Starch ethers containing nitrogen and process for making the same
First Claim
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7. A PROCESS FOR PREPARING A GELATINIZABLE CATIONIC STARCH ETHER WHICH COMPRISES REMOVING SUBSTANTIALLY ALL OF THE UNREACTED EPICHLOROHYDRIN FROM THE REACTION PRODUCT OF EPICLOROHYDRIN AND A TERTIARY AMINE WHEREIN TWO OF THE GROUPS ATTACHED TO THE NITROGEN ARE METHYL, AND ETHERIFYING STARCH WITH THE RESULTANT REACTION PRODUCT SUBSTANTIALLY FREE OF EPICHLOROHYDRIN, IN CONTACT WITH A STRONGLY ALKALINE CATALYST, THE ETHERIFICATION BEING CARRIED OUT UNDER NON-GELATINIZING CONDITIONS.
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7 Claims
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7. A PROCESS FOR PREPARING A GELATINIZABLE CATIONIC STARCH ETHER WHICH COMPRISES REMOVING SUBSTANTIALLY ALL OF THE UNREACTED EPICHLOROHYDRIN FROM THE REACTION PRODUCT OF EPICLOROHYDRIN AND A TERTIARY AMINE WHEREIN TWO OF THE GROUPS ATTACHED TO THE NITROGEN ARE METHYL, AND ETHERIFYING STARCH WITH THE RESULTANT REACTION PRODUCT SUBSTANTIALLY FREE OF EPICHLOROHYDRIN, IN CONTACT WITH A STRONGLY ALKALINE CATALYST, THE ETHERIFICATION BEING CARRIED OUT UNDER NON-GELATINIZING CONDITIONS.
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Current AssigneeEugene F. Paschall
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Original AssigneeEugene F. Paschall
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InventorsPaschall, Eugene F.
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Application NumberUS03/631,429Time in Patent Office792 DaysField of SearchUS Class Current536/50CPC Class CodesC07D 303/36 with hydrocarbon radicals, ...C08B 31/125 having a substituent contai...
