Sony Chemicals Corporation

Sony Corporation

Sony Chemical & Information Device Corporation

Sony Corporation & Information Device Corporation

Natsuo Uchiyama

Tadasu Kawashima

Masahiko Ito

Katsuhiko Komuro

Daisuke Masuko

Isoji Sakurada

A latent epoxy resin curing agent is provided which can be manufactured without using an amphiphilic polymer compound requiring a painful trial and error selection process, exhibits excellent solvent resistance and low-temperature fast-curing ability, and contains an imidazole-based compound as a main component. In the latent epoxy resin curing agent containing the imidazole-based compound as a main component, the adduct particles of the epoxy-based compound and the imidazole-based compound are coated with an ethyl cellulose film, and the surface thereof is crosslinked with a polyfunctional isocyanate compound. The epoxy-based compound, the imidazole-based compound, and ethyl cellulose are dissolved in a predetermined saturated hydrocarbon-based solvent under stirring and heating. Then, the epoxy-based compound and the imidazole-based compound are subjected to adduct reaction to obtain a slurry of the adduct. After the slurry was cooled, the polyfunctional isocyanate compound is added thereto to crosslink the ethyl cellulose film.

Latent curing agent for epoxy resin and method for manufacturing the same

A latent epoxy resin curing agent is provided which exhibits excellent solvent resistance and low-temperature fast-curing ability, and contains an imidazole-based compound as a main component. In the latent epoxy resin curing agent containing the imidazole-based compound as a main component, adduct particles formed through adduct reaction of an epoxy-based compound with the particulate imidazole-based compound are coated with an ethyl cellulose film. Furthermore, the surfaces of the adduct particles may be crosslinked with a polyfunctional isocyanate compound. A mixture of the epoxy-based compound, the particulate imidazole-based compound, and ethyl cellulose in a predetermined saturated hydrocarbon-based solvent is heated under stirring. Then, the epoxy-based compound and the particulate imidazole-based compound are subjected to adduct reaction to give a slurry of the adduct. After the slurry is cooled, the latent epoxy resin curing agent is filtrated.

An aluminum chelate-based latent curing agent capable of curing a thermosetting epoxy resin under the condition of relatively low temperature in a short period of time is provided. Furthermore, a method for manufacturing the latent curing agent is provided, in which the curing conditions of the aluminum chelate-based latent curing agent can be controlled relatively easily. The aluminum chelate-based latent curing agent is prepared by reacting an aluminum chelate agent with a silsesquioxane type oxetane derivative in the presence of a water insoluble or poorly water-soluble cellulose ether, whereby latency properties are imparted thereto. This latent curing agent contains a coating layer composed of the water insoluble or poorly water-soluble cellulose ether. Preferably, the surface is treated with an isocyanate compound.

Latent curing agent

A printing medium is manufactured by forming a primer layer and an adhesive layer successively on the rubbed surface of a base film and wound into a roll When the printing medium is delivered from roll adhesive layer does not remain on the roll side even if adhesive layer has a low adhesive power because the adhesion between adhesive layer and primer layer is strong while the adhesion between adhesive layer and base film in roll is weak. The printing medium can be run in a printer without using a release film because adhesive layer has a low adhesive power.

Printing media

Pressure-sensitive adhesive tape and process for producing the same

It is an object of the present invention to provide a highly durable photochromic film retaining a photochromic activity for a long time even when used under high temperture and high humidity conditions. A durable photochromic film comprising a coloring material layer containing a photochromic material and a phototransmissive deposition film laminated to said coloring material layer is disclosed.

Photochromic film comprising a gas barrier deposition film

Double-faced pressure-sensitive adhesive tapes

An electrode, or grounding pad for contact with a living body comprises a conductive substrate of a textile having conductive fibers, a conductive adhesive layer containing carbon fibers for contacting the surface of the living body and being affixed to the conductive substrate, and an electrical connection to the conductive substrate.

Growing community of inventors

Tochigi, Japan

Tadasu Kawashima