发明名称 |
PROCESS OF PREPARING A HIGH MOLECULAR WEIGHT ESTERIFIED CELLULOSE ETHER |
摘要 |
An esterified cellulose ether of increased weight average molecular weight is produced in a process for reacting a cellulose ether with an aliphatic monocarboxylic acid anhydride and a dicarboxylic acid anhydride, wherein the process comprises the steps of a) preparing a reaction mixture comprising the cellulose ether, the dicarboxylic acid anhydride and a reaction diluent and heating the reaction mixture to a temperature of from 60C to 110 C prior to, during or after mixing the components of the reaction mixture, and b) adding continuously or in at least three portions the monocarboxylic acid anhydride to the reaction mixture of step a) and completing the reaction. |
申请公布号 |
WO2016186895(A1) |
申请公布日期 |
2016.11.24 |
申请号 |
WO2016US31584 |
申请日期 |
2016.05.10 |
申请人 |
DOW GLOBAL TECHNOLOGIES LLC |
发明人 |
PETERMANN, Oliver;BRACKHAGEN, Meinolf |
分类号 |
C08B13/00;A61K47/38 |
主分类号 |
C08B13/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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