Wear-resistant surface modified calcium carbonate filler and preparation method thereof

Abstract

The invention discloses a wear-resistant surface modified calcium carbonate filler and a preparation method thereof. The filler 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, 0.5-2 of an aluminate coupling agent, 3-5 of silicon carbide, 2-3 of grapheme, and a proper amount of deionized water. The silicon carbide and graphene added in the invention bond closely with calcium carbonate under the action of the aluminate coupling agent, and enhances the wear resistance, oxidation resistance, high hardness, good tensile strength and other characteristics of calcium carbonate. The wear-resistant surface modified calcium carbonate filler provided by the invention has reasonable formula and simple process, the prepared calcium carbonate filler has excellent performance in all aspects, is suitable for use as an additive of paint and building materials, and endows the product with wear resistance, better durability and longer service life.

Description

technical field [0001] The invention relates to the field of industrial fillers, in particular to a wear-resistant surface-modified calcium carbonate filler 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, stiffness and processability of the product, and reduce the cost of the product, but its surface has strong hydrophilic hydroxyl groups. It exhibits strong alkalinity. This hydrophilic and oleophobic property makes calcium carbonate have poor affinity with organic polymers, and it is easy to form aggregates, resulting in uneven dispersion in the polymer, resulting in two materials. There are interface defects, the direct application effect 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 ...

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