Styrene-coated modified calcium carbonate and preparation method thereof

Abstract

The invention discloses styrene-coated modified calcium carbonate and a preparation method thereof. The styrene-coated modified calcium carbonate is characterized by being prepared from the following raw materials by weight: 100 to 150 parts of calcium carbonate, 30 to 50 parts of sodium oleate, 0.3 to 0.7 part of sodium dodecyl benzene sulfonate, 1 to 3 parts of sodium bicarbonate, 4 to 8 parts of styrene, 0.02 to 0.05 part of potassium persulphate, 3 to 5 parts of fused silica, 2 to 3 parts of organic bentonite, 1 to 2 parts of magnesium laurate, 3 to 4 parts of meerschaum fiber, 3 to 5 parts of coconut shell charcoal and a proper amount of deionized water. According to the invention, the added magnesium laurate, meerschaum fiber and coconut shell charcoal interact to promote adsorptivity, resistance to acidic and alkaline corrosion, heat insulation and radiation resistance of calcium carbonate; and the prepared modified calcium carbonate has good dispersibility, heat insulation performance and corrosion resistance and is capable of reducing cost and improving various processing performances and service life of products when applied to a variety of materials.

Description

technical field [0001] The invention relates to the field of industrial fillers, in particular to a styrene-coated modified calcium carbonate and a preparation method thereof. Background technique [0002] As a filler for rubber and plastic products, calcium carbonate can improve the heat resistance, wear resistance, dimensional stability, rigidity and processability of the product, and reduce the cost of the product, but its surface has hydroxyl groups with strong hydrophilicity. It presents a strong alkalinity. This hydrophilic and oleophobic property makes the affinity between calcium carbonate and organic polymers poor, and it is easy to form aggregates, resulting in uneven dispersion in the polymer, resulting in two materials. The effect of direct application is not good, and calcium carbonate is used as a filler, and its acid resistance, smoothness, whiteness and other properties need to be further improved. Therefore, in order to improve the reinforcing effect of calc...

AI Technical Summary

Problems solved by technology

[0002] As a filler for rubber and plastic products, calcium carbonate can improve the heat resistance, wear resistance, dimensional stability, rigidity and processability of the product, and reduce the cost of the product, but its surface has hydroxyl groups with strong hydrophilicity. It presents a strong alkalinity. This hydrophilic and oleophobic property makes the affinity between calcium carbonate and organic polymers poor, and it is easy to form aggregates, resulting in uneven dispersion in the polymer, resulting in two materials. The effect of direct application is not good, and calcium carbonate is used as a filler, and its acid resistance, smoothness, whiteness and other properties need to be further improved. Therefore, in order to improve the reinforcing effect of calcium carbonate and the dispersion performance in composite materials And the physical properties of modified calcium carbonate filled composite materials, it is necessary to use different surface modifiers and treatment methods to modify the surface of calcium carbonate powder, thereby broadening the application field of calcium carbonate