WO2024005141A1 - ホログラム記録媒体用組成物 - Google Patents
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- WO2024005141A1 WO2024005141A1 PCT/JP2023/024171 JP2023024171W WO2024005141A1 WO 2024005141 A1 WO2024005141 A1 WO 2024005141A1 JP 2023024171 W JP2023024171 W JP 2023024171W WO 2024005141 A1 WO2024005141 A1 WO 2024005141A1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/40—High-molecular-weight compounds
- C08G18/42—Polycondensates having carboxylic or carbonic ester groups in the main chain
- C08G18/4266—Polycondensates having carboxylic or carbonic ester groups in the main chain prepared from hydroxycarboxylic acids and/or lactones
- C08G18/4269—Lactones
- C08G18/4277—Caprolactone and/or substituted caprolactone
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/67—Unsaturated compounds having active hydrogen
- C08G18/675—Low-molecular-weight compounds
- C08G18/677—Low-molecular-weight compounds containing heteroatoms other than oxygen and the nitrogen of primary or secondary amino groups
- C08G18/678—Low-molecular-weight compounds containing heteroatoms other than oxygen and the nitrogen of primary or secondary amino groups containing nitrogen
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F283/00—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G
- C08F283/006—Macromolecular compounds obtained by polymerising monomers on to polymers provided for in subclass C08G on to polymers provided for in C08G18/00
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/08—Processes
- C08G18/16—Catalysts
- C08G18/22—Catalysts containing metal compounds
- C08G18/227—Catalysts containing metal compounds of antimony, bismuth or arsenic
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
- C08G18/2805—Compounds having only one group containing active hydrogen
- C08G18/285—Nitrogen containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/74—Polyisocyanates or polyisothiocyanates cyclic
- C08G18/75—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic
- C08G18/751—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring
- C08G18/752—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group
- C08G18/753—Polyisocyanates or polyisothiocyanates cyclic cycloaliphatic containing only one cycloaliphatic ring containing at least one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group containing one isocyanate or isothiocyanate group linked to the cycloaliphatic ring by means of an aliphatic group having a primary carbon atom next to the isocyanate or isothiocyanate group
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
- C08G18/78—Nitrogen
- C08G18/7806—Nitrogen containing -N-C=0 groups
- C08G18/7818—Nitrogen containing -N-C=0 groups containing ureum or ureum derivative groups
- C08G18/7837—Nitrogen containing -N-C=0 groups containing ureum or ureum derivative groups containing allophanate groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
- C08G18/78—Nitrogen
- C08G18/79—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates
- C08G18/791—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/77—Polyisocyanates or polyisothiocyanates having heteroatoms in addition to the isocyanate or isothiocyanate nitrogen and oxygen or sulfur
- C08G18/78—Nitrogen
- C08G18/79—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates
- C08G18/791—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups
- C08G18/792—Nitrogen characterised by the polyisocyanates used, these having groups formed by oligomerisation of isocyanates or isothiocyanates containing isocyanurate groups formed by oligomerisation of aliphatic and/or cycloaliphatic isocyanates or isothiocyanates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G18/00—Polymeric products of isocyanates or isothiocyanates
- C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
- C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
- C08G18/72—Polyisocyanates or polyisothiocyanates
- C08G18/80—Masked polyisocyanates
- C08G18/8061—Masked polyisocyanates masked with compounds having only one group containing active hydrogen
- C08G18/8064—Masked polyisocyanates masked with compounds having only one group containing active hydrogen with monohydroxy compounds
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/32—Holograms used as optical elements
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/01—Head-up displays
- G02B27/017—Head mounted
- G02B27/0172—Head mounted characterised by optical features
- G02B2027/0174—Head mounted characterised by optical features holographic
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
- G03H1/0252—Laminate comprising a hologram layer
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/04—Processes or apparatus for producing holograms
- G03H1/0402—Recording geometries or arrangements
- G03H1/0408—Total internal reflection [TIR] holograms, e.g. edge lit or substrate mode holograms
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03H—HOLOGRAPHIC PROCESSES OR APPARATUS
- G03H1/00—Holographic processes or apparatus using light, infrared or ultraviolet waves for obtaining holograms or for obtaining an image from them; Details peculiar thereto
- G03H1/02—Details of features involved during the holographic process; Replication of holograms without interference recording
- G03H2001/026—Recording materials or recording processes
- G03H2001/0264—Organic recording material
Definitions
- the present invention relates to a composition for holographic recording media, a cured product for holographic recording media obtained by curing this composition for holographic recording media, and a holographic recording medium using this composition for holographic recording media.
- Holographic recording media which have been attracting attention in recent years, are recording media that utilize light interference and diffraction phenomena.
- a hologram is a recording method that three-dimensionally records an interference pattern created by the interference fringes of two lights called a reference light and an object light (also called information light or signal light) (these are called recording lights) inside a recording medium. It is.
- a hologram recording medium includes a photosensitive material in its recording layer, and the photosensitive material chemically changes in accordance with the interference pattern, thereby recording the interference pattern by locally changing its optical properties.
- Holographic recording media were being developed for memory applications. As another use of the hologram recording medium, studies are being conducted to apply it to optical elements such as AR glass light guide plates. In the case of AR glasses (AR glasses) applications, the hologram-recorded optical element used in the light guide plate is required to have a wide viewing angle, high diffraction efficiency for light in the visible region, and high transparency of the medium.
- AR glasses AR glasses
- Hologram recording media can be divided into several types depending on what kind of optical properties are changed.
- Volume hologram media which performs recording by creating a refractive index difference within a recording layer with a certain thickness or more, are advantageous for AR glass light guide plate applications because they can save space and achieve high diffraction efficiency and wavelength selectivity. It is believed that.
- An example of a volume hologram recording medium is a write-once format that does not require wet processing or bleaching.
- the composition of the recording layer is generally one in which a photoactive compound is dissolved in a matrix resin.
- a photopolymer in which a matrix resin is combined with a photopolymerization initiator and a polymerizable reactive compound capable of radical polymerization or cationic polymerization as a recording layer (Patent Document 1-4).
- the photopolymerization initiator When recording a hologram, if there is a recording layer made of photopolymer in the area where the reference beam and object beam intersect to form an interference pattern, the photopolymerization initiator will undergo a chemical reaction in the areas of the interference pattern where the light intensity is high.
- the active substance acts on the polymerizable compound and the polymerizable compound polymerizes. At this time, if there is a difference in refractive index between the matrix resin and the polymer produced from the polymerizable compound, the interference pattern becomes a refractive index difference and is fixed in the recording layer.
- the process of changing the optical characteristics of the recording layer by exposing the recording layer of the medium under predetermined conditions as described above will be referred to as “recording exposure.”
- the process of repeatedly recording and exposing different interference patterns at the same position by changing the intersection angle of the reference beam and the object beam or by changing their respective incident angles is called “multiple recording exposure.”
- the number of times of multiplex recording exposure is called the “total multiplex number”.
- the interval between interference patterns (grating pitch) formed in a medium is not constant, and generally the grating pitch ranges from narrow to wide. At this time, it is desirable that the polymerization reaction proceeds equally whether the grating pitch is narrow or wide, and a hologram is formed. However, as a result of studies conducted by the present inventors, it has been found that, depending on the medium, the performance of the formed hologram changes depending on the grating pitch.
- An object of the present invention is to provide a hologram recording medium whose hologram recording performance does not depend on the grating pitch.
- the present inventors have discovered that by using a recording material containing a certain amount or more of allophanate binding units, it is possible to produce a hologram recording medium with excellent recording performance stability in which the hologram recording performance does not depend on the grating pitch. This makes it possible to reduce color unevenness and improve brightness of the hologram. That is, the gist of the present invention is as follows.
- [1] Contains the following components (a) to (d), and the amount of allophanate binding units contained in component (a) relative to the total weight of component (a) and component (b) is 6.5 ⁇ 10 - 4 mol/g or more.
- a composition for a holographic recording medium Component (a): Compound having an isocyanate group
- the content of the component (c) in the composition is 0.1% by weight or more and 80% by weight or less, and the content of the component (d) is 0.1% by weight relative to the component (c).
- the composition for a holographic recording medium according to any one of [1] to [3], which has a content of % by weight or more and 20% by weight or less.
- composition for a holographic recording medium according to any one of [1] to [4], further comprising the following component (e).
- component (e) Compound having a nitroxyl radical group
- the molar ratio of the component (e) and the component (d) in the composition (component (e)/component (d)) is 0.1 or more and 10 or less, [5] to [7] The composition for a holographic recording medium according to any one of the above.
- the total content of the component (a) and the component (b) in the composition is 0.1% by weight or more and 99.9% by weight or less, and the number of isocyanate groups contained in the component (a) is The composition for a holographic recording medium according to any one of [1] to [8], wherein the ratio of the number of isocyanate-reactive functional groups contained in the component (b) to the number of isocyanate-reactive functional groups is 0.1 or more and 10.0 or less.
- composition for a holographic recording medium according to any one of [1] to [9], further comprising the following component (f).
- a cured product for a hologram recording medium obtained by curing the composition for a hologram recording medium according to any one of [1] to [10].
- a laminate for a holographic recording medium comprising a recording layer made of the cured product for a holographic recording medium according to [11] and a support.
- a hologram recording medium obtained by exposing the cured product for a hologram recording medium according to [11] or the laminate for a hologram recording medium according to [12].
- the present invention by using a recording material containing a certain amount or more of allophanate binding units, it is possible to produce a hologram recording medium whose hologram recording performance does not depend on the grating pitch. This makes it possible to reduce color unevenness and improve brightness of the hologram.
- FIG. 1 is a configuration diagram showing an outline of an apparatus used for transmission hologram recording in an example.
- FIG. 2 is a configuration diagram showing an outline of an apparatus used for holographic recording of reflections in the example.
- composition for a hologram recording medium of the present invention contains the following components (a) to (d), and the presence of allophanate binding units contained in component (a) relative to the total weight of component (a) and component (b). It is characterized in that the amount is 6.5 ⁇ 10 ⁇ 4 mol/g or more.
- Component (a) a compound having an isocyanate group, reacts with a compound having an isocyanate-reactive functional group (component (b)), preferably in the presence of a curing catalyst (component (f)) described below, to form a resin matrix. It is a constituent component.
- the proportion of isocyanate groups in the molecule of the compound having isocyanate groups is preferably 50% by weight or less, more preferably 47% by weight or less, still more preferably 45% by weight or less.
- This lower limit is usually 0.1% by weight or more, preferably 1% by weight or more.
- turbidity is less likely to occur when a hologram recording medium is produced, and optical uniformity can be obtained. If the proportion of isocyanate groups is equal to or higher than the above lower limit, the hardness and glass transition temperature of the resin matrix will increase, and loss of recording can be prevented.
- the proportion of isocyanate groups in the present invention indicates the proportion of isocyanate groups in the entire compound having isocyanate groups to be used, and the proportion of isocyanate groups in the compound having isocyanate groups is determined from the following formula.
- the molecular weight of the isocyanate group is 42. (42 x number of isocyanate groups/molecular weight of compound having isocyanate groups) x 100
- the type of compound having an isocyanate group is not particularly limited, and may have, for example, an aromatic, araliphatic, aliphatic, or alicyclic skeleton. Further, the compound having an isocyanate group may have one isocyanate group or two or more isocyanate groups in the molecule, but preferably has two or more isocyanate groups. This is a compound that has two or more isocyanate groups in the molecule (component (a)), a compound that has three or more isocyanate-reactive functional groups in the molecule (component (b)), or a compound that has three or more isocyanate-reactive functional groups in the molecule (component (b)).
- Examples of compounds having an isocyanate group include isocyanic acid, butyl isocyanate, octyl isocyanate, butyl diisocyanate, hexamethylene diisocyanate (HMDI), isophorone diisocyanate (IPDI), 1,8-diisocyanato-4-(isocyanatomethyl ) octane, 2,2,4- or 2,4,4-trimethylhexamethylene diisocyanate, the isomers bis(4,4'-isocyanatocyclohexyl)methane and mixtures thereof with any desired isomer content, isocyanates Methyl-1,8-octane diisocyanate, 1,4-cyclohexylene diisocyanate, isomer cyclohexane dimethylene diisocyanate, 1,4-phenylene diisocyanate, 2,4- or 2,6-toluene diisocyanate, 1,5-naflethylene di
- isocyanate derivatives having a urethane, urea, carbodiimied, acrylurea, isocyanurate, allophanate, biuret, oxadiazinetrione, uretdione and/or iminooxadiazinedione structure.
- composition for a holographic recording medium of the present invention uses a compound having an isocyanate group having an allophanate bonding unit represented by the following formula (I) as the compound having an isocyanate group as such component (a).
- the allophanate bond unit is generated by the reaction of a urethane bond with an isocyanate group. Therefore, a compound having an isocyanate group having an allophanate bonding unit represented by the above formula (I) can be obtained by, for example, obtaining a urethane compound of a polyfunctional isocyanate by subjecting a polyfunctional isocyanate and an alcohol to a urethanization reaction, and It can be obtained by reacting a compound having an isocyanate group.
- polyfunctional isocyanate used in this reaction examples include hexamethylene diisocyanate (HMDI), isophorone diisocyanate (IPDI), 1,8-diisocyanato-4-(isocyanatomethyl)octane, 2,2,4- or 2 , 4,4-trimethylhexamethylene diisocyanate, isomer bis(4,4'-isocyanatocyclohexyl)methane and mixtures thereof with any desired isomer content, isocyanatomethyl-1,8-octane diisocyanate, 1, 4-Cyclohexylene diisocyanate, isomer cyclohexane dimethylene diisocyanate, 1,4-phenylene diisocyanate, 2,4- or 2,6-toluene diisocyanate, 1,5-naflethylene diisocyanate, 2,4'- or 4,4' -diphenylmethane diisocyanate, triphenylmethane
- Examples of the alcohol include linear monovalent aliphatic alcohols and branched monovalent aliphatic alcohols.
- Examples of the linear monohydric aliphatic alcohol include linear monohydric aliphatic alcohols having 1 to 20 carbon atoms.
- Examples of linear monohydric aliphatic alcohols having 1 to 20 carbon atoms include methanol, ethanol, n-propanol, n-butanol, n-pentanol, n-hexanol, n-heptanol, n-octanol, n- Nonanol, n-decanol, n-undecanol, n-dodecanol (lauryl alcohol), n-tridecanol, n-tetradecanol, n-pentadecanol, n-hexadecanol, n-heptadecanol, n-octadecanol Nol (stearyl alcohol
- a compound having an isocyanate group containing an allophanate bonding unit as described above is used in the following abundance amount.
- the amount of allophanate binding units is within the following range, only compounds having isocyanate groups containing allophanate binding units may be used as compounds having isocyanate groups, and compounds having isocyanate groups containing allophanate binding units and It may be used in combination with a compound having an isocyanate group that does not contain an allophanate bonding unit.
- allophanate bond units have a weaker intermolecular force than urethane bonds, so their interaction with polymerizable monomers is small and the diffusion coefficient of the polymerizable monomer within the composition can be maintained, making it ideal for gratings in hologram recording. By suppressing pitch dependence, color unevenness can be reduced and brightness can be improved.
- the amount of allophanate bonding units contained in the compound having an isocyanate group as component (a) is 2.0 ⁇ 10 ⁇ 3 mol/g as a molar ratio to the total weight of component (a) and component (b).
- the amount of allophanate bonding units present is determined by the total weight of the compound having an isocyanate group used as component (a) and the compound having an isocyanate-reactive functional group used as component (b) and the allophanate bonding unit in component (a). It can be determined by calculation from the molar amount of . The calculation method will be explained in the Examples section below.
- the compound having an isocyanate-reactive functional group as component (b) is a compound having an active hydrogen (isocyanate-reactive functional group) that participates in a chain extension reaction with the compound having an isocyanate group as component (a).
- the isocyanate-reactive functional group include a hydroxyl group, an amino group, and a mercapto group.
- the compound having an isocyanate-reactive functional group may have one or more isocyanate-reactive functional groups in the molecule, but preferably has two or more. In addition, when it has two or more isocyanate-reactive functional groups, the number of isocyanate-reactive functional groups contained in one molecule may be one type, or may be plural types.
- the number average molecular weight of the compound having an isocyanate-reactive functional group is usually 50 or more, preferably 100 or more, and more preferably 150 or more. Moreover, it is usually 50,000 or less, 10,000 or less, and more preferably 5,000 or less.
- the number average molecular weight of the compound having an isocyanate-reactive functional group is equal to or higher than the above lower limit, the crosslink density decreases, and a decrease in recording speed can be prevented.
- the number average molecular weight of the compound having an isocyanate-reactive functional group is below the above upper limit, loss of recorded content can be prevented due to improved compatibility with other components and increased crosslinking density. .
- the number average molecular weight of component (b) is a value measured by gel permeation chromatography (GPC).
- the compound having a hydroxyl group as an isocyanate-reactive functional group may have one or more hydroxyl groups in one molecule, but compounds having two or more hydroxyl groups are preferred.
- examples include glycols such as ethylene glycol, triethylene glycol, diethylene glycol, polyethylene glycol, propylene glycol, polypropylene glycol (PPG), and neopentyl glycol; butanediol, pentanediol, hexanediol, heptanediol, and tetramethylene glycol (TMG).
- diols such as polytetramethylene glycol (PTMG); bisphenols; triols such as glycerin, trimethylolpropane, butanetriol, pentanetriol, hexanetriol, and decanetriol;
- PTMG polytetramethylene glycol
- triols such as glycerin, trimethylolpropane, butanetriol, pentanetriol, hexanetriol, and decanetriol
- examples include compounds modified with oxy chains; polyfunctional polyoxybutylene; polyfunctional polycaprolactone; polyfunctional polyester; polyfunctional polycarbonate; polyfunctional polypropylene glycol. Any one of these may be used alone, or two or more may be used in combination in any combination and ratio.
- the number average molecular weight of the compound having a hydroxyl group is usually 50 or more, preferably 100 or more, and more preferably 150 or more. Moreover, it is usually 50,000 or less, 10,000 or less, and more preferably 5,000 or less.
- the number average molecular weight of the compound having a hydroxyl group is equal to or higher than the above lower limit, the crosslink density decreases, and a decrease in recording speed can be prevented.
- the number average molecular weight of the compound having a hydroxyl group is less than or equal to the above upper limit, the recorded content can be prevented from disappearing due to improved compatibility with other components and increased crosslinking density.
- the compound having an amino group as an isocyanate-reactive functional group may be one having one or more amino groups in one molecule, but preferably one having two or more amino groups.
- Examples include aliphatic amines such as ethylenediamine, diethylenetriamine, triethylenetetramine, hexamethylenediamine; alicyclic amines such as isophoronediamine, menthanediamine, 4,4'-diaminodicyclohexylmethane; m-xylylenediamine, diaminodiamine, etc.
- Aromatic amines such as diphenylmethane and m-phenylenediamine; and the like. Any one of these may be used alone, or two or more may be used in combination in any combination and ratio.
- the number average molecular weight of the compound having an amino group is usually 50 or more, preferably 100 or more, and more preferably 150 or more. Moreover, it is usually 50,000 or less, 10,000 or less, and more preferably 5,000 or less.
- the number average molecular weight of the compound having an amino group is equal to or higher than the above lower limit, the crosslink density decreases, and a decrease in recording speed can be prevented.
- the number average molecular weight of the compound having an amino group is less than or equal to the above upper limit, the recorded content can be prevented from disappearing due to improved compatibility with other components and increased crosslinking density.
- the compound having a mercapto group as an isocyanate-reactive functional group may have one or more mercapto groups in one molecule, but compounds having two or more mercapto groups are preferred. Examples include 1,3-butanedithiol, 1,4-butanedithiol, 2,3-butanedithiol, 1,2-benzenedithiol, 1,3-benzenedithiol, 1,4-benzenedithiol, 1,10 -Decanedithiol, 1,2-ethanedithiol, 1,6-hexanedithiol, 1,9-nonanedithiol, pentaerythritol tetrakis (3-mercaptopropionate), pentaerythritol tetrakis (2-mercaptoacetate), pentaerythritol tetrakis (3-mercaptobutyrate), trimethylolpropane tris (3-mercapto
- the number average molecular weight of the compound having a mercapto group is usually 50 or more, preferably 100 or more, and more preferably 150 or more. Moreover, it is usually 50,000 or less, 10,000 or less, and more preferably 5,000 or less.
- the number average molecular weight of the compound having a mercapto group is equal to or higher than the above lower limit, the crosslink density decreases, and a decrease in recording speed can be prevented.
- the number average molecular weight of the compound having a mercapto group is less than or equal to the above upper limit, the recorded content can be prevented from disappearing due to improved compatibility with other components and increased crosslinking density.
- polycaprolactones As component (b), it is preferable to use polycaprolactones from the viewpoint of stability as a material and flexibility of structure.
- polycaprolactones used as component (b) include ethylene glycol, diethylene glycol, triethylene glycol, propylene glycol, dipropylene glycol, 1,3-butanediol, 1,4-butanediol, hexamethylene glycol, and methylpentane.
- the polymerizable monomer of component (c) is a compound that can be polymerized by the photopolymerization initiator of component (d) described below, and is a monomer compound that is polymerized during recording and/or during post-exposure.
- the type of polymerizable monomer used in the composition for a holographic recording medium of the present invention is not particularly limited, and can be appropriately selected from known compounds.
- Examples of polymerizable monomers include cationically polymerizable monomers, anionically polymerizable monomers, radically polymerizable monomers, and the like. Any of these may be used, or two or more types may be used in combination.
- cationically polymerizable monomers examples include epoxy compounds, oxetane compounds, oxolane compounds, cyclic acetal compounds, cyclic lactone compounds, thiirane compounds, thietane compounds, vinyl ether compounds, spiro-orthoester compounds, ethylenically unsaturated bond compounds, and cyclic ether compounds. , cyclic thioether compounds, vinyl compounds, etc. Any one of the above cationically polymerizable monomers may be used alone, or two or more may be used in combination in any combination and ratio.
- anionically polymerizable monomers examples include hydrocarbon monomers, polar monomers, and the like.
- hydrocarbon monomers include styrene, ⁇ -methylstyrene, butadiene, isoprene, vinylpyridine, vinylanthracene, and derivatives thereof.
- polar monomers include methacrylic esters, acrylic esters, vinyl ketones, isopropenyl ketones, and other polar monomers. Any one of the anionic polymerizable monomers exemplified above may be used alone, or two or more may be used in combination in any combination and ratio.
- radically polymerizable monomers examples include compounds having (meth)acryloyl groups, (meth)acrylamides, vinyl esters, vinyl compounds, styrenes, spiro ring-containing compounds, and the like.
- the radically polymerizable monomers exemplified above may be used alone or in combination of two or more in any desired ratio.
- the polymerizable monomer used in the composition for a holographic recording medium of the present invention usually has a molecular weight of 80 or more, preferably 150 or more, and more preferably 300 or more. Moreover, it is usually 3000 or less, preferably 2500 or less, and more preferably 2000 or less.
- the molecular weight is at least the above lower limit, it is possible to reduce the shrinkage rate due to polymerization of light irradiation during information recording of the hologram.
- the molecular weight is below the above upper limit, the mobility of the polymerizable monomer in the recording layer using the composition for holographic recording media is high, diffusion occurs easily, and sufficient diffraction efficiency can be obtained. .
- the polymerizable monomer has a refractive index of usually 1.50 or more, preferably 1.52 or more, more preferably 1.55 or more, and usually 1.80 or more at the wavelength of light irradiated onto the hologram recording medium (recording wavelength, etc.). It is preferably 1.78 or less. If the refractive index is too small, the diffraction efficiency may not be sufficient and the multiplicity may not be sufficient. If the refractive index is too large, the difference in refractive index with the resin matrix will become too large and scattering will increase, resulting in a decrease in transmittance and a need for greater energy during recording and reproduction.
- the refractive index shows a large value when evaluated at short wavelengths, but a sample that shows a relatively large refractive index at short wavelengths also shows a relatively large refractive index at long wavelengths, and this relationship is never reversed. Therefore, it is also possible to evaluate the refractive index at a wavelength other than the recording wavelength and predict the refractive index at the recording wavelength.
- the refractive index of the polymerizable monomer can be measured by the minimum deviation angle method, critical angle method, V-block method, etc.
- the sample is a solid, the compound is dissolved in a suitable solvent to form a solution, the refractive index of this solution is measured, and the refractive index when the compound is 100% can be determined by extrapolation.
- halogen atom iodine, chlorine, bromine, etc.
- hetero atom nitrogen, sulfur, oxygen, etc.
- the polymerizable monomer preferably has a molar absorption coefficient of 100 L ⁇ mol ⁇ 1 ⁇ cm ⁇ 1 or less at the recording wavelength of the hologram.
- a molar extinction coefficient of 100 L ⁇ mol ⁇ 1 ⁇ cm ⁇ 1 or less it is possible to prevent the transmittance of the medium from becoming low and to obtain sufficient diffraction efficiency for the thickness.
- a photopolymerization initiator is one that generates cations, anions, and radicals that cause chemical reactions when exposed to light, and contributes to the polymerization of the above-mentioned polymerizable monomers.
- the type of photopolymerization initiator is not particularly limited, and can be appropriately selected depending on the type of polymerizable monomer.
- Any known cationic photopolymerization initiator can be used as the cationic photopolymerization initiator.
- aromatic onium salts include aromatic onium salts. Specific examples include anion components such as SbF 6 - , BF 4 - , AsF 6 - , PF 6 - , CF 3 SO 3 - , B(C 6 F 5 ) 4 - , and iodine, sulfur, nitrogen, phosphorus, etc. Examples include compounds consisting of an aromatic cation component containing an atom of Among these, diaryliodonium salts, triarylsulfonium salts, and the like are preferred. Any one of the above-exemplified cationic photopolymerization initiators may be used alone, or two or more may be used in combination in any combination and ratio.
- anionic photopolymerization initiator can be used as the anionic photopolymerization initiator.
- examples include amines.
- amines include dimethylbenzylamine, dimethylaminomethylphenol, amino group-containing compounds such as 1,8-diazabicyclo[5.4.0]undecene-7, and derivatives thereof; imidazole, 2-methylimidazole, Examples include imidazole compounds such as 2-ethyl-4-methylimidazole, and derivatives thereof.
- Any one of the anionic photopolymerization initiators exemplified above may be used alone, or two or more may be used in combination in any combination and ratio.
- radical photopolymerization initiator can be used as the radical photopolymerization initiator.
- examples include phosphine oxide compounds, azo compounds, azide compounds, organic peroxides, organic borates, onium salts, bisimidazole derivatives, titanocene compounds, iodonium salts, organic thiol compounds, halogenated hydrocarbon derivatives, oxime ester compounds. etc. are used. Any one of the radical photopolymerization initiators exemplified above may be used alone, or two or more may be used in combination in any combination and ratio.
- photopolymerization initiators include imidazole derivatives, oxadiazole derivatives, naphthalene, perylene, pyrene, anthracene, coumarin, chrysene, p-bis(2-phenylethenyl)benzene and their derivatives, quinacridone derivatives, Coumarin derivatives, aluminum complexes such as Al( C9H6NO ) 3 , rubrene, perimidone derivatives, benzopyran derivatives, rhodamine derivatives, benzothioxanthene derivatives, azabenzothioxanthene, phenylpyridine complexes, porphyrin complexes, polyphenylene vinylene materials, etc. can be mentioned. .
- a compound having a molar absorption coefficient of 1000 L ⁇ mol ⁇ 1 ⁇ cm ⁇ 1 or less at the recording wavelength is particularly preferred.
- a molar extinction coefficient of 1000 L ⁇ mol ⁇ 1 ⁇ cm ⁇ 1 or less it is possible to suppress a decrease in the transmittance of the hologram recording medium at the recording wavelength, which occurs when mixing in an amount sufficient to obtain sufficient diffraction efficiency. can.
- the composition for a holographic recording medium of the present invention preferably contains component (e), which is a compound having a nitroxyl radical group, as an optional component.
- component (e) a compound having a nitroxyl radical group, a compound having an isocyanate-reactive functional group and a nitroxyl radical group is preferably used. Since the composition for a hologram recording medium of the present invention contains such component (e), the isocyanate-reactive functional group of component (e) reacts with the isocyanate group of component (a) and is immobilized in the resin matrix.
- recording sensitivity can be improved and a high ⁇ n can be realized.
- Examples of the isocyanate-reactive functional group contained in component (e) include those similar to the isocyanate-reactive functional group contained in component (b).
- component (e) is not particularly limited, but specific examples include 4-hydroxy-2,2,6,6-tetramethylpiperidin-1-oxyl (TEMPOL), 4-sulfanyl-2,2 , 6,6-tetramethylpiperidine-1-oxyl, 4-amino-2,2,6,6-tetramethylpiperidine-1-oxyl, 4-mercapto-2,2,6,6-tetramethylpiperidine-1 -oxyl, 4-carboxy-2,2,6,6-tetramethylpiperidine-1-oxyl, 4-carbamoyl-2,2,6,6-tetramethylpiperidine-1-oxyl, 4-(2,3- epoxypropoxy)-2,2,6,6-tetramethylpiperidine-1-oxyl, 3-hydroxy-2,2,5,5-tetramethylpyrrolidine-1-oxyl, 3-sulfanyl-2,2,5, 5-tetramethylpyrrolidine-1-oxyl, 3-amino-2,2,5,5-tetramethylpyrrolidine-1-oxyl, 3-mercapto-2
- TEMPOL 4-sulfanyl-2,2,6,6-tetramethylpiperidine-1-oxyl, 4-amino-2,2,6 , 6-tetramethylpiperidin-1-oxyl, and 4-mercapto-2,2,6,6-tetramethylpiperidin-1-oxyl, and particularly preferably TEMPOL.
- composition for a hologram recording medium of the present invention further includes a curing catalyst as a component (f) that promotes the reaction between the compound having an isocyanate group as the component (a) and the compound having an isocyanate-reactive functional group as the component (b). It is preferable to include.
- a curing catalyst for component (f) it is preferable to use a bismuth-based catalyst that acts as a Lewis acid.
- bismuth-based catalysts include tris(2-ethylhexanate) bismuth, tribenzoyloxybismuth, bismuth triacetate, tris(dimethyldiocarbamic acid) bismuth, bismuth hydroxide, triphenylbismuth(V) bis(trichloroarate). ), tris(4-methylphenyl)oxobismuth (V), triphenylbis(3-chlorobenzoyloxy)bismuth (V), and the like.
- trivalent bismuth compounds are preferred from the viewpoint of catalytic activity, such as bismuth carboxylate, general formula Bi(OCOR) 3 (R is a linear or branched alkyl group, a cycloalkyl group, or a substituted or unsubstituted aromatic group).
- R is a linear or branched alkyl group, a cycloalkyl group, or a substituted or unsubstituted aromatic group.
- the one represented by is more preferable.
- Any one type of bismuth-based catalyst may be used alone, or two or more types may be used in combination in any combination and ratio.
- the curing catalyst other curing catalysts can be used in combination with the above-mentioned bismuth-based catalyst in order to adjust the reaction rate.
- the catalyst there are no particular restrictions on the catalyst that can be used in combination, as long as it does not go against the gist of the present invention, but in order to obtain a synergistic effect of the catalyst, it is preferable to use a compound having an amino group as part of its structure.
- TAA triethylamine
- DMEDA N,N-dimethylcyclohexylamine
- TEDA N,N,N',N'-tetramethylethylenediamine
- TMPDA N,N,N',N'-tetramethyl Propane-1,3-diamine
- TMHMDA N,N,N',N'-tetramethylhexane-1,6-diamine
- TMHMDA N,N,N',N",N"-pentamethyldiethylenetriamine
- PMDETA N,N,N',N",N"-pentamethyldipropylene-triamine
- TDA triethylenediamine
- DMP N,N'-dimethylpiperazine
- TMNAEP N-methylmorpholine
- NMMO N.(N',N'-dimethylaminoethyl)-morpholine
- NMMO N.(N',N'-dimethylaminoeth
- composition for a holographic recording medium of the present invention may contain other components as long as they do not go against the gist of the present invention.
- Other components include solvents, plasticizers, dispersants, leveling agents, antifoaming agents, adhesion promoters, etc. for preparing the recording layer of hologram recording media, and chain transfer agents for controlling recording reactions. , a polymerization terminator, a compatibilizer, a reaction aid, a sensitizer, an antioxidant, and the like. Any one type of these components may be used alone, or two or more types may be used in combination in any combination and ratio.
- composition ratio of each component in the composition for hologram recording medium The content of each component in the composition for a holographic recording medium of the present invention is arbitrary as long as it does not go against the gist of the present invention, but the content of each component is preferably within the following ranges.
- the total content of component (a) and component (b) in the composition for holographic recording media of the present invention is usually 0.1% by weight or more, preferably 10% by weight or more, and more preferably 35% by weight or more. It is. Further, it is usually 99.9% by weight or less, preferably 99% by weight or less, and more preferably 98% by weight or less.
- this content By setting this content to the above lower limit value or more, it becomes easy to form the recording layer. By keeping this content below the above upper limit, the content of other essential components can be ensured.
- the ratio of the number of isocyanate-reactive functional groups of component (b) to the number of isocyanate groups of component (a) is 0.1 or more, while satisfying the above-mentioned amount of allophanate bonding units present. It is preferably 0.5 or more, more preferably 0.5 or more. Moreover, this ratio is usually 10.0 or less, preferably 2.0 or less. When this ratio is within the above range, there are fewer unreacted functional groups and storage stability is improved.
- the content of component (c) in the composition for a holographic recording medium of the present invention is usually 0.1% by weight or more, preferably 1% by weight or more, and more preferably 2% by weight or more. Further, it is usually 80% by weight or less, preferably 50% by weight or less, and more preferably 30% by weight or less. Sufficient diffraction efficiency can be obtained because the amount of component (c) is at least the above lower limit. The compatibility of the recording layer is maintained because the amount of component (c) is below the above upper limit.
- the content of component (d) in the composition for a holographic recording medium of the present invention is usually 0.1% by weight or more, preferably 0.2% by weight or more, and more preferably 0.1% by weight or more relative to the content of component (c). .3% by weight or more. Further, it is usually 20% by weight or less, preferably 18% by weight or less, and more preferably 16% by weight or less. Sufficient recording sensitivity can be obtained when the proportion of component (d) is at least the above lower limit. When the proportion of component (d) is at most the above upper limit, it is possible to suppress a decrease in sensitivity due to bimolecular termination reaction due to generation of excessive radicals.
- the content of component (e) is the molar ratio of component (e) to component (d) (component (e)/component (d)). is usually 0.1 or more, particularly 0.2 or more, particularly 0.3 or more, and usually 10 or less, particularly 8 or less, especially 6 or less. If the ratio of component (e)/component (d) is at least the above lower limit, the effect of improving ⁇ n by containing component (e) can be effectively obtained.
- component (e)/component (d) is below the above upper limit, a radical polymerization reaction is allowed to proceed during exposure for recording purposes to obtain the degree of refractive index modulation necessary for forming a diffraction grating and to obtain sufficient recording sensitivity. be able to.
- the content of component (f) in the composition for hologram recording media of the present invention is preferably determined by taking into account the reaction rate of component (a) and component (b), and is usually 5% by weight or less, preferably 4% by weight. % or less, more preferably 1% by weight or less, and preferably 0.001% by weight or more.
- the total amount of other components other than components (a) to (f) in the composition for holographic recording media of the present invention is usually 30% by weight or less, preferably 15% by weight or less, and more preferably 5% by weight. .
- composition for hologram recording medium and cured product for hologram recording medium In producing the composition for holographic recording media of the present invention, components (a) to (d), preferably components (a) to (e), more preferably components (a) to (f) are used in any combination, They may be mixed in this order, or at that time, other components may be mixed in combination.
- the cured product for holographic recording media of the present invention By curing the obtained composition for holographic recording media, the cured product for holographic recording media of the present invention can be obtained. At this time, it may be heated at 30 to 100° C. for about 1 to 72 hours to accelerate the curing reaction.
- composition for hologram recording media and the cured product for hologram recording media of the present invention can also be produced according to the method for forming a recording layer in the method for producing a hologram recording medium of the present invention, which will be described later.
- the hologram recording medium of the present invention can be obtained by subjecting the cured product for hologram recording media of the present invention to interference exposure.
- the hologram recording medium of the present invention includes a recording layer and, if necessary, a support and other layers.
- a hologram recording medium has a support, and a recording layer and other layers are laminated on this support to constitute the hologram recording medium.
- the recording layer or other layers have the strength and durability necessary for the medium, the hologram recording medium does not need to have a support.
- other layers include a protective layer, a reflective layer, an antireflection layer (antireflection film), and the like.
- the recording layer of the holographic recording medium of the present invention is preferably formed from the composition for holographic recording media of the present invention.
- the recording layer of the holographic recording medium of the present invention is a layer formed from the composition for a holographic recording medium of the present invention, and is a layer on which information is recorded. Information is usually recorded as a hologram.
- a part of the polymerizable monomer contained in the recording layer undergoes a chemical change such as polymerization during hologram recording or the like. Therefore, in the hologram recording medium after recording, a part of the polymerizable monomer is consumed and exists as a reacted compound such as a polymer.
- the thickness of the recording layer is not particularly limited and may be determined as appropriate in consideration of the recording method, etc., but generally it is usually in the range of 1 ⁇ m or more, preferably 10 ⁇ m or more, and usually 3000 ⁇ m or less, preferably 2000 ⁇ m or less. It is.
- the thickness of the recording layer By setting the thickness of the recording layer to the above lower limit or more, the selectivity of each hologram becomes high during multiple recording in a hologram recording medium, and the degree of multiple recording can be increased.
- By setting the thickness of the recording layer to the above upper limit or less it becomes possible to uniformly mold the entire recording layer, and it is possible to perform multiple recording with uniform diffraction efficiency of each hologram and a high S/N ratio. .
- the shrinkage rate of the recording layer due to exposure during recording and reproduction of information is preferably 0.5% or less.
- ⁇ Support> There are no particular restrictions on the details of the support, and any support can be used as long as it has the strength and durability required for the medium. There are no restrictions on the shape of the support, but it is usually formed into a flat plate or film shape. There are no restrictions on the material constituting the support, and it may be transparent or opaque.
- transparent materials for the support include organic materials such as acrylic, polyethylene terephthalate, polyethylene naphthoate, polycarbonate, polyethylene, polypropylene, amorphous polyolefin, polystyrene, and cellulose acetate; and inorganic materials such as glass, silicon, and quartz. It will be done. Among these, polycarbonate, acrylic, polyester, amorphous polyolefin, glass, etc. are preferred, and polycarbonate, acrylic, amorphous polyolefin, and glass are particularly preferred.
- opaque support materials include metals such as aluminum; transparent supports coated with metals such as gold, silver, aluminum, or dielectrics such as magnesium fluoride and zirconium oxide; can be mentioned.
- the thickness of the support is usually preferably in the range of 0.05 mm or more and 1 mm or less.
- the thickness of the support is equal to or greater than the above lower limit, mechanical strength of the hologram recording medium can be obtained and warping of the substrate can be prevented. If the thickness of the support is equal to or less than the above upper limit, the amount of light transmitted can be maintained and an increase in cost can be suppressed.
- the surface of the support may be subjected to surface treatment.
- This surface treatment is usually performed to improve the adhesion between the support and the recording layer.
- Examples of surface treatments include subjecting the support to corona discharge treatment and forming an undercoat layer on the support in advance.
- examples of the composition of the undercoat layer include halogenated phenol, partially hydrolyzed vinyl chloride-vinyl acetate copolymer, polyurethane resin, and the like.
- the surface treatment may be performed for purposes other than improving adhesion.
- Examples include reflective coating treatment that forms a reflective coating layer made of metal such as gold, silver, or aluminum; dielectric coating treatment that forms a dielectric layer such as magnesium fluoride or zirconium oxide, etc. It will be done. These layers may be formed as a single layer, or may be formed as two or more layers.
- These surface treatments may be performed for the purpose of controlling the gas and moisture permeability of the substrate. For example, the reliability of the medium can be further improved by providing the supports that sandwich the recording layer with the function of suppressing gas and moisture permeability.
- the support may be provided only on either the upper side or the lower side of the recording layer of the holographic recording medium of the present invention, or may be provided on both sides. However, when supports are provided on both the upper and lower sides of the recording layer, at least one of the supports is configured to be transparent so as to transmit active energy rays (excitation light, reference light, reproduction light, etc.). In the case of a hologram recording medium having a support on one or both sides of the recording layer, a transmission type or reflection type hologram can be recorded. When a support having reflective properties is used on one side of the recording layer, a reflective hologram can be recorded.
- the support may be provided with patterning for data addressing.
- patterning method there are no restrictions on the patterning method in this case, but for example, unevenness may be formed on the support itself, a pattern may be formed on the reflective layer described below, or a combination of these methods may be used.
- the protective layer is a layer for preventing the effects of oxygen and moisture on the recording layer, such as a decrease in sensitivity and deterioration of storage stability.
- the protective layer is a layer for preventing the effects of oxygen and moisture on the recording layer, such as a decrease in sensitivity and deterioration of storage stability.
- a layer made of a water-soluble polymer, an organic/inorganic material, etc. can be formed as a protective layer.
- the formation position of the protective layer is not particularly limited, and may be formed, for example, on the surface of the recording layer or between the recording layer and the support.
- the protective layer may be formed on the outer surface of the support.
- a protective layer may be formed between the support and other layers.
- the reflective layer is formed when the medium is configured as a reflective hologram recording medium.
- the reflective layer may be formed between the support and the recording layer, or on the outer surface of the support. Usually, it is preferable that the reflective layer is between the support and the recording layer. Any known reflective layer can be used as the reflective layer. For example, a thin metal film or the like can be used.
- an anti-reflection layer is provided on the side where the object light and readout light enter and exit, or between the recording layer and the support.
- a membrane may also be provided.
- the antireflection film functions to improve light utilization efficiency and suppress the generation of ghost images. Any known antireflection film can be used.
- ⁇ Method for manufacturing hologram recording medium There are no limitations to the method of manufacturing the hologram recording medium of the present invention. For example, it can be manufactured by coating the composition for a holographic recording medium of the present invention on a support without a solvent to form a recording layer. Any method can be used to apply the composition for holographic recording media. Specific examples include a spray method, a spin coating method, a wire bar method, a dip method, an air knife coating method, a roll coating method, a blade coating method, and a doctor roll coating method.
- composition for hologram recording media of the present invention when forming a recording layer, especially when forming a thick recording layer, there are methods in which the composition for hologram recording media of the present invention is placed in a mold and molded, or it is coated on a release film and molded. A punching method may also be used.
- a coating solution may be prepared by mixing the composition for a holographic recording medium of the present invention with a solvent or an additive, and this may be coated onto a support and dried to form a recording layer.
- any method can be used as the coating method, for example, the same method as described above can be employed.
- solvents include ketone solvents such as acetone and methyl ethyl ketone; aromatic solvents such as toluene and xylene; alcohol solvents such as methanol and ethanol; ketone alcohol solvents such as diacetone alcohol; and ether solvents such as tetrahydrofuran.
- Solvents Halogenated solvents such as dichloromethane and chloroform; Cellosolved solvents such as methyl cellosolve and ethylcellosolve; Propylene glycol solvents such as propylene glycol monomethyl ether and propylene glycol monoethyl ether; Ethyl acetate, methyl 3-methoxypropionate, etc.
- Ester solvents include Perfluoroalkyl alcohol solvents such as tetrafluoropropanol; Highly polar solvents such as dimethylformamide and dimethyl sulfoxide; Chain hydrocarbon solvents such as n-hexane; Cyclic hydrocarbon solvents such as cyclohexane and cyclooctane ; or a mixed solvent thereof.
- one type of solvent may be used alone, or two or more types may be used in combination in any combination and ratio.
- the hologram recording of the present invention can be performed by, for example, an injection molding method, a sheet molding method, a hot press method, etc.
- the recording layer can be formed by molding the medium composition.
- the resin matrix consisting of components (a) and (b) is photocurable or thermosetting with few volatile components
- the composition for holographic recording media of the present invention can be prepared by, for example, reaction injection molding or liquid injection molding.
- the recording layer can be formed by molding. In this case, if the molded body has sufficient thickness, rigidity, strength, etc., the molded body can be used as a hologram recording medium as it is.
- methods for producing hologram recording media include, for example, a method in which a composition for a hologram recording medium melted by heat is coated on a support, and the composition is cooled and solidified to form a recording layer; A method of manufacturing a recording layer by applying a composition for media to a support and curing it by thermal polymerization, and a method of manufacturing by applying a liquid composition for hologram recording media to a support and curing by photopolymerizing. There is also a method of manufacturing the recording layer by forming the recording layer.
- the holographic recording medium thus produced can take the form of a free-standing slab or disk, and can be used in three-dimensional image display devices, diffractive optical elements, large-capacity memories, and more.
- the hologram recording medium of the present invention using the composition for a hologram recording medium of the present invention has a high ⁇ n, can reduce color unevenness, and can improve brightness, and can be used as a light guide plate for AR glasses. It is useful as
- Writing (recording) and reading (reproducing) information to the hologram recording medium of the present invention are both performed by irradiation with light.
- the object light and the reference light are irradiated onto the recording layer so that the object light and the reference light interfere in the recording layer.
- the interference light causes polymerization and concentration change of the polymerizable monomer in the recording layer, and as a result, interference fringes cause a refractive index difference in the recording layer, resulting in interference recorded in the recording layer.
- the stripes are recorded as a hologram in the recording layer.
- the recording layer is irradiated with a predetermined reproduction light (usually a reference light).
- the irradiated reproduction light is diffracted according to the interference fringes. Since this diffracted light contains the same information as that of the recording layer, the information recorded on the recording layer can be reproduced by reading the diffracted light with an appropriate detection means.
- the wavelength regions of the object light, reproduction light, and reference light are arbitrary depending on their respective uses, and may be in the visible light region or the ultraviolet region.
- suitable ones include, for example, solid lasers such as ruby, glass, Nd-YAG, and Nd- YVO4 ; diode lasers such as GaAs, InGaAs, and GaN; helium-neon, argon, krypton, excimer, Examples include gas lasers such as CO2 ; lasers with excellent monochromaticity and directivity, such as dye lasers having dyes; and the like.
- the irradiation amount of the object light, reproduction light, and reference light there is no limit to the irradiation amount of the object light, reproduction light, and reference light, and the irradiation amount is arbitrary as long as recording and reproduction are possible.
- the irradiation dose is extremely small, the chemical change of the polymerizable monomer may be too incomplete and the heat resistance and mechanical properties of the recording layer may not be sufficiently developed.
- the irradiation dose is extremely large, the components of the recording layer (components of the composition for a holographic recording medium of the present invention) may deteriorate.
- the object beam, the reproduction beam, and the reference beam are usually 0.00, depending on the composition of the holographic recording medium composition of the present invention used to form the recording layer, the type and amount of the photopolymerization initiator, etc. Irradiation is performed in a range of 1 J/cm 2 or more and 20 J/cm 2 or less.
- Examples of the hologram recording method include a polarized collinear hologram recording method and a reference beam incident angle multiplexed hologram recording method.
- the hologram recording medium of the present invention is used as a recording medium, it is possible to provide good recording quality with any recording method.
- a volume hologram is recorded on the hologram recording medium of the present invention in the same manner as in the aforementioned large-capacity memory application.
- a predetermined reproduction light is irradiated onto the recording layer.
- the irradiated reproduction light is diffracted according to the interference fringes.
- the corresponding interference fringes are recorded according to the wavelength and incidence angle of the reproduced light to be diffracted, it is possible to cause diffraction for the reproduced light in a wide wavelength range, and the display color gamut of AR glasses can be increased. Can be expanded.
- the wavelength range of the object light and the reproduction light is arbitrary depending on the respective uses, and may be in the visible light range or the ultraviolet range. Among these lights, the above-mentioned laser and the like are preferable.
- the reproduction light is not limited to lasers and the like, and display devices such as liquid crystal displays (LCDs) and organic electroluminescent displays (OLEDs) are also suitable.
- the irradiation amount of the object light, reproduction light, and reference light there is no limit to the irradiation amount of the object light, reproduction light, and reference light, and the irradiation amount is arbitrary as long as recording and reproduction are possible.
- the irradiation dose is extremely small, the chemical change of the polymerizable monomer may be too incomplete and the heat resistance and mechanical properties of the recording layer may not be sufficiently developed.
- the irradiation dose is extremely large, the components of the recording layer (components of the composition for a holographic recording medium of the present invention) may deteriorate.
- the object beam, the reproduction beam, and the reference beam are usually 0.00, depending on the composition of the holographic recording medium composition of the present invention used to form the recording layer, the type and amount of the photopolymerization initiator, etc. Irradiation is performed in a range of 1 J/cm 2 or more and 20 J/cm 2 or less.
- PCL-204HGT Polycaprolactone diol (molecular weight 400) (manufactured by Daicel)
- PCL-205U Polycaprolactone diol (molecular weight 530) (manufactured by Daicel)
- PCL-305 Polycaprolactone triol (molecular weight 550) (manufactured by Daicel)
- HHM303 2-[[2,2-bis[(2-dibenzothiophen-4-ylphenyl)sulfanylmethyl]-3-(1,3-benzothiazo-2-lylsulfanylmethyl)propoxy]carbonylamino]ethyl acrylate (molecular weight 975)
- Photopolymerization initiator/HLI02 1-(9-ethyl-6-cyclohexanoyl-9H-carbazol-3-yl)-1-(O-acetyloxime) methyl glutarate (molecular weight 505)
- Component (e) Compound having an isocyanate-reactive functional group and a nitroxyl radical group - 4-hydroxy-2,2,6,6-tetramethylpiperidine-1-oxyl free radical (TEMPOL): Manufactured by Tokyo Kasei Co., Ltd.
- Component (f) Octylic acid solution of curing catalyst/tris(2-ethylhexanoate) bismuth (active ingredient amount 56% by weight)
- Example 1 0.8541 g of polymerizable monomer HLM303, 0.0274 g of photoinitiator HLI02, and 0.0103 g of TEMPOL were dissolved in 0.8470 g of Duranate TM TSS-100 and 1.9764 g of Duranate TM A201H. Thereto, 0.7618 g of PCL-204HGT and 1.4148 g of PCL-305 were mixed, and 0.0005 g of an octylic acid solution of tris(2-ethylhexanoate) bismuth was dissolved and mixed with stirring.
- a sample for evaluating a composition for a holographic recording medium was prepared by heating.
- a recording layer with a thickness of 0.5 mm was formed between slide glasses serving as covers.
- Example 2 Polymerizable monomer HLM201: 0.6306 g, photoinitiator HLI02: 0.0227 g, and TEMPOL: 0.0085 g were dissolved in 1.7661 g of Duranate TM TSS-100 and 1.1774 g of Tronate XFLO100. Thereto, 0.2057 g of PCL-205U and 1.8509 g of PCL-305 were mixed with stirring. An evaluation sample was prepared in the same manner as in Example 1 using the mixed solution.
- DuranateTM TSS-100 is a mixture of difunctional and trifunctional isocyanate compounds, it cannot be determined by calculation from the NCO value. Therefore, the amount of allophanate binding units (mol/g) was calculated using the procedure described below. Benzylamine: 10 mg/1 mL (acetonitrile) was added to DuranateTM TSS-100: 5 mg/1 mL (acetonitrile), and the mixture was reacted at room temperature for 30 minutes. DMF (3 mL) was added to this to dissolve the precipitated components and a sample was analyzed by LC/MS. The LC/MS conditions are as shown in Table 1 below. From the obtained spectrum, the amount of allophanate binding units present (mol/g) was determined from the ratio of the peak area of all components to the peak area of the allophanate binding unit-containing structure.
- Duranate TM TUL-100 and Takenate 600 are isocyanate compounds that do not contain allophanate linking units.
- hologram recording and evaluation method Using the composition evaluation samples for hologram recording media produced in Examples and Comparative Examples, hologram recording and evaluation of the hologram recording performance of the hologram recording medium were performed according to the procedure described below.
- the hologram recording was performed using a semiconductor laser with a wavelength of 405 nm and an exposure apparatus shown in FIG. 1 with an exposure power density of 10 mW/cm 2 per beam to perform two-beam plane wave hologram recording. This will be explained in detail below.
- FIG. 1 is a block diagram showing an outline of an apparatus used for transmission hologram recording.
- FIG. 2 is a block diagram showing an outline of the apparatus used for recording the reflection hologram.
- S is a sample of a hologram recording medium.
- M1, M2 and M3 all represent mirrors.
- CS is an exposure time control shutter.
- BS is a beam shutter.
- PBS is a polarizing beam splitter.
- the LED is a light source for post-exposure (LED with a center wavelength of 405 nm manufactured by THORLAB).
- LD indicates a recording laser light source that emits light with a wavelength of 405 nm (a single mode laser manufactured by TOPTICA Photonics that can obtain light around a wavelength of 405 nm).
- PD1 and PD2 indicate photodetectors.
- Transmission hologram recording exposure the light with a wavelength of 405 nm generated from the LD is split by the PBS, and these are considered as object light (M1 side) and reference light (M2 side), and the angle between the two beams is 59.
- the irradiation was performed so as to cross the recording surface at an angle of 3°.
- the bisector of the angle formed by the two beams (hereinafter referred to as the optical axis) is made perpendicular to the recording surface of the recording layer of the hologram recording medium S, and the The plane of vibration of the electric field vectors of the two beams was made perpendicular to the plane containing the two intersecting beams.
- the sample rotation angle was set to 0°, and 181 multiple recording exposures were performed on the same location while changing the sample rotation angle by 0.2° from ⁇ 18° to +18°. At this time, recording exposure was carried out equally so that the total recording energy was 2 J/cm 2 in all Examples and Comparative Examples so that the amounts of polymerizable monomer and photopolymerization initiator consumed for recording were equal. Ta.
- Reflectid hologram recording exposure the light with a wavelength of 405 nm generated from the LD is split by the PBS, and these are regarded as the object light (M1-M3 side) and the reference light (M2 side), and the angle between the two beams is The light was irradiated so as to cross the recording surface at an angle of 127°.
- the sample rotation angle of 0° was the same as that used in the transmission hologram recording exposure device, and 161 multiple recording exposures were performed on the same location while changing the orientation of the hologram recording medium S from -24° to +29°. .
- recording exposure was carried out equally so that the total recording energy was 2 J/cm 2 in all Examples and Comparative Examples. Ta.
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Abstract
Description
この際、グレーティングピッチが狭い場合も広い場合も、等しく重合反応が進みホログラムが形成されることが望ましい。しかし、本発明者の検討の結果、媒体によっては形成されるホログラム性能がグレーティングピッチによって変わってしまうという問題が判明した。
即ち、本発明は以下を要旨とする。
成分(a):イソシアネート基を有する化合物
成分(b):イソシアネート反応性官能基を有する化合物
成分(c):重合性モノマー
成分(d):光重合開始剤
成分(e):ニトロキシルラジカル基を有する化合物
成分(f):硬化触媒
本発明のホログラム記録媒体用組成物は、下記成分(a)~(d)を含有し、成分(a)と成分(b)の合計重量に対する、成分(a)に含まれるアロファネート結合ユニットの存在量が6.5×10-4mol/g以上であることを特徴とする。
成分(a):イソシアネート基を有する化合物
成分(b):イソシアネート反応性官能基を有する化合物
成分(c):重合性モノマー
成分(d):光重合開始剤
成分(a)のイソシアネート基を有する化合物は、好ましくは後述の硬化触媒(成分(f))の存在下で、イソシアネート反応性官能基を有する化合物(成分(b))と反応し、樹脂マトリックスを構成する成分である。
(42×イソシアネート基の数/イソシアネート基を有する化合物の分子量)×100
これらは何れか1種を単独で使用してもよく、2種以上を任意の組み合わせ及び比率で併用してもよい。
直鎖状の1価脂肪族アルコールとしては、例えば、炭素数1~20の直鎖状1価脂肪族アルコールが挙げられる。炭素数1~20の直鎖状1価脂肪族アルコールとしては、例えば、メタノール、エタノール、n-プロパノール、n-ブタノール、n-ペンタノール、n-ヘキサノール、n-ヘプタノール、n-オクタノール、n-ノナノール、n-デカノール、n-ウンデカノール、n-ドデカノール(ラウリルアルコール)、n-トリデカノール、n-テトラデカノール、n-ペンタデカノール、n-ヘキサデカノール、n-ヘプタデカノール、n-オクタデカノール(ステアリルアルコール)、n-ノナデカノール、および、エイコサノールが挙げられる。
分岐状の1価脂肪族アルコールとしては、例えば、炭素数3~20の分岐状1価脂肪族アルコールが挙げられる。炭素数3~20の分岐状1価脂肪族アルコールとしては、例えば、イソプロパノール、イソブタノール(イソブチルアルコール)、sec-ブタノール、tert-ブタノール、イソペンタノール、イソヘキサノール、イソヘプタノール、イソオクタノール、2-エチルヘキサノール、イソノナノール、イソデカノール、5-エチル-2-ノナノール、トリメチルノニルアルコール、2-ヘキシルデカノール、3,9-ジエチル-6-トリデカノール、2-イソヘプチルイソウンデカノール、および、2-オクチルドデカノールが挙げられる。
これらは何れか1種を単独で使用してもよく、2種以上を任意の組み合わせ及び比率で併用してもよい。
アロファネート結合ユニットの存在量が、以下の範囲であれば、イソシアネート基を有する化合物として、アロファネート結合ユニットを含むイソシアネート基を有する化合物のみを用いてもよく、アロファネート結合ユニットを含むイソシアネート基を有する化合物とアロファネート結合ユニットを含まないイソシアネート基を有する化合物とを併用してもよい。
一方、成分(a)のイソシアネート基を有する化合物に含まれるアロファネート結合ユニットの存在量は、成分(a)と成分(b)の合計重量に対するモル比で、2.0×10-3mol/g以下であることが好ましく、より好ましくは1.8×10-3mol/g以下、さらに好ましくは1.5×10-3mol/g以下である。アロファネート結合ユニットの存在量が上記の上限値以下であれば、後述の重合性モノマー(成分(c))のマトリックスとの親和性が向上し、ホログラム記録媒体とした際に濁りが生じにくくなる。
成分(b)のイソシアネート反応性官能基を有する化合物とは、成分(a)のイソシアネート基を有する化合物との鎖延長反応に関与する活性水素(イソシアネート反応性官能基)を有する化合物である。イソシアネート反応性官能基としては例えば、水酸基、アミノ基、メルカプト基が挙げられる。イソシアネート反応性官能基を有する化合物は分子内にイソシアネート反応性官能基を1つ有するものであってもよく、2つ以上を有するものであってもよいが、2つ以上有することが好ましい。なお、2つ以上のイソシアネート反応性官能基を有する場合には、1つの分子に含まれるイソシアネート反応性官能基は1種類であってもよく、また複数種類であってもよい。
イソシアネート反応性官能基として水酸基を有する化合物は1分子中に水酸基を1つ以上有するものであればよいが、2つ以上の水酸基を有するものが好ましい。その例として、エチレングリコール、トリエチレングリコール、ジエチレングリコール、ポリエチレングリコール、プロピレングリコール、ポリプロピレングリコール(PPG)、ネオペンチルグリコール等のグリコール類;ブタンジオール、ペンタンジオール、ヘキサンジオール、ヘプタンジオール、テトラメチレングリコール(TMG)、ポリテトラメチレングリコール(PTMG)等のジオール類;ビスフェノール類;グリセリン、トリメチロールプロパン、ブタントリオール、ペンタントリオール、ヘキサントリオール、デカントリオール等のトリオール類;これらの多官能アルコールをポリエチレンオキシ鎖やポリプロピレンオキシ鎖で修飾した化合物;多官能ポリオキシブチレン;多官能ポリカプロラクトン;多官能ポリエステル;多官能ポリカーボネート;多官能ポリプロピレングリコールなどが挙げられる。これらは何れか1種を単独で使用してもよく、2種以上を任意の組み合わせ及び比率で併用してもよい。
イソシアネート反応性官能基としてアミノ基を有する化合物は1分子中にアミノ基を1つ以上有するものであればよいが、2つ以上のアミノ基を有するものが好ましい。その例としては、エチレンジアミン、ジエチレントリアミン、トリエチレンテトラミン、ヘキサメチレンジアミンなどの脂肪族アミン;イソホロンジアミン、メンタンジアミン、4,4’-ジアミノジシクロヘキシルメタンなどの脂環族アミン;m-キシリレンジアミン、ジアミノジフェニルメタン、m-フェニレンジアミンなどの芳香族アミン;等が挙げられる。これらは何れか1種を単独で使用してもよく、2種以上を任意の組み合わせ及び比率で併用してもよい。
イソシアネート反応性官能基としてメルカプト基を有する化合物は1分子中にメルカプト基を1つ以上有するものであればよいが、2つ以上のメルカプト基を有するものが好ましい。その例としては、1,3-ブタンジチオール、1,4-ブタンジチオール、2,3-ブタンジチオール、1,2-ベンゼンジチオール、1,3-ベンゼンジチオール、1,4-ベンゼンジチオール、1,10-デカンジチオール、1,2-エタンジチオール、1,6-ヘキサンジチオール、1,9-ノナンジチオール、ペンタエリスリトールテトラキス(3-メルカプトプロピオネート)、ペンタエリスリトールテトラキス(2-メルカプトアセテート)、ペンタエリスリトールテトラキス(3-メルカプトブチレート)、トリメチロールプロパントリス(3-メルカプトプロピオネート)、ジペンタエリスリトールヘキサキス(3-メルカプトプロピオネート)、1,4-ビス(3-メルカプトブチリルオキシ)ブタン等が挙げられる。これらは何れか1種を単独で使用してもよく、2種以上を任意の組み合わせ及び比率で併用してもよい。
成分(b)として用いるポリカプロラクトン類としては、例えば、エチレングリコール、ジエチレングリコール、トリエチレングリコール、プロピレングリコール、ジプロピレングリコール、1,3-ブタンジオール、1,4-ブタンジオール、ヘキサメチレングリコール、メチルペンタンジオール、2,4-ジエチルペンタンジオール、ネオペンチルグリコール、2-エチル-1,3-ヘキサンジオール、トリメチロールプロパン、ジトリメチロールプロパン、ペンタエリスリトール、ジペンタエリスリトール等の多価アルコールやポリプロピレングリコール、ポリテトラメチレングリコール(PTMG)等のジオール類の存在下でε-カプロラクトンを開環重合して得られるポリカプロラクトンポリオール(ポリカプロラクトンジオール、ポリカプロラクトントリオールなど)等が挙げられる。これらは何れか1種を単独で使用してもよく、2種以上を任意の組み合わせ及び比率で併用してもよい。
成分(c)の重合性モノマーとは後述の成分(d)の光重合開始剤によって重合され得る化合物であり、これは、記録時および/または後露光時において重合されるモノマー化合物である。
カチオン重合性モノマーの例としては、エポキシ化合物、オキセタン化合物、オキソラン化合物、環状アセタール化合物、環状ラクトン化合物、チイラン化合物、チエタン化合物、ビニルエーテル化合物、スピロオルソエステル化合物、エチレン性不飽和結合化合物、環状エーテル化合物、環状チオエーテル化合物、ビニル化合物等が挙げられる。上記のカチオン重合性モノマーは、何れか1種を単独で使用してもよく、2種以上を任意の組み合わせ及び比率で併用してもよい。
アニオン重合性モノマーの例としては、炭化水素モノマー、極性モノマー等が挙げられる。
炭化水素モノマーの例としては、スチレン、α-メチルスチレン、ブタジエン、イソプレン、ビニルピリジン、ビニルアントラセン、およびこれらの誘導体等が挙げられる。
極性モノマーの例としては、メタクリル酸エステル類、アクリル酸エステル類、ビニルケトン類、イソプロペニルケトン類、その他の極性モノマーなどが挙げられる。
上記例示のアニオン重合性モノマーは、何れか1種を単独で使用してもよく、2種以上を任意の組み合わせ及び比率で併用してもよい。
ラジカル重合性モノマーの例としては、(メタ)アクリロイル基を有する化合物、(メタ)アクリルアミド類、ビニルエステル類、ビニル化合物、スチレン類、スピロ環含有化合物等が挙げられる。上記例示のラジカル重合性モノマーは、何れか1種を単独で使用してもよく、2種以上を任意の組み合わせ及び比率で併用してもよい。
本発明のホログラム記録媒体用組成物に用いる重合性モノマーは、通常分子量が80以上であり、好ましくは150以上、より好ましくは300以上である。また通常3000以下であり、好ましくは2500以下、より好ましくは2000以下である。分子量が上記の下限値以上であることで、ホログラムの情報記録時の光照射の重合に伴う収縮率を小さくすることができる。分子量が上記の上限値以下であることで、ホログラム記録媒体用組成物を用いた記録層中での重合性モノマーの移動度が高く、拡散が起こりやすくなり、十分な回折効率を得ることができる。
上記重合性モノマーは、ホログラム記録媒体への照射光波長(記録波長等)における屈折率が通常1.50以上、好ましくは1.52以上、さらに好ましくは1.55以上であり、通常1.80以下、好ましくは1.78以下である。屈折率が過度に小さいと回折効率が十分でなく、多重度が十分とならない場合がある。屈折率が過度に大きいと樹脂マトリックスとの屈折率差が大きくなりすぎて散乱が大きくなることにより透過度が低下して、記録や再生に際してより大きなエネルギーを要することになる。
屈折率は短い波長で評価すると大きい値を示すが、短波長で相対的に大きい屈折率を示すサンプルは、長波長でも相対的に大きい屈折率を示し、その関係が逆転することはない。従って、記録波長以外の波長で屈折率を評価し、記録波長での屈折率を予測することも可能である。
上記重合性モノマーは、ホログラムの記録波長における、モル吸光係数が100L・mol-1・cm-1以下であることが好ましい。モル吸光係数が100L・mol-1・cm-1以下であることにより、媒体の透過率が低くなることを防ぎ、厚みに対して十分な回折効率を得ることができる。
光重合開始剤とは、光によって化学反応を起こすカチオン、アニオン、ラジカルを発生するものをいい、上述の重合性モノマーの重合に寄与する。光重合開始剤の種類は特に制限はなく、重合性モノマーの種類等に応じて適宜選択することができる。
上記例示したカチオン光重合開始剤は、何れか1種を単独で使用してもよく、2種以上を任意の組み合わせ及び比率で併用してもよい。
上記例示したアニオン光重合開始剤は、何れか1種を単独で使用してもよく、2種以上を任意の組み合わせ及び比率で併用してもよい。
上記例示したラジカル光重合開始剤は、何れか1種を単独で使用してもよく、2種以上を任意の組み合わせ及び比率で併用してもよい。
本発明のホログラム記録媒体用組成物は、任意成分として、ニトロキシルラジカル基を有する化合物である成分(e)を含むことが好ましい。
成分(e)のニトロキシルラジカル基を有する化合物としては、好ましくはイソシアネート反応性官能基とニトロキシルラジカル基とを有する化合物が用いられる。本発明のホログラム記録媒体用組成物がこのような成分(e)を含むことで、成分(e)のイソシアネート反応性官能基が成分(a)のイソシアネート基と反応して樹脂マトリックスに固定化されると共に、成分(e)の含有するニトロキシルラジカル基により、記録感度を向上させて高いΔnを実現することができる。
ただし、成分(e)は何らこれらに限定されるものではない。
これらは何れか1種を単独で使用してもよく、2種以上を任意の組み合わせ及び比率で併用してもよい。
これらのニトロキシルラジカル基は安定ラジカル基であることが好ましい。
本発明のホログラム記録媒体用組成物は、成分(a)のイソシアネート基を有する化合物と成分(b)のイソシアネート反応性官能基を有する化合物との反応を促進する硬化触媒を成分(f)として更に含むことが好ましい。成分(f)の硬化触媒としては、ルイス酸として働くビスマス系触媒を用いることが好ましい。
ビスマス系触媒は、何れか1種を単独で使用してもよく、2種以上を任意の組み合わせ及び比率で併用してもよい。
これらは何れか1種を単独で使用してもよく、2種以上を任意の組み合わせ及び比率で併用してもよい。
本発明のホログラム記録媒体用組成物は上述の成分(a)~(f)以外に、本発明の主旨に反しない限り、その他の成分を含有することができる。
これらの成分はいずれか1種を単独で用いてもよく、2種以上を任意の組み合わせおよび比率で併用してもよい。
本発明のホログラム記録媒体用組成物における各成分の含有量は、本発明の主旨に反しない限り任意であるが、各成分の含有量は以下の範囲であることが好ましい。
成分(e)/成分(d)が上記下限以上であれば、成分(e)を含有することによるΔnの向上効果を有効に得ることができる。成分(e)/成分(d)が上記上限以下であれば、記録目的の露光時にラジカル重合反応を進行させて、回折格子の形成に必要な屈折率変調度を得、十分な記録感度を得ることができる。
本発明のホログラム記録媒体用組成物の製造に当たり、成分(a)~(d)、好ましくは成分(a)~(e)、より好ましくは成分(a)~(f)はどのような組み合わせ、順序で混合してもよく、またその際に、その他の成分を組み合わせて混合してもよい。
得られたホログラム記録媒体用組成物を硬化させることで、本発明のホログラム記録媒体用硬化物を得ることができる。
この際、硬化反応を促進するために30~100℃で1~72時間程度加熱してもよい。
本発明のホログラム記録媒体用硬化物に干渉露光することで、本発明のホログラム記録媒体を得ることができる。
本発明のホログラム記録媒体の記録層は、本発明のホログラム記録媒体用組成物により形成される層であり、情報が記録される層である。情報は通常、ホログラムとして記録される。後述の記録方法の項に詳述するとおり、該記録層中に含まれる重合性モノマーは、ホログラム記録などによってその一部が重合等の化学的な変化を生じるものである。従って、記録後のホログラム記録媒体においては、重合性モノマーの一部が消費され、重合体など反応後の化合物として存在する。
支持体は、媒体に必要な強度および耐久性を有しているものであれば、その詳細に特に制限はなく、任意の支持体を使用することができる。
支持体の形状にも制限は無いが、通常は平板状またはフィルム状に形成される。
支持体を構成する材料にも制限は無く、透明であっても不透明であってもよい。
これらの表面処理は、基板の気体や水分の透過性を制御する目的で行ってもよい。例えば記録層を挟む支持体にも気体や水分の透過性を抑制する働きを持たせることによりより一層媒体の信頼性を向上させることができる。
記録層の片側または両側に支持体を有するホログラム記録媒体の場合、透過型または反射型のホログラムが記録可能である。記録層の片側に反射特性を有する支持体を用いる場合は、反射型のホログラムが記録可能である。
保護層は、記録層の酸素や水分による感度低下や保存安定性の劣化等の影響を防止するための層である。保護層の具体的構成に制限は無く、公知のものを任意に適用することが可能である。例えば、水溶性ポリマー、有機/無機材料等からなる層を保護層として形成することができる。
保護層の形成位置は、特に制限はなく、例えば記録層表面や、記録層と支持体との間に形成してもよい。保護層は、支持体の外表面側に形成してもよい。保護層は支持体と他の層との間に形成してもよい。
反射層は、媒体を反射型のホログラム記録媒体として構成する際に形成される。反射型のホログラム記録媒体の場合、反射層は支持体と記録層との間に形成されていてもよく、支持体の外側面に形成されていてもよい。通常、反射層は、支持体と記録層との間にあることが好ましい。
反射層としては、公知のものを任意に適用することができる。例えば金属の薄膜等を用いることができる。
本発明における媒体を透過型および反射型の何れかのホログラム記録媒体として構成する際には、物体光および読み出し光が入射および出射する側や、あるいは記録層と支持体との間に、反射防止膜を設けてもよい。反射防止膜は、光の利用効率を向上させ、かつゴースト像の発生を抑制する働きをする。
反射防止膜としては、公知のものを任意に用いることができる。
本発明のホログラム記録媒体の製造方法に制限は無い。例えば、無溶剤で支持体上に本発明のホログラム記録媒体用組成物を塗布し、記録層を形成して製造することできる。
ホログラム記録媒体用組成物の塗布方法としては任意の方法を使用することができる。具体例を挙げると、スプレー法、スピンコート法、ワイヤーバー法、ディップ法、エアーナイフコート法、ロールコート法、及びブレードコート法、ドクターロールコート法などが挙げられる。
また、記録層の形成に際し、特に膜厚の厚い記録層を形成する場合、本発明のホログラム記録媒体用組成物を型に入れて成型する方法や、離型フィルム上に塗工して型を打ち抜く方法を用いることもできる。
また、本発明のホログラム記録媒体用組成物と溶剤又は添加剤とを混合して塗布液を調製し、これを支持体上に塗布、乾燥して記録層を形成して製造しても良い。この場合も塗布方法としては任意の方法を使用することができ、例えば、上述したのと同様の方法を採用することができる。
また、成分(a)及び(b)からなる樹脂マトリックスが揮発性成分の少ない光又は熱硬化性の場合は、例えば反応射出成形法、液体射出成形法によって本発明のホログラム記録媒体用組成物を成形して記録層を形成することができる。この場合、成形体が十分な厚み、剛性、強度などを有するならば、当該成形体をそのままホログラム記録媒体とすることができる。
特に本発明のホログラム記録媒体用組成物を用いた本発明のホログラム記録媒体は、高いΔnを有すると共に、色ムラを低減すると共に、輝度を向上させることができるものであり、ARグラス用導光板として有用である。
本発明のホログラム記録媒体に対する情報の書き込み(記録)および読み出し(再生)は、何れも光の照射によって行なわれる。
先ず、情報の記録時には、重合性モノマーの化学変化、すなわち、その重合および濃度変化を生じさせることが可能な光を、物体光として用いる。
本発明のホログラム記録媒体に対して、前述の大容量メモリ用途と同様にして体積ホログラムが記録される。
実施例、比較例及び参考例で用いた組成物原料は以下の通りである。
・デュラネートTMTSS-100:ヘキサメチレンジイソシアネート系ポリイソシアネート(NCO17.8%)(旭化成社製)
・デュラネートTMA201H:ヘキサメチレンジイソシアネート系ポリイソシアネート(NCO17.1%)(旭化成社製)
・デュラネートTMTUL-100:ヘキサメチレンジイソシアネート系ポリイソシアネート(NCO23.2%)(旭化成社製)
・トロネートXFLO100:ヘキサメチレンジイソシアネート系ポリイソシアネート(NCO12.1.%)(Vencorex社製)
・タケネート600:1,3-Bis(isocyanatomethyl)cyclohexane(NCO43.3%)(三井化学社製)
・PCL-204HGT:ポリカプロラクトンジオール(分子量400)(ダイセル社製)
・PCL-205U:ポリカプロラクトンジオール(分子量530)(ダイセル社製)
・PCL-305:ポリカプロラクトントリオール(分子量550)(ダイセル社製)
・HLM201:2-[[2,2-ビス(4-ジベンゾチオフェニルチオメチル)-3-(4-ジベンゾチオフェニルチオ)プロポキシ]カルボニルアミノ]エチルアクリレート(分子量872)
・HLM303:2-[[2,2-ビス[(2-ジベンゾチオフェン-4-イルフェニル)スルファニルメチル]-3-(1,3-ベンゾチアゾ-2-リルスルファニルメチル)プロポキシ]カルボニルアミノ]エチルアクリレート(分子量975)
・HLI02:1-(9-エチル-6-シクロヘキサノイル-9H-カルバゾール-3-イル)-1-(O-アセチルオキシム)グルタル酸メチル(分子量505)
・4-ヒドロキシ-2,2,6,6-テトラメチルピペリジン-1-オキシルフリーラジカル(TEMPOL):東京化成社製
・トリス(2-エチルヘキサノエート)ビスマスのオクチル酸溶液(有効成分量56重量%)
デュラネートTMTSS-100:0.8470gとデュラネートTMA201H:1.9764gに、重合性モノマーHLM303:0.8541g、光重合開始剤HLI02:0.0274g、TEMPOL:0.0103gを溶解させた。そこに、PCL-204HGT:0.7618gとPCL-305:1.4148gを混合し、トリス(2-エチルヘキサノエート)ビスマスのオクチル酸溶液:0.0005gを溶解させて撹拌混合した。
デュラネートTMTSS-100:1.7661gとトロネートXFLO100:1.1774gに、重合性モノマーHLM201:0.6306g、光重合開始剤HLI02:0.0227g、TEMPOL:0.0085gを溶解させた。そこに、PCL-205U:0.2057gとPCL-305:1.8509gを撹拌混合した。
混合した溶液を用いて、実施例1と同様に評価用サンプルを作製した。
デュラネートTMTSS-100:2.5365gに、重合性モノマーHLM303:0.8727g、光重合開始剤HLI02:0.0274g、TEMPOL:0.0103gを溶解させた。そこに、PCL-205U:1.6013gとPCL-305:0.8622gを混合し、トリス(2-エチルヘキサノエート)ビスマスのオクチル酸溶液:0.0002gを溶解させて撹拌混合した。
混合した溶液を用いて、実施例1と同様に評価用サンプルを作製した。
デュラネートTMTSS-100:2.1080gとタケネート600:0.3720gに、重合性モノマーHLM303:0.7697g、光重合開始剤HLI02:0.0242g、TEMPOL:0.0091gを溶解させた。そこに、PCL-204HGT:2.2680gとPCL-305:0.2520gを混合し、トリス(2-エチルヘキサノエート)ビスマスのオクチル酸溶液:0.0002gを溶解させて撹拌混合した。
混合した溶液を用いて、実施例1と同様に評価用サンプルを作製した。
デュラネートTMTUL-100:2.3419gに、重合性モノマーHLM201:0.6306g、光重合開始剤HLI02:0.0227g、TEMPOL:0.0085gを溶解させた。そこに、PCL-204HGT:2.1264gとPCL-205U:0.5316gを溶解させて撹拌混合し、トリス(2-エチルヘキサノエート)ビスマスのオクチル酸溶液:0.0001gを溶解させて撹拌混合した。
混合した溶液を用いて、実施例1と同様に評価用サンプルを作製した。
実施例及び比較例で用いた成分(a)のイソシアネート基を有する化合物中のアロファネート結合ユニット存在量(mol/g)は以下に説明する手順で計算した。
デュラネートTMA201HとトロネートXFLO100はアロファネート結合ユニットをもつ2官能のイソシアネート化合物であり、NCO価から下記式を用いてアロファネート結合ユニット存在量(mol/g)を求めた。
NCO価/(42×イソシアネート基の数×100)
デュラネートTMTSS-100:5mg/1mL(アセトニトリル)に、ベンジルアミン:10mg/1mL(アセトニトリル)を加え室温で30分反応させた。これにDMF(3mL)を加えて析出成分を溶かしサンプルとし、LC/MSによる分析を実施した。LC/MSの条件は下記表1に示すとおりである。得られたスペクトルから、全成分のピーク面積とアロファネート結合ユニット含有構造のピーク面積の比より、アロファネート結合ユニット存在量(mol/g)を求めた。
実施例及び比較例で作製されたホログラム記録媒体用組成物評価用サンプルを使用して、以下に説明する手順でホログラム記録と、ホログラム記録媒体のホログラム記録性能の評価を実施した。
ホログラム記録は、波長405nmの半導体レーザーを用いて、ビーム1本あたりの露光パワー密度10mW/cm2で図1に示す露光装置を使用して、二光束平面波のホログラム記録を行った。
以下詳細に説明する。
図1は透過のホログラム記録に用いた装置の概要を示す構成図である。図2は反射のホログラム記録に用いた装置の概要を示す構成図である。
透過のホログラム記録露光では、LDから発生した波長405nmの光をPBSにより分割し、それらを物体光(M1側)および参照光(M2側)とみなして、2本のビームのなす角が59.3°になるように記録面上にて交差するように照射した。このとき、2本のビームのなす角の2等分線(以下、光軸と記載)がホログラム記録媒体Sの記録層の記録面に対して垂直になるようにし、更に、分割によって得られた2本のビームの電場ベクトルの振動面は、交差する2本のビームを含む平面と垂直になるようにした。
上記の場合をサンプル回転角0°とし、-18°から+18°まで、サンプル回転角を0.2°ずつ変えながら、同一箇所に181多重の記録露光を行った。このとき、記録に消費される重合性モノマーと光重合開始剤の量が等しくなるように、すべての実施例および比較例において、総記録エネルギーが2J/cm2となるように等しく記録露光を行った。
反射のホログラム記録露光では、LDから発生した波長405nmの光をPBSにより分割し、それらを物体光(M1-M3側)および参照光(M2側)とみなして、2本のビームのなす角が127°になるように記録面上にて交差するように照射した。サンプル回転角0°については、透過のホログラム記録露光の装置のときと共通とし、ホログラム記録媒体Sの向きを-24°から+29まで角度を変えながら、同一箇所に161多重の記録露光を行った。このとき、記録に消費される重合性モノマーと光重合開始剤の量が等しくなるように、すべての実施例および比較例において、総記録エネルギーが2J/cm2となるように等しく記録露光を行った。
多重記録露光後、前記回転角度を0°に戻し、暗状態で120秒の信号成長時間を待ち、ポスト露光用光源LEDを4J/cm2照射して記録の固定化を行った。
図1および図2の物体光側のビームシャッターBSを閉じて、ミラーM2側の参照光を照射して、記録したホログラムの再生を行った。PD1に検出される光強度を回折光Idi、PD2に検出される光強度を透過光Itiとして、下記式(1)より多重記録した各干渉パターンから回折されたそれぞれの光の回折効率ηiの値を求めた。下記式(2)及び式(3)より透過の累積ΔnTおよび反射の累積ΔnRを計算した。
実施例1、2ではアロファネート結合ユニット存在量が6.5×10-4mol/g以上であり、十分な量のアロファネート結合ユニットが媒体内に含まれることが分かる。この時、(ΔnT-ΔnR)/ΔnR×100の値が10%以下であり、透過と反射のΔnの差が十分小さいこと、即ち、グレーティングピッチに依存しない記録性能安定性に優れることが示された。
比較例1~3ではアロファネート結合ユニット存在量が6.5×10-4mol/gより少ないか、アロファネート結合ユニットが存在せず、十分な量のアロファネート結合ユニットが媒体内に含まれていないことが分かる。この時、(ΔnT-ΔnR)/ΔnR×100の値が15%以上であり、透過と反射のΔnの差が大きいこと、即ち、グレーティングピッチに依存して記録性能の安定性に劣ることが示された。
本出願は、2022年6月30日付で出願された日本特許出願2022-106253に基づいており、その全体が引用により援用される。
M1,M2,M3 ミラー
CS 露光時間制御シャッター
BS ビームシャッター
LED ポスト露光用光源
LD 記録光用レーザ光源
PD1,PD2 フォトディテクタ
PBS 偏光ビームスプリッタ
Claims (14)
- 下記成分(a)~(d)を含有し、成分(a)と成分(b)の合計重量に対する、成分(a)に含まれるアロファネート結合ユニットの存在量が6.5×10-4mol/g以上であることを特徴とするホログラム記録媒体用組成物。
成分(a):イソシアネート基を有する化合物
成分(b):イソシアネート反応性官能基を有する化合物
成分(c):重合性モノマー
成分(d):光重合開始剤 - 前記成分(c)の重合性モノマーが(メタ)アクリル系モノマーである、請求項1に記載のホログラム記録媒体用組成物。
- 前記成分(c)の重合性モノマーの分子量が300以上である、請求項1に記載のホログラム記録媒体用組成物。
- 前記組成物中の前記成分(c)の含有量が0.1重量%以上80重量%以下であり、前記成分(d)の含有量が前記成分(c)に対して0.1重量%以上20重量%以下である、請求項1に記載のホログラム記録媒体用組成物。
- さらに下記成分(e)を含む、請求項1に記載のホログラム記録媒体用組成物。
成分(e):ニトロキシルラジカル基を有する化合物 - 前記成分(e)がイソシアネート反応性官能基とニトロキシルラジカル基とを有する化合物である、請求項5に記載のホログラム記録媒体用組成物。
- 前記成分(e)が、4-ヒドロキシ-2,2,6,6-テトラメチルピペリジン-1-オキシルである、請求項6に記載のホログラム記録媒体用組成物。
- 前記組成物中の前記成分(e)と前記成分(d)のモル比(成分(e)/成分(d))が0.1以上10以下である、請求項5に記載のホログラム記録媒体用組成物。
- 前記組成物中の前記成分(a)と前記成分(b)の合計の含有量が0.1重量%以上99.9重量%以下であり、前記成分(a)に含まれるイソシアネート基数に対する前記成分(b)に含まれるイソシアネート反応性官能基数の比率が0.1以上10.0以下である、請求項1に記載のホログラム記録媒体用組成物。
- さらに下記成分(f)を含む、請求項1に記載のホログラム記録媒体用組成物。
成分(f):硬化触媒 - 請求項1に記載のホログラム記録媒体用組成物を硬化させてなるホログラム記録媒体用硬化物。
- 請求項11に記載のホログラム記録媒体用硬化物よりなる記録層と支持体とを有するホログラム記録媒体用積層体。
- 請求項11に記載のホログラム記録媒体用硬化物または請求項12に記載のホログラム記録媒体用積層体に露光してなるホログラム記録媒体。
- ARグラス導光板である請求項13に記載のホログラム記録媒体。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
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| CN202380047858.0A CN119422198A (zh) | 2022-06-30 | 2023-06-29 | 全息图像记录介质用组合物 |
| EP23831580.8A EP4550330A4 (en) | 2022-06-30 | 2023-06-29 | COMPOSITION FOR HOLOGRAPHIC RECORDING MEDIA |
| JP2024530963A JPWO2024005141A1 (ja) | 2022-06-30 | 2023-06-29 | |
| US18/999,485 US20250122326A1 (en) | 2022-06-30 | 2024-12-23 | Holographic recording medium composition |
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| US18/999,485 Continuation US20250122326A1 (en) | 2022-06-30 | 2024-12-23 | Holographic recording medium composition |
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| EP (1) | EP4550330A4 (ja) |
| JP (1) | JPWO2024005141A1 (ja) |
| CN (1) | CN119422198A (ja) |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012504665A (ja) * | 2008-10-01 | 2012-02-23 | バイエル・マテリアルサイエンス・アクチェンゲゼルシャフト | ホログラフィック媒体製造用のプレポリマー系ポリウレタン配合物 |
| JP2016517450A (ja) * | 2013-03-14 | 2016-06-16 | ヴェンコレックス・フランス | ポリアクリレートアロファネート |
| JP2016145352A (ja) * | 2009-11-03 | 2016-08-12 | コベストロ、ドイチュラント、アクチエンゲゼルシャフトCovestro Deutschland Ag | 感光性ポリマー組成物における添加剤としてのフルオロウレタン |
| WO2020032167A1 (ja) * | 2018-08-09 | 2020-02-13 | 三菱ケミカル株式会社 | ホログラム記録媒体用組成物及びホログラム記録媒体 |
| JP2022106253A (ja) | 2021-01-06 | 2022-07-19 | アウル株式会社 | プログラム、方法、情報処理装置、システム |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| PT2497085E (pt) * | 2009-11-03 | 2014-03-27 | Bayer Ip Gmbh | Processo para a produção de um filme holográfico |
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2023
- 2023-06-29 JP JP2024530963A patent/JPWO2024005141A1/ja active Pending
- 2023-06-29 CN CN202380047858.0A patent/CN119422198A/zh active Pending
- 2023-06-29 WO PCT/JP2023/024171 patent/WO2024005141A1/ja not_active Ceased
- 2023-06-29 EP EP23831580.8A patent/EP4550330A4/en active Pending
- 2023-06-30 TW TW112124504A patent/TW202409127A/zh unknown
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012504665A (ja) * | 2008-10-01 | 2012-02-23 | バイエル・マテリアルサイエンス・アクチェンゲゼルシャフト | ホログラフィック媒体製造用のプレポリマー系ポリウレタン配合物 |
| JP2016145352A (ja) * | 2009-11-03 | 2016-08-12 | コベストロ、ドイチュラント、アクチエンゲゼルシャフトCovestro Deutschland Ag | 感光性ポリマー組成物における添加剤としてのフルオロウレタン |
| JP2016517450A (ja) * | 2013-03-14 | 2016-06-16 | ヴェンコレックス・フランス | ポリアクリレートアロファネート |
| WO2020032167A1 (ja) * | 2018-08-09 | 2020-02-13 | 三菱ケミカル株式会社 | ホログラム記録媒体用組成物及びホログラム記録媒体 |
| JP2022106253A (ja) | 2021-01-06 | 2022-07-19 | アウル株式会社 | プログラム、方法、情報処理装置、システム |
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| TW202409127A (zh) | 2024-03-01 |
| EP4550330A4 (en) | 2025-10-15 |
| US20250122326A1 (en) | 2025-04-17 |
| EP4550330A1 (en) | 2025-05-07 |
| CN119422198A (zh) | 2025-02-11 |
| JPWO2024005141A1 (ja) | 2024-01-04 |
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