Highly-dispersed precipitated barium sulfate and preparation method thereof

Abstract

The invention belongs to the field of metal barium compounds, in particular relates to highly-dispersed precipitated barium sulfate used on automobile plastic parts and a preparation method thereof. The preparation method comprises the following steps: a, barite with a barium content of more than 95 percent is selected, washed and aired; b, the aired barite is crushed and then milled on a Raymondmill, thereby enabling the fineness of the barite to reach up to more than 400 meshes and acquiring A; c, polyacrylic acid sodium salt dispersant, sericite powders and allyl phenoxyacetate are added to the A, then the A is ground through a sand mill, and the mixture is dried and crushed into B after the particle diameter of the mixture is smaller than or equal to 1.2mu.m; and d, calcium carbonate, titanium dioxide and allyl phenoxyacetate are added to the B and sufficiently mixed with the B, and then a product is acquired. Compared with the prior art, the highly-dispersed precipitated barium sulfate disclosed by the invention has the advantages of small fineness, high dispersibility, low cost, and little pollution to the environment in the production process.

Description

technical field [0001] The invention belongs to the field of metal barium compounds, in particular to a high-dispersion precipitated barium sulfate used for automobile plastic parts and a preparation method thereof. Background technique [0002] Precipitated barium sulfate (English name: pre-cipitated barium sulfate) is widely used as a raw material or filler for paints, inks, plastics, advertising pigments, cosmetics, and storage batteries. It is used as both a filler and a reinforcing effect in rubber products. Used as filler and weighting agent in ethyl chloride resin, surface coating agent for printing paper and coated paper, and sizing agent for textile industry. Glass products are used as clarifiers, which can defoam and increase gloss. The existing preparation method is generally to mix the barium sulfide solution with the Glauber’s salt solution after removing calcium and magnesium, react at 80°C to form a precipitate, and adjust the pH value to 5-6 after suction fi...

AI Technical Summary

Problems solved by technology

However, the existing precipitated barium sulfate consumes a lot of raw materials in the production process, and may produce harmful substances to the body, causing pollution, which is not conducive to environmental protection, and the product cost is relatively high.

[0003] For example, the Chinese invention patent application with application number CN200810048340.6 provides a preparation method of precipitated barium sulfate, which is to add a nano-scale filter cloth to filter the traditional preparation method to obtain a refined solution, and then combine and separate, adjust acid, dry, Evaporation, the main content of barium sulfate in the product increased from 98% to 98.6-99%, and the finished particles reached 900-1000 mesh, NA 2 The iron content of S products is below 30PPM, but the process is very complicated, and harmful substances need to be added in the production process, which is not conducive to environmental protection and high production costs

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