Patent ID: 6929955

Claim:
An interactive system comprising: (a) a surface of a plastic material selected from the group consisting of a poly(meth)acrylate polymer, a polyvinyl ester polymer, copolymers thereof, and a mixture of at least one polyalkyl(meth)acrylate with one or more of the group consisting of polystyrene, polyacrylonitrile, polycarbonate, and polysulfone; the material containing at least one structural element (A) which is the ester group of the acrylate or vinylester polymer, and (b) a linker coupled to a pharmaceutically or physiologically active substance, the linker selected from the group consisting of a (poly)alkylene glycol, a (poly)alkylene imine, a (poly)alkylene amine, a polyoxazilin and a (poly)alkylene sulfide, wherein the linker is attached to the structural element (A) on the surface of the plastic material by a hydrogen bond which cannot be reversed by pH values in the range of 2 to 13 or temperatures up to 60° C.