Novel 'green' sucrose polyester alkyds for high-performing: Low-voc coatings

摘要

Sucrose polyesters synthesized from a variety of vegetable oils and their effects in a high solids alkyd paint system was studied experimentally. The sucrose estrification reactions were carried out with fatty acid methyl esters (FAME) of oils such as safflower, soybean, dehydrated castor (DCO), linseed, and tung. The sucrose polyesters were used as a paint ingredient to make a series of 250 g/L long oil alkyd white paints. The results show that the viscosity for the sucrose polyesters (SPE) show similar low viscosity range of 300-600 cP for all SPEs except for tung oil. The best scrub resistance result is observed for the SPE-alkyd paint which contains the highest level of conjugated linoleic acid. The tung and DCO SPE-alkyds are the only two experimental samples that demonstrate better gloss retention than the control alkyd formulation.