Patent ID: 11046104

Abstract:
A composition comprising a first infrared absorbing material which is a doped metal oxide comprising indium and/or tin; and a second infrared absorbing material which is a compound selected from: or a salt or polymer thereof, wherein —M is a metal selected from a group 3-10 (Group 1MB-VIII) element or a lanthanide; —R1 is selected from hydrogen, phosphonate, sulphonate, nitro, halo, cyano, thiocyano, thioalkyl, thioaryl, alkyl, alkoxy, aryl, aryloxy, amines, substituted amines and substituted aryl; —one of R2 and R3 is oxygen and the other of R2 and R3 is NO; —n is a number corresponding to half the co-ordination number of the metal M; —each L and L′ is independently a ligand complexed to the metal M; and —y is a number corresponding to the co-ordination number of the metal M.