Obtaining of a New Heat-Resistant Epoxy Composition Based on ED-20 Resin

Saccharin-6-carboxylic acid triglyceride-1,2,3-tricarboxymethylimide was synthesized to create new heat-resistant epoxy composites based on ED-20 epoxy resin. A reaction of saccharin-6-carboxylic acid triglyceride with monochloroacetic acid was conducted. Composition and structure of synthesized compound were confirmed by elemental analysis and infrared spectroscopy. Resulting product was used as a hardener-plasticizer for the industrial epoxy resin ED-20. To compare the thermal properties of resulting epoxy composite, a composite of ED-20 and PEPA was also prepared. The optimal amount of hardener was determined by thermogravimetry based on mass loss. It was found that resulting compound cures ED-20 epoxy resin under harsh temperature conditions (160–200°C), but when using the UP 606/2 curing accelerator, the curing temperature of composition decreases to 47–100°C. Resulting composition’s cure degree under optimal curing conditions reaches 87%. Differential thermal analysis (DTA) and thermogravimetric analysis (TGA) were used to determine thermal properties, as well as study some of the physical and mechanical properties of epoxy composites. It was demonstrated that the resulting epoxy composites possess high thermal and physicomechanical properties, enabling the synthesized compound to be used as a highly effective hardener-plasticizer for ED-20 epoxy resin.