发明名称 |
Processes for preparing polytrimethylene ether glycol esters |
摘要 |
Provided are processes for preparing polytrimethylene ether glycol monoester or diesters composition wherein polytrimethylene ether glycol containing less than about 1 weight % of unreacted diol monomer is reacted with an equivalent excess of a monocarboxylic acid. |
申请公布号 |
US8759559(B2) |
申请公布日期 |
2014.06.24 |
申请号 |
US201213449862 |
申请日期 |
2012.04.18 |
申请人 |
E I du Pont de Nemours and Company |
发明人 |
Sunkara Hari Babu;Cotterill Sam |
分类号 |
C11C3/00;C07C69/66 |
主分类号 |
C11C3/00 |
代理机构 |
|
代理人 |
|
主权项 |
1. A process for preparing a monocarboxylic acid ester of a polytrimethylene ether glycol comprising:
(a) providing a polytrimethylene ether glycol having a number average molecular weight of about 250 to about 5000 and containing less than about 1 weight % of unreacted diol monomer; (b) heating the polytrimethylene ether glycol for at least 5 hours under inert gas at an initial pressure and at a temperature of about 160° C. to about 250° C. in the presence of a molar excess of one or more monocarboxylic acids or monocarboxylic acid equivalents to form a reaction mixture;
wherein the or monocarboxylic acid or monocarboxylic acid equivalent has the formula R—COOH, wherein R is an a substituted or unsubstituted aromatic, saturated linear or branched aliphatic, unsaturated aliphatic, or cycloaliphatic organic group containing from 6 to 40 carbon atoms; and (c) further heating the reaction mixture for at least 1 hour at a second pressure of about 50 mm Hg or less and at a temperature of about 160° C. to about 250° C., wherein the second pressure is less than the initial pressure; to form a polytrimethylene ether glycol monoester or diester, or mixtures thereof.
|
地址 |
Wilmington DE US |