Chemistry of carbon compounds – Miscellaneous organic carbon compounds
Patent
1975-05-09
1977-08-23
Marquis, Melvyn I.
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
252410, 260 79, 260 797, 260117, 260119, 2601235, 526 47, 526 48, 536 1, 536 3, 536 56, 536 59, 536 62, 536 63, 536101, 536105, 536111, 536114, 536121, C08L 304
Patent
active
040439526
ABSTRACT:
The aqueous dispersibility of a water-absorbent composition of matter is improved by a surface treatment which ionically complexes the surface thereof to a moderate degree. A dispersion is formed comprising a water-absorbent composition of matter based on an anionic poly-electrolyte, at least one polyvalent metal cation, and a dispersing medium in which the composition of matter is substantially insoluble. The dispersion is maintained within a given temperature range for a period of time sufficient to ionically complex the exposed surface of the composition of matter, and the dispersing medium is then removed. The product is characterized by a linkage density which is greater at the surface thereof than in the interior thereof and by the presence of ionic linkages at the surface thereof.
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Ganslaw Stuart H.
Katz Howard G.
Marquis Melvyn I.
National Starch and Chemical Corporation
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