High solids aqueous mineral and/or filler and/or pigment suspension in acidic pH environment

摘要

The present invention relates to high solids aqueous mineral and/or filler and/or pigment suspensions in acidic pH environment, to a method for producing such high solids aqueous mineral and/or filler and/or pigment suspension to the use of the high solids aqueous mineral and/or filler and/or pigment suspension in paper making, paper coating, plastic, agricultural and/or paint applications and as filler in paper and to a coating color formulation comprising the high solids aqueous mineral and/or filler and/or pigment suspension.

主权项

1. A high solids aqueous mineral and/or filler and/or pigment suspension in acidic pH environment comprising:
a) at least one calcium carbonate-containing material comprising calcium carbonate-containing particles, and b) at least one salt of at least one strong acid, wherein the at least one strong acid forming the at least one salt of at least one strong acid is selected from the group consisting of acids having a pKa value of less than or equal to zero at +23° C., wherein the high solids aqueous suspension has i) a solids content of at least 50 wt.-%, based on the total weight of the high solids aqueous suspension, ii) a Brookfield viscosity at 100 rpm of ≦1000 mPas at a temperature of −5° C., iii) a pH of <6 at +23° C., and iv) a conductivity of between 10 and 100 mS/cm at −5° C. and at +23° C.