The role of aluminum silicate in coatings

The role of aluminum silicate in coatings includes the following five points:

1. Superfine aluminum silicate replaces part of titanium dioxide, its dry film hiding power will not change, and it can improve the whiteness of the paint. If the amount of titanium dioxide is not changed, the dry film hiding power is obviously improved, and the whiteness is greatly improved.

2. The pH value of ultra-fine aluminum silicate is in the range of 9.7-10.8, which has a pH buffering effect. In particular, in the storage of vinyl acetate emulsion paint, the phenomenon of pH drop 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, the ultra-fine, grid structure of aluminum silicate makes the latex paint system slightly thickened, has a good suspensibility, and prevents the occurrence of solids sinking and surface water separation phenomenon.

4, ultra-fine aluminum silicate latex paint has a good scrub resistance, weather resistance kc6zhl, in addition to shorten the dry time.

5, ultra-fine aluminum silicate extinction effect, so in the semi-gloss, matt paint can be used as an economic matting agent, should not be used in glossy paint.

Note: Ultra-fine aluminum silicate must be dispersed evenly in order to show the best synergistic effect, otherwise it may make latex paint thickened. Replacing part of the titanium dioxide with ultra-fine aluminum silicate is a commonly used technology in the coating industry at home and abroad, and has obvious economic benefits. The suitable amount of ultrafine aluminum silicate in the matt, semi-gloss paint is 15-25% of the amount of titanium dioxide (4-6% of the total coating), but the amount of substitution for different formulations is also different. It is recommended for each user. Before the application of some small test, in order to maximize the replacement of the amount of titanium dioxide without affecting the film hiding power to achieve the best results.