| 摘要 |
PURPOSE:The titled composition useful for insulating treatment for various high-tension coils, having low viscosity and improved impregnating properties, obtained by blending an epoxy resin with a liquid bromine compound, antimony trioxide, inorganic powder and a curing agent of a liquid acid anhydride type in a specific ratio. CONSTITUTION:(A) 100pts.wt. epoxy resin such as bisphenol A diglycidyl ether, etc. is blended with (B) 15-40pts.wt. low-viscosity, liquid bromine compound having about 50wt% bromine content, such as dibromophenylglycidyl ether, dibromocresylglycidyl ether, etc., (C) 5-20pts.wt. antimony trioxide, (D) 100-250 pts.wt. inorganic powder such as silica, hydrated alumina, etc. (one having improved electrical insulating properties), (E) a curing agent of a liquid acid anhydride type (e.g., methyltetrahydrophthalic anhydride, etc.), and a small amount of a reaction promoter (preferably imidazole compound).
|
