Abstract
Alkyd resins are short branched polyester chains, formed by polycondensation of a di-basic acid and a polyhydric alcohol, in the presence of glyceride oil or oil derived fatty acid. The conventional glyceride oils used for the production of alkyd resin are soya bean, and linseed oil. The most explored is the soya bean oil. Hence, this project explores the possibilities of substituting soya bean oil with beniseed oil for the production of alkyd resin. Alkyd resin was produced using beniseed oil as the source of glyceride oil. Beniseed oil extracted from sesame indicum seed was evaluated for its physicochemical properties. The extracted beniseed oil was converted into alkyd resin for use in surface coatings. The results of the analysis showed thatbeniseed oil has acid value 2.8mgKOH/g, free fatty acid (% Oleic) 1.40, Iodine value 120, density 0.925g/cm 3 , refractive index 1.4772. Analyses of the alkyd resin after dilution with kerosene showed the following results: Acid index 8.6mgKOH/g;%Nonvolatile matter 70.4;Color(Gardner)14-15; Viscosity 140 poises;Density0.9902g/cm 3 ,surface dry(70% solid) within 15 mins. The alkyd resin was found suitable in paint. Based on the results of the study, beniseed oil has shownpotential as a substitute for soya bean oil due to its high oil content and the high degree of unsaturation and consequent ability to polymerisation.
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