| 摘要 |
Esterified cellulose ethers which comprise (i) groups of the formula -C(O) - R - COOA or (ii) a combination of aliphatic monovalent acyl groups and 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, which have a viscosity of up 50 mPa.s, measured as a 10 wt% solution of the esterified cellulose ether in acetone at 20°C, and a weight average molecular weight Mw of at least 220,000 Dalton, or which have a viscosity of up 100 mPa.s, measured as a 10 wt% solution of the esterified cellulose ether in acetone at 20°C, and a weight average molecular weight Mw of at least 310,000 Dalton are useful for preparing solid dispersions comprising drugs. |
