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 t
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.
대표청구항▼
1. A cellulose ester interpolymer wherein the C2 and C3 positions of each of the anhydroglucose units of the cellulose ester interpolyer are in the alcohol oxidation state, and consisting of anhydroglucose units as the non-terminal monomer units of said cellulose ester interpolymer,wherein R1, R2, R
1. A cellulose ester interpolymer wherein the C2 and C3 positions of each of the anhydroglucose units of the cellulose ester interpolyer are in the alcohol oxidation state, and consisting of anhydroglucose units as the non-terminal monomer units of said cellulose ester interpolymer,wherein R1, R2, R3, R4, and R5 are independently selected from the group consisting of hydrogen and C2-C12 acyl groups, wherein at least one of R1, R2, R3, R4, and R5 is a C2-C12 acyl group; and,X is formyl, and having an apparent degree of substitution per anhydroglucose unit of X of 0.2 to 1.0, and an apparent degree of substitution per anhydroglucose unit of C2-C12 acyl of 1.7 to 2.8. 2. The cellulose ester interpolymer of claim 1, wherein R1, R2, R3, R4, and R5 are independently selected from the group consisting of hydrogen, acetyl, propionyl, butyryl, or a mixture thereof. 3. The cellulose ester interpolymer of claim 1, having a weight average molecular weight of at least 5,000 g/mol. 4. The cellulose ester interpolymer of claim 1, having a degree of polymerization of at least 10. 5. The cellulose ester interpolymer of claim 1, wherein at least a portion of R3 is hydrogen. 6. The cellulose ester interpolymer of claim 1, comprising a plurality of anhydroglucose units having a primary alcohol group at C6. 7. The cellulose ester interpolymer of claim 1, having a degree of polymerization of between 25 and 50. 8. The cellulose ester interpolymer of claim 1, having a weight average molecular weight in the range of 20,000 to 400,000 g/mol.
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