摘要:
An ultraviolet-curable composition of the present invention includes epoxy(meth)acrylate, urethane(meth)acrylate, and a silicone compound represented by formula (1): (CH3)3Si—O—X—O—Si(CH3)3 (1) wherein X represents a group having a structure in which n structural units represented by formula (2): wherein R1 represents an alkylene group of 1 to 18 carbon atoms, and a divalent group connected with one, or two or more groups selected from divalent groups having a structure in which plural alkylene groups of 2 to 18 carbon atoms are connected through an ether bond, R1 may be bonded directly to Si or bonded through an oxygen atom to Si, and R2 represents a hydrogen atom or a methyl group, and m structural unit represented by formula (3): are connected in a random or blocked shape, provided that n is an integer within a range from 1 to 15 and n/m is within a range from 1/5 to 1/20.
摘要:
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.
摘要:
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.
摘要:
An object is to provide a technique of imparting durability which is equal to that of existing types of DVD-5 and DVD-10 as well as DVD-9 using gold or a silicon based compound as a semitransparent film, to a DVD obtained by bonding two substrates having information recording layers, respectively, on each outermost layer of which a thin film of silver or an alloy composed primarily of silver is formed. Using an optical disc wherein ratios of error rates before and after an environmental test at 80° C. and 85% RH for 96 hours is 10 or less, and an ultraviolet curable composition for optical disc wherein a water absorption rate of the cured coating film is 2.0 wt % or less and a water-vapor permeability at a film thickness of 50 &mgr;m is 70 g/m2·day or less, the object described above is achieved.
摘要翻译:本发明的目的是提供一种将现有类型的DVD-5和DVD-10以及使用金或硅基化合物作为半透明膜的DVD-9的耐久性赋予通过粘合获得的DVD的技术 在每个最外层上分别形成有银或主要由银构成的合金薄膜的信息记录层的两个基板。 使用其中在80℃和85%RH环境试验之前和之后96小时的误差比率为10以下的光盘,以及用于光盘的紫外线固化性组合物,其中固化涂膜的吸水率 为2.0重量%以下,膜厚50μm时的水蒸气透过率为70g / m 2·天以下,达到上述目的。
摘要:
In order to provide an adhesive composition which can bond a substrate having a reflecting layer made of a silicon compound to which adhesion of conventional ultraviolet curable compositions is insufficient, an ultraviolet curable composition is provided which comprises: a silane coupling agent containing an epoxysilane or a (meth)acrylsilane; an ultraviolet curable compound; and a photopolymerization initiator.