The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 04, 2013
Filed:
Mar. 16, 2011
Applicants:
Tohru Shibata, Himeji, JP;
Yuichiro Shuto, Himeji, JP;
Masaaki Ito, Otake, JP;
Tanemi Asai, Kakogawa, JP;
Inventors:
Tohru Shibata, Himeji, JP;
Yuichiro Shuto, Himeji, JP;
Masaaki Ito, Otake, JP;
Tanemi Asai, Kakogawa, JP;
Assignee:
Daicel Chemical Industries, Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C08B 3/06 (2006.01); C08B 1/00 (2006.01); C08B 3/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A process for adjusting an intermolecular or intramolecular degree of acetyl substitution of cellulose acetate is disclosed. The process comprises ripening cellulose acetate in the presence of a catalyst, an acetyl donor, and water or an alcohol. The amount of water and the alcohol is in the range of 0.1 to 10 mol % based on the amount of the acetyl donor.