Modified calcium carbonate with good electrical conductivity and preparation method therefor

Abstract

The present invention discloses a modified calcium carbonate with a good electrical conductivity and preparation method therefor. The modified calcium carbonate is characterized of being prepared by the following raw materials in parts by weight: 100-150 parts of calcium carbonate, 30-50 parts of sodium oleate, 0.3-0.7 parts of sodium dodecyl benzene sulfonate, 1-3 parts of sodium bicarbonate, 4-8 parts of styrene, 0.02-0.05 parts of potassium persulfate, 3-5 parts of fumed silica, 2-3 parts of organobentonite, 3-5 parts of artificial graphites, 2-3 parts of polydimethylsiloxane, 2-4 parts of conductive carbon black, and an appropriate amount of deionized water. According to the calcium carbonate provided by the present invention, the added artificial graphites, polydimethylsiloxane and conductive carbon black promote an excellent and durable electrical conductivity of the calcium carbonate, so that a plastic material uses the calcium carbonate is provided with a high cracking resistance, pressure resistance and stablility, and the material has an improved corrosion resistance, a prolonged service life, a simple preparation process, can be mass produced, and has a wide application prospect.

Description

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

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