| 摘要 |
PURPOSE:To obtain the titled composition resistant to the lowering of the dielectric breakdown voltage after PCT, and suitable for electronic parts such as IC, by compounding a base resin with aluminum hydroxide having a specific electrical conductivity and modified red phosphorus. CONSTITUTION:100pts.wt. of a resin (e.g. epoxy resin) is compounded with a flame-retardant filler giving an electrical conductivity of <=50muV/cm at room temperature when leached with pure water, and of <=100muV/cm after boiling for 15min, and composed of (A) 2-10pts. of modified red phosphorus obtained by coating the surface of red phosphorus particle with an inert substance (e.g. aluminum hydroxide, thermosetting resin, etc.) and having an average particle diameter of 8-30mum and containing particles of <=5mu diameter accounting for <=5% of the whole particles and (B) 50-120pts. of aluminum hydroxide. The ratio of the component A:B is 1:(1-40), preferably 1:(5-30), and the amount of the flame-retardant filler is 30-60wt% based on the whole resin composition.
|
