JP2008106036A - Polymerizable fluorine-containing compound, antireflective membrane using the same, antireflective film, image display device, fluorine-containing alcohol for polyurethane and composition containing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a polymerizable fluorine-containing compound which can be suitably used for forming a polymer having a low reflective index and high hardness, and being stable to external stimulation such as pollution and shear. <P>SOLUTION: The polymerizable fluorine-containing compound is represented by general formula (I) (wherein, Rf<SB>1</SB>and Rf<SB>2</SB>contain at least a carbon atom and a fluorine atom, and may contain an oxygen atom and/or a hydrogen atom). The fluorine content is ≥35 mass% of the molecular weight of the fluorine-containing compound, and the calculated values of molecular weights between crosslinks of the polymer prepared by the polymerization thereof are each ≤300. The fluorine-containing alcohol is also represented by general formulas (II) or (III). <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a polymerizable fluorine-containing compound, an antireflection film, an antireflection film and an image display device using the same. More specifically, the present invention relates to a polymerizable fluorine-containing compound suitable for forming a low refractive index layer excellent in scratch resistance, an antireflection film, an antireflection film and an image display device using the same. The present invention also relates to a composition for water-repellent polyurethane having excellent scratch resistance after curing.

The fluorine-containing polyfunctional monomer gives a polymer having a low refractive index and a high hardness by using it as a polymer crosslinking agent or by polymerizing itself. Such fluoropolymers are excellent in antifouling properties and are used in fields such as antireflection films, optical fiber cladding materials and paints. As fluorine-containing polyfunctional monomers, 2 to 4 and 6 functional fluorine-containing polyfunctional (meth) acrylic acid esters have been known so far (see, for example, Patent Documents 1 to 6). However, these fluorine-containing polyfunctional monomers have a high refractive index, and if the fluorine content is increased to improve the refractive index, the scratch resistance is lowered. Further, in the conventional production method, it has been difficult to selectively obtain a desired compound in a high yield in the synthesis of a fluorine-containing intermediate before introducing a polymerizable group (Patent Document 7). On the other hand, an attempt has been made to efficiently synthesize a desired fluorine-containing intermediate using a liquid phase fluorination technique, thereby improving the above problems (Patent Document 8). However, there is still room for improvement in refractive index and scratch resistance.
On the other hand, a fluorine-containing diol-containing polyurethane composition that is excellent in compatibility and can give a cured product free of tack or bleed is known as an example of use of a fluorine-containing alcohol that is a fluorine-containing polyfunctional monomer intermediate (patent) Reference 9). This cured product is excellent in water repellency, waterproofness, antifouling property, weather resistance and the like and is useful as various coating agents and protective agents, but has insufficient hardness and has a problem in scratch resistance.
JP 2001-330706 A JP 2001-262011 A JP 2001-40249 A JP 2000-1111716 A Japanese Patent Laid-Open No. 11-60637 Japanese Patent Laid-Open No. 10-182746 JP-A 63-265920 JP 2006-28280 A JP 7-316500 A

  An object of the present invention is to provide a polymerizable fluorine-containing compound which has a low refractive index and a high hardness and gives a polymer which is stable against external stimuli such as contamination and shearing. Further, the present invention is a coating-type antireflection film suitable for mass production, having a low refractive index layer having a low reflectance, high hardness, and excellent scratch resistance, using the polymerizable fluorine-containing compound described above. An object is to provide an antireflection film and an image display device. Furthermore, the present invention provides a polyfunctional fluorine-containing alcohol suitable for a polyurethane composition excellent in compatibility, free of tack and bleed, and capable of giving a cured product excellent in scratch resistance, and a polyurethane composition containing the same. Objective.

Means for solving the problems are as follows.
(1) A polymerizable fluorine-containing compound represented by the following general formula (I) having a fluorine content of 35% by mass or more with respect to the molecular weight of the fluorine-containing compound. A polymerizable fluorine-containing compound characterized in that the calculated molecular weight between crosslinks of the obtained polymer is 300 or less.

[Wherein, Rf ₁ represents a linear or cyclic (m + n) -valent fluorinated hydrocarbon group containing at least a carbon atom and a fluorine atom, and may contain an oxygen atom and / or a hydrogen atom. Rf ₂ represents a linear or cyclic monovalent fluorinated hydrocarbon group containing at least a carbon atom and a fluorine atom, and may contain an oxygen atom and / or a hydrogen atom. m and n each independently represents an integer of 0 or more (provided that m + n ≧ 2). Q represents a polymerizable group. However, the plurality of Rf ₂ may be the same or different, and when n is 2 or more, the plurality of Q may be the same or different. ]
(2) In the general formula (I), Q is —COC (R ₀ ) ═CH ₂ , an allyl group, an epoxyalkylene group, — (CH ₂ ) _x Si (OW) ₃ , — (CH ₂ ) _y NCO or — (CH ₂ ) _z CN (wherein R ₀ represents a hydrogen atom, a halogen atom or an alkyl group which may have a substituent. W represents an alkoxy group or a hydroxyl group. X, y and z are each 1 or more. The three fluorine atoms may be different from each other.) The polymerizable fluorine-containing compound according to (1),
(3) The polymerizable fluorine-containing compound according to (1) or (2), wherein the compound represented by the general formula (I) is a compound represented by the following general formula (Ia).

[Wherein, Rf ₁ , Rf ₂ , m and n each have the same meaning as in the general formula (I), and R represents a hydrogen atom, a fluorine atom, a methyl group or a trifluoromethyl group. ]
(4) The polymerizable fluorine-containing compound according to (3), wherein R is a hydrogen atom in the compound represented by the general formula (Ia).
(5) The polymerizable fluorine-containing compound according to any one of (1) to (4), wherein m is 0 and n is an integer of 3 to 6.
(6) The polymerizable fluorine-containing compound according to any one of (1) to (5), wherein Rf ₂ is a trifluoromethyl group.
(7) The polymerizable fluorine-containing compound according to any one of (1) to (6), which is produced using a liquid phase fluorination technique.
(8) It has a low refractive index layer formed by curing a curable resin composition containing at least one polymerizable fluorine-containing compound according to any one of (1) to (7). Antireflection film.
(9) It has a low refractive index layer formed by curing a curable resin composition containing the polymerizable fluorine-containing compound and inorganic oxide fine particles according to any one of (1) to (7). Anti-reflective film characterized.
(10) The antireflection film as described in (9), wherein the inorganic oxide fine particles are hollow silica fine particles.
(11) An antireflection film, wherein the antireflection film according to any one of (8) to (10) is provided on a transparent support.
(12) An image display device comprising the antireflection film according to (11).
(13) A composition for water-repellent polyurethane comprising at least (A) a polyol compound, (B) a polyisocyanate compound and (C) a fluorinated alcohol represented by the following general formula (II) and / or (III).

[Wherein, Rf ₁ represents a linear or cyclic q-valent fluorinated hydrocarbon group containing at least a carbon atom and a fluorine atom, and may contain an oxygen atom and / or a hydrogen atom. q represents an integer of 2 or more. Rf ₂ represents a linear or cyclic monovalent fluorinated hydrocarbon group containing at least a carbon atom and a fluorine atom, and may contain an oxygen atom and / or a hydrogen atom. In the above formula, the hydrogen atom of the hydroxyl group of the methylol group may be substituted with a polymerizable group Q (preferably Q is the same as that described in the above item (2)), and the compound into which Q is introduced. The fluorine content of the compound is 35% by mass or more with respect to the molecular weight of the compound, and when the compound is polymerized, the calculated values of the molecular weight between crosslinks of the polymer obtained by polymerization are all 300 or less. When n is 2 or more, the plurality of Qs may be the same or different. ]
(14) For water-repellent polyurethane comprising at least one of (A) a polyol compound, (B) a polyisocyanate compound and (C) a fluorinated alcohol represented by the following formula (II-1) or (III-1) Composition.

（１５）下記一般式（II）または（III）で表される含フッ素アルコール。

(15) A fluorinated alcohol represented by the following general formula (II) or (III).

[Wherein, Rf ₁ represents a linear or cyclic q-valent fluorinated hydrocarbon group containing at least a carbon atom and a fluorine atom, and may contain an oxygen atom and / or a hydrogen atom. q represents an integer of 2 or more. Rf ₂ represents a linear or cyclic monovalent fluorinated hydrocarbon group containing at least a carbon atom and a fluorine atom, and may contain an oxygen atom and / or a hydrogen atom. In the above formula, the hydrogen atom of the hydroxyl group of the methylol group may be substituted with a polymerizable group Q, and the fluorine content of the compound into which Q is introduced is 35% by mass or more with respect to the molecular weight of the compound. When the polymer is polymerized, the calculated values of the molecular weight between crosslinks of the polymer obtained by polymerization are all 300 or less. When n is 2 or more, the plurality of Qs may be the same or different. ]
(16) A fluorinated alcohol represented by the following general formula (II-1) or (III-1).

The polymerizable fluorine-containing compound of the present invention can be polymerized to give a polymer having a low refractive index and excellent hardness, and excellent scratch resistance and antifouling properties. Further, the antireflection film and the antireflection film obtained from the above-described excellent polymerizable fluorine-containing compound have low reflectance and high hardness and excellent scratch resistance, and an image display device using the antireflection film and antireflection film is an image display unit. In addition, the display surface can be prevented from being deteriorated due to contamination of the display surface or reflection of external light.
In addition, the polyurethane composition containing the polyfunctional fluorine-containing alcohol of the present invention is excellent in compatibility, free of tack and bleed, gives a cured product excellent in scratch resistance, water repellency, waterproofness, antifouling property, It can be used as a coating agent or protective agent excellent in weather resistance and the like.

The present invention will be described in detail below.
The polymerizable fluorine-containing compound represented by the general formula (I) of the present invention will be described.

Ｒｆ_１は少なくとも炭素原子及びフッ素原子を含み、酸素原子及び／又は水素原子を含んでもよい、鎖状又は環状の、（ｍ＋ｎ）価のフッ化炭化水素基であり、該化合物を重合させたとき、後述する架橋間分子量の計算値が３００以下になるように選ばれたものである。また、Ｒｆ_１における水素原子数／フッ素原子数は１／４以下が好ましく、より好ましくは１／９であり、水素原子を実質的に含まないことが特に好ましい。ｍおよびｎはそれぞれ独立に、０以上の整数であり、ｍ＋ｎ≧２である。好ましくは、ｍ＜ｎでかつｎは２〜１０（より好ましくは３〜６の整数）の整数である。Ｒｆ_１の具体例を以下に示すが、本発明はこれらに限定されるものではない。

Rf ₁ is a chain or cyclic (m + n) -valent fluorinated hydrocarbon group containing at least a carbon atom and a fluorine atom, and may contain an oxygen atom and / or a hydrogen atom, and when the compound is polymerized The calculation value of the molecular weight between crosslinks described later is selected to be 300 or less. Further, the number of hydrogen atoms / number of fluorine atoms in Rf ₁ is preferably ¼ or less, more preferably 1/9, and particularly preferably substantially free of hydrogen atoms. m and n are each independently an integer of 0 or more, and m + n ≧ 2. Preferably, m <n and n is an integer of 2 to 10 (more preferably an integer of 3 to 6). Specific examples of Rf ₁ are shown below, but the present invention is not limited thereto.

Rf ₂ represents a linear or cyclic monovalent fluorinated hydrocarbon group containing at least a carbon atom and a fluorine atom, and may contain an oxygen atom and / or a hydrogen atom. Rf ₂ is preferably a linear or branched perfluoroalkyl group having 1 to 12 carbon atoms (for example, trifluoromethyl, perfluoroethyl, perfluoropropyl, etc.) or a perfluorocycloalkyl group having 3 to 12 carbon atoms (for example, perfluoropentyl, Perfluorocyclohexyl and the like, more preferably the above-mentioned perfluoroalkyl group, and most preferably a trifluoromethyl group.

Q represents a polymerizable group, and is preferably a radical, a cation, or a condensation polymerizable group, and —COC (R ₀ ) ═CH ₂ , an allyl group, an epoxyalkylene group, — (CH ₂ ) _X Si (OW ) ₃ , — (CH ₂ ) _y NCO or — (CH ₂ ) _z CN is more preferable. Here, R ₀ represents a hydrogen atom, a halogen atom or an alkyl group which may have a substituent, W represents an alkoxy group or a hydroxyl group, x, y and z each represents an integer of 1 or more, W may be different from each other. Each of x, y, and z is preferably 1 to 5, and more preferably 1 to 3. The substituent for the alkyl group in R ₀ may be any substituent, but is preferably a halogen atom. Here, the plurality of Rf ₂ may be the same or different, and when n is 2 or more, the plurality of Q may be the same or different. In the present invention, when there are a plurality of Rf ₂ and a plurality of Q, it is preferable that the plurality of Rf ₂ are the same and the plurality of Q are the same.

  The compound represented by the general formula (I) is preferably a compound represented by the following general formula (Ia).

式中、Ｒｆ_１、Ｒｆ_２、ｍおよびｎはそれぞれ前記一般式（Ｉ）と同義であり、Ｒは水素原子、フッ素原子、メチル基またはトリフルオロメチル基を表し、水素原子であることが好ましい。

In the formula, Rf ₁ , Rf ₂ , m and n each have the same meaning as in the general formula (I), and R represents a hydrogen atom, a fluorine atom, a methyl group or a trifluoromethyl group, and is preferably a hydrogen atom. .

  The epoxy alkylene group is preferably an epoxy methylene group.

  In the polymerizable fluorine-containing compound of the present invention, the fluorine content is 35% by mass or more of the molecular weight, preferably 35 to 70% by mass, and more preferably 37 to 60% by mass.

  Specific examples of the compound represented by formula (I) are shown below, but the present invention is not limited thereto.

In the polymerizable fluorine-containing compound of the present invention, from the viewpoint of crosslinking density, when all the polymerizable groups of the polymerizable fluorine-containing compound are polymerized, all the calculated values of the intercrosslinking molecular weight of the polymer obtained by the polymerization are 300 or less. It becomes. The calculated value of the molecular weight between crosslinks is a polymer in which all the polymerizable groups of the polymerizable fluorine-containing compound (hereinafter also referred to as fluorine-containing polyfunctional monomer) are polymerized, and a total of 3 or more carbon atoms and / or silicon atoms. When (a) represents a substituted carbon atom, and (b) represents a silicon atom substituted with 3 or more carbon atoms and / or oxygen atoms, (a) and (a), (b) and (b) Or the total atomic weight of the atomic group sandwiched between (a) and (b).
Here, the molecular weight between crosslinks is the molecular weight between crosslinks in the monomer that is the polymerizable fluorine-containing compound, and the polymerizable group differs from the target polymerizable fluorine-containing compound by copolymerization. It reacts with the polymerizable group of the molecule to produce the atom (a) or (b). Therefore, such atoms and those atoms not involved in the polymerization in the monomer of interest are included.
For example, description will be given by taking M17 as an example among the fluorine-containing polyfunctional monomers. Assuming that all the polymerizable groups of M17 are polymerized, the following formula is obtained.

In this case, the partial structure (atomic group) that is the target of calculation of the molecular weight between crosslinks defined above is a portion surrounded by a broken line in the above formula (here, —CF ₂ OCF (CF ₃ ) CH ₂ OCO— Is surrounded by a broken line, but the other same part (5 places is also a partial structure subject to calculation of molecular weight between crosslinks), and the calculated value of molecular weight between crosslinks is C ₂ F ₄ O = 116.0 and C ₅ H ₂ F ₆ O ₃ = 224.1, both of which are 300 or less.

  The calculated value of the molecular weight between crosslinks is more preferably 250 or less, and still more preferably 200 or less. When the molecular weight between crosslinks when all the polymerizable groups of the fluorine-containing polyfunctional monomer are polymerized exceeds 300, the hardness when formed into a coating film is lowered, and further, the antifouling property and scratch resistance are deteriorated.

Next, the manufacturing method of the polymeric fluorine-containing compound represented by general formula (I) of this invention is demonstrated.
The method for synthesizing the polymerizable fluorine-containing compound represented by the general formula (I) is not particularly limited. However, from the viewpoint of the degree of freedom in molecular design and cost, US Pat. No. 5,093,432 and International Patent No. 00 It is preferable to utilize the liquid phase fluorination reaction described in the specification of / 56694. As a synthesis route of the polymerizable fluorine-containing compound represented by the general formula (I) using the liquid phase fluorination reaction, for example, the following as a starting material using a (m + n) -valent hydroxyl group-containing hydrocarbon compound Although it can synthesize | combine by a route, this invention is not limited to these.

[Fluoropolymer]
The fluorine-containing polyfunctional monomer (polymerizable fluorine-containing compound) can be used as a fluorine-containing polymer by various polymerization methods. In the polymerization, homopolymerization or copolymerization may be performed, and furthermore, it may be used as a crosslinking agent.

  As other monomers to be copolymerized, usual monomers can be used. Particularly, typical monomers include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, 2- Trifluoroethyl (meth) acrylate, 2,3-pentafluoropropyl (meth) acrylate, 1H, 1H, 5H-octafluoropentyl (meth) acrylate, 1H, 1H, 7H-dodecafluoroheptyl (meth) acrylate, 1H, 1H, 9H-hexadecafluorononyl (meth) acrylate, 2- (perfluorobutyl) ethyl (meth) acrylate, 2- (perfluorohexyl) ethyl (meth) acrylate, 2- (perfluorooctyl) ethyl (meth) Acrylate, allyl alcohol, ethanol Le allyl ether, alpha-fluoro acrylic acid methyl ester, vinyl acetate, ethyl vinyl ketone, radical polymerizable monomers such as butyl vinyl ketone,

  Tetraethoxysilane, ethyltrimethoxysilane, chlorotrimethoxysilane, aminopropyltriethoxysilane, vinyltrimethoxysilane, γ-glycidoxypropyltriethoxysilane, γ-methacryloxypropyltrimethoxysilane, γ-mercaptopropyltrimethoxy Silane, or condensation polymerizable monomers represented by the following chemical formula:

  Glycerol diglycidyl ether, glycerol triglycidyl ether, 1,1,1-trimethylolpropane triglycidyl ether, sorbitol polyglycidyl ether, bisphenol-A-diglycidyl ether, hydroquinone diglycidyl ether, resorcin diglycidyl ether, fluoroglycinol tri And cationically polymerizable monomers such as glycidyl ether, triglycidyl isocyanurate, ethyl vinyl ether, cyclohexyl vinyl ether, and the like. Among these, from the viewpoint of polymerizability, radical or cation polymerizable monomers are preferable, and radical polymerizable monomers are more preferable.

  The polymerization reaction is preferably bulk polymerization or solution polymerization. In order to obtain a thin film, it is preferable to perform polymerization after applying the curable resin composition containing the polymerizable fluorine-containing compound of the present invention on a substrate and volatilizing the solvent. In this case, in the curable resin composition, the content of the polymerizable fluorine-containing compound of the present invention is not particularly limited, but is preferably 5 to 100% by mass, more preferably 10 to 100% by mass, and 50 More preferably, it is -100 mass%, It is especially preferable that it is 60-100 mass%. The polymerization initiation method includes a method using a radical initiator, a method of irradiating light or radiation, a method of adding an acid, a method of irradiating light after adding a photoacid generator, a method of dehydrating condensation by heating, and the like. These polymerization methods and polymerization initiation methods are described in, for example, Tsuruta Shinji, “Polymer Synthesis Method” revised edition (published by Nikkan Kogyo Shimbun, 1971), Takatsu Otsu and Masato Kinoshita, “Experimental Methods for Polymer Synthesis” ", Chemistry Dojin, 1972, pp. 124-154.

  Examples of the solvent used include ethyl acetate, butyl acetate, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, tetrahydrofuran, dioxane, N, N-dimethylformamide, N, N-dimethylacetamide, benzene, toluene, acetonitrile, methylene chloride, Examples include chloroform, dichloroethane, methanol, ethanol, 1-propanol, 2-propanol, 1-butanol and the like. These may be used alone or in combination of two or more.

  As the initiator for radical polymerization, any form of those generating radicals by the action of heat or those generating radicals by the action of light is possible.

As the compound that initiates radical polymerization by the action of heat, organic or inorganic peroxides, organic azo, diazo compounds, and the like can be used.
Specifically, benzoyl peroxide, halogen benzoyl peroxide, lauroyl peroxide, acetyl peroxide, dibutyl peroxide, cumene hydroperoxide, butyl hydroperoxide as organic peroxides, hydrogen peroxide, peroxides as inorganic peroxides. Ammonium sulfate, potassium persulfate, etc., 2-azo-bis-isobutyronitrile, 2-azo-bis-propionitrile, 2-azo-bis-cyclohexanedinitrile, etc. as organic azo compounds, diazoaminobenzene as diazo compounds, Examples thereof include p-nitrobenzenediazonium.

When a compound that initiates radical polymerization by the action of light is used, the coating is cured by irradiation with active energy rays.
Examples of such radical photopolymerization initiators include acetophenones, benzoins, benzophenones, phosphine oxides, ketals, anthraquinones, thioxanthones, azo compounds, peroxides, 2,3-dialkyldione compounds , Disulfide compounds, fluoroamine compounds and aromatic sulfoniums. Examples of acetophenones include 2,2-diethoxyacetophenone, p-dimethylacetophenone, 1-hydroxydimethylphenyl ketone, 1-hydroxycyclohexyl phenyl ketone, 2-methyl-4-methylthio-2-morpholinopropiophenone and 2 -Benzyl-2-dimethylamino-1- (4-morpholinophenyl) -butanone is included. Examples of benzoins include benzoin benzene sulfonate, benzoin toluene sulfonate, benzoin methyl ether, benzoin ethyl ether and benzoin isopropyl ether. Examples of the benzophenones include benzophenone, 2,4-dichlorobenzophenone, 4,4-dichlorobenzophenone and p-chlorobenzophenone. Examples of phosphine oxides include 2,4,6-trimethylbenzoyldiphenylphosphine oxide. Sensitizing dyes can also be used in combination with these photoradical polymerization initiators.

  The amount of the radical polymerization initiator added is not particularly limited as long as the radical reactive group is an amount capable of initiating a polymerization reaction, but is generally 0.1 to the total solid content in the curable resin composition. 15 mass% is preferable, More preferably, it is 0.5-10 mass%, Most preferably, it is 2-5 mass%.

  The polymerization temperature is not particularly limited, but may be appropriately adjusted depending on the type of initiator. In addition, when a radical photopolymerization initiator is used, heating is not particularly required, but heating may be performed.

In addition to the above, the curable resin composition forming the fluoropolymer contains various additives from the viewpoints of film hardness, refractive index, antifouling property, water resistance, chemical resistance, and slipperiness. You can also
For example, inorganic oxide fine particles such as (hollow) silica, silicone-based or fluorine-based antifouling agents, or slipping agents can be added. When adding these, it is preferable that it is the range of 0-30 mass% with respect to the total solid of a curable resin composition, It is more preferable that it is the range of 0-20 mass%, 0-10 It is particularly preferable that the mass range.

Next, inorganic oxide fine particles (hereinafter referred to as inorganic fine particles) that can be used in the present invention will be described.
By using the curable resin composition containing inorganic fine particles, in the case of forming the low refractive index layer in the antireflection film, coating amount of the inorganic fine ^{particles, 1mg / m 2 ~100mg / m} 2 are preferred, more preferably ^{5mg / m 2 ~80mg / m 2} , more preferably from ^{10mg / m 2 ~60mg / m 2} . If the amount of the inorganic fine particles is too small, the effect of improving the scratch resistance is reduced.If the amount is too large, for example, the surface of the low refractive index layer of the antireflection film has fine irregularities, and the appearance and integrated reflectance such as black tightening are reduced. Getting worse. Since the inorganic fine particles are contained in the low refractive index layer, it is desirable that the inorganic fine particles have a low refractive index.

Specifically, inorganic oxide particles or hollow inorganic oxide particles that have been subjected to a treatment for improving dispersibility in an organic solvent dispersion and that have a low refractive index are preferably used. For example, fine particles of silica or hollow silica can be mentioned. The average particle diameter of the silica fine particles is preferably 30% to 150% of the thickness of the low refractive index layer, more preferably 35% to 80%, and still more preferably 40% to 60%. That is, when the thickness of the low refractive index layer is 100 nm, the particle diameter of the silica fine particles is preferably 30 nm to 150 nm, more preferably 35 nm to 80 nm, and still more preferably 40 nm to 60 nm.
If the particle size of the silica fine particles is too small, the effect of improving the scratch resistance is reduced. If it is too large, fine irregularities are formed on the surface of the low refractive index layer, and the appearance such as black tightening and the integrated reflectance are deteriorated.
The silica fine particles may be either crystalline or amorphous, and may be monodispersed particles or aggregated particles as long as a predetermined particle size is satisfied. The shape is most preferably a spherical diameter, but there is no problem even if the shape is indefinite. Here, the average particle diameter of the inorganic fine particles is measured by a Coulter counter.

In order to lower the refractive index of the low refractive index layer, it is preferable to use hollow silica fine particles. The hollow silica fine particles have a refractive index of 1.17 to 1.40, more preferably 1.17 to 1.35, and still more preferably 1.17 to 1.30. The refractive index here represents the refractive index of the entire particle, and does not represent the refractive index of only the outer shell silica forming the hollow silica particles. At this time, when the radius of the cavity in the particle is a and the radius of the particle outer shell is b, the porosity x is calculated by the following mathematical formula (I).
(Formula I)
^{x = (4πa 3/3)} / (4πb 3/3) × 100
The porosity x is preferably 10 to 60%, more preferably 20 to 60%, and most preferably 30 to 60%. If the hollow silica particles are made to have a lower refractive index and a higher porosity, the thickness of the outer shell becomes thinner and the strength of the particles becomes weaker. From the viewpoint of scratch resistance, the low refractive index is less than 1.17. Rate particles do not hold.
The refractive index of these hollow silica particles was measured with an Abbe refractometer (manufactured by Atago Co., Ltd.).

  Moreover, the refractive index of this layer can be reduced by containing hollow particles in the low refractive index layer. The refractive index of the layer is preferably 1.20 or more and 1.47 or less, more preferably 1.25 or more and 1.41 or less, and most preferably 1.25 or more and 1.39 or less when hollow particles are used. It is. Methods for preparing hollow silica are described in, for example, JP-A Nos. 2001-233611 and 2002-79616.

Further, at least one kind of silica fine particles having an average particle size of less than 25% of the thickness of the low refractive index layer (hereinafter, referred to as “silica fine particles having a small particle size”) is used as silica fine particles having the above particle size (hereinafter referred to as “fine particle”). It is preferably used in combination with “large-sized silica particles”.
Since the fine silica particles having a small particle size can exist in the gaps between the fine silica particles having a large particle size, they can contribute as a retaining agent for the fine silica particles having a large particle size.
When the low refractive index layer is 100 nm, the average particle size of the silica fine particles having a small size is preferably from 1 nm to 20 nm, more preferably from 5 nm to 15 nm, and particularly preferably from 10 nm to 15 nm. Use of such silica fine particles is preferable in terms of raw material costs and a retaining agent effect.

In addition, from the viewpoint of storage stability, the curable resin composition may contain a polymerization inhibitor. Examples of the polymerization inhibitor that can be suitably used in the present invention include hydroquinone, hydroquinone monomethyl ether, mono-tert-butylhydroquinone, catechol, p-tert-butylcatechol, p-methoxyphenol, p-tert-butylcatechol, Phenols such as 2,6-di-tert-butyl-m-cresol, pyrogallol, β-naphthol, quinones such as benzoquinone, 2,5-diphenyl-p-benzoquinone, p-toluquinone, p-xyloquinone; nitrobenzene, Nitro compounds or nitroso compounds such as m-dinitrobenzene, 2-methyl-2-nitrosopropane, α-phenyl-tert-butylnitrone, 5,5-dimethyl-1-pyrroline-1-oxide; chloranil-amine, diphenylamino And radical polymerization inhibitors such as amines such as diphenylpicrylhydrazine, phenol-α-naphthylamine, pyridine and phenothiazine; sulfides such as dithiobenzoyl sulfide and dibenzyltetrasulfide. These may be used alone or in combination.
More preferred are compounds belonging to at least one of phenols, quinones, nitro compounds, nitroso compounds, amines and sulfides. Of these, phenols are preferably used from the viewpoints of refractive index and radical scavenging ability.

  These polymerization inhibitors are preferably added in an amount of 0.0001 to 10% by mass with respect to the total solid content in the curable resin composition, more preferably 0.0001 to 5% by mass, especially Preferably it is 0.001-2 mass%.

In addition, additives such as various silane coupling agents, surfactants, thickeners, and leveling agents may be appropriately added to the curable resin composition as necessary.
The fluorine-containing polymer of the present invention is cured after a curable resin composition containing the fluorine-containing monomer of the present invention is applied to a high refractive index layer, a medium refractive index layer, or other various base materials described later. Can be formed.

[Antireflection film]
The antireflection film of the present invention has a low refractive index layer formed by curing the curable resin composition containing the polymerizable fluorine-containing compound of the present invention.
The antireflection film of the present invention may have a single layer structure or a multilayer structure. That is, when the antireflection film has a single layer structure, it consists of only a low refractive index layer. When the antireflection film has a multilayer structure, it has at least two layers of a low refractive index layer and a high refractive index layer. The antireflection film preferably has a multilayer structure, and has a two-layer structure of the low refractive index layer and the high refractive index layer, or a medium refractive index layer in addition to the low refractive index layer and the high refractive index layer. A layer structure is preferred.

[Low refractive index layer]
The low refractive index layer is disposed on an upper layer of the high refractive index layer as will be described later. That is, the upper surface of the low refractive index layer becomes the surface of the antireflection film.
The refractive index of the low refractive index layer is 1.20 or more and 1.47 or less, more preferably 1.25 or more and 1.41 or less, and most preferably 1.25 or more and 1.39 or less. The refractive index can be obtained by measurement using an Abbe refractometer or estimation from the reflectance of light from the layer surface.
The thickness of the low refractive index layer is preferably 50 to 400 nm, and more preferably 50 to 200 nm. The haze of the low refractive index layer is preferably 3% or less, more preferably 2% or less, and most preferably 1% or less. The specific strength of the low refractive index layer is preferably H or higher, more preferably 2H or higher, and most preferably 3H or higher in a pencil hardness test under a 1 kg load.

[High refractive index layer and medium refractive index layer]
In the antireflection film of the present invention, the high refractive index layer and the medium refractive index layer used in combination with the low refractive index layer are layers having a higher refractive index than the low refractive index layer. The medium refractive index layer is a layer having a refractive index higher than that of the low refractive index layer and lower than that of the high refractive index layer.

The high refractive index layer and the medium refractive index layer are mainly composed of only an organic material or an organic material and an inorganic material, respectively.
Examples of the organic material used here include thermoplastic resin compositions (eg, polystyrene, polystyrene copolymer, polycarbonate, polymers having aromatic rings other than polystyrene, heterocyclic rings, and alicyclic groups, or halogen groups other than fluorine. A thermosetting resin composition (eg, a resin composition using a melamine resin, a phenol resin, or an epoxy resin as a curing agent); a urethane resin-forming composition (eg, an alicyclic or aromatic isocyanate) And a radically polymerizable composition (a composition comprising a modified resin composition or a modified prepolymer that enables radical curing by introducing a double bond into the polymer or monomer). ) And the like. The organic material used for the high refractive index layer or the medium refractive index layer is preferably a material having a high film forming property.

An organic material and an inorganic material can be used in combination for the high refractive index layer or the medium refractive index layer.
When an organic material and an inorganic material are used in combination, a high refractive index can generally be secured by the inorganic material, and therefore, an organic material having a lower refractive index than that used when the organic material is used alone can be used. Examples of such organic materials include copolymers of acrylic monomers such as pentaerythritol hexaacrylate and vinyl monomers, polyesters, alkyd resins, fibrous polymers, urethane resins, and various types of resins that cure these resins. And a composition containing a curing agent or a compound having a curable functional group. These organic materials are transparent and can disperse inorganic materials stably. Specific examples of the compound having a curable functional group include trimethylolpropane tri (meth) acrylate, ditrimethylolpropane tetra (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol. Polyurethane poly (meth) acrylates such as penta (meth) acrylate and dipentaerythritol hexa (meth) acrylate, urethane obtained by reaction of polyisocyanate and hydroxyl-containing (meth) acrylate such as hydroxyethyl (meth) acrylate ( And (meth) acrylate.

Furthermore, an organically substituted silicon compound can be used as the organic material. Examples of the silicon-based compound include a compound represented by the following formula (5) or a hydrolysis product thereof.
Formula (5) R ^a _m (R ^b ) _n SiZ _4-mn
Here, R ^a represents an alkyl group, an alkenyl group, or an aryl group, R ^b represents an alkyl group, an alkenyl group, or an aryl group substituted with halogen, epoxy, amino, mercapto, methacryloyl, or cyano, and Z Represents a hydrolyzable group selected from an alkoxy group, an alkoxyalkoxy group, a halogen atom and an acyloxy group, and m and n are 0, 1 or 2 respectively under the condition that m + n is 1 or 2.

  Examples of the inorganic material include inorganic fine particles. Preferable inorganic compounds constituting the inorganic fine particles include oxides of metal elements such as aluminum, titanium, zirconium and antimony. The inorganic fine particles are commercially available as a powder or a colloidal dispersion in which the powder is dispersed in a solvent such as water. When using these, it is preferable to mix and disperse in the said organic material or organosilicon compound.

In addition, as the inorganic material, an inorganic material that is film-forming and can be dispersed in a solvent, or is itself liquid can be used. Examples of such inorganic materials include alkoxides of various elements, salts of organic acids, coordination compounds (eg, chelate compounds) bonded to coordination compounds, and inorganic polymers).
More specifically, titanium tetraethoxide, titanium tetra-i-propoxide, titanium tetra-n-propoxide, titanium tetra-n-butoxide, titanium tetra-sec-butoxide, titanium tetra-tert-butoxide, aluminum tri Ethoxide, aluminum tri-i-propoxide, aluminum tributoxide, antimony triethoxide, antimony riboxide, zirconium tetraethoxide, zirconium tetra-i-propoxide, zirconium tetra-n-propoxide, zirconium tetra-n- Metal alcoholate compounds such as butoxide, zirconium tetra-sec-butoxide and zirconium tetra-tert-butoxide; diisopropoxytitanium bis (acetylacetonate), dibutoxy Titanium bis (acetylacetonate), diethoxytitanium bis (acetylacetonate), bis (acetylacetonezirconium), aluminum acetylacetonate, aluminum di-n-butoxide monoethylacetoacetate, aluminum di-i-propoxide monomethylacetate Chelate compounds such as acetate and tri-n-butoxide zirconium monoethyl acetoacetate; and inorganic polymers mainly composed of carbon zirconyl ammonium or zirconium.

In addition to the compounds listed above, compounds having a relatively low refractive index can be used in combination for the high refractive index layer and the medium refractive index layer. Examples of such a compound include various alkyl silicates or hydrolysates thereof, particulate silica, particularly silica gel dispersed in colloidal form.
In addition, a dispersion solvent or a solvent can be used for the high refractive index layer and the medium refractive index layer. Examples of the dispersion solvent or solvent include cyclohexanone, methyl ethyl ketone, methyl isobutyl ketone toluene, toluene, ethyl acetate, DMF, 2-propanol, and n-butanol.
Furthermore, additives that are usually added to conventional antireflection films can be appropriately used in the high refractive index layer and the medium refractive index layer.

As an embodiment of the high refractive index layer and the medium refractive index layer, a dispersion of the above inorganic material, a monomer such as dipentaerythritol hexaacrylate, a polymerization initiator such as a photopolymerization initiator and a thermal polymerization initiator, What was formed using the composition for layer formation formed by melt | dissolving the sensitizer and catalyst used as needed in a solvent (the same thing as the said dispersion | distribution solvent can be illustrated) is mentioned.
For such a configuration, a configuration related to a high refractive index layer and a medium refractive index layer in a conventional antireflection film is appropriately applied.

  The refractive index of the high refractive index layer is preferably in the range of 1.57 to 2.40. The thickness of the high refractive index layer is preferably 5 nm to 10 μm, more preferably 10 nm to 1 μm, and most preferably 30 nm to 0.5 μm. The haze of the high refractive index layer is preferably 5% or less, more preferably 3% or less, and most preferably 1% or less. The strength of the high refractive index layer is preferably 1H or more, more preferably 2H or more, and most preferably 3H or more, with a pencil hardness of 1 kg.

The refractive index of the middle refractive index layer is adjusted to be a value between the refractive index of the low refractive index layer and the refractive index of the high refractive index layer. The refractive index of the middle refractive index layer is preferably in the range of 1.50 to 1.85. It is particularly preferable that inorganic fine particles and a polymer are used for the high refractive index layer, and the middle refractive index layer is formed by adjusting the refractive index to be lower than that of the high refractive index layer. The haze of the medium refractive index layer is preferably 3% or less.
The thickness of the medium refractive index layer is preferably 5 nm to 10 μm, more preferably 10 nm to 1 μm, and most preferably 30 nm to 0.5 μm. The strength of the medium refractive index layer is preferably 1H or more, more preferably 2H or more, and most preferably 3H or more, with a pencil hardness of 1 kg.

[Method of forming antireflection film]
The antireflection film of the present invention forms the high refractive index layer by applying the composition for forming the high refractive index layer or the medium refractive index layer to various substrates and curing it by light irradiation or the like. After that, the curable resin composition for the low refractive index layer is applied on the high refractive index layer or the medium refractive index layer, and further cured by light irradiation or heating. .
The antireflection film of the present invention is preferably used for the following antireflection film and display device, and can also be used for a case cover, an optical lens, a spectacle lens, a window shield, a light cover, and a helmet shield.

[Antireflection film]
The antireflection film of the present invention is obtained by providing the antireflection film of the present invention on a transparent support.
A basic configuration of an antireflection film suitable as one embodiment of the antireflection film 1 of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic view showing a cross section of one embodiment of the antireflection film of the present invention.
The antireflection film shown in FIG. 1 has an antireflection film 6 in which a high refractive index layer 8 and a low refractive index layer 5 are formed in this order on a transparent support 2.
In such a configuration, as described in JP-A-59-50401, when the high refractive index layer 8 satisfies the following formula (II) and the low refractive index layer 5 satisfies the following formula (III), It is preferable because an antireflection film having excellent antireflection performance can be obtained.

Formula (II): (mλ / 4) × 0.7 <n ₁ d ₁ <(mλ / 4) × 1.3

In the formula, m is a positive integer (generally 1, 2 or 3), n ₁ is the refractive index of the high refractive index layer, and d ₁ is the layer thickness (nm) of the high refractive index layer.

Formula (III): (nλ / 4) × 0.7 <n ₂ d ₂ <(nλ / 4) × 1.3

Where n is a positive odd number (generally 1), n ₂ is the refractive index of the low refractive index layer, and d ₂ is the layer thickness (nm) of the low refractive index layer.
The refractive index n ₁ of the high refractive index layer is generally at least 0.05 higher than the transparent support, and the refractive index n ₂ of the low refractive index layer is generally at least 0.1 lower than the refractive index of the high refractive index layer and At least 0.05 lower than the transparent support. Further, the refractive index n ₁ of the high refractive index layer is generally in the range of 1.57 to 2.40.

  Further, as described above, the antireflection film of the present invention may have a structure having an antireflection film composed of two layers of a low refractive index layer and a high refractive index layer, and further, an intermediate refractive index layer, a hard coat layer, etc. It is preferable to form a layer in advance and to have three or more antireflection films on which a low refractive index layer and a high refractive index layer are formed according to the method described above. More preferably, it is a form in which three or more layers of middle, high and low refractive index layers are laminated. An embodiment of such an antireflection film is shown in FIG.

That is, the antireflection film 1 shown in FIG. 2 has a hard coat layer 3 on a transparent support 2, and a medium refractive index layer 7, a high refractive index layer 8, and a low refractive index layer 5 are arranged in this order. The antireflection film 6 is formed.
In such a configuration, as described in JP-A-59-50401, the medium refractive index layer 7 is represented by the following formula (IV), the high refractive index layer 8 is represented by the following formula (V), and the low refractive index layer. 5 preferably satisfies the following numerical formula (VI).

Formula (IV): (hλ / 4) × 0.7 <n ₃ d ₃ <(hλ / 4) × 1.3

Where h is a positive integer (generally 1, 2 or 3), n ₃ is the refractive index of the medium refractive index layer, and d ₃ is the layer thickness (nm) of the medium refractive index layer.

Formula (V): (jλ / 4) × 0.7 <n ₄ d ₄ <(jλ / 4) × 1.3

Where j is a positive integer (generally 1, 2 or 3), n ₄ is the refractive index of the high refractive index layer, and d ₄ is the layer thickness (nm) of the high refractive index layer.

Formula (VI): (kλ / 4) × 0.7 <n ₅ d ₅ <(kλ / 4) × 1.3

Where k is a positive odd number (generally 1), n ₅ is the refractive index of the low refractive index layer, and d ₅ is the layer thickness (nm) of the low refractive index layer.

The refractive index n ₃ of the middle refractive index layer is generally in the range of 1.50 to 1.85, and the refractive index n ₄ of the high refractive index layer is generally in the range of 1.57 to 2.40.
Moreover, (lambda) in numerical formula (II)-(VI) is a wavelength of visible light, and is a value of the range of 380-680 nm. The high refractive index, medium refractive index, and low refractive index described here refer to the relative refractive index between layers. For example, the medium refractive index layer is produced by a method such as changing the content of the high refractive index inorganic fine particles added to the high refractive index layer.

The antireflection film can be provided with a hard coat layer as described above, and may further be provided with a moisture proof layer, an antistatic layer, an undercoat layer and a protective layer. The hard coat layer is provided for imparting scratch resistance to the transparent support. The hard coat layer also has a function of strengthening the adhesion between the transparent support and the layer thereon. The hard coat layer can be formed using an acrylic polymer, a urethane polymer, an epoxy polymer, a silicon polymer, or a silica compound. A pigment may be added to the hard coat layer.
The acrylic polymer is preferably synthesized by a polymerization reaction of a polyfunctional acrylate monomer (eg, polyol acrylate, polyester acrylate, urethane acrylate, epoxy acrylate). Examples of the urethane polymer include melamine polyurethane. As the silicon-based polymer, a cohydrolyzate of a silane compound (eg, tetraalkoxysilane, alkyltrialkoxysilane) and a silane coupling agent having a reactive group (eg, epoxy, methacryl) is preferably used. Two or more kinds of polymers may be used in combination. As the silica compound, colloidal silica is preferably used. The strength of the hard coat layer is a pencil hardness with a 1 kg load, preferably H or higher, more preferably 2H or higher, and most preferably 3H or higher. On the transparent support, in addition to the hard coat layer, an adhesive layer, a shield layer, a sliding layer and an antistatic layer may be provided. The shield layer is provided to shield electromagnetic waves and infrared rays.

[Transparent support]
As the transparent support that can be preferably used in the present invention, a plastic film is more preferable than a glass plate as the transparent support. Examples of plastic film materials include cellulose acylates (eg, triacetyl cellulose, diacetyl cellulose, propionyl cellulose, butyryl cellulose, acetyl propionyl cellulose, nitrocellulose), polyamides, polycarbonates, polyesters (eg, polyethylene terephthalate, polyethylene naphthalate). Phthalate, poly-1,4-cyclohexanedimethylene terephthalate, polyethylene-1,2-diphenoxyethane-4,4′-dicarboxylate, polybutylene terephthalate), polystyrene (eg, syndiotactic polystyrene), polyolefin (eg, , Polypropylene, polyethylene, polymethylpentene), polysulfone, polyethersulfone, polyarylate, polyetherimide, polymethyl Methacrylate and polyether ketone are included. Cellulose acylate, polycarbonate, polyethylene terephthalate and polyethylene naphthalate are preferred, and triacetyl cellulose is more preferred.

  The thickness of the cellulose acylate film varies depending on the purpose of use, but is usually in the range of 5 to 500 μm, more preferably in the range of 20 to 250 μm, and most preferably in the range of 30 to 180 μm. In addition, as an optical use, the range of 30-110 micrometers is especially preferable. The production of a cellulose acylate film using a non-chlorine solvent is described in detail in JIII Journal of Technical Disclosure No. 2001-1745, and the cellulose acylate film described therein is also preferably used in the present invention. Can do.

The light transmittance of the transparent support is preferably 80% or more, and more preferably 86% or more. The haze of the transparent support is preferably 2.0% or less, and more preferably 1.0% or less. The refractive index of the transparent support is preferably 1.4 to 1.7. An infrared absorber or an ultraviolet absorber may be added to the transparent support. The addition amount of the infrared absorber is preferably 0.01 to 20% by mass of the transparent support, and more preferably 0.05 to 10% by mass. As a slip agent, particles of an inert inorganic compound may be added to the transparent support. Examples of the inorganic _{compound, SiO 2, TiO 2, BaSO} 4, CaCO 3, talc and kaolin. A surface treatment may be performed on the transparent support.
Examples of the surface treatment include chemical treatment, mechanical treatment, corona discharge treatment, flame treatment, ultraviolet irradiation treatment, high frequency treatment, glow discharge treatment, active plasma treatment, laser treatment, mixed acid treatment and ozone oxidation treatment. Glow discharge treatment, ultraviolet irradiation treatment, corona discharge treatment and flame treatment are preferred, and glow discharge treatment and ultraviolet treatment are more preferred.

[Method for forming antireflection film]
Each layer of the antireflection film is formed by a dip coating method, an air knife coating method, a curtain coating method, a roller coating method, a wire bar coating method, a gravure coating method or an extrusion coating method (described in US Pat. No. 2,681,294). ) Can be formed by coating directly on the transparent support or through another layer. Two or more layers may be applied simultaneously. For the method of simultaneous application, U.S. Pat. Nos. 2,761,791, 2,941,898, 3,508,947, 3,526,528 and Yuji Harasaki Author, “Coating Engineering”, page 253, Asakura Shoten (1973). The antireflection film of the present application is preferably dried after applying the coating composition of each layer and cured by ionizing radiation or heat. It is preferable to use ionizing radiation, and in the case of curing using ultraviolet rays, ultraviolet rays emitted from light rays such as an ultrahigh pressure mercury lamp, a high pressure mercury lamp, a low pressure mercury lamp, a carbon arc, a xenon arc, and a metal halide lamp can be used.

  The lower the reflectance of the antireflection film, the better. The average reflectance of the antireflection film is preferably 2% or less, more preferably 1% or less, and most preferably 0.7% or less in the wavelength region of 450 to 650 nm. The haze of the antireflection film (when it has no anti-glare function described below) is preferably 3% or less, more preferably 1% or less, and most preferably 0.5% or less. The strength of the antireflection film is preferably H or higher, more preferably 2H or higher, with a pencil hardness of 1 kg.

  The antireflection film may have an antiglare function that scatters external light. The antiglare function is obtained by forming irregularities on the surface of the antireflection film. In a low refractive index layer using fine particles, irregularities can be formed on the surface of the antireflection film by the fine particles. When the antiglare function obtained by the fine particles is insufficient, a small amount (0.1 nm) of relatively large particles (particle size: 50 nm to 2 μm) is added to the low refractive index layer, high refractive index layer, medium refractive index layer or hard coat layer. ˜50 mass%) may be added. The anti-reflection film expands the viewing angle (especially the downward viewing angle) of the liquid crystal display device, and diffuses light for the purpose of suppressing contrast degradation, gradation or black-and-white reversal, or hue change even when the viewing angle in the viewing direction changes. It may have a function. The light diffusing function can be realized by the effect of internal scattering of translucent fine particles contained in the light diffusing film. When the antireflection film has an antiglare function and / or a light diffusion function, the haze of the antireflection film is preferably 3 to 60%, and more preferably 4 to 40%.

[Image display device]
The image display device of the present invention includes the antireflection film of the present invention.
Examples of the image display device include a liquid crystal display device (LCD), a plasma display panel (PDP), an electroluminescence display (ELD), and a cathode ray tube display device (CRT). In the image display device of the present invention, it is preferable that the transparent support side of the antireflection film is bonded to the image display surface of the image display device.

[Composition for water-repellent polyurethane]
The composition for water-repellent polyurethane of the present invention comprises at least one of (A) a polyol compound, (B) a polyisocyanate compound, and (C) a fluorine-containing alcohol represented by the following general formula (II) or (III). A water-repellent polyurethane composition.

［式中、Ｒｆ_１、Ｒｆ_２、ｍおよびｎは、それぞれ上記一般式（Ｉ）で表される重合性フッ素化合物におけるＲｆ_１、Ｒｆ_２、ｍ、ｎと同義である。］
一般式（II）および（III）で表される含フッ素アルコールの化合物例を以下に示すが、本発明はこれらに限定されるものではない。

_Wherein, Rf 1, _Rf 2, m and n are _Rf 1, _Rf 2, m in each polymerizable fluorine compound represented by the general formula (I), and n synonymous. ]
Although the example of a compound of the fluorine-containing alcohol represented by general formula (II) and (III) is shown below, this invention is not limited to these.

  Of the compounds represented by the general formula (I), the alcohol end group of the fluorine-containing alcohol represented by the general formula (II) or (III) is reacted with an acrylic acid halide (for example, acrylic acid chloride). A compound having a carbon-carbon double bond at the terminal corresponding to the compound represented by Ia) can be obtained (see scheme 2 in Example 1 described later). In this case, unreacted alcohol end groups can be left in the product compound by appropriately controlling the molar ratio of the acrylic acid halide to the alcohol end groups. The compound of the general formula (II) or (III) corresponds to a precursor of the compound represented by the general formula (I).

The most preferred embodiments of the fluorinated alcohol represented by the general formula (II) or (III) are those represented by the above general formulas (II-1) and (III-1), respectively.
Regarding the polyol compound of component (A), the polyisocyanate compound of component (B) and the mixing ratio of these compounds to the component (C) represented by formula (II) and / or (III), the curing method, etc. Although not particularly limited, preferred embodiments include those described in JP-A-7-316500.
The fluorine-containing alcohol represented by the general formula (II) can be synthesized by the route shown in the above (Chemical Formula 14). Moreover, the fluorine-containing alcohol represented by general formula (III) is compoundable by the following routes, for example.

  EXAMPLES Hereinafter, although this invention is demonstrated in detail based on an Example, this invention is not limited to these.

<Example 1: Synthesis of fluorine-containing alcohol and polymerizable fluorine-containing compound>
(Synthesis of Compound Example M5)
According to the following scheme, the fluorine-containing alcohol II-1 and the polymerizable fluorine-containing compound M5 of the present invention were synthesized.

(Synthesis of Compound 3)
Trimethylolethane (30 g) was added to a solution of t-butoxypotassium (253 g) in t-butanol (750 ml), and 2-chloroacetic acid (122 g) was further added dropwise. The reaction mixture was stirred at reflux temperature for 6 hours, cooled to room temperature, 36% aqueous hydrochloric acid (200 ml) and ethanol (500 ml) were added, and the insoluble material was filtered off. The filtrate was concentrated under reduced pressure, ethanol (1 L) and concentrated sulfuric acid (100 ml) were added, and the mixture was stirred at reflux temperature for 3 hr. After distilling off ethanol (about 600 ml) under reduced pressure, the reaction solution was slowly poured into ethyl acetate (1.5 L) / sodium hydrogen carbonate (300 g) / water (1.5 L). The organic layer was washed with brine and dried over magnesium sulfate. After concentration under reduced pressure, purification by column chromatography (developing solvent: ethyl acetate / hexane = 1/4) gave Compound 3 (45 g, 43%). The NMR measurement results of Compound 3 were as follows.
[ ¹ H NMR (CDCl ₃ ) δ 0.99 (s, 3H), 1.28 (t, J = 7.0 Hz, 9H), 1.36 (d, J = 6.9 Hz, 9H), 3. 25 to 3.53 (m, 6H), 3.90 to 3.97 (m, 3H), 4.13 to 4.24 (m, 6H)]

(Synthesis of Compound 4)
Lithium aluminum hydride (7.1 g) was dispersed in tetrahydrofuran (270 ml), and a solution of compound 3 (21.7 g) in tetrahydrofuran (70 ml) was added dropwise at a temperature of 25 ° C. or lower. After the reaction solution was stirred at room temperature for 3 hours, water (14 ml) and 10% sodium hydroxide solution (11.2 ml) were slowly added dropwise, and the mixture was further stirred for 1 hour. Insoluble material was filtered off, and brine (60 ml) was added to the filtrate. After liquid separation, the organic layer was concentrated under reduced pressure to obtain Compound 4 (12 g, 80%). The NMR measurement results of Compound 4 were as follows.
[ ¹ H NMR (CDCl ₃ ) δ 0.91 (s, 3H), 1.08 (d, J = 6.0 Hz, 9H), 2.40 (brs, 3H), 3.29 to 3.63 ( m, 15H)]

(Synthesis of Compound 5)
7H-dodecafluoropentanoyl chloride (30.6 ml) was added dropwise to a solution of compound 4 (12 g) and pyridine (19.8 ml) in tetrahydrofuran (120 ml), and the mixture was stirred at room temperature for 5 hours. The reaction mixture was poured into ethyl acetate (200 ml) and brine (200 ml) and separated. The organic layer was dried over magnesium sulfate and concentrated under reduced pressure. The residue was purified by column chromatography (developing solvent: ethyl acetate / hexane = 1/4) to obtain Compound 5 (44 g, 84%). The NMR measurement results of Compound 5 were as follows.
[ ¹ H NMR (CDCl ₃ ) δ 0.86 (s, 3H), 1.15 (d, J = 6.3 Hz, 9H), 3.17 to 3.24 (m, 3H), 3.20 to 3.34 (m, 3H), 3.61 to 3.67 (m, 3H), 4.23 to 4.35 (m, 6H), 6.04 (tt, J = 51.6, 5.1 Hz) , 3H)]
[ ¹⁹ F NMR (CDCl ₃ ) δ −118.46 (s, 6F), −121.97 (6F), −122.69, −123.52 (6F), −129.45 (6F), −137 .14 (d, J = 51.6 Hz, 6F)]

(Synthesis of Compound 7)
In a 500 ml Teflon (registered trademark) container equipped with a raw material supply port, a fluorine supply port, a helium gas supply port and an exhaust port connected to a fluorine trap via a reflux device cooled with dry ice, sodium fluoride ( 29.5 g) and FC-72 (350 ml) were added, and helium gas was blown at an internal temperature of 20 ° C. at a flow rate of 100 ml / min for 30 minutes. Subsequently, 20% F ₂ / N ₂ gas was blown at 100 ml / min for 30 minutes, the fluorine flow rate was adjusted to 200 ml / min, and a mixed solution of compound 5 (15 g) and hexafluorobenzene (4.35 ml) was 2.6 ml / min. Added in h. The fluorine flow rate was lowered to 100 ml / min, hexafluorobenzene (1.3 ml) was added at 0.6 ml / h, and 20% F ₂ / N ₂ gas was further allowed to flow at 100 ml / min for 15 minutes. After replacing the reactor with helium gas, methanol (100 ml) was added and stirred for 1 hour. After filtering the reaction solution, FC-72 was distilled off by heating at normal pressure, and methanol was further distilled off under reduced pressure of 100 mmHg. The concentrated residue was washed with AK-225 / aqueous sodium bicarbonate solution, and the AK-225 layer was dried over magnesium sulfate. After AK-225 was distilled off at 300 mmHg, the residue was purified by distillation at 2 mmHg to obtain Compound 7 (3.5 g, 40%). The NMR measurement results and melting points of Compound 7 were as follows.
[ ¹ H NMR (CDCl ₃ ) δ 3.98 (s, 9H)]
[ ¹⁹ F NMR (CDCl ₃ ) δ −63.04 to −63.15 (m, 3F), −63.78 (d, J = 154 Hz, 3F), −68.46 (d, J = 154 Hz, 3F ), −82.10 (s, 9F), −130.98 to −131.31 (m, 3F)]
[B. p. = 115 ° C (2mmHg)]

(Synthesis of Compound II-1)
Lithium aluminum hydride (1.75 g) was dispersed in diethyl ether (10 ml), and a solution of compound 7 (3.5 g) in diethyl ether (30 ml) was added dropwise at a temperature of 10 ° C. or lower. The reaction solution was stirred at room temperature for 6 hours, and ethyl acetate (100 ml) was slowly added dropwise. This solution was slowly poured into dilute hydrochloric acid / ice / ethyl acetate, and insolubles were filtered off. The organic layer was washed with water and brine, dried over magnesium sulfate and concentrated under reduced pressure. The residue was purified by column chromatography (developing solvent: ethyl acetate / hexane = 1/1) to obtain Compound II-1 (3.1 g, 99%) as a viscous oil. The NMR measurement result of Compound II-1 was as follows.
[ ¹ H NMR (CDCl ₃ ) δ 4.12 to 4.17 (m, 6H)]
[ ¹⁹ F NMR (CDCl ₃ ) δ −63.78 (d, J = 147 Hz, 3F), −64.18 to −64.41 (m, 3F), −68.46 (d, J = 147 Hz, 3F ), −82.95 (s, 9F), −136.20 to −136.53 (m, 3F)]

(Synthesis of Compound M5)
Acrylic acid chloride (1.1 ml) was added dropwise to a solution of Compound II-1 (2.8 g) and potassium carbonate (3.4 g) in N-methylpyrrolidone (50 ml) at a temperature of 10 ° C. or lower. The reaction mixture was stirred at room temperature for 5 hours, potassium carbonate (3.4 g) and acrylic acid chloride (1.1 ml) were added, and the mixture was further stirred for 20 hours. The reaction mixture was poured into ethyl acetate (200 ml) / dilute aqueous hydrochloric acid (200 ml) and separated. The organic layer was washed with an aqueous sodium hydrogen carbonate solution and brine, and then purified by column chromatography (developing solvent: ethyl acetate / hexane = 1/4) to obtain Compound M5 (2.2 g, 63%). The results of NMR measurement of Compound M5 were as follows.
[ ¹ H NMR (CDCl ₃ ) δ 4.61-4.80 (m, 6H), 5.97 (dd, J = 10.5, 1.2 Hz, 3H), 6.14 (dd, J = 17 .1, 10.5 Hz, 3H), (dd, J = 17.1, 1.2 Hz, 3H)]
[ ¹⁹ F NMR (CDCl ₃ ) δ −63.21 (brs, 3F), −63.52 (d, J = 147 Hz, 3F), −65.88 (d, J = 147 Hz, 3F), −82. 57 (s, 9F), -133.39 to -133.48 (m, 3F)] M5 was obtained as a viscous oil.
Compounds M1-4 and M6-20 were synthesized by the same method as above.

<Example 2: Synthesis of fluorinated alcohol>
(Synthesis of Compound III-1)
The fluorine-containing alcohol III-1 of the present invention was synthesized according to the following scheme.

(Synthesis of Compound 9)
To a 1000 ml Teflon (registered trademark) container equipped with a raw material supply port, a fluorine supply port, a helium gas supply port and an exhaust port connected to a fluorine trap through a reflux device cooled with dry ice, sodium fluoride ( 40.7 g) and FC-72 (700 ml) were added, and helium gas was blown at an internal temperature of 0 ° C. at a flow rate of 100 ml / min for 30 minutes. Subsequently, 20% F ₂ / N ₂ gas was blown in at 100 ml / min for 60 minutes, the fluorine flow rate was adjusted to 250 ml / min, and a mixed solution of compound 8 (15 g) and AK-225 (33 g) at 6.0 ml / h. Added. The fluorine flow rate was lowered to 200 ml / min, a solution of hexafluorobenzene (3 ml) in FC-72 (6 ml) was added at 2.8 ml / h, and 20% F ₂ / N ₂ gas was further flowed at 200 ml / min for 15 minutes. did. The reactor was replaced with helium gas and then filtered. Sodium fluoride (10 g) was added to the filtrate, methanol (300 ml) was added, and the mixture was stirred for 2 hours. After filtering the reaction solution, FC-72 was distilled off by heating at normal pressure, and methanol was further distilled off under reduced pressure of 100 mmHg. The concentrated residue was washed with diethyl ether / aqueous sodium hydrogen carbonate solution, and the organic layer was dried over magnesium sulfate. The solvent was concentrated under reduced pressure to give compound 9 (6.59 g, 81%) as a colorless oil.
[ ¹ H NMR (CDCl ₃ ) δ 3.98 (s, 12H)]
[ ¹⁹ F NMR (CDCl ₃ ) δ-66.2 (s, 8F), -86.8 (s, 8F), -122.8 (s, 8F)]

Synthesis of (Compound III-1) Lithium aluminum hydride (1.75 g) was dispersed in diethyl ether (10 ml), and a solution of compound 9 (3.2 g) in diethyl ether (30 ml) was added dropwise at a temperature of 10 ° C. or lower. The reaction solution was stirred at room temperature for 6 hours, and ethyl acetate (100 ml) was slowly added dropwise. This solution was slowly poured into dilute hydrochloric acid / ice / ethyl acetate, and insolubles were filtered off. The organic layer was washed with water and brine, dried over magnesium sulfate and concentrated under reduced pressure. The residue was purified by column chromatography (developing solvent: ethyl acetate / hexane = 1/1) to give Compound III-1 (2.7 g, 96%) as a viscous oil. The NMR measurement result of Compound III-1 was as follows.
[ ¹ H NMR (CDCl ₃ ) δ 3.93 (s, 8H)]
[ ¹⁹ F NMR (CDCl ₃ ) δ −66.73 (s, J = 14 Hz, 8F), −86.89 (s, 8F), −127.23 (t, J = 14 Hz, 8F)]

(Synthesis of comparative polymerizable compounds)
The tetrafunctional fluorine-containing monomer R2 described in JP-A-2006-28280 was obtained by acryloylating the fluorine-containing alcohol III-1. Further, trifunctional and hexafunctional fluorine-containing monomers R1 and R3 were obtained by the same method. In addition, fluorine-containing polyfunctional monomers R4 and R5 were synthesized by the method described in the Examples section of the above publication.

  Table 1 shows the fluorine content and the molecular weight between crosslinks of the compounds of the present invention and comparative compounds R1 to R5 (the largest one when there are a plurality of crosslinks).

<Example 3. Preparation and evaluation of antireflection film>
(Preparation of curable resin composition)
Each component shown in Table 2 is mixed (in parentheses indicate the ratio of solid components), dissolved in methyl ethyl ketone to prepare a 30% by mass solution, and then filtered through a polytetrafluoroethylene filter having a pore size of 0.25 μm. A curable resin composition was prepared.
In the table, Irg907 represents a photopolymerization initiator Irgacure 907 (trade name) manufactured by Ciba Specialty Chemicals, and WPAG-145 represents a photoacid generator (Bis (cyclohexylsulfonyl) diazomethane) manufactured by Wako Pure Chemical Industries, Ltd. Represents.

(Evaluation of antireflection film)
The curable resin composition prepared as described above was applied onto a glass substrate using a bar coater. After drying at 90 ° C., ultraviolet rays were irradiated in a nitrogen atmosphere, and further heated at 120 ° C. for 10 minutes, and then cooled to room temperature. Thus, the universal hardness, refractive index, and antifouling property of the produced antireflection film (samples P-1 to P-10) were evaluated. The results are shown in Table 2.

(Evaluation methods)
Universal hardness evaluation:
It measured using the microhardness meter (Fischer scope H100VP-HUC) by Corporation | KK Fisher Instruments. At this time, a square pyramid indenter (tip-to-face angle; 136 ^o ) made of diamond was used, and the indentation depth under an appropriate test load was measured in a range where the indentation depth did not exceed 1 μm. Universal hardness value (HU) is expressed as the test load divided by the surface area calculated from the geometry of the indentation produced by the test load.
Refractive index:
Refractive index: Measured using an Abbe refractometer (manufactured by Atago Co., Ltd.).
Antifouling rating:
Write a line with red, blue, and black oil-based magic on the surface of the prepared coating film. After leaving it to stand at room temperature for 24 hours, the level of antifouling property against the magic when wiped with a dry cloth or paper was confirmed. . The determination was in accordance with the following criteria.
Not at all ： ○
A slight color remains: △
Coloring is remarkable: ×

<Example 4. Preparation and evaluation of antireflection film>
(Preparation of antireflection film)
Using the prepared curable resin composition, an antireflection film was coated on a transparent support as described below to produce an antireflection film.

(Preparation of titanium dioxide dispersion)
Titanium dioxide fine particles having a core / shell structure (TTO-55B, shell material: 9% by mass of the whole alumina particles, manufactured by Ishihara Sangyo Co., Ltd., trade name) 30 g, poly (1H, 1H, 5H-octafluoropentyl acrylate) 4.5 g, 0.3 g of a commercially available cationic monomer (DMAEA, trade name, manufactured by Kojin Co., Ltd.) and 65.2 g of cyclohexanone were dispersed by a sand grinder mill to obtain a titanium dioxide dispersion having a weight average diameter of 53 nm. Prepared.

(Preparation of coating solution for medium refractive index layer)
18.08 g of a mixture of dipentaerythritol pentaacrylate and dipentaerythritol hexaacrylate (DPHA (trade name), Nippon Kayaku Co., Ltd.) was added to 49.60 g of the titanium dioxide dispersion, and a photopolymerization initiator ( Irgacure 907, trade name, Ciba Specialty Chemicals Co., Ltd. 0.920 g, photosensitizer (Kayacure DETX, trade name, Nippon Kayaku Co., Ltd.) 0.307 g, methyl ethyl ketone 230 0.0 g and 500 g of cyclohexanone were added and stirred. The solution was filtered through a polypropylene filter having a pore diameter of 0.4 μm to prepare a coating solution for forming a middle refractive index layer.

(Preparation of coating solution for high refractive index layer)
To 110.0 g of the titanium dioxide dispersion, 6.29 g of a mixture of dipentaerythritol pentaacrylate and dipentaerythritol hexaacrylate (DPHA (trade name), manufactured by Nippon Kayaku Co., Ltd.), a photopolymerization initiator ( Irgacure 907, trade name, Ciba Specialty Chemicals Co., Ltd. 0.520 g, photosensitizer (Kayacure DETX, trade name, Nippon Kayaku Co., Ltd.) 0.173 g, methyl ethyl ketone 230 0.00.0 g and 460.0 g of cyclohexanone were added and stirred. A coating solution for forming a high refractive index layer was prepared by filtering through a polypropylene filter having a pore diameter of 0.4 μm.

(Preparation of coating solution for hard coat layer)
125 g of a mixture of dipentaerythritol pentaacrylate and dipentaerythritol hexaacrylate (DPHA (trade name), Nippon Kayaku Co., Ltd.) and urethane acrylate oligomer (UV-6300B (trade name), Nippon Synthetic Chemical Industry Co., Ltd. 125 g) was dissolved in 439 g of industrially modified ethanol. To the obtained solution, 7.5 g of a photopolymerization initiator (Irgacure 907 (trade name), manufactured by Ciba Specialty Chemicals Co., Ltd.) and a photosensitizer (Kayacure-DETX (trade name), Nippon Kayaku ( A solution prepared by dissolving 5.0 g in 49 g of methyl ethyl ketone was added. The mixture was stirred and then filtered through a 1 micron mesh filter to prepare a coating solution for forming a hard coat layer.

(Coating each layer)
The antireflection film shown in FIG. 2 was produced as follows.
On the triacetyl cellulose film (TD80U (trade name), manufactured by FUJIFILM Corporation) having a thickness of 80 μm as the transparent support 2, the hard coat layer coating solution was applied using a bar coater. After drying at 90 ° C., the coating layer was cured by irradiating with ultraviolet rays to form a hard coat layer 3 having a thickness of 6 μm.
On the hard coat layer 3, the medium refractive index layer coating solution was applied using a bar coater. After drying at 60 ° C., the coating layer was cured by irradiating with ultraviolet rays to form a medium refractive index layer 7 (refractive index 1.70, film thickness 70 nm, TTB-55B, 21% by volume). On the middle refractive index layer 7, the coating liquid for high refractive index layer was applied using a bar coater. After drying at 60 ° C., the coating layer was cured by irradiating with ultraviolet rays to form a high refractive index layer 8 (refractive index 1.95, film thickness 75 nm).
On the high refractive index layer 8, the curable resin composition prepared as described above was applied using a bar coater, dried at 90 ° C, and then irradiated with ultraviolet rays in a nitrogen atmosphere, and further 120 ° C. For 10 minutes, and then allowed to cool to room temperature to form a low refractive index layer 5 (film thickness 100 nm) to produce antireflection films (S-1 to S-8).

(Evaluation of antireflection film)
The obtained antireflection film was tested for average reflectance, pencil hardness, and scratch resistance. The results are shown in Table 3.

Average reflectance rating:
Using a spectrophotometer (manufactured by JASCO Corporation), the spectral reflectance at an incident angle of 5 ° was measured in a wavelength region of 380 to 780 nm. The mirror surface average reflectance of 450-650 nm was used for the result.
Pencil hardness evaluation:
The antireflection film was conditioned at a temperature of 25 ° C. and a humidity of 60% RH for 2 hours, and then pencil hardness evaluation described in JIS K 5400 was performed.
Evaluation of scratch resistance:
About the produced membrane | film | coat, the film | membrane surface was rubbed 10 times under the load of 1000 g / cm < ² > using steel wool # 0000, Then, the level which gets damaged was confirmed. The determination was in accordance with the following criteria.
Not at all ： ○
Small scratches: △
Scratch is remarkable: ×

As is clear from the above results, the coating film and the antireflection film using the fluorine-containing compound of R4 have a high refractive index, a high reflectance, and insufficient hardness, scratch resistance, and antifouling properties. Met. In addition, the coating film and the antireflection film using the fluorine-containing compound of R5 had low pencil hardness and insufficient scratch resistance and antifouling properties.
On the other hand, the coating film and the antireflection film using the polymerizable fluorine-containing multi-compound of the present invention have a high fluorine content and a large number of polymerizable groups, while having a low refractive index and a low reflectance, It had excellent hardness, scratch resistance, and antifouling properties. In addition, among those using the polymerizable fluorine-containing compound of the present invention, the higher the fluorine content, the more advantageous from the viewpoint of reflectance, and the more the number of polymerizable groups contained in one molecule, the higher the hardness. It can be seen that this is advantageous in terms of scratch resistance.

Based on the above results, an antireflection film sample (Table 2) and an antireflection film sample (Table 3) having the same fluorine content and cross-linking molecular weight in the polymerizable monomer (refractive index or reflectance is a predetermined value). ), The sample of the present invention was compared with the comparative sample.
Specifically, (1) a sample using the compound M5 of the present invention and a sample using the comparative compound R1, (2) a sample using the compound M13 of the present invention and a sample using the comparative compound R2, (3) A sample using the compound M17 of the present invention was compared with a sample using the comparative compound R3. As a result, regarding the hardness and scratch resistance, it can be seen that the sample using the polymerizable fluorine-containing compound of the present invention is superior to any of the comparative examples in any comparison. This shows that the polymerizable fluorine-containing compound of the present invention can provide an antireflection film and an antireflection film having high hardness and excellent scratch resistance in desired optical characteristics.

<Example 5>
An image display device was produced using the antireflection films (P-1, 2, 4, 6, and 8) of the present invention. All of these image display devices were excellent in surface strength while preventing a decrease in contrast and reflection of an image due to reflection of external light.

<Example 6. Evaluation of water-repellent polyurethane composition>
(Preparation of hydroxyl-terminated liquid polyisoprene)
In a 1 liter stainless steel pressure-resistant reaction vessel, 200 g of isoprene, 100 g of hydrogen peroxide having a concentration of 30% and 300 g of isopropanol were charged, and the reaction was performed at a temperature of 116 ° C. and a reaction time of 2.4 hours. During the reaction, the pressure rose to a maximum of 7.1 kg / cm ² G. After the reaction was completed, the reaction mixture was placed in a separatory funnel, 600 g of water was added, shaken and allowed to stand for 3 hours, and then the oil layer was separated. From this oil layer, the solvent, monomer, and low-boiling components were distilled off under conditions of 2 mmHg and 100 ° C. for 2 hours to obtain liquid polyisoprene having a hydroxyl group at the molecular chain terminal (yield 70% by weight). This had a number average molecular weight of 1350, a hydroxyl group content of 1.54 meq / g, and a viscosity of 45 poise / 30 ° C. At this time, the average number of hydroxyl groups per molecule is 2.13. The structure analysis result by ¹ H-NMR shows that the trans-1,4 structure is 56 mol%, the cis-1,4 structure is 34 mol%, the 1,2 structure is 6 mol%, and the 3,4 structure is 4 mol%. %Met.

(Creation and evaluation of cured polyurethane)
Other components excluding the diisocyanate compound were mixed from the formulation shown in Table 4 and stirred at 60 ° C. for 2 hours. A diisocyanate compound was added to the mixture at a ratio shown in Table 4, and the mixture was stirred at 60 ° C. for 2 minutes to obtain a liquid polymer composition. This was poured onto a 300 × 150 × 2 mm mold, pressed at 60 ° C. for 2 hours, and then cured at 60 ° C. for 15 hours to obtain a cured product. Table 5 shows the results of evaluating the compatibility of the liquid mixture, the water repellency of the cured product, the presence or absence of bleed and tack, and the scratch resistance.

* 1: Hydroxyl-terminated liquid polyisoprene synthesized above, hydroxyl content = 1.54 meq / g
* 2: Carbodiimide-modified diphenylmethane diisocyanate (isocyanate content 29%)
* 3: HOCH ₂ (CF ₂ ) ₈ CH ₂ OH hydroxyl group content = 4.33 meq / g, melting point 124-128 ° C.
II-1: hydroxyl group content = 4.46 meq / g, viscous oil
III-1: hydroxyl group content = 5.00 meq / g, viscous oil * 4: dibutyltin dilaurate

(Compatibility evaluation)
Other components excluding the diisocyanate compound were mixed from the formulation shown in Table 4, the appearance after 15 hours at 150 ° C. was observed, and evaluated in the following three stages.
○: Uniform transparency, △: White turbidity, ×: Two-layer separation (contact angle)
The contact angle of water with the cured product obtained as described above was measured using a CA-X contact angle meter (manufactured by Kyowa Interface Science Co., Ltd.) at a measurement temperature of 20 ° C. The larger the contact angle, the higher the sample water repellency.
(Check bleed and tack)
The cured product obtained as described above was allowed to stand at room temperature for 1 week, and the presence or absence of tackiness due to visual bleed confirmation and finger touch was confirmed.
(Abrasion resistance)
The surface of the cured product obtained as described above was rubbed 10 times under a load of 100 g / cm ² using steel wool # 0000, and then the level of scratches was observed and evaluated in the following three stages.
○: Almost no scratches are observed, Δ: Fine scratches are observed, ×: Significant scratches are observed

FIG. 1 is a cross-sectional view schematically showing one embodiment of the antireflection film of the present invention. FIG. 2 is a cross-sectional view schematically showing another embodiment of the antireflection film of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Antireflection film 2 Transparent support 3 Hard coat layer 5 Low refractive index layer 6 Antireflection film 7 Middle refractive index layer 8 High refractive index layer

Claims (16)

A polymerizable fluorine-containing compound represented by the following general formula (I) having a fluorine content of 35% by mass or more with respect to the molecular weight of the fluorine-containing compound, and is obtained by polymerization when the compound is polymerized. A polymerizable fluorine-containing compound characterized in that the calculated molecular weight between crosslinks of the coal is 300 or less.

[Wherein, Rf ₁ represents a linear or cyclic (m + n) -valent fluorinated hydrocarbon group containing at least a carbon atom and a fluorine atom, and may contain an oxygen atom and / or a hydrogen atom. Rf ₂ represents a linear or cyclic monovalent fluorinated hydrocarbon group containing at least a carbon atom and a fluorine atom, and may contain an oxygen atom and / or a hydrogen atom. m and n each independently represents an integer of 0 or more (provided that m + n ≧ 2). Q represents a polymerizable group. However, the plurality of Rf ₂ may be the same or different, and when n is 2 or more, the plurality of Q may be the same or different. ] In the general formula (I), Q is —COC (R ₀ ) ═CH ₂ , an allyl group, an epoxyalkylene group, — (CH ₂ ) _x Si (OW) ₃ , — (CH ₂ ) _y NCO or — (CH ₂ ) _z CN (wherein R ₀ represents a hydrogen atom, a halogen atom or an alkyl group which may have a substituent. W represents an alkoxy group or a hydroxyl group. X, y and z each represents an integer of 1 or more. 3. The polymerizable fluorine-containing compound according to claim 1, wherein three Ws may be different from each other. The polymerizable fluorine-containing compound according to claim 1 or 2, wherein the compound represented by the general formula (I) is a compound represented by the following general formula (Ia).

[Wherein, Rf ₁ , Rf ₂ , m and n each have the same meaning as in the general formula (I), and R represents a hydrogen atom, a fluorine atom, a methyl group or a trifluoromethyl group. ]   The polymerizable fluorine-containing compound according to claim 3, wherein R is a hydrogen atom in the compound represented by the general formula (Ia).   The polymerizable fluorine-containing compound according to any one of claims 1 to 4, wherein m is 0 and n is an integer of 3 to 6. Rf ₂ is a trifluoromethyl group, The polymerizable fluorine-containing compound according to claim 1, wherein Rf ₂ is a trifluoromethyl group.   The polymerizable fluorine-containing compound according to claim 1, wherein the polymerizable fluorine-containing compound is produced using a liquid phase fluorination technique.   An antireflection film comprising a low refractive index layer obtained by curing a curable resin composition containing at least one polymerizable fluorine-containing compound according to any one of claims 1 to 7.   An antireflection film comprising a low refractive index layer obtained by curing the curable resin composition containing the polymerizable fluorine-containing compound according to any one of claims 1 to 7 and inorganic oxide fine particles. .   The antireflection film according to claim 9, wherein the inorganic oxide fine particles are hollow silica fine particles.   The antireflection film according to any one of claims 8 to 10 is provided on a transparent support.   An image display device comprising the antireflection film according to claim 11. A composition for water-repellent polyurethane comprising at least (A) a polyol compound, (B) a polyisocyanate compound, and (C) a fluorinated alcohol represented by the following general formula (II) and / or (III).

[Wherein, Rf ₁ represents a linear or cyclic q-valent fluorinated hydrocarbon group containing at least a carbon atom and a fluorine atom, and may contain an oxygen atom and / or a hydrogen atom. q represents an integer of 2 or more. Rf ₂ represents a linear or cyclic monovalent fluorinated hydrocarbon group containing at least a carbon atom and a fluorine atom, and may contain an oxygen atom and / or a hydrogen atom. In the above formula, the hydrogen atom of the hydroxyl group of the methylol group may be substituted with a polymerizable group Q, and the fluorine content of the compound into which Q is introduced is 35% by mass or more with respect to the molecular weight of the compound. When the polymer is polymerized, the calculated values of the molecular weight between crosslinks of the polymer obtained by polymerization are all 300 or less. When n is 2 or more, the plurality of Qs may be the same or different. ] A composition for water-repellent polyurethane comprising at least one of (A) a polyol compound, (B) a polyisocyanate compound and (C) a fluorinated alcohol represented by the following formula (II-1) or (III-1).

A fluorine-containing alcohol represented by the following general formula (II) or (III).

[Wherein, Rf ₁ represents a linear or cyclic q-valent fluorinated hydrocarbon group containing at least a carbon atom and a fluorine atom, and may contain an oxygen atom and / or a hydrogen atom. q represents an integer of 2 or more. Rf ₂ represents a linear or cyclic monovalent fluorinated hydrocarbon group containing at least a carbon atom and a fluorine atom, and may contain an oxygen atom and / or a hydrogen atom. In the above formula, the hydrogen atom of the hydroxyl group of the methylol group may be substituted with a polymerizable group Q, and the fluorine content of the compound into which Q is introduced is 35% by mass or more with respect to the molecular weight of the compound. When the polymer is polymerized, the calculated values of the molecular weight between crosslinks of the polymer obtained by polymerization are all 300 or less. When n is 2 or more, the plurality of Qs may be the same or different. ] Fluorine-containing alcohol represented by the following general formula (II-1) or (III-1).

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