Preparation method and application of grinding and dispersing agent

Abstract

The invention discloses a preparation method and application of a grinding and dispersing agent. The preparation method of the grinding and dispersing agent comprises the following steps of dissolving 45 to 85 parts of olefin sulphosalts materials and 30 to 50 parts of itaconic acid into deionized water to form a mixed solution; warming the mixed solution to be 65 to 97 DEG C; dropwise adding a reactant into the mixed solution to react, wherein the reactant is at least one of methacrylic acid, styrene and potassium persulfate; adjusting pH of a reaction product to be 5.5 to 6.8 after fully reacting so as to obtain the grinding and dispersing agent. Through the method, the GCC grinding efficiency can be improved, the ground GCC grain size is smaller, and the granulometric distribution interval is narrower.

Description

technical field [0001] The invention relates to a preparation method and application of a grinding dispersant. Background technique [0002] Ground calcium carbonate (GCC) is widely used in the paper industry as a coating pigment. The quality indicators of GCC mainly include fluidity, particle size and particle size distribution characteristics, etc. Among them, the GCC particle size distribution (normal distribution diagram) affects the optical properties of its prepared coatings. A narrow particle size distribution range can improve the optical properties of the paint. Scattering ability enables coated paper to obtain higher whiteness, gloss and printing adaptability. [0003] Paper coating generally uses GCC with a smaller particle size, and generally the content of particles with a particle size ≤ 2 microns is > 50%. Usually, GCC is directly ground to make its particle size smaller. In order to obtain GCC with smaller particle size, it often needs longer grinding ti...

AI Technical Summary

Problems solved by technology

Usually, GCC is directly ground to make its particle size smaller. In order to obtain GCC with smaller particle size, it often needs longer grinding time or increased grinding power to achieve it. However, although the particle size of such finished GCC is small, the particle The diameter distribution range is relatively large, which ultimately affects the surface properties of the paper (such as whiteness, gloss and printing adaptability, etc.)

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