The role of calcium carbonate in latex paint:
As a body pigment, it has filling function, making it delicate, even and high whiteness.
With certain dry covering power, ultra-fine products are generally used. When the particle size of titanium dioxide is close to that of titanium dioxide, the covering effect of titanium dioxide can be improved.
Can improve the strength of the film, water resistance, dry, scrub resistance.
Reduce cost and use 10%-50%.
For example, the superfine heavy calcium carbonate powder material has obvious effects on shortening the time of dispersion sanding in the process of latex paint production, improving the hiding power, improving the viscosity of latex, reducing the amount of titanium white powder and improving the polishing performance of putty.
In the design of the coating formula, the high-performance emulsion paint uses superfine calcium carbonate, low grade emulsioni paint selection of relatively coarse particle size, low oil absorption value of heavy calcium.
At present, the application effect of heavy calcium carbonate powder in interior wall latex paint is better, its particle size control d97 < 10 m, d50 about 1.5 m, whiteness > 95%, CaCO3≥98%.
PUDA Calcium carbonate packing machine:
Calcium carbonate is the most widely used pigment in paint, which plays the role of filling frame and substrate in paint film and improving the performance of paint.
In putty powder, 70-80% is heavy calcium.
In thick paint, calcium carbonate dosage is generally above 30%;
In waterborne coatings, the calcium carbonate content is 20-60%;
Calcium carbonate is an ideal matting filler for finish paints. For example, matte white casework wall paint contains 11.5% heavy calcium carbonate.
In metal antirust coating, calcium carbonate has certain antirust effect, the appropriate amount is about 30%;
Generally, 16%-20% of light calcium carbonate is contained in polyvinyl alcohol paint such as 106 and 803.
Interior finishes, such as polyvinylidene emulsion paint, usually contain about 10% calcium carbonate.
