发明名称 |
PROCESS FOR PREPARING AN ESTER OF A CELLULOSE ETHER IN THE PRESENCE OF AN ALKALI METAL CARBOXYLATE |
摘要 |
<p>Two or more esters of a cellulose ether, each having the same ether and ester substituents but different weight average molecular weights are prepared in a process which comprises the steps of esterifying a cellulose ether with (i) an aliphatic monocarboxylic acid anhydride or (ii) a dicarboxylic acid anhydride or (iii) a combination of an aliphatic monocarboxylic acid anhydride and a dicarboxylic acid anhydride in the presence of an alkali metal carboxylate in two or more separate reactions, wherein in each reaction a different molar ratio [alkali metal carboxylate/anhydroglucose units of cellulose ether] is used to produce esters of the cellulose ether of different weight average molecular weights.</p> |
申请公布号 |
EP2888292(A1) |
申请公布日期 |
2015.07.01 |
申请号 |
EP20130753061 |
申请日期 |
2013.08.15 |
申请人 |
DOW GLOBAL TECHNOLOGIES LLC |
发明人 |
PETERMANN, OLIVER;SPREHE, MATTHIAS |
分类号 |
C08B11/20;C08B13/00 |
主分类号 |
C08B11/20 |
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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