Abstract: Provided is a curable epoxy composition capable of forming a cured product having excellent heat resistance even in a high temperature environment. A first curable epoxy composition includes an alicyclic epoxy compound (A) having an alicyclic structure and an epoxy group in a molecule, an acid anhydride-based curing agent (B), and an imidazole-based curing accelerator (C), and is liquid at 25° C. and to be used for a rotary electric machine. A second curable epoxy composition includes an alicyclic epoxy compound (A) having an alicyclic structure and an epoxy group in a molecule, an acid anhydride-based curing agent (B), an imidazole-based curing accelerator (C), and a polyester polyol (D), and is to be used for a rotary electric machine.

Abstract: Provided is a curable composition that forms a fiber-reinforced composite material having excellent heat resistance. The curable composition of the present disclosure includes a compound (1), a compound (2), and a Lewis acid catalyst, the compound (1) being represented by Formula (1), the compound (2) being represented by Formula (2), and the weight ratio of the content of the compound (1) to the content of the compound (2) is from 10/90 to 40/60. The Lewis acid catalyst is preferably a catalyst of a base and a Lewis acid, and particularly preferably is a complex formed by the Lewis acid and an amine. The Lewis acid is represented by Formula (3): MXn (3), where M represents a metal atom selected from B, Al, Fe, Sn, Si, Zn, and Ti, X represents a halogen atom, and n indicates an oxidation number of the metal atom.

Abstract: Provided is a sheet-shaped mold possessing a high strength and having a low breakage rate in demolding even in a case where the mold is thin and has a large-area. The sheet-shaped mold is prepared by combining a cured silicone rubber containing a polyorganosiloxane and a fiber for reinforcing the cured silicone rubber. The fiber may comprise a cellulose nanofiber. The sheet-shaped mold may have an uneven pattern on at least one surface (or side) thereof. The fiber may be surface-treated with a hydrophobizing agent. The fiber may forma nonwoven fabric, and the nonwoven fabric may be impregnated with the cured silicone rubber. The cured silicone rubber may comprise a two-component curable silicone rubber having a polydimethylsiloxane unit. The sheet-shaped mold may be a mold for nanoimprint lithography using a photo-curable resin.

Abstract: An object of the present invention is to provide a composition for a fiber-reinforced composite material, the composition being capable of forming the fiber-reinforced composite material excellent in work stability, high in curing speed and high in heat resistance, and particularly suitable for production of a continuous fiber-reinforced composite material by a pultrusion method.

Abstract: Provided is a sheet-shaped mold possessing a high strength and having a low breakage rate in demolding even in a case where the mold is thin and has a large-area. The sheet-shaped mold is prepared by combining a cured silicone rubber containing a polyorganosiloxane and a fiber for reinforcing the cured silicone rubber. The fiber may comprise a cellulose nanofiber. The sheet-shaped mold may have an uneven pattern on at least one surface (or side) thereof. The fiber may be surface-treated with a hydrophobizing agent. The fiber may forma nonwoven fabric, and the nonwoven fabric may be impregnated with the cured silicone rubber. The cured silicone rubber may comprise a two-component curable silicone rubber having a polydimethylsiloxane unit. The sheet-shaped mold may be a mold for nanoimprint lithography using a photo-curable resin.