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Title:
PHTHALOCYANINE COMPOUNDS, PROCESS FOR PRODUCING THE SAME, AND NEAR INFRARED ABSORBENT COMPRISING THE SAME
Document Type and Number:
WIPO Patent Application WO/2000/060014
Kind Code:
A1
Abstract:
Novel phthalocyanine compounds which have absorption in a near-infrared region of from 700 to 1,000 nm and reduced absorption in the visible region and hence are suitable for use in a near-infrared absorption filter for plasma displays, a secret ink, etc. The compounds are represented by general formula (I). The near infrared absorbent is characterized by comprising any of the compounds. (In the formula, R¿1? to R¿8? each represents alkyl or alkoxyalkyl; X¿1? to X¿8? each represents sulfur or $m(g)NR¿9?, provided that X¿1?, one of X¿3? and X¿4?, one of X¿5? and X¿6?, and one of X¿7? and X¿8? each is sulfur and that X¿2?, the other of X¿3? and X¿4?, the other of X¿5? and X¿6?, and the other of X¿7? and X¿8? each is $m(g)NR¿9?; R¿9? represents optionally substituted acyl or optionally substituted aroyl; and M represents two hydrogen atoms, a divalent metal, or a derivative of a trivalent or tetravalent metal).

Inventors:
TERAO HIROSHI (JP)
FUJITA SHIGEO (JP)
KUMAGAE YOJIRO (JP)
Application Number:
PCT/JP2000/001927
Publication Date:
October 12, 2000
Filing Date:
March 29, 2000
Export Citation:
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Assignee:
YAMAMOTO CHEMICALS INC (JP)
TERAO HIROSHI (JP)
FUJITA SHIGEO (JP)
KUMAGAE YOJIRO (JP)
International Classes:
B41M5/26; B41N1/14; C07D487/22; C09B47/00; C09B47/06; C09B47/08; C09B47/18; C09B47/20; C09B47/22; C09K3/00; G03G5/06; (IPC1-7): C09B47/22; B41N1/14; C07D513/22; C09K3/00
Foreign References:
EP0782164A11997-07-02
Other References:
See also references of EP 1085057A4
Attorney, Agent or Firm:
Morioka, Hiroshi (5th floor 11-13, Higashi-temma 1-chome Kita-ku Osaka-shi Osaka, JP)
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