Mitsubishi Rayon Company, Limited

Junichi Muramatsu

Akihiro Ito

Kiharu Numata

Tsuneo Takano

Masato Taguchi

Kazuya Goto

Kazuki Koga

Akitada Yanase

Tadashi Sakai

Yasuo Takagi

Yasuhiro Fukuhara

Tadayoshi Saitou

Ietsugu Santo

Mina Oobayashi

An epoxy resin composition suitably used for a prepreg which can complete curing in a short time even at a low temperature and secure a sufficient usable period under preservation at room temperature, in comparison with conventional epoxy resin compositions. An epoxy resin composition comprising at least one of an epoxy resin, an amine compound having at least one sulfur atom in the molecule thereof, and a reaction product of an epoxy resin and an amine compound having at least one sulfur atom in the molecule thereof, and an amine compound having at least one sulfur atom in the molecule thereof, and a urea compound and a dicyandiamide, wherein each of the contents of the sulfur atom and the urea compound in the epoxy resin composition is respectively 0.2 to 7% by mass and 1 to 15% by mass.

Epoxy resin for prepreg, prepreg, and fiber-reinforced composite material and methods for production thereof

Epdxy resin for prepreg, prepreg, fiber-reinforced composite material, and methods for production thereof

Epoxy resin for prepreg, prepreg, fiber-reinforced composite material and methods for production thereof

A prepreg is provided capable of being a composite material having suitable high heat resistance, impact resistance, and mechanical properties under high temperature and high humidity conditions. As the matrix resin, a composition including a specific epoxy resin component (A), a specific bifunctional epoxy resin (B), a specific tetrafunctional epoxy resin (C), and a specific aromatic amine compound (D) at specific proportions are used. Particularly, as the epoxy resin component (A), one obtained by mixing and heating a bifunctional epoxy resin (a1), a trifunctional epoxy resin (a2), a phenol compound (a3), and a specific polyamide resin (a4) is used so as to be able to solve the above-described problems.

Prepreg

A method for producing a fiber-reinforced composite material plate by heating and pressurizing a prepreg for a molding time of 15 minutes or less, at a molding temperature of at least 120&#xb0; C. and a molding pressure of at least 10 kg/cm. The prepreg is prepared from a reinforcing fiber and an epoxy resin composition. The epoxy resin composition features: an epoxy resin; an amine compound having at least one sulfur atom in the molecule thereof and/or a reaction product of the epoxy resin and the amine compound having at least one sulfur atom in the molecule thereof; a urea compound; and a dicyandiamide. The contents of the sulfur atom and the urea compound in the epoxy resin composition are respectively 0.2 to 7% by mass and 1 to 15% by mass.

Method for producing a fiber-reinforced composite material plate

Growing community of inventors

Toyohashi, Japan

Junichi Muramatsu