Infrared absorbing composition

Claim 1

An infrared absorbing composition containing a binder and at least one compound selected from compounds represented by formula (I) ##STR8## wherein R 1 , R 2 , R 3 , R 4 and R 5 , which may be the same or different, each represents a halogen atom, a hydrogen atom, or a substituted or unsubstituted alkyl, aryl, cycloalkyl or heterocyclic group, L is a divalent linking group and n is 0 or 1, or any pair of R 1 , R 2 , R 3 , R 4 and R 5 adjacent to one another on the same ring combine to form a ring; R 6 and R 7 , which may be the same or different, each represents an alkyl group or a substituted or unsubstituted aryl group; and R 8 and R 9 , which may be the same or different, each represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group; or R 8 and R 9 combine for form a substituted or unsubstituted ring, which may be condensed with one or more additional rings or ring systems which may be substituted with substituents; compounds represented by the formula (II) ##STR9## wherein R 10 , R 11 , R 12 , R 13 and R 14 , which may be the same or different, each represents a halogen atom, a hydrogen atom, or a substituted or unsubstituted alkyl, aryl, cycloalkyl or heterocyclic group, L' is a divalent linking group and m is 0 or 1, or any pair of R 10 , R 11 , R 12 and R 14 having adjacent positions on the same ring combine to form a ring; and R 15 and R 16 , which may be the same or different, each represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a cyano group; or R 15 and R 16 combine for form a substituted or unsubstituted ring, which may be condensed with one or more additional rings or ring systems which may be substituted with substituents: and compounds represented by the formula (III) ##STR10## wherein R 17 , R 18 , R 19 , R 20 and R 21 , which may be the same or different, each represents a halogen atom, a hydrogen atom, or a substituted or unsubstituted alkyl, aryl, cycloalkyl or heterocyclic group, L" is a divalent linking group and p is 0 or 1, or any pair of R 17 , R 18 , R 19 , R 20 , and R 21 having adjacent positions on the same ring combine to form a ring; and R 22 and R 23 , which may be the same or different, each represents a hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group or a cyano group; or R 22 and R 23 combine to form a substituted or unsubstituted ring, which may be condensed with one or more additional rings or ring systems which may be substituted with substituents.