Polymerised Salicornia Oil Based Alkyd Resins and its Comparision with Polymerised Karanja Oil Based Resins

Salicornia and Karanja oils are widely available in India. With the aim to develop value added products from local resources, Salicornia and Karanja oils were polymerized thermally and thermocatalytically using various percentage of benzoyl peroxide (BPO) as a free radical catalyst. During polymerization the free fatty acid content increases as revealed by increasing acid value and unsaturation decreases as indicated by decreasing iodine value. Alkyd resins were prepared from thermally polymerized, thermocatalyticlly polymerized and unpolymerized oils. The mechanical and chemical properties of air-dried and baked films of alkyd resins were studied and compared. The study indicates that the film properties of the alkyds prepared from the catalytically polymerized oils are better than those of the alkyds from the thermally polymerized and unpolymerised oils.It was also observed that the Salicornia oil based alkyds have better properties than Karanja oil based alkyds . Karanja oil based alkyds were not suitable for coating due to its nondrying nature.