Primer for adhesive tapes

Primer comprising a mixture, in dispersion in one or more dispersants or in solution in one or more solvents, comprising:

• at least one copolymer obtained by copolymerizing a monomer mixture comprising:
• at least 20 wt % vinylcaprolactam, vinylpyrrolidone, or vinylcaprolactam and vinylpyrrolidone;
• one or more acrylic esters of a linear primary alcohol, one or more acrylic esters of a branched acyclic alcohol, or one or more acrylic esters of a linear primary alcohol and one or more acrylic esters of a branched acyclic alcohol;
• at least one chlorinated polyolefin;
• and
• at least one metal compound selected from the group consisting of a metal acetylacetonate, a metal alkoxide, and an alkoxy metal acetylacetonate,
• wherein:
• the total amount of, when present, the vinylcaprolactam, the vinylpyrrolidone, the acrylic esters of a linear primary alcohol, and the one or more acrylic esters of a branched acyclic alcohol in the monomer mixture is at least 90 wt % based on the total weight of the monomer mixture;
• the linear primary alcohol comprises 2 to 10 carbon atoms in a first alkyl radical;
• the branched acyclic alcohol comprises 3 to 12 carbon atoms in a second alkyl radical;
• and
• the monomer mixture comprises at most 1 wt % acrylic acid based on the total weight of the monomer mixture.