Hydrophilic Polyurethane Compositions

A water-swellable linear polymer is made by reacting together a polyethylene oxide of number average molecular weight less than 4,000, an aliphatic diol, and a difunctional diisocyanate. Controlled release composition comprises the polymer together with an active agent. The polymer is able to take u...

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Bibliographic Details
Main Authors ZURUTUZA AMAIA, TUOMINEN JUKKA, LIVINGSTON MARK, HALLIDAY JANET A
Format Patent
LanguageEnglish
Published 26.11.2009
Subjects
CHEMISTRY
COMPOSITIONS BASED THEREON
HUMAN NECESSITIES
HYGIENE
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONSONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
MEDICAL OR VETERINARY SCIENCE
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES
SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS ORMEDICINAL PREPARATIONS
THEIR PREPARATION OR CHEMICAL WORKING-UP
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Summary:A water-swellable linear polymer is made by reacting together a polyethylene oxide of number average molecular weight less than 4,000, an aliphatic diol, and a difunctional diisocyanate. Controlled release composition comprises the polymer together with an active agent. The polymer is able to take up pharmaceutically active agents of molecular weight 200 to 20,000.
Bibliography:Application Number: US20070307514