| abstract |
The invention relates to a primer containing a solvent-containing two-component polyurethane binder comprising I) a curing component (A), comprising an addition product of at least one organic polyisocyanate (B) with an average NCO functionality of 2.5 to 5.0 and an isocyanate content of 8 to 27 wt. % and an alkoxysilane (C) of formula (I) with at least one isocyanate-reactive group, n Q—Z—SiX a Y 3-a (I), n in which n Q represents an isocyanate-reactive group, n Z represents a linear or branched C 1 -C 12 alkylene group, n X represents a hydrolyzable group, n Y represents identical or different C 1 -C 4 alkyl groups and n a is an integer from 1 to 3, and n II) a lacquer resin (D) which can react with isocyanate groups as adhesion promoter. |