Epoxidised sunflower oil

Epoxidised soybean oil or epoxidised sunflower oil are commercial products obtained by the epoxidation of vegetable oils with peroxyacetic or peroxiformic acid (generated... 

Boussoum, M. O. Atek, D. Belhaneche-Bensemra, N. Interactions between poly(viny 1 chloride) stabilised with epoxidised sunflower oil and food simulants. Polymer Degradation and Stability, 2006,91, 579-584. 

Vegetable oil-based polyols obtained by epoxidation are treated with diisocyanates in the presence of a suitable chain extender and catalyst to obtain polyurethanes (Fig. 6.5). Polyurethanes have been prepared from olive, peanut, canola, corn, soybean, safflower and sunflower oil by the conventional epoxidation process, followed by treatment of the polyols of the epoxies with diphenylmethane diisocyanate. Polyurethane resins may also be obtained by the treatment of soybean polyols (which are obtained by methanolysis of epoxidised soybean oil with isocyanates at a temperature of 50°C) or from epoxidised linseed oil with TDI using xylene as the solvent. 

The preparation of epoxy resins from a large number of vegetable oils such as sunflower, cotton-seed, linseed, vernonia, soybean, castor and Mesua ferrea has been reported. " However, most of these epoxy resins exhibit poor mechanical properties which limit their applications. Vegetable oil-based epoxy resins rather than epoxidised vegetable oils are also used as reactive diluents. These are low viscosity materials used in conjunction with industrial epoxy resins to reduce viscosity and to increase the molecular mass of the latter. As a reactive diluent can also act as a solvent for the resin system, it enables the production of high-solid and low VOC (volatile organic compound) coatings. 

A novel triglyceride-based a, p-unsaturated ketone, obtained by photoperoxidation from high oleic sunflower oil, can be cross-linked with diamino diphenyl methane through the aza-Michael addition reaction. The reaction of p-toluidine with either enone-containing methyl oleate or epoxidised methyl oleate, produces an alternative to amine-cured epoxidised vegetable oil thermosets. ... 

High molecular weight liquid epoxy resins from modified vegetable oils such as epoxidised soybean, rapeseed, linseed and sunflower oils, as well as from hydroxylated soybean and rapeseed oils have also been prepared. Reactions of (i) epoxidised oils, with bisphenol-A and (ii) bisphenol-A-based epoxy resin with hydroxylated natural oils in the presence of different catalysts such as LiCl, 2-methylimidazole, triphenylphosphine and triethanolamine at 130-160 C (depending on the catalyst type) under nitrogen, produce the required epoxy resins as shown in Rg. 7.7. ... 

Epoxidised canola oil and sunflower oil with a high oleic acid content (74% and 86%, respectively), canola oil with standard oleic acid content (64%) and soybean oil with low oleic acid content (22%), are blended with a commercial epoxy resin and used as the matrix in the preparation of composites which use E-glass as the structural fibre. The resultant products showed that the level of unsaturation and the amount of bio-based epoxy resin in the matrix directly affect the mechanical properties of anhydride-cured composites. 

Zhang and co-workers developed unique crosslinkable unsaturated polyesters by a one-pot lipase-catalysed oxidation followed by copolymerisation of crude linoleic acid, glycerol and l,18-ds-9-octanedecenedioic acid [81]. In a similar approach, Roumanet and co-workers prepared aliphatic unsaturated polyesters derived from l,18-(Z)-octadec-9-enedioic acid (a derivative of fatty acids from sunflower oil) and aliphatic diols of different molecular weight [82]. The double bonds of the ensuing polyester backbones were then epoxidised and photocrosslinked, yielding transparent and homogeneous crosslinked films with high hydrophobicity. 

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