Novel esterified cellulose ethers of very high molecular weight

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专利权人:

发明人:

PETERMANN OLIVER,BRACKHAGEN MEINOLF,SPREHE MATTHIAS

申请号：

IN8746/DELNP/2015

公开号：

IN2015DN08746A

申请日:

2015.09.23

申请国别(地区):

IN

年份:

2016

代理人:

摘要：

wwEsterified 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 M 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 M of at least 310 000 Dalton are useful for preparing solid dispersions comprising drugs.

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