发明名称 |
Copolymerization of dicarboxylic acids and dialkyl esters of dicarboxylic acids to form polyesters |
摘要 |
The present invention relates to a process for copolymerizing a dicarboxylic acid, a dialkyl ester, and a diol in the presence of a transesterification catalyst. The process involves heating a mixture containing carboxylic acids and esters in excess diol at elevated temperatures in the presence of a transesterification catalyst and returning any vaporized diol to the reaction vessel until the theoretical amount of alcohol and/or water have been evolved. The alcohol and/or water of reaction is not allowed to return to the vessel. When the theoretical weight of alcohol and/or water is collected, the excess diol is removed and the polymerization is allowed to proceed.
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申请公布号 |
US5296587(A) |
申请公布日期 |
1994.03.22 |
申请号 |
US19930034963 |
申请日期 |
1993.03.22 |
申请人 |
EASTMAN CHEMICAL COMPANY |
发明人 |
SUMNER, JR., CHARLES E.;BOONE, GARY D. |
分类号 |
C08G63/16;C08G63/78;C08G63/80;(IPC1-7):C08G63/78 |
主分类号 |
C08G63/16 |
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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