Situ polymerization of monoethylenically unsaturated monomers with oligomeric or polymeric secondary amines

A process for the preparation of (co)oligomers or (co)polymers is disclosed. The process entails first the preparation of a mixture that contains a monoethylenically unsaturated monomer conforming to HR<1>C=CR<2>R<3> (M) an oxidizing agent and at least one polymer or oligomer conforming to formula (I), and an optional free radical initiator and then heating the mixture at a temperature in the range of 0 DEG C. to 220 DEG C.