Surface-treated modified calcium carbonate and preparation method thereof

Abstract

The invention discloses a surface-treated modified calcium carbonate. The invention is characterized in that the surface-treated modified calcium carbonate is prepared from the following raw materials in parts by weight: 85-90 parts of calcium carbonate, 1-2 parts of glyceryl tristearate, 1.5-2.5 parts of polyaspartic acid, 3-5 parts of rosin resin, 4-6 parts of nylon 66, 1-1.5 parts of palmitic acid, 2-3 parts of pulverized monkey grass, 2-3 parts of mullite, 1-2 parts of hydroxypropyl cellulose, 0.8-1 part of titanate coupling agent TC-WT and 2.5-3.5 parts of modified titanium dioxide. The calcium carbonate surface is modified by the high-molecular polymer, so that the calcium carbonate has the high-molecular polymer layer; the calcium carbonate has many active groups, and thus, has favorable compatibility with many substances. For example, the unsaturated double bond can generate crosslinking reaction with the film-forming matters in the rubber, plastic and paint to generate very strong binding force, and the use of abundant calcium carbonate as the filler can not lower the properties of the product.

Description

technical field [0001] The invention relates to the field of industrial fillers, in particular to a surface-treated modified calcium carbonate and a preparation method thereof. Background technique [0002] Due to its good stability, pure color, low wear, easy processing, non-toxicity, wide range of sources, low price and many other advantages, calcium carbonate is often used to fill plastics, rubber and other materials to increase capacity, increase and reduce production costs. However, because its surface is hydrophilic and oleophobic and is easy to agglomerate, it has different interfacial properties with organic polymers and poor compatibility. Direct or excessive filling will easily lead to a decrease in the mechanical properties of the material. Through modification, its surface properties can be improved, and the comprehensive properties such as dispersibility, compatibility with the polymer interface and mechanical strength of the material can be improved. Contents...

AI Technical Summary

Problems solved by technology

However, because its surface is hydrophilic, oleophobic and easy to agglomerate, its interface properties are different from those of organic polymers, and its compatibility is poor. Direct or excessive filling will easily lead to a decrease in the mechanical properties of the material.

Images