Fast drying cobalt-free high solids alkyd paints

The drying of trade sales alkyd paints at adverse conditions has always been critical. Several routes are available for improving the physical drying properties of alkyd paints at low temperatures. Unfortunately, these approaches will always result in an increase in the VOC of these paints, which is not desired for high solids alkyd paints. Therefore, a new curing mechanism has been developed within Akzo Nobel Decorative Coatings for the improvement of the drying of high solids alkyd paints at adverse conditions. This paper presents the development of a one pot fast drying alkyd system based on thiol-ene chemistry. This novel technology is based on a mixture of a polyfunctional thiol resin and an alkyd resin. By using visible light photoinitiators and/or cobalt-free metal catalysts fast drying high solids alkyd paints were obtained.