Patent ID: 7709090
Filing Date: 2010-05-04
Classification: C01P,C09C,Y10T

Abstract:
1. Particles comprising a core of calcium carbonate and a coating covering at least part of the surface of the core, said coating comprising at least two different coating agents which are applied in at least two distinct and consecutive steps, wherein a first coating agent comprises at least one compound selected from the group consisting of alkylsulfates, sulfonic acids, carboxylic acids, their salts, their esters, fatty alcohols, polyhydric alcohols and mixtures thereof and is applied on at least part of the surface of the core in a first step to provide an intermediate product, and wherein a second coating agent comprises at least one compound selected from the group consisting of polyhydric alcohols, esters of carboxylic acids, and mixtures thereof and is applied on at least part of the surface of said intermediate product in a second step.