Optically anisotropic element comprising discotic compound

Details Optically anisotropic element comprising discotic compound Optically anisotropic element comprising discotic compound

2008-01-01

2008-01-01

Wu, Shean C (Department: 1756)

Stock material or miscellaneous articles

Liquid crystal optical display having layer of specified...

C252S299620, C560S080000

Reexamination Certificate

active

11041314

ABSTRACT:
An optically anisotropic element comprises a discotic compound. The discotic compound has an oriented discotic plane. The discotic compound has a molecular structure including a discotic core and 3 to 20 combinations of ester bonds (—O—CO—) and 1- or 2-alkenyl groups. The alkenyl group can have a polymerizable group as a substituent group positioned at the terminal. A polymerizable discotic compound having an oriented discotic plane can be polymerized to form an optically anisotropic element. Alignment of the oriented discotic plane is fixed by polymerization. A new triphenylene compound is also disclosed.

REFERENCES:
patent: 4333709 (1982-06-01), Dubois et al.
patent: 6461694 (2002-10-01), Nishikawa et al.
patent: 09-138413 (1997-05-01), None
patent: 2000-86591 (2000-03-01), None
Englidh translation by computer for JP 2000-086591, http://www4.ipdl.ncipi.go.jp/Tokujitu/PAJdetail.ipdl?N0000=60&N0120=01&N2001=2&N3001=2000-086591.
CAPLUS 2000: 198008.
English translation by computer for JP 09-138413, http://www4.ipdl.inpit.go.jp/Tokujitu/PAJdetail.ipdl?N0000=60&N0120=01&N2001=2&N3001=H09-138413.
CAPLUS 1994: 322477.

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