Epoxy resin composition for fiber-reinforced composite material

Abstract

The present invention is an epoxy resin composition for a fiber-reinforced composite material, which comprises phosphorous-containing epoxy resin that contains phosphorous in the skeleton thereof, dicyandiamide, and a curing promoter comprising at least one compound selected from 1,1'-(4-methyl-1,3-phenylene)bis(3,3-dimethylurea), phenyl-dimethylurea represented by formula (1) and methylene-diphenyl-bisdimethylurea represented by formula (2), and which is characterized in that the content of phosphorous in the phosphorous-containing epoxy resin is 1.0 to 5.0 mass% inclusive in the epoxy resin composition.

Description

technical field [0001] The present invention relates to an epoxy resin composition for a fiber-reinforced composite material capable of providing a carbon fiber-reinforced composite material excellent in curability and flame retardancy, and having excellent storage stability. Background technique [0002] Fiber-reinforced composite materials using thermosetting resins such as epoxy resins as matrix resins, especially carbon fiber-reinforced composite materials using carbon fibers, are currently widely used in aircrafts, vehicles, etc. due to their light weight and excellent mechanical properties. Structural materials, reinforcement of concrete structures, sports fields such as golf clubs, tennis rackets, fishing rods, etc. are represented in various fields. In addition, carbon fiber-reinforced composite materials not only have excellent mechanical properties, but also have excellent electromagnetic shielding properties due to the conductivity of carbon fibers, so they are al...

AI Technical Summary

Problems solved by technology

[0015] Therefore, with the existing technology, it is difficult to obtain a cured product with excellent physical properties and good flame retardancy, taking into account the impact on the human body and the environment.

Therefore, as a flame-retardant epoxy resin composition, there is no one that can be cured at about 120°C, which not only takes into account the environment, but also has excellent storage stability, and at the same time can obtain good flame retardancy and excellent physical properties. Flame retardant epoxy resin composition of the cured product

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