Abstract: A gas diffusion electrode medium is for a fuel cell, has a low in-plane gas permeability and favorable water drainage characteristics in addition to high conductivity, and is able to exhibit high cell performance across a wide temperature range from low temperatures to high temperatures. The gas diffusion electrode medium is characterized by a microporous region being disposed at least at one surface of an electrode substrate, and the microporous region containing flake graphite having an aspect ratio of 50-5000.

Abstract: The carbon fiber forming raw material is a carbon fiber forming raw material (Z) as a prepreg including sizing agent-coated carbon fibers and a thermosetting resin or a carbon fiber forming raw material (Y) as a forming material that includes sizing agent-coated carbon fibers and has a woven fabric form or a braid form. The sizing agent includes components (A) and (B). The component (A) is an epoxy compound having two or more epoxy groups or two or more types of functional groups. The component (B) is one or more compounds selected from the group consisting of a tertiary amine compound, a tertiary amine salt, a quaternary ammonium salt, a quaternary phosphonium salt, and a phosphine compound. The component (B) is contained in an amount of 0.1 to 25 parts by mass relative to 100 parts by mass of the component (A).

Abstract: A gas diffusion medium for a fuel cell includes a microporous region [A], an electrode base material, and a microporous region [B] arranged in the order mentioned, wherein the microporous region [A] has an areal ratio of 5 to 70%, and the microporous region [B] has an areal ratio of 80 to 100%.

Abstract: Provided are a carbon fiber-reinforced thermoplastic resin composition excellent in interfacial adhesion between carbon fiber and a thermoplastic resin and excellent in dynamic characteristics, and a molding material, a prepreg, and a method for producing the same. The carbon fiber-reinforced thermoplastic resin composition includes the following components (A) and (B), carbon fiber and a thermoplastic resin; component (A): (A1) a bifunctional or higher functional epoxy compound and/or (A2) an epoxy compound which has a monofunctional or higher epoxy group and has one or more taypes of functional groups selected from a hydroxyl group, an amide group, an imide group, a urethane group, a urea group, a sulfonyl group and a sulfo group; and component (B): 0.

Abstract: Disclosed is a method for producing carbon fibers which exhibit excellent adhesion to a matrix resin and have excellent processability. Specifically disclosed is a method for producing a sizing agent-coated carbon fibers, wherein at least one kind of sizing agent that is selected from the group consisting of sizing agents (a), (b) and (c) described below is used for coating, in each of said sizing agents a bi- or higher functional epoxy compound (A1) and/or an epoxy compound (A2) being used as a component (A), and said epoxy compound (A2) having a mono- or higher functional epoxy group and at least one functional group that is selected from among a hydroxyl group, an amide group, an imide group, a urethane group, a urea group, a sulfonyl group and a sulfo group. The method for producing a sizing agent-coated carbon fibers is characterized in that the sizing agent is applied to carbon fibers and the resulting is subjected to a heat treatment within the temperature range of 160-260° C. for 30-600 seconds.

Abstract: Disclosed herein are an epoxy resin composition for fiber-reinforced composite materials which has low viscosity, high Tg, high elastic modulus, and excellent fracture toughness and a fiber-reinforced composite material using such an epoxy resin composition which has excellent thermal properties, compressive strength, impact resistance, fatigue resistance, and open-hole tensile strength and which is suitable for producing structural parts of aircraft and the like. The epoxy resin composition comprises at least a given bifunctional epoxy resin as a component (A), a liquid aromatic diamine curing agent as a component (B), and core-shell polymer particles as a component (C), wherein the core-shell polymer particles as the component (C) contain epoxy groups in their shell and have a volume-average particle size of 50 to 300 nm.

Abstract: An embodiment of the invention relates to an epoxy resin composition for fiber reinforced composite material having an epoxy resin that is liquid at room temperature (component 1), aromatic polyamine that is liquid at room temperature (component 2) and diaminodiphenylsulfone (component 3). The proportion of component (1) relative to the entire epoxy resin in the composition is 60-100 wt %. The sum of the proportions of components (2) and (3) relative to the entire polyamine in the composition is 70-100 wt %. The proportion of component (3) relative to the entire polyamine in the composition is 25-60 wt %. The stoichiometric ratio of the entire polyamine to the entire epoxy resin in the composition is 0.7-1.3. Additional embodiments of the invention relate to other aspects of the invention.

Abstract: An embodiment of the invention relates to an epoxy resin composition for fiber reinforced composite material having an epoxy resin that is liquid at room temperature (component 1), aromatic polyamine that is liquid at room temperature (component 2) and diaminodiphenylsulfone (component 3). The proportion of component (1) relative to the entire epoxy resin in the composition is 60-100 wt %. The sum of the proportions of components (2) and (3) relative to the entire polyamine in the composition is 70-100 wt %. The proportion of component (3) relative to the entire polyamine in the composition is 25-60 wt %. The stoichiometric ratio of the entire polyamine to the entire epoxy resin in the composition is 0.7-1.3. Additional embodiments of the invention relate to other aspects of the invention.

Abstract: An epoxy resin composition comprises (a) an epoxy resin, (b) an anionic polymerization initiator and (c) from 1 to 30 parts by weight per 100 parts by weight of epoxy resin (a) of an aromatic ring-containing proton donor of a polyhydric alcohol and/or a polymercaptan.

Abstract: An embodiment of the invention relates to an epoxy resin composition for fiber reinforced composite material having an epoxy resin that is liquid at room temperature (component 1), aromatic polyamine that is liquid at room temperature (component 2) and diaminodiphenylsulfone (component 3). The proportion of component (1) relative to the entire epoxy resin in the composition is 60-100 wt %. The sum of the proportions of components (2) and (3) relative to the entire polyamine in the composition is 70-100 wt %. The proportion of component (3) relative to the entire polyamine in the composition is 25-60 wt %. The stoichiometric ratio of the entire polyamine to the entire epoxy resin in the composition is 0.7-1.3. Additional embodiments of the invention relate to other aspects of the invention.

Abstract: An epoxy resin composition comprises (a) an epoxy resin, (b) an anionic polymerization initiator and (c) from 1 to 30 parts by weight per 100 parts by weight of epoxy resin (a) of an aromatic ring-containing proton donor of a polyhydric alcohol and/or a polymercaptan.

Abstract: An epoxy resin composition comprises (a) an epoxy resin, (b) an anionic polymerization initiator and (c) from 1 to 30 parts by weight per 100 parts by weight of epoxy resin (a) of an aromatic ring-containing proton donor of a polyhydric alcohol and/or a polymercaptan.

Abstract: The present invention relates to an epoxy resin composition for fiber reinforced composite material comprising the following components (1)-(3) as essential components, their mixing ratios meeting the following conditions (I)-(IV), and component (3) being dissolved homogeneously:

Abstract: The present invention relates to an epoxy resin composition consisting of components (a), (b) and (c) defined below, wherein the amount of component (c) based on 100 parts by weight of component (a) is 1 to 30 parts by weight; component (a) is liquid; and components (b) and (c) are homogeneously dissolved in component (a):

Abstract: This invention relates to an epoxy resin composition for a fiber-reinforced composite material, which contains the following constituent components (A), (B) and (C).

Abstract: An epoxy resin composition having a low viscosity around a room temperature and excellent reinforcing fiber impregnating properties provides a composite material having excellent heat resistance and mechanical properties including compressive strength. The epoxy resin composition includes an aromatic epoxy resin having at least di-functionality, an aromatic amine compound and/or an alicyclic amine compound, wherein 5 minutes after the main agent comprising the epoxy resin and the curing agent comprising the aromatic amine compound and/or the alicyclic amine compound are mixed, the composition shows a viscosity at 25° C. in the range of from 1 to 1500 mPa sec, and Tc, tc, and Tg satisfy the following equation (1): Tg≧Tc+20−k×(Tc−90)  (1), wherein k=0 when 60≦Tc<90 and k=0.35 when 90≦Tc≦200; Tc is the highest temperature (°C.