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US 4,785,087 AGranted
Process for dry cationization of starch
AssigneeDegussa AG
InventorsReinhard Stober, Wolfgang Fischer, Michael Huss, Klaus Udluft
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Abstract
A dry process for preparation of cationic starch ethers by reaction of starch with alkylidene epoxides in the presence of water in an alkaline medium at a temperature of 5.degree. to 40.degree. C. in the presence of a finely divided silica.
Claims24
A process for dry cationization of starch comprising reacting starch or a starch containing substance with an alkylidene epoxide in an alkaline medium in water, at a temperature of about 5 to 40 .degree. C. in the presence of a finely divided silica.
Dependencies are inferred from the claim text.