Cellulose acetate excellent in physical strength, and process for production thereof
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United States of America Patent
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Jun 22, 1999
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N/A
app pub date -
Nov 21, 1996
filing date -
Mar 31, 1995
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Abstract
An object of the invention is to obtain cellulose acetate having improved physical properties, particularly film strength and improved flexibility of the molded product. Cellulose acetate having an average degree of acetylation of not less than 59%, viscosity average degree of polymerization (DP) of not less than 290. and concentrated solution viscosity (.eta.) according to falling ball viscosity method for viscosity average degree of polymerization (DP) 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 the production thereof.
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