Process for bacterial stabilizing of aqueous ground natural calcium carbonate and/or precipitated calcium carbonate and/or dolomite and/or surface-reacted calcium carbonate-comprising mineral preparations

摘要

This invention discloses a process for stabilizing an aqueous mineral preparation comprising a step of adding at least one aldehyde-containing and/or aldehyde-releasing and/or phenolic and/or isothiazoline biocide to said aqueous mineral preparation.

主权项

1. A process for stabilizing an aqueous mineral preparation comprising:
(a) adding at least one biocide to the aqueous mineral preparation, wherein the at least one biocide is an aldehyde-containing and/or aldehyde-releasing and/or phenolic and/or isothiazoline biocide; and (b) adding at least one monoalcohol primary alkanol amine to the aqueous mineral preparation;wherein:
the mineral preparation comprises at least one of a ground natural calcium carbonate, a precipitated calcium carbonate, a dolomite, a surface-modified calcium carbonate, or any mixture thereof; steps (a) and (b) are performed simultaneously or separately in any order; the at least one biocide is added to the aqueous preparation in an amount corresponding to from 90 to 1350 ppm based on the weight of the aqueous phase of the aqueous mineral preparation; and the at least one monoalcohol primary alkanol amine is added to the aqueous preparation in an amount corresponding to from 600 to 1200 ppm based on the weight of the aqueous phase of the aqueous mineral preparation.