Single-component water-based silicon-fluorine modified acrylate emulsion wood lacquer and preparation method thereof

Abstract

The invention discloses a single-component water-based silicon-fluorine modified acrylate emulsion wood lacquer and a preparation method thereof. The preparation method comprises the following steps: S1, weighing a certain amount of water, an emulsifier, butyl acrylate, methyl methacrylate, acrylonitrile, styrene, acrylic acid and hydroxyethyl methylacrylate; S2, mixing the raw materials to obtain a pre-emulsion A; S3, mixing a part of the pre-emulsion A, vinyl triisopropoxy silane and a silicon-fluorine modified resin to obtain an organic silicon-fluorine pre-emulsion B; S4, mixing water, part of the pre-emulsion A, ammonium persulfate and sodium bicarbonate to obtain a solution, heating the solution to 80-85 DEG C, and stirring until the solution presents blue light; S5, adding an ammonium persulfate aqueous solution and the pre-emulsion A, adding the organic silicon-fluorine pre-emulsion B after the pre-emulsion A is added, then heating to 85-90 DEG C, keeping the temperature for 2-3 hours, then cooling to 65-70 DEG C, adding tert-butyl hydroperoxide and sodium erythorbate, and keeping the temperature for 0.5-1 hour; and S6, cooling to room temperature, adding a preservative and a defoaming agent, and then adjusting the pH value to 7-8 to obtain a finished product.

Description

technical field [0001] The invention relates to the field of water-based paints, in particular to a one-component water-based silicon-fluorine modified acrylate emulsion wood paint and a preparation method thereof. Background technique [0002] Wood plays an increasingly important role in our daily production and life. With the development of society, people put forward higher requirements for wood, such as waterproof, anti-fouling, and weather resistance. Studying the waterproof performance of water-based wood coatings has guiding significance for improving the added value of wood and expanding the application range of wood. [0003] Most of the wood paints currently on the market are oil-based paints, but oil-based paints have problems such as pollution and a large demand for organic solvents. Compared with oil-based wood lacquers, water-based wood lacquers are non-toxic, tasteless, and non-polluting. Therefore, the development and maturity of water-based wood lacquers is...

AI Technical Summary

Problems solved by technology

[0006] Now the common preparation method of water-based wood paint is: adding water, additives, pigments, etc. to the water-based wood paint emulsion, stirring evenly and then thickening The biggest influence on the water-based wood paint film is the performance of its emulsion. Since the film-forming mechanism of water-based paint emulsion is very different from that of oil-based paint, the performance of the emulsion after film formation is generally not as good as that of oil-based paint. Problems such as soft film, poor hardness, poor wear resistance, etc.

[0007] In the prior art, in order to modify the water-based wood lacquer, the prepared nano-slurry is usually added during the paint let-down process. In this nano-water-based wood lacquer The nanoparticles and the emulsion particles do not form a good bond, although the coating film of the water-based paint can be initially strengthened, and the compactness of the coating film, water resistance and other properties can be improved, but the nano-water-based wood paint obtained in this method The storage is unstable, and the nanoparticles migrate and agglomerate during the film forming process, which leads to problems such as uneven distribution in the coating film, so that some properties of nano water-based wood coatings are not well reflected, so they have not been well promoted.

[0008] In summary, a kind of wood lacquer is needed to solve the problems of soft film, poor hardness and poor wear resistance of the existing water-based acrylic wood lacquer. question

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