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METHOD OF PREPARING SOLUTION OF MIXED FATTY ACID ESTER OF CELLULOSE AND METHOD OF MANUFACTURING FILM OF MIXED FATTY ACID ESTER OF CELLULOSE
METHOD OF PREPARING SOLUTION OF MIXED FATTY ACID ESTER OF CELLULOSE AND METHOD OF MANUFACTURING FILM OF MIXED FATTY ACID ESTER OF CELLULOSE
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机译:纤维素混合脂肪酸酯的制备方法及纤维素混合脂肪酸膜的制备方法
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摘要
PROBLEM TO BE SOLVED: To enable a cellulose ester to be dissolved in a variety of organic solvents.;SOLUTION: In this preparation method, a mixed fatty acid ester of cellulose of which hydroxy groups are substituted by acetyl groups and acyl groups having 3 or more carbon atoms and of which the degree of acetyl group substitution (DSace) and the degree of substitution (DSacy) by the acyl group having 3 or more carbon atoms satisfies the following formulae; (1) 2.0DSace≤2.95, (2) 0.05DSacy≤0,8 and (3) 2.6DSace+DSacy≤3.0. The mixed fatty acid ester of cellulose is dissolved in a solvent in such a way that these two are mixed in advance, then they are cooled to a freezing temperature or below and thereafter they are heated.;COPYRIGHT: (C)2003,JPO
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