Wollastonite powder is used in latex paint, and a large amount of titanium dioxide is saved without the performance of the latex paint decreasing, and the cost is reduced. The advantage of the present invention is that the wollastonite powder, which is selected from the dispersant without chemical treatment, is directly used in the latex paint, thereby avoiding the pretreatment of the wollastonite powder and greatly reducing the coating cost.

        Using 320 mesh wollastonite powder instead of 30% titanium dioxide, the cost reduction of latex paint ranges from 130 to 200 yuan (RMB) / ton.

        After wollastonite is pulverized to a certain particle size, it can replace part of the titanium dioxide in the coating. The main disadvantage is that the coating is unstable and prone to precipitation. The invention directly crushes natural wollastonite without chemical pretreatment and directly uses it in latex paint instead of 10 to 40% of titanium dioxide. By adding a mixture of a dispersant polyacrylate and sodium hexametaphosphate, this type is guaranteed. The stability of the latex paint reduces costs. The weather resistance of latex paint has been improved, and other properties are not reduced.

        In the application of exterior wall latex paints, wollastonite has high hardness, Mohs hardness of 4.5 to 5, low thermal expansion coefficient, belongs to inert fillers, has good weather resistance, its needle structure has crack resistance, high whiteness, and good tinting power. When the color is bright, it is increasingly used as an important filler in exterior coatings.

        In the application of interior wall latex paint, wollastonite was originally used because of its yellowish hue, and it has not been widely used in interior wall latex paint. With the advancement of deep processing technology of wollastonite production enterprises, the whiteness can reach more than 90, Jiangxi Aote Technology Co., Ltd. wollastonite whiteness can reach more than 90) can be used for interior wall coatings.

        Wollastonite needle-like structure can increase the porosity of PVC interior wall latex paint and improve hiding power. The acicular structure of wollastonite can help the scrub resistance. According to information, adding 5-8% wollastonite to the interior wall emulsion paint can improve the scrub resistance 100 times. In addition, the acicular structure of wollastonite can reduce side angle light, improve calender resistance, and improve construction performance.