申请人:Sumitomo Chemical Company, Limited
公开号:EP2025695A1
公开(公告)日:2009-02-18
An epoxy resin composition comprising an epoxy compound represented by the formula (1):
wherein Ar1, Ar2 and Ar3 each denotes any one of divalent groups represented by the following formulas:
a curing agent and an alumina powder, wherein the alumina powder is a mixture of an alumina (A) having D50 of 2 µm or more and 100 µm or less, an alumina (B) having D50 of 1 µm or more and 10 µm or less, and an alumina (C) having D50 of 0.01 µm or more and 5 µm or less, in which D50 is a particle size at 50% cumulation from the smallest particle side of a weight cumulative particle size distribution, and the content of the alumina (A), that of the alumina (B) and that of the alumina (C) are respectively 50% by volume or more and 90% by volume or less, 5% by volume or more and 40% by volume or less, and 1% by volume or more and 30% by volume or less, based on the volume of the alumina powder (provided that the total % by volume of the alumina (A), the alumina (B) and the alumina (C) is 100% by volume).
一种环氧树脂组合物,由式 (1) 所代表的环氧化合物组成:
其中 Ar1、Ar2 和 Ar3 分别表示由下列式子表示的二价基团中的任意一个:
一种固化剂和一种氧化铝粉末,其中氧化铝粉末是一种氧化铝 (A) 的混合物,氧化铝 (A) 的 D50 为 2 µm 或以上且 100 µm 或以下;一种氧化铝 (B) 的 D50 为 1 µm 或以上且 10 µm 或以下;以及一种氧化铝 (C) 的 D50 为 0.01 微米或更大和 5 微米或更小的氧化铝(C),其中 D50 是指从重量累积粒度分布的最小颗粒侧累积 50%时的粒度,氧化铝(A)、氧化铝(B)和氧化铝(C)的含量分别为 50%(体积)或更大和 90%(体积)或更小、以氧化铝粉末的体积为基准,氧化铝(A)、氧化铝(B)和氧化铝(C)的总体积百分比为 100%,则氧化铝(A)、氧化铝(B)和氧化铝(C)的体积百分比分别为 50%(体积)或以上和 90%(体积)或以下、5%(体积)或以上和 40%(体积)或以下,以及 1%(体积)或以上和 30%(体积)或以下。