Patent ID: 7018775

Claim:
An imageable composition comprising a binder that is a negatively-charged sulfated polymer and an infrared absorbing cyanine compound having the structure: in which: R is hydrogen, or R is one or more alkyl, substituted or unsubstituted aralkyl, alkoxy, carboxyl, nitro, cyano, trifluoromethyl, acyl, alkyl sulfonyl, aryl sulfonyl, or halogen groups, or R is the atoms necessary to form a substituted or unsubstituted benzo group; A is (CH 2 ) n ; where n is 1–5; Y is C(R′) 2 , where R′ is hydrogen or alkyl; Z is hydrogen, halogen, alkyl, substituted or unsubstituted aralkyl; substituted or unsubstituted aryloxy, substituted or unsubstituted thioaryloxy, or substituted or unsubstituted diphenylamino; m is zero or one; and X is a cation.