WO2011162393A1 - 光学フィルムとその製造方法 - Google Patents
光学フィルムとその製造方法 Download PDFInfo
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- WO2011162393A1 WO2011162393A1 PCT/JP2011/064588 JP2011064588W WO2011162393A1 WO 2011162393 A1 WO2011162393 A1 WO 2011162393A1 JP 2011064588 W JP2011064588 W JP 2011064588W WO 2011162393 A1 WO2011162393 A1 WO 2011162393A1
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- optical film
- aliphatic hydrocarbon
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/22—Absorbing filters
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/20—Filters
- G02B5/22—Absorbing filters
- G02B5/223—Absorbing filters containing organic substances, e.g. dyes, inks or pigments
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/0008—Organic ingredients according to more than one of the "one dot" groups of C08K5/01 - C08K5/59
- C08K5/0041—Optical brightening agents, organic pigments
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/29—Compounds containing one or more carbon-to-nitrogen double bonds
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/318—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of liquid crystal displays
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
- C09J2301/408—Additional features of adhesives in the form of films or foils characterized by the presence of essential components additives as essential feature of the adhesive layer
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2409/00—Presence of diene rubber
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2433/00—Presence of (meth)acrylic polymer
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2475/00—Presence of polyurethane
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J2483/00—Presence of polysiloxane
Definitions
- the present invention relates to an optical film and a manufacturing method thereof, and particularly to an optical film suitably used for an optical filter of a display device and a manufacturing method thereof.
- Near infrared rays are radiated from the plasma display panel (PDP) together with visible light.
- PDP plasma display panel
- near-infrared light is also used in home-use televisions, coolers, near-infrared remote controls for home appliances such as video decks, and other communication devices. May work.
- a near-infrared absorbing film is provided on the front surface (viewing side) of the plasma display panel, and the transmittance of near-infrared light, for example, from 850 nm to 1100 nm is set to 20% or less.
- Near-infrared absorbing film is generally a resin film containing a near-infrared absorbing pigment, and is optically attached to a transparent substrate such as a glass plate together with other functional films such as an antireflection film and an electromagnetic shielding film. Configure the filter.
- a transparent substrate such as a glass plate
- other functional films such as an antireflection film and an electromagnetic shielding film.
- Configure the filter is not necessarily excellent in productivity because it is necessary to separately provide an adhesive layer for attaching the optical filter in addition to the near-infrared absorbing film.
- near-infrared absorbing dyes include various dyes such as phthalocyanine-based, diimonium-based, polymethine-based, metal complex-based, squalium-based, cyanine-based, and indoaniline-based dyes. To diimmonium dyes.
- diimonium dyes generally have low heat resistance and moisture resistance, and are particularly susceptible to deterioration when included in the adhesive layer. Such deterioration of the dye not only lowers the near-infrared absorptivity, but also reduces optical properties such as visible transmittance. For this reason, it has also been proposed to suppress degradation by using a diimonium dye having a specific anion (see, for example, Patent Document 2).
- the present invention has been made to solve the above-described problems, and an object of the present invention is to provide an optical film in which deterioration of a diimonium dye in an adhesive layer is suppressed, and a method for producing the same.
- a base film and a lump formed on the base film and having a melting point of 200 ° C. or higher containing a diimonium compound represented by the following formula (1) in the pressure-sensitive adhesive are dispersed.
- An optical film comprising an adhesive layer.
- R 1 to R 8 each independently represent an unsubstituted or substituted identical or different aliphatic hydrocarbon group having 1 to 6 carbon atoms
- 4.9 of R 1 to R 8 ⁇ 8 is an aliphatic hydrocarbon group having 1 to 3 carbon atoms (a part of hydrogen atoms may be substituted with a halogen atom)
- X ⁇ represents (R 9 SO 2 ) 3 C —
- R 9 represents an unsubstituted or substituted aliphatic hydrocarbon group having 1 to 4 carbon atoms.
- the aliphatic hydrocarbon group having 1 to 3 carbon atoms is preferably a propyl group, and the other aliphatic hydrocarbon groups are preferably butyl groups.
- the method for producing an optical film of the present invention includes a mixing step of preparing a coating liquid by mixing a pressure-sensitive adhesive, a diimonium compound represented by the following formula (1), and a solvent capable of dissolving the diimonium compound, and the coating It has a coating process which applies a liquid on a substrate film and forms a coating layer, and a heating process which forms the adhesion layer by heating the coating layer to 100 ° C or more.
- R 1 to R 8 each independently represent an unsubstituted or substituted identical or different aliphatic hydrocarbon group having 1 to 6 carbon atoms
- 4.9 of R 1 to R 8 ⁇ 8 is an aliphatic hydrocarbon group having 1 to 3 carbon atoms (a part of hydrogen atoms may be substituted with a halogen atom)
- X ⁇ represents (R 9 SO 2 ) 3 C —
- R 9 represents an unsubstituted or substituted aliphatic hydrocarbon group having 1 to 4 carbon atoms.
- the pressure-sensitive adhesive is added and mixed.
- the solvent is preferably a ketone solvent.
- the optical film of the present invention is obtained by dispersing a diimonium compound having a specific structure, which is a diimonium dye, in an adhesive layer so as to form a lump having a melting point of 200 ° C. or higher. It is possible to obtain an optical film that is excellent in productivity, such as saving the labor of providing, and further suppresses deterioration of the diimonium compound in the adhesive layer.
- the dimonium compound having a specific structure after the dimonium compound having a specific structure is dissolved in a solvent, the dimonium compound having the specific structure has a melting point of 200 ° C or higher in the adhesive layer by heating to 100 ° C or higher.
- An optical film which is dispersed as a lump and whose deterioration is suppressed can be manufactured.
- the optical film of the present invention has a base film and an adhesive layer formed on the base film.
- a lump containing a diimonium compound represented by the following formula (1) (hereinafter simply referred to as a diimonium compound) having a melting point of 200 ° C. or higher is dispersed in the pressure-sensitive adhesive.
- R 1 to R 8 each independently represent an unsubstituted or substituted identical or different aliphatic hydrocarbon group having 1 to 6 carbon atoms
- 4.9 of R 1 to R 8 ⁇ 8 is an aliphatic hydrocarbon group having 1 to 3 carbon atoms (a part of hydrogen atoms may be substituted with a halogen atom)
- X ⁇ represents (R 9 SO 2 ) 3 C —
- R 9 represents an unsubstituted or substituted aliphatic hydrocarbon group having 1 to 4 carbon atoms.
- the present invention by using such a dimonium compound, it is possible to effectively suppress deterioration of the dimonium compound in the adhesive layer while omitting the conventional near-infrared absorbing film and improving the productivity.
- the diimonium compound of the formula (1) is used, and the block containing the diimonium compound having a melting point of 200 ° C. or more is dispersed in the adhesive layer, thereby effectively suppressing deterioration of the diimonium compound in the adhesive layer. can do.
- This lump may contain a small amount of an adhesive or the like as another component.
- R 1 to R 8 in Formula (1) exceeds 6 carbon atoms, or R 1 to R 8 having 1 to 3 carbon atoms is less than 4.9 groups, it will be described later.
- the production method cannot aggregate or crystallize the diimonium compound, and the mass containing the diimonium compound cannot have a melting point of 200 ° C. or higher, and as a result, the deterioration of the diimonium compound is suppressed.
- R 1 to R 8 are those having 1 to 6 carbon atoms, and those having 4.9 or more groups are having 1 to 3 carbon atoms, so that the mass containing the diimonium compound has a melting point of 200 ° C. or higher. Thus, deterioration can be suppressed.
- the number of groups having 1 to 3 carbon atoms (hereinafter referred to as the number of substituents) is not necessarily limited as long as it is 4.9 or more, and the upper limit of 8 groups, that is, all of R 1 to R 8 are 1 carbon atoms. May be up to 3.
- the number of substituents is preferably 7 or less, and more preferably 6 or less.
- the number of such substituents can be measured by high performance liquid chromatography. At this time, since the number of substituents to be measured is not necessarily uniform and has a certain distribution, the number of substituents having the highest distribution ratio is adopted in the present invention.
- the lump does not have a melting point, it indicates that the diimonium compound is contained in a substantially dissolved state in the lump.
- the lump has a melting point, it indicates that the diimonium compound is contained in the lump and is present in the lump.
- fusing point of the lump is 200 degreeC or more.
- the melting point of the mass is not necessarily limited as long as it is 200 ° C or higher, but is usually 250 ° C or lower, more preferably 240 ° C or lower, and further preferably 230 ° C or lower.
- the melting point of the massive body is preferably 1 to 20 ° C. lower, more preferably 2 to 10 ° C. lower and further preferably 3 to 8 ° C. lower than the melting point of the contained diimonium compound. It is preferable for the melting point to be in the above-mentioned range since the content of the dimonium compound in the mass is increased and deterioration of the dimonium compound can be suppressed.
- the melting point of the massive body can be measured using, for example, a differential scanning calorimeter.
- the aliphatic hydrocarbon group having 1 to 3 carbon atoms in R 1 to R 8 may be either an aliphatic hydrocarbon group having no substituent or an aliphatic hydrocarbon group having a substituent.
- the aliphatic hydrocarbon group having no substituent include linear and branched saturated aliphatic carbon groups such as a methyl group, an ethyl group, an n-propyl group, an i-propyl group, a vinyl group, an allyl group, and a propenyl group. Examples thereof include a hydrogen group or an unsaturated aliphatic hydrocarbon group.
- Examples of the aliphatic hydrocarbon group having a substituent include a 2-cyanoethyl group. Among these, n-propyl group, i-propyl group and the like are preferable, and all of R 1 to R 8 are preferably n-propyl group or i-propyl group.
- the aliphatic hydrocarbon group having 4 to 6 carbon atoms in R 1 to R 8 may be either an aliphatic hydrocarbon group having no substituent or an aliphatic hydrocarbon group having a substituent.
- Examples of the aliphatic hydrocarbon group having no substituent include linear or branched chain such as n-butyl group, i-butyl group, t-butyl group, n-pentyl group, i-pentyl group, and t-pentyl group.
- Examples of the aliphatic hydrocarbon group having a substituent include aliphatic hydrocarbon groups such as a 3-cyanopropyl group, a 4-cyanobutyl group, a 3-methoxypropyl group, and a 4-methoxybutyl group.
- X ⁇ is (R 9 SO 2 ) 3 C —
- R 9 is an unsubstituted or substituted aliphatic hydrocarbon group having 1 to 4 carbon atoms, such as a methyl group, a dichloromethyl group, Dibromomethyl group, difluoromethyl group, trifluoromethyl group, ethyl group, monofluoroethyl group, difluoroethyl group, trifluoroethyl group, tetrafluoroethyl group, pentafluoromethyl group, pentafluoropropyl group, hexafluoropropyl group, And saturated linear alkyl groups such as perfluorobutyl groups; unsaturated alkyl groups such as allyl groups, trifluoroethylene groups, and tetrafluoroallyl groups; branched alkyl groups such as isopropyl groups and pentafluoroisopropyl groups; and the like.
- those having a fluorine atom are preferable from the viewpoint of moisture resistance of the diimonium compound.
- difluoromethyl group, trifluoromethyl group, trifluoroethyl group, pentafluoroethyl group, tetrafluoropropyl group, heptafluoropropyl group, A fluorobutyl group and the like are preferable, and a trifluoromethyl group is particularly preferable.
- Such a diimonium compound can be synthesized, for example, as follows. That is, N, N, N ′, N′-tetrakis (p-aminophenyl) -p—obtained by reducing the Ullmann reaction product of p-phenylenediamine and 1-chloro-4-nitrobenzene. Phenylenediamine is dissolved in N, N-dimethylformamide, alkyl bromide is added thereto, and the mixture is reacted at 130 ° C. for 10 hours, for example.
- the number of substituents of the diimonium compound can be adjusted by appropriately selecting the number of carbon atoms of the brominated alkyl. For example, by using only a brominated alkyl having 1 to 3 carbon atoms, one having 8 substituents can be obtained. Further, by using a brominated alkyl having 1 to 3 carbon atoms and a brominated alkyl having 4 to 6 carbon atoms in combination, one having less than 8 substituents can be obtained.
- the reaction solution is filtered after cooling. Methanol is added to the filtrate and, for example, the mixture is stirred at 5 ° C. or lower for 1 hour, and then the produced crystal is filtered, washed with methanol, and dried.
- the obtained crystals are added to N, N-dimethylformamide and dissolved at, for example, 60 ° C., followed by addition of an aqueous tris (trifluoromethanesulfonyl) carbonic acid solution, and silver nitrate dissolved in N, N-dimethylformamide. For example, for about 30 minutes.
- the precipitated silver is filtered, and water is slowly added dropwise to the filtrate, followed by stirring for 15 minutes.
- the generated crystals are filtered, washed with water, and dried to obtain a diimonium compound.
- the adhesive layer may contain other near-infrared absorbing dyes having a maximum absorption wavelength ( ⁇ max ) in the range of 800 nm to 1100 nm as long as the effects of the present invention are not impaired.
- ⁇ max maximum absorption wavelength
- other near-infrared absorbing pigments include inorganic pigments, organic pigments, and organic dyes.
- Inorganic pigments include cobalt dyes, iron dyes, chromium dyes, titanium dyes, vanadium dyes, zirconium dyes, molybdenum dyes, ruthenium dyes, platinum dyes, ITO dyes, ATO dyes, etc. Is mentioned.
- organic pigments and organic dyes include diimonium dyes other than the aforementioned diimonium compounds, anthraquinone dyes, aminium dyes, cyanine dyes, merocyanine dyes, croconium dyes, squalium dyes, azurenium dyes, polymethines Dyes, naphthoquinone dyes, pyrylium dyes, phthalocyanine dyes, naphthalocyanine dyes, naphtholactam dyes, azo dyes, condensed azo dyes, indigo dyes, perinone dyes, perylene dyes, dioxazine dyes, quinacridones Dyes, isoindolinone dyes, quinophthalone dyes, pyrrole dyes, thioindigo dyes, metal complex dyes, dithiol metal complex dyes, indolephenol dyes, triallylmethane dyes, and the like.
- near-infrared absorbing dyes are particularly preferably dyes having a maximum absorption wavelength ( ⁇ max) in the range of 800 nm to 900 nm. By blending such a dye, a wide range of near infrared rays can be efficiently absorbed.
- the content of the dye in the adhesive layer is preferably 0.1 parts by mass to 20.0 parts by mass with respect to 100 parts by mass of the adhesive. More preferably, it is in the range of 0.01 to 15.0 parts by mass. Sufficient near-infrared absorbing ability can be obtained by making content of a pigment
- the proportion of the diimonium compound in the whole dye is preferably 50% by weight or more, more preferably 60% by weight or more, and further preferably 70% by weight or more in 100% by weight of the whole dye.
- color correction dyes having a maximum absorption wavelength in the range of 300 nm to 800 nm, leveling agents, antistatic agents, thermal stabilizers, antioxidants, dispersants , Flame retardants, lubricants, plasticizers, ultraviolet absorbers, and the like can be included.
- the ultraviolet absorber a benzotriazole-based ultraviolet absorber is preferable.
- the pressure-sensitive adhesive examples include acrylic pressure-sensitive adhesives, silicone-based pressure-sensitive adhesives, urethane-based pressure-sensitive adhesives, and butadiene-based pressure-sensitive adhesives. Among these, acrylic pressure-sensitive adhesives are preferably used.
- An acrylic adhesive is a polymer containing an acrylic monomer unit as a main component.
- the acrylic monomer includes (meth) acrylic acid, itaconic acid, (anhydrous) maleic acid, and (anhydrous) fumaric acid. Examples thereof include acids, crotonic acid, and alkyl esters thereof.
- (meth) acrylic acid is used as a general term for acrylic acid and methacrylic acid. The same applies to (meth) acrylate.
- the molecular weight of the acrylic pressure-sensitive adhesive is preferably in the range of 500,000 to 2,000,000 in terms of weight average molecular weight. If this weight average molecular weight is 500,000 or more, adhesion to an adherend and adhesion durability are sufficient, which is preferable. A viscosity of 2 million or less is preferable because the viscosity is moderate and the coated surface is excellent in smoothness. Moreover, it is not necessary to use a solvent to optimize the viscosity. In view of adhesion, adhesion durability, coating suitability, etc., the weight average molecular weight is preferably 500,000 to 2,000,000, and more preferably 500,000 to 1,000,000. In addition, the said weight average molecular weight is the value of polystyrene conversion measured by the gel permeation chromatography (GPC) method.
- GPC gel permeation chromatography
- alkyl esters of (meth) acrylic acid include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, n-butyl (meth) acrylate, n-pentyl (meth) acrylate, and n-hexyl (meth) ) Acrylate, n-heptyl (meth) acrylate, n-octyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, isononyl (meth) acrylate, n-decyl (meth) acrylate, isodecyl (meth) acrylate, etc. .
- the acrylic pressure-sensitive adhesive preferably has an acid value of 10 mgKOH / g or less.
- the acid value may be 0 mgKOH / g.
- the acid value is more preferably 7 mgKOH / g or less, and further preferably 5 mgKOH / g or less.
- the acid value here is a value obtained by titration of alcoholic potassium hydroxide (KOH) using phenolphthalein as an indicator.
- the copolymerization amount of acrylic acid may be adjusted so that the acid value is in the above range when the acrylic monomer is polymerized. Since the acrylic pressure-sensitive adhesive having an acid value of 10 mgKOH / g or less is commercially available, it can be appropriately selected and used.
- the glass transition point (Tg) of the acrylic pressure-sensitive adhesive in the present invention is preferably ⁇ 60 ° C. to 40 ° C., more preferably ⁇ 50 ° C. to 10 ° C.
- monomers other than acrylic monomers can be used.
- examples of other monomers used include vinyl esters such as vinyl acetate and vinyl propionate; olefins such as ethylene, propylene and isobutylene; halogenated olefins such as vinyl chloride and vinylidene chloride; styrene, ⁇ -methyl Styrene monomers such as styrene; Diene monomers such as butadiene, isoprene and chloroprene; Nitrile monomers such as acrylonitrile and methacrylonitrile; Acrylamide, N, N-dimethylacrylamide, N, N-dimethylmethacrylate Examples include acrylamide monomers such as amides. These may be used alone or in combination of two or more.
- acrylamide monomers are preferable from the viewpoint of obtaining an effect of promoting gelation of the pressure-sensitive adhesive layer.
- the content of the acrylamide monomer unit in the (meth) acrylic acid ester copolymer is preferably 0.05% by mass to 3% by mass, and 0.1% by mass with respect to the total amount of the pressure-sensitive adhesive. % To 2% by mass is more preferable.
- a monomer having a functional group for example, a hydroxy group, a glycidyl group, etc.
- a functional group for example, a hydroxy group, a glycidyl group, etc.
- examples of the monomer having a functional group that can serve as a crosslinking point include hydroxyethyl acrylate, hydroxyethyl methacrylate, glycidyl acrylate, glycidyl methacrylate, and the like.
- crosslinking agent When a monomer having such a crosslinking point is used, it is preferable to add a crosslinking agent.
- the cohesive force can be ensured by reacting a crosslinking agent with a crosslinking point to crosslink the polymer.
- cross-linking agents include melamine resins, urea resins, epoxy resins, metal oxides, metal salts, metal hydroxides, metal chelates, polyisocyanates, carboxy group-containing polymers, acid anhydrides, polyamines, and so on. It is suitably selected according to the type of functional group that can be obtained.
- an isocyanate-based crosslinking agent such as polyisocyanate is preferable.
- isocyanate crosslinking agent in the present invention examples include aromatic polyisocyanates such as tolylene diisocyanate, diphenylmethane diisocyanate, and xylylene diisocyanate, aliphatic polyisocyanates such as hexamethylene diisocyanate, isophorone diisocyanate, and hydrogenated diphenylmethane diisocyanate.
- aromatic polyisocyanates such as tolylene diisocyanate, diphenylmethane diisocyanate, and xylylene diisocyanate
- aliphatic polyisocyanates such as hexamethylene diisocyanate
- isophorone diisocyanate isophorone diisocyanate
- hydrogenated diphenylmethane diisocyanate A polyisocyanate etc. can be mentioned.
- denatured with low molecular active hydrogen containing compounds such as ethylene glycol, propylene glycol, neopentyl glycol, trimethylol propane, castor oil, can be mentioned.
- these isocyanate-based crosslinking agents may be used alone or in combination of two or more.
- trimethylolpropane-modified xylylene diisocyanate is preferably used when the pressure-sensitive adhesive layer to be formed is subjected to a heat load.
- [NCO] / [OH] (molar ratio), which is the ratio of the isocyanate group in the isocyanate-based crosslinking agent to the hydroxyl group in the acrylic pressure-sensitive adhesive ) Is preferably 0.05 to 2, more preferably 0.1 to 1.5, and still more preferably 0.2 to 1.2.
- [NCO] / [OH] within the above range, an appropriate cross-linked structure can be formed, a desired gel fraction can be obtained, and good re-peelability with no adhesive residue can be obtained. Further, it is preferable because an adhesive layer having good durability can be formed.
- the gel fraction of the pressure-sensitive adhesive layer is preferably 85% or more, more preferably 90% or more from the viewpoint of having good removability without causing adhesive residue and obtaining good durability. .
- the pressure-sensitive adhesive in the present invention preferably contains a silane coupling agent.
- the silane coupling agent is preferably used in order to attach the pressure-sensitive adhesive optical film of the present invention to the front display glass portion of the PDP with an appropriate adhesive force and to obtain good holding power and durability.
- silane coupling agent in the present invention an organosilicon compound having at least one alkoxysilyl group in the molecule can be preferably used.
- silane coupling agents include triethoxysilane, vinyltris (2-methoxyethoxy) silane, 3-methacryloxypropyltrimethoxysilane, 3-glycidoxypropyltrimethoxysilane, 2- (3,4- Epoxycyclohexyl) ethyltrimethoxysilane, 3-glycidoxypropyltriethoxysilane, 3-glycidoxypropyl (methyl) diethoxysilane, 2-glycidoxyethyltriethoxysilane, 2-glycidoxyethyl (methyl) Diethoxysilane, 3- (3,4-epoxycyclohexyl) propyltriethoxysilane, 3- (3,4-epoxycyclohexyl) propyl (methyl) diethoxysilane, 2-
- the silane coupling agent may be used alone or in combination of two or more.
- the content of the silane coupling agent is preferably 0.01 parts by mass to 1 part by mass and more preferably 0.05 parts by mass to 0.5 parts by mass with respect to 100 parts by mass of the acrylic pressure-sensitive adhesive. Preferably, it is 0.1 to 0.3 parts by mass.
- the content of the silane coupling agent is within the above range, when the adhesive layer and the glass are bonded in direct contact with each other, the adhesive layer can be attached with an appropriate adhesive force, and good holding power and durability can be obtained. Therefore, it is preferable.
- the thickness of the adhesive layer is preferably 0.3 ⁇ m to 50 ⁇ m, more preferably 0.5 ⁇ m to 30 ⁇ m. By setting the thickness of the adhesive layer to 0.3 ⁇ m or more, the near-infrared absorption ability can be made sufficient, and by setting it to 50 ⁇ m or less, the residual solvent when forming the adhesive layer is suppressed. be able to.
- the substrate film is not necessarily limited as long as it is in the form of a film, and examples thereof include a release film having peelability, a support film, and a functional film having other functions.
- the functional film examples include an ultraviolet absorbing film for preventing light from being deteriorated by ultraviolet rays and improving light resistance, and a color tone correcting film for absorbing light in a specific wavelength region other than ultraviolet rays.
- the specific wavelength absorbed by the color tone correction film may include not only visible light but also near infrared light, and may absorb a plurality of specific wavelength regions.
- examples of the functional film include an antireflection film for improving image visibility and an electromagnetic wave shielding film for cutting electromagnetic waves emitted from a display device such as a plasma display panel.
- the material of the base film is not necessarily limited, but a resin film is preferable because it is easy to handle when manufacturing an optical film.
- the resin film include polyesters such as polyethylene terephthalate (PET) and polybutylene terephthalate (PBT); polyolefins such as polyethylene and polypropylene; polyacrylates such as polymethyl methacrylate (PMMA); polycarbonates (PC); Triacetate, polyvinyl alcohol, polyvinyl chloride, polyvinylidene chloride, ethylene-vinyl acetate copolymer, polyvinyl butyral, polyurethane, cellophane, and the like.
- the film may be a single layer or two or more layers.
- the optical film of the present invention is for flat panel display devices such as plasma display panels (PDP), plasma addressed liquid crystal (PALC) display panels, field emission display (FED) panels, and display devices such as cathode ray tube display devices (CRT). It can be suitably used as an optical filter.
- PDP plasma display panels
- PLC plasma addressed liquid crystal
- FED field emission display
- CRT cathode ray tube display devices
- An optical filter is obtained by attaching one or more functional films to a substrate, and the optical film of the present invention is used as such a functional film or as an adhesive layer for adhering such a functional film.
- the substrate include a transparent substrate made of glass, a highly rigid polymer material, or the like.
- a transparent substrate made of glass, tempered or semi-tempered glass, polycarbonate, polyacrylate or the like is used.
- the optical filter is generally arranged on the viewing side of the display device, an achromatic color is preferable.
- the adjustment of chromaticity can be performed, for example, by appropriately selecting the type of functional film or substrate in addition to the type and content of the pigment contained in the adhesive layer.
- the luminous average transmittance of the optical filter is preferably 25% or more, and more preferably 45% or more. Adjustment of the luminous average transmittance can be performed by selecting, for example, a highly transparent film as a functional film or a substrate, or by appropriately selecting the type and content of the pigment to be contained in the adhesive layer.
- the method for producing an optical film of the present invention comprises a mixing step of preparing a coating liquid by mixing a pressure-sensitive adhesive, a diimonium compound of the formula (1), and a solvent capable of dissolving the diimonium compound, and a method based on the coating liquid. It is characterized by having an application process for forming a coating layer by coating on a material film, and a heating process for forming an adhesive layer by heating the coating layer to 100 ° C. or higher.
- the diimonium compound of the formula (1) is used, and after the diimonium compound is once dissolved in a solvent, the diimonium compound is effectively aggregated or crystallized by heating to 100 ° C. or higher. It can be set as the lump which becomes 200 degreeC or more in melting
- the pressure-sensitive adhesive and diimonium compound used in the mixing step can be those already described.
- the solvent is not necessarily limited as long as it can dissolve the diimonium compound, but a ketone-based solvent can be suitably used because it is excellent in solubility of the diimonium compound.
- a ketone-based solvent can be suitably used because it is excellent in solubility of the diimonium compound.
- the ketone solvent for example, acetone, methyl ethyl ketone (MEK), methyl isobutyl ketone (MIBK), cyclohexanone, or the like can be preferably used.
- MEK is preferably used as a solvent.
- the mixing step it is preferable to prepare a coating liquid by mixing and mixing the pressure-sensitive adhesive, the diimonium compound, the solvent, and other components as necessary, and sufficiently dissolving the diimonium compound. If the diimonium compound is not sufficiently dissolved, the diimonium compound may be effectively agglomerated or crystallized by heating, and it may not be possible to obtain a mass having a melting point of 200 ° C. or higher.
- the method for preparing the coating liquid is not necessarily limited, but it is preferable to first mix the diimonium compound and the solvent, and then add the pressure-sensitive adhesive thereto and mix them. By doing in this way, it becomes easy to dissolve a diimonium compound in a solvent.
- the individual mixing is preferably performed for 1 minute or more, more preferably 10 minutes or more, from the viewpoint of sufficiently dissolving the diimonium compound.
- the compounding amount of the solvent varies depending on the solubility of the diimonium compound in the solvent, specifically, the number of substituents of the diimonium compound.
- the solvent is preferably 20 parts by mass or more, and more preferably 30 parts by mass or more. There exists a possibility that a diimonium compound cannot fully be dissolved in it being less than 20 mass parts of solvents with respect to 1 mass part of diimonium compounds.
- the solvent is sufficient if it is 200 parts by mass with respect to 1 part by mass of the diimonium compound, and can usually be 150 parts by mass or less.
- the blending amount of the solvent with respect to the total amount of the diimonium compound and the pressure-sensitive adhesive can be appropriately selected according to the type of the pressure-sensitive adhesive, the coating method, and the like.
- the solvent can be 10 to 150 parts by mass with respect to 100 parts by mass of the total amount of the diimonium compound and the adhesive.
- the compounding amount of the solvent is 150 parts by mass, the diimonium compound and the pressure-sensitive adhesive can be sufficiently dissolved.
- the amount exceeds 150 parts by mass the coating becomes difficult, and the subsequent drying may take time. is there.
- the solvent is preferably 200 to 2000 parts by mass with respect to 100 parts by mass of the total amount of the diimonium compound and the pressure-sensitive adhesive. When it is in this range, coating can be performed satisfactorily.
- the application method of the coating liquid in the application process is not particularly limited.
- dip coating method, spray coating method, spinner coating method, bead coating method, wire bar coating method, blade coating method, roller coating method, curtain Coating methods such as a coating method, a slit die coater method, a gravure coater method, a slit reverse coater method, a micro gravure method, and a comma coater method can be appropriately employed.
- the heating step can be performed, for example, by putting a base film on which a coating layer is formed in an oven and heating to 100 ° C. or higher.
- the heating temperature is less than 100 ° C., the diimonium compound may not be aggregated or crystallized to form a lump.
- the lump cannot have a melting point of 200 ° C. or higher.
- the heating temperature is not necessarily limited as long as it is 100 ° C. or higher, but is preferably 110 ° C. or higher, and usually 150 ° C. or lower. If the heating temperature is 150 ° C., the diimonium compound can be sufficiently agglomerated or crystallized, and if it exceeds 150 ° C., the properties of the pressure-sensitive adhesive and the substrate film may be deteriorated.
- the heating time is not necessarily limited as long as the diimonium compound can be sufficiently aggregated or crystallized, but it is usually preferably 1 minute to 10 minutes. When the heating time is less than 1 minute, it is not easy to sufficiently aggregate or crystallize the diimonium compound, and the solvent may not be sufficiently removed. Further, if the heating time is 10 minutes, the diimonium compound can be sufficiently agglomerated or crystallized, and if it exceeds 10 minutes, not only the productivity is lowered but also the properties of the pressure-sensitive adhesive and the substrate film are lowered. There is a fear.
- the adhesive layer is used to attach to another functional film.
- the release film may be peeled off and attached to the substrate.
- the release film is peeled off and further attached to another functional film. You may stick to a board
- the optical film when the optical film has an adhesive layer formed on one main surface of the functional film, the optical film may be directly attached to the substrate using the adhesive layer, or may be attached to another functional film. Thereafter, this may be attached to a substrate using a known adhesive to form an optical filter.
- Examples 1 to 6 are examples, and examples 7 to 9 are comparative examples.
- the reaction solution was cooled and filtered. After adding 40 parts by mass of methanol to the filtrate and stirring at 5 ° C. or lower for 1 hour, the produced crystals were filtered, washed with methanol, and dried to obtain brown crystals. With respect to the brown crystals, the number of substituents (the number of n-propyl groups) was measured by high performance liquid chromatography.
- Dye B brominated alkyl (alkyl group: n-propyl group) and brominated alkyl (alkyl group: i-butyl group) mixed at a mass ratio of 6: 2 as brominated alkyl Dye B (diimonium compound of the formula (1) having 5.7 substituents) was obtained in the same manner except that was used.
- Dye C In the production of Dye A, the brominated alkyl (alkyl group: n-propyl group) and brominated alkyl (alkyl group: i-butyl group) in a mass ratio of 5.5: 2.5 are used as the brominated alkyl.
- Dye C diimonium compound of the formula (1) having a number of substituents of 4.9 was obtained in the same manner except that the mixture in the above was used.
- Dye D In the production of Dye A, the same procedure was carried out except that only brominated alkyl (alkyl group: i-butyl group) was used as the brominated alkyl.
- Dye D (the number of substituents of the diimmonium compound of formula (1) was set to 0 group) Obtained).
- Dye E (monovalent aminium) was prepared in the same manner except that the aqueous solution of 60% by mass of tris (trifluoromethanesulfonyl) carbonic acid was changed to 3.5 parts by weight and the silver nitrate was changed to 0.8 parts by mass. Compound) was obtained.
- Dye F In the production of Dye D, the same procedure was applied except that tris (trifluoromethanesulfonyl) carbonic acid was changed to tris (trifluoromethanesulfonyl) imidic acid, and dye F (X ⁇ in the diimonium compound of formula (1) was changed) )
- Adhesive solution X As monomer components, 60.8 parts by weight of n-butyl acrylate, 38 parts by weight of methyl acrylate, 1.0 part by weight of 2-hydroxyethyl acrylate, 0.2 part by weight of acrylamide, and initiator As an acrylic acid having a weight average molecular weight of 650,000 and a glass transition temperature of ⁇ 25 ° C., 0.2 parts by mass of azobisisobutyronitrile is dissolved in an ethyl acetate aqueous solution and stirred at 60 ° C. for 17 hours. An ester copolymer solution was obtained.
- This acrylic acid ester copolymer solution was diluted with methyl ethyl ketone and adjusted so that the solid content, ethyl acetate, and methyl ethyl ketone were in a mass ratio of 30:40:30.
- Adhesive solution Y As monomer components, 61.5 parts by weight of n-butyl acrylate, 37.0 parts by weight of methyl acrylate, 1.0 part by weight of 2-hydroxyethyl acrylate, and 0.5 parts by weight of acrylamide, and By dissolving 0.2 parts by mass of azobisisobutyronitrile as an initiator in an aqueous solution of ethyl acetate and stirring at 60 ° C. for 10 hours, the weight average molecular weight is 390,000 and the glass transition temperature is ⁇ 27 ° C. An acrylic ester copolymer solution was obtained.
- This acrylic acid ester copolymer solution was diluted with methyl ethyl ketone and adjusted so that the solid content, ethyl acetate, and methyl ethyl ketone were in a mass ratio of 30:40:30.
- 0.2 parts by mass of trimethylolpropane-modified tolylene diisocyanate (manufactured by Nippon Polyurethane Co., Ltd., trade name: Coronate L, solid content: 75% by mass) is added as an isocyanate curing agent, and an adhesive.
- Solution Y was obtained.
- Adhesive solution Z In the adjustment of the pressure-sensitive adhesive solution X, a pressure-sensitive adhesive solution Z was obtained in the same manner except that methyl ethyl ketone used for dilution was changed to toluene.
- Example 1 0.15 parts by mass of Dye A was added to 15 parts by mass of methyl ethyl ketone (MEK), and dissolved by stirring for 10 minutes with a mixer. Further, 50 parts by mass of the pressure-sensitive adhesive solution X was added to the dye solution, and the mixture was stirred for 10 minutes to be dissolved to obtain a coating solution.
- MEK methyl ethyl ketone
- This coating solution was applied to a release film in which a silicone layer was formed on a PET film using an applicator to form a coating layer, which was heated in an oven at 120 ° C. for 3 minutes to form an adhesive layer.
- the release film on which the adhesive layer was formed was laminated on an antireflection film (trade name: RL7800, manufactured by NOF Corporation) to obtain an antireflection film with an adhesive layer as an optical film.
- Example 2 In the production of the optical filter of Example 1, the optical filter was produced in the same manner except that the dye A was changed to the dye B and the addition amount was changed to 0.45 parts by mass.
- Example 3 In the production of the optical filter of Example 2, an optical filter was produced in the same manner except that the pressure-sensitive adhesive solution X was changed to the pressure-sensitive adhesive solution Y.
- Example 4 In the production of the optical filter of Example 2, an optical filter was produced in the same manner except that 0.1 part by mass of a porphyrin compound (manufactured by Yamada Chemical Co., Ltd., trade name: TAP) was further added when preparing the dye solution.
- a porphyrin compound manufactured by Yamada Chemical Co., Ltd., trade name: TAP
- Example 5 In the production of the optical filter of Example 4, instead of laminating the antireflection film with the adhesive layer directly on the glass substrate, the optical filter was prepared in the same manner except that the antireflection film with the adhesive layer was laminated through the metal mesh film. Manufactured.
- a commercially available metal mesh film (Dai Nippon Printing Co., Ltd., trade name: AR50G90T-100, configuration: copper foil mesh / adhesive / PET film / adhesive / separator film) was used as the metal mesh film.
- the metal mesh film is placed so that the metal mesh side is the antireflection film with the adhesive layer, and the adhesion between the metal mesh film and the glass substrate uses the metal mesh film adhesive, with the metal mesh film and the adhesive layer. Adhesion with the antireflection film was performed using the adhesive layer of the antireflection film with an adhesive layer.
- Example 6 In the production of the optical filter of Example 1, the optical filter was produced in the same manner except that the dye A was changed to the dye C and the addition amount was changed to 0.45 parts by mass.
- Example 7 In the production of the optical filter of Example 1, the optical filter was produced in the same manner except that the dye A was changed to the dye D and the addition amount was changed to 0.45 parts by mass.
- Example 8 In the production of the optical filter of Example 1, the optical filter was produced in the same manner except that the dye A was changed to the dye E and the addition amount was changed to 0.45 parts by mass.
- Example 9 In the production of the optical filter of Example 1, methyl ethyl ketone was added to toluene, Dye A was added to Dye F (particle diameter 50 to 500 ⁇ m), the addition amount was 0.45 parts by mass, and the adhesive solution X was used to the adhesive solution Z. An optical filter was produced in the same manner except that each was changed.
- Table 1 shows the configurations of the optical filters of Examples 1 to 9.
- Table 2 shows the melting point of the block in the optical film (antireflection film with an adhesive layer) used for production of each optical filter and the melting point of the pigment contained in the adhesive layer.
- the melting point was measured using a differential scanning calorimeter (trade name: DSC220C, manufactured by Seiko Instruments Inc.) with a sample weight of 10 g, a heating rate of 10 ° C./min, and the endothermic peak temperature as the melting point.
- DSC220C differential scanning calorimeter
- Table 2 “-” indicates that the melting point was not measured.
- the lumps in the adhesive layers of Examples 1 to 6 were heated at a temperature of 100 ° C. or higher after using the dimonium compound of the formula (1) and dissolved in a solvent. It becomes 200 degreeC or more, and it is recognized that the lump with melting
- the pressure-sensitive adhesive layer of the comparative example using a material other than the diimonium compound of the formula (1) does not measure the melting point, or does not reach 200 ° C. even if measured, and the dye compound in the pressure-sensitive adhesive layer is a lump. It is recognized that it is not.
- optical characteristics visual average transmittance, chromaticity, near infrared transmittance, and haze
- optical characteristics visual average transmittance, chromaticity, near infrared transmittance, and haze
- the luminous average transmittance and chromaticity were measured using a spectrophotometer (manufactured by Shimadzu Corporation, ultraviolet / visible near infrared spectrophotometer, trade name: SolidSpec-3700), and JISZ 8701- According to 1999, the luminous average transmittance (Tv) and chromaticity coordinates (x, y) in the visible region (380 to 780 nm) were calculated.
- the near-infrared transmittance is measured in the near-infrared region (850 nm, 900 nm, and 950 nm), and the near-infrared transmittance for each wavelength (T850, T900, and T950) is compared with the transmittance of indoor air. ) Moreover, haze (haze) was measured using the turbidimeter (Nippon Denshoku Industries Co., Ltd. make, brand name: NDH5000W).
- Table 3 shows the optical characteristics of the optical filters of Examples 1 to 9.
- Table 4 shows the change in characteristics after the heat test (each value after “heat test—before heat test” indicated by ⁇ ).
- the solubility of the diimonium compound is high and the sufficient content can be obtained, so that the optical characteristics, particularly the initial optical characteristics are good. It was recognized that
- the optical film of the present invention is an optical film that is excellent in productivity, such as saving the trouble of providing a conventional near-infrared absorbing film, and further suppressed deterioration of the diimonium compound that is a near-infrared absorbing dye in the adhesive layer. It is useful as an optical filter for display devices. It should be noted that the entire contents of the specification, claims, and abstract of Japanese Patent Application No. 2010-145315 filed on June 25, 2010 are incorporated herein as the disclosure of the specification of the present invention. Is.
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Abstract
Description
糊残りが生じない良好な再剥離性を有し、かつ良好な耐久性が得られる点から、粘着層のゲル分率は85%以上であることが好ましく、90%以上であることがより好ましい。
本発明の光学フィルムの製造方法は、粘着剤、式(1)のジイモニウム化合物、およびこのジイモニウム化合物を溶解可能な溶媒を混合して塗工液を調製する混合工程と、この塗工液を基材フィルム上に塗布して塗工層を形成する塗布工程と、この塗工層を100℃以上に加熱して粘着層を形成する加熱工程とを有することを特徴とする。
p-フェニレンジアミンと1-クロロ-4-ニトロベンゼンとのウルマン反応生成物を還元することにより得られたN,N,N',N'-テトラキス(p-アミノフェニル)-p-フェニレンジアミンの2.2質量部をN,N-ジメチルホルムアミドの16質量部に溶解し、これに臭素化アルキル(アルキル基:n-プロピル基)の6~12質量部を加え、130℃で10時間反応させた。
色素Aの製造において、臭素化アルキルとして、臭素化アルキル(アルキル基:n-プロピル基)と臭素化アルキル(アルキル基:i-ブチル基)とを質量比で6:2の割合で混合したものを用いた以外は同様にして、色素B(置換基数が5.7基である式(1)のジイモニウム化合物)を得た。
色素Aの製造において、臭素化アルキルとして、臭素化アルキル(アルキル基:n-プロピル基)と臭素化アルキル(アルキル基:i-ブチル基)とを質量比で5.5:2.5の割合で混合したものを用いた以外は同様にして、色素C(置換基数が4.9基である式(1)のジイモニウム化合物)を得た。
色素Aの製造において、臭素化アルキルとして、臭素化アルキル(アルキル基:i-ブチル基)のみを用いた以外は同様にして、色素D(式(1)のジイモニウム化合物の置換基数を0基としたもの)を得た。
色素Bの製造において、さらにトリス(トリフルオロメタンスルホニル)カルボニウム酸60質量%水溶液を3.5重量部とし、硝酸銀を0.8質量部に変更した以外は同様にして、色素E(1価のアミニウム化合物)を得た。
色素Dの製造において、さらにトリス(トリフルオロメタンスルホニル)カルボニウム酸をトリス(トリフルオロメタンスルホニル)イミド酸に変更した以外は同様にして、色素F(式(1)のジイモニウム化合物におけるX-を変更したもの)を得た。
単量体成分としてアクリル酸n-ブチルの60.8質量部、アクリル酸メチルの38質量部、アクリル酸2-ヒドロキシエチルの1.0質量部、およびアクリルアミドの0.2質量部、ならびに開始剤としてアゾビスイソブチロニトリルの0.2質量部を酢酸エチル水溶液に溶解し、60℃で17時間撹拌することにより、重量平均分子量が65万であり、ガラス転移温度が-25℃のアクリル酸エステル共重合体溶液を得た。
単量体成分としてアクリル酸n-ブチルの61.5質量部、アクリル酸メチルの37.0質量部、アクリル酸2-ヒドロキシエチルの1.0質量部、およびアクリルアミドの0.5質量部、ならびに開始剤としてアゾビスイソブチロニトリルの0.2質量部を酢酸エチルの水溶液に溶解し、60℃で10時間撹拌することにより、重量平均分子量が39万であり、ガラス転移温度が-27℃のアクリル酸エステル共重合体溶液を得た。
粘着剤溶液Xの調整において、希釈に用いるメチルエチルケトンをトルエンに変更した以外は同様にして、粘着剤溶液Zを得た。
メチルエチルケトン(MEK)の15質量部に色素Aの0.15質量部を添加し、ミキサーで10分間撹拌して溶解させた。さらに、この色素溶液に粘着剤溶液Xの50質量部を添加し、10分間撹拌して溶解させることにより塗工液を得た。
例1の光学フィルタの製造において、色素Aを色素Bに変更するとともに、その添加量を0.45質量部に変更した以外は同様にして、光学フィルタを製造した。
例2の光学フィルタの製造において、粘着剤溶液Xを粘着剤溶液Yに変更した以外は同様にして、光学フィルタを製造した。
例2の光学フィルタの製造において、色素溶液を調整する際、さらにポルフィリン化合物(山田化学社製、商品名:TAP)0.1質量部を加えた以外は同様にして、光学フィルタを製造した。
例4の光学フィルタの製造において、ガラス基板に直に粘着層付き反射防止フィルムをラミネートする代わりに、金属メッシュフィルムを介して粘着層付き反射防止フィルムをラミネートした以外は同様にして、光学フィルタを製造した。
例1の光学フィルタの製造において、色素Aを色素Cに変更するとともに、その添加量を0.45質量部に変更した以外は同様にして、光学フィルタを製造した。
例1の光学フィルタの製造において、色素Aを色素Dに変更するとともに、その添加量を0.45質量部に変更した以外は同様にして、光学フィルタを製造した。
例1の光学フィルタの製造において、色素Aを色素Eに変更するとともに、その添加量を0.45質量部に変更した以外は同様にして、光学フィルタを製造した。
例1の光学フィルタの製造において、メチルエチルケトンをトルエンに、色素Aを色素F(粒子径50~500μm)に、その添加量を0.45質量部に、また粘着剤溶液Xを粘着剤溶液Zにそれぞれ変更した以外は同様にして、光学フィルタを製造した。
なお、2010年6月25日に出願された日本特許出願2010-145315号の明細書、特許請求の範囲、および要約書の全内容をここに引用し、本発明の明細書の開示として、取り入れるものである。
Claims (11)
- 前記R1~R8のうち炭素数1~3の脂肪族炭化水素基がプロピル基であり、その他の脂肪族炭化水素基がブチル基である請求項1に記載の光学フィルム。
- 前記粘着層が、前記粘着剤を90質量%~99質量%含有する請求項1又は2に記載の光学フィルム。
- 前記粘着層が、前記ジイモニウム化合物を前記粘着剤100質量部に対して、0.5質量部~5質量部含有する請求項1~3のいずれかに記載の光学フィルム。
- 前記粘着剤が、アクリル系粘着剤、シリコーン系粘着剤、ウレタン系粘着剤、又はブタジエン系粘着剤である請求項1~4のいずれかに記載の光学フィルム。
- 前記塊状体の融点が、含有されるジイモニウム化合物の融点に比べて1~20℃低い請求項1~5のいずれかに記載の光学フィルム。
- 粘着層が、さらに、最大吸収波長(λmax)が800nm~1100nmの範囲にある
近赤外線吸収色素を含有する請求項1~6のいずれかに記載の光学フィルム。 - 請求項1~7のいずれかに記載の光学フィルムを使用した光学フィルタ。
- 前記混合工程は、前記ジイモニウム化合物と前記溶媒とを混合した後、前記粘着剤を添加して混合する請求項9に記載の光学フィルムの製造方法。
- 前記溶媒はケトン系溶媒である請求項9または10に記載の光学フィルムの製造方法。
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CN2011800315129A CN102959435A (zh) | 2010-06-25 | 2011-06-24 | 光学薄膜及其制造方法 |
JP2012521556A JPWO2011162393A1 (ja) | 2010-06-25 | 2011-06-24 | 光学フィルムとその製造方法 |
EP11798274.4A EP2587285A4 (en) | 2010-06-25 | 2011-06-24 | OPTICAL FILM AND METHOD FOR PRODUCING THE SAME |
KR1020127033501A KR20130096167A (ko) | 2010-06-25 | 2011-06-24 | 광학 필름과 그 제조 방법 |
US13/727,320 US8664309B2 (en) | 2010-06-25 | 2012-12-26 | Optical film and process for its production |
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JP (1) | JPWO2011162393A1 (ja) |
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CN (1) | CN102959435A (ja) |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2012236869A (ja) * | 2011-05-10 | 2012-12-06 | Tomoegawa Paper Co Ltd | 粘着型光学フィルム及びプラズマディスプレイパネル |
WO2017034002A1 (ja) * | 2015-08-25 | 2017-03-02 | 積水化学工業株式会社 | 粘着剤層付き耐火部材 |
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JP6720969B2 (ja) * | 2015-05-12 | 2020-07-08 | Agc株式会社 | 光学フィルタおよび撮像装置 |
CN107429128A (zh) * | 2016-03-09 | 2017-12-01 | 三菱化学株式会社 | 粘接膜及其制造方法 |
CN110799865B (zh) * | 2017-06-27 | 2022-06-10 | 住友化学株式会社 | 光学膜 |
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- 2011-06-24 WO PCT/JP2011/064588 patent/WO2011162393A1/ja active Application Filing
- 2011-06-24 EP EP11798274.4A patent/EP2587285A4/en not_active Withdrawn
- 2011-06-24 JP JP2012521556A patent/JPWO2011162393A1/ja not_active Withdrawn
- 2011-06-24 TW TW100122379A patent/TW201204804A/zh unknown
- 2011-06-24 KR KR1020127033501A patent/KR20130096167A/ko not_active Application Discontinuation
- 2011-06-24 CN CN2011800315129A patent/CN102959435A/zh active Pending
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JPWO2011162393A1 (ja) | 2013-08-22 |
KR20130096167A (ko) | 2013-08-29 |
CN102959435A (zh) | 2013-03-06 |
EP2587285A1 (en) | 2013-05-01 |
US20130116370A1 (en) | 2013-05-09 |
TW201204804A (en) | 2012-02-01 |
US8664309B2 (en) | 2014-03-04 |
EP2587285A4 (en) | 2014-10-15 |
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