| 摘要 |
<p>PURPOSE:To provide the titled compsn. excellent in electrical characteristics, flame retardance and safety, and well suited for preparation of flyback transformers, by incorporating acid anhydrides, reaction accelerators, and hydrated aluminum powder and red phosphorus in a particular wt. ratio with epoxy resins. CONSTITUTION:Acid anhydrides (e.g., methyltetrahydrophthalic anhydride) as curing agents and reaction accelerators (e.g., 2-ethyl-4-methylimidazole) are mixed with epoxy resins. Furthermore, hydrated aluminum powder and red phosphorus, as flame retardants and fillers, are incorporated with the mixture so that the amts. of hydrated alumina powder and red phosphorus to be blended with 100pts.wt. epoxy resin are within limits enclosed with lines connecting points A, B, C, D, E, F, G, an H slown in the table in order, yielding the intended epoxy resin compsn. Flyback transformers subjected to insulation treatment with said compsn. do not generate harmful gases on burning.</p> |
