ATMOSPHERIC TEMPERATURE LIQUID SOLVENTLESS THERMOSETTING COMPOSITION AND METHOD FOR PRODUCING THE SAME

To provide an atmospheric temperature liquid solventless thermosetting composition which provides a cured product excellent in heat resistance, and a method for producing the same.SOLUTION: An atmospheric temperature liquid solventless thermosetting composition is obtained by charging an atmospheric temperature solid bisphenol A type cyanate resin and P-d type benzoxazine into an atmospheric temperature liquid bisphenol A type epoxy resin, heating and mixing the mixture at 100°C for 4 hours, and cooling the mixture to an atmospheric temperature. A compatible material is obtained by charging atmospheric temperature solid 4,4'-diphenylmethane bismaleimide into an atmospheric temperature liquid bisphenol A type epoxy resin, heating and mixing the mixture at 150°C for 3 hours, and cooling the mixture. An atmospheric temperature liquid solventless thermosetting composition is obtained by charging an atmospheric temperature solid bisphenol A type cyanate resin and P-d type benzoxazine into the compatible material, heating and mixing the mixture at 100°C for 4 hours, and cooling the mixture to an atmospheric temperature. A cured product excellent in heat resistance is obtained by heating the thermosetting composition to 150°C to temporarily cure the composition, and then heating the composition to 200°C to finally cure the composition.SELECTED DRAWING: None 【課題】 耐熱性に優れた硬化物を与える、常温液状の無溶剤型熱硬化性組成物及びその製造方法を提供する。【解決手段】 常温液状のビスフェノールＡ型エポキシ樹脂に、常温固形のビスフェノールＡ型シアネート樹脂及びＰ－ｄ型ベンゾオキサジンを投入し、１００℃で４時間加熱混合し、常温に冷却して、常温液状の無溶剤型熱硬化性組成物を得る。また、常温液状のビスフェノールＡ型エポキシ樹脂に、常温固形の４，４'－ジフェニルメタンビスマレイミドを投入し、１５０℃で３時間加熱混合し、冷却して相溶物を得る。この相溶物に、常温固形のビスフェノールＡ型シアネート樹脂及びＰ－ｄ型ベンゾオキサジンを投入し、１００℃で４時間加熱混合し、常温に冷却して、常温液状の無溶剤型熱硬化性組成物を得る。この熱硬化性組成物を１５０℃に加熱すると仮硬化し、その後、２００℃に加熱すると本硬化して、耐熱性に優れた硬化物が得られる。【選択図】 なし