Patent ID: 6875512
Filing Date: 2005-04-05
Classification: C08K,G02B,Y10T

Abstract:
1. An optical filter which comprises a transparent support and a filter layer containing a dye and a binder polymer, wherein the dye is in an aggregated form exhibiting an absorption maximum in the wavelength region of 750 to 1,100 nm, and wherein the support, the filter layer or an optional layer contains an ultraviolet absorbing agent represented by the formula (I), (II), (III), (IV), (V), (VI), (VII) or (VIII): in which the benzene rings a and b may have a substituent group; in which Ar 1 is an aryl group or an aromatic heterocyclic group, -L- is a single bond or —O—, and the benzene ring c may have a substituent group; in which the benzene ring d and the triazine ring e may have a substituent group, and the benzene ring d may be condensed with another aromatic ring or a heterocyclic ring; in which the benzcne rings f and g may have a substituent group; in which Ar 2 is an aryl group or an aromatic heterocyclic group; R 1 is hydrogen or an alkyl group; and each of R 2 and R 3 independently is cyano, —COR 13 , —COOR 14 , —CONR 15 R 16 , —SO 2 R 17 or —SO 2 NR 18 R 19 , wherein each of R 13 , R 14 , R 15 , R 16 , R 17 , R18 and R 19 independently is hydrogen, an alkyl group, a substituted alkyl group or an aryl group, or R 2 and R 3 are combined to form a five-membered or six-membered ring; in which each of R 4 and R 5 independently is hydrogen, an alkyl group or an aryl group, or and R 5 are combined to form a five-membered or six-membered ring; and each of R 6 and R 7 independently is cyano, —COR 20 , —COOR 21 , —CONR 22 R 23 , —SO 2 R 24 or —SO 2 NR 25 R 26 , wherein each of R 20 , R 21 , R 22 , R 23 , R 24 , R 25 and R 26 independently is hydrogen, an alkyl group, a substituted alkyl group or an aryl group, or R 6 and R 7 are combined to form a five-membered or six-membered ring; in which R 8 is an alkyl group, a substituted alkyl group or an aryl group; each of R 9 and R 10 independently is cyano, —COR 27 , —COOR 28 , —CONR 29 R 30 , —SO 2 R 31 or —SO 2 NR 32 R 33 , wherein each of R 27 , R 28 , R 29 , R 30 , R 31 , R 32 and R 33 independently is hydrogen, an alkyl group, a substituted alkyl group or an aryl group, or R 9 and R 10 are combined to form a five-membered or six-membered ring; —X˜Y— is —CR 34 R 35 —CR 36 R 37 — or —CR 38 ═CR 39 —, wherein each of R 34 , R 35 , R 36 , R 37 , R 38 and R 39 independently is hydrogen, an alkyi group or an aryl group, or R 39 and R 39 are combined to form a benzene or naphihalene ring; -Z- is —O—, —S—, —NR 40 —, —CR 41 R 42 — or —CH═CH—, wherein R 40 is an alkyl group, a substituted alkyl group or an aryl group, and each of R 41 and R 42 independently is hydrogen or an alkyl group; n is 0 or 1; in which each of R 11 and R 12 independently is hydrogen, an alkyl group or an aryl group, or R 11 and R12 are combined to form a five-membered or six-membered ring; the benzene rings h and i may have a substituent group; and the beazene rings h and i may be condensed with another aromatic ring or a heterocyclic ring.