Modified calcium carbonate good in flame retardant effect and preparing method of modified calcium carbonate

Abstract

The invention discloses modified calcium carbonate good in flame retardant effect and a preparing method of the modified calcium carbonate. 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 fumed silica, 2-3 parts of organic bentonite, 2-3 parts of magnesium stearate, 2-3 parts of asbestos fiber, 2-4 parts of antimonous oxide and a proper amount of deionized water. Due to the fact that zinc stearate, the asbestos fiber and the antimonous oxide are added, the effects that the calcium carbonate is not likely to stick to a mold and is good in self-lubrication property are enhanced when the calcium carbonate serves as packing, the calcium carbonate is not likely to burn, and the flame retardant performance of a product is improved. The prepared calcium carbonate powder is good in dispersity, not prone to aggregating or settling, good in comprehensive performance, good in applicability when serving as paint, plastic, pigments and other packing 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 flame-retardant effect 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 reinforc...

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