WO2015080158A1 - ポリイミド前駆体組成物、ポリイミドの製造方法、ポリイミド、ポリイミドフィルム、及び基板 - Google Patents
ポリイミド前駆体組成物、ポリイミドの製造方法、ポリイミド、ポリイミドフィルム、及び基板 Download PDFInfo
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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
- C08G73/1003—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
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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
- C08G73/1082—Partially aromatic polyimides wholly aromatic in the tetracarboxylic moiety
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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
- C08G73/14—Polyamide-imides
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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
- 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
- C08K5/00—Use of organic ingredients
- C08K5/16—Nitrogen-containing compounds
- C08K5/34—Heterocyclic compounds having nitrogen in the ring
- C08K5/3442—Heterocyclic compounds having nitrogen in the ring having two nitrogen atoms in the ring
- C08K5/3445—Five-membered rings
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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
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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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
- C08L2203/00—Applications
- C08L2203/20—Applications use in electrical or conductive gadgets
Definitions
- the present invention provides a solution composition (polyimide precursor composition) containing a polyimide precursor that provides a polyimide having a small thickness direction retardation (retardation), excellent mechanical properties, and excellent transparency. It relates to a manufacturing method.
- the present invention also relates to a polyimide, a polyimide film, and a substrate that are excellent in transparency, have a small thickness direction retardation, and are excellent in mechanical properties.
- Aromatic polyimide is essentially yellowish brown due to intramolecular conjugation and the formation of charge transfer complexes. For this reason, as a means to suppress coloration, for example, introduction of fluorine atoms into the molecule, imparting flexibility to the main chain, introduction of bulky groups as side chains, etc. inhibits intramolecular conjugation and charge transfer complex formation. Thus, a method for expressing transparency has been proposed.
- Patent Documents 1 to 3 disclose highly translucent semi-alicyclic polyimides using aromatic tetracarboxylic dianhydride as a tetracarboxylic acid component and alicyclic diamine as a diamine component.
- Patent Documents 4 to 7 disclose various highly translucent semi-alicyclic polyimides using an alicyclic tetracarboxylic dianhydride as a tetracarboxylic acid component and an aromatic diamine as a diamine component. Has been.
- Non-Patent Document 1 discloses, as a tetracarboxylic acid component, norbornane-2-spiro- ⁇ -cyclopentanone- ⁇ ′-spiro-2 ′′ -norbornane-5,5 ′′, 6,6 ′′ -tetracarboxylic acid. Polyimides using acid dianhydrides are disclosed. Further, norbornane-2-spiro- ⁇ -cyclopentanone- ⁇ ′-spiro-2 ′′ -norbornane-5,5 ′′, 6,6 ′′ -tetracarboxylic dianhydride used here is 6 It is described that it contains various stereoisomers.
- Patent Document 8 also discloses norbornane-2-spiro- ⁇ -cyclopentanone- ⁇ ′-spiro-2 ′′ -norbornane-5,5 ′′, 6,6 ′′ -tetracarboxylic acid as a tetracarboxylic acid component.
- Polyimides using dianhydrides are disclosed.
- Patent Document 9 discloses a polyimide formed by heating a coating solution obtained by blending a polyimide precursor (polyamic acid) with an imidazoline compound and / or an imidazole compound. More specifically, in Example 1, 2,4-dimethyl was added to a polyamic acid solution obtained from 3,3 ′, 4,4′-benzophenonetetracarboxylic dianhydride and 4,4′-diaminobiphenyl ether. A solution to which imidazoline has been added is applied onto a substrate and heated at 200 ° C. for 1 hour to obtain an aromatic polyimide film having a thickness of 1000 mm (0.1 ⁇ m).
- Example 2 a solution obtained by adding 2-ethylimidazoline and 1,2-dimethylimidazole to a solution of polyamic acid obtained from pyromellitic dianhydride and 4,4′-diaminobiphenyl ether was applied onto a substrate.
- An aromatic polyimide film having a thickness of 800 mm (0.08 ⁇ m) is obtained by heating at 150 ° C. for 1 hour.
- Patent Document 9 by adding an imidazoline-based compound and / or an imidazole-based compound, the remarkable brown coloration is avoided, and a liquid crystal display element with high light transmittance and excellent transparency can be obtained. It is described.
- the light transmittance at a wavelength of 400 nm of the liquid crystal display element using the polyimide film (liquid crystal alignment film) of Example 1 is 82% (polyimide film thickness: 0.1 ⁇ m), and the polyimide film of Example 2 (liquid crystal alignment film).
- the light transmittance at a wavelength of 400 nm of the liquid crystal display element using the above is 83% (polyimide film thickness: 0.08 ⁇ m), and this polyimide does not have sufficient transparency.
- Patent Document 10 discloses a polyimide precursor resin and a curing accelerator for a polyimide precursor resin such as imidazole and N-methylimidazole dissolved in an organic polar solvent.
- a method for forming a polyimide resin layer is disclosed, in which a polyimide precursor resin-containing solution is applied onto a substrate, followed by drying and imidization to complete the formation of a polyimide resin layer within a range of 280 to 380 ° C., It is described that the thermal expansion coefficient can be controlled to be low by using these curing accelerators.
- Patent Document 10 also describes that a curing accelerator having a boiling point exceeding 120 ° C.
- a boiling point not exceeding the upper limit temperature of heat treatment is preferably selected.
- a curing accelerator having a boiling point of, for example, 400 ° C. or higher has a higher ratio of remaining in the polyimide resin layer after imidization and tends to affect the function of the polyimide resin layer.
- the present invention has been made in view of the situation as described above, and is a polyimide having excellent transparency and having a smaller thickness direction retardation even with the same composition, or a thickness direction retardation being small and mechanical. It aims at providing the manufacturing method of the polyimide precursor composition (solution composition containing a polyimide precursor) from which the polyimide excellent also in the characteristic and also excellent in transparency is obtained, and a polyimide.
- the present invention relates to the following items.
- X 1 is a tetravalent group having an alicyclic structure
- Y 1 is a divalent group having an aromatic ring
- R 1 and R 2 are each independently hydrogen, C 1-6 Or an alkylsilyl group having 3 to 9 carbon atoms.
- X 2 is a tetravalent group having an aromatic ring
- Y 2 is a divalent group having an alicyclic structure
- R 3 and R 4 are each independently hydrogen, 1 to 6 carbon atoms; Or an alkylsilyl group having 3 to 9 carbon atoms.
- Item 2 The polyimide precursor composition according to item 1, wherein the polyimide obtained from the polyimide precursor composition has a light transmittance at a wavelength of 400 nm of a film having a thickness of 10 ⁇ m of 75% or more. 3. Item 3. The polyimide precursor composition according to item 1 or 2, wherein the content of the imidazole compound is 0.05 mol to 2 mol with respect to 1 mol of the repeating unit of the polyimide precursor. 4). Item 4. The polyimide precursor composition according to any one of Items 1 to 3, wherein the imidazole compound has a boiling point at 1 atm of less than 340 ° C. 5.
- any one of Items 1 to 4 wherein the imidazole compound is any one of 1,2-dimethylimidazole, 1-methylimidazole, 2-methylimidazole, 2-phenylimidazole, imidazole, and benzimidazole.
- a polyimide having excellent transparency and having a small thickness direction retardation even in the same composition or a polyimide having a small thickness direction retardation, excellent mechanical properties, and excellent transparency.
- the obtained polyimide precursor composition solution composition containing a polyimide precursor
- a method for producing polyimide can be provided.
- the polyimide obtained from the polyimide precursor composition of the present invention is highly transparent and has a small thickness direction retardation, and has a low linear thermal expansion coefficient, facilitating the formation of fine circuits. And can be suitably used to form a substrate for display applications and the like. Moreover, the polyimide of this invention can be used suitably also in order to form the board
- the polyimide precursor composition of the present invention includes a polyimide precursor containing at least one of the repeating unit represented by the chemical formula (1) or the repeating unit represented by the chemical formula (2), and an imidazole compound.
- the content of the imidazole compound is less than 4 mol with respect to 1 mol of the repeating unit of the polyimide precursor.
- the polyimide obtained from the polyimide precursor containing the repeating unit represented by the chemical formula (1) or the repeating unit represented by the chemical formula (2), that is, a semi-alicyclic polyimide has high transparency. .
- the use of additives that can cause coloring is not preferred.
- the imidazole compound to the polyimide precursor composition at a ratio of less than 4 mol, preferably 0.05 mol or more and 2 mol or less, with respect to 1 mol of the repeating unit of the polyimide precursor, high transparency is achieved.
- a polyimide having a small thickness direction retardation can be obtained while keeping it.
- a polyimide having a smaller thickness direction retardation can be obtained from a polyimide precursor having the same composition while maintaining high transparency.
- an imidazole compound having a boiling point of less than 340 ° C. at 1 atmosphere is used, the transparency of the resulting polyimide may be further improved.
- the polyimide precursor is imidized by heat treatment at a temperature exceeding 350 ° C., particularly preferably exceeding 400 ° C.
- a highly transparent polyimide can be produced.
- the maximum heating temperature of the heat treatment for imidization can be set to a high temperature exceeding 350 ° C., particularly preferably a high temperature exceeding 400 ° C., so that the mechanical properties of the resulting polyimide are improved. That is, according to the present invention, a polyimide having high transparency, small thickness direction retardation, and excellent mechanical properties can be obtained.
- the polyimide precursor composition of the present invention includes a polyimide precursor containing at least one of the repeating unit represented by the chemical formula (1) or the repeating unit represented by the chemical formula (2).
- X 1 in the chemical formula (1) is preferably a tetravalent group having an alicyclic structure having 4 to 40 carbon atoms, and Y 1 is a divalent having an aromatic ring having 6 to 40 carbon atoms. Are preferred.
- Examples of the tetracarboxylic acid component that gives the repeating unit of the chemical formula (1) include 1,2,3,4-cyclobutanetetracarboxylic acid, isopropylidenediphenoxybisphthalic acid, cyclohexane-1,2,4,5- Tetracarboxylic acid, [1,1′-bi (cyclohexane)]-3,3 ′, 4,4′-tetracarboxylic acid, [1,1′-bi (cyclohexane)]-2,3,3 ′, 4 '-Tetracarboxylic acid, [1,1'-bi (cyclohexane)]-2,2', 3,3'-tetracarboxylic acid, 4,4'-methylenebis (cyclohexane-1,2-dicarboxylic acid), 4 , 4 '-(propane-2,2-diyl) bis (cyclohexane-1,2-dicarboxylic acid), 4,4'-oxybis (cyclohex
- Examples of the diamine component that gives the repeating unit of the chemical formula (1) include p-phenylenediamine, m-phenylenediamine, benzidine, 3,3′-diamino-biphenyl, and 2,2′-bis (trifluoromethyl) benzidine.
- the polyimide precursor containing at least one repeating unit represented by the chemical formula (1) can contain other repeating units other than the repeating unit represented by the chemical formula (1).
- the tetracarboxylic acid component and diamine component that give other repeating units are not particularly limited, and any other known aromatic or aliphatic tetracarboxylic acids or known aromatic or aliphatic diamines can be used. .
- Other tetracarboxylic acid components may be used alone or in combination of two or more.
- Other diamine components may be used alone or in combination of two or more.
- the content of other repeating units other than the repeating unit represented by the chemical formula (1) is preferably 30 mol% or less or less than 30 mol%, more preferably 20 mol% or less, based on all repeating units. More preferably, it is 10 mol% or less.
- X 2 in the chemical formula (2) is preferably a tetravalent group having an aromatic ring having 6 to 40 carbon atoms
- Y 2 is a divalent having an alicyclic structure having 4 to 40 carbon atoms.
- tetracarboxylic acid component giving the repeating unit of the chemical formula (2) examples include 2,2-bis (3,4-dicarboxyphenyl) hexafluoropropane, 4- (2,5-dioxotetrahydrofuran-3- Yl) -1,2,3,4-tetrahydronaphthalene-1,2-dicarboxylic acid, pyromellitic acid, 3,3 ′, 4,4′-benzophenone tetracarboxylic acid, 3,3 ′, 4,4′- Biphenyltetracarboxylic acid, 2,3,3 ′, 4′-biphenyltetracarboxylic acid, 4,4′-oxydiphthalic acid, bis (3,4-dicarboxyphenyl) sulfone dianhydride, m-terphenyl-3, 4,3 ′, 4′-tetracarboxylic dianhydride, p-terphenyl-3,4,3 ′, 4′-
- Examples of the diamine component that gives the repeating unit of the chemical formula (2) include 1,4-diaminocyclohexane, 1,4-diamino-2-methylcyclohexane, 1,4-diamino-2-ethylcyclohexane, 1, 4-diamino-2-n-propylcyclohexane, 1,4-diamino-2-isopropylcyclohexane, 1,4-diamino-2-n-butylcyclohexane, 1,4-diamino-2-isobutylcyclohexane, 1,4- Diamino-2-sec-butylcyclohexane, 1,4-diamino-2-tert-butylcyclohexane, 1,2-diaminocyclohexane, 1,3-diaminocyclobutane, 1,4-bis (aminomethyl) cyclohexane, 1 , 3-Bis
- the polyimide precursor containing at least one type of repeating unit represented by the chemical formula (2) may contain other repeating units other than the repeating unit represented by the chemical formula (2).
- the tetracarboxylic acid component and diamine component that give other repeating units are not particularly limited, and any other known aromatic or aliphatic tetracarboxylic acids or known aromatic or aliphatic diamines can be used. .
- Other tetracarboxylic acid components may be used alone or in combination of two or more.
- Other diamine components may be used alone or in combination of two or more.
- the content of other repeating units other than the repeating unit represented by the chemical formula (2) is preferably 30 mol% or less or less than 30 mol%, more preferably 20 mol% or less, based on all repeating units. More preferably, it is 10 mol% or less.
- the polyimide precursor may include at least one repeating unit represented by the chemical formula (1) and at least one repeating unit represented by the chemical formula (2). Also in that case, the content of other repeating units other than the repeating units represented by the chemical formulas (1) and (2) is preferably 30 mol% or less or less than 30 mol% with respect to all repeating units. More preferably, it is 20 mol% or less, More preferably, it is 10 mol% or less.
- a polyimide precursor containing a repeating unit represented by the following chemical formula (1-1) is preferable, and the following chemical formula (1-2) and the following chemical formula (1-3)
- the total content of the repeating units represented by the chemical formula (1-2) and the chemical formula (1-3) is 80 mol% or more based on the total repeating units.
- a polyimide precursor is more preferable.
- A is a divalent group having an aromatic ring
- R 1 and R 2 are each independently hydrogen, an alkyl group having 1 to 6 carbon atoms, or an alkylsilyl group having 3 to 9 carbon atoms. .
- A is a divalent group having an aromatic ring
- R 1 and R 2 are each independently hydrogen, an alkyl group having 1 to 6 carbon atoms, or an alkylsilyl group having 3 to 9 carbon atoms. .
- A is a divalent group having an aromatic ring
- R 1 and R 2 are each independently hydrogen, an alkyl group having 1 to 6 carbon atoms, or an alkylsilyl group having 3 to 9 carbon atoms. .
- the chemical formula (1-1), the chemical formula (1-2), and the chemical formula (1-3) are either the 5-position or the 6-position of two norbornane rings (bicyclo [2.2.1] heptane).
- the polyimide precursor is a repeating unit represented by the chemical formula (1-1) in which A is a group represented by the following chemical formula (1-A), more preferably A is represented by the following chemical formula (1-A). It is preferable that at least one repeating unit represented by the chemical formula (1-2) and / or the chemical formula (1-3), which is a group to be formed, is included.
- m is an integer of 0 to 3
- n is an integer of 0 to 3.
- V, U, and T is independently selected from the group consisting of a hydrogen atom, a methyl group, and a trifluoromethyl group.
- Z and W are each independently a direct bond, or one selected from the group consisting of groups represented by the formula: —NHCO—, —CONH—, —COO—, —OCO— Show.
- the polyimide precursor is norbornane-2-spiro- ⁇ -cyclopentanone- ⁇ ′-spiro-2 ′′ -norbornane-5,5 ′′, 6,6 ′′- Tetracarboxylic acids and the like, more preferably trans-endo-endo-norbornane-2-spiro- ⁇ -cyclopentanone- ⁇ '-spiro-2 ′′ -norbornane-5,5 ′′, 6,6 ′′ -tetra Carboxylic acids and / or cis-endo-endo-norbornane-2-spiro- ⁇ -cyclopentanone- ⁇ ′-spiro-2 ′′ -norbornane-5,5 ′′, 6,6 ′′ -tetracarboxylic acids (Tetracarboxylic acids, etc.
- tetracarboxylic acids are tetracarboxylic acids, tetracarboxylic dianhydrides, tetracarboxylic silyl esters, tetracarboxylic acid esters, tetra A tetracarboxylic acid component containing a tetracarboxylic acid derivative such as rubonic acid chloride) and a diamine component having an aromatic ring, more preferably a chemical formula (1) wherein A is a group represented by the chemical formula (1-A) -1), a polyimide precursor obtained from a diamine component containing a diamine component giving a repeating unit of the chemical formula (1-2) or the chemical formula (1-3).
- Examples of the tetracarboxylic acid component that gives the repeating unit of the chemical formula (1-1) include norbornane-2-spiro- ⁇ -cyclopentanone- ⁇ ′-spiro-2 ′′ -norbornane-5,5 ′′, 6,
- One kind such as 6 ′′ -tetracarboxylic acid may be used alone, or a plurality of kinds may be used in combination.
- Examples of the tetracarboxylic acid component that gives the repeating unit of the chemical formula (1-2) include trans-endo-endo-norbornane-2-spiro- ⁇ -cyclopentanone- ⁇ ′-spiro-2 ′′ -norbornane-5, One type such as 5 ′′, 6,6 ′′ -tetracarboxylic acid may be used alone, or a plurality of types may be used in combination.
- Examples of the tetracarboxylic acid component that gives the repeating unit of the chemical formula (1-3) include cis-endo-endo-norbornane-2-spiro- ⁇ -cyclopentanone- ⁇ ′-spiro-2 ′′ -norbornane-5, One type such as 5 ′′, 6,6 ′′ -tetracarboxylic acid may be used alone, or a plurality of types may be used in combination.
- a tetracarboxylic acid component (trans-endo-endo-norbornane-2-spiro- ⁇ -cyclopentanone- ⁇ ′-) that gives the repeating unit of the chemical formula (1-2) is used.
- spiro-2 ′′ -norbornane-5,5 ′′, 6,6 ′′ -tetracarboxylic acids, etc. may be used, and a tetra unit giving a repeating unit of the above chemical formula (1-3)
- Carboxylic acid component cis-endo-endo-norbornane-2-spiro- ⁇ -cyclopentanone- ⁇ ′-spiro-2 ′′ -norbornane-5,5 ′′, 6,6 ′′ -tetracarboxylic acids, etc.
- a tetracarboxylic acid component trans-endo-endo-norvo
- nan-2-spiro- ⁇ -cyclopentanone- ⁇ ′-spiro-2 ′′ -norbornane-5,5 ′′, 6,6 ′′ -tetracarboxylic acid, etc. and the above chemical formula (1 -3) a tetracarboxylic acid component (cis-endo-endo-norbornane-2-spiro- ⁇ -cyclopentanone- ⁇ ′-spiro-2 ′′ -norbornane-5,5 ′′, 6
- 6 ′′ -tetracarboxylic acids and the like may be used.
- the polyimide precursor preferably has a total content of the repeating units represented by the chemical formulas (1-2) and (1-3) of 80 mol% or more based on the total repeating units, In addition, at least one repeating unit represented by the chemical formula (1-2) and the chemical formula (1-3) is included, and the total of the repeating units in all repeating units is preferably 80 mol% or more, more preferably Is preferably 90 mol% or more, more preferably 95 mol% or more, particularly preferably 99 mol% or more. Including at least one repeating unit represented by the chemical formula (1-2) and the chemical formula (1-3), and including the repeating unit in all repeating units in total, preferably 80 mol% or more, The resulting linear thermal expansion coefficient of the polyimide is reduced.
- the diamine component giving the repeating unit of the chemical formula (1-1), the chemical formula (1-2), or the chemical formula (1-3) is one in which A is a group represented by the chemical formula (1-A) It is preferred to include a diamine that provides
- the aromatic rings are each independently linked by a direct bond, an amide bond, or an ester bond.
- the connection position of the aromatic rings is not particularly limited, but it may form a linear structure by bonding at the 4-position to the amino group or the connection group of the aromatic rings, and the resulting polyimide may have low linear thermal expansion.
- a methyl group or a trifluoromethyl group may be substituted on the aromatic ring.
- the substitution position is not particularly limited.
- the diamine component that gives the repeating unit of the chemical formula (1-1), the chemical formula (1-2), or the chemical formula (1-3) in which A is the structure of the chemical formula (1-A) is not particularly limited.
- the resulting polyimide has both high heat resistance and high transmittance.
- these diamines may be used alone or in combination of two or more. Note that o-tolidine is not preferred because of its high risk.
- diamine component that gives the repeating unit of the chemical formula (1-1), the chemical formula (1-2), or the chemical formula (1-3) a diamine that gives the structure of the chemical formula (1-A)
- diamines other than the components can be used in combination.
- Other aromatic or aliphatic diamines can be used as other diamine components.
- Examples of other diamine components include 4,4′-oxydianiline, 3,4′-oxydianiline, 3,3′-oxydianiline, bis (4-aminophenyl) sulfide, p-methylenebis (phenylenediamine) ), 1,3-bis (4-aminophenoxy) benzene, 1,3-bis (3-aminophenoxy) benzene, 1,4-bis (4-aminophenoxy) benzene, 2,2-bis [4- ( 4-aminophenoxy) phenyl] hexafluoropropane, 2,2-bis (4-aminophenyl) hexafluoropropane, bis (4-aminophenyl) sulfone, 3,3-bis ((aminophenoxy) phenyl) propane, 2 , 2-bis (3-amino-4-hydroxyphenyl) hexafluoropropane, bis (4- (4-aminophenoxy) diph Enyl) sulf
- the polyimide precursor of the present invention has at least one repeating unit represented by the chemical formula (1-1) in which A is represented by the chemical formula (1-A), more preferably, A represents the chemical formula (1-A). At least one repeating unit of the chemical formula (1-2) represented by A) and / or A of the chemical formula (1-3) wherein A is represented by the chemical formula (1-A) It is preferable to include at least one repeating unit.
- the diamine component that gives the repeating unit of the chemical formula (1-1), more preferably the repeating unit of the chemical formula (1-2) and the chemical formula (1-3), is represented by A being the chemical formula (1-A).
- a diamine component that gives a structure of The repeating unit of the chemical formula (1-1), more preferably the diamine component giving A in the chemical formula (1-2) and the chemical formula (1-3) gives the structure of the chemical formula (1-A)
- the heat resistance of the resulting polyimide is improved.
- the polyimide precursor of the present invention contains the chemical formula (1-A) in 100 mol% of the diamine component that gives A in the chemical formula (1-1) or the chemical formula (1-2) and the chemical formula (1-3).
- the ratio of the diamine components that give the structure is preferably 50 mol% or more, more preferably 70 mol% or more, more preferably 80 mol% or more, still more preferably 90 mol% or more, and particularly preferably 100 mol%. % Is preferred.
- the chemical formula (1-1) in which A is the structure of the chemical formula (1-A), or the proportion of one or more repeating units of the chemical formula (1-2) and the chemical formula (1-3) are, in total, preferably 50 mol% or more, more preferably 70 mol in all repeating units represented by the chemical formula (1-1) or the chemical formula (1-2) and the chemical formula (1-3). % Or more, more preferably 80 mol% or more, still more preferably 90 mol% or more, particularly preferably 100 mol%.
- the proportion of the diamine component giving the structure of the chemical formula (1-A) is less than 50 mol%, the resulting polyimide may have a large linear thermal expansion coefficient.
- % of the diamine component giving the structure of the chemical formula (1-A) is preferably 80 mol% or less, more preferably 90 mol% or less or less than 90 mol% in total.
- other aromatic or aliphatic diamines such as 4,4′-oxydianiline are substituted with the chemical formula (1-1) or the repeating units of the chemical formula (1-2) and the chemical formula (1-3).
- 100 mol% of the diamine component that gives the above preferably less than 20 mol%, more preferably 10 mol% or less, more preferably less than 10 mol%.
- the polyimide precursor containing the repeating unit represented by the chemical formula (1-1) of the present invention has a chemical formula (1-1) in which A is represented by the chemical formula (1-A). It may be preferred to include at least two types of repeating units. In one embodiment, the polyimide precursor containing the repeating unit represented by the chemical formula (1-2) and / or the repeating unit represented by the chemical formula (1-3) of the present invention is such that A is represented by the chemical formula ( It may be preferable to include at least two types of repeating units represented by chemical formula (1-2) or chemical formula (1-2) represented by 1-A).
- the diamine component that gives the repeating unit of the chemical formula (1-1), or the diamine component that gives the repeating unit of the chemical formula (1-2) and the chemical formula (1-3), the A represents the chemical formula ( It may be preferred to include at least two diamine components that give what is of structure 1-A).
- the diamine component in which the diamine component giving A in the chemical formula (1-1) or A in the chemical formula (1-2) and the chemical formula (1-3) gives the structure of the chemical formula (1-A) By containing at least two kinds of components, the obtained polyimide can be balanced between high transparency and low linear thermal expansion (that is, a polyimide having high transparency and low linear thermal expansion coefficient can be obtained).
- the polyimide precursor of the present invention may contain at least two repeating units of the chemical formula (1-2) in which A has the structure of the chemical formula (1-A). It may contain at least two repeating units of the chemical formula (1-3) having the structure of the chemical formula (1-A), and the chemical formula (A) is a structure of the chemical formula (1-A). It may include at least one repeating unit of 1-2) and at least one repeating unit of the chemical formula (1-3) in which A has the structure of the chemical formula (1-A).
- the polyimide precursor of the present invention comprises: (I) A is m and / or n is 1 to 3, and Z and / or W are each independently any of —NHCO—, —CONH—, —COO—, or —OCO—.
- (Ii) A is a structure of the chemical formula (1-A) in which m and n are 0, or the chemical formula in which m and / or n is 1 to 3, and Z and W are direct bonds
- the repeating unit (I) is, for example, a repeating unit of the chemical formula (1-1) in which A is represented by any one of the following chemical formulas (D-1) to (D-3).
- a unit is preferable, and a repeating unit of the above chemical formula (1-1) in which A is represented by any one of the following chemical formulas (D-1) to (D-2) is more preferable.
- the diamine component giving the repeating unit of the chemical formula (1-1) in which A is represented by the following chemical formula (D-1) or (D-2) is 4,4′-diaminobenzanilide.
- the diamine component that gives the repeating unit of the chemical formula (1-1) in which A is represented by the following chemical formula (D-3) is bis (4-aminophenyl) terephthalate, It can also be used in combination, or multiple types can be used in combination.
- the repeating unit (II) for example, the repeating unit of the chemical formula (1-1) in which A is represented by any one of the following chemical formulas (D-4) to (D-6) A unit is preferable, and a repeating unit of the above chemical formula (1-1) in which A is represented by any one of the following chemical formulas (D-4) to (D-5) is more preferable.
- the diamine component giving the repeating unit of the chemical formula (1-1) in which A is represented by the following chemical formula (D-4) is p-phenylenediamine, and A is represented by the following chemical formula (D-5).
- the diamine component giving the repeating unit of the chemical formula (1-1) is 2,2′-bis (trifluoromethyl) benzidine, and A is represented by the following chemical formula (D-6)
- the diamine component that gives the repeating unit of the above chemical formula (1-1) is m-tolidine, and these diamines may be used alone or in combination of two or more.
- the ratio of one or more of the repeating units (I) is 30 mol% or more and 70 mol% or less in the total repeating units represented by the chemical formula (1-1). And the ratio of one or more repeating units (II) is preferably 30 mol% or more and 70 mol% or less in the total repeating units represented by the chemical formula (1-1).
- the ratio of one or more units (I) is 40 mol% or more and 60 mol% or less in the total repeating units represented by the chemical formula (1-1), and one or more of the repeating units (II) It is particularly preferable that the ratio of the total is 40 mol% or more and 60 mol% or less in the total repeating units represented by the chemical formula (1-1).
- the ratio of the repeating unit (I) is more preferably less than 60 mol% in the total repeating units represented by the chemical formula (1-1), and is preferably 50 mol% or less. It is more preferable that it is 40 mol% or less.
- the repeating unit represented by the chemical formula (1-1) other than the repeating unit (I) and the repeating unit (II) (for example, A has a plurality of aromatic rings). In which all the aromatic rings are connected by an ether bond (—O—)), preferably less than 20 mol%, more preferably 10 mol in all repeating units represented by the chemical formula (1-1). %, Particularly preferably less than 10 mol% may be preferred.
- the ratio of one or more of the repeating units (I) is 20 mol% or more and 80 mol% or less in total in all repeating units represented by the chemical formula (1-1).
- the ratio of one or more repeating units (II) may be preferably 20 mol% or more and 80 mol% or less in total in all repeating units represented by the chemical formula (1-1).
- the polyimide precursor comprising the chemical formula (1-1) of the present invention or the repeating unit of the chemical formula (1-2) and / or the chemical formula (1-3) is represented by the chemical formula (1- 1), or a diamine component that gives A in the chemical formula (1-2) and the chemical formula (1-3) (repeating unit of the chemical formula (1-1), or the chemical formula (1-2) and the chemical formula ( 1-3) the diamine component that gives the repeating unit) includes at least two types of diamine components that give the structure of formula (1-A), one of which is 4,4′-diaminobenzanilide. preferable.
- the diamine component that gives A in the chemical formula (1-2) and the chemical formula (1-3) is at least two kinds of diamine components that give the structure of the chemical formula (1-A).
- one of them is 4,4′-diaminobenzanilide, it is possible to obtain a polyimide having high heat resistance in addition to high transparency and low linear thermal expansion.
- the polyimide precursor comprising the chemical formula (1-1) of the present invention or the repeating unit of the chemical formula (1-2) and / or the chemical formula (1-3) is represented by the chemical formula (1- 1), or a diamine component that gives A in the chemical formula (1-2) and the chemical formula (1-3) (repeating unit of the chemical formula (1-1), or the chemical formula (1-2) and the chemical formula ( 1-3) the diamine component giving the repeating unit) contains at least one selected from 2,2′-bis (trifluoromethyl) benzidine and p-phenylenediamine and 4,4′-diaminobenzanilide. Is particularly preferred.
- a polyimide having both high transparency, low linear thermal expansion and heat resistance can be obtained.
- the diamine component that gives the repeating unit of the chemical formula (1-2) and the chemical formula (1-3) preferably contains 4,4′-diaminobenzanilide in an amount of 20 mol% to 80 mol%, and , P-phenylenediamine and 2,2′-bis (trifluoromethyl) benzidine or both are preferably contained in an amount of 20 mol% or more and 80 mol% or less, more preferably 4,4′-diamino.
- Benzanilide is contained in an amount of 30 mol% or more and 70 mol% or less, and either p-phenylenediamine or 2,2′-bis (trifluoromethyl) benzidine It is preferable that it is contained at 30 mol% or more and 70 mol% or less in one or both, particularly preferably 4,4′-diaminobenzanilide is contained at 40 mol% or more and 60 mol% or less, and p-phenylenediamine. And 2,2′-bis (trifluoromethyl) benzidine or both are more preferably contained in an amount of 40 mol% or more and 60 mol% or less.
- 4,4′-diaminobenzanilide is 30 mol% or more and 70 mol%.
- High transparency and low content can be achieved by including at least 30 mol% and not more than 70 mol% in either or both of p-phenylenediamine and 2,2′-bis (trifluoromethyl) benzidine.
- a polyimide having both linear thermal expansion and heat resistance is obtained.
- the diamine component that gives the repeating unit of the chemical formula (1-2) and the chemical formula (1-3) is more preferably less than 60 mol%, and less than 50 mol% of 4,4′-diaminobenzanilide. It is more preferable that it is contained at 40 mol% or less.
- the polyimide precursor of the present invention may contain other repeating units other than the repeating unit represented by the chemical formula (1-1) or the chemical formula (1-2) and the chemical formula (1-3). .
- aromatic or aliphatic tetracarboxylic acids can be used as the tetracarboxylic acid component that gives other repeating units.
- bicyclo [2.2.1] heptane-2,3,5,6-tetracarboxylic acid bicyclo [2.2.2] octane-2,3,5,6-tetracarboxylic acid, ( 4arH, 8acH) -decahydro-1t, 4t: 5c, 8c-dimethanonaphthalene-2c, 3c, 6c, 7c-tetracarboxylic acid, (4arH, 8acH) -decahydro-1t, 4t: 5c, 8c-dimethanonaphthalene
- Derivatives such as -2t, 3t, 6c, 7c-tetracarboxylic acid, and these acid dianhydrides are more preferred because the polyimide is easy to produce and the resulting polyimide has excellent heat resistance.
- These acid dianhydrides may be used alone or in combination of two or more.
- the diamine component that gives other repeating units may be a diamine component that gives the structure of the chemical formula (1-A).
- A is a repeating unit of the chemical formula (1-1) having the structure of the chemical formula (1-A), or A is a structure of the chemical formula (1-A).
- the diamine exemplified as the diamine component that gives the repeating unit of the chemical formula (1-2) and the chemical formula (1-3) can be used. These diamines may be used alone or in combination of two or more.
- aromatic or aliphatic diamines can be used as the diamine component that gives other repeating units.
- the synthesis method of norbornane-2-spiro- ⁇ -cyclopentanone- ⁇ ′-spiro-2 ′′ -norbornane-5,5 ′′, 6,6 ′′ -tetracarboxylic acids and the like is not particularly limited. Can be synthesized by the method described in Patent Document 8. As described in Non-Patent Document 1, some stereoisomers may be included depending on the synthesis method. Purification of norbornane-2-spiro- ⁇ -cyclopentanone- ⁇ '-spiro-2 ′′ -norbornane-5,5 ′′, 6,6 ′′ -tetracarboxylic acid, etc. By doing so, the stereoisomers can be separated individually or several mixtures can be fractionated.
- the isomers may be isolated and used for polymerization or the like, or the isomers may be used as a mixture in polymerization or the like.
- R 1 and R 2 in the chemical formula (1) and R 3 and R 4 in the chemical formula (2) are each independently hydrogen, 1 to 6 carbon atoms, preferably 1 to 3 carbon atoms. Or an alkylsilyl group having 3 to 9 carbon atoms.
- R 1 and R 2 , R 3 and R 4 can change the type of functional group and the introduction rate of the functional group by the production method described later.
- R 1 and R 2 , R 3 and R 4 are hydrogen, polyimide tends to be easily produced.
- R 1 and R 2 , R 3 and R 4 are alkyl groups having 1 to 6 carbon atoms, preferably 1 to 3 carbon atoms, the storage stability of the polyimide precursor tends to be excellent.
- R 1 and R 2 , R 3 and R 4 are more preferably a methyl group or an ethyl group.
- R 1 and R 2 , R 3 and R 4 are alkylsilyl groups having 3 to 9 carbon atoms, the solubility of the polyimide precursor tends to be excellent.
- R 1 and R 2 , R 3 and R 4 are more preferably a trimethylsilyl group or a t-butyldimethylsilyl group.
- R 1 and R 2 , R 3 and R 4 are each 25% or more, preferably 50% or more, more preferably More than 75% can be an alkyl group or an alkylsilyl group.
- Polyimide precursors of the present invention the chemical structure R 1 and R 2, R 3 and R 4 take, 1) a polyamic acid (R 1 and R 2, R 3 and R 4 is hydrogen), 2) a polyamic acid ester (At least part of R 1 and R 2 , R 3 and R 4 is an alkyl group), 3) 4) Polyamic acid silyl ester (R 1 and R 2 , R 3 and R 4 are at least part of an alkylsilyl group) Can be classified. And the polyimide precursor of this invention can be easily manufactured with the following manufacturing methods for every classification. However, the manufacturing method of the polyimide precursor of this invention is not limited to the following manufacturing methods.
- the polyimide precursor of the present invention comprises a tetracarboxylic dianhydride as a tetracarboxylic acid component and a diamine component in a solvent in an equimolar amount, preferably a molar ratio of the diamine component to the tetracarboxylic acid component
- the number of moles of the component / the number of moles of the tetracarboxylic acid component] is preferably 0.90 to 1.10, more preferably 0.95 to 1.05, for example, imidization at a relatively low temperature of 120 ° C. or less. It can obtain suitably as a polyimide precursor solution composition by reacting, suppressing.
- diamine is dissolved in an organic solvent, and tetracarboxylic dianhydride is gradually added to this solution while stirring, and 0 to 120 ° C., preferably 5 to 80 ° C.
- a polyimide precursor is obtained by stirring for 1 to 72 hours in the range of ° C.
- the order of addition of diamine and tetracarboxylic dianhydride in the above production method is preferable because the molecular weight of the polyimide precursor is likely to increase.
- the molar ratio of the tetracarboxylic acid component and the diamine component is an excess of the diamine component, an amount of a carboxylic acid derivative substantially corresponding to the excess number of moles of the diamine component is added as necessary, The molar ratio of the components can be approximated to the equivalent.
- a carboxylic acid derivative herein, a tetracarboxylic acid that does not substantially increase the viscosity of the polyimide precursor solution, that is, substantially does not participate in molecular chain extension, or a tricarboxylic acid that functions as a terminal terminator and its anhydride, Dicarboxylic acid and its anhydride are preferred.
- a polyimide precursor can be easily obtained by dehydrating and condensing diester dicarboxylic acid and diamine using a phosphorus condensing agent or a carbodiimide condensing agent.
- the polyimide precursor obtained by this method is stable, it can be purified by reprecipitation by adding a solvent such as water or alcohol.
- silylating agent that does not contain chlorine as the silylating agent used here, because it is not necessary to purify the silylated diamine.
- the silylating agent not containing a chlorine atom include N, O-bis (trimethylsilyl) trifluoroacetamide, N, O-bis (trimethylsilyl) acetamide, and hexamethyldisilazane.
- N, O-bis (trimethylsilyl) acetamide and hexamethyldisilazane are particularly preferred because they do not contain fluorine atoms and are low in cost.
- an amine catalyst such as pyridine, piperidine or triethylamine can be used to accelerate the reaction.
- This catalyst can be used as it is as a polymerization catalyst for the polyimide precursor.
- a polyimide precursor is obtained by mixing the polyamic acid solution obtained by the method 1) and a silylating agent and stirring at 0 to 120 ° C., preferably 5 to 80 ° C. for 1 to 72 hours.
- the reaction is carried out at 80 ° C. or higher, the molecular weight varies depending on the temperature history at the time of polymerization, and imidization proceeds due to heat, so there is a possibility that the polyimide precursor cannot be produced stably.
- silylating agent used here it is preferable to use a silylating agent not containing chlorine because it is not necessary to purify the silylated polyamic acid or the obtained polyimide.
- examples of the silylating agent not containing a chlorine atom include N, O-bis (trimethylsilyl) trifluoroacetamide, N, O-bis (trimethylsilyl) acetamide, and hexamethyldisilazane.
- N, O-bis (trimethylsilyl) acetamide and hexamethyldisilazane are particularly preferred because they do not contain fluorine atoms and are low in cost.
- Any of the above production methods can be suitably carried out in an organic solvent, and as a result, a solution or solution composition containing a polyimide precursor can be easily obtained.
- Solvents used in preparing the polyimide precursor are, for example, N, N-dimethylformamide, N, N-dimethylacetamide, N-methyl-2-pyrrolidone, 1,3-dimethyl-2-imidazolidinone, dimethyl sulfoxide
- An aprotic solvent such as N, N-dimethylacetamide is preferred, but any type of solvent can be used without any problem as long as the raw material monomer component and the polyimide precursor to be produced are dissolved.
- the structure is not limited.
- amide solvents such as N, N-dimethylformamide, N, N-dimethylacetamide, N-methylpyrrolidone, ⁇ -butyrolactone, ⁇ -valerolactone, ⁇ -valerolactone, ⁇ -caprolactone, ⁇ -caprolactone, ⁇ - Cyclic ester solvents such as methyl- ⁇ -butyrolactone, carbonate solvents such as ethylene carbonate and propylene carbonate, glycol solvents such as triethylene glycol, phenols such as m-cresol, p-cresol, 3-chlorophenol and 4-chlorophenol A system solvent, acetophenone, 1,3-dimethyl-2-imidazolidinone, sulfolane, dimethyl sulfoxide and the like are preferably employed.
- the logarithmic viscosity of the polyimide precursor is not particularly limited, but the logarithmic viscosity in an N, N-dimethylacetamide solution having a concentration of 0.5 g / dL at 30 ° C. is 0.2 dL / g or more, more preferably 0. .3 dL / g or more, particularly preferably 0.4 dL / g or more.
- the logarithmic viscosity is 0.2 dL / g or more, the molecular weight of the polyimide precursor is high, and the mechanical strength and heat resistance of the resulting polyimide are excellent.
- the polyimide precursor composition of the present invention includes a polyimide precursor and an imidazole compound, and may be prepared by adding an imidazole compound to a polyimide precursor solution or solution composition obtained by the above production method. it can. Moreover, a solvent may be removed or added as needed, and desired components other than an imidazole compound may be added. In addition, a tetracarboxylic acid component (tetracarboxylic dianhydride or the like), a diamine component, and an imidazole compound are added to a solvent, and the tetracarboxylic acid component and the diamine component are reacted in the presence of the imidazole compound.
- the polyimide precursor composition solution composition containing a polyimide precursor and an imidazole compound
- the polyimide precursor composition can also be obtained.
- the imidazole compound used in the present invention is not particularly limited as long as it is a compound having an imidazole skeleton. By adding an imidazole compound, a polyimide having a small thickness direction retardation can be obtained.
- a compound having a boiling point at 1 atm of less than 340 ° C. preferably 330 ° C. or less, more preferably 300 ° C. or less, particularly preferably 270 ° C. or less
- the imidazole compound having a boiling point at 1 atm of less than 340 ° C. preferably 330 ° C. or less, more preferably 300 ° C. or less, particularly preferably 270 ° C. or less
- a more transparent polyimide may be obtained. .
- the imidazole compound used in the present invention is not particularly limited, and examples thereof include 1,2-dimethylimidazole, 1-methylimidazole, 2-methylimidazole, 2-phenylimidazole, imidazole, and benzimidazole.
- 1,2-dimethylimidazole (boiling point at 1 atmosphere: 205 ° C.), 1-methylimidazole (boiling point at 1 atmosphere: 198 ° C.), 2-methylimidazole (boiling point at 1 atmosphere: 268 ° C.), imidazole (boiling point at 1 atmosphere) : 256 ° C.) and the like, and 1,2-dimethylimidazole and 1-methylimidazole are particularly preferable.
- An imidazole compound may be used individually by 1 type, and can also be used in combination of multiple types.
- the content of the imidazole compound in the polyimide precursor composition is less than 4 mol with respect to 1 mol of the repeating unit of the polyimide precursor.
- the content of the imidazole compound is preferably 0.05 mol or more with respect to 1 mol of the repeating unit of the polyimide precursor, and is 2 mol or less with respect to 1 mol of the repeating unit of the polyimide precursor. preferable.
- 1 mol of the repeating unit of the polyimide precursor corresponds to 1 mol of the tetracarboxylic acid component.
- the polyimide precursor composition of the present invention usually contains a solvent.
- the solvent used for the polyimide precursor composition of the present invention is not a problem as long as the polyimide precursor is dissolved, and the structure is not particularly limited.
- solvents amide solvents such as N, N-dimethylformamide, N, N-dimethylacetamide, N-methyl-2-pyrrolidone, ⁇ -butyrolactone, ⁇ -valerolactone, ⁇ -valerolactone, ⁇ -caprolactone, ⁇ -caprolactone , Cyclic ester solvents such as ⁇ -methyl- ⁇ -butyrolactone, carbonate solvents such as ethylene carbonate and propylene carbonate, glycol solvents such as triethylene glycol, m-cresol, p-cresol, 3-chlorophenol, 4-chlorophenol Phenol solvents such as acetophenone, 1,3-dimethyl-2-imidazolidinone, sulfolane, dimethyl
- the total amount of the tetracarboxylic acid component and the diamine component is 5% by mass or more, preferably 10% by mass or more, more preferably 15%, based on the total amount of the solvent, the tetracarboxylic acid component and the diamine component.
- a ratio of not less than mass% is preferred.
- the total amount of the tetracarboxylic acid component and the diamine component is 60% by mass or less, preferably 50% by mass or less, based on the total amount of the solvent, the tetracarboxylic acid component, and the diamine component. Is preferred.
- This concentration is a concentration approximately approximate to the solid content concentration resulting from the polyimide precursor, but if this concentration is too low, it becomes difficult to control the film thickness of the polyimide film obtained, for example, when producing a polyimide film. Sometimes.
- the viscosity (rotational viscosity) of the polyimide precursor composition is not particularly limited, but the rotational viscosity measured using an E-type rotational viscometer at a temperature of 25 ° C. and a shear rate of 20 sec ⁇ 1 is 0.01 to 1000 Pa ⁇ sec is preferable, and 0.1 to 100 Pa ⁇ sec is more preferable. Moreover, thixotropy can also be provided as needed.
- the viscosity is in the above range, it is easy to handle when coating or forming a film, and the repelling is suppressed and the leveling property is excellent, so that a good film can be obtained.
- the polyimide precursor composition of the present invention includes chemical imidizing agents (acid anhydrides such as acetic anhydride, amine compounds such as pyridine and isoquinoline), antioxidants, fillers (inorganic particles such as silica, etc.) as necessary. ), Dyes, pigments, coupling agents such as silane coupling agents, primers, flame retardants, antifoaming agents, leveling agents, rheology control agents (flow aids), release agents and the like.
- chemical imidizing agents as acid anhydrides such as acetic anhydride, amine compounds such as pyridine and isoquinoline
- antioxidants such as amine compounds such as pyridine and isoquinoline
- fillers inorganic particles such as silica, etc.
- the polyimide of the present invention can be obtained by imidizing the polyimide precursor composition of the present invention as described above (that is, dehydrating and ring-closing reaction of the polyimide precursor).
- the imidization method is not particularly limited, and a known thermal imidation or chemical imidization method can be suitably applied.
- the form of the polyimide obtained can mention suitably a film, the laminated body of a polyimide film and another base material, a coating film, powder, a bead, a molded object, a foam.
- the polyimide precursor it is preferable to imidize the polyimide precursor by heat-treating the polyimide precursor composition at a maximum heating temperature exceeding 350 ° C.
- the maximum heating temperature of the heat treatment for imidization is more preferably higher than 380 ° C, and particularly preferably higher than 400 ° C.
- the mechanical properties of the resulting polyimide are improved.
- the upper limit of the maximum heating temperature of heat processing is not specifically limited, Usually, 500 degrees C or less is preferable.
- the polyimide precursor composition of the present invention is cast and applied on a substrate, and the polyimide precursor composition on the substrate is heated to a maximum heating temperature of 350 ° C., more preferably 380 ° C., particularly preferably 400.
- a polyimide can be suitably manufactured by heat-processing at the temperature exceeding 0 degreeC and imidating a polyimide precursor.
- the heating profile is not particularly limited and can be selected as appropriate. However, from the viewpoint of productivity, it is preferable that the heat treatment time is short.
- the polyimide precursor composition of the present invention is cast and applied on a substrate, and preferably dried in a temperature range of 180 ° C. or less to form a polyimide precursor composition film on the substrate.
- the maximum heating temperature exceeds 350 ° C., more preferably exceeds 380 ° C., and particularly preferably exceeds 400 ° C.
- a polyimide can be suitably manufactured also by heat-processing at temperature and imidizing a polyimide precursor.
- the polyimide obtained from the polyimide precursor composition of the present invention is not particularly limited, but the linear thermal expansion coefficient from 150 ° C. to 250 ° C. when formed into a film is preferably 60 ppm / K or less, More preferably, it is 50 ppm / K or less, More preferably, it is 45 ppm / K or less, More preferably, it is 40 ppm / K or less, Most preferably, it is 35 ppm / K or less.
- the linear thermal expansion coefficient is large, the difference in the linear thermal expansion coefficient with a conductor such as metal is large, which may cause problems such as an increase in warpage when a circuit board is formed.
- the polyimide obtained from the polyimide precursor composition of the present invention is not particularly limited, but preferably has a total light transmittance (average light transmittance of a wavelength of 380 nm to 780 nm) in a film having a thickness of 10 ⁇ m. May be 86% or more, more preferably 87% or more, and particularly preferably 88% or more. When used for a display application or the like, if the total light transmittance is low, it is necessary to strengthen the light source, which may cause a problem that energy is applied.
- the polyimide film when a polyimide film such as a display application is used for an application where light is transmitted, it is desirable that the polyimide film has high transparency.
- the polyimide (polyimide of the present invention) obtained from the polyimide precursor composition of the present invention is not particularly limited, but the light transmittance at a wavelength of 400 nm in a 10 ⁇ m thick film is preferably 75% or more, preferably 80%. Above, more preferably more than 80%, still more preferably 81% or more, particularly preferably 82% or more.
- the film made of the polyimide obtained from the polyimide precursor composition of the present invention depends on the use, but the thickness of the film is preferably 0.1 ⁇ m to 250 ⁇ m, more preferably 1 ⁇ m to The thickness is 150 ⁇ m, more preferably 1 ⁇ m to 50 ⁇ m, particularly preferably 1 ⁇ m to 30 ⁇ m.
- the polyimide film is used for light transmission, if the polyimide film is too thick, the light transmittance may be lowered.
- the polyimide obtained from the polyimide precursor composition of the present invention is not particularly limited, but the 1% weight loss temperature, which is an index of heat resistance of the polyimide film, is preferably 395 ° C. or more, more preferably It can be 430 ° C. or higher, more preferably 440 ° C. or higher, and particularly preferably 470 ° C. or higher.
- the 1% weight loss temperature which is an index of heat resistance of the polyimide film
- the polyimide obtained from the polyimide precursor composition of the present invention is not particularly limited, but the thickness direction retardation of the polyimide film is preferably 1000 nm or less, more preferably 800 nm or less, and even more preferably 700 nm or less. Particularly preferably, it can be 600 nm or less. When the retardation in the thickness direction is large, there are cases where the color of transmitted light is not displayed correctly, the color is blurred, and the viewing angle is narrowed.
- the polyimide obtained from the polyimide precursor composition of the present invention that is, the polyimide of the present invention has a small phase difference in the film thickness direction, and has excellent properties such as high transparency, bending resistance, and high heat resistance. Since it has a low coefficient of linear thermal expansion, it can be suitably used in applications such as a transparent substrate for display, a transparent substrate for touch panel, or a substrate for solar cell.
- the polyimide precursor composition (varnish) of the present invention is cast on a substrate such as ceramic (glass, silicon, alumina, etc.), metal (copper, aluminum, stainless steel, etc.), heat resistant plastic film (polyimide film, etc.), etc.
- a substrate such as ceramic (glass, silicon, alumina, etc.), metal (copper, aluminum, stainless steel, etc.), heat resistant plastic film (polyimide film, etc.), etc.
- a vacuum in an inert gas such as nitrogen, or in the air, drying is performed in a temperature range of 20 to 180 ° C., preferably 20 to 150 ° C. using hot air or infrared rays.
- the obtained polyimide precursor film is peeled off from the substrate or the polyimide precursor film from the substrate, and the end of the film is fixed, in vacuum, in an inert gas such as nitrogen,
- the polyimide film is heated and imidized using hot air or infrared rays in the air, for example, at 200 to 500 ° C., preferably at a maximum heating temperature of over 350 ° C., more preferably over 380 ° C., and particularly preferably over 400 ° C. /
- a substrate laminate or a polyimide film can be produced.
- the thickness of the polyimide film here is preferably 1 to 250 ⁇ m, more preferably 1 to 150 ⁇ m, because of the transportability in the subsequent steps.
- the imidization reaction of the polyimide precursor instead of the heat imidation by the heat treatment as described above, contains a dehydration cyclization reagent such as acetic anhydride in the presence of a tertiary amine such as pyridine or triethylamine. It is also possible to carry out by chemical treatment such as immersion in a solution. In addition, these dehydrating cyclization reagents are previously charged and stirred in a polyimide precursor composition (varnish), and cast and dried on a base material to obtain a partially imidized polyimide precursor. A polyimide film / base material laminate or a polyimide film can be obtained by further heat treatment as described above.
- a dehydration cyclization reagent such as acetic anhydride in the presence of a tertiary amine such as pyridine or triethylamine. It is also possible to carry out by chemical treatment such as immersion in a solution.
- these dehydrating cyclization reagents are previously charged
- a flexible conductive substrate can be obtained by forming a conductive layer on one side or both sides of the polyimide film / base laminate or the polyimide film obtained in this way.
- a flexible conductive substrate can be obtained, for example, by the following method. That is, as a first method, the polyimide film / substrate laminate is not peeled off from the substrate, and the surface of the polyimide film is sputtered, vapor-deposited, printed, etc. by a conductive substance (metal or metal oxide). A conductive layer of conductive layer / polyimide film / base material is produced. Then, if necessary, a transparent and flexible conductive substrate comprising the conductive layer / polyimide film laminate can be obtained by peeling the conductive layer / polyimide film laminate from the substrate.
- a transparent and flexible conductive substrate comprising the conductive layer / polyimide film laminate can be obtained by peeling the conductive layer / polyimide film laminate from the substrate.
- the polyimide film is peeled off from the substrate of the polyimide film / substrate laminate to obtain a polyimide film, and a conductive substance (metal or metal oxide, conductive organic substance, A conductive layer of conductive carbon, etc.) is formed in the same manner as in the first method, and is a transparent and flexible conductive layer comprising a conductive layer / polyimide film laminate and a conductive layer / polyimide film laminate / conductive layer.
- a substrate can be obtained.
- a gas barrier layer such as water vapor or oxygen, light adjustment by sputtering, vapor deposition or gel-sol method, etc.
- An inorganic layer such as a layer may be formed.
- the conductive layer is preferably formed with a circuit by a method such as a photolithography method, various printing methods, or an ink jet method.
- the substrate of the present invention thus obtained has a circuit of a conductive layer on the surface of a polyimide film composed of the polyimide of the present invention, with a gas barrier layer or an inorganic layer as necessary.
- This substrate is flexible, has excellent transparency, bendability, and heat resistance, and further has a very low linear thermal expansion coefficient and excellent solvent resistance, so that a fine circuit can be easily formed. Therefore, this board
- a transistor inorganic transistor, organic transistor
- a transistor is further formed on this substrate by vapor deposition, various printing methods, an ink jet method or the like to manufacture a flexible thin film transistor, and a liquid crystal element, an EL element, a photoelectric transistor for a display device are manufactured. It is suitably used as an element.
- Linear thermal expansion coefficient (CTE) A polyimide film having a thickness of about 10 ⁇ m is cut into a strip having a width of 4 mm to form a test piece, and TMA / SS6100 (manufactured by SII Nano Technology Co., Ltd.) is used. The length between chucks is 15 mm, the load is 2 g, and the heating rate is 20 ° C. / The temperature was raised to 500 ° C. in minutes. The linear thermal expansion coefficient from 150 ° C. to 250 ° C. was determined from the obtained TMA curve.
- a polyimide film having a film thickness of about 10 ⁇ m was used as a test piece, and the temperature was raised from 25 ° C. to 600 ° C. at a temperature rising rate of 10 ° C./min in a nitrogen stream using a calorimeter measuring device (Q5000IR) manufactured by TA Instruments. From the obtained weight curve, a 1% weight loss temperature was determined.
- Table 1-1 shows tetracarboxylic acid components used in Examples and Comparative Examples
- Table 1-2 shows Examples and Comparative Examples
- Table 1-3 Examples and Imidazole Imidazolines Used in Comparative Examples The structural formula of the compound is described.
- Example 1 0.05 g (0.5 mmol) of 1,2-dimethylimidazole and 0.05 g of N-methyl-2-pyrrolidone were added to the reaction vessel to obtain a uniform solution. 33.76 g of varnish A obtained in Synthesis Example 1 (10 mmol with respect to the molecular weight of the repeating unit of the polyimide precursor in varnish A) was added to the solution, and the mixture was stirred at room temperature for 3 hours to obtain a uniform and viscous polyimide. A precursor solution was obtained. When calculated from the charged amount, 0.05 mol of 1,2-dimethylimidazole is used per 1 mol of the repeating unit of the polyimide precursor.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, heated in a nitrogen atmosphere (oxygen concentration 200 ppm or less) from room temperature to 410 ° C. as it is, and thermally imidized to be colorless.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- Example 2 0.15 g (1.6 mmol) of 1,2-dimethylimidazole and 0.15 g of N-methyl-2-pyrrolidone were added to the reaction vessel to obtain a uniform solution. 33.76 g of varnish A obtained in Synthesis Example 1 (10 mmol with respect to the molecular weight of the repeating unit of the polyimide precursor in varnish A) was added to the solution, and the mixture was stirred at room temperature for 3 hours to obtain a uniform and viscous polyimide. A precursor solution was obtained. When calculated from the charged amount, 1,6-dimethylimidazole is 0.16 mol per 1 mol of the repeating unit of the polyimide precursor.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, heated in a nitrogen atmosphere (oxygen concentration 200 ppm or less) from room temperature to 410 ° C. as it is, and thermally imidized to be colorless.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- Example 3 0.19 g (2.0 mmol) of 1,2-dimethylimidazole and 0.19 g of N-methyl-2-pyrrolidone were added to the reaction vessel to obtain a uniform solution. 33.76 g of varnish A obtained in Synthesis Example 1 (10 mmol with respect to the molecular weight of the repeating unit of the polyimide precursor in varnish A) was added to the solution, and the mixture was stirred at room temperature for 3 hours to obtain a uniform and viscous polyimide. A precursor solution was obtained. When calculated from the charged amount, 1,2-dimethylimidazole is 0.2 mol per 1 mol of the repeating unit of the polyimide precursor.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, heated in a nitrogen atmosphere (oxygen concentration 200 ppm or less) from room temperature to 410 ° C. as it is, and thermally imidized to be colorless.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- Example 4 0.96 g (10.0 mmol) of 1,2-dimethylimidazole and 0.38 g of N-methyl-2-pyrrolidone were added to the reaction vessel to obtain a uniform solution. 33.76 g of varnish A obtained in Synthesis Example 1 (10 mmol with respect to the molecular weight of the repeating unit of the polyimide precursor in varnish A) was added to the solution, and the mixture was stirred at room temperature for 3 hours to obtain a uniform and viscous polyimide. A precursor solution was obtained. When calculated from the charged amount, the amount of 1,2-dimethylimidazole per 1.0 mol of the repeating unit of the polyimide precursor is 1.0 mol.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, heated in a nitrogen atmosphere (oxygen concentration 200 ppm or less) from room temperature to 410 ° C. as it is, and thermally imidized to be colorless.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- Example 5 1.92 g (20.0 mmol) of 1,2-dimethylimidazole and 0.38 g of N-methyl-2-pyrrolidone were added to the reaction vessel to obtain a uniform solution. 33.76 g of varnish A obtained in Synthesis Example 1 (10 mmol with respect to the molecular weight of the repeating unit of the polyimide precursor in varnish A) was added to the solution, and the mixture was stirred at room temperature for 3 hours to obtain a uniform and viscous polyimide. A precursor solution was obtained. When calculated from the charged amount, the amount of 1,2-dimethylimidazole relative to 1 mol of the repeating unit of the polyimide precursor is 2.0 mol.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, heated in a nitrogen atmosphere (oxygen concentration 200 ppm or less) from room temperature to 410 ° C. as it is, and thermally imidized to be colorless.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- Example 6 0.04 g (0.5 mmol) of 1-methylimidazole and 0.04 g of N-methyl-2-pyrrolidone were added to the reaction vessel to obtain a uniform solution. 33.76 g of varnish A obtained in Synthesis Example 1 (10 mmol with respect to the molecular weight of the repeating unit of the polyimide precursor in varnish A) was added to the solution, and the mixture was stirred at room temperature for 3 hours to obtain a uniform and viscous polyimide. A precursor solution was obtained. When calculated from the charged amount, 1-methylimidazole is 0.05 mol per 1 mol of the repeating unit of the polyimide precursor.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, heated in a nitrogen atmosphere (oxygen concentration 200 ppm or less) from room temperature to 410 ° C. as it is, and thermally imidized to be colorless.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- Example 7 0.08 g (1.0 mmol) of 1-methylimidazole and 0.08 g of N-methyl-2-pyrrolidone were added to the reaction vessel to obtain a uniform solution. 33.76 g of varnish A obtained in Synthesis Example 1 (10 mmol with respect to the molecular weight of the repeating unit of the polyimide precursor in varnish A) was added to the solution, and the mixture was stirred at room temperature for 3 hours to obtain a uniform and viscous polyimide. A precursor solution was obtained. When calculated from the charged amount, 1-methylimidazole is 0.1 mol per 1 mol of the repeating unit of the polyimide precursor.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, heated in a nitrogen atmosphere (oxygen concentration 200 ppm or less) from room temperature to 410 ° C. as it is, and thermally imidized to be colorless.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- Example 8 0.16 g (2.0 mmol) of 1-methylimidazole and 0.16 g of N-methyl-2-pyrrolidone were added to the reaction vessel to obtain a uniform solution. 33.76 g of varnish A obtained in Synthesis Example 1 (10 mmol with respect to the molecular weight of the repeating unit of the polyimide precursor in varnish A) was added to the solution, and the mixture was stirred at room temperature for 3 hours to obtain a uniform and viscous polyimide. A precursor solution was obtained. When calculated from the charged amount, 1-methylimidazole is 0.2 mol per 1 mol of the repeating unit of the polyimide precursor.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, heated in a nitrogen atmosphere (oxygen concentration 200 ppm or less) from room temperature to 410 ° C. as it is, and thermally imidized to be colorless.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- Example 9 A uniform solution was obtained by adding 0.33 g (4.0 mmol) of 1-methylimidazole and 0.33 g of N-methyl-2-pyrrolidone to the reaction vessel. 33.76 g of varnish A obtained in Synthesis Example 1 (10 mmol with respect to the molecular weight of the repeating unit of the polyimide precursor in varnish A) was added to the solution, and the mixture was stirred at room temperature for 3 hours to obtain a uniform and viscous polyimide. A precursor solution was obtained. When calculated from the charged amount, 1-methylimidazole is 0.4 mol per 1 mol of the repeating unit of the polyimide precursor.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, heated in a nitrogen atmosphere (oxygen concentration 200 ppm or less) from room temperature to 410 ° C. as it is, and thermally imidized to be colorless.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- Example 10 0.16 g (2.0 mmol) of 2-methylimidazole and 0.16 g of N-methyl-2-pyrrolidone were added to the reaction vessel to obtain a uniform solution. 33.76 g of varnish A obtained in Synthesis Example 1 (10 mmol with respect to the molecular weight of the repeating unit of the polyimide precursor in varnish A) was added to the solution, and the mixture was stirred at room temperature for 3 hours to obtain a uniform and viscous polyimide. A precursor solution was obtained. When calculated from the charged amount, 2-methylimidazole is 0.2 mol per 1 mol of the repeating unit of the polyimide precursor.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, heated in a nitrogen atmosphere (oxygen concentration 200 ppm or less) from room temperature to 410 ° C. as it is, and thermally imidized to be colorless.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- Example 11 0.14 g (2.0 mmol) of imidazole and 0.14 g of N-methyl-2-pyrrolidone were added to the reaction vessel to obtain a uniform solution. 33.76 g of varnish A obtained in Synthesis Example 1 (10 mmol with respect to the molecular weight of the repeating unit of the polyimide precursor in varnish A) was added to the solution, and the mixture was stirred at room temperature for 3 hours to obtain a uniform and viscous polyimide. A precursor solution was obtained. When calculated from the charged amount, imidazole is 0.2 mol with respect to 1 mol of the repeating unit of the polyimide precursor.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, heated in a nitrogen atmosphere (oxygen concentration 200 ppm or less) from room temperature to 410 ° C. as it is, and thermally imidized to be colorless.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- Example 12 0.29 g (2.0 mmol) of 2-phenylimidazole and 0.29 g of N-methyl-2-pyrrolidone were added to the reaction vessel to obtain a uniform solution. 33.76 g of varnish A obtained in Synthesis Example 1 (10 mmol with respect to the molecular weight of the repeating unit of the polyimide precursor in varnish A) was added to the solution, and the mixture was stirred at room temperature for 3 hours to obtain a uniform and viscous polyimide. A precursor solution was obtained. When calculated from the charged amount, 2-phenylimidazole is 0.2 mol per 1 mol of the repeating unit of the polyimide precursor.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, heated in a nitrogen atmosphere (oxygen concentration 200 ppm or less) from room temperature to 410 ° C. as it is, and thermally imidized to be colorless.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- Example 13 A uniform solution was obtained by adding 0.24 g (2.0 mmol) of benzimidazole and 0.24 g of N-methyl-2-pyrrolidone to the reaction vessel. 33.76 g of varnish A obtained in Synthesis Example 1 (10 mmol with respect to the molecular weight of the repeating unit of the polyimide precursor in varnish A) was added to the solution, and the mixture was stirred at room temperature for 3 hours to obtain a uniform and viscous polyimide. A precursor solution was obtained. Calculating from the charged amount, benzimidazole is 0.2 mol per 1 mol of the repeating unit of the polyimide precursor.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, heated in a nitrogen atmosphere (oxygen concentration 200 ppm or less) from room temperature to 410 ° C. as it is, and thermally imidized to be colorless.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, and heated in a nitrogen atmosphere (oxygen concentration of 200 ppm or less) from room temperature to 350 ° C. as it is, and thermally imidized.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- Example 14 0.05 g (0.5 mmol) of 1,2-dimethylimidazole and 0.05 g of N-methyl-2-pyrrolidone were added to the reaction vessel to obtain a uniform solution.
- 35.39 g of varnish B obtained in Synthesis Example 2 (10 mmol with respect to the molecular weight of the repeating unit of the polyimide precursor in varnish B) was added to the solution, and the mixture was stirred at room temperature for 3 hours to obtain a uniform and viscous polyimide. A precursor solution was obtained. When calculated from the charged amount, 0.05 mol of 1,2-dimethylimidazole per 1 mol of the repeating unit of the polyimide precursor.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, heated in a nitrogen atmosphere (oxygen concentration 200 ppm or less) from room temperature to 410 ° C. as it is, and thermally imidized to be colorless.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- Example 15 0.10 g (1.0 mmol) of 1,2-dimethylimidazole and 0.10 g of N-methyl-2-pyrrolidone were added to the reaction vessel to obtain a uniform solution. 35.39 g of varnish B obtained in Synthesis Example 2 (10 mmol with respect to the molecular weight of the repeating unit of the polyimide precursor in varnish B) was added to the solution, and the mixture was stirred at room temperature for 3 hours to obtain a uniform and viscous polyimide. A precursor solution was obtained. When calculated from the charged amount, 1,2-dimethylimidazole is 0.1 mol per 1 mol of the repeating unit of the polyimide precursor.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, heated in a nitrogen atmosphere (oxygen concentration 200 ppm or less) from room temperature to 410 ° C. as it is, and thermally imidized to be colorless.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- Example 16 0.19 g (2.0 mmol) of 1,2-dimethylimidazole and 0.19 g of N-methyl-2-pyrrolidone were added to the reaction vessel to obtain a uniform solution. 35.39 g of varnish B obtained in Synthesis Example 2 (10 mmol with respect to the molecular weight of the repeating unit of the polyimide precursor in varnish B) was added to the solution, and the mixture was stirred at room temperature for 3 hours to obtain a uniform and viscous polyimide. A precursor solution was obtained. When calculated from the charged amount, the amount of 1,2-dimethylimidazole is 0.2 mol with respect to 1 mol of the repeating unit of the polyimide precursor.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, heated in a nitrogen atmosphere (oxygen concentration 200 ppm or less) from room temperature to 410 ° C. as it is, and thermally imidized to be colorless.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- Example 17 0.16 g (2.0 mmol) of 1-methylimidazole and 0.16 g of N-methyl-2-pyrrolidone were added to the reaction vessel to obtain a uniform solution. 35.39 g of varnish B obtained in Synthesis Example 2 (10 mmol with respect to the molecular weight of the repeating unit of the polyimide precursor in varnish B) was added to the solution, and the mixture was stirred at room temperature for 3 hours to obtain a uniform and viscous polyimide. A precursor solution was obtained. When calculated from the charged amount, 1-methylimidazole is 0.2 mol per 1 mol of the repeating unit of the polyimide precursor.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, heated in a nitrogen atmosphere (oxygen concentration 200 ppm or less) from room temperature to 410 ° C. as it is, and thermally imidized to be colorless.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, heated in a nitrogen atmosphere (oxygen concentration 200 ppm or less) from room temperature to 410 ° C. as it is, and thermally imidized to be colorless.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, heated in a nitrogen atmosphere (oxygen concentration 200 ppm or less) from room temperature to 410 ° C. as it is, and thermally imidized to be colorless.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, heated in a nitrogen atmosphere (oxygen concentration 200 ppm or less) from room temperature to 410 ° C. as it is, and thermally imidized to be colorless.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- Example 18 0.10 g (1.0 mmol) of 1,2-dimethylimidazole and 0.10 g of N-methyl-2-pyrrolidone were added to the reaction vessel to obtain a uniform solution. To the solution, 38.23 g of varnish C obtained in Synthesis Example 3 (10 mmol with respect to the molecular weight of the repeating unit of the polyimide precursor in varnish C) was added and stirred at room temperature for 3 hours to obtain a uniform and viscous polyimide. A precursor solution was obtained. When calculated from the charged amount, 1,2-dimethylimidazole is 0.1 mol per 1 mol of the repeating unit of the polyimide precursor.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, heated in a nitrogen atmosphere (oxygen concentration 200 ppm or less) from room temperature to 410 ° C. as it is, and thermally imidized to be colorless.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- Example 19 0.10 g (1.0 mmol) of 1,2-dimethylimidazole and 0.10 g of N-methyl-2-pyrrolidone were added to the reaction vessel to obtain a uniform solution. To the solution, 35.99 g of varnish D obtained in Synthesis Example 4 (10 mmol with respect to the molecular weight of the repeating unit of the polyimide precursor in varnish D) was added and stirred at room temperature for 3 hours to obtain a uniform and viscous polyimide. A precursor solution was obtained. When calculated from the charged amount, 1,2-dimethylimidazole is 0.1 mol per 1 mol of the repeating unit of the polyimide precursor.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, heated in a nitrogen atmosphere (oxygen concentration 200 ppm or less) from room temperature to 410 ° C. as it is, and thermally imidized to be colorless.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- Example 20 0.10 g (1.0 mmol) of 1,2-dimethylimidazole and 0.10 g of N-methyl-2-pyrrolidone were added to the reaction vessel to obtain a uniform solution. To the solution was added 35.09 g of varnish E obtained in Synthesis Example 5 (10 mmol with respect to the molecular weight of the repeating unit of the polyimide precursor in varnish E), and the mixture was stirred at room temperature for 3 hours to obtain a uniform and viscous polyimide. A precursor solution was obtained. When calculated from the charged amount, 1,2-dimethylimidazole is 0.1 mol per 1 mol of the repeating unit of the polyimide precursor.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, heated in a nitrogen atmosphere (oxygen concentration 200 ppm or less) from room temperature to 410 ° C. as it is, and thermally imidized to be colorless.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- Example 21 0.19 g (2.0 mmol) of 1,2-dimethylimidazole and 0.19 g of N-methyl-2-pyrrolidone were added to the reaction vessel to obtain a uniform solution.
- 24.97 g of varnish F obtained in Synthesis Example 6 (10 mmol with respect to the molecular weight of the repeating unit of the polyimide precursor in varnish F) was added to the solution, and the mixture was stirred at room temperature for 3 hours to obtain a uniform and viscous polyimide. A precursor solution was obtained. When calculated from the charged amount, the amount of 1,2-dimethylimidazole is 0.2 mol with respect to 1 mol of the repeating unit of the polyimide precursor.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, and heated in a nitrogen atmosphere (oxygen concentration of 200 ppm or less) from room temperature to 400 ° C. as it is, and thermally imidized to be colorless.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- Example 22 0.19 g (2.0 mmol) of 1,2-dimethylimidazole and 0.19 g of N-methyl-2-pyrrolidone were added to the reaction vessel to obtain a uniform solution.
- 37.04 g of varnish G obtained in Synthesis Example 7 (10 mmol with respect to the molecular weight of the polyimide precursor repeating unit in varnish G) was added to the solution, and the mixture was stirred at room temperature for 3 hours to obtain a uniform and viscous polyimide. A precursor solution was obtained. When calculated from the charged amount, the amount of 1,2-dimethylimidazole is 0.2 mol with respect to 1 mol of the repeating unit of the polyimide precursor.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, and heated in a nitrogen atmosphere (oxygen concentration of 200 ppm or less) from room temperature to 350 ° C. as it is, and thermally imidized.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- Example 23 0.19 g (2.0 mmol) of 1,2-dimethylimidazole and 0.19 g of N-methyl-2-pyrrolidone were added to the reaction vessel to obtain a uniform solution.
- 33.53 g of varnish H obtained in Synthesis Example 8 (10 mmol with respect to the molecular weight of the polyimide precursor repeating unit in varnish H) was added to the solution, and the mixture was stirred at room temperature for 3 hours to obtain a uniform and viscous polyimide. A precursor solution was obtained. When calculated from the charged amount, the amount of 1,2-dimethylimidazole is 0.2 mol with respect to 1 mol of the repeating unit of the polyimide precursor.
- a polyimide precursor solution filtered through a PTFE membrane filter is applied to a glass substrate, and heated in a nitrogen atmosphere (oxygen concentration of 200 ppm or less) from room temperature to 370 ° C. as it is, and thermally imidized to be colorless.
- a transparent polyimide film / glass laminate was obtained.
- the obtained polyimide film / glass laminate was immersed in water and then peeled off and dried to obtain a polyimide film having a film thickness of about 10 ⁇ m.
- polyimide precursors containing imidazole compounds (1,2-dimethylimidazole, 1-methylimidazole, 2-methylimidazole, 2-phenylimidazole, benzimidazole, or imidazole) are shown. It can be seen that the polyimide obtained from the body composition has a small thickness direction retardation (Examples 1 to 13 and Comparative Example 1, Examples 14 to 17 and Comparative Example 3, Example 18 and Comparative Example 9, Example) 19 and Comparative Example 10, Example 20 and Comparative Example 11, Example 21 and Comparative Example 12, Example 22 and Comparative Example 13, Example 23 and Comparative Example 14).
- the polyimide obtained from the polyimide precursor composition of the present invention has excellent light transmittance, mechanical properties, and low linear thermal expansion coefficient in addition to a small thickness direction retardation.
- the polyimide film of the present invention can be suitably used as a transparent substrate that is colorless and transparent and capable of forming a fine circuit, such as for display applications.
- a polyimide having excellent transparency and having a smaller thickness direction retardation even in the same composition, or a polyimide having a small thickness direction retardation, excellent transparency, and excellent mechanical properties can be obtained.
- a polyimide precursor composition solution composition containing a polyimide precursor
- a method for producing polyimide can be provided.
- the polyimide obtained from this polyimide precursor composition is highly transparent and has a small thickness direction retardation, and also has a low linear thermal expansion coefficient and facilitates the formation of fine circuits. It can be suitably used for forming substrates for touch panels, solar cells, and the like.
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Abstract
Description
1. 下記化学式(1)で表される繰り返し単位、または下記化学式(2)で表される繰り返し単位を含むポリイミド前駆体と、
イミダゾール系化合物を含み、
イミダゾール系化合物の含有量が、ポリイミド前駆体の繰り返し単位1モルに対して4モル未満であることを特徴とするポリイミド前駆体組成物。
3. 前記イミダゾール系化合物の含有量が、ポリイミド前駆体の繰り返し単位1モルに対して0.05モル以上2モル以下であることを特徴とする前記項1又は2に記載のポリイミド前駆体組成物。
4. 前記イミダゾール系化合物の1気圧における沸点が340℃未満であることを特徴とする前記項1~3のいずれかに記載のポリイミド前駆体組成物。
5. 前記イミダゾール系化合物が、1,2-ジメチルイミダゾール、1-メチルイミダゾール、2-メチルイミダゾール、2-フェニルイミダゾール、イミダゾール、またはベンゾイミダゾールのいずれかであることを特徴とする前記項1~4のいずれかに記載のポリイミド前駆体組成物。
6. 前記項1~5のいずれかに記載のポリイミド前駆体組成物を、最高加熱温度350℃超で加熱処理して、ポリイミド前駆体をイミド化することを特徴とするポリイミドの製造方法。
7. 前記項1~5のいずれかに記載のポリイミド前駆体組成物を基材上に塗布する工程と、
基材上のポリイミド前駆体組成物を、最高加熱温度350℃超で加熱処理して、ポリイミド前駆体をイミド化する工程と
を有することを特徴とする前記項6に記載のポリイミドの製造方法。
8. 前記加熱処理の最高加熱温度が400℃を超えることを特徴とする前記項6又は7に記載のポリイミドの製造方法。
9. 前記項6~8のいずれかに記載の方法により製造されるポリイミド。
10. 厚さ10μmのフィルムでの波長400nmの光透過率が75%以上であることを特徴とする前記項9に記載のポリイミド。
11. 前記項6~8のいずれかに記載の方法により製造されるポリイミドフィルム。
12. 前記項9又は10に記載のポリイミド、又は前記項11に記載のポリイミドフィルムを含むことを特徴とするディスプレイ用、タッチパネル用、または太陽電池用の基板。
(i)Aが、mおよび/またはnが1~3であり、Zおよび/またはWが、それぞれ独立に、-NHCO-、-CONH-、-COO-、または-OCO-のいずれかである前記化学式(1-A)の構造である前記化学式(1-1)、好ましくは前記化学式(1-2)及び前記化学式(1-3)の繰り返し単位(I)を少なくとも1種含み、
(ii)Aが、mおよびnが0である前記化学式(1-A)の構造であるか、または、mおよび/またはnが1~3であり、ZおよびWが直接結合である前記化学式(1-A)の構造である前記化学式(1-1)、好ましくは前記化学式(1-2)及び前記化学式(1-3)の繰り返し単位(II)を少なくとも1種含むことがより好ましいことがある。
本発明のポリイミド前駆体は、溶媒中でテトラカルボン酸成分としてのテトラカルボン酸二無水物とジアミン成分とを略等モル、好ましくはテトラカルボン酸成分に対するジアミン成分のモル比[ジアミン成分のモル数/テトラカルボン酸成分のモル数]が好ましくは0.90~1.10、より好ましくは0.95~1.05の割合で、例えば120℃以下の比較的低温度でイミド化を抑制しながら反応することによって、ポリイミド前駆体溶液組成物として好適に得ることができる。
テトラカルボン酸二無水物を任意のアルコールと反応させ、ジエステルジカルボン酸を得た後、塩素化試薬(チオニルクロライド、オキサリルクロライドなど)と反応させ、ジエステルジカルボン酸クロライドを得る。このジエステルジカルボン酸クロライドとジアミンを-20~120℃、好ましくは-5~80℃の範囲で1~72時間攪拌することで、ポリイミド前駆体が得られる。80℃以上で反応させる場合、分子量が重合時の温度履歴に依存して変動し、また熱によりイミド化が進行することから、ポリイミド前駆体を安定して製造できなくなる可能性がある。また、ジエステルジカルボン酸とジアミンを、リン系縮合剤や、カルボジイミド縮合剤などを用いて脱水縮合することでも、簡便にポリイミド前駆体が得られる。
あらかじめ、ジアミンとシリル化剤を反応させ、シリル化されたジアミンを得る。必要に応じて、蒸留等により、シリル化されたジアミンの精製を行う。そして、脱水された溶剤中にシリル化されたジアミンを溶解させておき、攪拌しながら、テトラカルボン酸二無水物を徐々に添加し、0~120℃、好ましくは5~80℃の範囲で1~72時間攪拌することで、ポリイミド前駆体が得られる。80℃以上で反応させる場合、分子量が重合時の温度履歴に依存して変動し、また熱によりイミド化が進行することから、ポリイミド前駆体を安定して製造できなくなる可能性がある。
1)の方法で得られたポリアミド酸溶液とシリル化剤を混合し、0~120℃、好ましくは5~80℃の範囲で1~72時間攪拌することで、ポリイミド前駆体が得られる。80℃以上で反応させる場合、分子量が重合時の温度履歴に依存して変動し、また熱によりイミド化が進行することから、ポリイミド前駆体を安定して製造できなくなる可能性がある。
[保存安定性]
23℃でワニスを保存し、3日後に流動性のある均一な状態であれば○、
3日後に白濁、もしくはゲル化していれば×とする。
[400nm光透過率、全光透過率]
紫外可視分光光度計/V-650DS(日本分光製)を用いて、膜厚約10μmのポリイミド膜の400nmにおける光透過率と、全光透過率(380nm~780nmにおける平均透過率)を測定した。測定した400nmにおける光透過率と、全光透過率を反射率を10%としてランベルト・ベール式を用いて、10μm厚の400nmにおける光透過率と、全光透過率を算出した。算出式を下記に示す。
Log10((T2+10)/100)=10/L×(Log10((T2’+10)/100))
T1:反射率を10%としたときの10μm厚のポリイミドフィルムの400nmにおける光透過率(%)
T1’:測定した400nmにおける光透過率(%)
T2:反射率を10%としたときの10μm厚のポリイミドフィルムの全光透過率(%)
T2’:測定した全光透過率(%)
L:測定したポリイミドフィルムの膜厚(μm)
膜厚約10μmのポリイミドフィルムをIEC450規格のダンベル形状に打ち抜いて試験片とし、ORIENTEC社製TENSILONを用いて、チャック間長30mm、引張速度2mm/分で、初期の弾性率、破断点伸度を測定した。
膜厚約10μmのポリイミドフィルムを幅4mmの短冊状に切り取って試験片とし、TMA/SS6100 (エスアイアイ・ナノテクノロジー株式会社製)を用い、チャック間長15mm、荷重2g、昇温速度20℃/分で500℃まで昇温した。得られたTMA曲線から、150℃から250℃までの線熱膨張係数を求めた。
膜厚約10μmのポリイミドフィルムを試験片とし、TAインスツルメント社製 熱量計測定装置(Q5000IR)を用い、窒素気流中、昇温速度10℃/分で25℃から600℃まで昇温した。得られた重量曲線から、1%重量減少温度を求めた。
膜厚10μmのポリイミドフィルムを試験片とし、王子計測器社製 位相差測定装置(KOBRA-WR)を用い、入射角を40°としてフィルムの位相差測定を行った。得られた位相差より、膜厚10μmのフィルムの厚み方向の位相差を求めた。
tra-DACH:トランス-1,4-ジアミノシクロヘキサン〔純度:99.1%(GC分析)〕
DABAN: 4,4’-ジアミノベンズアニリド〔純度:99.90%(GC分析)〕
PPD: p-フェニレンジアミン〔純度:99.9%(GC分析)〕
4,4’-ODA: 4,4’-オキシジアニリン〔純度:99.9%(GC分析)〕
BAPB: 4,4’-ビス(4-アミノフェノキシ)ビフェニル〔純度:99.93%(HPLC分析)〕
[テトラカルボン酸成分]
s-BPDA:3,3’,4,4’-ビフェニルテトラカルボン酸二無水物〔純度99.9%(H-NMR分析)〕
a-BPDA:2,3,3’,4’-ビフェニルテトラカルボン酸二無水物〔純度99.6%(H-NMR分析)〕
PMDA-HS: 1R,2S,4S,5R-シクロヘキサンテトラカルボン酸二無水物〔純度:99.9%(GC分析)〕
CpODA-tee:trans-endo-endo-ノルボルナン-2-スピロ-α-シクロペンタノン-α’-スピロ-2’’-ノルボルナン-5,5’’,6,6’’-テトラカルボン酸二無水物
CpODA-cee:cis-endo-endo-ノルボルナン-2-スピロ-α-シクロペンタノン-α’-スピロ-2’’-ノルボルナン-5,5’’,6,6’’-テトラカルボン酸二無水物
CpODA:CpODA-teeとCpODA-ceeの混合物
PACDA:N,N’-(1,4-フェニレン)ビス(1,3-ジオキソオクタヒドロイソベンゾフラン-5-カルボキシアミド)
NMP: N-メチル-2-ピロリドン
窒素ガスで置換した反応容器中にDABAN 90.91g(0.4モル)とPPD 64.88g(0.6モル)を入れ、N-メチル-2-ピロリドンを、仕込みモノマー総質量(ジアミン成分とカルボン酸成分の総和)が 16質量%となる量の2835.90gを加え、室温で1時間攪拌した。この溶液にCpODA 384.38g(1.0モル)を徐々に加えた。室温で12時間撹拌し、均一で粘稠なポリイミド前駆体溶液(ワニスA)を得た。
窒素ガスで置換した反応容器中にDABAN 90.91g(0.4モル)とPPD 54.07g(0.5モル)とBAPB 36.84g(0.1モル)を入れ、N-メチル-2-ピロリドンを、仕込みモノマー総質量(ジアミン成分とカルボン酸成分の総和)が 16質量%となる量の2972.56gを加え、室温で1時間攪拌した。この溶液にCpODA 384.38g(1.0モル)を徐々に加えた。室温で12時間撹拌し、均一で粘稠なポリイミド前駆体溶液(ワニスB)を得た。
窒素ガスで置換した反応容器中にDABAN 22.73g(0.100モル)を入れ、N-メチル-2-ピロリドンを、仕込みモノマー総質量(ジアミン成分とカルボン酸成分の総和)が 16質量%となる量の3211.16gを加え、室温で1時間攪拌した。この溶液にCpODA 38.44g(0.100モル)を徐々に加えた。室温で12時間撹拌し、均一で粘稠なポリイミド前駆体溶液(ワニスC)を得た。
窒素ガスで置換した反応容器中にDABAN 15.91g(0.070モル)とPPD 3.24g(0.030モル)を入れ、N-メチル-2-ピロリドンを、仕込みモノマー総質量(ジアミン成分とカルボン酸成分の総和)が 16質量%となる量の302.35gを加え、室温で1時間攪拌した。この溶液にCpODA 38.44g(0.100モル)を徐々に加えた。室温で12時間撹拌し、均一で粘稠なポリイミド前駆体溶液(ワニスD)を得た。
窒素ガスで置換した反応容器中にDABAN 11.36g(0.050モル)とPPD 4.34g(0.040モル)と4,4’-ODA 2.00g(0.010モル)を入れ、N-メチル-2-ピロリドンを、仕込みモノマー総質量(ジアミン成分とカルボン酸成分の総和)が 16質量%となる量の294.74gを加え、室温で1時間攪拌した。この溶液にCpODA 38.44g(0.100モル)を徐々に加えた。室温で12時間撹拌し、均一で粘稠なポリイミド前駆体溶液(ワニスE)を得た。
窒素ガスで置換した反応容器中に4,4’-ODA 20.02g(0.100モル)を入れ、N-メチル-2-ピロリドンを、仕込みモノマー総質量(ジアミン成分とカルボン酸成分の総和)が 17質量%となる量の207.21gを加え、室温で1時間攪拌した。この溶液にPMDA-HS 22.41g(0.100ミリモル)を徐々に加えた。室温で12時間撹拌し、均一で粘稠なポリイミド前駆体溶液(ワニスF)を得た。
窒素ガスで置換した反応容器中にDABAN 22.73g(0.100モル)を入れ、N-メチル-2-ピロリドンを、仕込みモノマー総質量(ジアミン成分とカルボン酸成分の総和)が 20質量%となる量の296.29gを加え、室温で1時間攪拌した。この溶液にPACDA 51.35g(0.100モル)を徐々に加えた。室温で12時間撹拌し、均一で粘稠なポリイミド前駆体溶液(ワニスG)を得た。
窒素ガスで置換した反応容器中にtra-DACH 10.81g(0.100モル)を入れ、N-メチル-2-ピロリドンを、仕込みモノマー総質量(ジアミン成分とカルボン酸成分の総和)が 12質量%となる量の2950.64gを加え、室温で1時間攪拌した。この溶液にs-BPDA 28.69g(0.0975モル)とa-BPDA 0.74g(0.0025モル)を徐々に加えた。50℃で12時間撹拌し、均一で粘稠なポリイミド前駆体溶液(ワニスH)を得た。
1,2-ジメチルイミダゾール 0.05g(0.5ミリモル)とN-メチル-2-ピロリドン 0.05gを反応容器に加え均一な溶液を得た。その溶液に合成例1で得られたワニスA 33.76g(ワニスA中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対して、1,2-ジメチルイミダゾールは0.05モルである。
1,2-ジメチルイミダゾール 0.15g(1.6ミリモル)とN-メチル-2-ピロリドン 0.15gを反応容器に加え均一な溶液を得た。その溶液に合成例1で得られたワニスA 33.76g(ワニスA中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対して、1,2-ジメチルイミダゾールは0.16モルである。
1,2-ジメチルイミダゾール 0.19g(2.0ミリモル)とN-メチル-2-ピロリドン 0.19gを反応容器に加え均一な溶液を得た。その溶液に合成例1で得られたワニスA 33.76g(ワニスA中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対して、1,2-ジメチルイミダゾールは0.2モルである。
1,2-ジメチルイミダゾール 0.96g(10.0ミリモル)とN-メチル-2-ピロリドン 0.38gを反応容器に加え均一な溶液を得た。その溶液に合成例1で得られたワニスA 33.76g(ワニスA中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する1,2-ジメチルイミダゾールは1.0モルである。
1,2-ジメチルイミダゾール 1.92g(20.0ミリモル)とN-メチル-2-ピロリドン 0.38gを反応容器に加え均一な溶液を得た。その溶液に合成例1で得られたワニスA 33.76g(ワニスA中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する1,2-ジメチルイミダゾールは2.0モルである。
1-メチルイミダゾール 0.04g(0.5ミリモル)とN-メチル-2-ピロリドン 0.04gを反応容器に加え均一な溶液を得た。その溶液に合成例1で得られたワニスA 33.76g(ワニスA中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する1-メチルイミダゾールは0.05モルである。
1-メチルイミダゾール 0.08g(1.0ミリモル)とN-メチル-2-ピロリドン 0.08gを反応容器に加え均一な溶液を得た。その溶液に合成例1で得られたワニスA 33.76g(ワニスA中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する1-メチルイミダゾールは0.1モルである。
1-メチルイミダゾール 0.16g(2.0ミリモル)とN-メチル-2-ピロリドン 0.16gを反応容器に加え均一な溶液を得た。その溶液に合成例1で得られたワニスA 33.76g(ワニスA中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する1-メチルイミダゾールは0.2モルである。
1-メチルイミダゾール 0.33g(4.0ミリモル)とN-メチル-2-ピロリドン 0.33gを反応容器に加え均一な溶液を得た。その溶液に合成例1で得られたワニスA 33.76g(ワニスA中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する1-メチルイミダゾールは0.4モルである。
2-メチルイミダゾール 0.16g(2.0ミリモル)とN-メチル-2-ピロリドン 0.16gを反応容器に加え均一な溶液を得た。その溶液に合成例1で得られたワニスA 33.76g(ワニスA中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する2-メチルイミダゾールは0.2モルである。
イミダゾール 0.14g(2.0ミリモル)とN-メチル-2-ピロリドン 0.14gを反応容器に加え均一な溶液を得た。その溶液に合成例1で得られたワニスA 33.76g(ワニスA中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する、イミダゾールは0.2モルである。
2-フェニルイミダゾール 0.29g(2.0ミリモル)とN-メチル-2-ピロリドン 0.29gを反応容器に加え均一な溶液を得た。その溶液に合成例1で得られたワニスA 33.76g(ワニスA中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する、2-フェニルイミダゾールは0.2モルである。
ベンゾイミダゾール 0.24g(2.0ミリモル)とN-メチル-2-ピロリドン 0.24gを反応容器に加え均一な溶液を得た。その溶液に合成例1で得られたワニスA 33.76g(ワニスA中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する、ベンゾイミダゾールは0.2モルである。
PTFE製メンブレンフィルターでろ過した合成例1で得られたワニスAをガラス基板に塗布し、窒素雰囲気下(酸素濃度200ppm以下)、そのままガラス基板上で室温から410℃まで加熱して熱的にイミド化を行い、無色透明なポリイミドフィルム/ガラス積層体を得た。次いで、得られたポリイミドフィルム/ガラス積層体を水に浸漬した後剥離し、乾燥して、膜厚が約10μmのポリイミドフィルムを得た。
1,2-ジメチルイミダゾール 1.92g(40.0ミリモル)とN-メチル-2-ピロリドン 0.38gを反応容器に加え均一な溶液を得た。その溶液に合成例1で得られたワニスA 33.76g(ワニスA中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する、1,2-ジメチルイミダゾールは4.0モルである。得られたポリイミド前駆体溶液を23℃で保管すると、3日目までにポリイミド前駆体溶液がゲル化した。
1,2-ジメチルイミダゾール 0.19g(2.0ミリモル)とN-メチル-2-ピロリドン 0.19gを反応容器に加え均一な溶液を得た。その溶液に合成例1で得られたワニスA 33.76g(ワニスA中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する、1,2-ジメチルイミダゾールは0.2モルである。
1,2-ジメチルイミダゾール 0.05g(0.5ミリモル)とN-メチル-2-ピロリドン 0.05gを反応容器に加え均一な溶液を得た。その溶液に合成例2で得られたワニスB 35.39g(ワニスB中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する、1,2-ジメチルイミダゾールは0.05モルである。
1,2-ジメチルイミダゾール 0.10g(1.0ミリモル)とN-メチル-2-ピロリドン 0.10gを反応容器に加え均一な溶液を得た。その溶液に合成例2で得られたワニスB 35.39g(ワニスB中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する、1,2-ジメチルイミダゾールは0.1モルである。
1,2-ジメチルイミダゾール 0.19g(2.0ミリモル)とN-メチル-2-ピロリドン 0.19gを反応容器に加え均一な溶液を得た。その溶液に合成例2で得られたワニスB 35.39g(ワニスB中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する、1,2-ジメチルイミダゾールは0.2モルである。
1-メチルイミダゾール 0.16g(2.0ミリモル)とN-メチル-2-ピロリドン 0.16gを反応容器に加え均一な溶液を得た。その溶液に合成例2で得られたワニスB 35.39g(ワニスB中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する、1-メチルイミダゾールは0.2モルである。
PTFE製メンブレンフィルターでろ過した合成例2で得られたワニスBをガラス基板に塗布し、窒素雰囲気下(酸素濃度200ppm以下)、そのままガラス基板上で室温から410℃まで加熱して熱的にイミド化を行い、無色透明なポリイミドフィルム/ガラス積層体を得た。次いで、得られたポリイミドフィルム/ガラス積層体を水に浸漬した後剥離し、乾燥して、膜厚が約10μmのポリイミドフィルムを得た。
2-エチル-2-イミダゾリン 0.10g(1.0ミリモル)とN-メチル-2-ピロリドン 0.20gを反応容器に加え均一な溶液を得た。その溶液に合成例2で得られたワニスB 35.39g(ワニスB中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する、2-エチル-2-イミダゾリンは0.1モルである。
2-エチル-2-イミダゾリン 0.20g(2.0ミリモル)とN-メチル-2-ピロリドン 0.40gを反応容器に加え均一な溶液を得た。その溶液に合成例2で得られたワニスB 35.39g(ワニスB中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加えるとワニスがゲル化した。そのまま室温で3時間攪拌しても、均一なポリイミド前駆体溶液を得られなかった。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する、2-エチル-2-イミダゾリンは0.2モルである。
2-エチル-2-イミダゾリン 0.49g(5.0ミリモル)とN-メチル-2-ピロリドン 0.98gを反応容器に加え均一な溶液を得た。その溶液に合成例2で得られたワニスB 35.39g(ワニスB中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加えるとワニスがゲル化した。そのまま室温で3時間攪拌しても、均一なポリイミド前駆体溶液を得られなかった。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する、2-エチル-2-イミダゾリンは0.5モルである。
2-メチル-2-イミダゾリン 0.25g(3.0ミリモル)とN-メチル-2-ピロリドン 0.25gを反応容器に加え均一な溶液を得た。その溶液に合成例2で得られたワニスB 35.39g(ワニスB中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する、2-メチル-2-イミダゾリンは0.3モルである。
2-フェニルイミダゾリン 0.44g(3.0ミリモル)とN-メチル-2-ピロリドン 0.44gを反応容器に加え均一な溶液を得た。その溶液に合成例2で得られたワニスB 35.39g(ワニスB中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する、2-フェニルイミダゾリンは0.3モルである。
1,2-ジメチルイミダゾール 0.10g(1.0ミリモル)とN-メチル-2-ピロリドン 0.10gを反応容器に加え均一な溶液を得た。その溶液に合成例3で得られたワニスC 38.23g(ワニスC中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する、1,2-ジメチルイミダゾールは0.1モルである。
PTFE製メンブレンフィルターでろ過した合成例3で得られたワニスCをガラス基板に塗布し、窒素雰囲気下(酸素濃度200ppm以下)、そのままガラス基板上で室温から410℃まで加熱して熱的にイミド化を行い、無色透明なポリイミドフィルム/ガラス積層体を得た。次いで、得られたポリイミドフィルム/ガラス積層体を水に浸漬した後剥離し、乾燥して、膜厚が約10μmのポリイミドフィルムを得た。
1,2-ジメチルイミダゾール 0.10g(1.0ミリモル)とN-メチル-2-ピロリドン 0.10gを反応容器に加え均一な溶液を得た。その溶液に合成例4で得られたワニスD 35.99g(ワニスD中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する、1,2-ジメチルイミダゾールは0.1モルである。
PTFE製メンブレンフィルターでろ過した合成例4で得られたワニスDをガラス基板に塗布し、窒素雰囲気下(酸素濃度200ppm以下)、そのままガラス基板上で室温から410℃まで加熱して熱的にイミド化を行い、無色透明なポリイミドフィルム/ガラス積層体を得た。次いで、得られたポリイミドフィルム/ガラス積層体を水に浸漬した後剥離し、乾燥して、膜厚が約10μmのポリイミドフィルムを得た。
1,2-ジメチルイミダゾール 0.10g(1.0ミリモル)とN-メチル-2-ピロリドン 0.10gを反応容器に加え均一な溶液を得た。その溶液に合成例5で得られたワニスE 35.09g(ワニスE中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する、1,2-ジメチルイミダゾールは0.1モルである。
PTFE製メンブレンフィルターでろ過した合成例5で得られたワニスEをガラス基板に塗布し、窒素雰囲気下(酸素濃度200ppm以下)、そのままガラス基板上で室温から410℃まで加熱して熱的にイミド化を行い、無色透明なポリイミドフィルム/ガラス積層体を得た。次いで、得られたポリイミドフィルム/ガラス積層体を水に浸漬した後剥離し、乾燥して、膜厚が約10μmのポリイミドフィルムを得た。
1,2-ジメチルイミダゾール 0.19g(2.0ミリモル)とN-メチル-2-ピロリドン 0.19gを反応容器に加え均一な溶液を得た。その溶液に合成例6で得られたワニスF 24.97g(ワニスF中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する、1,2-ジメチルイミダゾールは0.2モルである。
PTFE製メンブレンフィルターでろ過した合成例6で得られたワニスFをガラス基板に塗布し、窒素雰囲気下(酸素濃度200ppm以下)、そのままガラス基板上で室温から400℃まで加熱して熱的にイミド化を行い、無色透明なポリイミドフィルム/ガラス積層体を得た。次いで、得られたポリイミドフィルム/ガラス積層体を水に浸漬した後剥離し、乾燥して、膜厚が約10μmのポリイミドフィルムを得た。
1,2-ジメチルイミダゾール 0.19g(2.0ミリモル)とN-メチル-2-ピロリドン 0.19gを反応容器に加え均一な溶液を得た。その溶液に合成例7で得られたワニスG 37.04g(ワニスG中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する、1,2-ジメチルイミダゾールは0.2モルである。
PTFE製メンブレンフィルターでろ過した合成例7で得られたワニスGをガラス基板に塗布し、窒素雰囲気下(酸素濃度200ppm以下)、そのままガラス基板上で室温から350℃まで加熱して熱的にイミド化を行い、無色透明なポリイミドフィルム/ガラス積層体を得た。次いで、得られたポリイミドフィルム/ガラス積層体を水に浸漬した後剥離し、乾燥して、膜厚が約10μmのポリイミドフィルムを得た。
1,2-ジメチルイミダゾール 0.19g(2.0ミリモル)とN-メチル-2-ピロリドン 0.19gを反応容器に加え均一な溶液を得た。その溶液に合成例8で得られたワニスH 33.53g(ワニスH中のポリイミド前駆体の繰返しユニットの分子量に対して、10ミリモル)加え、室温で3時間攪拌し、均一で粘稠なポリイミド前駆体溶液を得た。仕込み量から計算すると、ポリイミド前駆体の繰り返し単位1モルに対する、1,2-ジメチルイミダゾールは0.2モルである。
PTFE製メンブレンフィルターでろ過した合成例8で得られたワニスHをガラス基板に塗布し、窒素雰囲気下(酸素濃度200ppm以下)、そのままガラス基板上で室温から370℃まで加熱して熱的にイミド化を行い、無色透明なポリイミドフィルム/ガラス積層体を得た。次いで、得られたポリイミドフィルム/ガラス積層体を水に浸漬した後剥離し、乾燥して、膜厚が約10μmのポリイミドフィルムを得た。
Claims (12)
- 下記化学式(1)で表される繰り返し単位、または下記化学式(2)で表される繰り返し単位を含むポリイミド前駆体と、
イミダゾール系化合物を含み、
イミダゾール系化合物の含有量が、ポリイミド前駆体の繰り返し単位1モルに対して4モル未満であることを特徴とするポリイミド前駆体組成物。
- このポリイミド前駆体組成物から得られるポリイミドが、厚さ10μmのフィルムでの波長400nmの光透過率が75%以上であることを特徴とする請求項1に記載のポリイミド前駆体組成物。
- 前記イミダゾール系化合物の含有量が、ポリイミド前駆体の繰り返し単位1モルに対して0.05モル以上2モル以下であることを特徴とする請求項1又は2に記載のポリイミド前駆体組成物。
- 前記イミダゾール系化合物の1気圧における沸点が340℃未満であることを特徴とする請求項1~3のいずれかに記載のポリイミド前駆体組成物。
- 前記イミダゾール系化合物が、1,2-ジメチルイミダゾール、1-メチルイミダゾール、2-メチルイミダゾール、2-フェニルイミダゾール、イミダゾール、またはベンゾイミダゾールのいずれかであることを特徴とする請求項1~4のいずれかに記載のポリイミド前駆体組成物。
- 請求項1~5のいずれかに記載のポリイミド前駆体組成物を、最高加熱温度350℃超で加熱処理して、ポリイミド前駆体をイミド化することを特徴とするポリイミドの製造方法。
- 請求項1~5のいずれかに記載のポリイミド前駆体組成物を基材上に塗布する工程と、
基材上のポリイミド前駆体組成物を、最高加熱温度350℃超で加熱処理して、ポリイミド前駆体をイミド化する工程と
を有することを特徴とする請求項6に記載のポリイミドの製造方法。 - 前記加熱処理の最高加熱温度が400℃を超えることを特徴とする請求項6又は7に記載のポリイミドの製造方法。
- 請求項6~8のいずれかに記載の方法により製造されるポリイミド。
- 厚さ10μmのフィルムでの波長400nmの光透過率が75%以上であることを特徴とする請求項9に記載のポリイミド。
- 請求項6~8のいずれかに記載の方法により製造されるポリイミドフィルム。
- 請求項9又は10に記載のポリイミド、又は請求項11に記載のポリイミドフィルムを含むことを特徴とするディスプレイ用、タッチパネル用、または太陽電池用の基板。
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KR102281153B1 (ko) | 2021-07-22 |
JP6721070B2 (ja) | 2020-07-08 |
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CN105764991A (zh) | 2016-07-13 |
TWI658069B (zh) | 2019-05-01 |
KR20160091936A (ko) | 2016-08-03 |
JP2019108552A (ja) | 2019-07-04 |
CN109535423A (zh) | 2019-03-29 |
KR102257869B1 (ko) | 2021-05-27 |
JPWO2015080158A1 (ja) | 2017-03-16 |
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