Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – From phenol – phenol ether – or inorganic phenolate
Reexamination Certificate
2006-09-06
2009-02-03
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
C264S176100, C264S219000, C422S129000, C528S198000, C528S310000
Reexamination Certificate
active
07485695
ABSTRACT:
Polycarbonate is prepared by reactive extrusion on a reactive extruder. A method incorporates the steps of introducing a polycarbonate oligomer, an activated carbonate, and a transesterification catalyst to the extruder through a feed section. The extruder has a feed section, a polycarbonate exit section, and a reaction section between the feed section and the polycarbonate exit section. The reaction section has one or more devolatilization units, wherein each devolatilization unit incorporates an array of vent-conveying sections and conveying sections arranged in a configuration of: (C V C)x(V)n, and/or (V C V)x(C)n. (V) is a vent-conveying section, (C) is a conveying section, x is 1 or more, and n is 1 or 0. The extruder screw in the vent-conveying sections and the conveying sections in each devolatilization unit have conveying elements or conveying elements and mixing elements and no elements that create a melt seal in the devolatilization unit. The method further includes the step of extruding the reaction components at a temperature in a range between 100° C. and 500° C., wherein during the extrusion of the reaction components, activated carbonate residue is removed through the vent-conveying sections.
REFERENCES:
patent: 4323668 (1982-04-01), Brunelle
patent: 5091591 (1992-02-01), Cipullo
patent: 5151491 (1992-09-01), Sakashita et al.
patent: 5276129 (1994-01-01), Sakashita et al.
patent: 5525701 (1996-06-01), Tominari et al.
patent: 5696222 (1997-12-01), Kaneko et al.
patent: 6177536 (2001-01-01), Anamizu et al.
patent: 6252036 (2001-06-01), Hatono et al.
patent: 6300459 (2001-10-01), Kaneko et al.
patent: 6303734 (2001-10-01), Funakoshi et al.
patent: 6399739 (2002-06-01), McCloskey et al.
patent: 6403754 (2002-06-01), McCloskey et al.
patent: 6410777 (2002-06-01), Kaneko et al.
patent: 6417291 (2002-07-01), Kaneko et al.
patent: 6420512 (2002-07-01), McCloskey et al.
patent: 6420588 (2002-07-01), McCloskey et al.
patent: 6469192 (2002-10-01), Burnell et al.
patent: 6500914 (2002-12-01), Brack et al.
patent: 6506871 (2003-01-01), Silvi et al.
patent: 6518391 (2003-02-01), McCloskey et al.
patent: 6525163 (2003-02-01), Brack et al.
patent: 6548623 (2003-04-01), Brunelle et al.
patent: 6590068 (2003-07-01), Brack et al.
patent: 6600004 (2003-07-01), McCloskey et al.
patent: 6653434 (2003-11-01), Brack et al.
patent: 6706846 (2004-03-01), Brack et al.
patent: 6710156 (2004-03-01), Whitney et al.
patent: 6723823 (2004-04-01), McCloskey et al.
patent: 6734277 (2004-05-01), Brack et al.
patent: 6747119 (2004-06-01), Brack et al.
patent: 6790929 (2004-09-01), Silvi et al.
patent: 2002/0132957 (2002-09-01), Brack et al.
patent: 2003/0050427 (2003-03-01), Brunelle et al.
patent: 2003/0232957 (2003-12-01), Silvi et al.
patent: 2004/0068086 (2004-04-01), Day et al.
patent: 2004/0087756 (2004-05-01), Ramesh et al.
patent: 2005/0234211 (2005-10-01), Martinez et al.
patent: 2006/0069228 (2006-03-01), McCloskey et al.
patent: 2439552 (1976-02-01), None
patent: 5009282 (1993-01-01), None
patent: 10101786 (1998-04-01), None
patent: 10101787 (1998-04-01), None
patent: 11302228 (1999-11-01), None
patent: 2000129112 (2000-05-01), None
patent: 2002309015 (2002-10-01), None
patent: 03/010220 (2003-02-01), None
patent: 03040208 (2003-05-01), None
patent: 03106149 (2003-12-01), None
Davis Peter
Looij Hans
Boykin Terressa M
Marina Larson & Associates LLC
Sabic Innovative Plastics IP B.V
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