Abstract:
The invention relates to coated products containing a substrate (S) provided with a coating consisting of a single high refractive index and scratch-resistant layer (A) or provided with a multilayer structure in which layers (A) alternate with lower refractive index layers (B), wherein the layers (A) are characterised in that they contain particularly finely divided TiO2 nanoparticles.
Abstract:
A radiation-curable composition capable of giving a cured product which has excellent transparency, mechanical strength and an excellent balance between surface hardness and resistance to deformation by heat/humidity; the cured product; and a multilayer structure which has a layer of the cured product and is suitable for use as an optical recording medium, etc, are provided A radiation-curable composition which comprises a monomer having a radiation-curable group and gives a cured product having the following properties: (1) when the cured product has a thickness of 100±5 μm, the cured product has a light transmittance at a wavelength of 550 nm of 80% or higher; (2) a multilayer structure where a layer of the cured product having a thickness of 100±5 μm is formed on a poly(ethylene terephthalate) film having a thickness of 100±5 μm, has a surface hardness of HB or higher; and (3) when a multilayer structure where the cured product having a thickness of 100±5 μm is formed on a disk made of a polycarbonate having a diameter of 130 mm and a thickness of 1.2±0.2 mm, is placed in an environment of 80° C. and 85% RH for 100 hours, then an absolute value |a| of an amount of warpage, a (mm), on the circumference of the multilayer structure is 0.5 mm or less.
Abstract:
An optical storage medium is provided. The optical storage medium may include a data layer and a curable hard coat layer secured to the surface of the data layer. The data layer may be read, written to, or both read and written to using a laser having a wavelength of less than about 650 nanometers. A method for securing a curable hard coat layer directly to a data layer and curing the hard coat layer is provided.
Abstract:
The object of the present invention is to provide an optical information recording medium which has tolerance to warping. To achieve the object above, an optical information recording medium 100 of the present invention includes at least one information recording layer 103 on a main surface of a substrate 101 and a light-transmitting layer 106. The substrate 101 includes a clamp area 105 and an information recording area 104 in accordance with the information recording layer 103. In the light-transmitting layer 106, the average thickness of a second area 106b corresponding to the clamp area 105 is thinner than the average thickness of a first area 106a corresponding to the information recording area 104.
Abstract:
The present invention provides an optical information medium that is less susceptible to warp in the disk surface while offering significantly high scratch resistance and abrasion resistance, and a method for producing the optical information medium. An optical information medium (1) comprising a supporting substrate (2) and a film element, the film element disposed on the supporting substrate (2) and composed of one or more layers including at least a recording layer (5) or a reflective layer (3), wherein at least one of the supporting substrate-side surface and the film element-side surface is formed of a hard coat layer (9) of a cured product of a composition comprising (A) inorganic fine particles with an average particle size of 100 nm or less, (B) a reactive silicone, and (C) an active energy ray-curable compound.
Abstract:
An optical information medium which has excellent abrasion resistance and which further exhibits sufficient smudge-proof properties is provided. The optical information medium is coated on at least one surface with a film of a silane coupling agent containing a water- or oil-repellent substituent, said silane coupling agent being represented by the following formula (1): R1nullSi(X)(Y)(Z) wherein R1 is the water- or oil-repellent substituent; X, Y and Z are independently a monovalent group; and at least one of X, Y and Z is a group which is capable of forming SinullOnullSi bond by polycondensation with silanol group; and said medium has an underlying layer formed in contact with said silane coupling agent film, and at least the surface of said underlying layer comprises a compound having a chemical bond represented by the formula (2): M-A wherein M is a metal atom (including a semimetal), and A is a chalcogen atom selected from O, S, Se, and Te, nitrogen atom, or carbon atom.
Abstract:
The present invention relates to a composition comprising a first monomer having the formula CH2═CHCOOR1, where R1 is a linear alkyl group having from 9 to 16 carbon atoms or a branched alkyl group having from 9 to 30 carbon atoms, and whose homopolymer has a Tg less than 0° C.; and/or a second monomer having the formula CH2═CHCOOR2, where R2 is an alkyl group having at least 9 carbon atoms whose homopolymer has a Tg greater than 15° C.; and a third component which may be another monomer, a polymer, surface-modified particles, or combinations thereof as well as article comprising the composition.
Abstract:
The present invention relates to a printable optical recording medium comprising: a transparent substrate; and at least a recording layer, a reflective layer and a protective layer, a reflective layer or a protective layer and an ink-receiving layer, which layers are in order superposed on said transparent substrate;said protective layer or said ink-receiving layer:(a) containing a hydrophilic and water-insoluble filler having a Mohs hardness of not more than 3;(b) having an arithmetic mean surface roughness Ra on the surface thereof of 0.3 to 2.0 .mu.m; and(c) having a "b" value of the surface thereof of +5 to -5 in Lab color space as a chromaticity.Such printable optical recording medium has a good surface printability and a high whiteness on a printing surface thereof, and is a high chroma of images printed thereon.
Abstract:
A composition for use in refinishing optical discs comprises a mixture of volatile organic solvents having solubility parameters within a defined range, a chemically reactive nonvolatile binder, insoluble particulate material for polishing, and an immiscible phase forming an emulsion with the other components, thereby holding the particulate matter in suspension. Anionic surfactants are added to improve wetting, along with a conventional wetting agent. The mixture of solvents promotes reflow of the disc surface, while the binder fills in deformations and provides a permanent protective coating.
Abstract:
Flexible digital optical media, such as optical tapes, are provided with an aqueous-applied backing layer which provides excellent performance with regard to runnability, scratch resistance, abrasion resistance, frictional properties and curl characteristics. The backing layer comprises a film-forming water-dispersible polymeric binder and water-dispersible static-dissipative filler particles and a water-dispersible lubricant is either incorporated within the backing layer or forms a thin film over the surface of the backing layer.