METHOD FOR RECYCLING OF PHENOLIC ANTIOXIDANT AGENT, PROCESS FOR PRODUCTION OF OLEFIN POLYMER, POLYOLEFIN POWDER, AND FIBERS

WIPO Patent Application WO/2011/027793

A1

Disclosed are: a method for reproducing a phenolic compound from a phenolic antioxidant agent that has been masked with an organoaluminum compound and is contained in an olefin polymer produced while supplying the phenolic antioxidant agent during polymerization, effectively on an industrial scale and in a simple manner; and an olefin polymer produced by the method. Specifically disclosed is a phenolic antioxidant agent recycling method which can reproduce a phenolic compound from a phenolic antioxidant agent that has been masked with an organoaluminum compound and is contained in an olefin polymer produced while supplying the phenolic antioxidant agent during polymerization. The method comprises bringing the olefin polymer with a nitrogen gas which comprises nitrogen and water and/or a proton-donating substance at a ratio of 1 : 1.0×10-6 to 2.5×10-2 by volume.

KAWAMOTO NAOSHI (JP)
AYABE TAKASHI (JP)
URUSHIHARA TSUYOSHI (JP)
OKAMOTO KOHEI (JP)
SEGUCHI TETSUYA (JP)

PCT/JP2010/064954

March 10, 2011

September 01, 2010

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ADEKA CORP (JP)
KAWAMOTO NAOSHI (JP)
AYABE TAKASHI (JP)
URUSHIHARA TSUYOSHI (JP)
OKAMOTO KOHEI (JP)
SEGUCHI TETSUYA (JP)

C08F6/00; C08F2/44; C08F4/64; C08F10/00; C08K5/13; C08K9/04; C08L23/00

JP2005255953A	2005-09-22
JP2006052241A	2006-02-23
JP2006282985A	2006-10-19
JP2005206625A	2005-08-04
JPH10183423A	1998-07-14
JPH05271335A	1993-10-19
JP2005255953A	2005-09-22
JP2006052241A	2006-02-23
JP2006282985A	2006-10-19
JPH10183423A	1998-07-14
JPS573842A	1982-01-09
JPS6392613A	1988-04-23

See also references of EP 2474561A4

HONDA ICHIRO (JP)
Ichiro Honda (JP)

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