High fluidity modified calcium carbonate for plastics and preparation method thereof

Abstract

The invention discloses a high fluidity modified calcium carbonate for plastics and a preparation method thereof. The high fluidity modified calcium carbonate is characterized by being prepared from the following raw materials by weight part: 100-150 of calcium carbonate, 30-50 of sodium oleate, 0.3-0.7 of sodium dodecyl benzene sulfonate, 1-3 of sodium bicarbonate, 4-8 of styrene, 0.02-0.05 of potassium persulfate, 3-5 of fumed silica, 2-3 of organic bentonite, 0.4-1 of dioctyl phthalate, 1-2 of pregelatinized starch, 1-3 of zinc stearate, and a proper amount of deionized water. The dioctyl phthalate, pregelatinized starch and zinc stearate added in the invention can enhance the self-lubrication and fluidity of calcium carbonate, can reduce material loss during processing, also can enhance the toughness and hardness of plastics, and improve the quality of plastic parts. The high fluidity modified calcium carbonate for plastics provided by the invention has the advantages of simple preparation method, convenient raw material sources, and low cost, and has the effect of reinforcing all performance of products as an industrial filler, thus being worth popularizing.

Description

technical field [0001] The invention relates to the field of industrial fillers, in particular to a high-fluidity modified calcium carbonate for 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 the reinforcing ef...

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