WO2017175679A1 - ポリイミド樹脂組成物及びその製造方法、並びにポリイミドフィルム - Google Patents
ポリイミド樹脂組成物及びその製造方法、並びにポリイミドフィルム Download PDFInfo
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- WO2017175679A1 WO2017175679A1 PCT/JP2017/013650 JP2017013650W WO2017175679A1 WO 2017175679 A1 WO2017175679 A1 WO 2017175679A1 JP 2017013650 W JP2017013650 W JP 2017013650W WO 2017175679 A1 WO2017175679 A1 WO 2017175679A1
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- 0 C*(C)**(C(*1(C(N2*(C)C)=*)C2=O)=*)C1=O Chemical compound C*(C)**(C(*1(C(N2*(C)C)=*)C2=O)=*)C1=O 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1075—Partially aromatic polyimides
- C08G73/1078—Partially aromatic polyimides wholly aromatic in the diamino moiety
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1003—Preparatory processes
- C08G73/1007—Preparatory processes from tetracarboxylic acids or derivatives and diamines
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- C—CHEMISTRY; METALLURGY
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- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1003—Preparatory processes
- C08G73/1007—Preparatory processes from tetracarboxylic acids or derivatives and diamines
- C08G73/1021—Preparatory processes from tetracarboxylic acids or derivatives and diamines characterised by the catalyst used
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- C—CHEMISTRY; METALLURGY
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- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1003—Preparatory processes
- C08G73/1007—Preparatory processes from tetracarboxylic acids or derivatives and diamines
- C08G73/1028—Preparatory processes from tetracarboxylic acids or derivatives and diamines characterised by the process itself, e.g. steps, continuous
- C08G73/1032—Preparatory processes from tetracarboxylic acids or derivatives and diamines characterised by the process itself, e.g. steps, continuous characterised by the solvent(s) used
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J3/00—Processes of treating or compounding macromolecular substances
- C08J3/20—Compounding polymers with additives, e.g. colouring
- C08J3/205—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase
- C08J3/21—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase the polymer being premixed with a liquid phase
- C08J3/215—Compounding polymers with additives, e.g. colouring in the presence of a continuous liquid phase the polymer being premixed with a liquid phase at least one additive being also premixed with a liquid phase
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- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
- C08L79/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08L79/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2379/00—Characterised by the use of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen, or carbon only, not provided for in groups C08J2361/00 - C08J2377/00
- C08J2379/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08J2379/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2206—Oxides; Hydroxides of metals of calcium, strontium or barium
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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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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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
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2244—Oxides; Hydroxides of metals of zirconium
Definitions
- the present invention relates to a polyimide resin composition, a method for producing the same, and a polyimide film.
- polyimide resins are obtained from aromatic tetracarboxylic anhydrides and aromatic diamines, and have excellent heat resistance, chemical resistance, mechanical properties, and electrical properties due to molecular rigidity, resonance stabilization, and strong chemical bonds. Therefore, it is widely used in the fields of molding materials, composite materials, electric / electronic parts, optical materials, displays and the like.
- titanium dioxide powder is white and has a high hiding power, so it is used as a white pigment and is widely used in paints, printed materials, cosmetics and the like.
- crystal systems of titanium dioxide There are three types of crystal systems of titanium dioxide: anatase type, rutile type, and perovskite type.
- Titanium dioxide makes it possible to prevent light scattering in the visible light region by making it into fine particles, and it becomes colorless and transparent and exhibits the effect of shielding and absorbing ultraviolet rays. Therefore, it is blended and used in sunscreen cosmetics, ultraviolet shielding agents, ultraviolet shielding films, antireflection films and the like. Since anatase-type titanium dioxide fine particles have a high photocatalytic effect of absorbing ultraviolet rays and decomposing surrounding organic substances, they are put to practical use as a self-cleaning technique and a deodorizing functional material for residential walls.
- Patent Document 1 discloses a composition in which inorganic fine particles having a refractive index of 1.6 or more and a transparent resin such as an acrylic resin, a polyester resin, an epoxy resin, or a polycarbonate resin, for example, Patent Document 2 discloses an aromatic polyimide.
- Highly refractive and highly transparent heat-resistant optical material comprising, for example, an inorganic oxide, for example, Patent Document 3 discloses a resin for optical material in which titanium dioxide is coated with a silicon oxide-containing material.
- Patent Documents 1 to 3 have the effect of increasing the refractive index, they are not sufficient as materials having all of transparency, heat resistance, and high refractive index.
- an object of the present invention is to solve the problems of the prior art, and it is possible to form a polyimide resin film having a high refractive index and transparency and heat resistance. It is providing the polyimide resin composition and its manufacturing method.
- the present inventors have obtained a polyimide resin composition comprising an alicyclic polyimide resin having a specific structural unit and predetermined inorganic particles such as titanium dioxide. It has been found that the above-mentioned purpose is met. The present invention has been completed based on this finding.
- An alicyclic polyimide resin comprising an alicyclic polyimide resin having a structural unit represented by the following general formula (1), and at least one inorganic particle selected from titanium dioxide, barium titanate, and zirconium oxide.
- the polyimide resin composition whose glass transition temperature of a polyimide resin is 260 degreeC or more.
- R 1 is a tetravalent alicyclic hydrocarbon group having 4 to 22 carbon atoms
- R 2 is a divalent aliphatic hydrocarbon group having 2 to 28 carbon atoms and / or carbon number. 6 to 27 divalent aromatic hydrocarbon groups.
- An inorganic containing a polyimide resin solution containing an alicyclic polyimide resin having a structural unit represented by the following general formula (1), and at least one inorganic particle selected from titanium dioxide, barium titanate, and zirconium oxide A method for producing a polyimide resin composition comprising a step of mixing with a particle dispersion, wherein the inorganic particle dispersion has a solid content concentration of 10 to 50% by mass.
- R 1 is a tetravalent alicyclic hydrocarbon group having 4 to 22 carbon atoms
- R 2 is a divalent aliphatic hydrocarbon group having 2 to 28 carbon atoms and / or carbon number. 6 to 27 divalent aromatic hydrocarbon groups.
- a polyimide resin composition capable of forming a polyimide resin film having a high refractive index, transparency and heat resistance, and a method for producing the same.
- the polyimide resin composition of the present invention comprises an alicyclic polyimide resin having a structural unit represented by the following general formula (1), and at least one inorganic particle selected from titanium dioxide, barium titanate, and zirconium oxide. And a polyimide resin composition in which the glass transition temperature of the alicyclic polyimide resin is 260 ° C. or higher.
- the alicyclic polyimide resin has a repeating unit represented by the general formula (1), and R 1 in the formula (1) is a tetravalent alicyclic hydrocarbon group having 4 to 22 carbon atoms.
- R 2 is a divalent aliphatic hydrocarbon group having 2 to 28 carbon atoms and / or a divalent aromatic hydrocarbon group having 6 to 27 carbon atoms.
- the “alicyclic hydrocarbon group” means a group containing an alicyclic hydrocarbon structure.
- the polyimide resin used in the present invention is particularly excellent in transparency and heat resistance.
- the alicyclic hydrocarbon structure may be saturated or unsaturated, but is preferably a saturated alicyclic hydrocarbon structure from the viewpoint of transparency.
- R 1 in the general formula (1) may have at least one alicyclic hydrocarbon structure.
- R 1 has 4 to 22 carbon atoms, preferably 4 to 18 carbon atoms, and more preferably 6 to 16 carbon atoms.
- Examples of the alicyclic hydrocarbon structure include cycloalkane rings such as cyclobutane ring, cyclopentane ring and cyclohexane ring, cycloalkene rings such as cyclohexene ring, bicycloalkane rings such as norbornane ring, and bicycloalkene rings such as norbornene. It is done.
- R 1 is preferably composed only of an alicyclic hydrocarbon structure.
- the alicyclic polyimide resin having a repeating unit represented by the general formula (1) is an alicyclic tetracarboxylic acid or a derivative thereof containing a tetravalent alicyclic hydrocarbon group having 4 to 22 carbon atoms as described later. And an aliphatic diamine containing a divalent aliphatic hydrocarbon group having 2 to 28 carbon atoms and / or an aromatic diamine containing a divalent aromatic hydrocarbon group having 6 to 27 carbon atoms in a specific organic solvent. It is obtained by reacting in
- Examples of the alicyclic tetracarboxylic acid containing a tetravalent alicyclic hydrocarbon group having 4 to 22 carbon atoms include 1,2,3,4-cyclobutanetetracarboxylic acid, 1,2,4,5-cyclopentanetetra Carboxylic acid, 1,2,4,5-cyclohexanetetracarboxylic acid, bicyclo [2.2.2] oct-7-ene-2,3,5,6-tetracarboxylic acid, dicyclohexyltetracarboxylic acid, or these And positional isomers.
- Examples of the tetracarboxylic acid derivative containing a tetravalent alicyclic hydrocarbon group having 4 to 22 carbon atoms include anhydrides or alkyl esters of the tetracarboxylic acid.
- the tetracarboxylic acid derivative preferably has 8 to 38 carbon atoms.
- Examples of the tetracarboxylic acid anhydride containing an alicyclic hydrocarbon structure include 1,2,3,4-cyclobutanetetracarboxylic dianhydride, 1,2,4,5-cyclopentanetetracarboxylic dianhydride, 1,2,4,5-cyclohexanetetracarboxylic dianhydride, bicyclo [2.2.2] oct-7-ene-2,3,5,6-tetracarboxylic dianhydride, dicyclohexyltetracarboxylic dianhydride Examples thereof include anhydrides and positional isomers thereof.
- the alkyl ester of a tetracarboxylic acid containing a tetravalent alicyclic hydrocarbon group having 4 to 22 carbon atoms preferably has 1 to 3 carbon atoms in the alkyl.
- the alicyclic hydrocarbon structure described above is used. Dimethyl esters, diethyl esters, and dipropyl esters of tetracarboxylic acids containing
- tetracarboxylic acid or derivative thereof containing a tetravalent alicyclic hydrocarbon group having 4 to 22 carbon atoms at least one compound selected from the above may be used alone, or two or more compounds may be used in combination. May be.
- cycloalkanetetracarboxylic acid Of the tetracarboxylic acid components having an alicyclic hydrocarbon structure, cycloalkanetetracarboxylic acid, bicycloalkanetetracarboxylic acid or acid dianhydrides thereof are preferable, and cycloalkanetetracarboxylic acid having 4 to 6 ring member carbon atoms.
- Bicycloalkanetetracarboxylic acids having 4 to 6 ring carbon atoms or acid dianhydrides thereof are more preferable, and 1,2,4,5-cyclohexanetetracarboxylic acid or acid dianhydrides thereof are more preferable.
- Examples of the aliphatic diamine containing a divalent aliphatic hydrocarbon group having 2 to 28 carbon atoms represented by R 2 include 4,4-diaminodicyclohexylmethane, isophoronediamine, ethylenediamine, tetramethylenediamine, norbornanediamine, 1,3-bis (aminomethyl) cyclohexane, 1,3-diaminocyclohexane, 1,4-diaminocyclohexane, hexamethylenediamine, 2,5-dimethylhexamethylenediamine, trimethylhexamethylenediamine, polyethylene glycol bis (3-amino Propyl) ether, polypropylene glycol bis (3-aminopropyl) ether, 1,3,5-tris (aminomethyl) benzene, 4,4-methylenebis (cyclohexylamine), bicyclohexyldiamine, siloxane di Examples include amines.
- diamines can be used alone or in combination of two or more.
- a diamine having an alicyclic structure such as 4,4-diaminodicyclohexylmethane, isophoronediamine, or 1,3-diaminocyclohexane from the viewpoint of easy molecular weight increase and excellent heat resistance.
- diamines can be used alone or in combination of two or more.
- Examples of the aromatic diamine containing a divalent aromatic hydrocarbon group having 6 to 27 carbon atoms represented by R 2 include 1,4-bis (4-amino- ⁇ , ⁇ -dimethylbenzyl) benzene, 4 , 4'-bis (4-aminophenoxy) biphenyl, 5-amino-1,3,3-trimethyl-1- (4-aminophenyl) -indane, 6-amino-1,3,3-trimethyl-1- (4-aminophenyl) -indane, 2,2′-dimethylbenzidine, 2,2′-bis (trifluoromethyl) benzidine, paraxylylenediamine, metaxylylenediamine, 4,4′-diaminodiphenyl ether, 3, 4'-diaminodiphenyl ether, 4,4'-diaminodiphenylmethane, 1,3-phenylenediamine, 1,4-phenylenediamine, 4,4'-diamino
- 5-amino-1,3,3-trimethyl-1- (4-aminophenyl) -indane (hereinafter sometimes referred to as “5-amino”)
- 6-amino-1,3,3- Trimethyl-1- (4-aminophenyl) -indane (hereinafter sometimes referred to as “6-amino form”) may be a mixture of these isomers, that is, amino-1,3,3 When used as -trimethyl-1- (4-aminophenyl) -indane, a 5-amino form and a 6-amino form may be mixed.
- 1,4-bis (4-amino- ⁇ , ⁇ -dimethylbenzyl) benzene and 4,4′-bis (4-aminophenoxy) biphenyl are easy in terms of high molecular weight and excellent heat resistance.
- 9,9-bis (4-aminophenyl) fluorene, 4,4′-diaminodiphenyl ether, 4,4′-diamino-2,2′-dimethoxybiphenyl, 4,4′-diamino-2,2′-bis It is preferable to use (trifluoromethyl) biphenyl.
- 1,4-bis (4-amino- ⁇ , ⁇ -dimethylbenzyl) benzene, 4,4′-bis (4-aminophenoxy) biphenyl 5- Amino-1,3,3-trimethyl-1- (4-aminophenyl) -indane, 6-amino-1,3,3-trimethyl-1- (4-aminophenyl) -indane, 2,2′-dimethyl Benzidine and 2,2′-bis (trifluoromethyl) benzidine are preferably used, and 1,4-bis (4-amino- ⁇ , ⁇ -dimethylbenzyl) benzene, 4,4′-bis (4-aminophenoxy) ) Biphenyl and 2,2′-dimethylbenzidine are more preferable, and 4,4′-bis (4-aminophenoxy) biphenyl is more preferable.
- a polyimide resin having a repeating unit represented by the general formula (2) is particularly preferable.
- R 3 in the general formula (2) is a divalent aliphatic hydrocarbon group having 2 to 28 carbon atoms and / or a divalent aromatic hydrocarbon group having 6 to 27 carbon atoms.
- R 3 has the same meaning as R 2 in the general formula (1), and the preferred range is also the same.
- the glass transition temperature of the alicyclic polyimide resin contained in the polyimide resin composition of the present invention is 260 ° C. or more from the viewpoint of heat resistance in actual use in an assumed application.
- the glass transition temperature is lower than 260 ° C., the heat resistance as the polyimide resin composition may be lowered.
- a preferred glass transition temperature range is 260-420 ° C.
- the polyimide resin composition of the present invention contains at least one inorganic particle selected from titanium dioxide, barium titanate, and zirconium oxide. Since these inorganic particles have a high refractive index, the refractive index of the formed polyimide film (polyimide film) can be increased.
- the average primary particle diameter of the inorganic particles is preferably 0.005 to 0.1 ⁇ m, and more preferably 0.005 to 0.05 ⁇ m.
- the average primary particle size is 0.005 ⁇ m or more, a productive and practical yield can be obtained. If the average primary particle size is 0.1 ⁇ m or less, it is possible to prevent the polyimide resin composition from becoming clouded, and the transparency of the polyimide film obtained from the polyimide resin composition can be improved.
- the average secondary particle diameter (D50) is preferably 0.005 to 0.15 ⁇ m, and preferably 0.005 to 0.1 ⁇ m. Is more preferably 0.005 to 0.05 ⁇ m.
- titanium dioxide is preferred because of its highest refractive index among titanium dioxide, barium titanate and zirconium oxide. Titanium dioxide may be either amorphous or crystalline, but crystalline titanium dioxide is preferably used as an effective choice for obtaining a high refractive index. There are three crystal systems, anatase type, rutile type, and perovskite type. Among them, anatase type and rutile type are preferable.
- the average primary particle diameter of titanium dioxide is preferably 0.005 to 0.1 ⁇ m, more preferably 0.005 to 0.05 ⁇ m.
- the average primary particle size is 0.005 ⁇ m or more, a productive and practical yield can be obtained. If the average primary particle size is 0.1 ⁇ m or less, it is possible to prevent the polyimide resin composition from becoming clouded, and the transparency of the polyimide film obtained from the polyimide resin composition can be improved.
- the average secondary particle diameter (D50) is preferably 0.005 to 0.15 ⁇ m, and more preferably 0.005 to 0.1 ⁇ m. More preferably, the thickness is 0.005 to 0.05 ⁇ m.
- the average primary particle size and the average secondary particle size (D50) are the average primary particle size is an electron microscope such as TEM, and the average secondary particle size (D50) is the microtrack particle size distribution measuring device “9320”. -HRA "(manufactured by Nikkiso Co., Ltd.).
- the polyimide resin composition of the present invention preferably contains 2 to 60% by mass of the alicyclic polyimide resin having the structural unit represented by the general formula (1), more preferably 3 to 45% by mass. The content is preferably 4 to 8% by mass.
- the polyimide resin composition of the present invention preferably contains 2 to 80% by mass of at least one inorganic particle selected from titanium dioxide, barium titanate, and zirconium oxide, and more preferably contains 3 to 65% by mass. 7 to 12% by mass is more preferable.
- the ratio of the inorganic particles to the total amount of the alicyclic polyimide resin and the inorganic particles is preferably 40 to 80% by mass and more preferably 50 to 70% by mass from the viewpoint of refractive index. Preferably, it is 55 to 65% by mass.
- the polyimide resin composition of the present invention may contain various additives in addition to the alicyclic polyimide resin described above and the inorganic particles described above as long as the effects of the present invention are not impaired.
- additives include compounds such as organic solvents, antioxidants, light stabilizers, surfactants, flame retardants, plasticizers, polyimide resins other than the alicyclic polyimide resins, polyamide resins, and polyamideimides.
- the method for producing a polyimide resin composition according to the present invention includes a polyimide resin solution (hereinafter referred to as “polyimide resin solution (X)”) containing an alicyclic polyimide resin having a structural unit represented by the general formula (1). May be referred to as an inorganic particle dispersion (hereinafter referred to as “inorganic particle dispersion (Y)”) including at least one inorganic particle selected from titanium dioxide, barium titanate, and zirconium oxide. And a step of mixing.
- the inorganic particle dispersion (Y) a dispersion having a solid content concentration of 10 to 50% by mass is used.
- the alicyclic polyimide resin is synthesized by dehydrating imidation reaction of alicyclic tetracarboxylic acid or its derivative and diamine in an organic solvent, and thus a solution of the alicyclic polyimide resin is produced. Is done.
- Specific examples of the method for producing an alicyclic polyimide resin solution include an alicyclic tetracarboxylic acid or a derivative thereof, and if necessary, an imidization catalyst in an organic solvent solution in which a diamine is dissolved in a temperature range of 30 to 90 ° C.
- a polyamic acid solution is obtained by maintaining the temperature at 30 to 90 ° C., and then an imidization catalyst is added to perform a dehydration imidation reaction while distilling the generated water out of the system to obtain an alicyclic polyimide resin.
- an imidization catalyst is added to perform a dehydration imidation reaction while distilling the generated water out of the system to obtain an alicyclic polyimide resin.
- a known imidation catalyst can be used.
- the imidization catalyst include a base catalyst or an acid catalyst. Specifically, triethylamine, tripropylamine, tributylamine, pyridine, quinoline, isoquinoline, ⁇ -picoline, ⁇ -picoline, N, N-dimethylaniline, N Tertiary amines such as N, diethylaniline, or acids such as crotonic acid, benzoic acid, methylbenzoic acid, oxybenzoic acid, benzenesulfonic acid, paratoluenesulfonic acid, etc. can be used. It is preferable to do this.
- the imidization catalyst may be added before the addition of the alicyclic tetracarboxylic acid or its derivative, and in that case, it should be kept at a temperature around room temperature or lower, which is a reaction condition for forming a polyamic acid. However, heating can be started immediately and dehydration imidation reaction can be performed.
- the appropriate molar ratio of these imidization catalyst and diamine is preferably in the range of 0.01 to 1.0, particularly preferably in the range of 0.05 to 0.5. When the molar ratio of the imidization catalyst and diamine is 0.01 or more, good catalytic action is exhibited and the imidization reaction is promoted. When it is 1.0 or less, the imidation catalyst itself is easily removed, coloring is suppressed in the subsequent step, and the solubility of the alicyclic polyimide resin solution is not affected.
- the molar ratio of diamine and alicyclic tetracarboxylic acid or derivative thereof used in the synthesis of alicyclic polyimide resin is 0.95 to 1.05.
- a range is preferable, and a range of 0.99 to 1.01 is particularly preferable.
- the molecular weight is prevented from being lowered, and the film becomes brittle when filmed in a later step. Can be prevented.
- the distillate containing water as a main component is removed from the reaction system by a steam cooling tower attached to the upper part of the reaction tank and a distillate storage device engaged therewith.
- the reaction temperature is usually in the range of 160 to 200 ° C, preferably in the range of 170 to 190 ° C, more preferably in the range of 180 to 190 ° C.
- an azeotropic dehydrating agent such as toluene or xylene may be used.
- the reaction pressure is usually atmospheric pressure, but the reaction can also be carried out under pressure as necessary.
- the holding time for the reaction temperature is at least 1 hour, more preferably 3 hours or more. When it is 1 hour or longer, imidization and high molecular weight can be sufficiently advanced. Although there is no upper limit on the reaction time, it is usually carried out in the range of 3 to 10 hours.
- the organic solvent used when synthesizing the alicyclic polyimide resin is preferably a solvent containing at least one structure selected from the group consisting of cyclic ether, cyclic ketone, cyclic ester, amide, and urea.
- N-methyl-2-pyrrolidone N, N-dimethylacetamide (DMAc), ⁇ -butyrolactone, N, N-dimethylformamide, dimethyl sulfoxide, hexamethylphosphoramide, tetramethylene
- DMAc N-methyl-2-pyrrolidone
- ⁇ -butyrolactone N, N-dimethylformamide
- dimethyl sulfoxide hexamethylphosphoramide
- tetramethylene It preferably contains at least one selected from aprotic polar organic solvents such as sulfone, p-chlorophenol, m-cresol, 2-chloro-4-hydroxytoluene and 1,3-dioxolane.
- aprotic polar organic solvents such as sulfone, p-chlorophenol, m-cresol, 2-chloro-4-hydroxytoluene and 1,3-dioxolane.
- the solid content concentration of the alicyclic polyimide resin with respect to the total mass including the organic solvent in the synthesis step of the alicyclic polyimide resin is preferably 20% by mass to 50% by mass, and more preferably 30% by mass to 40% by mass. It is as follows. When the content is 20% by mass or more, the intrinsic viscosity of the alicyclic polyimide resin is increased, the molecular weight is sufficiently increased, and the film can be prevented from becoming brittle when the film is formed in a subsequent process. Moreover, when it is 50 mass% or less, the viscosity of an alicyclic polyimide resin solution does not rise too much, but it becomes easy to perform stirring uniformly.
- the temperature for dissolving in the organic solvent is preferably at least 20 ° C. or higher, and more preferably in the temperature range of 30 ° C. to 100 ° C. When the temperature is 20 ° C. or higher, the solution viscosity is appropriate and easy to handle.
- the alicyclic polyimide resin solution produced as described above may be used as the polyimide resin solution (X) without being diluted as it is, or after being diluted by adding an organic solvent, the polyimide resin solution (X). May be used as That is, the alicyclic polyimide resin solution may be mixed with the inorganic particle dispersion without being diluted as it is, or after being diluted by adding an organic solvent to the alicyclic polyimide resin solution and mixing with the inorganic particle dispersion. Also good.
- the solvent of the polyimide resin solution (X) includes an organic solvent used during the synthesis of the alicyclic polyimide resin and an organic solvent added to the alicyclic polyimide resin solution as necessary.
- the solid content concentration of the polyimide resin solution (X) is preferably 10 to 20% by mass, more preferably 10 to 15% by mass, from the viewpoint of stability after mixing the inorganic fine particles.
- the inorganic particle dispersion (Y) contains at least one inorganic particle selected from titanium dioxide, barium titanate, and zirconium oxide.
- the solid content concentration of the inorganic particle dispersion (Y) is 10 to 50% by mass, preferably 10 to 40% by mass, more preferably 10 to 30% by mass, and 10 to 20% by mass. More preferably it is. If the solid content concentration is less than 10% by mass, the productivity is lowered. When the solid content concentration exceeds 50% by mass, dispersion becomes difficult and sedimentation tends to occur.
- the dispersion medium of the inorganic particle dispersion liquid (Y) is preferably one having good compatibility with the solvent of the polyimide resin solution (X).
- examples of such a dispersion medium include N, N-dimethylacetamide, N, N-dimethylformamide, N, N, 2-trimethylpropionamide, ⁇ -butyrolactone (GBL), dimethyl sulfoxide, cyclopentanone, propylene glycol monomethyl ether And propylene glycol monomethyl ether acetate, and the inorganic particle dispersion (Y) preferably contains any one selected from these dispersion media.
- the proportion of the dispersion medium in the inorganic particle dispersion liquid (Y) is preferably 50% by mass or more, more preferably 60% by mass or more, further preferably 70% by mass or more, and 80 It is particularly preferable that the content is at least mass%.
- titanium dioxide is preferable because of its highest refractive index among titanium dioxide, barium titanate and zirconium oxide.
- the suitable aspect of titanium dioxide said [1.
- the titanium source of titanium dioxide include titanium dioxide powder, titanium alkoxide, titanium acetyl acetate, titanium tetrachloride, and titanium sulfate.
- the solid content concentration of the titanium dioxide dispersion is 10 to 50% by mass, preferably 10 to 40% by mass, more preferably 10 to 30% by mass, and further preferably 10 to 20% by mass. preferable. If the solid content concentration is less than 10% by mass, the productivity is lowered. When the solid content concentration exceeds 50% by mass, dispersion becomes difficult and sedimentation tends to occur.
- the titanium dioxide dispersion can be obtained by mixing and stirring a titanium source and a dispersion medium in an arbitrary order.
- titanium alkoxide other than titanium dioxide powder titanium acetyl acetate, titanium tetrachloride, or titanium sulfate is used, it is preferable to mix and stir in the presence of water because a chemical reaction is required. By operating in the presence of water, crystallinity can be improved and the refractive index becomes higher. Furthermore, it is preferable to mix the organic acid after reacting the titanium source with water because the dispersion stability is improved.
- organic acid examples include methanol, ethanol, 2-propanol, n-butanol, 2-butanol, ethyl acetate, acetone, methyl ethyl ketone, and methyl isobutyl ketone, but are not particularly limited.
- a method of adding a specific dispersion medium after removing water or an organic acid with a rotary evaporator is used.
- the dispersion medium used for the titanium dioxide dispersion is preferably one having good compatibility with the solvent of the polyimide resin solution (X).
- Examples of compatible dispersion media include N, N-dimethylacetamide, N, N-dimethylformamide, N, N, 2-trimethylpropionamide, ⁇ -butyrolactone, dimethyl sulfoxide, cyclopentanone, propylene glycol monomethyl ether And propylene glycol monomethyl ether acetate.
- the proportion of the dispersion medium contained in the titanium dioxide dispersion is preferably 50% by mass or more, more preferably 60% by mass or more, and further preferably 70% by mass or more. It is particularly preferable that the content is at least mass%.
- the polyimide resin composition of the present invention is produced by mixing the polyimide resin solution (X) as described above and the inorganic particle dispersion (Y) by a known method.
- polyimide film Although the polyimide resin composition of this invention can be used for various uses, it fully exhibits a function as a polyimide film obtained by removing an organic solvent.
- a polyimide film is produced by casting a solution of a polyimide resin composition containing a polyimide resin on a smooth support such as a glass plate, a metal plate, or a plastic film, and evaporating the organic solvent component by heating. it can. That is, the polyimide film of the present invention is obtained as a cured product of the polyimide resin composition of the present invention.
- the self-supporting film is peeled off from the support, and the self-supporting film It is preferable to fix the edge part of this and to dry at the temperature of the boiling point of the organic solvent used and 350 degrees C or less, and to manufacture a polyimide film. Moreover, it is preferable to dry in nitrogen atmosphere.
- the pressure of the dry atmosphere may be any of reduced pressure, normal pressure, and increased pressure.
- the thickness of the polyimide film is arbitrarily prepared and is not particularly limited, but is preferably 1 to 200 ⁇ m, more preferably 1 to 100 ⁇ m, and further preferably 5 to 100 ⁇ m.
- the polyimide film preferably has a total light transmittance of 75% or more at a thickness of 1 ⁇ m, more preferably 85% or more, and further preferably 90% or more.
- the refractive index nD (refractive index of wavelength 589.3 nm) is preferably 1.65 or more. Since the refractive index of the alicyclic polyimide resin is generally in the range of 1.53 to 1.65, as a combined effect of the titanium dioxide fine particles, the refractive index nD is preferably 1.65 or more. More preferably, it is more preferably 1.8 or more.
- the method of dispersing and mixing the polyimide resin composition of the present invention when preparing the polyimide film there is no particular limitation on the method of dispersing and mixing the polyimide resin composition of the present invention when preparing the polyimide film, and conventionally known methods can be applied. Examples thereof include a method of dispersing and mixing using an apparatus such as a paint shaker, a dissolver, a ball mill, a bead mill, a sand grind mill, and a rotation and revolution type agitator. In particular, when dispersing, it is preferable to improve dispersibility by using glass beads, zirconia beads or the like.
- the polyimide resin composition of the present invention has both a high refractive index, transparency and heat resistance, optical lenses such as CCD and CMOS sensors, sealing materials such as LEDs and organic EL, light extraction layers, and antireflection. It can be used widely and suitably for membranes, color filters, flexible displays and the like.
- the polyimide film obtained from the polyimide resin composition by adjusting the average primary particle diameter and / or average secondary particle diameter (D50) of the inorganic particles in the composition.
- the haze can be controlled while maintaining the transparency of the (polyimide film).
- an alicyclic polyimide resin having an alicyclic polyimide resin having a structural unit represented by the general formula (1), and at least one inorganic particle selected from titanium dioxide, barium titanate, and zirconium oxide.
- Synthesis of the alicyclic polyimide resin, preparation of the titanium dioxide dispersion, and evaluation of the performance of the polyimide resin composition were based on the following methods.
- Total light transmittance, haze The total light transmittance and haze of the polyimide film obtained from the polyimide resin composition were measured according to JIS K7105 using a color / turbidity simultaneous measuring device (COH400) manufactured by Nippon Denshoku Industries Co., Ltd.
- Solid content concentration The measurement of the solid content concentration of the alicyclic polyimide resin solution and the titanium dioxide dispersion was calculated from the sample mass difference before and after heating by heating the sample at 300 ° C. ⁇ 30 min in a small electric furnace MMF-1 manufactured by ASONE CORPORATION. .
- the film thickness of the polyimide film obtained from the polyimide resin composition was measured using a micrometer manufactured by Mitutoyo Corporation when the thickness was 10 ⁇ m or more. When the thickness was less than 10 ⁇ m, the thickness was calculated using a color 3D laser microscope VX-8710 manufactured by Keyence Corporation.
- Refractive index The refractive index of a polyimide film having a thickness of 20 ⁇ m obtained from the polyimide resin composition was measured using an Abbe refractometer DR-M4 / 1550 manufactured by Atago Co., Ltd. at D line: 589 nm and temperature: 23 ° C. In addition, the refractive index measured with D line is described as nD.
- the solution was obtained by stirring at 200 rpm under a nitrogen atmosphere at ° C. Further, 16.59 g (0.074 mol) of 1,2,4,5-cyclohexanetetracarboxylic dianhydride (manufactured by Mitsubishi Gas Chemical Co., Ltd.) as an alicyclic tetracarboxylic acid component and N, N as organic solvents -After adding 12.89 g of dimethylacetamide (Mitsubishi Gas Chemical Co., Ltd.) all at once, it heated with the mantle heater, and raised the temperature in a reaction system to 180 degreeC over about 20 minutes.
- the polyimide component was obtained by collecting the components to be distilled off and maintaining the reaction system temperature at 180 ° C.
- the polyimide resin solution obtained was applied on a glass plate, kept on a hot plate at 100 ° C. for 60 minutes, and the solvent was volatilized to obtain a colorless and transparent primary dry film having self-supporting property,
- the film was fixed to a stainless steel frame, heated in a hot air dryer at 250 ° C. for 2 hours to evaporate the solvent, and a film having a thickness of 30 ⁇ m was obtained.
- the disappearance of the raw material peak and the appearance of a peak derived from the imide skeleton were confirmed by FT-IR analysis of the obtained film.
- the film had a refractive index nD of 1.619 and a glass transition temperature of 303 ° C.
- the polyimide resin solution obtained was applied on a glass plate, kept on a hot plate at 100 ° C. for 60 minutes, and the solvent was volatilized to obtain a colorless and transparent primary dry film having self-supporting property,
- the film was fixed to a stainless steel frame, heated in a hot air dryer at 250 ° C. for 2 hours to evaporate the solvent, and a film having a thickness of 30 ⁇ m was obtained.
- the disappearance of the raw material peak and the appearance of a peak derived from the imide skeleton were confirmed by FT-IR analysis of the obtained film.
- the film had a refractive index nD of 1.597 and a glass transition temperature of 320 ° C.
- the polyimide resin solution obtained was applied on a glass plate, kept on a hot plate at 100 ° C. for 60 minutes, and the solvent was volatilized to obtain a colorless and transparent primary dry film having self-supporting property,
- the film was fixed to a stainless steel frame, heated in a hot air dryer at 250 ° C. for 2 hours to evaporate the solvent, and a film having a thickness of 30 ⁇ m was obtained.
- the disappearance of the raw material peak and the appearance of a peak derived from the imide skeleton were confirmed by FT-IR analysis of the obtained film.
- the film had a refractive index nD of 1.597 and a glass transition temperature of 397 ° C.
- Preparation Example 1 of Titanium Dioxide Dispersion 850 g of titanium dioxide powder (S-TAF 1500 series (Fuji Titanium Industry Co., Ltd. average primary particle size: 20 to 30 nm)), 85 g of pigment dispersant (DISPALON: DA325 (manufactured by Enomoto Kasei Co., Ltd.)), and GBL (Mitsubishi Chemical Corporation) 3850 g).
- the mixed liquid was dispersed for 1 hour and 15 minutes using a bead mill (manufactured by Nippon Coke Kogyo Co., Ltd., MSC mill) to obtain a titanium dioxide fine particle dispersion 1 having a solid concentration of 18% by mass.
- the average secondary particle size (D50) was 152.7 nm, confirming that a sufficiently homogeneous dispersion was obtained.
- Tianium dioxide dispersion preparation example 2 850 g of titanium dioxide powder (S-TAF 1500 series (Fuji Titanium Industry Co., Ltd. average primary particle size: 20 to 30 nm)), 85 g of pigment dispersant (DISPALON: DA325 (manufactured by Enomoto Kasei Co., Ltd.)), and GBL (Mitsubishi Chemical Corporation) 3850 g).
- the mixed liquid was dispersed for 11 hours using a bead mill (manufactured by Nippon Coke Industries Co., Ltd., MSC mill) to obtain a titanium dioxide fine particle dispersion 2 having a solid content concentration of 18% by mass.
- the average secondary particle size (D50) was 38.9 nm, confirming that a sufficiently homogeneous dispersion was obtained.
- Tianium dioxide dispersion preparation example 3 850 g of titanium dioxide powder (TTO-55 series (Ishihara Sangyo Co., Ltd. average primary particle size: 30 to 35 nm)), 255 g of pigment dispersant (DISPALON: DA325 (manufactured by Enomoto Kasei Co., Ltd.)), and GBL (Mitsubishi Chemical Corporation) 3850 g).
- the mixed solution was dispersed for 1 hour using a bead mill (manufactured by Nippon Coke Industries Co., Ltd., MSC mill) to obtain a titanium dioxide fine particle dispersion 3 having a solid content concentration of 17% by mass.
- the average secondary particle size (D50) was 153.0 nm, confirming that a sufficiently homogeneous dispersion was obtained.
- the titanium dioxide dispersion 5 was prepared by dispersing titanium dioxide powder (average primary particle size: 20 to 50 nm) in a dispersion medium (DMAc) so that the solid content concentration was 30% by mass.
- the average secondary particle diameter (D50) was 150 to 200 nm.
- the titanium dioxide dispersion 6 was prepared by dispersing titanium dioxide powder (average primary particle size: 100 nm) in a dispersion medium (GBL) so that the solid content concentration was 22.5% by mass.
- the average secondary particle diameter (D50) was 187 nm.
- the titanium dioxide dispersion 7 was prepared by dispersing titanium dioxide powder (average primary particle size: 50 nm) in a dispersion medium (GBL) so that the solid content concentration was 23.3 mass%.
- the average secondary particle diameter (D50) was 50 nm.
- Example 1 Polyimide resin solution (A) synthesized in Synthesis Example 1 (solid content 20% by mass) in a 300 ml four-necked round bottom flask equipped with a stainless steel half-moon stirring blade, nitrogen inlet tube, thermometer, and glass end cap 50 g and 50 g of GBL (Mitsubishi Chemical Co., Ltd.) were added, and the system temperature was 40 ° C. and stirred at a rotation speed of 200 rpm in a nitrogen atmosphere to obtain a diluted polyimide resin solution (A ′) (solid content concentration 10% by mass). .
- GBL Mitsubishi Chemical Co., Ltd.
- the glass substrate coated with the mixed solution was placed in a hot air dryer and treated at 60 ° C. for 10 minutes.
- the organic solvent was evaporated by heating at 250 ° C. for 2 hours in a hot air dryer to obtain a polyimide film having a thickness of 1 ⁇ m.
- the polyimide film had a haze value of 4% and a total light transmittance of 94%.
- the polyimide film has self-supporting property by applying the mixed solution obtained on a glass plate and heating it stepwise with a hot air dryer at 50 ° C. ⁇ 5 minutes, 80 ° C. ⁇ 5 minutes, 135 ° C. ⁇ 5 minutes.
- a primary dry film was obtained, and the film was further fixed to a stainless frame, and heated in a hot air dryer at 250 ° C. for 2 hours to evaporate the organic solvent, thereby obtaining a polyimide film having a thickness of 20 ⁇ m.
- the polyimide film had a haze value of 30%, a total light transmittance of 69%, and a refractive index of 1.87.
- Example 2 Similar to the one used in Example 1, a polyimide resin synthesized in Synthesis Example 1 was added to a 300 ml four-necked round bottom flask equipped with a stainless half-moon stirring blade, a nitrogen inlet tube, a thermometer, and a glass end cap. 50 g of solution (A) (solid content 20% by mass) and 50 g of GBL (Mitsubishi Chemical Co., Ltd.) were added, and the system was stirred at a system temperature of 40 ° C. and a nitrogen atmosphere at a rotation speed of 200 rpm, and diluted polyimide resin solution (A ′) (Solid content concentration 10 mass%) was obtained.
- A solid content 20% by mass
- GBL Mitsubishi Chemical Co., Ltd.
- the glass substrate coated with the mixed solution was placed in a hot air dryer and treated at 60 ° C. for 10 minutes.
- the organic solvent was evaporated by heating at 250 ° C. for 2 hours in a hot air dryer to obtain a polyimide film having a thickness of 1 ⁇ m.
- the polyimide film had a haze value of 1% and a total light transmittance of 94%.
- the polyimide film has self-supporting property by applying the mixed solution obtained on a glass plate and heating it stepwise with a hot air dryer at 50 ° C. ⁇ 5 minutes, 80 ° C. ⁇ 5 minutes, 135 ° C. ⁇ 5 minutes.
- a primary dry film was obtained, and the film was further fixed to a stainless frame, and heated in a hot air dryer at 250 ° C. for 2 hours to evaporate the organic solvent, thereby obtaining a polyimide film having a thickness of 20 ⁇ m.
- the polyimide film had a haze value of 7%, a total light transmittance of 71%, and a refractive index of 1.87.
- Example 3 Similar to the one used in Example 1, a polyimide resin synthesized in Synthesis Example 1 was added to a 300 ml four-necked round bottom flask equipped with a stainless half-moon stirring blade, a nitrogen inlet tube, a thermometer, and a glass end cap. 50 g of solution (A) (solid content 20% by mass) and 50 g of GBL (Mitsubishi Chemical Co., Ltd.) were added, and the system was stirred at a system temperature of 40 ° C. and a nitrogen atmosphere at a rotation speed of 200 rpm, and diluted polyimide resin solution (A ′) (Solid content concentration 10 mass%) was obtained.
- A solid content 20% by mass
- GBL Mitsubishi Chemical Co., Ltd.
- the glass substrate coated with the mixed solution was placed in a hot air dryer and treated at 60 ° C. for 10 minutes.
- the organic solvent was evaporated by heating at 250 ° C. for 2 hours in a hot air dryer to obtain a polyimide film having a thickness of 1 ⁇ m.
- the polyimide film had a haze value of 29% and a total light transmittance of 79%.
- the polyimide film has self-supporting property by applying the mixed solution obtained on a glass plate and heating it stepwise with a hot air dryer at 50 ° C. ⁇ 5 minutes, 80 ° C. ⁇ 5 minutes, 135 ° C. ⁇ 5 minutes.
- a primary dry film was obtained, and the film was further fixed to a stainless frame, and heated in a hot air dryer at 250 ° C. for 2 hours to evaporate the organic solvent, thereby obtaining a polyimide film having a thickness of 20 ⁇ m.
- the polyimide film had a haze value of 85%, a total light transmittance of 52%, and a refractive index of 1.85.
- Example 4 Similar to the one used in Example 1, a polyimide resin synthesized in Synthesis Example 1 was added to a 300 ml four-necked round bottom flask equipped with a stainless half-moon stirring blade, a nitrogen inlet tube, a thermometer, and a glass end cap. 50 g of solution (A) (solid content 20% by mass) and 50 g of GBL (Mitsubishi Chemical Co., Ltd.) were added, and the system was stirred at a system temperature of 40 ° C. and a nitrogen atmosphere at a rotation speed of 200 rpm, and diluted polyimide resin solution (A ′) (Solid content concentration 10 mass%) was obtained.
- A solid content 20% by mass
- GBL Mitsubishi Chemical Co., Ltd.
- the glass substrate coated with the mixed solution was placed in a hot air dryer and treated at 60 ° C. for 10 minutes.
- the organic solvent was evaporated by heating at 250 ° C. for 2 hours in a hot air dryer to obtain a polyimide film having a thickness of 1 ⁇ m.
- the polyimide film had a haze value of 30% and a total light transmittance of 91%.
- the mixed solution obtained on a glass plate has self-supporting property by applying the mixed solution obtained on a glass plate and heating it stepwise with a hot air dryer at 50 ° C. ⁇ 5 minutes, 80 ° C. ⁇ 5 minutes, 135 ° C. ⁇ 5 minutes.
- a primary dry film was obtained, and the film was further fixed to a stainless frame, and heated in a hot air dryer at 250 ° C. for 2 hours to evaporate the organic solvent, thereby obtaining a polyimide film having a thickness of 20 ⁇ m.
- the refractive index of the polyimide film was 1.85.
- Example 5 Similar to the one used in Example 1, a polyimide resin synthesized in Synthesis Example 1 was added to a 300 ml four-necked round bottom flask equipped with a stainless half-moon stirring blade, a nitrogen inlet tube, a thermometer, and a glass end cap. 50 g of solution (A) (solid content 20% by mass) and 50 g of GBL (Mitsubishi Chemical Co., Ltd.) were added, and the system was stirred at a system temperature of 40 ° C. and a nitrogen atmosphere at a rotation speed of 200 rpm, and diluted polyimide resin solution (A ′) (Solid content concentration 10 mass%) was obtained.
- A solid content 20% by mass
- GBL Mitsubishi Chemical Co., Ltd.
- the glass substrate coated with the mixed solution was placed in a hot air dryer and treated at 60 ° C. for 10 minutes.
- the organic solvent was evaporated by heating at 250 ° C. for 2 hours in a hot air dryer to obtain a polyimide film having a thickness of 1 ⁇ m.
- the polyimide film had a haze value of 31% and a total light transmittance of 58%.
- the mixed solution obtained on a glass plate has self-supporting property by applying the mixed solution obtained on a glass plate and heating it stepwise with a hot air dryer at 50 ° C. ⁇ 5 minutes, 80 ° C. ⁇ 5 minutes, 135 ° C. ⁇ 5 minutes.
- a primary dry film was obtained, and the film was further fixed to a stainless frame, and heated in a hot air dryer at 250 ° C. for 2 hours to evaporate the organic solvent, thereby obtaining a polyimide film having a thickness of 20 ⁇ m.
- the refractive index of the polyimide film was 1.85.
- Example 6 Similar to the one used in Example 1, a polyimide resin synthesized in Synthesis Example 1 was added to a 300 ml four-necked round bottom flask equipped with a stainless half-moon stirring blade, a nitrogen inlet tube, a thermometer, and a glass end cap. 50 g of solution (A) (solid content 20% by mass) and 50 g of GBL (Mitsubishi Chemical Co., Ltd.) were added, and the system was stirred at a system temperature of 40 ° C. and a nitrogen atmosphere at a rotation speed of 200 rpm, and diluted polyimide resin solution (A ′) (Solid content concentration 10 mass%) was obtained.
- A solid content 20% by mass
- GBL Mitsubishi Chemical Co., Ltd.
- the glass substrate coated with the mixed solution was placed in a hot air dryer and treated at 60 ° C. for 10 minutes.
- the organic solvent was evaporated by heating at 250 ° C. for 2 hours in a hot air dryer to obtain a polyimide film having a thickness of 1 ⁇ m.
- the polyimide film had a haze value of 1% and a total light transmittance of 95%.
- the mixed solution obtained on a glass plate has self-supporting property by applying the mixed solution obtained on a glass plate and heating it stepwise with a hot air dryer at 50 ° C. ⁇ 5 minutes, 80 ° C. ⁇ 5 minutes, 135 ° C. ⁇ 5 minutes.
- a primary dry film was obtained, and the film was further fixed to a stainless frame, and heated in a hot air dryer at 250 ° C. for 2 hours to evaporate the organic solvent, thereby obtaining a polyimide film having a thickness of 20 ⁇ m.
- the refractive index of the polyimide film was 1.86.
- Example 7 Similar to the one used in Example 1, a polyimide resin synthesized in Synthesis Example 2 was added to a 300 ml four-necked round bottom flask equipped with a stainless half-moon stirring blade, a nitrogen inlet tube, a thermometer, and a glass end cap. 50 g of solution (B) (solid content 20% by mass) and 50 g of GBL (manufactured by Mitsubishi Chemical Corporation) were added, and the system temperature was 40 ° C. and stirred at a rotation speed of 200 rpm in a nitrogen atmosphere, and diluted polyimide resin solution (B ′) (Solid content concentration 10 mass%) was obtained.
- B solid content 20% by mass
- GBL manufactured by Mitsubishi Chemical Corporation
- the glass substrate coated with the mixed solution was placed in a hot air dryer and treated at 60 ° C. for 10 minutes.
- the organic solvent was evaporated by heating at 250 ° C. for 2 hours in a hot air dryer to obtain a polyimide film having a thickness of 1 ⁇ m.
- the polyimide film had a haze value of 76% and a total light transmittance of 84%.
- the mixed solution obtained on a glass plate has self-supporting property by applying the mixed solution obtained on a glass plate and heating it stepwise with a hot air dryer at 50 ° C. ⁇ 5 minutes, 80 ° C. ⁇ 5 minutes, 135 ° C. ⁇ 5 minutes.
- a primary dry film was obtained, and the film was further fixed to a stainless frame, and heated in a hot air dryer at 250 ° C. for 2 hours to evaporate the organic solvent, thereby obtaining a polyimide film having a thickness of 20 ⁇ m.
- the refractive index of the polyimide film was 1.85.
- Example 8 Similar to the one used in Example 1, a polyimide resin synthesized in Synthesis Example 3 was added to a 300 ml four-necked round bottom flask equipped with a stainless half-moon stirring blade, a nitrogen inlet tube, a thermometer, and a glass end cap. 50 g of solution (C) (solid content 20% by mass) and 50 g of GBL (manufactured by Mitsubishi Chemical Corporation) were added, and the system temperature was 40 ° C., stirred in a nitrogen atmosphere at a rotation speed of 200 rpm, and diluted polyimide resin solution (C ′) (Solid content concentration 10 mass%) was obtained.
- C solid content 20% by mass
- GBL manufactured by Mitsubishi Chemical Corporation
- the glass substrate coated with the mixed solution was placed in a hot air dryer and treated at 60 ° C. for 10 minutes.
- the organic solvent was evaporated by heating at 250 ° C. for 2 hours in a hot air dryer to obtain a polyimide film having a thickness of 1 ⁇ m.
- the polyimide film had a haze value of 67% and a total light transmittance of 75%.
- the mixed solution obtained on a glass plate has self-supporting property by applying the mixed solution obtained on a glass plate and heating it stepwise with a hot air dryer at 50 ° C. ⁇ 5 minutes, 80 ° C. ⁇ 5 minutes, 135 ° C. ⁇ 5 minutes.
- a primary dry film was obtained, and the film was further fixed to a stainless frame, and heated in a hot air dryer at 250 ° C. for 2 hours to evaporate the organic solvent, thereby obtaining a polyimide film having a thickness of 20 ⁇ m.
- the refractive index of the polyimide film was 1.85.
- Example 9 Similar to the one used in Example 1, a polyimide resin synthesized in Synthesis Example 1 was added to a 300 ml four-necked round bottom flask equipped with a stainless half-moon stirring blade, a nitrogen inlet tube, a thermometer, and a glass end cap. 50 g of solution (A) (solid content 20% by mass) and 50 g of GBL (Mitsubishi Chemical Co., Ltd.) were added, and the system was stirred at a system temperature of 40 ° C. and a nitrogen atmosphere at a rotation speed of 200 rpm, and diluted polyimide resin solution (A ′) (Solid content concentration 10 mass%) was obtained.
- A solid content 20% by mass
- GBL Mitsubishi Chemical Co., Ltd.
- the glass substrate coated with the mixed solution was placed in a hot air dryer and treated at 60 ° C. for 10 minutes.
- the organic solvent was evaporated by heating at 250 ° C. for 2 hours in a hot air dryer to obtain a polyimide film having a thickness of 1 ⁇ m.
- the polyimide film had a haze value of 36% and a total light transmittance of 88%.
- the mixed solution obtained on a glass plate has self-supporting property by applying the mixed solution obtained on a glass plate and heating it stepwise with a hot air dryer at 50 ° C. ⁇ 5 minutes, 80 ° C. ⁇ 5 minutes, 135 ° C. ⁇ 5 minutes.
- a primary dry film was obtained, and the film was further fixed to a stainless frame, and heated in a hot air dryer at 250 ° C. for 2 hours to evaporate the organic solvent, thereby obtaining a polyimide film having a thickness of 20 ⁇ m.
- the refractive index of the polyimide film was 1.85.
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Abstract
Description
[1] 下記一般式(1)で表される構造単位を有する脂環式ポリイミド樹脂と、二酸化チタン、チタン酸バリウム、及び酸化ジルコニウムから選ばれる少なくとも1つの無機粒子とを含み、前記脂環式ポリイミド樹脂のガラス転移温度が260℃以上であるポリイミド樹脂組成物。
本発明のポリイミド樹脂組成物は、下記一般式(1)で表される構造単位を有する脂環式ポリイミド樹脂と、二酸化チタン、チタン酸バリウム、及び酸化ジルコニウムから選ばれる少なくとも1つの無機粒子とを含み、前記脂環式ポリイミド樹脂のガラス転移温度が260℃以上であるポリイミド樹脂組成物である。
なお、ポリイミド樹脂の透明性の観点から、R1は脂環式炭化水素構造のみで構成されることが好ましい。
なお、5-アミノ-1,3,3-トリメチル-1-(4-アミノフェニル)-インダン(以下、「5-アミノ体」ということがある)、及び6-アミノ-1,3,3-トリメチル-1-(4-アミノフェニル)-インダン(以下、「6-アミノ体」ということがある)は、これらの異性体が混在している場合がある、すなわち、アミノ-1,3,3-トリメチル-1-(4-アミノフェニル)-インダンとして使用する場合は、5-アミノ体及び6-アミノ体が混在していることがある。
本発明のポリイミド樹脂組成物は、二酸化チタン、チタン酸バリウム、及び酸化ジルコニウムから選ばれる少なくとも1つの無機粒子を2~80質量%含有することが好ましく、3~65質量%含有することがより好ましく、7~12質量%含有することがさらに好ましい。
また、前記脂環式ポリイミド樹脂と前記無機粒子の合計量に対する前記無機粒子の割合は、屈折率の観点から、40~80質量%であることが好ましく、50~70質量%であることがより好ましく、55~65質量%であることがさらに好ましい。
本発明のポリイミド樹脂組成物の製造方法は、既述の一般式(1)で表される構造単位を有する脂環式ポリイミド樹脂を含むポリイミド樹脂溶液(以後、「ポリイミド樹脂溶液(X)」と呼称することがある)と、二酸化チタン、チタン酸バリウム、及び酸化ジルコニウムから選ばれる少なくとも1つの無機粒子を含む無機粒子分散液(以後、「無機粒子分散液(Y)」と呼称することがある)とを混合する工程を含む。そして、無機粒子分散液(Y)として、固形分濃度が10~50質量%の分散液を使用する。
したがって、ポリイミド樹脂溶液(X)の溶媒には、脂環式ポリイミド樹脂の合成時に使用される有機溶媒と、必要により脂環式ポリイミド樹脂溶液に添加される有機溶媒と、が含まれる。
無機粒子分散液(Y)の固形分濃度は、10~50質量%であり、10~40質量%であることが好ましく、10~30質量%であることがより好ましく、10~20質量%であることがさらに好ましい。固形分濃度が10質量%未満では、生産性を低下させてしまう。固形分濃度が50質量%を超えると分散が困難になり沈降が生じやすくなる。
二酸化チタンのチタン源としては、二酸化チタン粉末、チタンアルコキシド、チタンアセチルアセテート、四塩化チタン、硫酸チタン等が挙げられる。
有機酸としては、例えばメタノール、エタノール、2-プロパノール、n-ブタノール、2-ブタノール、酢酸エチル、アセトン、メチルエチルケトン、メチルイソブチルケトン等が挙げられるが、特に限定されない。
本発明のポリイミド樹脂組成物は、様々の用途に使用できるが、有機溶剤を除去して得たポリイミドフィルムとして機能を十分に発揮する。このようなポリイミドフィルムは、ポリイミド樹脂を含むポリイミド樹脂組成物の溶液をガラス板、金属板、プラスチックスフィルム等の平滑な支持体上にキャストし、加熱して有機溶剤成分を蒸発させることにより製造できる。すなわち、本発明のポリイミド樹脂組成物の硬化物として、本発明のポリイミドフィルムが得られる。
高屈折率の観点から、屈折率nD(波長589.3nmの屈折率)は1.65以上であることが好ましい。脂環式ポリイミド樹脂の屈折率はおおむね1.53~1.65の範囲であることから、二酸化チタン微粒子による複合効果としては、屈折率nDは1.65以上であることが好ましく、1.7以上であることがより好ましく、1.8以上であることがさらに好ましい。
脂環式ポリイミド樹脂の合成及び二酸化チタン分散液の調製、ポリイミド樹脂組成物の性能の評価は以下の方法によった。
ポリイミド樹脂組成物から得られたポリイミドフィルムの全光線透過率及びヘイズの測定はJIS K7105に準拠し、日本電色工業株式会社製の色彩・濁度同時測定器(COH400)を用いて行った。
エスアイアイ・ナノテクノロジー株式会社製の示差走査熱量計装置(DSC6200)を用い、昇温速度10℃/minの条件で、合成した脂環式ポリイミド樹脂のDSC測定を行い、ガラス転移温度を求めた。
脂環式ポリイミド樹脂溶液及び二酸化チタン分散液の固形分濃度の測定は、アズワン株式会社製の小型電気炉MMF―1で試料を300℃×30minで加熱し、加熱前後の試料質量差から算出した。
ポリイミド樹脂組成物から得られたポリイミドフィルムのフィルム厚さの測定は、厚みが10μm以上の場合は、株式会社ミツトヨ製、マイクロメーターを用いて測定した。厚みが10μm未満の場合は、株式会社キーエンス製カラー3Dレーザ顕微鏡VX-8710により算出した。
ポリイミド樹脂組成物から得られた厚み20μmのポリイミドフィルムの屈折率の測定は、株式会社アタゴ製のアッベ屈折計DR-M4/1550を用いて、D線:589nm、温度:23℃で測定した。なお、D線で測定した屈折率をnDと記載する。
ステンレス製半月型撹拌翼、窒素導入管、冷却管を取り付けたディーンスターク、温度計、ガラス製エンドキャップを備えた300mLの5つ口丸底フラスコに、ジアミン成分として1,4-ビス(4-アミノ-α,α-ジメチルベンジル)ベンゼン(三井化学ファイン株式会社製)12.75g(0.037モル)及び4,4’-ビス(4-アミノフェノキシ)ビフェニル(和歌山精化工業株式会社製)13.63g(0.037モル)、有機溶媒としてγ-ブチロラクトン(三菱化学株式会社製)51.56g、イミド化触媒としてトリエチルアミン(関東化学株式会社製)0.374gを投入し、系内温度70℃、窒素雰囲気下、回転数200rpmで撹拌して溶液を得た。これに脂環式テトラカルボン酸成分として1,2,4,5-シクロヘキサンテトラカルボン酸二無水物(三菱ガス化学株式会社製)16.59g(0.074モル)と有機溶媒であるN,N-ジメチルアセトアミド(三菱ガス化学株式会社製)12.89gを一括で添加した後、マントルヒーターで加熱し、約20分かけて反応系内温度を180℃まで上げた。留去される成分を捕集し、回転数を粘度上昇に合わせて調整しつつ、反応系内温度を180℃に保持して5時間還流することでポリイミド溶液を得た。その後、反応系内温度が120℃まで冷却したらN,N-ジメチルアセトアミド(三菱ガス化学株式会社製)96.75gを添加して、さらに約3時間撹拌して均一化し、固形分濃度20質量%のポリイミド樹脂溶液(A)を得た。
合成例1で使用したものと同様の300mLの5つ口丸底フラスコに、ジアミン成分として1,4-ビス(4-アミノ-α,α-ジメチルベンジル)ベンゼン(三井化学ファイン株式会社製)19.05g(0.055モル)、アミノ-1,3,3-トリメチル-1-(4-アミノフェニル)-インダン(日本純良薬品株式会社製、5-アミノ体(47モル%)と6-アミノ体(53モル%)の混合物)6.31g(0.024モル)、有機溶媒としてγ-ブチロラクトン(三菱化学株式会社製)42.12g、イミド化触媒としてトリエチルアミン(関東化学株式会社製)4.0g、1,4-ジアザビシクロ[2.2.2]オクタン(東京化成株式会社製)0.018gを投入し、系内温度70℃、窒素雰囲気下、回転数200rpmで撹拌して溶液を得た。これに脂環式テトラカルボン酸成分として1,2,4,5-シクロヘキサンテトラカルボン酸二無水物(三菱ガス化学株式会社製)17.71g(0.079モル)とγ-ブチロラクトン10.53gを一括で添加した後、マントルヒーターで加熱し、約20分かけて反応系内温度を190℃まで上げた。留去される成分を捕集し、回転数を粘度上昇に合わせて調整しつつ、反応系内温度を190℃に保持して5時間還流することでポリイミド溶液を得た。その後、反応系内温度が120℃まで冷却したらN,N-ジメチルアセトアミド(三菱ガス化学株式会社製)108.26gを添加して、さらに約3時間撹拌して均一化し、固形分濃度20質量%のポリイミド樹脂溶液(B)を得た。
合成例1で使用したものと同様の2Lのガラス製5つ口丸底フラスコに、ジアミン成分として2,2’-ジメチルベンジジン(和歌山精化工業株式会社製)20.04g(0.094モル)及び2,2’-ビス(トリフルオロメチル)ベンジジン(和歌山精化工業株式会社製)7.56g(0.024モル)、有機溶媒としてγ-ブチロラクトン(三菱化学株式会社製)52.85g、イミド化触媒としてトリエチルアミン(関東化学株式会社製)6.00gを投入し、系内温度70℃、窒素雰囲気下、回転数200rpmで撹拌して溶液を得た。これに脂環式テトラカルボン酸成分として1,2,4,5-シクロヘキサンテトラカルボン酸二無水物(三菱ガス化学株式会社製)26.45g(0.118モル)と有機溶媒であるN,N-ジメチルアセトアミド(三菱ガス化学株式会社製)13.26gを一括で添加した後、マントルヒーターで加熱し、約20分かけて反応系内温度を190℃まで上げた。留去される成分を捕集し、回転数を粘度上昇に合わせて調整しつつ、反応系内温度を190℃ に保持して5時間還流することでポリイミド溶液を得た。その後、反応系内温度が120℃まで冷却したらN,N-ジメチルアセトアミド(三菱ガス化学株式会社製)133.13gを添加して、さらに約3時間撹拌して均一化し、固形分濃度20質量%のポリイミド樹脂溶液(C)を得た。
二酸化チタン粉末(S-TAF1500シリーズ(富士チタン工業株式会社製 平均一次粒子径:20~30nm))850g、顔料分散剤(DISPALON:DA325(楠本化成株式会社製))85g、及びGBL(三菱化学株式会社製)3850gを混合した。混合液を、ビーズミル(日本コークス工業株式会社製・MSCミル)を用いて、1時間15分間分散させて、固形分濃度が18質量%の二酸化チタン微粒子分散液1を得た。この分散液の一部を採取して粒子径分布を測定したところ、平均二次粒子径(D50)は152.7nmとなり、十分に均質な分散液が得られたことが確認された。
二酸化チタン粉末(S-TAF1500シリーズ(富士チタン工業株式会社製 平均一次粒子径:20~30nm))850g、顔料分散剤(DISPALON:DA325(楠本化成株式会社製))85g、及びGBL(三菱化学株式会社製)3850gを混合した。混合液を、ビーズミル(日本コークス工業株式会社製・MSCミル)を用いて、11時間分散させて、固形分濃度が18質量%の二酸化チタン微粒子分散液2を得た。この分散液の一部を採取して粒子径分布を測定したところ、平均二次粒子径(D50)は38.9nmとなり、十分に均質な分散液が得られたことが確認された。
二酸化チタン粉末(TTO-55シリーズ(石原産業株式会社製 平均一次粒子径:30~35nm))850g、顔料分散剤(DISPALON:DA325(楠本化成株式会社製))255g、及びGBL(三菱化学株式会社製)3850gを混合した。混合液を、ビーズミル(日本コークス工業株式会社製・MSCミル)を用いて、1時間分散させて、固形分濃度が17質量%の二酸化チタン微粒子分散液3を得た。この分散液の一部を採取して粒子径分布を測定したところ、平均二次粒子径(D50)は153.0nmとなり、十分に均質な分散液が得られたことが確認された。
二酸化チタン粉末(TTO-55シリーズ(石原産業株式会社製 平均一次粒子径:30~35nm))9g、顔料分散剤(DISPALON:DA325(楠本化成株式会社製))2.7g、ジルコニアビーズ(φ0.3mm(株式会社ニッカトー製))50g、及びGBL(三菱化学株式会社製)41gを混合した。混合液を、ペイントシェーカー(レッドデビル社製)を用いて、3時間分散させて、固形分濃度が17質量%の二酸化チタン微粒子分散液4を得た。この分散液の一部を採取して粒子径分布を測定したところ、平均二次粒子径(D50)は155.0nmとなり、十分に均質な分散液が得られたことが確認された。
なお、二酸化チタン分散液5は、二酸化チタン粉末(平均一次粒子径:20~50nm)を固形分濃度が30質量%となるように分散媒(DMAc)中に分散させて調製した。平均二次粒子径(D50)は、150~200nmであった。
また、二酸化チタン分散液6は、二酸化チタン粉末(平均一次粒子径:100nm)を固形分濃度が22.5質量%となるように分散媒(GBL)中に分散させて調製した。平均二次粒子径(D50)は、187nmであった。
さらに、二酸化チタン分散液7は、二酸化チタン粉末(平均一次粒子径:50nm)を固形分濃度が23.3質量%となるように分散媒(GBL)中に分散させて調製した。平均二次粒子径(D50)は、50nmであった。
ステンレス製半月型撹拌翼、窒素導入管、温度計、ガラス製エンドキャップを備えた300mlの4つ口丸底フラスコに、合成例1で合成したポリイミド樹脂溶液(A)(固形分20質量%)50g、GBL(三菱化学株式会社製)50gを投入し、系内温度40℃、窒素雰囲気下、回転数200rpmで撹拌し希釈ポリイミド樹脂溶液(A’)(固形分濃度10質量%)を得た。次に、この希釈ポリイミド樹脂溶液(A’)(固形分濃度10質量%)40gと調製例1で調製した二酸化チタン分散液1(固形分18質量%)33.3gとをT.K.HOMODISPER Model 2.5(プライミクス株式会社製)を用いて、回転数2000rpmで5分間混練した。これにより得られた混合液をガラス基板にスピンコートにより塗布した。
実施例1で使用したものと同様に、ステンレス製半月型撹拌翼、窒素導入管、温度計、ガラス製エンドキャップを備えた300mlの4つ口丸底フラスコに、合成例1で合成したポリイミド樹脂溶液(A)(固形分20質量%)50g、GBL(三菱化学株式会社製)50gを投入し、系内温度40℃、窒素雰囲気下、回転数200rpmで撹拌し希釈ポリイミド樹脂溶液(A’)(固形分濃度10質量%)を得た。次に、この希釈ポリイミド樹脂溶液(A’)(固形分濃度10質量%)40gと調製例2で調製した二酸化チタン分散液2(固形分18質量%)33.3gとをT.K.HOMODISPER Model 2.5(プライミクス株式会社製)を用いて、回転数2000rpmで5分間混練した。これにより得られた混合液をガラス基板にスピンコートにより塗布した。
実施例1で使用したものと同様に、ステンレス製半月型撹拌翼、窒素導入管、温度計、ガラス製エンドキャップを備えた300mlの4つ口丸底フラスコに、合成例1で合成したポリイミド樹脂溶液(A)(固形分20質量%)50g、GBL(三菱化学株式会社製)50gを投入し、系内温度40℃、窒素雰囲気下、回転数200rpmで撹拌し希釈ポリイミド樹脂溶液(A’)(固形分濃度10質量%)を得た。次に、この希釈ポリイミド樹脂溶液(A’)(固形分濃度10質量%)40gと調製例3で調製した二酸化チタン分散液3(固形分17質量%)35.1gとをT.K.HOMODISPER Model 2.5(プライミクス株式会社製)を用いて、回転数2000rpmで5分間混練した。これにより得られた混合液をガラス基板にスピンコートにより塗布した。
実施例1で使用したものと同様に、ステンレス製半月型撹拌翼、窒素導入管、温度計、ガラス製エンドキャップを備えた300mlの4つ口丸底フラスコに、合成例1で合成したポリイミド樹脂溶液(A)(固形分20質量%)50g、GBL(三菱化学株式会社製)50gを投入し、系内温度40℃、窒素雰囲気下、回転数200rpmで撹拌し希釈ポリイミド樹脂溶液(A’)(固形分濃度10質量%)を得た。次に、この希釈ポリイミド樹脂溶液(A’)(固形分濃度10質量%)40gと二酸化チタン分散液5の20gとをT.K.HOMODISPER Model 2.5(プライミクス株式会社製)を用いて、回転数2000rpmで5分間混練した。これにより得られた混合液をガラス基板にスピンコートにより塗布した。
実施例1で使用したものと同様に、ステンレス製半月型撹拌翼、窒素導入管、温度計、ガラス製エンドキャップを備えた300mlの4つ口丸底フラスコに、合成例1で合成したポリイミド樹脂溶液(A)(固形分20質量%)50g、GBL(三菱化学株式会社製)50gを投入し、系内温度40℃、窒素雰囲気下、回転数200rpmで撹拌し希釈ポリイミド樹脂溶液(A’)(固形分濃度10質量%)を得た。次に、この希釈ポリイミド樹脂溶液(A’)(固形分濃度10質量%)40gと二酸化チタン分散液6の20gとをT.K.HOMODISPER Model 2.5(プライミクス株式会社製)を用いて、回転数2000rpmで5分間混練した。これにより得られた混合液をガラス基板にスピンコートにより塗布した。
実施例1で使用したものと同様に、ステンレス製半月型撹拌翼、窒素導入管、温度計、ガラス製エンドキャップを備えた300mlの4つ口丸底フラスコに、合成例1で合成したポリイミド樹脂溶液(A)(固形分20質量%)50g、GBL(三菱化学株式会社製)50gを投入し、系内温度40℃、窒素雰囲気下、回転数200rpmで撹拌し希釈ポリイミド樹脂溶液(A’)(固形分濃度10質量%)を得た。次に、この希釈ポリイミド樹脂溶液(A’)(固形分濃度10質量%)40gと二酸化チタン分散液7の20gとをT.K.HOMODISPER Model 2.5(プライミクス株式会社製)を用いて、回転数2000rpmで5分間混練した。これにより得られた混合液をガラス基板にスピンコートにより塗布した。
実施例1で使用したものと同様に、ステンレス製半月型撹拌翼、窒素導入管、温度計、ガラス製エンドキャップを備えた300mlの4つ口丸底フラスコに、合成例2で合成したポリイミド樹脂溶液(B)(固形分20質量%)50g、GBL(三菱化学株式会社製)50gを投入し、系内温度40℃、窒素雰囲気下、回転数200rpmで撹拌し希釈ポリイミド樹脂溶液(B’)(固形分濃度10質量%)を得た。次に、この希釈ポリイミド樹脂溶液(B’)(固形分濃度10質量%)40gと二酸化チタン分散液3(固形分17質量%)35.1gとをT.K.HOMODISPER Model 2.5(プライミクス株式会社製)を用いて、回転数2000rpmで5分間混練した。これにより得られた混合液をガラス基板にスピンコートにより塗布した。
実施例1で使用したものと同様に、ステンレス製半月型撹拌翼、窒素導入管、温度計、ガラス製エンドキャップを備えた300mlの4つ口丸底フラスコに、合成例3で合成したポリイミド樹脂溶液(C)(固形分20質量%)50g、GBL(三菱化学株式会社製)50gを投入し、系内温度40℃、窒素雰囲気下、回転数200rpmで撹拌し希釈ポリイミド樹脂溶液(C’)(固形分濃度10質量%)を得た。次に、この希釈ポリイミド樹脂溶液(C’)(固形分濃度10質量%)40gと二酸化チタン分散液3(固形分17質量%)35.1gとをT.K.HOMODISPER Model 2.5(プライミクス株式会社製)を用いて、回転数2000rpmで5分間混練した。これにより得られた混合液をガラス基板にスピンコートにより塗布した。
実施例1で使用したものと同様に、ステンレス製半月型撹拌翼、窒素導入管、温度計、ガラス製エンドキャップを備えた300mlの4つ口丸底フラスコに、合成例1で合成したポリイミド樹脂溶液(A)(固形分20質量%)50g、GBL(三菱化学株式会社製)50gを投入し、系内温度40℃、窒素雰囲気下、回転数200rpmで撹拌し希釈ポリイミド樹脂溶液(A’)(固形分濃度10質量%)を得た。次に、この希釈ポリイミド樹脂溶液(A’)(固形分濃度10質量%)40gと調製例4で調製した二酸化チタン分散液4(固形分17質量%)35.1gとをT.K.HOMODISPER Model 2.5(プライミクス株式会社製)を用いて、回転数2000rpmで5分間混練した。これにより得られた混合液をガラス基板にスピンコートにより塗布した。
Claims (9)
- 厚さ1μmのポリイミドフィルムとした際の全光線透過率が75%以上である請求項1記載のポリイミド樹脂組成物。
- 脂環式ポリイミド樹脂のテトラカルボン酸成分が、1,2,3,4-シクロブタンテトラカルボン酸、1,2,4,5-シクロペンタンテトラカルボン酸、1,2,4,5-シクロヘキサンテトラカルボン酸、ビシクロ[2.2.2]オクタ-7-エン-2,3,5,6-テトラカルボン酸、ジシクロヘキシルテトラカルボン酸、及び、これらの位置異性体からなる群より選ばれたテトラカルボン酸に由来する請求項1又は2に記載のポリイミド樹脂組成物。
- 前記脂環式ポリイミド樹脂のジアミン成分が、1,4-ビス(4-アミノ-α,α-ジメチルベンジル)ベンゼン、4,4’-ビス(4-アミノフェノキシ)ビフェニル、5-アミノ-1,3,3-トリメチル-1-(4-アミノフェニル)-インダン、6-アミノ-1,3,3-トリメチル-1-(4-アミノフェニル)-インダン、2,2’-ジメチルベンジジン、2,2’-ビス(トリフルオロメチル)ベンジジンからなる群より選ばれたジアミンに由来する請求項1~4のいずれか1項に記載のポリイミド樹脂組成物。
- 前記ポリイミド樹脂溶液の溶媒が、N-メチル-2-ピロリドン、N,N-ジメチルアセトアミド、γ-ブチロラクトン、N,N-ジメチルホルムアミド、ジメチルスルホキシド、ヘキサメチルホスホルアミド、テトラメチレンスルホン、p-クロロフェノール、m-クレゾール、2-クロロ-4-ヒドロキシトルエン、1,3-ジオキソランより選ばれる1種以上である請求項6に記載のポリイミド樹脂組成物の製造方法。
- 前記無機粒子分散液の分散媒が、N,N-ジメチルアセトアミド、N,N-ジメチルホルムアミド、N,N,2-トリメチルプロピオンアミド、γ-ブチロラクトン、ジメチルスルホキシド、シクロペンタノン、プロピレングリコールモノメチルエーテル、プロピレングリコールモノメチルエーテルアセテートより選ばれるいずれかを含み、前記分散液中の前記分散媒の割合が60質量%以上である請求項6又は7に記載のポリイミド樹脂組成物の製造方法。
- 請求項1~5のいずれか1項に記載のポリイミド樹脂組成物の硬化物からなるポリイミドフィルム。
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| US16/087,363 US10954339B2 (en) | 2016-04-05 | 2017-03-31 | Polyimide resin composition, method for producing same, and polyimide film |
| EP17779058.1A EP3441428B1 (en) | 2016-04-05 | 2017-03-31 | Polyimide resin composition, method for producing same, and polyimide film |
| CN201780018551.2A CN108884317B (zh) | 2016-04-05 | 2017-03-31 | 聚酰亚胺树脂组合物和其制造方法、以及聚酰亚胺薄膜 |
| KR1020187027778A KR102310747B1 (ko) | 2016-04-05 | 2017-03-31 | 폴리이미드 수지 조성물 및 그 제조방법, 그리고 폴리이미드 필름 |
| JP2018510577A JP6930530B2 (ja) | 2016-04-05 | 2017-03-31 | ポリイミド樹脂組成物及びその製造方法、並びにポリイミドフィルム |
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| KR20190064201A (ko) * | 2017-11-30 | 2019-06-10 | 코오롱인더스트리 주식회사 | 폴리이미드 수지 조성물, 이로부터 제조된 폴리이미드 필름, 이의 제조방법 및 이를 포함하는 영상표시 소자 |
| WO2024004602A1 (ja) * | 2022-06-28 | 2024-01-04 | 三菱瓦斯化学株式会社 | 熱可塑性樹脂組成物、成形体、及び、検査用icソケットの構成部材 |
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| WO2020150913A1 (zh) * | 2019-01-23 | 2020-07-30 | 律胜科技股份有限公司 | 感光性聚酰亚胺树脂组合物及其聚酰亚胺膜 |
| WO2021167000A1 (ja) * | 2020-02-21 | 2021-08-26 | 三菱瓦斯化学株式会社 | ポリイミドフィルムの製造方法 |
| US20240027907A1 (en) * | 2020-12-02 | 2024-01-25 | Mitsubishi Gas Chemical Company, Inc. | Method for producing patterned substrate |
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| EP3441428A1 (en) | 2019-02-13 |
| JP6930530B2 (ja) | 2021-09-01 |
| US10954339B2 (en) | 2021-03-23 |
| CN108884317B (zh) | 2021-08-20 |
| TW201742892A (zh) | 2017-12-16 |
| CN108884317A (zh) | 2018-11-23 |
| JPWO2017175679A1 (ja) | 2019-02-14 |
| KR20180124890A (ko) | 2018-11-21 |
| US20200002477A1 (en) | 2020-01-02 |
| EP3441428C0 (en) | 2024-03-13 |
| EP3441428B1 (en) | 2024-03-13 |
| KR102310747B1 (ko) | 2021-10-12 |
| EP3441428A4 (en) | 2019-04-17 |
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