Drapex 6.8 Epoxidized soybean oil Crompton-Witco Oils (Process / Natural) >> Soya oil DRAPEX ® 6.8 EPOXY PLASTICIZER DESCRIPTION Drapex 6.8 epoxy plasticizer is an epoxidized soybean oil specifically designed to provide optimum heat and light stabilizing performance together with maximum compatibility in vinyl compounds. Heat Stability. Drapex 6.8 epoxy stabilizer acts synergistically with mixed metal stabilizers, particularly those of the barium-zinc type, to provide significantly better heat stability than that obtained with either component alone. The extension of heat stability obtainable through the use of Drapex 6.8 facilitates the processing of “rework” in calendering and allows longer extrusion and injection molding cycles before shutdown for cleanup is necessary. Drapex 6.8 is beneficial for all vinyl formulations, but is especially necessary for the proper stabilization of compounds containing phosphate or chlorinated paraffin plasticizers. Light Stability. In clear, plasticized vinyl compounds, out-door weathering tests conducted in Arizona have shown that the use of Drapex 6.8 can triple or even quadruple the out-door life of these compositions. Best performance is obtained through the use of Drapex 6.8 in conjunction with a liquid barium- zinc, such as Mark 4716 heat stabilizer. This combination provides better light stability than any other type of stabilizer system recommended for crystal clarity, as for example, the organotins. Opaque plasticized compounds stabilized with barium-zinc -epoxy combination and opacified with TiO2, display a resistance to UV degradation better than or equal to that obtained from any lead stabilizer. In rigid compositions, the functionality of Drapex epoxy plasticizers are also quite evident. It is not sufficient just to incorporate UV absorbers (e.g. Mark 1413) to derive optimum light stability. The compound should also include an epoxy, preferably the monoester Drapex 4.4 epoxy plasticizer, for maximum weathering performance. Epoxidized soybean oil plasticizer. Provides optimum heat and light stabilizing performance and very good compatibility in vinyl compounds. Can be used in combination with mixed metal stabilizers such as barium-zinc type to provide significantly better heat and light stability.