Soya bean oil, epoxidized

Azomethine metal complex pigments replace the metal with tin stabilizers, resulting in a change in shade. In the case of manganese-laked pigments trouble can also be expected in the presence of epoxy compounds. Pigment preparations based on epoxidized soya bean oil are normally used instead of diisodecyl phthalate pastes in the automotive sector e.g. for coloring PVC roofs etc. 

The in situ generation of performic and peracetic acids has an important application in producing epoxidized soya bean oil (ESBO), a plasticizer and stabilizer. The acetic acid is often re-cycled. Technology for the manufacture of propylene oxide98 and of epichlorohydrin" using internal cycle systems for peracetic or perpropionic acids has also been developed. 

Owing to metal chlorides titration by the coulometric method, and carboxylic acid titration by the potentiometric method, it is possible to follow the metal soaps consumption during thermomechanical heat treatments. This new technique provides a better understanding of the stabilization mechanisms of PVC with the calciumr-zinc system, and offers a better explanation of synergistic effects between metal soaps and secondary stabilizers such as epoxidized soya-bean oil, a-phenylindole, and butanediol-p-aminocroto-nate. The influence of these last stabilizers on zinc chloride formation enables us to classify them into short- and longterm stabilizers. 

To study the influence of secondary stabilizers on zinc chloride formation, we have prepared PVC sheets on a rolling mill with the different binary mixtures zinc stearate and a-phenylindole, epoxidized soya-bean oil, or /3-aminocrotonate esters, and we have followed the zinc chloride formation by coulometric titration of chloride ions. In Figure 5 we have combined the percentage of zinc chloride that may be liberated with respect to the initial amount of zinc stearate in the presence of a-phenyl-indole (Curve 1 )> epoxidized soya-bean oil (Curves 2 and 3), and butane-diol- -aminocrotonate (Curve 4) during heating in a stove at 180°C. 

Figure 5. Zinc chloride formation in the sheets of rigid PVC heated in a stove at 180°C under nitrogen atmosphere ana in the presence of a secondary stabilizer. (1) a-pnenylindole, 2.13 phr (2) epoxidizea soya bean oil, 5.53 phr (3) epoxidized soya bean oil, 16 phr (4) bu-tanediol-P-aminocrotonate, 2.7 phr.

Figure 6. Interaction between zinc chloride or calcium chloride and epoxidized soya-bean oil at 180°C...

Aliphatic esters are diesters of adipic, sebacic or azelaic acids and offer greater resistance to low temperatures than phthalates, but at a higher cost Epoxy ester plasticizers have limited compatibility with PVC so are used at low concentrations. The most widely used epoxy ester plasticizer is epoxidized soya bean oil (ESBO). ESBO resists extraction, does not migrate readily and acts also as a heat stabilizer. Other plasticizers in this group include epoxidized linseed oil and tall oil. 

ESO epoxidized soya bean oil FAA U.S. Federal Aviation Administration... 

Vernonia oil has been discussed as natural alternative to epoxidized soya bean oil or epoxidized linseed oil for applications such as reactive diluent for low VOC alkyd paints. 

H NMR was used to study migration of two plasticizers (di-(2-ethylhejgrl) phtha-late, DEHP, and tri-(2-ethylhexyl) trimellitate, TEHTM) each used in combination with epoxidized soya bean oil, ESBO, from PVC sheets (0.4 mm thick) into food simulants (sunflower oil, isooctane, ethanol)." The overall migration after reaching thermodynamic equihbrium is given by the equation " ... 

SM specific migration of individual components (here, plasticizer and epoxidized soya bean oil). 

Two plasticizers (di-(2-ethylhexyl) phthalate and epoxidized soya bean oil) were used in the range of concentrations from 0 to 50 phr. Tensile strength of both plastifieates was very similar and almost linearly decreased with the increase in plasticizer concentration. 

Common epoxy costabilizers are based on epoxidized soya bean oil and tall oil fatty acids or oleic acid. 

Chem. Descrip. Epoxidized soya bean oil CAS 8013-07-8 EINECS/ELINCS 232-391-0... 

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