Safe, environment-friendly and nontoxic modified calcium carbonate and preparation method thereof

Abstract

The invention discloses a safe, environment-friendly and nontoxic modified calcium carbonate and a preparation method thereof. The modified calcium carbonate is prepared from the following raw materials in parts by weight: 90 to 95 parts of calcium carbonate, 2 to 3 parts of clam shell power, 2 to 3 parts of smashed yellow cinnamon leaves, 4 to 5 parts of alkenyl succinic anhydride, 2 to 3 parts of porous starch, 1 to 2 parts of sodium hyaluronate, 2 to 4 parts of easy-to-disperse fibers, 2 to 3 parts of urea, 4 to 6 parts of potash feldspar powder, 5 to 7 parts of high density polyethylene, 4 to 6 parts of nylon 66, 1 to 2 parts of tea polyphenol and 3 to 4 parts of modified titanium dioxide. The formula of the modified calcium carbonate is formed by adopting environment-friendly raw materials, so that the utilization of waste materials is realized, i.e., the waste of resources is avoided; a large quantity of safe and nontoxic components are added; the surface of the calcium carbonate is modified by utilizing the high-molecular polymers, so that the modified calcium carbonate has a high-molecular polymer layer. Thus, the bonding force of the modified calcium carbonate is enhanced while the performance of the modified calcium carbonate is not decreased. The modified calcium carbonate disclosed by the invention is applied to the production of preservative film aids, degradable plastics additives, pigment or paint additives and other functional products.

Description

technical field [0001] The invention relates to the field of industrial fillers, in particular to a safe, environment-friendly and non-toxic modified calcium carbonate and a preparation method thereof. Background technique [0002] Calcium carbonate is a very important functional inorganic filler, which is widely used in industrial fields such as plastics, rubber, coatings and papermaking. In the application field of calcium carbonate, most products belong to the category of polymers, such as plastics, rubber, adhesives, coatings, etc., and occupy an important market share. Modifiers play an important role in the performance and application of nano calcium carbonate. For example, the addition of dispersant can reduce the agglomeration of nanoparticles and improve the dispersion; the addition of surface modifier can improve the compatibility of nano-calcium carbonate in the polymer system. It can be seen that dispersants and surface modifiers are crucial for the application...

AI Technical Summary

Problems solved by technology

However, the addition of dispersants and surface modifiers greatly reduces the temperature window of nano-calcium carbonate, because commonly used dispersants and coupling agents are easy to decompose at high temperatures, causing bubbles, cracks, defects, deformation, etc., thus Affect the appearance, heat resistance and mechanical properties of materials

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