Abstract
Two potential applications of two-phase interpenetrating epoxy thermosets based on diglycidyl ether of bisphenol A (DGEBA) epoxy resin, commercial diamine, and epoxidized vegetable oils are described. The applications are toughening commercial epoxy thermosets and preparation of crack-resistant coatings. Thermosets with DGEBA matrix and small "vegetable" rubbery particles have excellent toughness and other physicomechanical properties. Two-phase epoxies, especially those with continuous "vegetable" rubbery phase and small rigid DGEBA particles, form stress- and crack-resistant coatings. This in situ approach for preparation of two-phase coatings is an attractive alternative to the hard core-soft shell and soft core—hard shell reactive latex technology. Epoxidized soybean oil, which is commercially available at a low price, is especially suitable for these applications.
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