Controlled release compositions
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United States of America Patent
Stats
-
Dec 28, 1982
Grant Date -
N/A
app pub date -
Dec 10, 1980
filing date -
Dec 19, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Molecular coordination complexes are formed between a cellulose polymer and a non-polar solid aliphatic alcohol containing 8 to 18 carbon atoms optionally substituted with an aliphatic group containing 8 to 18 carbon atoms by solvating the polymer with a volatile polar solvent and reacting the solvated cellulose polymer directly with the aliphatic alcohol, preferably as a melt. The resulting composition may be dried. This constitutes the complex. The composition has utility as a matrix in controlled release formulations since it has a uniform porosity which may be varied.
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