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Title:
OPTICAL FILM
Document Type and Number:
Japanese Patent JP2009003439
Kind Code:
A
Abstract:

To provide: an optical film having high birefringence, that is, a large phase-difference in a surface direction of a film and in a depth direction thereof, the optical film being useful as a retardation film; an optical member having the optical film; and a method of manufacturing the optical film.

The optical film is the random copolymer with the chain olefin and norbornenes as the polymerization components. At the diad part and the triad part where the units of the norbornenes are connected, the solid regularity of the diad part is controlled and the copolymer is constituted by the copolymer containing the triad part at a specific rate. In the solid arrangement of the diad part of the copolymer, the rate of the meso type to the racemo type (former/latter in mole ratio) is 0.5 to 20, and the triad part may be contained by 1 to 30 mole% to the unit of whole norbornenes in the copolymer.


Inventors:
Okuyama, Naoto
Ishikawa, Sae
Tei, Takahiro
Application Number:
JP2008000131614
Publication Date:
January 08, 2009
Filing Date:
May 20, 2008
Export Citation:
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Assignee:
DAICEL CHEM IND LTD
International Classes:
G02B5/30; C08F210/02; C08F232/04; C08J5/18
Domestic Patent References:
JP2004107442A
JP2006276672A
JP2007010863A
Foreign References:
WO2007060723A1
WO2006057309A1
WO2006030797A1
Attorney, Agent or Firm:
鍬田 充生
阪中 浩