| 摘要 |
PROBLEM TO BE SOLVED: To obtain a halogen-free epoxy resin composition containing elastic fine particles, having satisfied flame retardance and heat resistance and suitable for printed wiring boards. SOLUTION: This resin composition comprises a bisphenol F type epoxy resin as a bifunctional epoxy resin, a tri- or a polyfunctional epoxy resin or a phosphorus containing epoxy resin, the elastic fine particles incompatible with the epoxy resins, aluminum hydroxide as an inorganic filler, zinc stannate as a flame retarding aid and a novolak resin of phenols as a curing agent. The substantially nonhalogen resin composition is obtained by adjusting the content of the zinc stannate to >=5 pts.mass based on 100 pts.mass of resin solid contents. |
