Materials for use as adhesive and for surface sealing

A method for the bonding of two substrates with metal, plastic, concrete and/or ceramic surfaces, wherein one or more adhesives from the group consisting of

• a) one or more hybrid materials containing an organic polymer from the group of the polyamides, polyimides and epoxy resins and an inorganic oligo- or polymer from the group of the oligo- and polysiloxanes and heterocondensates of Si with Ti, Zr and/or Al, wherein the organic and the inorganic component are covalently bound to one another, in combination with one or more ethanolic or aqueous inorganic sols based on silyl alkoxylates, wherein hybrid material and inorganic sol are crosslinked, and
• b) one or more hybrid materials containing an organic polymer from the group of the polyamides and polyimides and an inorganic oligo- or polymer from the group of the oligo- and polysiloxanes and heterocondensates of Si with Ti, Zr and/or Al, wherein the organic and the inorganic component are covalently bound to one another,
• are applied onto at least one metal, concrete or ceramic surface of at least one substrate and the two substrates are thereafter joined together,
• wherein the silyl alkoxylate is a silane of the general formula (I)
• RnSiX4-n (I)
• wherein the groups X are the same or different from one another, hydrolysable groups or hydroxyl groups, the residues R, the same or different from one another, stand for hydrogen, alkyl, alkenyl and alkinyl groups with up to 4 carbon atoms and aryl, aralkyl and alkaryl groups with 6 to 10 carbon atoms and n means 0, 1 or 2, with the proviso that at least one silane with n=1 or 2 is used.

A composition containing

• ca) a hybrid material, containing an organic polymer from the group of the polyamides, polyimides and epoxy resins and, covalently bound thereto, an inorganic oligo- or polymer from the group of the oligo- or polysiloxanes or corresponding heterocondensates of Si with Ti, Zr and/or Al, and
• cb) an ethanolic or aqueous inorganic sol based on silyl alkoxylates,
• wherein hybrid material and sol are crosslinked,
• wherein the silyl alkoxylate is a silane of the general formula (I)
• RnSiX4-n (I)
• wherein the groups X are the same or different from one another, hydrolysable groups or hydroxyl groups, the residues R, the same or different from one another, stand for hydrogen, alkyl, alkenyl and alkinyl groups with up to 4 carbon atoms and aryl, aralkyl and alkaryl groups with 6 to 10 carbon atoms and n means 0, 1 or 2, with the proviso that at least one silane with n=1 or 2 is used.