Aqueous fine dispersion of an organophilic sheet silicate
AssigneeHoechst Aktiengesellschaft
InventorsGuido Dessauer, Klaus Kuber, Ute Horn
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Abstract
The invention relates to an aqueous fine dispersion of an organophilic sheet silicate which is composed of a sheet silicate which is capable of cation exchange and of a quaternary organic onium salt reacted therewith, and contains 3 to 30% by weight, based on the organophilic sheet silicate, of polyvinyl alcohol. This fine dispersion is suitable as coating composition for paper and board and as lubricant additive for conventional coating compositions.
Claims13
An aqueous fine dispersion of an organophilic sheet silicate, consisting essentially of a sheet silicate which is capable of cation exchange and a quaternary organic onium salt reacted therewith, which dispersion contains 3 to 30% by weight, based on the organophilic sheet silicate, of polyvinyl alcohol, and said dispersion containing no pigments or organic solvents.
A process for the preparation of a fine dispersion of an organophilic sheet silicate in aqueous medium, said dispersion containing no pigments or organic solvents starting from the components consisting essentially of a water-containing precipitate of sheet silicate which is capable of cation exchange and a quaternary organic onium salt, which consisting essentially of stirring the precipitate into a clear aqueous solution of a polyvinyl alcohol at a temperature of at least 50.degree. C., or stirring the precipitate and the polyvinyl alcohol, simultaneously into the aqueous medium at a temperature of at least 50.degree. C.
An aqueous fine dispersion of an organophilic sheet silicate, consisting essentially of a sheet silicate which is capable of cation exchange and a quaternary organic onium salt reacted therewith, and at least one of i) a disinfectant selected from the group consisting of hydrogen peroxide and quaternary ammonium salts, and ii) at least one optical brightener, which dispersion contains 3 to 30% by weight, based on the organophilic sheet silicate, of polyvinyl alcohol, and said dispersion containing no pigments or organic solvents.
Dependencies are inferred from the claim text.