High ring crush compression strength modified calcium carbonate used for paper, and preparation method thereof

Abstract

The invention provides a high ring crush compression strength modified calcium carbonate used for paper. The modified calcium carbonate comprises following raw material ingredients, by weight, 95 to 100 portions of 325 meshes heavy calcium carbonate, 1 to 2 portions of polyoxyethylene stearates, 0.3 to 0.5 portions of soluble glass, 0.1 to 0.2 portion of triethylhexyl phosphoric acid, 0.1 to 0.3 portion of sodium dodecyl benzene sulfonate, 2 to 3 portions of phenolic resin, 0.1 to 0.2 portion of ammonium sulfate, 2 to 4 portions of n-butyl stearate, 0.2 to 0.4 portion of polyving akohol, 0.3 to 0.4 portion of poly(4-methyl-1-pentene), 0.1 to 0.3 portion of peregal O, 0.2 to 0.3 portion of hollow glass microbead, 0.1 to 0.2 portion of glass fibre and 0.2 to 0.3 portion of nano-titania. The preparation method comprises following steps, part of the raw material ingredients are mixed; calcium carbonate is dried, and is added into the mixed raw material ingredients; the rest raw material ingredients are added according to the ratio and a preset sequence; and the mixture is mixed fully in a high-speed mixed, is dried, and is grinded so as to obtain the modified calcium carbonate. The modified calcium carbonate is high in dispersity and ring crush compression strength, and can be used for boxboard paper so as to reduce cost and improve physical properties of boxboard paper, especially ring crush compression strength.

Description

technical field [0001] The invention relates to the field of inorganic fillers, in particular to a modified calcium carbonate for paper with high ring crush strength and a preparation method thereof. Background technique [0002] Ground calcium carbonate is a commonly used inorganic filler. It is widely used in rubber, plastics, coatings and other fields due to its wide source and low price. However, the surface of heavy calcium carbonate is hydrophilic and oleophobic, the specific surface area is large, the surface energy is high, and the particles are easily agglomerated. When directly or in large quantities filled in organic matrix materials, it is not only difficult to disperse evenly, but also has a weak binding force with the matrix. , leading to two-phase interface defects and some performance degradation of composite materials. Therefore, in order to broaden its application field, it is necessary to modify the surface of heavy calcium carbonate to make its surface l...

AI Technical Summary

Problems solved by technology

However, the surface of heavy calcium carbonate is hydrophilic and oleophobic, the specific surface area is large, the surface energy is high, and the particles are easily agglomerated. When directly or in large quantities filled in organic matrix materials, it is not only difficult to disperse evenly, but also has a weak binding force with the matrix. , resulting in defects at the two-phase interface and some performance degradation of the composite

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