Abstract: With branched epoxy(meth)acrylate which comprises a phenyl skeleton serving as a stiff molecular skeleton, and which comprises in the molecular skeleton a number of branched structures capable of forming a coating structure at a high crosslinking density after ultraviolet curing, it becomes possible to design the coating hardness to be high even if the content of an acryloyl group is designed to be low to effect less crosslinking reaction induced by ultraviolet curing, and it becomes possible to relax distortions inside a cured film due to cure shrinkage which occurs at the time of ultraviolet curing. As a result, there can be realized an ultraviolet-curable composition for an optical disk which has a high elastic modulus and is less tilted at the time of curing even if the coating hardness is designed to be high.

Abstract: An object is to provide a nonaqueous electrolyte and a nonaqueous-electrolyte secondary battery which have excellent discharge load characteristics and are excellent in high-temperature storability, cycle characteristics, high capacity, continuous-charge characteristics, storability, gas evolution inhibition during continuous charge, high-current-density charge/discharge characteristics, discharge load characteristics, etc. The object has been accomplished with a nonaqueous electrolyte which comprises: a monofluorophosphate and/or a difluorophosphate; and further a compound having a specific chemical structure or specific properties.

Abstract: An object of the present invention is to provide a radiation-curable coating material which forms a cured coating film having high hardness and low curing shrinkage, a radiation-curable resin composition for obtaining the radiation-curable coating material, and a method for forming a protective layer using the radiation-curable coating material.

Abstract: A subject is to provide a nonaqueous electrolyte excellent in cycle performances such as capacity retention after cycling, output after cycling, discharge capacity after cycling, and cycle discharge capacity ratio, output characteristics, high-temperature storability, low-temperature discharge characteristics, heavy-current discharge characteristics, high-temperature storability, safety, high capacity, high output, high-current-density cycle performances, compatibility of these performances, etc. Another subject is to provide a nonaqueous-electrolyte secondary battery employing the nonaqueous electrolyte. The subjects have been accomplished with a nonaqueous electrolyte which contains a monofluorophosphate and/or a difluorophosphate and further contains a compound having a specific chemical structure or specific properties.

Abstract: An ultraviolet-curable composition of the present invention, which is used for a light transmission layer of an optical disk, includes a urethane (meth)acrylate having an isocyanate structure; and at least one of a monofunctional (meth)acrylate and a difunctional (meth)acrylate, wherein the combined amount of the urethane (meth)acrylate, the monofunctional (meth)acrylate and the difunctional (meth)acrylate is at least 90% by mass of the ultraviolet-curable composition. This ultraviolet-curable composition for a light transmission layer is able to realize an optical disk that exhibits excellent durability even under conditions of high temperature and high humidity, minimal decrease in light reflectance, and excellent adhesion between layers.

Abstract: The present invention relates to a radiation curable resin composition which comprises epoxy (meth)acrylate, a monofunctional (meth)acrylate, a bifunctional (meth)acrylate having a specific structure, and a bifunctional (meth)acrylate obtained from an aliphatic dihydric alcohol having an oxyalkylene structure and (meth)acrylic acid and further contains a thermoplastic resin, thereby causing satisfactory adhesion to plastic substrates, sufficient shape retention, and excellent shape recovery properties, and satisfaction in moldability including casting efficiency and shape reproducibility, as well as a high refractive index and appropriateness for use as a lens sheet.

Abstract: By using an ultraviolet-curable composition, which contains a specific ultraviolet-curable compound obtained by modifying a bisphenol epoxy compound with a polyester having a flexible structure, as a light transmission layer. Accordingly, the present invention achieves an optical disk having excellent characteristics such as excellent durability, excellent light resistance and excellently reduced warp, while suppressing deterioration of the light reflection film due to environment of high temperature and high humidity or light exposure. Consequently the ultraviolet-curable composition of the present invention is most suitable for optical disks having a thick light-transmitting layer on which recording/reproduction is performed by using a blue laser.

Abstract: A radiation-curable resin composition for shape-replication of the present invention includes a polyester resin (R) whose number average molecular weight (Mn) is 1,000 to 8,000; and a polymerizable vinyl compound (V), wherein a temperature (T4), at which a complex viscosity (?*) of components excluding any solvent at a frequency of 1 Hz is 1×104 dPa·s, is 30° C. or higher, and a temperature (T6), at which a complex viscosity (?*) at a frequency of 1 Hz is 1×106 dPa·s, is 100° C. or lower.

Abstract: The present invention relates to a radiation curable resin composition which comprises epoxy (meth)acrylate, a monofunctional (meth)acrylate, a bifunctional (meth)acrylate having a specific structure, and a bifunctional (meth)acrylate obtained from an aliphatic dihydric alcohol having an oxyalkylene structure and (meth)acrylic acid and further contains a thermoplastic resin, thereby causing satisfactory adhesion to plastic substrates, sufficient shape retention, and excellent shape recovery properties, and satisfaction in moldability including casting efficiency and shape reproducibility, as well as a high refractive index and appropriateness for use as a lens sheet.

Abstract: A radiation curable resin composition for a Fresnel lens is provided, which exhibits a high elastic modulus and a high refractive index and is superior in adhesion to the plastic substrate and is superior in transparency. A lens layer exhibits excellent shape retention over a wide temperature range and is less likely to chip and crack due to an external force. A Fresnel lens sheet using the radiation curable resin composition is also provided. The resin composition comprises, as an essential component, an epoxy (meth)acrylate (a) having an epoxy equivalent per weight of 450 g/eq or more, which has a cyclic structure and two or more (meth)acryloyl groups; a specific trifunctional (meth)acrylate (b); a (meth)acrylate (c) having a molecular weight of 700 or less from an aliphatic polyhydric alcohol having an oxypropylene structure; and a monofunctional (meth)acrylate (d) having a cyclic structure.

Abstract: An object of the present invention is to provide a photosensitive resin composition or a photosensitive resist for color filters which is superior in heat resistance, water resistance, solvent resistance, chemical resistance, and also transparency, and a method for producing color filters using them. The present invention relates to a photosensitive resin composition comprising a vinyl polymer (A) having at least one cyclocarbonate group and at least one carboxyl group in the molecule and a compound (B) having at least two ethylenically unsaturated double bonds in the molecule as a main component, which can introduce crosslinked structures by photocuring and thermosetting, a photosensitive resist for color filters comprising the photosensitive resin composition and a colorant, and a method for producing a color filter, using the photosensitive resist for color filters.

Abstract: A radiation curable resin composition for a Fresnel lens is provided, which exhibits a high elastic modulus and a high refractive index and is superior in adhesion to the plastic substrate and is superior in transparency. A lens layer exhibits excellent shape retention over a wide temperature range and is less likely to chip and crack due to an external force. A Fresnel lens sheet using the radiation curable resin composition is also provided. The resin composition comprises, as an essential component, an epoxy (meth)acrylate (a) having an epoxy equivalent per weight of 450 g/eq or more, which has a cyclic structure and two or more (meth)acryloyl groups; a specific trifunctional (meth)acrylate (b); a (meth)acrylate (c) having a molecular weight of 700 or less from an aliphatic polyhydric alcohol having an oxypropylene structure; and a monofunctional (meth)acrylate (d) having a cyclic structure.

Abstract: An object is to provide a color filter which is capable of forming a pattern using an alkaline developer and has excellent heat resistance, solvent resistance and chemical resistance, and is also suitable for practical use. The color filter comprises a transparent substrate and a pixel formed on the transparent substrate, wherein the pixel is made of a coating film of a curable colored composition containing (a) a coloring material, (b) a compound having a photopolymerizable functional group and (c) an amino resin having a carboxyl group and/or a phenolic hydroxyl group and the coating layer is photocured, followed by heat curing.