A description is given of a process for preparing solutions of radiation-sensitive, free-radically polymerizable organic compounds, where a first starting compound, which has an acid halide group, and a second starting compound, which has an alcoholic hydroxyl group, are esterified with one another in a solvent or in a solvent mixture. Compounds of particular interest are defined by Formula, wherein R1, R2, R3 and R4 are as described in the specification. There is a device that holds, leads, releases and spreads the mesh in its proper location, related to the Hernia defect, and comprising an element holds the double-rolled mesh, and allows its releasing; another element allows the spreading of the double-rolled mesh; additional element allows the leading and locating of the double-rolled mesh. The baffles likewise present opposed washing and refining surfaces.