Synthesis and characterisation of chlorinated rubber seed oil alkyd resins

Formation and Characterization of Paint Based on Alkyd Resin Derivative of Ximenia americana (Wild Olive) Seed Oil

“…In the latter, it is revealed that there is an initial sharp decrease in acid value followed by a more gradual decrease. Similar observations had been reported (Onukwli & Igbokwe, 2008;Ikhuoria et al, 2007). The decrease in acid value is explained as arising from the desperate reactivities of primary and secondary hydroxyl groups of glycerol with carboxyl groups of phthalic anhydride.…”

“…The viscosity of the seed oil is 900 cp, this indicates that the oil is highly viscous at ambient temperature. The specific gravity is 0.912 g cm -3 , it is the lowest in comparison with linseed oil, crude castor seed oil and rubber seed oil having values of 0.93-0.98, 0.93 and 0.93 g cm -3 respectively (Onukwli & Igbokwe, 2008;Ikhuoria et al, 2007;Majumder, 1990). The refractive index of the seed oil is 1.435, it is lower comparing with the range of refractive indices of drying oils which are comparatively narrow from 1.46 to 1.54 and this suggests that it can be used as a test for purity and as an aid to identification (BS 6900).…”

“…This mixture was heated by heating mantle to 200 ºC and maintained at this temperature for 2 hours after which a small quantity of the aliquot was taken to check for solubility in methanol indicating formation of the monoglyceride. At the onset of the second phase, the temperature was lowered to about 180 ºC and measured quantity of phthalic anhydride was added, followed by addition of xylene (10% of total weight charged) into the reaction mixture to remove the water of esterification by forming an azeotrope (Onukwli & Igbokwe, 2008;Ikhuoria et al, 2007). The temperature was increased to 230-250 ºC while the reaction lasted.…”

“…Some physicochemical properties (colour, iodine value, saponification value and acid value) of the alkyd resins prepared were determined using standard method (AOCS, 1996). The alkyd samples were thinned to 50% with xylene and applied on thin glass panels at room temperature (Ikhuoria et al, 2007). The drying schedule of the sample in terms of time to set-to-touch and drying through was determined.…”

Extraction and physicochemical analysis of some selected seed oils

“…This shows that both moringa and groundnut oils will be useful as unrefined oils. (Ikhuoria et al 2007). This indicates that the oils could also be used in soap making since their saponification values falls within the range of these oils.…”