Polymerizer device for producing an aromatic polycarbonate

Details Polymerizer device for producing an aromatic polycarbonate Polymerizer device for producing an aromatic polycarbonate

2005-06-16

2009-06-09

Boykin, Terressa M (Department: 1796)

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From phenol, phenol ether, or inorganic phenolate

C422S131000, C524S306000, C524S312000, C524S315000, C524S317000, C528S198000

Reexamination Certificate

active

07544760

ABSTRACT:
It is a task of the present invention to provide a polymerizer device and a polymerizer system which enable the production, by melt transesterification, of a high quality, high performance aromatic polycarbonate (which is colorless and has excellent mechanical properties) from a molten aromatic polycarbonate prepolymer obtained by reacting an aromatic dihydroxy compound with a diaryl carbonate, wherein the polycarbonate can be stably produced on a commercial scale at 1 to 50 t/hr for a long time. In the present invention, this task has been accomplished by a guide-wetting fall polymerizer device (in which a molten prepolymer is allowed to fall along and in contact with a guide, thereby effecting polymerization of the prepolymer) having a specific structure and a polymerizer system comprising such devices. That is, the device and the system have enabled the stable production of a high quality, high performance aromatic polycarbonate as mentioned above at 1 to 50 t/hr for a long time (more than several thousand hours, e.g., as long as 5,000 hours) without fluctuation of the molecular weight thereof.

REFERENCES:
patent: 3888826 (1975-06-01), Yamana et al.
patent: 5747609 (1998-05-01), Komiya et al.
patent: 5840826 (1998-11-01), Komiya et al.
patent: 6265526 (2001-07-01), Komiya et al.
patent: 6320015 (2001-11-01), Komiya et al.
patent: 6429276 (2002-08-01), Komiya et al.
patent: 2007/0197763 (2007-08-01), Fukuoka et al.
patent: 1048685 (2000-11-01), None
patent: 1007302 (1965-10-01), None
patent: 52-36159 (1977-09-01), None
patent: 2-153923 (1990-06-01), None
patent: 8-225641 (1996-09-01), None
patent: 8-225643 (1996-09-01), None
patent: 8-325373 (1996-12-01), None
patent: 10-81741 (1998-03-01), None
patent: 10-298279 (1998-11-01), None
patent: 2004-211107 (2004-07-01), None
patent: WO-97/22650 (1997-06-01), None
patent: WO-99/36457 (1999-07-01), None
patent: WO-99/64493 (1999-12-01), None
patent: WO-99/65970 (1999-12-01), None

Affiliated with

Also associated with

Rating

Polymerizer device for producing an aromatic polycarbonate does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Polymerizer device for producing an aromatic polycarbonate, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Polymerizer device for producing an aromatic polycarbonate will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4067856