Hydroxyalkyl alkyl cellulose, method for producing the same, and solid preparation
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United States of America Patent
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Jun 11, 2019
Grant Date -
Apr 12, 2018
app pub date -
Oct 2, 2017
filing date -
Oct 7, 2016
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Abstract
Provided is a hydroxyalkyl alkyl cellulose exhibiting good flowability and high compressibility. More specifically, there are provided a hydroxyalkyl alkyl cellulose having a volume-based average particle size, determined by dry laser diffractometry, of more than 100 μm and not more than 150 μm; and after dividing all particles into fine particles, spherical particles and fibrous particles by a dynamic image analysis, a volume fraction of the fibrous particles relative to all of the particles of more than 40% and not more than 50%, and a volume fraction of the fine particles relative to all of the particles of less than 2.0%; a solid preparation including the hydroxyalkyl alkyl cellulose; and others.
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