Alkylphthalocyanine near-infrared absorbers and recording/displa

Details Alkylphthalocyanine near-infrared absorbers and recording/displa Alkylphthalocyanine near-infrared absorbers and recording/displa

1991-02-26

1996-12-10

Tucker, Philip

Compositions

Light transmission modifying compositions

Infrared

540122, 540139, 540140, F21V 904, C09B 4704

Patent

active

055827748

ABSTRACT:
Near-infrared absorbers which contain phthalocyanine derivatives in which the four benzene rings contained in the molecule independently have 1 to 4 substituents are light and thermal resistant and possess high molar extinction coefficients. Such near-infrared absorbers are useful in optical recording media, near-infrared absorption filters, and liquid crystal display devices.

REFERENCES:
patent: 4529688 (1985-07-01), Law et al.
patent: 4606859 (1986-08-01), Duggan et al.
patent: 5296162 (1994-03-01), Itoh et al.
patent: 5446141 (1995-08-01), Itoh et al.
Cook, et al., J. Chem. Soc., Chem. Commun., pp. 1086-1088, (1987).

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