METHOD FOR RECOVERING POLYCARBONATE RESIN FROM DISCARDED OPTICAL DISC AND/OR RECOVERED OPTICAL DISC, FLAME-RETARDANT POLYCARBONATE RESIN COMPOSITION, INJECTION MOLDED BODY, AND MOLDED ARTICLE FOR OPTICAL USE

Title:

Document Type and Number:

WIPO Patent Application WO/2011/078334

Kind Code:

A1

Abstract:

Disclosed is a method for recovering a polycarbonate resin from a discarded optical disc and/or a recovered optical disc, said optical disc comprising a polycarbonate resin substrate. Specifically, a discarded optical disc and/or a recovered optical disc is crushed, then the thus-crushed material is subjected to chemical treatment, and the following processes (I) and (II) are carried out on the chemically treated material. Process (I): a process which comprises (a) a step in which a magnetic metal foreign material is removed using a magnet, and (b) a step in which a colored foreign material is selected using an optical camera and the colored foreign material is removed Process (II): a process in which the presence or absence of a metal foreign material is detected using a metal foreign material detector and a resin containing a metal foreign material is removed

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Inventors:

ISOZAKI TOSHIO (JP)
MITSUHASHI KENICHI (JP)
ITO NOBUYUKI (JP)

Application Number:

PCT/JP2010/073365

Publication Date:

June 30, 2011

Filing Date:

December 24, 2010

Export Citation:

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Assignee:

IDEMITSU KOSAN CO (JP)
PANAC IND INC (JP)
ISOZAKI TOSHIO (JP)
MITSUHASHI KENICHI (JP)
ITO NOBUYUKI (JP)

International Classes:

B29B17/02; B03C1/00; B29B17/04; C08J11/00; C08L69/00; G11B7/253; G11B7/2534; G11B7/26

Foreign References:

JP2007276349A	2007-10-25
JP2010099618A	2010-05-06
JP2002028927A	2002-01-29
JPH0881620A	1996-03-26
JP2007276349A	2007-10-25
JPH03292359A	1991-12-24
JPH04202465A	1992-07-23
JPH08302178A	1996-11-19
JPH107897A	1998-01-13

Other References: