Abstract:
Considerable amount of conjugated trienoic (eleosteric acid) or methylene interrupted
trienoic (lenolenic acid) acids in fatty oil contribute to form a dried film when thin film of
such fatty oil is exposed to air. Generally air drying brushing paint contains long oil alkyds
(more than 60% of oil to the solvent free resin) from drying oil (iodine value above
150mgg-l
) and semi drying oil (iodine value between 150mgg-1 and 120mgg-I)I. Long oil
alkyd resin from drying oil tends to dry more rapidly than that from semi drying oil. Oil
containing fatty acids with conjugated double bonds dry much faster than those with nonconjugated
double bonds.
