| abstract |
The present invention relates to an NCO-reactively modified copolymer which comprises (a) at least one monomer containing sulfonate groups, (b) at least one monomer containing carboxyl groups and (c) at least one type of NCO-reactive group introduced after the copolymerization. The invention further provides a process for preparing the copolymer, a process for modifying a hydrophilic surface with the copolymer by reaction with a polyisocyanate and a product for medical use having a surface modified by the above process. |