A cationically stabilizable amino-functional polymer having a number-average
molecular
weight of 3000, exists in the presence of water as a solution or stable emulsion
only when the pH is 8. Upon drying the polymer contains ethenically unsaturated
moieties selected from the group consisting of acrylic, methacrylic, and enamine.
The polymer is useful to promote adhesion of curable inks and other coatings for
plastic film. The invention further relates to a plastic film comprising such polymer.
