| 摘要 |
PROBLEM TO BE SOLVED: To provide an epoxy resin composition which provides a low dielectric loss tangent of≤3×10<SP>-3</SP>, even at a high frequency of 1 GHz; provides a rapid cure rate and has an excellent shelf stability, its pre-cured product and a cured product. SOLUTION: The epoxy resin composition essentially comprises an epoxy resin, an active ester compound and a hardening accelerator, wherein the hardening accelerator comprises an imidazole compound and a tertiary amine compound. Here, the total content of the imidazole compound and the tertiary amine compound is 0.2-1.5 pts.mass against 100 pts.mass (A) epoxy resin, and the content of the tertiary amine compound is 0.1-0.3 pts.mass. The pre-cured product and the cured product are prepared from this composition. COPYRIGHT: (C)2003,JPO |
