Process for preparing composites using epoxy resin compositions

C - Chemistry – Metallurgy – 08 – G

Patent

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C08G 59/50 (2006.01) C08G 59/62 (2006.01)

Patent

CA 2690781

The invention is a process for making reinforced composites using an epoxy resin composition. The epoxy resin compositions are hardened using a gemdi(cyclohexylamine)-substituted alkane as a hardener and a tertiary amine compound, a heat-activated catalyst, or a mixture thereof as an accelerator. This epoxy resin composition has a long open time, and then cures rapidly in a mold in the presence of a reinforcement. These cure characteristics make the composition well suited for use in manufacturing processes such as resin transfer molding (RTM), vacuum-assisted resin transfer molding (VARTM), Seeman Composites Resin Infusion Molding Process (SCRIMP) and reaction injection molding (RIM).

L'invention concerne un procédé de fabrication de composites renforcés utilisant une composition de résine époxy. Les compositions de résine époxy sont durcies en utilisant un alcane à substitution gemdi(cyclohexylamine) en tant qu'agent de durcissement et un composé d'amine tertiaire, un catalyseur activé par la chaleur ou un mélange de ces composants en tant qu'accélérateur. Cette composition de résine époxy présente un long temps ouvert, puis durcit rapidement dans un moule en présence d'un renfort. Ces caractéristiques de durcissement rendent la composition bien appropriée pour une utilisation dans des procédés de fabrication tels que le moulage par injection de résine (RTM), le moulage par injection de résine sous vide (VARTM), le procédé SCRIMP (Seeman Composites Resin Infusion Molding Process) et le moulage par injection-réaction (RIM).

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