WO2005121265A1 - シロキサン系塗料、光学物品およびシロキサン系塗料の製造方法 - Google Patents
シロキサン系塗料、光学物品およびシロキサン系塗料の製造方法 Download PDFInfo
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- WO2005121265A1 WO2005121265A1 PCT/JP2005/010647 JP2005010647W WO2005121265A1 WO 2005121265 A1 WO2005121265 A1 WO 2005121265A1 JP 2005010647 W JP2005010647 W JP 2005010647W WO 2005121265 A1 WO2005121265 A1 WO 2005121265A1
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/006—Anti-reflective coatings
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/04—Polysiloxanes
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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
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/66—Additives characterised by particle size
- C09D7/67—Particle size smaller than 100 nm
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/66—Additives characterised by particle size
- C09D7/68—Particle size between 100-1000 nm
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/14—Protective coatings, e.g. hard coatings
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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
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/34—Silicon-containing compounds
- C08K3/36—Silica
Definitions
- the present invention relates to a siloxane-based paint, an optical article, and a method for producing a siloxane-based paint.
- the present invention relates to a siloxane-based paint containing silica fine particles and a siloxane compound, and an optical article.
- the optical article of the present invention is used for an antireflection film, an antireflection film, an antireflection plate, an optical filter, an optical lens, a display, and the like.
- Anti-reflection films are used in optical components such as lenses and image display devices such as computer displays to reduce the reflection of external light sources such as sunlight and fluorescent lamps and improve visibility. It is required that the reflection of visible light is small.
- As an anti-reflection technique it is known that the reflectance is reduced by coating the surface of a substrate with a transparent film having a small refractive index (see Patent Document 1). Furthermore, reflection can be more effectively prevented by forming a high refractive index layer on a base material and forming a low refractive index layer thereon.
- a metal oxide-containing layer as a high-refractive index layer and a siloxane-based resin layer as a low-refractive index layer on the base film surface having releasability are transferred to an antireflection antistatic plate.
- Materials are known (see Patent Document 2).
- Examples of the low-refractive index material for forming the low-refractive index layer include inorganic materials such as MgF (refractive index: 1.38) and SiO (refractive index: 1.47). In the case of organic materials,
- Fluoro resin (refractive index: 1.34 to L40), siloxane resin (refractive index: 1.40 to L45) and the like.
- the coating film-forming coating material containing a large amount of the silica fine particles has a storage stability when used as a coating film-forming coating material, for example, secondary aggregation between particles occurs or aggregates settle out of the coating material. Had a problem.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2002-122704 (pages 1-4)
- Patent Document 2 Japanese Patent Application Laid-Open No. 2000-338306 (pages 2-3)
- Patent Document 3 Japanese Patent Application Laid-Open No. 2001-233611 (Pages 7-11)
- Patent Document 4 Japanese Patent Application Laid-Open No. 2002-79616 (pages 1-2)
- silica fine particles do not cause secondary agglomeration in a paint, have good storage stability, and have a high surface hardness of a film obtained when a film is formed with the paint, that is,
- An object of the present invention is to provide a siloxane-based paint capable of obtaining a film having good scratch resistance and a method for producing the same.
- Another object of the present invention is to provide an optical article having excellent antireflection properties and excellent scratch resistance.
- the present invention is a paint containing silica fine particles, a siloxane compound and a curing agent.
- the obtained film is a siloxane-based coating having a uniform film.
- the present invention also provides a siloxane-based coating on a transparent substrate, wherein the elemental content of the tetrafunctional silicon with respect to all the silicon in the coating is 0.3 to 0.6, With a fluorine content of 0.
- An optical article wherein the content of fluorine with respect to carbon is from 0.4 to 0.6 and the refractive index of the coating is from 1.25 to L4.
- the present invention is a method for producing a siloxane-based coating material, which comprises subjecting a silane conjugate to hydrolysis with an acid catalyst in a solvent in the presence of silica fine particles, and then subjecting the hydrolyzate to a condensation reaction.
- the siloxane-based coating of the present invention by pre-homogenizing the silica fine particles and the siloxane compound, secondary aggregation of the silica fine particles in the coating can be suppressed, and the storage stability of the coating is improved. It becomes possible. Further, when a film is formed, a film having excellent surface hardness can be obtained. The obtained film can be suitably used especially as a low refractive index layer such as an antireflection sheet or an antireflection film.
- optical article of the present invention by having a coating having a refractive index of 1.25 to: L4 and containing silicon, carbon and fluorine at a specific ratio, antireflection is achieved. It has excellent resistance and exhibits excellent scratch resistance.
- FIG. 1 is a TEM photograph of a cross section of the coating film of Example 1 observed at a magnification of 40,000.
- FIG. 2 is a TEM photograph of the siloxane-based coating film of FIG. 1 at a magnification of 200,000.
- FIG. 3 is a TEM photograph showing a cross section of the coating film of Comparative Example 1 at a magnification of 40,000.
- FIG. 4 is a TEM photograph of the siloxane-based film of FIG. 3 at a magnification of 200,000.
- FIG. 5 is a cross-sectional TEM photograph (magnification: 200,000) showing another example of a siloxane-based film in a non-homogeneous state.
- the siloxane-based paint of the present invention contains silica fine particles, a siloxane compound and a curing agent. And when a coating is formed with the paint, the resulting coating is homogeneous.
- TEM transmission electron microscope
- a white circle is the cavity 1 inside the silica fine particles.
- the outside of the white circle is the outer shell of the silica fine particles and the siloxane compound. As shown in the figure, the two are homogenized, and no boundary portion between the silica fine particles and the siloxane bonded product is observed.
- FIGS. 4 and 5 what looks like a white circle is the cavity 1 inside the silica fine particles.
- a dark-colored thin layer exists outside the white circle so as to cover it, and a light-colored matrix exists outside the white circle.
- the dark colored thin layer is the outer shell 2 of the silica fine particles, and the light colored matrix is the siloxane conjugate 3.
- the reason why such a homogenous state is formed is that the silica fine particles and the siloxane compound are bonded. Thereby, the dispersion stability of the silica fine particles in the siloxane-based paint is improved, and secondary aggregation can be suppressed. In addition, when a coating is formed, the surface hardness of the coating is improved because the siloxane-bonded material, which is a matrix material, and the silica fine particles are firmly bonded.
- the siloxane-based coating composition of the present invention is formed by hydrolyzing a silanol conjugate in a solvent with an acid catalyst in the presence of silica fine particles to form a silanol conjugate, and then condensing the silanol compound. It can be obtained by reacting.
- silanol ligature one or more silani ligates selected from the group consisting of the following general formulas (1) to (5): Are preferred.
- the obtained paint contains a siloxane conjugate which is a condensate of these silane conjugates.
- these silanol conjugates may contain hydrolyzed, non-condensed silanol conjugates.
- R 1 represents a fluoroalkyl group having 3 to 17 fluorine atoms.
- the fluorine number of R 1 is preferably 6-8. When the number of fluorine atoms per molecule is large, the hardness of the obtained coating tends to decrease.
- the carbon number of R 1 is preferably 3 to 10 because the scratch resistance of the obtained coating can be increased. Particularly, carbon number 3 is preferable.
- R 6 represents a methyl group, an ethyl group, a propyl group, an isopropyl group or an acetyl group, which may be the same or different.
- R 6 is more preferably a methyl group or an ethyl group.
- R 2 represents Bulle group, Ariru group, an alkenyl group, acryl group, methacryl group, methacryl O alkoxy group, Shiano group, an epoxy group, glycidoxy group, an amino group, and a group selected from those substituents.
- As the carbon number of R 2 , 2 to 10 is preferable since the scratch resistance of the obtained coating can be increased.
- R 7 is a methyl group, Echiru group, a propyl group, an isopropyl group, an Metokishechiru group or ⁇ cetyl group, and these may be the same or different.
- R 7 is more preferably a methyl group or an ethyl group.
- R 3 represents a group selected from hydrogen, an alkyl group, an aryl group, and a substituent thereof.
- R 3 represents a group selected from hydrogen, an alkyl group, an aryl group, and a substituent thereof.
- As the carbon number of R 3 1 to 6 is preferable since the scratch resistance of the obtained coating can be increased. When R 3 exceeds 6 carbon atoms, the hardness of the obtained coating tends to decrease.
- R 8 represents a methyl group, Echiru group, propyl group or butyl group, and these may be the same or different.
- R 8 is more preferably a methyl group or an ethyl group.
- R 4 and R 5 each represent a group selected from hydrogen, an alkyl group, a fluoroalkyl group, an aryl group, an alkenyl group, a metharyloxy group, an epoxy group, a glycidoxy group, an amino group, and a substituent thereof. , May be the same or different.
- R 4 ,
- R 5 may, good preferable since it is possible to enhance the abrasion resistance of the resulting coating.
- R 9 represents a methyl group, Echiru group, a propyl group, an isopropyl group or Asechiru group, and these may be the same or different.
- R 9 is more preferably a methyl group or an ethyl group.
- R 1C> represents a methyl group or an ethyl group, each of which may be the same or different
- silani conjugates represented by the general formulas (1) to (5) may be used alone or in combination of two or more.
- the content of the siloxane bond is preferably 20% by weight to 70% by weight, particularly preferably 30% by weight to 60% by weight, based on the total amount of the film when the film was formed. It is preferable to contain the siloxane compound in this range because the refractive index of the coating can be reduced and the hardness of the coating can be increased. Therefore, the content of the siloxane compound in the coating material is preferably in the above range for all components except for the solvent.
- a fluorine-containing silane represented by the general formula (1) is used for low refractive index. It is preferable to use a compound as an essential component and to use a combination of one or more selected silane conjugates represented by the general formulas (2) to (5).
- the amount of the silane conjugate represented by the general formula (1) is preferably from 20% by weight to 80% by weight, particularly preferably from 30% by weight to 60% by weight, based on the total amount of the silane compound. If the amount of the silane compound is less than 20% by weight, the low refractive index may be insufficient. On the other hand, if the amount of the silane conjugate exceeds 80% by weight, the hardness of the coating may decrease.
- Examples of the trifunctional silani conjugate represented by the general formula (1) include trifluoromethyltrimethoxysilane, trifluoromethyltriethoxysilane, trifluoromethyltriacetoxysilane, and trifluoromethyltriethoxysilane.
- trifluoromethyltrimethoxysilane, trifluoromethyltriethoxysilane, trifluoropropyltrimethoxysilane, and trifluoropropyltriethoxysilane are preferred from the viewpoint of the hardness of the obtained coating. ! /.
- Examples of the trifunctional silani conjugate represented by the general formula (2) include butyltrimethoxysilane, vinyltriethoxysilane, vinyltriacetoxysilane, ⁇ -methacryloxypropyltrimethoxy Silane, ⁇ -methacryloxypropyltriethoxysilane, ⁇ -aminopropyltrimethoxysilane, ⁇ -aminopropyltriethoxysilane, ⁇ - ⁇ - (aminoethyl) - ⁇ -aminopropyltrimethoxysilane, j8-cyanoethino Retriethoxysilane, glycidoxymethinoletrimethoxysilane, glycidoxymethinoletriethoxysilane, oc-glycidoxet Tyltrimethoxysilane, a-Glycidoxyshethyltriethoxysilane, ⁇ -Glycidoxyethyltrimeth
- glycine de trimethoxysilane I over-glycidoxy propyl Honoré triethoxysilane, Y Hague Licid carboxymethyl Pro Pinot Retripropoxy silane, ⁇ -glycidoxypropinoletributoxy silane, y-glycidoxypropinoletrimethoxyethoxy silane, a-glycidoxybutynoletrimethoxy silane, OL-glycidoxybutyl triethoxy silane, 13-gly Doxybutyltrimethoxysilane, 13-glycidoxybutyltriethoxysilane, ⁇ -glycidoxybutyltrimethoxysilane, ⁇ -glycidoxybutyltriethoxysilane, ⁇ -glycidoxybutyltrimethoxysilane, ⁇ -glyci Doxybutynoletriethoxysilane, (3,4-epoxycyclohexyl) methyltrimethoxys
- Examples of the trifunctional silani conjugate represented by the general formula (3) include, for example, methyltrimethoxysilane, methyltriethoxysilane, methyltrimethoxyethoxysilane, methyltriacetoxysilane, methyltripropoxysilane, Methyltributoxysilane, ethyltrimethoxysilane, ethyltriethoxysilane, hexyltrimethoxysilane, octadecyltrimethoxysilane, octadecyltriethoxysilane, phenyltrimethoxysilane, phenyltriethoxysilane, 3 Aminopropyltriethoxysilane, ⁇ — (2 aminoethynole) 3 Aminopropynoletri Methoxysilane, 3-chloropropyl propyltrimethoxysilane, 3- (N, N diglycidyl)
- bifunctional silani conjugate represented by the general formula (4) examples include, for example, dimethyldimethoxysilane, dimethinorejetoxysilane, dimethinoresiacetoxysilane, dipheninoresimethoxysilane, diphenyldisilane.
- Toxysilane methylphenyldimethoxysilane, methylvinyldimethoxysilane, methylvinyldiethoxysilane, ⁇ -glycidoxypropylmethyldimethoxysilane, ⁇ -aminopropylmethyldimethoxysilane, ⁇ -aminopropylmethylethoxysilane, ⁇ — (2 aminoethyl) 3aminopropylmethyldimethoxysilane, ⁇ -methacryloxypropylmethyldimethoxysilane, ⁇ -methacryloxypropylmethylxyloxysilane, OC Chinore Mech Leger butoxy silane, / 3 over glycinate
- Toxysilane ⁇ -glycidoxypropinolemethinoresimethoxyethoxysilane, ⁇ -glycidoxypropinolemethinoresiphenoxysilane, ⁇ -glycidoxypropinolemethinoresiecetoxyethyl ethoxysilane , Glycidoxypropylvinyldimethoxysilane, polyglycidoxypropylvinyljetoxysilane, trifluoropropylmethyldimethoxysilane, trifluoropropylmethyljetoxysilane, trifluoropropylmethyldiacetoxysilane, trifluoropropyl Tyldimethoxysilane, trifluoropropylethyldiethoxysilane, trifluoropropylethyldiacetoxysilane, trifluoropropyl Butyl dimethoxysilane, trifluoropropyl vinyl ethoxy silane, trifluoroprop
- Examples of the tetrafunctional silani conjugate represented by the general formula (5) include tetramethoxysilane and tetraethoxysilane.
- the number average particle diameter of the silica fine particles used in the present invention is Inn! ⁇ 200nm power is preferred, and particularly preferred is the number average particle size Inn! ⁇ 70 nm.
- the number average particle size is less than 1 nm, the bonding with the matrix material becomes insufficient, and the hardness of the coating may decrease.
- the number average particle diameter exceeds 200 nm, the generation of voids between the particles caused by introducing a large amount of particles is reduced, and the effect of low refractive index may not be sufficiently exhibited.
- the average particle diameter of the silica fine particles can be measured by using various particle counters to measure the number average particle diameter. It is preferable to measure the particle size of the silica fine particles before adding to the paint. After the coating is formed, a method of measuring the particle diameter of the silica fine particles in the coating by using an electron scanning microscope or a transmission electron microscope is preferable.
- the number average particle diameter of the silica fine particles is preferably smaller than the thickness of the coating film to be formed. When the thickness exceeds the thickness of the coating, the silica fine particles are exposed on the surface of the coating, and the surface hardness and the stain resistance of the coating, which is reduced by anti-reflection property, are reduced.
- silica fine particles used in the present invention silica fine particles having a silanol group on the surface are preferable in order to easily react with the siloxane compound of the matrix.
- silica fine particles both silica fine particles having no cavity therein and silica fine particles having a cavity therein can be used.
- silica fine particles having a cavity therein are preferable for lowering the refractive index of the coating.
- Silica fine particles having no cavity therein have a small refractive index reduction effect because the refractive index of the particles themselves is 1.45 to: L50.
- silica microparticles having cavities inside have a large refractive index reduction effect due to their introduction, since the particles themselves have a refractive index of 1.20 to L40.
- Examples of the silica fine particles having a cavity therein include silica fine particles having a hollow portion surrounded by an outer shell, and porous silica fine particles having a large number of hollow portions. Among them, when the hardness of the coating is taken into consideration, porous silica fine particles having high strength of the particles themselves are preferred.
- the refractive index of the fine particles is preferably 1.20 to: L40, and more preferably 1.20 to: L.35.
- the number average particle diameter of the silica fine particles having a cavity inside is 5 ⁇ ! ⁇ 100 nm is preferred.
- the refractive index of the silica fine particles can be measured by the method disclosed in paragraph [0034] of JP-A-2001-233611.
- the content of the silica fine particles is preferably from 30% by weight to 80% by weight, particularly preferably from 40% by weight to 70% by weight, based on the total amount of the coating when the coating was formed. Therefore, the content of the silica fine particles in the coating is preferably in the above range with respect to all components except for the solvent.
- silica fine particles are contained in the coating in this range, the hardness of the coating can be increased while the refractive index can be lowered.
- the content of the silica fine particles is less than 30% by weight, the effect of lowering the refractive index due to voids between the particles is reduced.
- the content of the fine particles exceeds 80% by weight, a large number of island phenomena occur in the coating film, and the hardness of the coating film decreases, and the refractive index becomes non-uniform depending on the location. .
- silica fine particles having no voids therein include, for example, IPA-ST having a particle size of 12 nm and using isopropanol as a dispersant, and MIBK-ST having a particle size of 12 nm and using methylisobutyl ketone as a dispersant.
- IPA ST-L with a particle size of 45 nm and isopropanol as a dispersant IPA-ST-ZL with a particle size of 1 OO nm and isopropanol as a dispersant (trade name, manufactured by Nissan Chemical Industries, Ltd.), Oscar (registered trademark) 101 having a particle diameter of 12 nm and ⁇ -petit mouth outside as a dispersant, and Oscar (registered trademark) 105 having a particle diameter of 60 nm and ⁇ -petit mouth ratatone and a particle diameter of 120 nm.
- Oscar (registered trademark) 106 using diacetone alcohol as a dispersing agent (trade name, manufactured by Catalyst Danisei Kogyo Co., Ltd.).
- silica fine particles having a cavity therein are described, for example, in the methods described in paragraphs [003 3] to [0046] of JP-A-2001-233611 and in the paragraph [0043] of Patent No. 3272111. It can be manufactured by a method. Use commercially available products Can do.
- the hydrolysis reaction it is preferable to add the acid catalyst and water in the solvent over 1 to 180 minutes, and then react at room temperature to 80 ° C for 1 to 180 minutes. By performing the hydrolysis reaction under such conditions, a rapid reaction can be suppressed.
- the reaction temperature is more preferably 40-70. C.
- the silanolyl conjugate is obtained by the hydrolysis reaction, it is preferable to carry out the condensation reaction by directly heating the reaction solution at 50 ° C or higher and the boiling point of the solvent or lower for 1 to LOO hours. Further, in order to increase the degree of polymerization of the siloxane compound, reheating or addition of a base catalyst can be performed.
- Various conditions in the hydrolysis may be set for an intended use by setting, for example, an acid concentration, a reaction temperature, and a reaction time in consideration of a reaction scale, a size and a shape of a reaction vessel, and the like. Suitable physical properties can be obtained.
- Acid catalysts used in the hydrolysis reaction include acids such as hydrochloric acid, acetic acid, formic acid, nitric acid, oxalic acid, hydrochloric acid, sulfuric acid, phosphoric acid, polyphosphoric acid, polycarboxylic acids or anhydrides thereof, and ion exchange resins. Catalysts. Particularly, an acidic aqueous solution using formic acid, acetic acid or phosphoric acid is preferable.
- the preferable addition amount of these acid catalysts is preferably 0.05% by weight to 10% by weight, particularly preferably 0.1% by weight, based on the total amount of the silane conjugate used in the hydrolysis reaction. % To 5% by weight. If the amount of the acid catalyst is less than 0.05% by weight, the hydrolysis reaction may not proceed sufficiently. If the amount of the acid catalyst exceeds 10% by weight, the hydrolysis reaction may run away.
- the solvent is not particularly limited, but is determined in consideration of the stability, wettability, volatility, and the like of the siloxane-based paint.
- the solvent can be used not only as one kind but also as a mixture of two or more kinds.
- Specific examples of the solvent include, for example, methanol, ethanol, propanol, isopropanol, butanol, isobutanol, t-butanol, pentanol, 4-methyl-2-pentanol, 3-methyl-2-butanol, 3-methyl-3-methoxy- Alcohols such as 1-butanol and diacetone alcohol; glycols such as ethylene glycol and propylene glycol; ethylene glycol monomethyl ether, ethylene glycolone monoethylene enoate, propylene glycolone monomethynoateate, propylene Glyconore monoethylenoate propylene glycol Ethers such as tinoleate ether, ethylene glycol dibutyl
- the hydrolysis reaction when a solvent is generated by the reaction, the hydrolysis can be performed without a solvent. After completion of the reaction, it is also preferable to adjust the concentration to an appropriate value as a paint by further adding a solvent. Further, after hydrolysis, an appropriate amount of the produced alcohol or the like may be distilled and removed under heating and / or reduced pressure after the hydrolysis according to the purpose, and then a suitable solvent may be added.
- the amount of the solvent used in the hydrolysis reaction is preferably in the range of 50% by weight to 500% by weight, particularly preferably in the range of 80% by weight to 200% by weight, based on the total amount of the silane conjugate. It is. If the amount of the solvent is less than 50% by weight, the reaction may run away and gel. On the other hand, when the amount of the solvent exceeds 500% by weight, hydrolysis may not proceed.
- water used for the hydrolysis reaction ion-exchanged water is preferable.
- the amount of water can be arbitrarily selected. It is preferably used in the range of 1.0 to 4.0 mol per mol of the silane compound.
- Examples of the curing agent used in the present invention include various curing agents or three-dimensional cross-linking agents that promote curing of the siloxane-based paint or facilitate curing.
- Specific examples of curing agents include nitrogen-containing organic substances, silicone resin curing agents, and various types of metal alcoholates.
- a caramel metal chelate compound is preferably used, such as the stability of the curing agent and the processability of the obtained film.
- metal chelate conjugate used examples include a titanium chelate compound, a zirconium chelate compound, an aluminum chelate compound, and a magnesium chelate conjugate. Of these, aluminum chelates and Z or magnesium chelates having a low refractive index are preferred for the purpose of lowering the refractive index. These metal chelates can be easily obtained by reacting a metal alkoxide with a chelating agent.
- the chelating agent include j8-diketones such as acetinoleacetone, benzoylacetone, and dibenzoylmethane; and j8-keto acid esters such as ethyl acetoacetate and ethyl benzoylacetate.
- Preferred examples of the metal chelate compound include, for example, ethyl acetate acetate aluminum diisopropylate, aluminum tris (ethyl acetate acetate), alkyl acetate aluminum diisopropylate, and aluminum monoacetyl.
- Aluminum chelate compounds such as acetate bis (ethyl acetate), aluminum tris (acetyl acetate), ethyl acetate magnesium monoisopropylate, magnesium bis (ethyl acetate acetate), alkyl acetate magnesium monosodium
- magnesium chelates such as propylate and magnesium bis (acetyl acetonate).
- the amount of the curing agent to be added is preferably from 0.1% by weight to 10% by weight, particularly preferably from 1% by weight to 6% by weight, based on the total amount of the silane conjugate in the siloxane-based paint. It is.
- the total amount of the silane compound means an amount including all of the silane conjugate, its hydrolyzate and its condensate.
- the content When the content is less than 0.1% by weight, the hardness of the obtained coating film decreases. On the other hand, if the content exceeds 10% by weight, curing is sufficient, and the hardness of the obtained coating is improved, but the refractive index is also increased, which is preferable. Absent.
- the siloxane-based coating material of the present invention it is preferable to use a mixture of a solvent having a boiling point of 100 to 180 ° C. under atmospheric pressure and a solvent having a boiling point of less than 100 ° C. under atmospheric pressure.
- a solvent having a boiling point of 100 to 180 ° C under atmospheric pressure By containing a solvent having a boiling point of 100 to 180 ° C under atmospheric pressure, the coating properties of the coating liquid are improved, and a film having a flat surface can be obtained.
- the solvent can be effectively volatilized at the time of forming the film, and a film having high hardness can be obtained. That is, a coating having a flat surface and high hardness can be obtained.
- Specific examples of the solvent having a boiling point of 100 to 180 ° C under atmospheric pressure include ethylene glycol monomethynoateate, ethylene glycol monomethyotenoateate, propylene glycolone monomethyoleateate, and propylene glycolonele.
- the siloxane-based coating composition of the present invention contains a solvent having a boiling point of 100 to 180 ° C under atmospheric pressure.
- the amount is preferably 100% by weight to 700% by weight based on the total silane compound content. If the amount of the solvent is less than 100% by weight, the curing reaction does not proceed at the time of film formation, and the hardness decreases. On the other hand, when the amount of the solvent exceeds 700% by weight, the solvent remains in the film, and the hardness of the obtained film decreases.
- Examples of the solvent having a boiling point of less than 100 ° C under atmospheric pressure include methanol, ethanol, isopropanol, t-butanol, and methylethylketone. These may be used alone or as a mixture.
- the content of the solvent having a boiling point under atmospheric pressure of less than 100 ° C in the siloxane-based coating composition of the present invention is preferably 100% by weight to 5000% by weight based on the total content of the silane conjugate.
- the amount of the solvent is less than 100% by weight, the progress of the curing reaction at the time of film formation is slow.
- the amount of the solvent exceeds 5000% by weight, the unevenness in the amount of the solvent volatilized at the time of forming the film increases, and the smoothness of the film surface deteriorates, so that the hardness of the obtained film decreases.
- the content of the total solvent in the siloxane-based coating composition of the present invention is preferably from 1300% by weight to 9900% by weight, particularly preferably from 1500% by weight to 6000% by weight, based on the total silane compound content. Range. When the total solvent content is less than 1300% by weight or more than 9900% by weight, it becomes difficult to form a film having a predetermined thickness.
- the total amount of the silane compound means an amount including all of the silane conjugate, its hydrolyzate, and its condensate.
- fluorine-containing silanide conjugate represented by the general formula (1) it is also preferable to further add the fluorine-containing silanide conjugate represented by the general formula (1) to the siloxane-based paint of the present invention without hydrolysis. Addition of such a fluorine-containing silane conjugate moves to the interface due to the influence of fluorine during curing, and improves the stain resistance of the coating.
- a preferable addition amount is 0.01% by weight to 10% by weight based on the total amount of the silani conjugate. If the content is less than 0.01% by weight, the coating obtained by curing may not have improved stain resistance. On the other hand, if the content exceeds 10% by weight, the reaction on the film surface may not proceed and the hardness may decrease.
- the siloxane-based coating composition of the present invention further contain a silani conjugate having an unsaturated group represented by the general formula (2) without hydrolysis.
- a silane compound having an unsaturated group is added, the unsaturated group is polymerized at the time of curing to increase the crosslink density, and the hardness is reduced. The pollution is improved.
- a preferable addition amount is 0.01% by weight to 10% by weight based on the total amount of the silani conjugate. If the content is less than 0.01% by weight, the hardness of the cured film may not be improved. On the other hand, if the content exceeds 10% by weight, the reaction on the film surface does not proceed and the hardness may decrease.
- a viscosity modifier, a surfactant, a stabilizer, a coloring agent, a vitreous forming agent, and the like can be added to the siloxane-based coating material of the present invention as needed.
- Various surfactants can be used to improve the flowability during coating.
- the addition of a fluorine-based surfactant is preferred for its ability to further improve the prevention of contamination of the antireflection film.
- the siloxane-based paint of the present invention is applied on a substrate, heated, dried, and cured to form a siloxane-based film.
- the obtained film is homogeneously ridged as described above, and even when observed by TEM, no boundary portion between the silica fine particles and the siloxane-bonded product is observed. That is, the siloxane compound serving as the matrix and the silica fine particles are bonded to each other, so that a coating having high hardness can be obtained.
- the siloxane-based paint of the present invention is stable even if it contains a large amount of silica fine particles, and can obtain a coating having a flat surface.
- microgravure coating spin coating, dip coating, curtain flow coating, rhono-recording, spray coating, flow coating, and the like can be preferably used. From the viewpoint of uniformity of antireflection property, that is, prevention of unevenness of reflected light color, microgravure coating is particularly preferably used.
- the heating and drying conditions should be determined according to the applied base material and the paint, but the treatment is usually performed at a temperature of room temperature or higher and 300 ° C or lower for 0.5 to 240 minutes. Is preferred. Particularly preferred curing temperatures are from 100 to 180 ° C, more preferably from 110 to 150 ° C. C.
- the thickness of the cured film is preferably in the range of 0.001 to 0.5 ⁇ m. Film thickness is 0
- the lower limit of the film thickness is more preferably 0.01 ⁇ m or more, further preferably 0.05 ⁇ m or more, and most preferably 0.07 / zm or more.
- the upper limit of the film thickness is more preferably 0.2 ⁇ m or less, and further preferably 0.15 m or less.
- the film formed by the siloxane-based paint of the present invention can be used as a low-refractive-index layer used for antireflection, a buffer coat for a semiconductor device, a flattening agent, a protective film for a liquid crystal display, an interlayer insulating film, and a conductive film. It can be used as a material for forming a waveguide, a material for a phase shifter, and various protective films. Above all, since both high surface hardness and low refractive index can be achieved, it is particularly suitably used as a low refractive index layer for preventing reflection of optical articles.
- the optical article is an anti-reflection film, an anti-reflection film, an anti-reflection plate, an optical filter, an optical lens, a display, etc., and particularly, as a low refractive index layer such as an anti-reflection sheet or an anti-reflection film. It can be used favorably.
- the refractive index of the coating is preferably 1.25 to: L4.
- the refractive index of the coating is more preferably 1.38 or less from the viewpoint of preventing reflection.
- the substrate used in the present invention is not particularly limited, but when used for an optical article, a transparent substrate is preferably used.
- the transparent substrate specifically refers to a substrate having a haze (index indicating haze) of 40% or less, more preferably 20% or less.
- Specific materials include glass and plastic. Further, there is no problem even if the transparent substrate is colored with a dye, a pigment, or the like.
- plastic materials are particularly preferably used in view of optical properties such as transparency, refractive index, and dispersion, and various physical properties such as impact resistance, heat resistance, durability, mechanical strength, chemical resistance, and moldability. .
- Preferred plastic materials are polyester, especially polyethylene terephthalate, and thermoplastic resins such as unsaturated polyester, acrylonitrile-styrene copolymer, polyvinyl chloride, polyurethane, epoxy resin, and polycarbonate, or thermosetting resin.
- thermoplastic resins such as unsaturated polyester, acrylonitrile-styrene copolymer, polyvinyl chloride, polyurethane, epoxy resin, and polycarbonate, or thermosetting resin.
- a material provided with a hard coat layer capable of imparting high hardness as a transparent base material requires various properties such as adhesion to the coating of the present invention, hardness, chemical resistance, heat resistance, and durability. This is a more preferred embodiment because it is possible to improve the quality.
- Titanium, aluminum- Inorganic fine particles typified by metal oxides such as rubber, silicon and tin, and matrix resins include (meth) acrylic resins, silicone resins, polyurethane resins, melamine resins, and urea. Resins.
- the thickness of the hard coat layer is preferably from 0.2 to 20 ⁇ m! If the film thickness is less than 0.2 ⁇ m, the hardness of the obtained coating decreases. If the film thickness exceeds 20 m, cracks are likely to occur, resulting in poor handling and productivity.
- the lower limit of the film thickness is more preferably 0. 1 or more, more preferably 1 ⁇ m or more.
- the upper limit of the film thickness is more preferably 10 ⁇ m or less.
- a high refractive index layer is preferably provided directly on the transparent substrate or via a hard coat layer for the purpose of enhancing the antireflection property.
- an ultraviolet curable composition is preferably used from the viewpoint of adhesion to a low refractive index siloxane-based film provided on the layer and after-curing properties.
- Examples of the powerful ultraviolet-curable composition include polyfunctional (meth) acrylic compounds containing two or more (meth) atalyloyl groups in the molecule.
- Specific examples of these compounds include mono-, di-, or aliphatic polyfunctional compounds such as triethylene glycol di (meth) acrylate, mono-, di-, or tripropylene glycol di (meth) acrylate.
- the high refractive index layer it is also preferable to include various metal oxides in the high refractive index layer for the purpose of further increasing the refractive index.
- the preferably used metal oxide include a metal oxide selected from the group consisting of zirconium, indium, antimony, zinc, tin, cerium, and titanium having a particle diameter of about 100 nm, and a composite oxide thereof.
- a composite oxide (ITO) composed of indium and tin or a composite oxide (ATO) composed of tin and antimony is conductive in addition to the high refractive index, and is used for the high refractive index layer. Point force that can provide antistatic properties is preferably used.
- the surface resistance of the layer is 1 ⁇ 10 10 ( ⁇ / D) or less. If the surface resistance exceeds 1 ⁇ 10 10 ( ⁇ ⁇ opening), dust and the like are apt to be adhered during use, and foreign matter is likely to be mixed into the film surface during production, which is not preferable.
- the refractive index of the high refractive index layer can be determined according to the refractive index of the base material and the refractive index of the low refractive index layer.
- the refractive index of the high refractive index layer is preferably from 1.45 to 2.0. More preferably, it is 1.5 to 1.68. If the refractive index of the high refractive index layer is less than 1.45, it is difficult to obtain an antireflection effect. If the refractive index is 2.0 or more, the difference between the refractive index of the low refractive index layer and the refractive index becomes large, making optical setting difficult.
- the thickness of the high refractive index layer is 40 ⁇ ! 200200 nm is preferred 60 ⁇ m to 150 nm is more preferred.
- the optical article of the present invention has a siloxane-based coating on a transparent substrate.
- the elemental content of tetrafunctional silicon with respect to all silicon in the siloxane-based coating is 0.3 to 0.6.
- the surface hardness of the coating increases and the refractive index of the coating decreases.
- the higher the surface hardness of the coating the better the scratch resistance of the optical article.
- the refractive index of the coating is low, the antireflection property of the optical article is improved.
- the tetrafunctional silicon means a silicon atom in which the elements bonded to the silicon are all oxygen. Its existing state may be a crystalline state or an amorphous state.
- trifunctional silicon and bifunctional silicon are listed as main ones. Is also good.
- trifunctional silicon means a silicon atom in which three of the elements bonded to silicon are oxygen and one is another element. The same applies to bifunctional and monofunctional silicon.
- the elemental content of the tetrafunctional silicon with respect to all the silicon in the coating is high, the hardness of the coating increases but the refractive index does not decrease.
- the elemental content of the tetrafunctional silicon is low, the refractive index of the coating is low, but the hardness is low.
- the fluorine content of silicon in the coating is 0.4 to 0.6. If the content of fluorine relative to silicon in the coating is less than 0.40, the refractive index will not decrease. On the other hand, if the content of fluorine with respect to silicon exceeds 0.60, the surface hardness of the coating decreases.
- the content of fluorine to carbon in the coating must be 0.40 to 0.65.
- the presence state and element content of silicon, and the element content of fluorine and carbon can be analyzed by ESCA (X-ray photoelectron spectroscopy) or the like. Since composition distribution generally occurs on the surface and inside of the coating, it is desirable to strip most of the coating, pulverize it into a powder, and then measure.
- ESCA X-ray photoelectron spectroscopy
- the refractive index of the coating is set to 1.25 to: L40, an optical article having excellent antireflection properties can be realized.
- the refractive index of the coating is more preferably 1.38 or less from the viewpoint of antireflection properties.
- the refractive index of a film in order to accurately measure the refractive index of the film, it is preferable to apply a siloxane-based paint on a silicon wafer to form a film, and measure the film with a phase difference measuring device.
- the refractive index of a film provided on a substrate such as a film can be determined by using an ellipsometer.
- the range of the number of layers of the respective layers forming the anti-reflection film and the range of the refractive index can be obtained by using an optical calculation simulation.
- the siloxane-based coating preferably contains silica fine particles as described above. This makes it possible to control the elemental content of the tetrafunctional silicon with respect to all the silicon atoms in the coating, and to easily increase the surface hardness of the coating and decrease the refractive index of the coating.
- the silica fine particles the silica fine particles having a cavity inside as described above are particularly preferable.
- the siloxane-based coating is preferably uniformed. As a result, a coating having excellent surface hardness can be obtained, and an optical article having excellent scratch resistance can be obtained.
- the siloxane-based coating preferably further contains an aluminum compound and a Z or magnesium compound.
- aluminum compound and Z or magnesium The compound is the residue of the aluminum chelate compound and the Z or magnesium chelate compound used as a curing agent for the siloxane-based paint. These compounds are preferable because they have a low refractive index and do not hinder the low refractive index even if they remain in the coating.
- the optical article of the present invention preferably has a high refractive index layer between the transparent substrate and the siloxane-based coating in order to enhance the antireflection property as described above. Further, it is preferable to have a hard coat layer on the transparent substrate as described above. That is, the optical article of the present invention preferably has a transparent substrate, a hard coat layer, a high refractive index layer, and a siloxane-based coating in this order. Further, as described above, the high refractive index layer may also serve as the hard coat layer. In this case, the optical article of the present invention preferably has a transparent substrate, a high refractive index layer, and a siloxane-based coating in this order.
- a high refractive index / antistatic layer coating liquid CFSR Co., Ltd., “OPSTAR (registered trademark)“ TU4005) was applied to the hard coat layer forming surface so that the dry thickness became 90 nm.
- the coating was performed with a microgravure coater, dried at 120 ° C for 1 minute, and cured by irradiating ultraviolet rays (100MjZcm 2 ) to form a high refractive index antistatic layer on the hard coat layer.
- the film obtained in It was used.
- a siloxane-based paint which will be described later, as a low-refractive-index layer, is coated with one of paints A to F and A1 to C1 so that the dry thickness becomes lOnm.
- the coating was performed with a microgravure coater. Then dry and cure at 130 ° C for 1 minute.
- Refractive index A low refractive index layer was formed on the antistatic layer to obtain an antireflection film.
- a siloxane-based paint one of paints A to F and A1 to C1 described below, was applied on a silicon wafer using a spin coater so as to have a thickness of 0.1 ⁇ m. Then, the coating was obtained by heating and curing at 130 ° C. for 1 minute using an inert oven INH-21CD (manufactured by Koyo Thermo System Co., Ltd.).
- the refractive index at 633 nm was measured by a phase difference measuring device (NPDM-1000, manufactured by Nikon Corporation).
- the surface on the side opposite to the measurement surface (the surface on which the low refractive index layer is provided) of the anti-reflection film prepared above is waterproofed to 320 to 400 so that the glossiness (JIS Z 8741) is 10 or less at 60 ° C. After roughening uniformly with sandpaper, black paint was applied and colored so that the visible light transmittance was 5% or less.
- the measurement surface was measured with a spectrophotometer (UV-3150) manufactured by Shimadzu Corporation at an incident angle of 5 degrees from the measurement surface and in the wavelength range of 380 ⁇ ! The absolute reflection spectrum at ⁇ 800 nm was measured, and the lowest reflectance in the wavelength region of 400-700 nm was determined. When the minimum reflectance is 0.6% or less, good antireflection properties can be obtained.
- the cross section of the low refractive index layer of the antireflection film prepared above was observed at an accelerating voltage of 100 kV using a transmission electron microscope (H-7100FA manufactured by Hitachi). Sample preparation was performed using the ultra-thin section method.
- H-7100FA transmission electron microscope
- the surface of the low refractive index layer of the antireflection film prepared above was measured using X-ray photoelectron analysis (ESCA).
- ESCA X-ray photoelectron analysis
- the composition ratio of each element can be known from the element composition (atomic%) obtained by ESCA.
- the ratio of tetrafunctional silicon to trifunctional or less silicon can be known by peak division of Si2P.
- FIGS. 1 and 2 show cross-sectional TEM photographs of the obtained coating film.
- the cavities 1 inside the silica fine particles look like white circles.
- the outer shell of the silica fine particles and the siloxane compound exist outside the cavity. Both of the members were homogenous, and the boundary between them was not observed.
- the elemental content of tetrafunctional silicon with respect to all silicon was 0.505
- the elemental content of fluorine with respect to all silicon was 0.445
- the carbon in the coating was determined.
- the elemental content of fluorine is 0.562.
- the resulting solution was heated at a bath temperature of 40 ° C for 2 hours, and then the solution was heated at a bath temperature of 85 ° C for 2 hours, the internal temperature was raised to 80 ° C, and the solution was heated for 1.5 hours. Thereafter, the mixture was cooled to room temperature to obtain a polymer solution B.
- Methyltrimethoxysilane 109.Og (0.8 mol), heptadecafluorodecyltrimethoxysilane 56.8 g (0.Imol), dimethyldimethoxysilane 12 g (0.Imol) were dissolved in diacetone alcohol 300 g and isopropanol 100 g. . 250 g of a silica sol (trade name: MIBK-ST, manufactured by Nissan Chemical Industries, Ltd., solid content: 30%) having a number average particle diameter of 12 nm and having no cavities dispersed therein is dispersed in methyl isobutyl ketone.
- a silica sol trade name: MIBK-ST, manufactured by Nissan Chemical Industries, Ltd., solid content: 30%
- the obtained solution is heated at a bath temperature of 30 ° C for 3 hours, and then the solution is heated at a bath temperature of 85 ° C for 2 hours. After heating, the internal temperature was raised to 80 ° C., the mixture was heated for 2 hours, and then cooled to room temperature to obtain a polymer solution D.
- the resulting solution was heated at a bath temperature of 40 ° C for 2 hours, and then the solution was heated at a bath temperature of 75 ° C for 2 hours, the internal temperature was raised to 70 ° C, and the solution was heated for 1.5 hours. Thereafter, the mixture was cooled to room temperature to obtain a polymer solution F.
- the elemental content of tetrafunctional silicon with respect to all silicon was 0.333
- the elemental content of fluorine with respect to all silicon was 0, and fluorine with respect to carbon in the coating was determined.
- Example 1 the addition amount of the silani conjugate was 88.4 g of methyltrimethoxysilane, 76.3 g of trifluoropropyltrimethoxysilane, and dispersion of silica fine particles having a cavity inside the outer shell having a number average particle diameter of 50 nm.
- Liquid isopropanol dispersion type, solid content concentration: 20.5%, manufactured by Catalyst Chemical Industry Co., Ltd.
- All procedures were the same as in Example 1 except for changing to 263.4 g, to obtain a polysiloxane-based coating material H.
- Using the obtained paint H a film was formed on a substrate and a silicon wafer as described above, and the refractive index, the reflectance, the storage stability, the hardness, and the stain resistance were evaluated.
- the elemental content of tetrafunctional silicon with respect to all silicon was 0.47
- the elemental content of fluorine with respect to all silicon was 0.55
- the carbon content in the coating was determined.
- the elemental content of fluorine is 0.62.
- Example 3 Same as Example 3 except that the added amount of silica fine particle sol was changed from 250 g to 56 g. Then, paint I was obtained. Using the obtained paint I, a siloxane-based coating film was formed on a substrate and a silicon wafer as described above, and the refractive index, the reflectance, the storage stability, the hardness, and the stain resistance were evaluated.
- the elemental content of tetrafunctional silicon with respect to all silicon was 0.22
- the elemental content of fluorine with respect to all silicon was 1.33
- the content of carbon with respect to carbon in the coating was 1.33.
- the elemental content of fluorine is 0.85.
- silica fine particle dispersion having a cavity inside the outer shell was added to the obtained silanol solution A1, and 299.7 g of an aluminum-based curing agent.
- Aluminum tris (acetyl acetate) (trade name: Aluminum Chelate A (W), manufactured by Kawaken Fine Chemical Co., Ltd.) 4.8 g dissolved in 125 g of methanol was added, and 1600 g of isopropanol and 550 g of propylene glycol monomethyl ether was added, and the mixture was stirred at room temperature for 2 hours to obtain a siloxane-based coating A1.
- FIGS. 3 and 4 show cross-sectional TEM photographs of the obtained coating film.
- the cavities 1 inside the silica fine particles appear as white circles.
- the outer shell 2 of the silica fine particles is observed as a dark-colored thin layer so as to cover the outside of the cavity.
- a layer 3 composed of a siloxane compound is observed outside the layer as a light-colored matrix.
- a boundary portion 4 between the silica fine particles and the siloxane-bonded product is clearly observed, and it can be seen that the two are homogeneously bonded.
- silanol solution B1 a sol of silica fine particles dispersed in isopropanol and having a number average particle diameter of 12 nm and having no voids therein (trade name: IPA-ST, manufactured by Nissan Chemical Industries, Ltd., solid content 30 %) 210 g and aluminum tris (acetyl acetate) (trade name: Aluminum Chelate A (W), manufactured by Kawaken Fine Chemicals Co., Ltd.) as an aluminum-based curing agent were prepared by dissolving 4.8 g in 250 g of methanol. Then, 1800 g of isopropanol and 800 g of propylene glycol monomethyl ether were added, and the mixture was stirred at room temperature for 2 hours to obtain a siloxane-based coating material B1.
- a siloxane-based coating material C1 was obtained in the same manner as in Example 1, except that the silica fine particle dispersion was not added in Example 1.
- a film was formed on a substrate and a silicon wafer as described above, and the refractive index, the reflectance, the storage stability, the hardness, and the stain resistance were evaluated.
- the elemental content of tetrafunctional silicon with respect to all silicon was 0, the elemental content of fluorine with respect to all silicon was 0.89, and the elemental content of fluorine with respect to carbon in the coating was 0%. 0.56.
- Comparative Example 1 the amount of methyltrimethoxysilane was 122.4 g, the amount of trifluoropropoyltrimethoxysilane was 21.8 g, and a silica fine particle dispersion having a cavity inside the outer shell (isopropanol dispersion type, solid content (Concentration: 20.5%, manufactured by Catalyst Kasei Kogyo Co., Ltd.) Except for changing each to 75.6 g, the same procedure was performed as in Comparative Example 1 to obtain a fluorine-containing organic polysiloxane-based coating material D1. As described above, a film was formed on the substrate and the silicon wafer using the obtained paint D1, and the refractive index, the reflectance, the storage stability, the hardness, and the stain resistance were evaluated.
- the element content of tetrafunctional silicon with respect to all silicon was 0.2.
- the elemental content of fluorine with respect to all silicon is 0.24
- the elemental content of fluorine with respect to carbon in the coating is 0.25.
- Example 1 A 50 40 1.36 good 4 good
- the film formed by the siloxane-based paint of the present invention can be used for an anti-reflection layer, a low refractive index layer, a buffer coat for a semiconductor device, a flattening agent, a protective film for a liquid crystal display, an interlayer insulating film, a conductive film. It can be used as a material for forming a waveguide, a material for a phase shifter, and various protective films.
- the optical article of the present invention is suitably used for an antireflection film, an antireflection film, an antireflection plate, an optical filter, an optical lens, a display, and the like.
- anti-reflective sheets and films used for display surfaces of display devices CRT, LCD, PDP, EL, FED, etc.
- front filters, window glasses, show window glasses, instrument covers, watch cover glasses, etc. It is preferably used.
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Abstract
Description
Claims
Priority Applications (4)
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CN2005800191953A CN1969023B (zh) | 2004-06-11 | 2005-06-10 | 硅氧烷系涂料、光学制品及硅氧烷系涂料的制备方法 |
US11/628,798 US20070266896A1 (en) | 2004-06-11 | 2005-06-10 | Siloxane-Based Coating Material, Optical Article, and Production Method of Siloxane-Based Coating Material |
EP05749049A EP1760126A4 (en) | 2004-06-11 | 2005-06-10 | SILOXANE COATING MATERIAL, OPTICAL ARTICLES AND PROCESSES FOR THE PRODUCTION OF SILOXANE COATING MATERIALS |
JP2006514574A JPWO2005121265A1 (ja) | 2004-06-11 | 2005-06-10 | シロキサン系塗料、光学物品およびシロキサン系塗料の製造方法 |
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Also Published As
Publication number | Publication date |
---|---|
EP1760126A1 (en) | 2007-03-07 |
TW200604008A (en) | 2006-02-01 |
EP1760126A4 (en) | 2010-02-24 |
JPWO2005121265A1 (ja) | 2008-04-10 |
CN1969023B (zh) | 2011-09-14 |
US20070266896A1 (en) | 2007-11-22 |
CN1969023A (zh) | 2007-05-23 |
TWI364367B (en) | 2012-05-21 |
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