Modified calcium carbonate with good mildew-resistant and insect-preventing effects and preparation method thereof

Abstract

The invention discloses modified calcium carbonate with good mildew-resistant and insect-preventing effects and a preparation method thereof. The 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 3 parts of eucalyptus oil, 0.4 to 1 part of geramine, 3 to 5 parts of diatomite and a proper amount of deionized water. According to the invention, the added eucalyptus oil, geramine and diatomite have natural bactericidal, mildew-resistant and insect-preventing effects, can greatly enhance bactericidal, mildew-resistant and insect-preventing effects of calcium carbonate when mixed with calcium carbonate and enable the modified calcium carbonate to be easy to store; and through mixing of surfactants with a plurality of functions, surface energy and interfacial tension of particles are greatly reduced, auto-agglutination of micronized particles can be effectively prevented, and the modified calcium carbonate has improved compatibility and dispersibility in plastic and rubber, good mildew-resistant, insect-preventing and bactericidal properties and wide application prospect and is worth popularization.

Description

technical field [0001] The invention relates to the field of industrial fillers, in particular to a modified calcium carbonate with good anti-mold and insect-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 order to improve ...

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