Preparation of alkyds
Four different alkyds having oil contents of 35% (w/w), 47% (w/w), 60% (w/w) and 78% (w/w) were prepared
using a two-stage alcoholysis-polyesterification method. [16,17]
The alkyds were labeled as follows: J-AKD 1 (36% oil); J-AKD 2 (47% oil); J-AKD 3 (59% oil); J-AKD 4 (78%
oil). In preparing each of the alkyd, a known weight of jojoba seed oil was heated to a temperature between 220°C
and 240°C. Glycerol (14.8 g), and 0.2 g calcium carbonate were added while maintaining the temperature at about
240°C. The completion of alcoholysis was monitored by taking samples of the reaction mixture every 5 min. Each sample
was mixed with anhydrous methanol in a 1:1 volume ratio until a clear solution was obtained which indicated the
end of alcoholysis process.