POLYACRYLATE-BASED GRAFT COPOLYMER

The invention relates to a polyacrylate-based graft copolymer comprising a polyacrylate backbone and polyolefin side chains grafted thereon, wherein the graft copolymer is prepared by reacting a first polymer and a second polymer, wherein the first polymer comprises recurring units having the structure (I) and optionally further recurring units having the structures (II): Formulae (I), (II) wherein R1, R3 is H or CH3 and R2 is a hydrocarbon moiety comprising 1 to 6 carbon atoms, one of R4 and R5 is H and the other one of R5 and R4 is COOR2, C═N, Cl, or an aliphatic or aromatic hydrocarbon moiety optionally containing one or multiple hetero atom functionalities, wherein R2 in (I) is different from R2 in (II) and the second polymer is a functionalized polyolefin having one or multiple hydroxyl functional groups, wherein the graft copolymer is formed by transesterification of the COOR2 group of (1) or (II) with the hydroxyl functional group of the functionalized polyolefin.