abstract |
Aqueous coating composition, for example for use as a clear or pigmented top coat or a primer, comprising:a) a polyol or a mixture of polyols having at least two hydroxy groups per molecule and:i a content C of carboxylate- and/or carboxylic acid-functional groups andii a content S of sulfonate- and/or sulfonic acid-functional groups, andb) one or more cross-linkers capable of reacting with hydroxy groups.A Polyol having a content C of carboxylate- and/or carboxylic acid-functional groups and a content S of sulfonate- and/or sulfonic acid-functional groups, the total content C+S being between 0.09 and 0.6 mmol/gram polyol, and the ratio C/S having a value between 0.5 to 20 and a process for preparing the polyol resin. |