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Application formula of epoxy resin synthesis II
Second, casting
In electrical and electronic equipment, various electrical components and large insulation equipment are cast to seal and prevent moisture. When casting with epoxy resin, it is necessary to use release agent, such as methyl silicone rubber, silicone oil and PVC film, to eliminate air bubbles during the casting process, 1 heat to drive out bubbles; 2 light pouring pouring material; 3 the best method is casting The resin was depressurized after decompression.
Formula one:
6101# Epoxy Resin 100 Polysebacic Acid 20 Nadic Anhydride 50
Quartz powder (>270 mesh) 200 benzyldimethylamine 0.25
100°C/1h+120°C/1h +150°C/2h+180°C/4h+200°C/6h δBending resistance=113.8MPa, δ compression=194MPa tgδ=8.5×10-3, ε=3.9Ω Volume=9.4×1015Ω.cm
Formula two:
634# epoxy resin 100 aluminum powder (100-200 mesh) 170 pyromellitic dianhydride 21 maleic anhydride 19
130°C/4h+160°C/12h+180°C/12h δ Impact 0.53MPa δ Compression Resistance=300MPa