| abstract |
The invention relates to a primer for improving the adhesion of adhesive tapes on hydrophilic surfaces, in particular glass or ceramic. The primer according to the invention comprises a mixture G dissolved or dispersed in one or more solvents at least one copolymer obtained by copolymerization of a monomer mixture comprising at least 90% by weight of the following monomers: Vinylcaprolactam and / or vinylpyrrolidone and one or more of the monomers a) and b): c) acrylic acid esters of a linear, primary alcohol having 2 to 10 carbon atoms in the alkyl radical of the alcohol, d) acrylic acid esters of a branched, non-cyclic alcohol having 3 to 12 carbon atoms in the alkyl radical of the alcohol, at least one organofunctional silane of the general structure (Ia) or (Ib) (R 1 O-) x Si (CH 2 OR 2 ) y (R 3 ) z (Ia) (R 1 O-) x Si (CH 2 NHR 2 ) y (R 3 ) z (Ib), wherein the radicals R 1 independently of one another are a C 1 -C 4 -alkyl radical, a C 2 -C 6 -alkoxyalkyl radical or an acetyl radical; the radicals R 2 are independently an organic radical; the radicals R 3 independently of one another represent a C 1 -C 18 -alkyl radical and x = 1, 2 or 3; y = 1, 2 or 3; x + y ≤ 4 and z = 4-x-y; at least one metal compound selected from the group consisting of metal acetylacetonates, metal alkoxides and alkoxy-metal acetylacetonates, - At least one amine. |