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:
Jul. 07, 2020
Filed:
Mar. 12, 2014
Daicel Corporation, Osaka-shi, Osaka, JP;
Shizuka Ukita, Himeji, JP;
Hiroki Taniguchi, Himeji, JP;
Shu Shimamoto, Tokyo, JP;
Toshikazu Nakamura, Himeji, JP;
DAICEL CORPORATION, Osaka-shi, JP;
Abstract
A cellulose acetate according to the present invention has a total degree of acetyl substitution of 0.4 to 1.1 and has a compositional distribution index (CDI) of 3.0 or less, where the CDI is specified by the formula:CDI=(Measured value of half height width of chemical composition)/(Theoretical value of half height width of chemical composition)where the measured value of half height width of chemical composition is a half height width of chemical composition determined by analyzing a cellulose acetate propionate by HPLC, where the cellulose acetate propionate is prepared by propionylating all residual hydroxy groups of the cellulose acetate (sample); andTheoretical value of half height width of chemical composition=2·35482√{square root over (3**(/3)*(1−/3))}/  [Math. 1]where DS is the total degree of acetyl substitution; and DPw is a weight-average degree of polymerization determined by a GPC-light scattering method using a cellulose acetate propionate prepared by propionylating all residual hydroxy groups of the cellulose acetate (sample).