ã€China Aluminum Industry Network】 The use of ultra-fine aluminum silicate to replace part of the titanium dioxide powder is a commonly used technology in the coatings industry at home and abroad, and it has obvious economic benefits. Here are some of the roles played by ultra-fine aluminum silicate in coatings:
1. Improve the whiteness of the paint.
Superfine aluminum silicate replaces part of the titanium dioxide, not only will not change the dry film hiding power of titanium dioxide, but also improve the whiteness of the paint. If the amount of titanium dioxide is not changed, the dry film hiding power will be significantly increased, and the whiteness will be greatly increased.
2, with the role of buffer PH value.
Ultrafine aluminum silicate PH value range is 9.7-10.8, with a pH buffering effect. Especially in the storage process of vinyl acetate emulsion paint, the phenomenon that the pH value is lowered due to the hydrolysis of vinyl acetate can be prevented, the dispersion stability of the latex paint is increased, and the inner wall of the metal container is protected from corrosion.
3, make latex paint has good suspension.
The ultra-fine and grid structure of aluminum silicate makes the latex paint system slightly thickened, has good suspensibility, and prevents the occurrence of solids sinking and surface water separation.
4, enhance latex scrub resistance, weather resistance.
Ultra-fine aluminum silicate makes latex paint film has good scrub resistance, weather resistance, and can shorten the dry time.
5, with extinction effect.
Ultrafine aluminum silicate has a matting effect, so it can be used as an economical matting agent in semi-gloss and matt paint, and should not be used in glossy paints.
PS: Ultra-fine aluminum silicate must be dispersed evenly in order to show better synergistic effect, otherwise it may make the latex paint thicken.
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