Anti-aging effect enhanced modified calcium carbonate and preparation method therefor

Abstract

The invention discloses anti-aging effect enhanced modified calcium carbonate and a preparation method therefor. The anti-aging effect enhanced modified calcium carbonate is characterized by being prepared from the following raw materials in parts by weight: 100-150 parts of calcium carbonate, 30-50 parts of sodium oleate, 0.3-0.7 part of sodium dodecylbenzene sulfonate, 1-3 parts of sodium bicarbonate, 4-8 parts of styrene, 0.02-0.05 part of potassium persulfate, 3-5 parts of aerosil, 2-3 parts of organobentonite, 1-3 parts of silane coupling agent kh560, 1-2 parts of straw ash, 2-4 parts of PVC (Polyvinyl Chloride) waste powder and a proper volume of deionized water. According to the anti-aging effect enhanced modified calcium carbonate and the preparation method therefor, the added silane coupling agent kh560, straw ash and PVC waste powder are subjected to waste recycling, so that the modified calcium carbonate is energy-saving and environment-friendly, and resources are saved; due to matched use, properties such as aging resistance, weather resistance, oil resistance, corrosion resistance and the like of the modified calcium carbonate are greatly enhanced; and the modified calcium carbonate disclosed by the invention has good organic substance compatibility, is good in performance of all aspects and is stable in quality. The modified calcium carbonate is low in production cost and is suitable for serving as various industrial fillers.

Description

technical field [0001] The invention relates to the field of industrial fillers, in particular to a modified calcium carbonate with enhanced anti-aging 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. Calcium carbonate is widely used in the fiel...

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. Calcium carbonate is widely used in the field of plastics, and generally adding dispersants to plastics reduces The agglomeration of nanoparticles improves the dispersibility, but the temperature range of nano-calcium carbonate becomes smaller due to the addition of dispersants. The reason is that commonly used dispersants are easy to decompose at high temperatures, causing bubbles, cracks, defects, deformation, etc., which affect the material. Therefore, in order to change the performance of traditional calcium carbonate products, 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