Modified calcium carbonate with good heatproof property and preparation method thereof

Abstract

The invention discloses modified calcium carbonate with a good heatproof property and a preparation method thereof. The modified calcium carbonate is characterized by being prepared from the following raw materials in parts by weight: 100 to 150 parts of calcium carbonate, 30 to 50 parts of sodium oleate, 0.3 to 0.7 parts 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 persulfate, 3 to 5 parts of gas-phase silicon dioxide, 2 to 3 parts of organic bentonite, 3 to 4 parts of quartz powder, 1 to 2 parts of alum, 1 to 2 parts of terpineol, and a proper amount of deionized water. The added quartz powder, alum, and terpineol cooperate with each other to improve the properties of calcium carbonate powder such as heatproof property, antibacterial property, fireproof performance, mechanical strength, and the like. The modified calcium carbonate can be used as filler and applied to the fields such as paints, construction, pigments, and the like. Moreover, the preparation technology is simple, the cost is low, and the modified calcium carbonate can be massively produced and is worthy to promote.

Description

technical field [0001] The invention relates to the field of industrial fillers, in particular to a modified calcium carbonate with good heat resistance 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 eff...

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