Hydrolyzates and / or condensates of epoxy and silane groups containing oligomers and polymers, processes for their preparation and their use

Hydrolyzates and / or condensates of epoxy and silane groups containing oligomers and polymers which can be prepared by hydrolyzing at least one at least one epoxy group (a1) and at least one hydrolyzable silane group (a2) containing oligomer and / or polymer (A) and / or condensed; and (meth) acrylate copolymers (A) containing lateral and / or terminal epoxide groups (a1) and lateral and / or terminal hydrolyzable silane groups (a2) of the general formula II: -SiR in which the indices and variables have the meaning indicated above, in a molar ratio of (a1): (a2) = 1.5: 1 to 1: 1.5, preferably 1.3: 1 to 1: 1.3 and especially 1 , 1: 1 to 1: 1.1; Processes for their preparation and their use.