Patent EP0304050A1 successfully refreshed from Google Patents.
EP0304050A1
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Optical information recording medium
Assignee: Fujifilm Holdings Corp
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Filing: 1988-08-18
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Granted: —
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Expires: 2008-08-18
Abstract
Abstract An optical information recording medium for carrying out recording, readout or erasing with layer beams, which comprises a support having carried thereon at least one of compounds represented by the general formula (I): wherein R¹ and R² independently represent substituted or unsubstituted alkyl groups, or substituted or unsubstituted aryl groups, Z represents an atomic group for forming a substituted or unsubstituted aromatic ring, and L represents a linking group for forming a carbocyanine. The present optical information recording media have an excellent recording performance and stability, and dyes used therein have no explosive property and thus can safely and readily be prepared.
Inventors
- 👤 Yoshio Inagaki
- 👤 Keiichi Adachi
- 👤 Masao Yabe
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 23:13
CPC Classifications
C; C09; C09B; C09B23/00; C09B23/02; C09B23/08; C09B23/086; G; G11; G11B; G11B7/00; G11B7/24; G11B7/241; G11B7/242; G11B7/244; G11B7/246; G11B7/247; G11B7/2472; G11B7/249; G11B7/245; G11B7/252; G11B7/253; G11B7/2531; G11B7/2533; G11B7/2534; Y; Y10; Y10S; Y10S430/00; Y10S430/145; Y10S430/146; Y10S430/165
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
77 words
An optical information recording medium for carrying out recording, readout or erasing with laser beams which comprises a support having carried thereon at least one of compounds represented by the general formula (I): wherein R¹ and R² independently represent a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group, Z represents an atomic group necessary for forming a substituted or unsubstituted aromatic ring, and L represents a linking group necessary for forming a carbocyanine.
Claim 2
Dependent Claim
77 words
An optical information recording medium for carrying out recording, readout or erasing with laser beams which comprises a support having carried thereon at least one of compounds represented by the general formula (I): wherein R¹ and R² independently represent a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group, Z represents an atomic group necessary for forming a substituted or unsubstituted aromatic ring, and L represents a linking group necessary for forming a carbocyanine.
Claim 3
Dependent Claim
31 words
The optical information recording medium of claim 1 wherein the substituents in the definition of R¹, R² and Z are independently a group whose hydrophobic parameter π is -0.5 to 15.
Claim 4
Dependent Claim
39 words
The optical information recording medium of claim 1 wherein the substituents in the definition of R¹ and R² are independently a halogen atom, a substituted or unsubstituted phenyl group, an alkylthio group, or a substituted or unsubstituted phenylthio group.
Claim 5
Dependent Claim
28 words
The optical information recording medium of claim 1 wherein the aromatic ring in the definition of Z is a benzene ring, a naphthalene ring or an anthracene ring.
Claim 6
Dependent Claim
49 words
The optical information recording medium of claim 1 wherein the substituent is a halogen atom, a substituted or unsubstituted phenyl group, an alkylthio group, a substituted or unsubstituted phenylthio group, a substituted or unsubstituted alkyl group, a cyano group, an alkoxycarbonyl group, an alkylsulfonyl group, or an arylsulfonyl group.
Claim 7
Dependent Claim
30 words
The optical information recording medium of claim 1 wherein Z is an atomic group for forming a benzene ring having a substituent whose Hammett's sigma constant is -0.2 to +0.7.
Claim 8
Dependent Claim
85 words
The optical information recording medium of claim 1 wherein L is represented by one of the following general formulae (a) to (i): General formula (a) -CH=CH-CH=CH- =CH-CH=CH-CH= General formula (b) -CH=CH- =CH-CH= General formula (h) =CH-CH=CH- =CH-CH=CH- General formula (i) =CH- =CH- wherein Y is a hydrogen atom, a lower alkyl group, a substituted or unsubstituted phenyl group, an aralkyl group, a lower alkoxy group, a disubstituted amino group, an alkylcarbonyloxy group, an alkylthio group, a cyano group, a nitro group or a halogen atom.
Claim 9
Dependent Claim
14 words
The optical information recording medium of claim 1 which comprises a singlet oxygen quencher.
Claim 10
Dependent Claim
51 words
The optical information recording medium of claim 1 wherein the quencher is a compound represented by the gereral formula (II) or (III): wherein [Cat₁] and [Cat₂] represent cations necessary for making the compound neutral, M₁ and M₂ independently represent nickel, copper, cobalt, palladium or platinum, and n represents 1 or 2.
Claim 11
Dependent Claim
24 words
The optical information recording medium of claim 9 wherein [Cat₁] and [Cat₂] represent an alkali metal ion, an alkaline earth metal ion or NH₄⁺.
Claim 12
Dependent Claim
87 words
The optical information recording medium of claim 9 wherein [Cat₁] and [Cat₂] are cations represented by one of the general formulae (IV-a) to (IV-e): wherein R¹¹, R¹², R¹³, R¹⁴, R¹⁵, R¹⁶, R¹⁷, R¹⁸, R¹⁹, R²⁰, R²¹ and R²² independently represent substituted or unsubstituted alkyl groups having 1 to 20 carbon atoms, or substituted or unsubstituted aryl groups having 6 to 14 carbon atoms, and Z¹ and Z² independently represent nonmetal atomic groups which form 5-membered or 6-membered ring together with a nitrogen atom or a phosphorous atom.
Claim 13
Dependent Claim
112 words
The optical information recording medium of claim 11 wherein the substituents of the alkyl group and aryl group in the definition of R¹¹ to R²² are independently a cyano group, a hydroxyl group, an alkyl group having 1 to 20 carbon atoms, an aryl group having 6 to 14 carbon atoms, an acyloxy group having 2 to 20 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, an aryloxy group, an aralkyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, an acyl group, an acylamino group, a substituted or unsubstituted carbamoyl group, an alkylsulfonylamino group, an arylsulfonylamino group, an alkylsulfamoyl group, an arylsulfamoyl group, an alkylsulfonyl group or an arylsulfonyl group.
Claim 14
Dependent Claim
51 words
The optical information recording medium of claim 11 wherein the 5-membered ring or 6-membered ring in the definition of Z¹ and Z² is a pyridine ring, an imidazole ring, a pyrrole ring, a 2-pyrroline ring, a pyrrolidine ring, a piperidine ring, a pyrazole ring, a pyrazoline ring or an imidazoline ring.
Claim 15
Dependent Claim
21 words
The optical information recording medium of claim 1 wherein the film thickness of the recording layer is 0.01 to 2 micrometers.
Claim 16
Dependent Claim
32 words
The optical information recording medium of claim 8 wherein the quencher is used in an amount of 0.05 to 12 moles per 1 mole of the compound of the general formula (I).
Claim 17
Dependent Claim
43 words
The optical information recording medium of claim 1 wherein a subbing layer is provided on the support, a protective, layer is provided on the dye thin film recording layer, and/or a reflecting layer is provided on the support or on the recording layer.
Claim 18
Dependent Claim
17 words
The optical information recording medium of claim 8 wherein the quencher is contained in the recording layer.
Claim 19
Dependent Claim
15 words
The optical information recording medium of claim 1 wherein the support is glass or plastics.
Claim 20
Dependent Claim
27 words
The optical information recording medium which comprises a binder in an amount of 0.01 to 2 times the weight of the compound of the general formula (I).
Claim 21
Dependent Claim
27 words
The optical information recording medium which comprises a binder in an amount of 0.01 to 2 times the weight of the compound of the general formula (I).
References Cited (Backward Citations)
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