| abstract |
The invention relates to a primer comprising a mixture dissolved or dispersed in one or more solvents A copolymer of vinylcaprolactam and / or vinylpyrrolidone obtained by copolymerization, preferably free-radical copolymerization, and one or more of the following monomers: a) an acrylic acid ester of a linear, primary alcohol having 2 to 10 carbon atoms in the alkyl radical of the alcohol, b) an acrylic acid ester of a branched, non-cyclic alcohol having 4 to 12 carbon atoms in the alkyl radical of the alcohol, c) acrylic acid, One or more organofunctional silanes, A metal complex dye or a metal oxide dye, wherein the metal oxide is of the spinel type. Such a primer allows good adhesion between pressure-sensitive adhesive tapes and hydrophilic surfaces, in particular glass, and at the same time ensures good coloring of the primer, so that an opaque primer layer can be obtained. |