Modified calcium carbonate having good water-repellent oleophilic moisture-proof effects and preparation method thereof

Abstract

The invention discloses modified calcium carbonate having good water-repellent oleophilic moisture-proof effects and a preparation method thereof. The modified calcium carbonate is characterized by being prepared from, by weight, 100-150 parts of calcium carbonate, 30-50 parts of sodium oleate, 0.3-0.7 part of sodium dodecyl benzene sulfonate, 1-3 parts of sodium bicarbonate, 4-8 parts of styrene, 0.02-0.05 part of potassium persulfate, 3-5 parts of gas phase silica, 2-3 parts of organic bentonite, 1-2 parts of homo-polypropylene, 2-4 parts of nano iron slag, 1-2 parts of palmitic acid isopropyl ester and an appropriate amount of deionized water. The added nano iron slag, the added homo-polypropylene and the added palmitic acid isopropyl ester produce mutual effects to enable calcium carbonate powder to have good water-repellent, oleophilic, moisture-proof, mechanical and impact-resisting characteristics, and the modified calcium carbonate has very good strengthening effect when serving as a packing, improves the quality of a product and is wide in application field and worthy of popularization.

Description

technical field [0001] The invention relates to the field of industrial fillers, in particular to a modified calcium carbonate with good hydrophobic, lipophilic and moisture-proof effects 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 o...

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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