Cellulose acetate excellent in physical strength, and process for production thereof
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United States of America Patent
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Nov 23, 1999
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N/A
app pub date -
Oct 9, 1998
filing date -
Mar 31, 1995
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Abstract
An object of the invention is to obtain cellulose acetate with improved physical properties, particularly film strength arid improved flexibility of the molded product. Cellulose acetate wherein average degree of acetylation is not less than 59%, viscosity average degree of polymerization (DP) is not less than 290, and concentrated solution viscosity (.eta.) according to the falling ball viscosity method for viscosity average degree of polymerization (DP) is expressed by the following formula (1): 2.814.times.ln(DP)-11.753.ltoreq.ln(.eta.).ltoreq.7.28.times.ln(DP)-37.059 (1) and a process for production thereof.
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