Abstract: An object of the present invention is to provide a composition for a fiber-reinforced composite material, the composition being capable of forming the fiber-reinforced composite material excellent in work stability, high in curing speed and high in heat resistance, and particularly suitable for production of a continuous fiber-reinforced composite material by a pultrusion method.

Abstract: Provided is a sheet-shaped mold possessing a high strength and having a low breakage rate in demolding even in a case where the mold is thin and has a large-area. The sheet-shaped mold is prepared by combining a cured silicone rubber containing a polyorganosiloxane and a fiber for reinforcing the cured silicone rubber. The fiber may comprise a cellulose nanofiber. The sheet-shaped mold may have an uneven pattern on at least one surface (or side) thereof. The fiber may be surface-treated with a hydrophobizing agent. The fiber may forma nonwoven fabric, and the nonwoven fabric may be impregnated with the cured silicone rubber. The cured silicone rubber may comprise a two-component curable silicone rubber having a polydimethylsiloxane unit. The sheet-shaped mold may be a mold for nanoimprint lithography using a photo-curable resin.

Abstract: Provided is a method for producing a microstructure that enables continuous transfer with good mold releasability even without subjecting the mold to a surface release treatment. The method for producing a microstructure according to the present invention includes preparing a mold having a relief-patterned surface. A substrate is separately prepared. A liquid photocurable transferable material layer is formed and sandwiched between the substrate and the mold to be shaped. The shaped transferable material layer is exposed to be converted into a photocured layer. The photocured layer is demolded from the mold to give the microstructure. The mold is prepared from a siloxane-bond-containing polymeric organic compound. The transferable material layer is formed from a photocurable composition including a cationically polymerizable compound (A) and a photoacid generator (B).

Abstract: Provided is a photosensitive composition for volume hologram recording layer formation. The photosensitive composition gives a volume hologram recording layer that has excellent moisture resistance and thermal stability, less undergoes cure shrinkage upon hologram recording, and offers excellent multiple recording properties. The photosensitive composition for volume hologram recording layer formation includes components (A), (B), (C), (D), and (E). Component (A) is at least one cationically polymerizable compound including a compound represented by Formula (1). Component (B) is a compound containing an active-proton-containing functional group. Component (C) is a thermal acid generator. Component (D) is a radically polymerizable compound. Component (E) is a radical-polymerization initiator. Components (A), (B), and (C) constitute a precursor material for three-dimensional cross-linked polymer matrix.

Abstract: Provided is a photosensitive composition for volume hologram recording capable of forming a volume hologram recording medium that less shrinks upon curing in hologram recording (in hologram formation) and resists cracking. The photosensitive composition for volume hologram recording contains an alicyclic epoxy compound (A) represented by Formula (I); a thermal acid generator (B); a radically polymerizable compound (C); a radical polymerization initiator (D); and at least one epoxy compound (E) selected from the group consisting of compounds represented by Formula (1), epoxidized fatty acid esters, and epoxidized conjugated diene polymers.

Abstract: Provided is a transmission-type volume hologram recording medium for use in a two-beam hologram recording system, which has a high diffraction efficiency and is capable of significantly reducing the intensity of higher-order diffracted light, which causes a noise, than first-order diffracted light. The transmission-type volume hologram recording medium includes two facing substrates of dissimilar materials and, held between them, a volume hologram recording layer of a volume hologram recording photosensitive composition. The substrates holding the volume hologram recording layer therebetween preferably have transparency in the visible light region and have thicknesses each from 2 to 2000 ?m. The difference in refractive index between the two substrates holding the volume hologram recording layer therebetween is preferably from 0.001 to 0.5. The difference in thickness between the two substrates holding the volume hologram recording layer therebetween is preferably from 1 to 1500 ?m.

Abstract: A photosensitive composition (I) for volume hologram recording includes a binder polymer (A), a photo-induced cationically polymerizable compound (B), a photoinitiator (C), and a sensitizing dye (D), in which the binder polymer (A) is a polymer containing naphthalene rings and having a weight-average molecular weight of 1×104 to 100×104. A method produces a photosensitive composition (II) for volume hologram recording by mixing a binder polymer (A?), a photo-induced cationically polymerizable compound (B?), a photoinitiator (C?), and a sensitizing dye (D?), in which the photo-induced cationically polymerizable compound (B?) has been subjected to a heating treatment at a temperature equal to or lower than the boiling point of the compound (B?).