Patent ID: 7816520

Claim:
5,6-diphenyl-1,2,4-triazinic compound of general formula (I): wherein: R 1 , R 2 , R 3 and R 4 , identical or different, represent a hydrogen, fluorine, chlorine or bromine atom, a C 1 to C 12 linear or branched alkyl group, a hydroxy group, a C 1 to C 18 linear or branched alkoxy group, a poly(ethoxy)-alkoxy group with a C 1 to C 4 alkyl fragment and an ethoxy number ranging from 1 to 4, an amino group, or a mono- or di-alkylamino group with a C 1 to C 4 alkyl fragment, X represents an ortho-, meta- or para-phenylene group, a 4,4′-biphenylene group, a 2,4- or 2,6- or 3,4- or 3,5-pyridinylene group, a 2,2′-bipyridinylene group, a meta- or para-phenylenediamino group, an ethylenediamino group, a 2,2′-piperazinylene group, a diacyl group of formula —(R 4 CO) 2 — wherein R 4 represents a phenyl radical, an alkylated chain of 3 to 10 carbon atoms, a phenanthrenylene group or an anthracenylene group, with the exception of 1,4-bis(5,6-diphenyl-1,2,4-triazin-3-yl)benzene, 2,4-bis(5,6-diphenyl-1,2,4-triazin-3-yl)pyridine, and 2,6-bis(5,6-diphenyl-1,2,4-triazin-3-yl)pyridine.