Adhesion of adhesives and lacquers to UV-coatings
Posted: Mon Jan 26, 2015 5:16 am
I would like to ask why to UV-coatings (radical and cationic curable), the adhesives and lacquers (water- and solvent-based) have poor adhesion?
I tried to raise the polarity of the UV-coatings by adding acrylic acid, but the adhesion of adhesives and lacquers to the UV-coatings does not improve.
Even to "pure" UV-coating, obtained only from Trimethylolpropane trimethacrylate + photoinitiator (without any other additives), the adhesion of adhesives and lacquers is again too poor.
Is there any explanation for this rather strange for me phenomenon?
Thank you in advance!
I tried to raise the polarity of the UV-coatings by adding acrylic acid, but the adhesion of adhesives and lacquers to the UV-coatings does not improve.
Even to "pure" UV-coating, obtained only from Trimethylolpropane trimethacrylate + photoinitiator (without any other additives), the adhesion of adhesives and lacquers is again too poor.
Is there any explanation for this rather strange for me phenomenon?
Thank you in advance!