| abstract |
Radiation-sensitive element comprising (a) one or more types of monomers, each comprising at least one ethylenically unsaturated group accessible to a free-radical polymerization, (b) at least one sensitizes, (c) at least one coinitiator capable of forming free radicals together with the sensitizes, (b) and selected from 1,3,5-triazine derivatives with one to three CX3 groups, wherein X represents chlorine or bromine; peroxides; hexaarylbiimidazoles; oxime ethers; oxime esters; N-aryl glycines and derivatives thereof; thiol compounds; Naryl, S-aryl and O-aryl polycarboxylic acids with at least 2 carboxyl groups of which at least one is bonded to the N, S or O atom of the aryl unit; alkyltriarylborates; benzoin ethers; benzoin esters; trihalogenomethylarylsulfones; amines; N,N-dialkylaminobenzoic acid esters; aromatic sulfonyl halides; trihalogenomethylsulfones; imides; diazosulfonates; 9,10-dihydroanthracene derivatives; α-hydroxy and α-amino acetophenones and onium salts; and (d) optionally one or more components selected from alkali-soluble binders, colorants, exposure indicators, plasticizers, chain transfer agents, leuco dyes, surfactants, inorganic fillers and thermopolymerization inhibitors, characterized in that the at least one sensitizes is a compound of the formula (I): wherein X is a spacer group comprising at least one C-C double bond conjugated to the heterocycles, Y and Z independently represent an optionally substituted fused aromatic ring and V and W are independently selected from O, S and NR, wherein R is selected from an alkyl, aryl and aralkyl group which can optionally be mono- or polysubstituted. |