发明公开
- 专利标题： Improved process for the production of polyphenyleneoxide
- 专利标题（中）： 改进的聚苯醚生产工艺
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申请号： EP84201712.1申请日： 1984-11-26
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公开(公告)号： EP0144106A1公开(公告)日： 1985-06-12
- 发明人: Penczek, Irena , Bialy, Jan , Dobkowski, Zbignev
- 申请人： ENICHEM S.p.A.
- 申请人地址： Via Medici del Vascello 26 I-20138 Milano IT
- 专利权人： ENICHEM S.p.A.
- 当前专利权人： ENICHEM S.p.A.
- 当前专利权人地址： Via Medici del Vascello 26 I-20138 Milano IT
- 代理机构： Roggero, Sergio (IT)
- 优先权： IT2402683 19831205
- 主分类号： C08G65/44
- IPC分类号： C08G65/44 ; G01N11/06
摘要：
Process for the production of polyphenylenexoxide, in which:
- oxygen, or a gas containing molecular oxygen is fed into a liquid reaction medium, solvent of the 2,6-xylenol and of the catalyst cupric salt complexed with an organic base, but nor solvent or substantially not solvent of the polyphenyleneoxide;
- from time to time samples are collected of the reaction mixture, said samples are treated with a liquid solvent, capable of dissolving polyphenyleneoxide and of stopping the growth of the macromolecules, until a clear and homogeneous solution is obtained;
- the through time of the so obtained solution is measured in a capillary tube viscometer and the value is determined of the viscosity and/of the molecular weight of polyphenyleneoxide by the comparison with standard values; and
- on the basis of the so determined value of the viscosity and or of the polyphenyleneoxide molecular weight interventions are effected on the oxidative polymerizing reaction of 2,6-xylenol.
- oxygen, or a gas containing molecular oxygen is fed into a liquid reaction medium, solvent of the 2,6-xylenol and of the catalyst cupric salt complexed with an organic base, but nor solvent or substantially not solvent of the polyphenyleneoxide;
- from time to time samples are collected of the reaction mixture, said samples are treated with a liquid solvent, capable of dissolving polyphenyleneoxide and of stopping the growth of the macromolecules, until a clear and homogeneous solution is obtained;
- the through time of the so obtained solution is measured in a capillary tube viscometer and the value is determined of the viscosity and/of the molecular weight of polyphenyleneoxide by the comparison with standard values; and
- on the basis of the so determined value of the viscosity and or of the polyphenyleneoxide molecular weight interventions are effected on the oxidative polymerizing reaction of 2,6-xylenol.
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