Multifunctional environment-friendly modified calcium carbonate and preparation method thereof

Abstract

The invention discloses multifunctional environment-friendly modified calcium carbonate 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 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 persulfate, 3 to 5 parts of gas-phase silicon dioxide, 2 to 3 parts of organic bentonite, 3 to 4 parts of epoxy triglyceride, 1 to 3 parts of ammonium molybdate, 2 to 4 parts of polyethylene powder, and a proper amount of deionized water. The added epoxy triglyceride, ammonium molybdate, and polyethylene powder interact with each other to strengthen the oleophylic effect of calcium carbonate surface, thus the compatibility between the modified calcium carbonate and organic substances is good, the modified calcium carbonate can be more easily dispersed in high-molecular polymer; the modified calcium carbonate can be used to fill PVC materials, the reinforcing effect is better than that of common calcium carbonate, the modified calcium carbonate is environment-friendly and safe, and has a good application effect in various fields, and thus the modified calcium carbonate is worthy to promote.

Description

technical field [0001] The invention relates to the field of industrial fillers, in particular to a multifunctional environment-friendly 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 rein...

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