NOVEL ESTERIFIED CELLULOSE ETHERS OF LOW VISCOSITY

Esterified cellulose ethers which comprise (i) aliphatic monovalent acyl groups or (ii) groups of the formula -C(O)-R-COOA, wherein R is a divalent aliphatic or aromatic hydrocarbon group and A is hydrogen or a cation, or (iii) a combination of aliphatic monovalent acyl groups and groups of the form...

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Bibliographische Detailangaben
Hauptverfasser:	SPREHE, Matthias, GRASMAN, Nicholas S, BRACKHAGEN, Meinolf, PETERMANN, Oliver, SCHMITT, Robert L, GUILLAUDEU, Steven J
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON DERIVATIVES THEREOF HUMAN NECESSITIES HYGIENE MEDICAL OR VETERINARY SCIENCE METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS POLYSACCHARIDES PREPARATIONS FOR MEDICAL, DENTAL, OR TOILET PURPOSES THEIR PREPARATION OR CHEMICAL WORKING-UP
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Beschreibung
Zusammenfassung:	Esterified cellulose ethers which comprise (i) aliphatic monovalent acyl groups or (ii) groups of the formula -C(O)-R-COOA, wherein R is a divalent aliphatic or aromatic hydrocarbon group and A is hydrogen or a cation, or (iii) a combination of aliphatic monovalent acyl groups and groups of the formula -C(O)-R-COOA, which have a viscosity of up to 2.33 mPa·s, measured as a 2.0 wt % solution of the esterified cellulose ether in 0.43 wt % aqueous NaOH at 20° C., and which have a viscosity of up to 13 mPao·s, measured as a 10 wt % solution of the esterified cellulose ether in acetone at 20° C. are useful for preparing solid dispersions comprising drugs.