Title:
LIGHT-SHIELDING AGENT
Document Type and Number:
WIPO Patent Application WO/2007/148621
Kind Code:
A1
Abstract:
An object is to provide a light-shielding agent which can effectively intercept
an undesirable artificial light (particularly, a near infrared ray) emitted
from an image display device in a front member of the image display device, which
can also effectively intercept a near infrared ray in natural light, and which
is excellent in solubility in an organic solvent, light resistance and environment
resistance, and also provide use of the light-shielding agent. Another object
is to elongate the absorption wavelength of a cyanine dye and achieve a desirable
absorption wavelength in the cyanine dye. Thus, disclosed is a light-shielding
agent comprising a cyanine dye having a sulfonyl group at the meso-position represented
by the general formula 1. [General formula 1] wherein Z1 and Z2
independently represent a monocyclic or fused-cyclic aromatic or heterocyclic
ring which may have a substituent; R1 to R6 independently
represent an aliphatic hydrocarbon group or an aromatic hydrocarbon group which
may have a substituent, provided that R3 and R4 or R5
and R6 may together form a 3- to 8-membered ring; R7 represents
a hydrogen atom or a substituent; L represents a group of atoms required for the
formation of a cyclic structure; Xm- represents a counter ion having
a valency of m; m represents an integer ranging from 1 to 3; and c is 0 or 1.
Inventors:
YANO, Kentaro (2-3 Shimoishii 1-chom, Okayama-shi Okayama 07, 7000907, JP)
矢野 賢太郎 (〒07 岡山県岡山市下石井１丁目２番３号 株式会社林原生物化学研究所内 Okayama, 7000907, JP)
NAGAIKE, Hiroshi (2-3 Shimoishii 1-chom, Okayama-shi Okayama 07, 7000907, JP)
永池 宏 (〒07 岡山県岡山市下石井１丁目２番３号 株式会社林原生物化学研究所内 Okayama, 7000907, JP)
矢野 賢太郎 (〒07 岡山県岡山市下石井１丁目２番３号 株式会社林原生物化学研究所内 Okayama, 7000907, JP)
NAGAIKE, Hiroshi (2-3 Shimoishii 1-chom, Okayama-shi Okayama 07, 7000907, JP)
永池 宏 (〒07 岡山県岡山市下石井１丁目２番３号 株式会社林原生物化学研究所内 Okayama, 7000907, JP)
Application Number:
JP2007/062091
Publication Date:
December 27, 2007
Filing Date:
June 15, 2007
Export Citation:
Assignee:
KABUSHIKI KAISHA HAYASHIBARA SEIBUTSU KAGAKU KENKYUJO (2-3 Shimoishii 1-chome, Okayama-shi Okayama, 07, 7000907, JP)
株式会社林原生物化学研究所 (〒07 岡山県岡山市下石井１丁目２番３号 Okayama, 7000907, JP)
YANO, Kentaro (2-3 Shimoishii 1-chom, Okayama-shi Okayama 07, 7000907, JP)
矢野 賢太郎 (〒07 岡山県岡山市下石井１丁目２番３号 株式会社林原生物化学研究所内 Okayama, 7000907, JP)
NAGAIKE, Hiroshi (2-3 Shimoishii 1-chom, Okayama-shi Okayama 07, 7000907, JP)
株式会社林原生物化学研究所 (〒07 岡山県岡山市下石井１丁目２番３号 Okayama, 7000907, JP)
YANO, Kentaro (2-3 Shimoishii 1-chom, Okayama-shi Okayama 07, 7000907, JP)
矢野 賢太郎 (〒07 岡山県岡山市下石井１丁目２番３号 株式会社林原生物化学研究所内 Okayama, 7000907, JP)
NAGAIKE, Hiroshi (2-3 Shimoishii 1-chom, Okayama-shi Okayama 07, 7000907, JP)
International Classes:
C09K3/00; C09B23/00; G02B5/22