Abstract: Provided is a curing agent that includes a curing catalyst, and an aliphatic cyclic polyolefin resin disposed on a surface of the curing catalyst. The curing catalyst includes porous polyurea particles each bearing an aluminum chelating compound, or a water-insoluble catalyst powder having a solubility of 5% by mass or less relative to water.

Abstract: Provided is a latent curing agent, including: porous particles supporting an aluminum chelate compound; and a coating film over surfaces of the porous particles, the coating film containing an aluminum chelate compound and a polymer that contains at least one of a urea bond and an urethane bond, wherein a content of an active aluminum chelate compound is 20% by mass or greater.

Abstract: A cationic curable composition that generates a silanol group by light irradiation and is cured by heat, the cationic curable composition including: a cationic curable component; porous particles holding an aluminum chelate; and a photodegradable silicon compound that generates a silanol group by photodegradation.

Abstract: Provided is a cationic curing agent including porous particles and a mixture carried on the porous particles. The mixture includes a compound represented by Formula (1) below in which R1 to R3 are identical and R1 to R6 are identical and a compound represented by Formula (1) below in which at least one of R1 to R6 is different. In Formula (1), R1 to R3 are each an optionally branched alkyl group having from 1 to 18 carbon atoms, or a phenyl group that may have a substituent, and R4 to R6 are each a hydrogen atom, an optionally branched alkyl group having from 1 to 4 carbon atoms, a halogenoalkyl group, an alkoxy group, or a phenoxy group that may have a substituent.

Abstract: A cationic curing agent includes porous particles and a compound represented by General Formula (1), where the compound is held in the porous particles. In the General Formula (1), R1 is an alkyl group having 1 to 18 carbon atoms or a phenyl group, where the alkyl group may be branched and the alkyl group and the phenyl group may each further have a substituent. R2 is a hydrogen atom, an alkyl group having 1 to 4 carbon atoms where the alkyl group may be branched, a halogenoalkyl group, an alkoxy group, or a phenoxy group; where the alkyl group, the halogenoalkyl group, the alkoxy group, or the phenoxy group may further have a substituent. R1 and R2 may be identical to or different from each other.

Abstract: Provided is a latent curing agent, including: porous particles supporting an aluminum chelate compound; and a coating film over surfaces of the porous particles, the coating film containing an aluminum chelate compound and a polymer that contains at least one of a urea bond and an urethane bond, wherein a content of an active aluminum chelate compound is 20% by mass or greater.

Abstract: A cationic curable composition that generates a silanol group by light irradiation and is cured by heat, the cationic curable composition including: a cationic curable component; porous particles holding an aluminum chelate; and a photodegradable silicon compound that generates a silanol group by photodegradation.

Abstract: Provided is a latent curing agent, including: porous particles formed of a polyurea resin and supporting an aluminum chelate and an aryl silanol compound; and a coating film over the surface of the porous particles, the coating film being formed of a cured product of an alicyclic epoxy resin.

Abstract: Provided is a thermosetting epoxy resin composition, including: an epoxy resin; a latent curing agent which is porous particles formed of a polyurea resin and supporting an aluminum chelate; and boric acid.

Abstract: An aluminum-chelate-based latent curing agent is capable of showing excellent solvent resistance and excellent storage stability at room temperature without impairing low temperature rapid curability of resin composition, when preparing one-pack type thermosetting epoxy resin composition by blending aluminum-chelate-based latent curing agent holding aluminum-chelating agent on porous resin particles obtained by subjecting polyfunctional isocyanate compound to interfacial polymerization into alicyclic epoxy resin showing extremely high cationic polymerizability. Aluminum-chelate-based latent curing agent for curing thermosetting epoxy resin is configured such that aluminum-chelating agent is held on porous resin obtained by subjecting polyfunctional isocyanate compound to interfacial polymerization, and that surface activity inhibition treatment is performed by epoxy-alkoxy-silane coupling agent.

Abstract: Provided is a thermosetting epoxy resin composition, including: an epoxy resin; a latent curing agent which is porous particles formed of a polyurea resin and supporting an aluminum chelate; and boric acid.

Abstract: where R1 is a C1-18 alkyl group, a C1-18 halogenated alkyl group, or a phenyl group that may include a substituent, R2 is a C1-18 alkyl group, a C1-18 halogenated alkyl group, a C1-18 alkoxy group, or a phenyl group that may include a substituent, where R1 and R2 may be linked together to form a ring, Y is a halogen atom, a C1-18 alkyl group, a C1-18 halogenated alkyl group, or a phenyl group that may include a substituent, m is an integer of 0 to 5, where Ys may be identical or different when m is 2 or more, and n is an integer of 1 to 3.

Abstract: Provided is a latent curing agent, including: porous particles formed of a polyurea resin and supporting an aluminum chelate and an aryl silanol compound; and a coating film over the surface of the porous particles, the coating film being formed of a cured product of an alicyclic epoxy resin.

Abstract: An aluminum-chelate-based latent curing agent is capable of showing excellent solvent resistance and excellent storage stability at room temperature without impairing low temperature rapid curability of resin composition, when preparing one-pack type thermosetting epoxy resin composition by blending aluminum-chelate-based latent curing agent holding aluminum-chelating agent on porous resin particles obtained by subjecting polyfunctional isocyanate compound to interfacial polymerization into alicyclic epoxy resin showing extremely high cationic polymerizability. Aluminum-chelate-based latent curing agent for curing thermosetting epoxy resin is configured such that aluminum-chelating agent is held on porous resin obtained by subjecting polyfunctional isocyanate compound to interfacial polymerization, and that surface activity inhibition treatment is performed by epoxy-alkoxy-silane coupling agent.

Abstract: An aluminum chelate-based latent curing agent for curing a thermosetting epoxy resin, in which an aluminum chelate-based curing agent is held in a porous resin obtained by, at the same time, subjecting a polyfunctional isocyanate compound to interfacial polymerization and subjecting a radical polymerizable compound to radical polymerization in the presence of a radical polymerization initiator, and the surface of the aluminum chelate-based latent curing agent has been subjected to inactivation treatment with an alkoxysilane coupling agent. An alkylalkoxysilane is preferred as the alkoxysilane coupling agent. The radical polymerizable compound preferably contains a polyfunctional radical polymerizable compound.

Abstract: An aluminum chelate-based latent curing agent for curing a thermosetting epoxy resin, in which an aluminum chelate-based curing agent is held in a porous resin obtained by, at the same time, subjecting a polyfunctional isocyanate compound to interfacial polymerization and subjecting a radical polymerizable compound to radical polymerization in the presence of a radical polymerization initiator, and the surface of the aluminum chelate-based latent curing agent has been subjected to inactivation treatment with an alkoxysilane coupling agent. An alkylalkoxysilane is preferred as the alkoxysilane coupling agent. The radical polymerizable compound preferably contains a polyfunctional radical polymerizable compound.

Abstract: A latent curing agent formed by holding an imidazole compound in porous resin particles is produced by emulsifying an oil phase obtained by dissolving a polyfunctional isocyanate compound in an organic solvent in an amount of 1.5 to 5 times by mass the amount of polyfunctional isocyanate compound in an aqueous phase obtained by dissolving a water-soluble polypeptide and a surfactant in water, then subjecting the emulsion to interfacial polymerization, adding a proteolytic enzyme to carry out an enzyme degradation treatment, then recovering the porous resin particles, and making an imidazole compound solution permeate into the recovered porous resin particles.

Abstract: A method for measuring a dynamic viscoelasticity of a particulate material uses, as a sample to be subjected to the dynamic viscoelasticity measurement, a sheet-shaped test piece in which the particulate material to be measured is attached to an adhesion layer formed on a heat-resistant sheet base material. With regard to the measurement conditions of the dynamic viscoelasticity measurement, the measurement temperature is within a predetermined temperature range of from ?150 to 300° C., the heating rate is a constant rate ranging from 0.01 to 100° C./minute, the measurement frequency is a constant frequency ranging from 0.01 to 100 Hz, and a sine wave control tensile mode is employed. When the particulate material is attached to the adhesion layer, the particulate material crushed in advance is sprinkled on one side of the adhesion layer and then the particulate material-sprinkled surface is squeegeed and/or air-blown.

Abstract: A latent curing agent that can cure a thermosetting epoxy resin in a relatively short period of time and at a relatively low temperature has a structure in which an aluminum chelating agent is held by a porous resin carrier obtained through interfacial polymerization of a polyfunctional isocyanate compound. The aluminum chelating agent is preferably a complex compound comprising ?-ketoenolate anion ligands coordinated to aluminum. The latent curing agent can be produced by dissolving the aluminum chelating agent and the polyfunctional isocyanate compound in a volatile organic solvent, adding the resulting solution to an aqueous phase containing a dispersing agent, and stirring the resulting mixture to cause interfacial polymerization of the isocyanate compound while the mixture is being heated.

Abstract: An aluminum chelate-based latent curing agent having excellent latency and thermal response includes a latent curing agent in which an aluminum chelating agent is retained in a porous resin obtained by interfacial polymerization of a polyfunctional isocyanate compound, and an enzyme-treated gelatin film coating such latent curing agent. This microcapsule-type latent curing agent can be produced by dissolving an aluminum chelating agent and a polyfunctional isocyanate compound in a volatile organic solvent, charging the obtained solution into a gelatin-containing aqueous phase, carrying out interfacial polymerization by heating and stirring, and subjecting the gelatin to an enzyme treatment by adding an enzyme to the obtained polymerization reaction mixture.