A kind of aqueous composite slurry and preparation method thereof

Abstract

The invention provides an aqueous composite slurry and a preparation method thereof. The water-based composite slurry provided by the invention is composed of the following components in mass ratio: 20%-50% of water; 0.1%-1.0% of wetting agent; 0.1%-0.5% of pH regulator; 0.05%-0.8% of defoamer; 1%-5% dispersant; 0.2%-3% thickener; 0.1%-0.8% anti-mildew agent; 8%-15% diatomaceous earth; 35%-60% pigment; One or more of titanium dioxide, calcium carbonate, barium sulfate, quartz powder and kip powder; the diatomite is calcined diatomite; the particle size of the diatomite is 20-40 μm; the composite slurry The pH value of the material is above 8. In the present invention, diatomite is compounded with pigments and fillers, together with wetting agent, dispersant, pH regulator, defoamer, thickener and anti-mildew bactericide, so that the slurry has excellent stability and fluidity.

Description

technical field [0001] The invention relates to the technical field of slurry, in particular to an aqueous composite slurry and a preparation method thereof. Background technique [0002] Water-based architectural coatings are a type of material commonly used in the field of building materials. The production process is roughly as follows: mix water, additives, and pigments and fillers evenly, then grind and disperse them to the required fineness through mechanical equipment, and then mix them with film-forming materials and additives. After the mixing and dispersion are uniform and meet the design index requirements, a stable coating product will be formed. [0003] With the increase of labor cost and environmental protection pressure involved in the production of water-based architectural coatings, it is increasingly difficult to meet the requirements of the market and policies by the pure manual powder-feeding paint production mode; the disorderly discharge of dust during...

AI Technical Summary

Problems solved by technology

[0007] In traditional feeding, due to the small bulk density and poor wettability of diatomite, it is not easy to be quickly stirred into the mixture by the dispersing equipment, so it takes a long time for wetting and dispersing

When making diatomite slurry alone, the concentration of the prepared product will not exceed 20% because of the light porous characteristics, high oil absorption and high water absorption of diatomite itself, and strong thixotropy will appear if the concentration is increased. , unable to flow normally; and the use of low-concentration semi-finished slurry may lead to excess moisture and additives in the overall coating formulation, affecting the performance of the coating formulation

[0008] If different types of powder are compounded to prepare composite water-based semi-finished slurry, the investment in equipment can be reduced, and the problems of unbalanced output of a single slurry and low utilization of equipment can be solved.

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