Butadiene-acrylonitrile toughened epoxy adhesive
A technology of tough epoxy and nitrile, which is applied in the field of preparation of nitrile toughened epoxy adhesive, can solve the problem of poor compatibility of epoxy resin and nitrile rubber modification, and the blending and modification phase of epoxy resin and nitrile rubber. Poor compatibility and other problems, to achieve the effect of solving poor compatibility
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Embodiment 1
[0008] Accurately weigh 25 g of carboxyl-terminated liquid nitrile rubber with an acrylonitrile content of 25% and a functionality of 1.8, 100 g of solid epoxy resin E-20, 3 g of liquid epoxy resin E-51, and 7 g of 4-functional epoxy resin g and catalyst triethylamine 0.3g, put into the reaction kettle, heat up to 140°C, when the material in the kettle is completely in a liquid state, start stirring at a speed of 133rpm, fill with nitrogen protection after reacting for 1h, then react for 3h, and control the acid value Below 1.0, lower the temperature to 90°C, add 1.5g of silane coupling agent γ-aminopropyltriethoxysilane and 5g of curing agent dicyandiamide, stir for 40min and discharge to obtain solid glue.
Embodiment 2
[0010] Accurately weigh 20 g of carboxyl-terminated liquid nitrile rubber with an acrylonitrile content of 25% and a functionality of 1.8, 100 g of solid epoxy resin E-20, 3 g of liquid epoxy resin E-51, and 7 g of 4-functional epoxy resin g and catalyst triethylamine 0.3g, put into the reaction kettle, heat up to 140°C, when the material in the kettle is completely in a liquid state, start stirring at a speed of 133rpm, fill with nitrogen protection after reacting for 1h, then react for 3h, and control the acid value Below 1.0, lower the temperature to 80°C, add 1.5g of silane coupling agent γ-aminopropyltriethoxysilane and 5g of curing agent dicyandiamide, stir for 30min, and discharge to obtain a solid glue.
Embodiment 3
[0012] Accurately weigh 30 g of carboxyl-terminated liquid nitrile rubber with an acrylonitrile content of 25% and a functionality of 1.8, 100 g of solid epoxy resin E-20, 3 g of liquid epoxy resin E-51, and 7 g of 4-functional epoxy resin g and catalyst triethylamine 0.3g, put into the reaction kettle, heat up to 150°C, when the material in the kettle is completely in a liquid state, start stirring at a speed of 133rpm, fill with nitrogen protection after reacting for 1h, then react for 3h, and control the acid value Below 1.0, lower the temperature to 90°C, add 1.5g of silane coupling agent γ-aminopropyltriethoxysilane and 5g of curing agent dicyandiamide, stir for 50min and discharge to obtain solid glue.
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