Method for preparing synthetic huntite, and polyurethane fiber using same

Abstract

The present invention relates to a huntite mineral having a structural formula of Mg3Ca(CO3)4, and provides a method for preparing synthetic huntite microparticles having a whiteness of 80% or higher, a purity of 95% or higher and a maximum particle size of 1 μm or less, and a polyurethane fiber comprising huntite microparticles comprising the same, the method comprising the steps of: preparing a cation precursor material containing magnesium ions and calcium ions in a molar ratio of 3:1, and preparing an anion precursor material containing CO32− ions; mixing the precursor materials, thereby obtaining a hydrated huntite crystal precipitate; washing the hydrated huntite crystal precipitate; drying the hydrated huntite crystal precipitate having been washed; heat-treating same in order to remove crystallization water from the hydrated huntite crystal precipitate having been dried; crushing the heat-treated huntite crystal; and surface-treating the crushed huntite crystal particles.

Dependencies are inferred from the claim text.