HYDROGENATION METHOD FOR UNSATURATED BLOCK COPOLYMERS AND HYDROGENATED UNSATURATED BLOCK COPOLYMERS

摘要

Use is made, for selectively hydrogenating the olefinic double bonds of block copolymers, at least one block of which comprises olefinic double bonds, using a catalyst based on a metal from Group VIII in a medium comprising an organic solvent for the copolymer and an ionic liquid as solvent for the catalyst, of a water-immiscible ionic liquid, preferably an ionic liquid for which the anion is the hexafluorophosphate anion and the cation is the 1-butyl-3-methylimidazolium (bmim⁺) or 1-ethyl-3-methylimidazolium (emim⁺) cation.