Crosslinkable polyurea polymers

The present invention relates to novel crosslinkable polyureas, to a process for the preparation thereof and to the use thereof in the manufacture of mouldings, especially ophthalmic mouldings, for example contact lenses. The invention relates to novel crosslinkable prepolymers of formula (1), wherein the variables have the meanings given in the claims, to homo- or co-polymers obtainable therefrom by crosslinking and to mouldings, such as, especially, contact lenses, made from those homo- or co-polymers.