发明名称 |
Polyalkylene arylates containing a high proportion of carboxyl end groups |
摘要 |
A process for preparing polyalkylene arylates by esterifying or transesterifying an aromatic dicarboxylic acid or its esters or ester-forming derivatives with a molar excess of an aliphatic dihydroxy compound and polycondensing the resultant esterification or transesterification product comprises polycondensing the prepolymer with a viscosity number (VN) of <30 ml/g in the presence of an oxygen-containing gas.
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申请公布号 |
US6232435(B1) |
申请公布日期 |
2001.05.15 |
申请号 |
US20000646174 |
申请日期 |
2000.09.14 |
申请人 |
BASF AKTIENGESELLSCHAFT |
发明人 |
HEITZ THOMAS;HEEL HELMUT;BRAUNE PETER;KLATT MARTIN |
分类号 |
C08J5/00;C08G63/183;C08G63/78;C08L67/02;C08L69/00;C08L77/00;(IPC1-7):C08F6/00 |
主分类号 |
C08J5/00 |
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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