Dexerials Corporation

Sony Chemical & Information Device Corporation

Sony Corporation

Kazunobu Kamiya

Ryoji Kojima

Hiroki Shibuya

Takeshi Nishio

Makoto Yoshinari

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), Ris 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. Ris a hydrogen atom, an alkyl group having 1 to 4 carbon atoms where the alkyl group may be branched, a halogenalkyl group, an alkoxy group, or a phenoxy group; where the alkyl group, the halogenalkyl group, the alkoxy group, or the phenoxy group may further have a substituent. Rand Rmay be identical to or different from each other.

Cationic curing agent, method for producing same and cationically curable composition

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.

Latent curing agent and method for manufacturing same, composition for forming coating film, and cation-curable composition

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.

Cationically curable composition and cured product production method

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.

Latent curing agent, production method therefor, and thermosetting epoxy resin composition

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.

Thermosetting epoxy resin composition and production method for same

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.

Process for producing aluminum-chelate-based latent curing agent, and thermosetting epoxy resin composition

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.

Aluminum chelate-based latent curing agent, method of producing same, and thermosetting epoxy resin

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.

Method for producing latent curing agent

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 &#x2212;150 to 300&#xb0; C., the heating rate is a constant rate ranging from 0.01 to 100&#xb0; 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.

Method for measuring dynamic viscoelasticity of particulate material

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 &#x3b2;-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.

Latent curing agent

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.

Microcapsule-type latent curing agent

A novel aluminum chelate latent curing agent that can cure a glycidyl ether epoxy compound at a lower temperature and more quickly than an aluminum chelate latent curing agent produced by emulsification and interfacial polymerization of a polyfunctional isocyanate in the presence of both a radical polymerizable monomer, such as divinyl benzene, and a radical polymerization initiator, is micro-encapsulated in a core-shell form, wherein an aluminum chelate curing agent and a cationic polymerizable compound are included in a capsule formed from an interfacial polymerization product of a polyfunctional isocyanate.

Aluminum chelate latent curing agent

An aluminum chelate latent curing agent is configured such that an aluminum chelating agent and a specific arylsilane compound or a hydrolysate thereof are held in a polymer obtained by subjecting the aluminum chelating agent, the arylsilane compound, and a polyfunctional isocyanate compound to an emulsifying treatment, and then subjecting the polyfunctional isocyanate to interfacial polymerization. The aluminum chelating agent does not have an alkoxy group bonded to the aluminum. The arylsilane compound is a compound represented by the formula (A).(Ar)mSi(OR)n &#x2003;&#x2003;(A) In the formula (A), m is 2 or 3, and the sum of m and n is 4. Ar represents an optionally-substituted aryl group. R represents a hydrogen atom, a methyl group, or an ethyl group. When n is two, the two Rs may be the same or different.

Aluminum chelate latent curing agent and production method thereof

A thermosetting epoxy resin composition can be cured rapidly at low temperature with an aluminum chelate-based latent curing agent without the use of a cycloaliphatic epoxy compound. The thermosetting epoxy resin composition includes an aluminum chelate-based latent curing agent, a silanol compound of the formula (A), and a glycidyl ether-type epoxy resin:(Ar)Si(OH)&#x2003;&#x2003;(A)wherein Ar is an optionally substituted aryl group, and m is 2 or 3, provided that the sum of m and n is 4. Examples of the silanol compound of the formula (A) include triphenylsilanol, diphenylsilanol, and the like.

Thermosetting epoxy resin composition

An aluminum chelate latent curing agent includes an aluminum chelate curing agent, and a porous resin that holds the aluminum chelate curing agent and is obtained by subjecting a polyfunctional isocyanate compound to interfacial polymerization while simultaneously subjecting a polyfunctional radical polymerizable compound to radical polymerization in the presence of a radical polymerization initiator. In the aluminum chelate latent curing agent, a silanol compound of the formula (A) is further held in the porous resin.(Ar)Si(OH)&#x2003;&#x2003;(A)In the formula, m is 2 or 3, and the sum of m and n is 4. Ar represents an optionally-substituted aryl group.

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Tochigi, Japan

Kazunobu Kamiya