Fine aqueous dispersion of an organophilic sheet silicate
AssigneeHoechst Aktiengesellschaft
InventorsUte Horn, Guido Dessauer
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Abstract
The present invention relates to a fine aqueous dispersion of an organophilic sheet silicate, consisting essentially of a sheet silicate capable of cation exchange and a quaternary organic onium salt reacted therewith, which dispersion comprises from 3 to 30% by weight, based on the organophilic sheet silicate, of a water-soluble, natural polymer and/or a derivative thereof.
Claims17
A fine aqueous dispersion consisting essentially of
- a sheet silicate capable of ion exchange combined with a quanternary organic onium salt to form an organophilic sheet silicate and
- from 3 to 30% by weight, based on the organphilic sheet silicate, as anhydrous organphilic sheet silicate, of a water-soluble natural polymer and/or a salt, ether or ester thereof.
A process for producing a fine dispersion of an organophilic sheet silicate in an aqueous medium, starting from a water-containing precipitate of a sheet silicate capable of cation exchange and a quaternary organic onium salt, which comprises stirring the precipitate into a clear aqueous solution of a water-soluble, natural polymer and/or a salt, ether or ester thereof at a temperature of up to 50.degree. C., or stirring the precipitate and the water-soluble natural polymer and/or the salt, ether or ester thereof simultaneously into the aqueous medium at a temperature of up to 50.degree. C.
Dependencies are inferred from the claim text.