发明名称 |
PROCESS FOR THE CRYSTALLIZATION OF POLYETHYLENE NAPHTHALATE PREPOLYMERS AND THE SOLID STATING OF THOSE CRYSTALLIZED PREPOLYMERS |
摘要 |
A process is disclosed for the crystallization of a PEN prepolymer containing volatile components. The temperature is maintained at a temperature in the range of about 20 DEG C above the Tg and about 10 DEG C below the Tm while the PEN prepolymer is agitated. The PEN prepolymer is present as chips or pellets. The pressure during crystallization is maintained at a level higher than the vapor pressure of the volatile components in the PEN prepolymer chips or pellets, suitably by the presence of a gas and/or a liquid or mixture of liquids.
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申请公布号 |
WO9818847(A1) |
申请公布日期 |
1998.05.07 |
申请号 |
WO1997EP06043 |
申请日期 |
1997.10.29 |
申请人 |
SHELL INTERNATIONALE RESEARCH MAATSCHAPPIJ B.V.;SHELL CANADA LIMITED |
发明人 |
DUH, BEN |
分类号 |
B29B13/02;C08G63/185;C08G63/80;C08G63/88;(IPC1-7):C08G63/88 |
主分类号 |
B29B13/02 |
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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