Additives for hydrogenated resins

Additives for hydrogenated resins, formed by functionalized perfluoropolyethers and functionalized polyolefins, said additives obtainable by using the following components:

• a) bifunctional perfluoropolyethers having a —COOR end group optionally in admixture with monofunctional perfluoropolyethers having —COOR end group, wherein R═H, C1-C10 alkyl, the number average molecular weight of bifunctional and monofunctional perfluoropolyethers being in the range 500-5,000, preferably 900-3,000;
• b) mono, bi or polyfunctional hydrogenated monomers having functional groups capable to react with the —COOR end groups of the compound a);
• preferably said functional groups of the hydrogenated monomers are aminic groups,
• c) polyolefins having functional groups, preferably formed by C2-C4 monomers, wherein said functional groups are capable to react with the block oligomer/polymer obtained by reaction of a) with b), preferably said functional groups being obtained by grafting with maleic anhydride;
• reacting in a first step a) with b), or a) with mixtures of monomers b) having a different functionality, until disappearance of the —COOR group of component a), and in a second step the product obtained from the reaction of a) with b) with the functionalized polyolefins c).