PROCESS FOR PRODUCTION OF CELLULOSE ACYLATE, CELLULOSE ACYLATE, CELLULOSE ACYLATE FILM, AND OPTICAL FILM AND IMAGE DISPLAY DEVICE USING THE CELLULOSE ACYLATE FILM

摘要

PROBLEM TO BE SOLVED: To provide a process for production of a cellulose acylate capable of giving a cellulose acylate film with favorable thermal stability and optical property.;SOLUTION: The cellulose acylate having a specific range of the degree of acylation is produced by contacting cellulose and a 2-7C carboxylic acid at 20-100°C, acylating with an acylating agent in the presence of a sulfuric acid catalyst, maintaining the resultant reaction mixture for at least an hour at 30-100°C in the presence of a stoichiometrically excess amount of a base relative to the sulfuric acid group in the reaction mixture.;COPYRIGHT: (C)2006,JPO&NCIPI