发明名称 |
PROCESS FOR PRODUCING POLYALKYLENE TEREPHTHALATE, PROCESS FOR PRODUCING POLYALKYLENE TEREPHTHALATE MOLDING AND POLYALKYLENE TEREPHTHALATE MOLDING |
摘要 |
The present invention provides a method of producing polyalkylene terephthalate, which comprises: introducing a prepolymer of polyalkylene terephthalate that is in a molten state comprising 70 mol% or more of ethylene terephthalate or 1,4-butylene terephthalate repeating units and having an intrinsic viscosity [·] between 0.2 and 2 dl/g through a feed opening to a polymerization reactor; discharging the introduced prepolymer from holes of a perforated plate; and polymerizing the prepolymer under reduced pressure, while allowing the prepolymer to fall along the surface of a support that is open towards the outside at a temperature between the [crystalline melting point - 10°C] of the prepolymer or higher and the [crystalline melting point + 30°C] of the prepolymer or lower under the conditions represented by a formula S 1 /S 2 > 1, wherein S 1 is the surface area of falling polyalkylene terephthalate, and S 2 is the area where the support is in contact with polyalkylene terephthalate. |
申请公布号 |
EP1671999(A4) |
申请公布日期 |
2008.03.26 |
申请号 |
EP20040792166 |
申请日期 |
2004.10.07 |
申请人 |
ASAHI KASEI CHEMICALS CORPORATION |
发明人 |
YOKOYAMA, HIROSHI;FUJIMOTO, KATSUHIRO;AMINAKA, MUNEAKI;SUGIMOTO, JUNICHI;KATSUMATA, TSUTOMU |
分类号 |
C08G63/78;C08G63/183 |
主分类号 |
C08G63/78 |
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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