Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Process of treating scrap or waste product containing solid...
Reexamination Certificate
2007-05-10
2010-10-12
Boykin, Terressa M (Department: 1796)
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Process of treating scrap or waste product containing solid...
C359S107000, C428S411100, C428S412000, C521S172000, C521S173000, C524S115000, C524S127000, C524S140000, C524S508000, C525S131000, C525S148000, C525S208000, C525S403000, C528S196000, C528S198000, C528S271000, C528S272000, C528S500000
Reexamination Certificate
active
07812061
ABSTRACT:
A method for manufacturing a recycled polycarbonate raw material for a flame retardant resin composition from discarded and/or recovered optical discs using a polycarbonate resin as a substrate material, and includes (a) a step to identify if 2,2-bis(4-hydroxyphenyl)propane as a divalent phenol of the polycarbonate resin raw material is polymerized as the sole raw material in the polycarbonate resin as the substrate material of the discarded and/or recovered optical discs and (b) a step to remove impurities by a chemical treatment by separating only the discarded and/or recovered optical discs, wherein the polycarbonate resin is identified as polymerized by using 2,2-bis(4-hydroxyphenyl)propane as the sole raw material. Accordingly, used optical discs using a PC resin as a substrate material and discarded optical discs as substandard articles in a manufacturing step can be reused as a raw material for a flame retardant polycarbonate resin composition by treating with a method at low cost and a low environmental load.
REFERENCES:
patent: 2005/0203196 (2005-09-01), Hasegawa et al.
patent: 2005/0261414 (2005-11-01), Mitsuhashi et al.
patent: 2007/0179233 (2007-08-01), Isozaki et al.
patent: 2009/0170969 (2009-07-01), Ogasawara
patent: 7 286064 (1995-10-01), None
patent: 2003 041049 (2003-02-01), None
patent: 2003 231120 (2003-08-01), None
patent: 2004 74507 (2004-03-01), None
patent: 2006 036668 (2006-02-01), None
patent: 2006-104380 (2006-04-01), None
patent: 2006 104380 (2006-04-01), None
Boykin Terressa M
Idemitsu Kosan Co. Ltd.
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
LandOfFree
Process for the production of recycled polycarbonate as raw... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Process for the production of recycled polycarbonate as raw..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the production of recycled polycarbonate as raw... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4240136