| abstract |
The primer of the invention consists of at least 20 wt. % OH functional polyurethane prepolymers obtained by the reaction of polyester polyols (I), compounds reactive at least twice in relation to isocyanates with groups capable of forming salts (II), tetramethyl xylylene diisocyanate (III), amino alcohols (IV) and possibly a chain extender. The primer is particularly suitable for laminating plastics, especially PVC, with PVC, PES, polyolefine and polymethacrylate foils. As adhesive, a reactive hot-melt polyurethane adhesive is appropriately used. High initial and terminal strength are obtained. |