Patent · US Active

Cellulose interpolymers and methods of oxidation

US8816066B2 · kind B2 · utility

3Cited by

234References

8Claims

0Family size

Assignee

Eastman Chemical Company · US

Inventors

Charles Michael Buchanan · Kingsport, US
Norma Lindsey Buchanan · Elizabethton, US
Susan Northrop Carty · Kingsport, US
Chung-Ming Kuo · Kingsport, US
Juanelle Little Lambert · Jonesborough, US
Jessica Dee Posey-Dowty · Kingsport, US
Thelma Lee Watterson · Kingsport, US
Matthew Davie Wood · Jonesborough, US
Michael Orlando Malcolm · Kingsport, US
Margaretha Soderqvist Lindblad · Vallentuna, SE

Key dates

Filing date	Dec 22, 2010
Grant date	Aug 26, 2014
Priority date	—
Expiry date	Dec 22, 2030

Classification

Technology area (CPC A)Human Necessities
CPC primaryA61K9/2866
WIPO fieldPharmaceuticals
WIPO sectorChemistry

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.