发明名称 |
PROCESS FOR THE PRODUCTION OF HIGH MOLECULAR WEIGHT POLYESTER |
摘要 |
A process for the continuous production of high molecular weight polyethylene terephthalate wherein the crystallized prepolymer having an intrinsic viscosity of at least 0.3 is dried, preheated and polymerized in a single moving bed reaction zone. The method is characterized by an inert gas atmosphere and a reaction zone with a temperature gradiant ranging from about 170 DEG C. at the uppermost portion and a higher temperature of about 225 DEG C. at the lowermost portion. |
申请公布号 |
ZA8300357(B) |
申请公布日期 |
1983.10.26 |
申请号 |
ZA19830000357 |
申请日期 |
1983.01.19 |
申请人 |
THE GOODYEAR TIRE & RUBBER CO |
发明人 |
DUH BEN |
分类号 |
C08G63/00;C08G63/78;C08G63/80 |
主分类号 |
C08G63/00 |
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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