Near infrared absorption filter

Details Near infrared absorption filter Near infrared absorption filter

C - Chemistry, Metallurgy

08

K

C08K 5/37 (2006.01) G02B 1/04 (2006.01) G02B 5/20 (2006.01)

Patent

CA 2289335

The present invention provides a near infrared absorption filter which contains, in a resin film produced from either or both of a polycarbonate and a polyarylate by solution casting, a dithiol-nickel complex represented by the following formula (1): (see formula I) and at least one kind of diimmonium compound represented by the following formula (2): (see formula II) (wherein R1 to R8 may be the same or different and are each a hydrogen atom, an alkyl group or an aryl group; and X- is an anion represented by halogen anion, perchloric acid anion, antimony hexafluoride anion or nitric acid anion). The near infrared absorption filter has alleviated the problems of the prior art, has excellent heat resistance, shows stable absorption over a long period of time, has a high transmittance for visible light and high absorption for near infrared light, and is suitably used particularly as a near infrared absorption filter for plasma display panel.

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