Producing method of cellulose polymer
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United States of America Patent
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Apr 15, 2003
Grant Date -
Jul 26, 2001
app pub date -
Dec 7, 2000
filing date -
Dec 8, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A producing method of a cellulose polymer powder is provided, which comprises dissolving a cellulose polymer by exposure to an organic solvent containing, as the main component, an ester-based solvent having from 2 to 8 carbon atoms, a ketone-based solvent having from 4 to 10 carbon atoms, or an alcohol-based solvent having from 3 to 6 carbon atoms, and carbon dioxide, and then removing the carbon dioxide and the organic solvent from the solution. A producing method of an organic solvent solution of a cellulose polymer is also provided.
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