A Comparison of the Syntheses of High Molar MassEpoxy Resins on the Basis of two Groups of ModifiedVegetable Oils

摘要

Application of epoxidized and hydroxylated natural oils as a new group ofenvironmentally friendly and renewable raw materials for the synthesis of high molarmass epoxy resins is described. Selected vegetable oils were first oxidized and nextreacted with mono and diethylene glycols. Obtained epoxidized soybean, rapeseed,linseed and sunflower oils were used together with Bisphenol A in the fusion process.Analogously, hydroxylated soybean and rapeseed oils were reacted with commercialgrade Bisphenol A-based low molar mass epoxy resin. The fusion process was carriedout in the presence of selected catalysts (i.e., lithium chloride, 2-methylimidazole,triphenylphosphine and triethanolamine) giving high molar mass epoxies. Therelationship between type of modified oil used in the synthesis and reactionconditions and properties of synthesized resins (e.g., value and distribution ofaverage molar mass, contents of epoxy groups and colour) is discussed.