Surface modified silica
AssigneeCabot Corporation
InventorDavid M. Regan
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Abstract
A novel and improved surfactant modified silica and method for making the same. The surfactant modified silica is characterized as a fumed silica having a surfactant material treated therewith. Also disclosed is process of thickening aqueous systems which includes the addition of an effective amount of a fumed silica having a surfactant material treated therewith.
Claims12
A surface modified silica for use in aqueous based systems comprising fumed silica having between 0.5% to about 10% by weight of a material selected from the group consisting of di-functional EO-PO block copolymers;
- tetra-functional EO-PO block copolymers;
- quaternary ammonium salts;
- ethoxylated quaternary ammonium salts;
- tertiary alkylamines and salt derivatives thereof;
- or amine ethoxylates and salt derivatives thereof, treated therewith.
A process for thickening aqueous systems comprising adding thereto a thickening effective amount of fumed silica having been treated with between 0.5% to about 10% by weight of a material selected from the group consisting of di-functional EO-PO block copolymers;
- tetra-functional EO-PO block copolymers;
- quaternary ammonium salts;
- ethoxylated quaternary ammonium salts;
- tertiary alkylamines and salt derivatives thereof;
- or amine ethoxylates and salt derivatives thereof.
Dependencies are inferred from the claim text.