| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject composition of two-pack type showing excellent casting workability, slight in filler precipitation in storage, capable of developing excellent nonconductivity, useful for insulating electric instruments, by using a component prepared by mixing a specific acid anhydride with a prescribed inorganic filler and a curing promoter. SOLUTION: This epoxy resin composition of two-pack type comprises (A) a component obtained by mixing an acid anhydride (A1 ) containing methyltetrahydrophthalic anhydride (A1 ') and methylhexahydrophthalic anhydride (A1 ") as essential components with an inorganic filler (A2 ) containing a spherical silica having <=2μm average particle diameter (A2 ') as an essential component and a curing promoter (A3 ) and (B) an epoxy resin. Preferably, the component A comprises 10-90 pts.wt. of the component A1 " based on 50 pts.wt. of the component A1 ' and 50-500 pts.wt. of the component A2 and 0.1-10 pts.wt. of the component A3 based on 100 pts.wt. of the component A1 . |
