Epoxy resin composition for fiber-reinforced composite material

C - Chemistry – Metallurgy – 08 – G

Patent

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C08G 59/56 (2006.01) C08J 5/24 (2006.01)

Patent

CA 2650563

Disclosed is an epoxy resin composition for fiber-reinforced composite materials, which serves as a matrix resin for a prepreg. This epoxy resin composition is improved in tackiness stability during storage, while maintaining mechanical characteristics. The epoxy resin composition for fiber-reinforced composite materials is characterized by containing 25-50 parts by weight of an amine curing agent (B) selected from aliphatic polyamines, alicyclic polyamines and aromatic polyamines, and 1-20 parts by weight of an organic acid dihydrazide compound (C) having a melting point of not less than 150~C, per 100 parts by weight of an epoxy resin (A).

L'invention concerne une composition de résine époxy destinée à des matériaux composites renforcés par fibres, servant de résine matricielle pour un préimprégné. La composition de résine époxy présente une meilleure stabilité d'adhérence lors du stockage, tout en conservant ses caractéristiques mécaniques. La composition de résine époxy destinée à des matériaux composites renforcés par fibres est caractérisée en ce qu'elle contient 25 à 50 parts en poids d'un agent de durcissage amine (B) choisi parmi des polyamines aliphatiques, des polyamines alicycliques et des polyamines aromatiques, et 1 à 20 parts en poids d'un composé de dihydrazide d'acide organique (C) présentant un point de fusion non inférieur à 150°C, pour 100 parts en poids d'une résine époxy (A).

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