Propiophenone derivatives as photoinitiators for photopolymerisation

Abstract From the Canadian patent

1 -, 3-14117/+, Propiophenone derivatives as photoinitiators for photopolymerisation, Abstract:, Propiophenones of the formula I (I), in which R1 is hydrogen or C1-C4-alkyl -Si(CH3)3, allyl or benzyl, R2 is hydrogen C1-C8-alkyl, C1-C4-, alkyl which is substituted by C1-C4-alkoxy or -OH -(CH2-CH2-O)n-R5 where n is 2 to 20 and R5 is H or C1-C4-alkyl, -Si(CH3)3, benzyl, C3-C6-alkenyl C3-C4-alkynyl or 2-tetrahydrofuranyl, or R1 and R2 together are a C1-C6-alkylidene radical or a C2-C6alkylidene radical which is substituted by hydroxyl C1-C4-alkoxy or phenyl, a linear or branched C2-C6alkanediyl radical, a benzylidene, cyclopentylidene or cyclohexylidene radical or a 2,2,2-trichloroethylidene …