DIIMMONIUM COMPOUND AND USE THEREOF

Title:

DIIMMONIUM COMPOUND AND USE THEREOF

Document Type and Number:

WIPO Patent Application WO/2006/028006

Kind Code:

A1

Abstract:

Disclosed is a near infrared absorbing compound which does not contain antimony or arsenic and has excellent stability, especially excellent heat resistance, light resistance and wet heat resistance. Also disclosed are a near-infrared absorbing filter, which is produced by using the near infrared absorbing compound and has excellent resistance such as light resistance and heat resistance, an optical filter and an optical recording medium. Specifically disclosed are a diimmonium compound represented by the formula (1) below and a near-infrared absorbing filter obtained by using such a diimmonium compound. Further specifically disclosed are a near-infrared absorbing filter wherein an adhesive layer containing the diimmonium compound is arranged on a transparent supporting body, and an optical filter using such a near-infrared absorbing filter. (1) (In the formula (1), R₁-R₈ independently represent a hydrogen atom or an optionally substituted aliphatic hydrocarbon residue; R₉-R₁₁ independently represent an aliphatic hydrocarbon residue which may have a halogen atom; and rings A and B may further have a substituent.)

Inventors:

IKEDA MASAAKI (JP)
KURATA TAKAAKI (JP)
KANEKO SYOUICHI (JP)
SEGAWA JUNICHI (JP)

Application Number:

PCT/JP2005/016094

Publication Date:

March 16, 2006

Filing Date:

September 02, 2005

Export Citation:

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Assignee:

NIPPON KAYAKU KK (JP)
IKEDA MASAAKI (JP)
KURATA TAKAAKI (JP)
KANEKO SYOUICHI (JP)
SEGAWA JUNICHI (JP)

International Classes:

C07C251/30; B41M5/26; C09K3/00; G02B5/22; G11B7/244

Domestic Patent References:

WO2004068199A1	2004-08-12
WO2004048480A1	2004-06-10
WO2004068199A1	2004-08-12
WO2004068199A1	2004-08-12
WO2004048480A1	2004-06-10

Foreign References:

JPS6438490A	1989-02-08
JP2000227515A	2000-08-15
JPH10180922A	1998-07-07
JP2005049848A	2005-02-24
EP1403666A1	2004-03-31
JPH10316633A	1998-12-02
JP4325335B2	2009-09-02
JP2000227515A	2000-08-15
JP2005049848A	2005-02-24

Other References: