| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 428650100 | Polymer derived from material having at least one acrylic or alkacrylic group or the nitrile or amide derivative thereof (e.g., acrylamide, acrylate ester, etc.) | 16 |
| 20090148651 | Optical Disc and an Ultraviolet-Curable Resin Composition Therefor - The present invention relates to an optical disc having a cured product layer of an ultraviolet-curable resin composition containing (A) dicyclopentenyloxyethyl acrylate, (B) urethane (meth)acrylate and/or (C) epoxy (meth)acrylate, and (D) photopolymerization initiator, and a resin composition for the cured product layer thereof and a cured product therewith; and the optical disc of the present invention has less warping after curing and is excellent in transparency and durability and therefore suitable for next generation high density optical discs where recording and/or reproducing are performed using a blue laser; the resin composition for said cured product layer has less deterioration with age and less viscosity change in recycle and is suitable for a coating agent of optical discs and for efficient production of optical discs. | 06-11-2009 |
| 20090155516 | Ultraviolet-Curable Resin Composition and Use Thereof - Disclosed is an ultraviolet-curable resin composition for multilayer optical discs, which contains (A) dioxane glycol di(meth)acrylate and/or tricyclodecane dimethylol di(meth)acrylate, and (B) a photopolymerization initiator. | 06-18-2009 |
| 20090324870 | Utraviolet-curable composition for optical disk and optical disk - 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. | 12-31-2009 |
| 20100003447 | OPTICAL INFORMATION RECORDING MEDIUM - An optical information recording medium includes a recording layer that absorbs recording light in accordance with its wavelength, the recording light being condensed for information recording, and increases the temperature in the vicinity of a focus so as to form a recording mark and that has properties of increasing a light absorption amount with respect to the wavelength of the recording light by heating performed at a temperature of 120° C. or more. | 01-07-2010 |
| 20100055376 | ULTRAVIOLET-CURABLE COMPOSITION FOR OPTICAL DISC AND OPTICAL DISC - The present invention provides an ultraviolet-curable composition that inhibits deterioration of a reflective layer during environmental changes in humidity and temperature even when using silicon or a silicon compound for the light reflecting layer, and an optical disc enabling preferable reading and writing of recording signals even during environmental changes in humidity and temperature. | 03-04-2010 |
| 20100055377 | OPTICAL RECORDING MEDIUM - To provide an optical recording medium excellent in the balance of characteristics, which has a sufficient surface hardness and of which the deformation when the environmental temperature and the environmental humidity change is small. | 03-04-2010 |
| 20100075100 | ULTRAVIOLET-CURABLE COMPOSITION FOR OPTICAL DISK, AND OPTICAL DISK - An ultraviolet-curable composition for an optical disk which is used in producing the optical disk which includes a substrate and, formed thereover, at least both a light reflection layer and a light transmission layer and in which data is read using a laser beam striking from the light transmission layer side. The composition is used to form the light transmission layer. The ultraviolet-curable composition for an optical disk contains an epoxy(meth)acrylate, a (metha)acrylate having two radical-polymerizable unsaturated bonds, and a free-radical photopolymerization initiator, in which the (meth)acrylate having two radical-polymerizable unsaturated bonds contains a (meth)acrylate of a neopentyl glycol hydroxypivalate compound, the content of the (meth)acrylate of the neopentyl glycol hydroxypivalate compound is 10 to 40% by mass, and the content of the free-radical photopolymerization initiator is 1 to 4% by mass. | 03-25-2010 |
| 20100086725 | ULTRAVIOLET-CURABLE COMPOSITION FOR OPTICAL DISK INTERMEDIATE LAYER AND OPTICAL DISK - An ultraviolet-curable composition for an optical disk intermediate layer includes a urethane(meth)acrylate (a) having three or more radical-polymerizable unsaturated bonds, a (meth)acrylate (b) having four or more radical-polymerizable unsaturated bonds which is other than the urethane(meth)acrylate (a), and a monofunctional alicyclic(meth)acrylate (c), wherein a B-type viscosity of the composition at 25° C. is not more than 1,000 mPa·s. The ultraviolet-curable composition may be used for producing the intermediate layers of optical disks by using a general-purpose resin such as a polycarbonate used as a stamper. | 04-08-2010 |
| 20100129587 | COMPOSITION, CURED PRODUCT AND ARTICLE - Disclosed is a composition capable of imparting high hardness, abrasion resistance, excellent contamination resistance and durability of such contamination resistance even in the form of a thin film. Specifically disclosed is a composition including an organic polymer containing 5-30% by mass of a radically polymerizable monomer with a perfluoroalkyl group, 0.01-5% by mass of α,ω-dimercaptopolysiloxane, 5-40% by mass of a radically polymerizable monomer with a cationically photopolymerizable epoxy group and 25-75% by mass of another radically polymerizable monomer which is copolymerizable with the aforementioned substances. The organic polymer has a structure corresponding to a radically polymerized copolymer of the monomer mixture wherein the molar ratio of the mercapto group to the epoxy group is 0.0001-0.025 and/or a structure obtained by reacting a (meth)acrylic acid with the epoxy group of the radically polymerized copolymer. | 05-27-2010 |
| 20100143638 | SHEET MATERIAL FOR MULTILAYER OPTICAL RECORDING MEDIUM, MULTILAYER STRUCTURAL BODY FOR OPTICAL RECORDING MEDIUM, AND MULTILAYER OPTICAL RECORDING MEDIUM - A sheet material for a multilayer optical recording medium ( | 06-10-2010 |
| 20100173115 | ULTRAVIOLET CURABLE COMPOSITION FOR OPTICAL DISC INTERMEDIATE LAYER, OPTICAL DISC, AND METHOD FOR MANUFACTURING OPTICAL DISC - An ultraviolet curable composition comprising a polyfunctional meth)acrylate having three or more (meth)acryloyl groups per molecule, a difunctional (meth)acrylate having two (meth)acryloyl groups per molecule, and a monofunctional (meth)acrylate having one (meth)acryloyl group per molecule, wherein the content of the polyfunctional (meth)acrylate in the (meth)acrylates contained in the ultraviolet curable composition is 30 to 70% by mass, the content of the monofunctional (meth)acrylate is 5 to 30% by mass, the total content of a difunctional (meth)acrylate having an alicyclic structure and a monofunctional (meth)acrylate having an alicyclic structure is 10 to 50% by mass, and the content of a methacrylate is 7% by mass or more exhibits good separation when separated from a stamp. A resultant cured film can be separated from a stamp made of a general-purpose resin while maintaining useful characteristics such as heat resistance and the like for an intermediate layer of an optical disc. | 07-08-2010 |
| 20100279054 | RECORDABLE OPTICAL RECORDING MEDIA - A recordable optical recording media is provided with an inorganic recording layer prepared by magnetic sputtering. The recording layer is a combination film including a primary component selected from cupper (Cu), silicon (Si), chromium (Cr) or the combination thereof. The purpose of recording data can be achieved by way of altering micro-structure of the recording layer after irradiating the recordable optical recording media by a laser beam. | 11-04-2010 |
| 20110052855 | Ultraviolet-Curable Resin Composition For Optical Disk, Cured Product And Optical Disk - The present invention relates to an ultraviolet-curable resin composition for an optical disk containing a sulfur-containing compound (A) represented by the following formula (1): | 03-03-2011 |
| 20110129636 | Block Copolymer Containing a Photoactive Monomer Bearing a Photoisomerizable Group, Use Thereof in a 3D Optical Memory - The invention relates to a block copolymer comprising:
| 06-02-2011 |
| 20120094054 | HYBRID DISC, METHOD AND SYSTEM OF FORMING THE DISC - A hybrid data disc, method and system of forming the disc are disclosed. The hybrid disc includes a first substrate structure bonded to a second substrate structure, and at least two data layers of different formats for access from different sides of the disc. One example provides the second substrate structure with a second substrate that has at least one curable material layer on each side of the second substrate, and the curable material has a property that results in shrinkage associated with curing of the material. Other examples provide a data disc with different stacking ring configurations, a thinner substrate and substrate structures of opposite curvature. | 04-19-2012 |
| 20140087114 | SHEET FOR PRODUCING MULTILAYER OPTICAL RECORDING MEDIUM, MULTILAYER OPTICAL RECORDING MEDIUM, AND ADHESIVE - A sheet for producing a multilayer optical recording medium comprises optical recording layers and adhesive layers laminated on one another, wherein the adhesive layer comprises an adhesive comprising a polymer as a main component, the polymer includes fluorine-containing monomer and/or silicon-containing monomer as a constituent monomer component, the adhesive layer has no domain structure or has a domain structure with a size of of 110 nm or less, a total content of the fluorine-containing monomer and the silicon-containing monomer is 10 to 100 mass % when a monomer total amount as the constituent monomer component in the polymer is 100 mass %. According to the sheet for producing a multilayer optical recording medium, a multilayer optical recording medium can be produced which can detect reflected light having sufficient intensity from the interface between the optical recording layer and the adhesive layer and which generates less scattered light in the adhesive layer and causes less noise. | 03-27-2014 |
