Abstract: Provided is a curable resin composition which exhibits excellent curability and is good in storage stability. The curable resin composition comprises (a) a polymer having a hydrolyzable silyl group, (b) an acid catalyst, and (c) an onium salt represented by the following general formula (1): C+A???(1) wherein C+ is an onium cation, and A? is a hydrogen sulfate anion, a hydrogen sulfite anion, a sulfonate anion represented by R1SO3? wherein R1 represents an alkyl group, perfluoroalkyl group, cycloalkyl group, vinyl group, aryl group, perfluoroaryl group, aralkyl group or halogen atom; or a bis(substituted sulfonyl)imide anion represented by (R2SO2)2N? wherein R2 represents an alkyl group, perfluoroalkyl group, or aryl group; tetrafluoroborate anion, or hexafluorophosphate anion.

Abstract: Provided is an adhesive composition which is flexible, and exhibits excellent adhesion durability. The adhesive composition comprises (a) a 2-cyanoacrylic acid ester, (b) a polymer having a hydrolyzable silyl group, (c) an elastomer, and (d) an acid catalyst, in which the contents of the components (b), (c), and (d) are from 5 to 200 parts by mass, from 5 to 50 parts by mass, and from 0.0005 to 0.5 parts by mass, respectively, relative to 100 parts by mass of the component (a). Further preferably, the composition contains 0.001 to 5 parts by mass of (e) an onium salt relative to 100 parts by mass of the component (a).

Abstract: A 2-cyanoacrylate-based adhesive composition includes a 2-cyanoacrylic acid ester (a) and an onium salt (b) represented by general formula C+A?. In the formula, C+ is an onium cation, and A? is a hydrogen sulfate anion, bisulfite anion, sulfonate anion represented by R1SO3? (where R1 is an alkyl group, perfluoroalkyl group having 3 to 10 carbon atoms, cycloalkyl group, vinyl group, aryl group, perfluoroaryl group, aralkyl group, or halogen atom), or bis(substituted sulfonyl)imide anion represented by (R2SO2)2N? (where R2 is an alkyl group, perfluoroalkyl group, or aryl group).) The 2-cyanoacrylate-based adhesive composition has good storage stability and has an excellent adhesion rate to metals and thermoplastic elastomers.

Abstract: Provided is an adhesive composition which can form a cured product that is high in shear adhesion strength, peel adhesion strength and impact adhesion strength and particularly is excellent in cold/hot cycle resistance of adhesion strength. The adhesive composition comprises (a) a 2-cyanoacrylic acid ester, (b) a high molecular-weight component compatible with 2-cyanoacrylic acid ester, (c) a multifunctional 2-cyano-3-vinylacrylic acid ester, and (d) an onium salt represented by the following general formula (1): C+A???(1) wherein, C+ represents an onium cation and A? represents an anion which does not substantially initiate polymerization of the 2-cyanoacrylic acid ester, and the components (a)-(d) are contained in predetermined amounts.

Abstract: The present invention provides a latent fingerprint detection, method that is to handle and is capable of clearly detecting a latent fingerprint, and a heating evaporation device for detecting a latent fingerprint and a latent fingerprint detection apparatus which are capable of detecting a clear latent fingerprint by a one-time operation by heating a chemical agent at high temperatures in a short time, as well as a composition for detecting a latent fingerprint. This latent fingerprint detection method includes a heating step of heating a chemical agent to be gasified by heating so as to attach to a latent fingerprint on a specimen, and an exposure step of exposing the specimen having the latent fingerprint attached thereto to the atmosphere of the gasified chemical agent. The chemical agent is a mixture of a 2-cyanoacrylic acid ester polymer and a dye.

Abstract: A 2-cyanoacrylate-based adhesive composition includes a 2-cyanoacrylic acid ester (a) and an onium salt (b) represented by general formula C+A?. In the formula, C+ is an onium cation, and A? is a hydrogen sulfate anion, bisulfite anion, sulfonate anion represented by R1SO3? (where R1 is an alkyl group, perfluoroalkyl group having 3 to 10 carbon atoms, cycloalkyl group, vinyl group, aryl group, perfluoroaryl group, aralkyl group, or halogen atom), or bis(substituted sulfonyl)imide anion represented by (R2SO2)2N? (where R2 is an alkyl group, perfluoroalkyl group, or aryl group).) The 2-cyanoacrylate-based adhesive composition has good storage stability and has an excellent adhesion rate to metals and thermoplastic elastomers.

Abstract: A 2-cyanoacrylate-based composition comprises a coloring material that changes color with curing of 2-cyanoacrylate. The composition has good visibility and excellent workability as it is colored before curing, and changes color with curing as it becomes colorless or light-colored after curing, thereby providing bonded, filled or surface treated portions with good appearance.

Abstract: A 2-cyanoacrylate-based composition comprises a coloring material that changes color with curing of 2-cyanoacrylate. The composition has good visibility and excellent workability as it is colored before curing, and changes color with curing as it becomes colorless or light-colored after curing, thereby providing bonded, filled or surface treated portions with good appearance.

Abstract: A 2-cyanoacrylate composition comprising a cyclic phenol sulfide derivative. The composition has a high curing rate and is excellent in moist-heat resistance, surface curability and clearance curability.

Abstract: A 2-cyanoacrylate composition comprising a cyclic phenol sulfide derivative. The composition has a high curing rate and is excellent in moist-heat resistance, surface curability and clearance curability.

Abstract: The present invention provides a process for producing 2-cyanoacrylic acid, characterized by subjecting a 2-cyanoacrylate and an organic acid to transesterification reaction. The 2-cyanoacrylic acid obtained by the process of the present invention is useful as a starting material for the preparation of polyfunctional 2-cyanoacrylates.