Modified calcium carbonate with heat insulation and heat preservation effects and preparation method thereof

Abstract

The invention discloses modified calcium carbonate with heat insulation and heat preservation effects and a preparation method thereof. The modified calcium carbonate is prepared from 100-150 parts by weight of calcium carbonate, 30-50 parts by weight of sodium oleate, 0.3-0.7 parts by weight of sodium dodecyl benzene sulfonate, 1-3 parts by weight of sodium bicarbonate, 4-8 parts by weight of styrene, 0.02-0.05 parts by weight of potassium persulphate, 3-5 parts by weight of fumed silica, 2-3 parts by weight of organic bentonite, 1-2 parts by weight of aluminum sulfate, 2-4 parts by weight of polyoxyethylene, 1-1.5 parts by weight of cetanol and a proper amount of deionized water. Through interaction of aluminum sulfate, polyoxyethylene and cetanol, heat insulation, heat preservation and erosion resistance of calcium carbonate are greatly promoted. The modified calcium carbonate is superior to unmodified calcium carbonate, and obviously improves calcium carbonate use performances such as tensile property and rigidity in a polymer. The modification method is simple and environmentally friendly. Compared with the existing product, the product obtained by the preparation method has higher performances and a good application prospect and is suitable for large scale production.

Description

technical field [0001] The invention relates to the field of industrial fillers, in particular to a modified calcium carbonate with heat insulation function 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 reinforcin...

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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