Preparation method of modified nanometer calcium carbonate for ink

Abstract

The invention discloses a preparation method of modified nanometer calcium carbonate for an ink. The preparation method comprises the following steps: (1) adding a crystal form control agent into suspension liquid of calcium hydroxide, introducing carbon dioxide to perform carbonizing reaction, adding a crystal additive when a carbonizing rate reaches 30% or above, so as to obtain slurry containing the nanometer calcium carbonate after the carbonizing reaction is ended; (2) adding modifying liquid into the slurry containing the nanometer calcium carbonate in step (1) at the temperature of 60 to 95 DEG C, stirring and mixing for 0.5 to 2h, so as to obtain the slurry containing the modified nanometer calcium carbonate, wherein the adding amount of a dry base of the modifying liquid is equalto 2 to 6% of the mass of the nanometer calcium carbonate; (3) filtering the obtained slurry containing the modified nanometer calcium carbonate in step (2), washing, drying, and crushing, so as to obtain the modified nanometer calcium carbonate for the ink. The preparation method has the advantages that the preparation technology is simple; the obtained nanometer calcium carbonate has small sizeand good application property; the modified nanometer calcium carbonate can be applied into medium and high-grade offset ink and gravure solvent ink, and good economic benefit and social benefit are realized.

Description

technical field [0001] The invention belongs to the technical field of nano calcium carbonate preparation. Background technique [0002] There are many kinds of inks, which are divided into oxide film drying inks, osmotic drying inks, volatile drying inks, radiation drying inks, etc. according to the drying method; according to the printing process, they are divided into lithographic printing inks, letterpress printing inks, gravure printing inks, and flexographic printing inks. Printing ink and stencil printing ink; according to chemical composition, it can be divided into resin type, solvent type, oil type, water-based type, etc. [0003] In the preparation process of printing ink, nano-calcium carbonate mainly plays the role of adjusting the ink body and improving thixotropy in the ink. Therefore, high-performance nano-calcium carbonate is required, and the activated nano-calcium carbonate is used in In ink products, it exhibits excellent dispersion, transparency, fluidi...

AI Technical Summary

Problems solved by technology

[0004] Chinese Patent Publication No. CN105820601A discloses a method for preparing nano-calcium carbonate for high-grade inks. In this method, the initial temperature of the carbonization reaction is 18-23°C, and the saponification solution of linseed oil and maleic acid is added at 65-90°C. Surface treatment and modification of nano-calcium carbonate has produced nano-calcium carbonate with good optical properties and solved the problem of ink gelling, but it has poor compatibility with ink base materials, high viscosity, and poor dispersion performance

[0005] Chinese Patent Publication No. CN101531391A discloses an industrialized preparation method of nano-calcium carbonate for solvent-based ink additives. The method adopts step-by-step carbonization, strong shear emulsification and dispersion, and compound coating of disproportionated rosin and lauryl hydroxystearic acid. The synthetic process of obtaining cubic nano-calcium carbonate particles with a particle size of 70-90nm, the nano-calcium carbonate particles are not easy to settle in solvent-based inks, which improves the gloss and transparency of the ink, but its disadvantage is that nano-calcium carbonate The particle size is too large, the thixotropy is poor, the transparency is not high, and there are certain limitations when applied to solvent-based inks

Images