Title:
CHROMENE COMPOUND
Document Type and Number:
WIPO Patent Application WO/2010/150905
Kind Code:
A1
Abstract:
A chromene compound which comprises a skeleton represented by formula (1), shows a high color density and double peak properties under light irradiation, enables reduced initial coloration and has practically usable fading speed and durability. In formula (1), R1 represents an electron-donating group having a Hammett's constant less than 0; the ring containing X is a heterocycle formed by X together with the carbon atoms at the 7- and 8-positions; and X represents an oxygen atom, a sulfur atom or a group represented by =NR2 that is directly bonded to the carbon atom at the 7-position.
Inventors:
TAKAHASHI TOSHIAKI (JP)
TAKENAKA JUNJI (JP)
TERANISHI KAZUHIRO (JP)
TAKENAKA JUNJI (JP)
TERANISHI KAZUHIRO (JP)
Application Number:
PCT/JP2010/060936
Publication Date:
December 29, 2010
Filing Date:
June 22, 2010
Export Citation:
Assignee:
TOKUYAMA CORP (JP)
TAKAHASHI TOSHIAKI (JP)
TAKENAKA JUNJI (JP)
TERANISHI KAZUHIRO (JP)
TAKAHASHI TOSHIAKI (JP)
TAKENAKA JUNJI (JP)
TERANISHI KAZUHIRO (JP)
International Classes:
C07D491/107; C07D493/10; C08K5/151; C08L101/00; C09K9/02; G02B5/23
Domestic Patent References:
| WO2001060811A1 | 2001-08-23 | |||
| WO2005028465A1 | 2005-03-31 | |||
| WO2003044022A2 | 2003-05-30 | |||
| WO2003025638A1 | 2003-03-27 | |||
| WO2001019813A1 | 2001-03-22 |
Other References:
See also references of EP 2447267A4
Attorney, Agent or Firm:
OSHIMA MASATAKA (JP)
Masataka Oshima (JP)
Masataka Oshima (JP)
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