings and is easy to sag

In order to solve this problem, the method of increasing the amount of thickener is usually used, but this method will cause the low-shear viscosity to be too high, which is not conducive to the leveling of the paint

In addition, too many thickeners introduce other small molecular substances into the overall paint product, which will have a negative impact on other properties of the paint film, such as scrub resistance and water resistance.

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