| abstract |
This disclosure relates to catalysts for the auto-oxidative drying of polymers, in particular for polymers used in paints or inks, based on unsaturated fatty acids, mostly from vegetal origin A compound is divulged for use as a polymerisation agent in coatings, characterized in that it comprises a cobalt-bearing alkyd polymer, said polymer having a cobalt content of 0.5 to 6% by weight, a mean molecular weight of more than 3000, and comprising cobalt carboxylate sequences Several processes are presented to illustrate the synthesis of the cobalt-bearing polymer These polymers retain the catalytic effect of cobalt towards the drying of polymers, while they greatly suppress the toxicity of cobalt by being essentially insoluble in water. |