HYDROXYALKYL ALKYL CELLULOSE, METHOD FOR PRODUCING THE SAME, AND SOLID PREPARATION
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United States of America Patent
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Apr 12, 2018
app pub date -
Oct 2, 2017
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Oct 7, 2016
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Abstract
There is provided is a hydroxyalkyl alkyl cellulose exhibiting good flowability and high compressibility. More specifically, provided are a hydroxyalkyl alkyl cellulose having a volume-based average particle diameter, determined by dry laser diffractometry, of 50 to 100 μm, and having, on a basis of a dynamic image analysis to divide all particles into fine particles, spherical particles and fibrous particles, a volume fraction of the fibrous particles consisting of long and short fibrous particles relative to all of the particles of 45 to 70%, 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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