| abstract |
A method for producing oxygen-curable printing inks in mineral oil solutions, wherein from 2 to 60% by weight, based on the total ink weight, of an isocyanate-free oxidatively crosslinking urethane resin is used as a binder and can be produced by reacting 100 parts by weight of the ester formed from an aliphatic alcohol containing from 3 to 8 carbon atoms having at least three hydroxy groups and an unsaturated fatty acid having from 8 to 40 carbon atoms or a glycerol ester thereof and optionally an aliphatic or aromatic polycarboxylic acid having from 4 to 20 carbon atoms or an anhydride thereof, 60% by weight, based on the fatty acid mentioned above, with 3 to 120 parts by weight of a polyhydroxycarboxylic acid having 5 to 15 carbon atoms with at least two hydroxy groups and 10 to 100 parts by weight of an aliphatic or cycloaliphatic polyisocyanate or mixtures thereof, at a temperature of 50 to 150 [deg.] C. in the presence of non-polar minerals |