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A new method of synthesis of elevated-molecular-weight (E-M) epoxy resins with desired epoxy-groups content, based on polyaddition of bisphenol A to a lower-molecular-weight (L-M) epoxy resin (epoxy value EV = 0.57 mol/100 g) under microwave irradiation in the presence of 2-methylimidazole, as a catalyst, was described. Syntheses were carried out in a multimode microwave reactor "Plazmatronika"...
Bis-l,3-oxothiolane-2-thione resins (Scheme 1) were prepared in the reactions of commercial low-M epoxy resins, Epidian 5 and Epidian 6, with carbon disulfide. Compositions including Epidian 5 or 6 and various amounts (5, 10, 20, 30 or 40 wt. %) of oxothiolane resins as additives were prepared and cured with piperidine. Mechanical properties such as bending, compressive, tensile and impact strengths...
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