MQO树脂为基体研制电路板组件保形涂覆液

Preparation of conformal coating for printed circuit board assemblies with silicone resin polymeric matrix

采用新型功能添加剂,在缩短硫化时间避免涂膜难干或发粘的同时,解决了体系储存稳定性下降的问题;选择使用阻燃剂,有效提高其阻燃性并赋予涂覆膜自熄性,且保证涂膜原有的透明性;最终成功制备出透明保形涂覆液。涂覆液固化时间短(20min内完全表干),涂膜具有良好的粘附力且阻燃性好(氧指数为49%),介电强度高(37kV/mm),完全可以满足实际电路板涂覆生产线要求。

MQO silicone resin as raw material, one kind of conformal coating with high stability for electronic circuit board assemblies was developed, which showed short cure time in presence of a functional additive. The fire retardant performance and super transparence of coating were also obtained. With good adhesion to the electronic circuit board substrate, short cure time （about 20 minutes）, good flame retardant performance （Oxygen Index 49%） and high electric breakdown strength （37kV/mm）, the conformal coating can be satisfied for the actual circuit board production line.