| abstract |
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 19 mPa∙s, measured as a 10 wt% solution of the esterified cellulose ether in acetone at 20 °C, and which have a weight average molecular weight M w of at least 90,000 Dalton, are useful for preparing solid dispersions comprising drugs. |