Modified calcium carbonate capable of reinforcing plastic strength and preparation method therefor

Abstract

The present invention discloses a modified calcium carbonate capable of reinforcing plastic strength and a 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, 2-4 parts of dimethyl silicone oil, 3-5 parts of brown corundum powder, 0.6-1.4 parts of boric acid ester coupling agent, and an appropriate amount of deionized water. According to the present invention, the added dimethyl silicone oil and brown corundum powder has a good cohesiveness with the calcium carbonate powder under an effect of the boric acid ester coupling agent, and therefore the strength, the hardness, the fire resistance and the fire-proof property of the calcium carbonate powder are reinforced, and when the modified calcium carbonate is used as a filler of a plastic material, the modified calcium carbonate has a reinforcing effect, which can greatly improve the property of the plastic, 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 capable of enhancing the strength of plastics 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