Sulfonato-organosilanol compounds and aqueous solutions
AssigneeMinnesota Mining and Manufacturing Company
InventorsBoyd R. Beck, Frank T. Sher, George V. D. Tiers
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Abstract
Sulfonato-organosilanol compounds and aqueous solutions and compositions thereof are provided which have at least one sulfonato-organic substituent therein. The weight percentage of oxygen in the compounds is at least about 30% and the weight percentage of silicon in the compounds is not greater than about 15%, these percentages being taken with reference to the water-free acid form of the compounds. Hydrophilic siliceous surfaces and processes for imparting hydrophilicity to such surfaces are also provided.
Claims38
An aqueous solution comprising a sulfonato-organosilanol compound having at least one sulfonato-organic substituent, wherein the weight percentage of oxygen in said compound is at least about 30%, and the weight percentage of silicon in said compound is not greater than about 15%, said percentages being taken with reference to the water-free acid form of said compound.
An organosilanol sulfonic acid having the formula ##STR28## wherein Q is selected from hydroxyl, alkyl groups containing from 1 to about 4 carbon atoms and alkoxy groups containing from 1 to about 4 carbon atoms;
- X is an organic linking group;
- and n is 1 or 2;
- wherein the weight percentage of oxygen in said compound is at least about 30%, and the weight percentage of silicon in said compound is not greater than about 15%;
- said percentages being taken with respect to the water-free acid form of said compound.
An organosilanolate-sulfonic acid salt having the formula ##STR31## wherein Q is selected from hydroxyl, alkyl groups containing from 1 to about 4 carbon atoms and alkoxy groups containing from 1 to about 4 carbon atoms;
- Z is selected from alkali metals and cations of strong organic bases having an average molecular weight of less than about 150 and a pK.sub.a of greater than about 11;
- r is equal to the valence of Z;
- and n is an integer of 1 or 2;
- wherein the weight percentage of oxygen in said compound is at least about 30%;
- and the weight percentage of silicon in said compound is not greater than about 15%, said percentages being taken with respect to the water-free acid form of said compound.
Dependencies are inferred from the claim text.