| abstract |
Polyether block copolymers of the general structure B- (A-OH) n are described. Where n is equal to or greater than 2 and the blocks A are made of polyoxypropylene units and the central block B consists of polyoxytetramethylene, polyoxyethylene, polybutadiene, polyisoprene, polyamide, polyurethane or polyester units, the central block B being under DMC. Catalysis, catalysis by one or more phosphacene and / or porphyrin derivative (s) or alkali metal catalysis was propoxylated. These polyether block copolymers are suitable for the preparation of compositions which serve as the basis for preparations for use as one-component moisture-curing or two-component adhesives or sealants, for assembly bonding, for surface bonding and / or coating, as reactive hot melt adhesive or as laminating adhesive. |