Abstract: An object of the present invention is to provide a damping and soundproofing member not only excellent in an excellent damping and soundproofing effect but also excellent in easiness of forming thereof, especially capable of forming directly a damping and soundproofing layer on a substance to be adhered and further excellent in lightness, washing ability, durability, and the like. The invention relates to a structure formed by laminating cured product layers formed from plurality of fluid resin compositions on a substrate expecting a damping or soundproofing effect, wherein at least two cured product layers of the above cured product layers are different in hardness. Moreover, preferably, no part of the hardest layer in the above cured product layers is directly formed on the substrate and the hardest layer is formed on the substrate via an intermediate layer.

Abstract: An object of the present invention is to provide a damping and soundproofing member not only excellent in an excellent damping and soundproofing effect but also excellent in easiness of forming thereof, especially capable of forming directly a damping and soundproofing layer on a substance to be adhered and further excellent in lightness, washing ability, durability, and the like. The invention relates to a structure formed by laminating cured product layers formed from plurality of fluid resin compositions on a substrate expecting a damping or soundproofing effect, wherein at least two cured product layers of the above cured product layers are different in hardness. Moreover, preferably, no part of the hardest layer in the above cured product layers is directly formed on the substrate and the hardest layer is formed on the substrate via an intermediate layer.

Abstract: A photocurable composition comprising (A) an &agr;-cyanoacrylate and (B) a metallocene compound comprising a transition metal of Group VIII of the periodic table and aromatic electron system ligands selected from &pgr;-arenes, indenyl, &eegr;-cyclopentadienyl. The photocurable composition may further comprise (C) a cleavage-type photoinitiator. The photocurability of the photocurable composition can be greatly improved by incorporating a cleavage type photoinitiator into the composition. Even when the composition contains a radical-polymerizable compound such as an acrylic compound, it can be rapidly cured due to the cleavage type photoinitiator contained therein. In the case where the cleavage-type photoinitiator used is a peroxide, heating can also be used to cure the composition. In the case where the cleavage type photoinitiator used is an azo compound, the composition can be foamed by regulating the addition amount of the photoinitiator or the quantity of light with which the composition is irradiated.

Abstract: A method of bonding an artificial nail to a nail with a photocurable cyanoacrylate adhesive or of decorating an artificial nail or a nail using the adhesive. The adhesive comprises (A) an cyanoacrylate monomer, (B) a catalyst selected from the group consisting of a metallocene compound comprising a transition metal of Group VIII of the periodic table and aromatic electron system ligands, and a mixed catalyst consisting of a combination of a cleavage-type photoinitiator and a metallocene compound comprising a transition metal of Group VIII of the periodic table and aromatic electron system ligands, an acetylacetonatoplatinum(II) complex, and a specific metal complex which releases a nucleophilic agent upon light irradiation.

Abstract: A two-stage type optical isolator comprising two isolator units connected in series, each isolator unit having a combination of a Faraday rotator, a permanent magnet and polarizers on both sides of the Faraday rotator, the two Faraday rotators and polarizers of the units having incidence/exit surfaces having directions of normals inclined relative to the direction of optical axis, and wherein an optical axis of the incident light is aligned with an optical axis of the exit light.