Patent ID: 8034879

Claim:
A process for preparing pentablock copolymers functionalized with OH groups, wherein exactly two blocks containing hydroxy-functionalized (meth)acrylates and monomers selected from the group consisting of the non-hydroxy-functionalized (meth)acrylates or mixtures thereof and the three other blocks containing (meth)acrylates or mixtures thereof, which have no hydroxyl function and among which two blocks in turn are of corresponding composition and the third block has a different composition, are prepared as pentablock copolymers, wherein said pentablock copolymers comprise at least one A block which is composed of hydroxy-functionalized (meth)acrylates and monomers selected from the group consisting of the non-hydroxy-functionalized (meth)acrylates or mixtures thereof and said A blocks of the pentablock copolymer contain ≦8 hydroxyl groups.