A cyanate ester resin composition contains: a cyanate ester resin; a curing agent or a curing accelerator; silica microparticles; and core-shell rubber particles; in which the resin composition includes from 1 to 5 parts by mass of the silica microparticles and from 2 to 10 parts by mass of the core-shell rubber particles based on 100 parts by mass of the cyanate ester resin, and a mass ratio of the silica microparticles to the core-shell rubber particles is from 1/1 to 1/5.

Provided are a coating composition or the like which is highly wettable to a plastic substrate and which can form a hardcoat layer having high adhesiveness to the substrate and favorable appearance on the plastic substrate. A coating composition for forming a hardcoat layer for a plastic substrate including (A) an organosilicon compound represented by general formula: R.sup.1R.sup.2.sub.aSi(OR.sup.3).sub.3-a(R.sup.1 to R.sup.3 each represent a hydrocarbon group or the like, and a is 0 or 1), a hydrolysate thereof, etc, (B) silica-based fine particles, (C) a curing agent including polycarboxylic acid, etc, and a cyanamide derivative compound, (D) a leveling agent, and (E) a solvent including respective predetermined amounts of water and an organic solvent.

Provided are a coating composition or the like which is highly wettable to a plastic substrate and which can form a hardcoat layer having high adhesiveness to the substrate and favorable appearance on the plastic substrate. A coating composition for forming a hardcoat layer for a plastic substrate including (A) an organosilicon compound represented by general formula: R.sup.1R.sup.2.sub.aSi(OR.sup.3).sub.3-a(R.sup.1 to R.sup.3 each represent a hydrocarbon group or the like, and a is 0 or 1), a hydrolysate thereof, etc, (B) silica-based fine particles, (C) a curing agent including polycarboxylic acid, etc, and a cyanamide derivative compound, (D) a leveling agent, and (E) a solvent including respective predetermined amounts of water and an organic solvent.

A composition comprising: a substance (A) comprising at least one metal atom selected from the group consisting of zinc, cobalt, niobium, zirconium, cadmium, copper, nickel, chromium, vanadium, titanium, molybdenum, magnesium, iron and aluminum, with the proviso that a metal organic framework is excluded; an organic substance (B) having at least two metal coordination sites capable of being coordinated to the metal atom to form a crystal, wherein the metal coordination sites are of at least one type selected from the group consisting of a carboxy group and a metal organic framework; and a coordination promoter (C) that undergoes a reaction or a phase transition upon stimulation to promote the coordination of the metal coordination sites of the organic substance (B) to the metal atom of the substance (A).

A composition comprising: a substance (A) comprising at least one metal atom selected from the group consisting of zinc, cobalt, niobium, zirconium, cadmium, copper, nickel, chromium, vanadium, titanium, molybdenum, magnesium, iron and aluminum, with the proviso that a metal organic framework is excluded; an organic substance (B) having at least two metal coordination sites capable of being coordinated to the metal atom to form a crystal, wherein the metal coordination sites are of at least one type selected from the group consisting of a carboxy group and a metal organic framework; and a coordination promoter (C) that undergoes a reaction or a phase transition upon stimulation to promote the coordination of the metal coordination sites of the organic substance (B) to the metal atom of the substance (A).

A process for the production of a multiple-walled carbon nanotube (MWCNTs) suspension in a polymeric matrix is described, the suspension being obtained by the process, and different uses of the suspension, including use for impregnation of fabrics and pre-preg products and for formation of electrically conductive coatings or coatings which have vibration damping properties of mechanical parts to which they are applied.

The present invention aims to provide an epoxy resin composition that is high in both fast curability and storage stability, a prepreg prepared by using the epoxy resin composition, and a fiber reinforced composite material prepared by curing the prepreg.

The epoxy resin composition contains the following components [A], [B], [C], and [D] and meets the following requirements [a], [b], and [c]: [A]: epoxy resin, [B]: dicyandiamide, [C]: aromatic urea, [D]: borate ester, [a]: 0.014(content of component [D]/content of component [C])0.045, [b]: 0.9(number of moles of active groups in component [A]/number of moles of active hydrogen in component [B])1.2, and [c]: 14(content of component [A]/content of component [C])25.

The present invention aims to provide an epoxy resin composition that is high in both fast curability and storage stability, a prepreg prepared by using the epoxy resin composition, and a fiber reinforced composite material prepared by curing the prepreg.

The epoxy resin composition contains the following components [A], [B], [C], and [D] and meets the following requirements [a], [b], and [c]: [A]: epoxy resin, [B]: dicyandiamide, [C]: aromatic urea, [D]: borate ester, [a]: 0.014(content of component [D]/content of component [C])0.045, [b]: 0.9(number of moles of active groups in component [A]/number of moles of active hydrogen in component [B])1.2, and [c]: 14(content of component [A]/content of component [C])25.

A process for producing polyurethane foams comprising reacting an isocyanate component with a component that is reactive to isocyanates and comprises at least one polyethercarbonate polyol, wherein the reaction is performed in the presence of a component K, wherein the component K is selected from one or more compounds of the group consisting of K1 dicarbonyl compounds of the formula (II), excluding dicarbonyl compounds that are esters of mono- or polybasic carboxylic acids, (R2)x-(CO)(R1)n-(CO)(R3)y (II), K2 -keto nitriles of the formula (III), (R5)w-(CO)C(H)(R4)(-CN)(III), K3 discarbonyl compounds having the formula (IV),

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K4 hydroxycarboxylic acids, and K5 compounds of carboxylate anion and cation. Polyurethane foams produced by the process according to the present disclosure and the use thereof.

A cyanate ester resin composition contains: a cyanate ester resin; a curing agent or a curing accelerator; silica microparticles; and core-shell rubber particles; in which the resin composition includes from 1 to 5 parts by mass of the silica microparticles and from 2 to 10 parts by mass of the core-shell rubber particles based on 100 parts by mass of the cyanate ester resin, and a mass ratio of the silica microparticles to the core-shell rubber particles is from 1/1 to 1/5.