An object of the present invention is to provide an epoxy resin composition excellent in elastic modulus and strength, and a prepreg and a fiber reinforced composite material with the epoxy resin composition. The present invention is the epoxy resin composition including the following components [A] to [C] and satisfying the following conditions (1) to (3): [A]: epoxy resin [B]: aromatic diamine [C]: a compound having a boiling point of 130° C. or more and a molecular weight m of 50 or more and 250 or less, the compound having no epoxy group in the molecule and having substantially no curing ability of an epoxy resin

(1): at least a part of the component [C] satisfies that the sum of the polar component and the hydrogen bond component in the Hansen solubility parameters is 10.0 or more.

(2): at least a part of the component [C] satisfies that the Hansen solubility parameter distance L to the component [A] is 20.0 or less.

(3): the ratio H/E between the amount by mole, E, of the epoxy group of the component [A] and the amount by mole, C, of the component [C] satisfying both the condition (1) and the condition (2) is 0.01 or more and 0.20 or less.

(4): the viscosity at 70° C. for 2 hours is 5.0 times or less the initial viscosity at 70° C.

An object of the present invention is to provide an epoxy resin composition excellent in elastic modulus and strength, and a prepreg and a fiber reinforced composite material with the epoxy resin composition. The present invention is the epoxy resin composition including the following components [A] to [C] and satisfying the following conditions (1) to (3): [A]: epoxy resin [B]: aromatic diamine [C]: a compound having a boiling point of 130° C. or more and a molecular weight m of 50 or more and 250 or less, the compound having no epoxy group in the molecule and having substantially no curing ability of an epoxy resin

(1): at least a part of the component [C] satisfies that the sum of the polar component and the hydrogen bond component in the Hansen solubility parameters is 10.0 or more.

(2): at least a part of the component [C] satisfies that the Hansen solubility parameter distance L to the component [A] is 20.0 or less.

(3): the ratio H/E between the amount by mole, E, of the epoxy group of the component [A] and the amount by mole, C, of the component [C] satisfying both the condition (1) and the condition (2) is 0.01 or more and 0.20 or less.

(4): the viscosity at 70° C. for 2 hours is 5.0 times or less the initial viscosity at 70° C.

An object of the present invention is to provide an epoxy resin composition that can be preferably used for prepreg and fiber reinforced composite material applications and is excellent in elastic modulus, strength, and pot life.

The present invention is the epoxy resin composition including the following components [A] to [C] and satisfying the following conditions (1) to (3): [A]: epoxy resin [B]: polyamine curing agent, and [C]: a compound having a boiling point of 130° C. or more and a molecular weight m of 50 or more and 250 or less, the compound having no epoxy group in the molecule and having substantially no curing ability of an epoxy resin, and (1): at least a part of the component [C] has two or more alcoholic hydroxyl groups in the molecule. (2): the ratio C/E of the amount by mole, E, for epoxy groups of the component [A] to the amount by mole, C, of the component [C] satisfying the condition (1) is 0.01 or more and 0.20 or less. (3): the viscosity at 70° C. for 2 hours is 5.0 times or less the initial viscosity at 70° C.

An object of the present invention is to provide an epoxy resin composition that can be preferably used for prepreg and fiber reinforced composite material applications and is excellent in elastic modulus, strength, and pot life.

The present invention is the epoxy resin composition including the following components [A] to [C] and satisfying the following conditions (1) to (3): [A]: epoxy resin [B]: polyamine curing agent, and [C]: a compound having a boiling point of 130° C. or more and a molecular weight m of 50 or more and 250 or less, the compound having no epoxy group in the molecule and having substantially no curing ability of an epoxy resin, and (1): at least a part of the component [C] has two or more alcoholic hydroxyl groups in the molecule. (2): the ratio C/E of the amount by mole, E, for epoxy groups of the component [A] to the amount by mole, C, of the component [C] satisfying the condition (1) is 0.01 or more and 0.20 or less. (3): the viscosity at 70° C. for 2 hours is 5.0 times or less the initial viscosity at 70° C.

The present invention provides a chitosan-based composition that can be converted into a self-supporting casted object having good tensile and compressive strength that can also biodegrade at the end of its lifecycle. The composition comprises entirely bio-based or bio-sourced reagents that can be converted to the final product via a polymerization process that does not require the addition of inorganic catalysts, synthetic materials, or otherwise hazardous chemicals to strengthen or modify its water resistance.

The present invention provides a chitosan-based composition that can be converted into a self-supporting casted object having good tensile and compressive strength that can also biodegrade at the end of its lifecycle. The composition comprises entirely bio-based or bio-sourced reagents that can be converted to the final product via a polymerization process that does not require the addition of inorganic catalysts, synthetic materials, or otherwise hazardous chemicals to strengthen or modify its water resistance.

An inverted roof and a method of installing the inverted roof, and in particular to an inverted roof including cellular glass insulation material having a protective alkali silicate coating on the upper surface of the cellular glass insulation material.

Described herein is a water vapor barrier coating composition that is especially useful for paper-based packaging applications. The composition includes a basecoat layer and a topcoat layer that are applied to fibrous substrates in sequential order as aqueous coatings. The basecoat layer is applied and dried and then the topcoat layer is applied and dried. The basecoat layer includes an aqueous solution of ethylenically modified polyvinyl alcohol and optionally a plasticizer. The topcoat layer includes an aqueous polymeric dispersion or emulsion, compatibilized with the base layer by adding a small percentage of ethylenically modified polyvinyl alcohol solution, and optionally a viscosity modifier, defoamer, release agent, slip agent, crosslinker, and/or anti-blocking additive. The composition includes a synergistic interaction between the basecoat and the topcoat. The composition is optionally biodegradable and/or compostable, along with a coated paper stock, without the need to separate and reprocess the coating.

Described herein is a water vapor barrier coating composition that is especially useful for paper-based packaging applications. The composition includes a basecoat layer and a topcoat layer that are applied to fibrous substrates in sequential order as aqueous coatings. The basecoat layer is applied and dried and then the topcoat layer is applied and dried. The basecoat layer includes an aqueous solution of ethylenically modified polyvinyl alcohol and optionally a plasticizer. The topcoat layer includes an aqueous polymeric dispersion or emulsion, compatibilized with the base layer by adding a small percentage of ethylenically modified polyvinyl alcohol solution, and optionally a viscosity modifier, defoamer, release agent, slip agent, crosslinker, and/or anti-blocking additive. The composition includes a synergistic interaction between the basecoat and the topcoat. The composition is optionally biodegradable and/or compostable, along with a coated paper stock, without the need to separate and reprocess the coating.

Described herein is a cast elastomer including graphene nano platelets and a process for preparing the same.