Abstract: Process for the preparation of a polymer comprising the polymerisation of corresponding monomers in the presence of a triazine compound of the formula where R1=-A-B where A=—O— or —NR4—, B=amino group-containing substituent and R4=hydrogen or alkyl group R2= where E=—O— or —NR5—, n=3 to 15, m=0 to 10 and R5 hydrogen or alkyl group R3=R1, R2, —OR6 or —NR7R8 where R6, R7 and R8=hydrogen, alkyl or aryl group, which in each case may be substituted or non-substituted.

Abstract: Process for the preparation of a functionalized polymer containing an additive, in which process there is formed a compound that contains, besides at least one blocked isocyanate group, a free amino, hydroxy or carboxy group; this compound is linked to an additive via the free amino, hydroxy or carboxy group in the additive; this additive linked to the compound mentioned is contacted with a polymer that contains at least one free amino or hydroxyl group, at a temperature above the polymer's melting point and at least above (150)° C., such that the blocked isocyanate group reacts with the free amino or hydroxy group of the polymer to form the functionalized polymer. The invention also relates to the intermediate products formed in the process and in the preparation thereof. Lasdy, the invention relates to functionalized polymers and polymer compositions containing the functionalized polymer.