A batch-scratch type water-in-sand multi-color paint and preparation method thereof

Abstract

The invention relates to a batch-scraping sand-in-water multi-color coating for building exterior walls, which is characterized in that it is prepared from the following components by mass: 55-65 parts of toning base paint; 20-65 parts of granulation protective glue 30 parts; continuous phase emulsion 15‑25 parts. The present invention introduces hydrophilic enoate groups on the polyvinyl alcohol molecular chain, which leads to the improvement of the color point strength in the batch scraping type water-in-sand multi-color paint prepared by the present invention; and the obtained target of the present invention The composition also has a series of desired features such as complete color point state, high paint film hardness, no loss of adhesion after soaking in water, and good thermal storage stability.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a batch-scraping sand-in-water multi-color coating and a preparation method thereof. Background technique [0002] Colorful paint is a kind of paint that can evenly combine color dots of different colors, sizes and shapes, and through a one-time spraying construction method, so as to imitate the texture and effect of natural stone such as liquid granite and marble. After decades of development in China, colorful paints are becoming more and more popular in the field of building exterior wall decoration because of their high-end decorative effects and lifelike simulation. They are essentially different from traditional latex paints; but they also have with its own flaws. [0003] At present, the colorful paint has the following shortcomings in the actual construction process: (1) the colorful paint can only be sprayed with a high-pressure spray gun at present, the construction method is s...

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Problems solved by technology

[0003] At present, the colorful paint has the following shortcomings in the actual construction process: (1) the colorful paint can only be sprayed with a high-pressure spray gun at present, the construction method is single, and the pressure in the tank of the high-pressure spray gun is difficult to adjust, the pressure is too high, and the colored spots are fragile , the pressure is insufficient, the color dots are difficult to spread and blend, which affects the degree of simulation; (2) The requirements for construction personnel are relatively high, and the construction personnel are required to have skilled spraying techniques and gun adjustment capabilities, otherwise it is easy to appear uneven density of sprayed color dots, color dots (3) The construction cost is high. At present, the labor cost of colorful construction is more than 3 times that of real stone paint

However, the grinding process of polyvinyl alcohol for batch-scratch multi-color paint prepared by this method is relatively complicated, and it is difficult to expand and apply it to large-scale production; and polyvinyl alcohol is difficult to fully dissolve in water under normal temperature conditions, resulting in the gap between the hydroxyl group on the molecular chain and the protective colloid. The complexation reaction between them is not sufficient, so the toughness of the colored dots is not strong; in addition, the disclosed invention of the prior art uses the technology of grinding to prepare batch scraped multicolored paints, which can only be applied to flat multicolored paints with less fineness. Sand-in-water multi-color coatings cannot be prepared by this method, which has certain technical limitations

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