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AssigneeEastman Chemical Company
InventorsCharles Michael Buchanan, Norma Lindsey Buchanan, Susan Northrop Carty, Chung-Ming Kuo, Juanelle Little Lambert, Jessica Dee Posey-Dowty, Thelma Lee Watterson, Matthew Davie Wood, Michael Orlando Malcolm, Margaretha Soderqvist Lindblad
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This invention provides cellulose ester interpolymers, and methods of oxidizing cellulose interpolymers and cellulose ester interpolymers. The invention also provides routes to access carboxylated cellulose ester derivatives with high acid numbers wherein the carboxyl group is attached directly to the cellulose backbone by a carbon-carbon bond. Through functionalization of an intermediate aldehyde, the corresponding cationic or zwitterionic cellulose ester derivatives can also be accessed. The interpolymers of the present invention have a number of end-use applications, for example, as binder resins in various types of coating compositions and as drug delivery agents.
A cellulose ester interpolymer wherein the C2 and C3 positions of each of the anhydroglucose units of the cellulose ester interpolymer are in the alcohol oxidation state, and consisting of anhydroglucose units
A cellulose ester interpolymer wherein the C2 and C3 positions of each of the monomer units of the cellulose ester interpolymer are in the alcohol oxidation state, and comprising a plurality of anhydroglucose units having a C6 carboxy group and wherein the cellulose ester interpolymer has an apparent degree of substitution per anhydroglucose unit of C2-C12 acyl of at least about 0.6 and an acid number of greater than 10, wherein said cellulose ester interpolymer consists of anhydroglucose units, anhydroglucuronic acid units, esters of anhydroglucose units, and esters of anhydroglucuronic acid units.
A cellulose ester interpolymer having a degree of polymerization of at least 10, an acid number of greater than 10, and a random distribution throughout the cellulose ester interpolymer of anhydroglucose units having a C6 carboxy group, wherein the C2 and C3 positions of each of the monomer units of the cellulose ester interpolymer are in the alcohol oxidation state, wherein said cellulose ester interpolymer consists of anhydroglucose units, anhydroglucuronic acid units, esters of anhydroglucose units, and esters of anhydroglucuronic acid units.
Dependencies are inferred from the claim text.