Synthesis and evaluation of water-reducible acrylic-alkyd resins with high hydrolytic stability

Relatively poor hydrolytic stability is one of the major drawbacks of waterborne alkyd resins. Therefore, the shelf life of the paints containing these kinds of resins is usually short. In this research, the hydrolytic stability of water-reducible alkyd resins has been improved by employing polyacid acrylic copolymers in alkyd resins structure. In addition, the effect of other raw materials (such as neutralizing agent) and synthesis conditions on the resins properties was investigated. The results showed that the optimum synthesized water-reducible acrylic-alkyd resins had a high hydrolytic stability and their acid values increased only 23.5% after 4 months storage at ambient temperature. The synthesized resin was also used in an air-drying water-reducible lacquer formulation and its physical and mechanical properties were evaluated. (C) 2009 Published by Elsevier B.V.