Method for producing low-substituted hydroxypropylcellulose
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United States of America Patent
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Jan 17, 2017
Grant Date -
Mar 15, 2012
app pub date -
Sep 13, 2011
filing date -
Sep 14, 2010
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Abstract
Provided is a method for producing low-substituted hydroxypropylcellulose in which depolymerization capable of achieving a target viscosity in a short time is carried out safely after an etherification reaction step. More specifically, provided is a method for producing low-substituted hydroxypropylcellulose having a degree of hydroxypropoxy substitution of from 9.5 to 16.0% by weight, comprising at least a step of reacting alkali cellulose with an etherifying agent and a step of carrying out depolymerization after the reaction.
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