PF/EP/Nano-SiO2 composite paint for resistor     

王秀宇  张之圣  白天  孙谷清  王金龙  黄翔东 《天津大学学报(英文版)》2009,15(4):283-287

Phenolic resin(PF) and nano-SiO₂ were used to improve the curing property and high humidity resistance of epoxy resin (EP) and methyl nadic anhydride (MNA) resistor paint, respectively. Hydrogen bonds, formed between phenolic resin and nano-SiO₂ in alcohol, made nano-SiO₂ disperse easily in EP/MNA paint through phenolic resin without being treated by supersonic vibration. When the mass ratio of PF to EP in paint is 3:7, the formed composite paint film can be cured in 2 min at 170 °C. When the mass ratio of nano-SiO₂ to PF in paint is 3:100, the property of high humidity resistance of the composite paint is the best, meeting the requirement of varying ratio of resistance less than 0.1% after experiment on high humidity resistance. SEM analysis shows the surface of the composite paint film is smooth, glassy, tight and homogeneous, without acicular air holes.  相似文献