Process for the photopolymerization of ethylenically unsaturated compounds

Claim 1

Process for the photopolymerisation of ethylenically unsaturated monomers which contain terminal H 2 C= groups and are water-soluble with the aid of at least one photoredox pair, which comprises employing as redox pair, on the one hand, a diazine compound of the formula ##SPC16## wherein R 11 and R 21 denote a phenyl radical, a benzoyl radical, a phenylsulphonic acid group a methyl group or a hydrogen atom, or R 11 and R 21 together with two carbon atoms of the ring I denote a five-membered or six-membered heterocyclic and R 31 , r 41 and R 51 denote a hydrogen atom, or lower alkyl group, a chlorine atom, a nitro group, a primary amino group, an acylamino group, a trimethylammonium group, a carboxylic acid amide group which is not substituted further or is substituted further by one to two lower alkyl groups, a carboxylic acid group, carboxylic acid methyl ester group or carboxylic acid ethyl ester group or sulphonic acid group, or two of R 31 , R 41 and R 51 together with two adjoining carbon atoms of the ring II denote an heterocyclic ring, and on the other hand, an electron donor, and using for the photopolymerisation a radiation which lies in the range of 200 to 450 nm.