抄録
The hydrophobic epoxy resin system for outdoor insulation was examined by various endurance tests, that is, high energy Xenon weathering test, ozone aging test, and acid rain test. After them, following properties were evaluated, e.g. surface micro-formation, surface roughness, contact angle, and tracking and erosion resistance. These surface properties of the hydrophobic and the conventional epoxy systems were not changed after the ozone aging test and the acid rain test. However after the Xenon weathering test, these properties were changed. The contact angle of conventional cycloaliphatic epoxy system was declined, but the contact angle of hydrophobic epoxy system was increased with progressing the test. From the IEC tracking test, is was confirmed that tracking and erosion resistance of the hydrophobic epoxy system was better than the conventional cycloaliphatic epoxy system. As the result of the degradation analysis, it was clarified that even though the base material is the same, hydrophobic epoxy system has much better weatherability.
