| 发明名称 |
Production of tetramethylene terephthalate polymers using 225{20 {0 to 248{20 {0 C. polycondensation temperature |
| 摘要 |
1,4-Butanediol and a dialkyl benzenedicarboxylate such as dimethyl terephthalate are subjected to transesterification conditions and thereafter to polycondensation in the presence of a tetraalkyl titanate catalyst at a temperature within the range of 225 DEG to 248 DEG C.
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| 申请公布号 |
US4049635(A) |
申请公布日期 |
1977.09.20 |
| 申请号 |
US19760649951 |
申请日期 |
1976.01.19 |
| 申请人 |
PHILLIPS PETROLEUM COMPANY |
发明人 |
CLEARY, JAMES W. |
| 分类号 |
C08G63/78;(IPC1-7):C08G63/14 |
主分类号 |
C08G63/78 |
| 代理机构 |
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代理人 |
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