Large intestinal dissociative hard capsules
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United States of America Patent
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Feb 1, 1994
Grant Date -
N/A
app pub date -
Jun 4, 1991
filing date -
Jun 4, 1990
priority date (Note) -
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Abstract
A large intestinal dissociative hard capsule comprising a capsule mainly composed of chitosan, the viscosity at 20.degree. C. of a solution obtained by dissolving the chitosan in an aqueous 1% by weight acetic acid solution being not higher than 100 cps and the degree of deacetilation of the chitosan being from 60 mol % to 98 mol %, having a coated layer of a polymer soluble in a liquid having pH of at least 5 on the surface of the capsule.
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