Patent ID: 8791289

Claim:
A method for the preparation of (meth)acrylated photoinitiators comprising the steps of: A) preparing an intermediate according to Formula (I) by reacting a starting material according to Formula (II) with an acid chloride according to Formula (III) in an aprotic solvent using an inorganic base or a salt of a carboxylic acid: wherein: R1 is selected from the group consisting of hydrogen and a methyl group; A represents a group including at least one photoinitiating moiety selected from the group consisting of benzil ketals, α,α-dialkoxyacetophenones, α-hydroxyalkylphenones, α-aminoalkylphenones, acylphosphine oxides, bis-acylphosphine oxides, acylphosphine sulfides, α-haloketones, α-halosulfones, phenylglyoxalates, benzophenones, thioxanthones, and 1,2-diketones; L represents a n+o-valent linking group including at least one carbon atom; n and o each independently represent an integer from 1 to 4; p is equal to 0 or 1; X represents a group selected from the group consisting of Cl, Br, I, and R 2 SO 3 ; and R 2 represents an optionally substituted group selected from the group consisting of an alkyl group, an alkenyl group, an alkynyl group, an alkaryl group , an aralkyl group, an aryl group, and a heteroaryl grou; and B) forming a (meth)acrylated photoinitiator by β-elimination of HX from the intermediate according to Formula (I).