Results of kinetic studies of two-component photoinitiator systems used in the visible-light photoid uced polymerization of 2-ethyl-2-(hydroxymethyl)-1,3-propanediol triacrylate are presented. Nine different styrylquinolinum dyes coupled with n-butyltriphenylborate as a coinitiator have been used as photoinitiating systems. Reactive radicals that initiate the polymerization are formed by the well-known mechanism of photoinduced electron transfer between dye cations acting as electron acceptors and borate anions acting as electron donors. (C) 2010 Wiley Periodicals, Inc. J Appl Polym Sci 118: 165-172, 2010