摘要:
A cyanine compound represented by the following general formula (I): wherein the ring A 1 represents benzene or naphthalene ring; the ring A 3 represents 5-membered or 6-membered ring; R 1 and R 2 each independently represent a hydrogen atom and the like; R 7 represents an alkyl group and the like; R 12 represents a substituent represented by the following general formula (II) or (II'); R 20 represents a hydrogen atom and the like; An q- represents a q-valent anion; q represents 1 or 2; p represents a coefficient to keep the charge neutral: wherein, in the general formula (II), the bond between L and T is a double, conjugated double, or triple bond; L represents a carbon atom; T represents a carbon, oxygen, sulfur, or nitrogen atom; x, y, and z represent 0 or 1; s represents a number from 0 to 4; R 13 represents a hydrogen atom and the like; R 14 , R 15 , and R 16 each independently represent a hydrogen atom and the like; in the general formula (II'), the bond between L' and T' is a double or conjugated double bond; L' represents a carbon atom; T' represents a carbon, oxygen, or nitrogen atom; s' represents a number from 0 to 4; the ring containing L' and T' represents 5-membered ring and the like which may contain a heteroatom.
摘要:
The present invention provides an ultraviolet-curable resin composition, comprising a silicone compound represented by the following formula (1): €ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ€ƒ[Chemical Formula 1] (CH 3 ) 3 Si- O-A- Si(CH 3 ) 3 €ƒ€ƒ€ƒ€ƒ€ƒ(1) (wherein A represents a group in which n structural units represented by a chemical formula (2) and m structural units represented by a chemical formula (3) are bonded in a random form or block form, n is an integer ranging from 1 to 15, n/m is 1/5 to 1/20, and structural units represented by the chemical formulas (2) and (3) are not bonded to either themselves or other structural parts an oxygen-oxygen bond in a molecule) and a photocurable compound that reacts with the silicone compound. The present invention also provides an optical information recording medium having a surface protective layer with an excellent spot prevention function and spot wipe-ability.
摘要:
In an optical recording medium 100 having two recording layers of a first recording layer 102 and a second recording layer 105, the second recording layer 105 contains metallized azo dyes represented by the following general formula (I) or (II), and recording characteristics of the second recording layer 105 are improved by having optical density of 1.3 times as large as, or 1.3 times greater than, that of a dye contained in the first recording layer 102. (In this regard, rings A1 and A2 are nitrogen-containing heteroaromatic rings, rings B1 and B2 are aromatic rings, and X is alkyl group substituted by at least two fluorine atoms.)
摘要:
[PROBLEMS] To provide a monomethine dye compound that enables formation of a thin film with high refractive index and excellent optical properties through formation of a homogeneous thin film of dye molecule J-association complex by easy means (spin coating technique) and that has high sensitivity and excels in short mark recording capability so as to be suitable for high speed recording and high density recording, and further to provide an optical information recording medium utilizing the monomethine dye compound and a process for producing the same. [MEANS FOR SOLVING PROBLEMS] Attention has been focused on employment of a spin coating technique so that a homogeneous thin film can be easily formed through coating; on using of a dye material capable of forming a J-association complex to thereby realize excellent optical properties (high refractive index); on using of an oxocyanine dye of high solubility as the dye material so as to enable employment of a solvent free from substrate erosion; on using of a dye exhibiting a large difference between refractive index before recording and refractive index after recording, the decomposition of the dye brought about by an endothermal reaction; etc. There is provided a monomethine dye compound of Fig. 1 characterized in that it is applicable onto a substrate by a spin coating technique.
摘要:
A recording/reproducing method for a dye recordable DVD medium, wherein an excellent recorded waveforms can be obtained when a high linear speed recording is performed. Recording/reproducing method and apparatus for a dye recordable DVD medium, wherein marks other than the shortest and longest ones are high-outputted, at two locations that are the leading and trailing edges of a heating pulse for a certain time period, onto that recording layer of an optical recording medium which contains at least organic dye on a substrate having a guide groove where a high frequency wobble is provided, and wherein one pulse light, in which the pulse optical power of the leading edge of the heating pulse is greater than that of the trailing edge thereof, is used to perform recording, and a reproducing light is used to reproduce such recording.
摘要:
An optical recording material for use in an optical recording layer in an optical recording medium comprising the optical recording layer provided on a substrate. The optical recording material is characterized by comprising a cyanine compound represented by general formula (I): [I] wherein ring A and ring B represent an optionally substituted benzene ring or naphthalene ring; X represents O, S, Se, CR3R4 or NY; one of R1 and R2 represents a specific group represented by general formula (II) or (III) with the other group representing an organic group having 1 to 30 carbon atoms; R3 and R4 represent an organic group having 1 to 30 carbon atoms; Y, Y1 and Y2 each independently represent a hydrogen atom or an organic group having 1 to 30 carbon atoms; Z represents a hydrogen atom, a halogen atom, or a cyano group; Anm- represents a m-valent anion; m is an integer of 1 or 2; and p represents a coefficient for maintaining the charge in a neutral state.