Emulsion for real stone paint and real stone paint using the emulsion as film-forming substance

Abstract

The invention discloses styrene-acrylate copolymer seed emulsion. The emulsion is prepared from styrene serving as a monomer component, methyl methacrylate and butyl acrylate with the existence of reaction type emulsifier, non- reaction type emulsifier and water. The invention further provides a method for preparing the emulsion for stonelike paint from a monomer mixture composed of acrylic acid (AA), methacrylic acid (MAA), butyl acrylate (BA), methyl methacrylate (MMA), acrylic acid 2- ethylhexyl acrylate (EHA) and crosslinking monomer with the existence of the seed emulsion. The invention further provides the stonelike paint containing colored sand and the emulsion.

Description

technical field [0001] The invention relates to an emulsion for real stone paint and real stone paint using the emulsion as a film-forming substance. Background technique [0002] Because of its natural color and strong texture, real stone paint gives people an elegant, harmonious and solemn aesthetic feeling. Therefore, real stone paint has become the mainstream of exterior wall painting at present. Whether the real stone paint can be durable and can keep the natural color forever, the key technology is the acrylate copolymer emulsion binder. The performance of the emulsion determines the color retention of the real stone paint after it encounters water, and determines the water resistance of the paint film. properties, the yellowing resistance of the paint film. At present, the high-performance real stone paint emulsion has been monopolized by foreign companies, such as Japan's Showa, and the price is as high as 14,000 yuan / ton. Many well-known professional manufacturers...

AI Technical Summary

Problems solved by technology

Many well-known professional manufacturers of architectural emulsions in China, including polyjia, Badefu, Beijing Donglian Chemical Co., Ltd., Jiangsu Sunrise also sell corresponding products. Changes and hardness build-up speed have not been completely resolved, even the companies mentioned above still have the problem of unsatisfactory comprehensive performance

[0003] The traditional real stone paint emulsion uses general-purpose non-reactive small-molecule emulsifiers as polymeric emulsifiers. These non-polymeric emulsifiers are partially enriched on the surface of the paint film and remain inside the paint film after film formation, and are easy to form after absorbing water. The dispersion of water droplets turns white. Another disadvantage of traditional real stone paint emulsions is that the hardness builds up for a long time. Even if the Tg of the copolymer is designed to be high, the reason is that the surface of the polymer particles is not hydrophilic enough, and the paint film cannot be dried. caused by

[0004] The well-known emulsion manufacturers at home and abroad are solving the above problems by using methacrylic acid as the hydrophilic comonomer, and at the same time adding a mixture of hard monomers with high hydrophilicity in the later stage of polymerization to improve the outer layer. The hydrophilicity and hardness of the polymer are designed, but the reproducibility of this method is poor, because it is easy to cause homogeneous nucleation, resulting in a bimodal distribution of particle size, and particles composed of two monomers appear at the same time

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