WO2014142173A1 - 絶縁被覆層の製造方法 - Google Patents
絶縁被覆層の製造方法 Download PDFInfo
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- WO2014142173A1 WO2014142173A1 PCT/JP2014/056504 JP2014056504W WO2014142173A1 WO 2014142173 A1 WO2014142173 A1 WO 2014142173A1 JP 2014056504 W JP2014056504 W JP 2014056504W WO 2014142173 A1 WO2014142173 A1 WO 2014142173A1
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- coating layer
- polyimide precursor
- insulating coating
- precursor composition
- polyimide
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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
-
- 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
- C08G73/1046—Polyimides containing oxygen in the form of ether bonds in the main chain
-
- 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
- C08G73/1067—Wholly aromatic polyimides, i.e. having both tetracarboxylic and diamino moieties aromatically bound
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B3/00—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
- H01B3/18—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
- H01B3/30—Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
- H01B3/303—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 H01B3/38 or H01B3/302
- H01B3/306—Polyimides or polyesterimides
Definitions
- the present invention relates to a method for producing an insulating coating layer, which can efficiently produce a polyimide insulating coating layer having excellent heat resistance in a short time.
- Polyimide resin is known as a resin excellent in heat resistance and is widely used in various fields. For example, in addition to high heat resistance, it has a low dielectric constant and excellent mechanical properties, so it is used as an insulating layer for electric wires with high required properties.
- Patent Document 1 discloses an insulating layer characterized in that an insulating layer obtained by imidizing polyamic acid obtained by reaction of biphenyltetracarboxylic dianhydride and 4,4′-diaminodiphenyl ether is provided on a core wire. A covered electric wire is described, and it is described that this polyimide insulating covered electric wire has excellent resistance to thermal deterioration.
- Patent Document 2 discloses an insulating polyimide precursor varnish characterized by containing 0.1 to 60% by weight of a basic substance such as an amine compound with respect to a polyimide precursor, specifically, an alkyl ester of polyamic acid. Is described.
- the basic substance since the basic substance has the effect of suppressing the reaction between the polyimide precursor varnish and copper, the copper atom content of the polyimide thermally imidized on copper is extremely reduced, and thus the characteristics of the polyimide are degraded. It is described that the long-term reliability of an electronic device such as an LSI having a copper / polyimide thin-film multilayer wiring or a copper / polyimide wiring using this as an insulating layer can be improved.
- Patent Document 3 discloses a polyamic acid obtained by reacting tetracarboxylic dianhydride with a diamine having a solubility in water at 25 ° C. of 0.1 g / L or more, such as 3,3 ′, 4,4 ′.
- a polyamic acid obtained by reacting -biphenyltetracarboxylic dianhydride with p-phenylenediamine or 4,4'-diaminodiphenyl ether has two or more substituents such as 1,2-dimethylimidazole.
- a polyimide precursor aqueous solution composition characterized by being dissolved together with an imidazole having an alkyl group in an aqueous solvent or an aqueous solvent that is a mixture of water and an organic solvent having a water ratio of 50% by mass or more. are listed.
- the polyimide may become crystalline depending on the combination of the tetracarboxylic acid component and the diamine component, and as a result, the conditions for imidizing the polyamic acid that is the polyimide precursor may be limited.
- the conditions for imidizing the polyamic acid that is the polyimide precursor may be limited.
- 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride is used as the tetracarboxylic acid component, a crystalline polyimide resin can be easily obtained, and depending on imidization conditions, particularly rapid If imidization is attempted by a short heat treatment by increasing the temperature, partial crystallization is likely to occur.
- productivity is increased by increasing the temperature rise rate. In some cases, it could not be increased.
- the present invention relates to a method for producing a polyimide insulation coating layer in which a polyamic acid using 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride as a tetracarboxylic acid component is imidized to form a polyimide insulation coating layer
- the purpose of the present invention is to provide a method capable of forming a polyimide insulating coating layer without defects even when a rapid temperature rise is performed. That is, an object of the present invention is to provide an industrially advantageous method capable of forming a polyimide resin insulating coating layer excellent in heat resistance and mechanical properties in a short time without causing crystallization.
- a method for producing a polyimide insulating coating layer comprising a step of applying and baking a polyimide precursor composition on a substrate,
- the polyimide precursor composition includes a polyamic acid comprising a repeating unit represented by the following chemical formula (1), a basic compound selected from the group consisting of imidazoles and amine compounds,
- the time for heating the polyimide precursor composition is 10 to 180 seconds,
- the average rate of temperature increase from 100 ° C. to 280 ° C. is 5 ° C./s or more
- a method for producing an insulating coating layer, wherein the maximum heating temperature is 300 to 500 ° C.
- A is a tetravalent organic group, 50 to 100 mol% of A is a tetravalent group represented by the following chemical formula (2), and B is a divalent organic group.
- Item 2 The method for producing an insulating coating layer according to Item 1, wherein the polyimide precursor composition contains, as a basic compound, an imidazole having two or more alkyl groups as a substituent.
- the imidazole is an imidazole selected from the group consisting of 1,2-dimethylimidazole, 2-ethyl-4-methylimidazole, 4-ethyl-2-methylimidazole, and 1-methyl-4-ethylimidazole.
- Item 3 The method for manufacturing an insulating coating layer according to Item 2, wherein: 4). Item 4.
- the amine compound is selected from the group consisting of trimethylamine, diethylamine, dimethylethylamine, triethylamine, N-propylethylamine, N-butylethylamine, N, N-dimethylcyclohexylamine, and 1,4-diazabicyclo [2,2,2] octane Item 5.
- the method for producing an insulating coating layer according to Item 4 wherein the compound is an insulating compound.
- the present invention it is possible to provide an industrially advantageous method capable of forming an insulating coating layer of polyimide resin having excellent heat resistance and mechanical properties in a short time without causing crystallization.
- the method for producing a polyimide insulating coating layer of the present invention can be suitably applied particularly to the production of insulated wires, has excellent heat resistance, and efficiently produces highly reliable insulated wires having no defects in the insulating coating layer. can do.
- This invention is a manufacturing method of the polyimide insulation coating layer which apply
- a polyimide precursor composition is the said Chemical formula (1). ), And a specific basic compound.
- the time for heating the polyimide precursor composition is 10 to 180 seconds, and the average temperature increase rate from 100 ° C. to 280 ° C. In this process, the temperature is raised under the condition of 5 ° C./s or more, and the maximum heating temperature is 300 to 500 ° C.
- the polyamic acid used in the present invention is composed of a repeating unit represented by the chemical formula (1), and a tetracarboxylic dianhydride and a diamine are mixed in a solvent, for example, water or an organic solvent, or water and an organic solvent. It can be obtained by reacting in a mixed solvent.
- a solvent for example, water or an organic solvent, or water and an organic solvent. It can be obtained by reacting in a mixed solvent.
- A is a tetravalent organic group
- A is a tetravalent group derived from tetracarboxylic dianhydride (a tetravalent unit obtained by removing a carboxyl group from tetracarboxylic acid).
- 50 to 100 mol% of A is a tetravalent group represented by the above chemical formula (2), which is a tetravalent unit obtained by removing a carboxyl group from 3,3 ′, 4,4′-biphenyltetracarboxylic acid.
- B is a divalent organic group
- B is a divalent group derived from a diamine compound (a divalent unit obtained by removing an amino group from a diamine compound).
- the tetracarboxylic dianhydride used in the present invention is 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride as a main component, that is, 50 to 100 mol%, more preferably 70 to 100 mol%. is there.
- 3,3 ', 4,4'-biphenyltetracarboxylic dianhydride is preferably used as a main component from the viewpoint of heat resistance and mechanical properties.
- the polyimide layer can be formed without causing crystallization even when the temperature is rapidly increased.
- a tetracarboxylic acid component (tetracarboxylic dianhydride) other than 3,3 ', 4,4'-biphenyltetracarboxylic dianhydride may be used in a range of less than 50 mol%.
- the tetracarboxylic dianhydride that can be used in combination with 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride in the present invention is not particularly limited. Group tetracarboxylic dianhydrides and alicyclic tetracarboxylic dianhydrides are preferred.
- a tetracarboxylic acid component other than 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride is used, in particular, 4,4′-oxydiphthalic dianhydride, 2, It is particularly preferable to use at least one of 3,3 ′, 4′-biphenyltetracarboxylic dianhydride and pyromellitic dianhydride.
- the tetracarboxylic dianhydride described above need not be one kind, and may be a mixture of plural kinds.
- the diamine that can be used in the present invention is not particularly limited, but 4,4′-diaminodiphenyl ether, 4,4′-diaminodiphenylmethane, 3,3′-diaminodiphenylmethane, and 3,3′-dichlorobenzidine.
- 3-methylheptamethylenediamine, , 11-diamino dodecane, 1,12-diamino-octadecane is more preferable.
- the polyamic acid used in the present invention is particularly preferably a polyamic acid composed of a repeating unit represented by the following chemical formula (1 ').
- A is a tetravalent organic group, and 50 to 100 mol%, preferably 70 to 100 mol% of A is a tetravalent group (unit) represented by the following chemical formula (2).
- B is a divalent group (unit) represented by the following chemical formula (3) and / or a divalent group (unit) represented by the following chemical formula (4).
- the basic compound used in the present invention forms a salt with a polyamic acid carboxyl group to enhance the solubility of the polyamic acid in a solvent, and specifically comprises an imidazole (compound) and an amine compound.
- the basic compound (imidazoles, amine compound) to be used may be one kind or a mixture of plural kinds.
- the imidazoles are not particularly limited, but preferred examples include compounds represented by the following chemical formula (5).
- X 1 to X 4 are each independently a hydrogen atom or an alkyl group having 1 to 5 carbon atoms.
- the imidazoles used in the present invention preferably have a solubility in water at 25 ° C. of 0.1 g / L or more, particularly 1 g / L or more.
- X 1 to X 4 are each independently a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and at least two of X 1 to X 4 are More preferred are imidazoles which are alkyl groups having 1 to 5 carbon atoms, that is, imidazoles having two or more alkyl groups as substituents.
- imidazoles having two or more alkyl groups as a substituent examples include 1,2-dimethylimidazole (solubility in water at 25 ° C. is 239 g / L, and the same hereinafter), 2-ethyl-4-methylimidazole (1000 g / L ), 4-ethyl-2-methylimidazole (1000 g / L), and 1-methyl-4-ethylimidazole (54 g / L). Since imidazoles having two or more alkyl groups as substituents are highly soluble in water, using them makes it easy to produce a polyimide precursor composition using water or a mixed solvent of water and an organic solvent as a solvent. can do. Also in the case of a polyimide precursor composition in which the solvent is an organic solvent, the imidazoles as described above can be preferably used.
- the solubility in water at 25 ° C. means the limit amount (g) at which the substance is soluble in 1 L (liter) of water at 25 ° C.
- This value can be easily searched by SciFinder (registered trademark) known as a search service based on a database such as a chemical abstract.
- SciFinder registered trademark
- imidazoles are not only to form a salt with a carboxyl group of polyamic acid to enhance solubility in a solvent, but also to imidize polyamic acid (dehydration ring closure) into a polyimide, which is extremely high in catalytic activity. It has an action.
- Preferred examples of the amine compound include compounds having at least one primary to tertiary amino group in the molecule (hereinafter referred to as primary to tertiary amines).
- a primary to tertiary amino group means a structure in which all three bonds to the central nitrogen atom are single bonds. However, if all three bonds to the central nitrogen atom are single bonds, they may be cyclic amines containing nitrogen atoms in the ring, such as piperazine, piperidine, pyrrolidine, diazabicyclooctane.
- the other nitrogen atom may be a primary to tertiary amino group.
- You may comprise the imino group which has a double bond.
- it is preferable not to be adjacent to the nitrogen atom of the amino group.
- an aliphatic amine is preferable, and the hydrocarbon group of the aliphatic amine is a chain (branched, straight chain) (that is, a branched or straight chain hydrocarbon group is bonded to a nitrogen atom).
- a cyclic that is, a primary or tertiary amine in which a cyclic hydrocarbon group or a hydrocarbon group containing an aliphatic ring is bonded to a nitrogen atom.
- the cyclic amine which contains a nitrogen atom in a ring may be sufficient. In the case of a cyclic amine, a saturated ring is preferable.
- an aliphatic amine When it is not a cyclic amine, it may have an unsaturated group such as an imino group together with an amino group.
- the hydrocarbon group portion of an aliphatic amine (including a cyclic amine containing a nitrogen atom in the ring) may be substituted with —OH, an amino group, —COOH or the like.
- —CH 2 — in the aliphatic group may be replaced by —O—, and at this time, it is preferable that the oxygen atom (O) is not adjacent to the nitrogen atom of the amino group.
- the piperazine is preferably piperazine which is unsubstituted or substituted with an alkyl group (preferably an alkyl group having 1 to 6 carbon atoms, more preferably an alkyl group having 1 to 3 carbon atoms), wherein the alkyl group further comprises an amino group. You may have.
- the substitution position of the alkyl group may be any position in the piperazine ring, and may be on a nitrogen atom or on a carbon atom.
- piperazine 1-methylpiperazine, 1-ethylpiperazine, 1-propylpiperazine, 1,4-dimethylpiperazine, 1,4-diethylpiperazine, 1,4-dipropylpiperazine, 2-methylpiperazine, 2 -Ethylpiperazine, 3-propylpiperazine, 2,6-dimethylpiperazine, 2,6-diethylpiperazine, 2,6-dipropylpiperazine, 2,5-dimethylpiperazine, 2,5-diethylpiperazine, 2,5-di And propylpiperazine.
- Piperazine substituted with an aminoalkyl group such as 1-aminoethylpiperazine is also preferred.
- guanidine and guanidine salts examples include guanidine, salts of weak acids and guanidine carbonate, guanidine oxalate, and guanidine acetate.
- Alkylamines include alkyl groups present independently of one another of a branched or straight chain alkyl group having 1 to 6 carbon atoms, particularly 1 to 4 carbon atoms, or an alicyclic group having 3 to 6 carbon atoms, particularly 6 carbon atoms.
- a primary to tertiary amine having an alkyl group is preferred, and more preferred is an alkyl group so that the total number of carbon atoms in the molecule is 9 or less (that is, the total number of carbon atoms of 1 to 3 alkyl groups in the molecule). 1 to tertiary amines are preferred.
- Specific examples include trimethylamine, diethylamine, dimethylethylamine, triethylamine, N-propylethylamine, N-butylethylamine, N, N-dimethylcyclohexylamine and the like.
- the alkyl group may be substituted with an amino group, and in that case, it contains two or more primary to tertiary amino groups.
- alkyl amines include di- or triamines such as ethylenediamine and diethylenediaminetriamine.
- amino group-containing alcohols include those in which the alkyl group of the alkylamine as described above is substituted with a hydroxyl group (—OH).
- Specific examples include N, N-dimethylethanolamine, N, N-diethylethanolamine, N, N-dibutylethanolamine, and N-methyldiethanolamine.
- carboxyl-substituted alkylamines include those in which the alkyl group of the alkylamine as described above is substituted with a carboxyl group (—COOH). Specifically, various amino acids can be mentioned.
- the piperidine is preferably piperidine which is unsubstituted or substituted with an alkyl group (preferably an alkyl group having 1 to 6 carbon atoms, more preferably an alkyl group having 1 to 3 carbon atoms), wherein the alkyl group further comprises an amino group. You may have.
- the substitution position of the alkyl group may be any position in the piperidine ring, and may be on a nitrogen atom or on a carbon atom.
- the pyrrolidines are preferably pyrrolidines that are unsubstituted or substituted with an alkyl group (preferably an alkyl group having 1 to 6 carbon atoms, more preferably an alkyl group having 1 to 3 carbon atoms), wherein the alkyl group further includes an amino group. You may have.
- the substitution position of the alkyl group may be any position in the pyrrolidine ring, and may be on a nitrogen atom or a carbon atom.
- the diazabicyclooctanes are preferably diazabicyclooctane which is unsubstituted or substituted with an alkyl group (preferably an alkyl group having 1 to 6 carbon atoms, more preferably an alkyl group having 1 to 3 carbon atoms). May further have an amino group.
- the substitution position of the alkyl group may be any position in the diazabicyclooctane ring, and may be on a nitrogen atom or a carbon atom. Specific examples include 1,4-diazabicyclo [2,2,2] octane.
- the polyamic acid used in the present invention reacts with an approximately equimolar amount of tetracarboxylic dianhydride and diamine in a solvent at a relatively low temperature of 100 ° C. or lower, preferably 80 ° C. or lower in order to suppress the imidization reaction. By making it, it can be obtained as a polyamic acid solution.
- the reaction temperature is usually 25 ° C. to 100 ° C., preferably 40 ° C. to 80 ° C., more preferably 50 ° C. to 80 ° C.
- the reaction time is about 0.1 to 24 hours, preferably About 2 to 12 hours.
- the reaction can be carried out in an air atmosphere, but is usually suitably carried out in an inert gas, preferably a nitrogen gas atmosphere.
- the approximately equimolar tetracarboxylic dianhydride and diamine are specifically about 0.90 to 1.10, preferably 0.95 to about their molar ratio [tetracarboxylic dianhydride / diamine]. It is about 1.05.
- the solvent used in the present invention may be any solvent as long as it can polymerize polyamic acid, and may be an aqueous solvent or an organic solvent.
- the solvent may be a mixture of two or more, and a mixed solvent of two or more organic solvents or a mixed solvent of water and one or more organic solvents can also be suitably used.
- the organic solvent that can be used in the present invention is not particularly limited.
- the solvent used for this reaction can be a solvent contained in the polyimide precursor composition of the present invention.
- the polyamic acid used in the present invention is not limited, but the logarithmic viscosity measured at a temperature of 30 ° C. and a concentration of 0.5 g / 100 mL is 0.2 or more, preferably 0.4 or more, particularly preferably 0.6 or more. Is preferred. When the logarithmic viscosity is lower than the above range, it may be difficult to obtain a polyimide having high characteristics because the molecular weight of the polyamic acid is low.
- the polyimide precursor composition used in the present invention is obtained by uniformly mixing a polyamic acid and a basic compound (imidazoles, amine compound) in a solvent.
- the polyimide precursor composition of the present invention can be prepared by adding a basic compound to a polyamic acid solution obtained by reacting tetracarboxylic dianhydride and diamine in a solvent and mixing them uniformly. it can.
- the polyimide precursor composition of the present invention containing a basic compound and a polyamic acid may be prepared by reacting a tetracarboxylic dianhydride and a diamine in a solvent in the presence of a basic compound.
- the basic compound may be added to the system from the time of preparation of the polyamic acid, after the preparation, or at any time before the preparation of the insulating coating layer.
- the amount of the basic compound used in the case of using the organic solvent is 0.1 times equivalent or more, preferably 0.2 times equivalent or more, particularly 0.25 times equivalent, relative to the number of moles of the carboxyl group of the polyamic acid.
- the above is preferable. That is, it is the solubility of polyamic acid that uses a basic compound 0.2 times equivalent or more, preferably 0.4 times equivalent or more, particularly 0.5 times equivalent or more with respect to tetracarboxylic dianhydride. From the point of view, it is preferable.
- the amount of the basic compound used in the case of using a water solvent or a mixed solvent of water and an organic solvent is 0.8 times equivalent or more, preferably 1.0 times the number of moles of the carboxyl group of the polyamic acid. It is preferable that the amount is equal to or greater than 1.2 times, particularly 1.2 times equal or greater. That is, it is the solubility of polyamic acid that the basic compound is used 1.6 times equivalent or more, preferably 2.0 times equivalent or more, particularly 2.4 times equivalent or more with respect to tetracarboxylic dianhydride. From the point of view, it is preferable.
- the upper limit of the amount of the basic compound used is not particularly limited, but it is usually less than 50 parts by weight, preferably 30 parts by weight, regardless of whether an organic solvent is used, an aqueous solvent, or a mixed solvent of water and an organic solvent. Less than, more preferably less than 20 parts by weight is preferable. If the amount of the basic compound used is too large, it becomes uneconomical and the storage stability of the polyimide precursor composition may be deteriorated.
- the polyimide precursor composition used in the present invention is not limited in the solid content concentration due to the polyamic acid, but is preferably 5% by mass to 45% by mass, more preferably based on the total amount of the polyamic acid and the solvent.
- the content is preferably 5% by mass to 40% by mass, more preferably more than 5% by mass and 30% by mass.
- the solution viscosity at 30 ° C. of the polyimide precursor composition used in the present invention is not limited, but is preferably 1000 Pa ⁇ sec or less, more preferably 0.5 to 500 Pa ⁇ sec, still more preferably 1 to 300 Pa ⁇ sec, Particularly preferably, the pressure is 2 to 200 Pa ⁇ sec.
- the polyimide precursor composition used in the present invention may contain other additive components in addition to the polyamic acid, the basic compound (imidazoles, amine compound) and the solvent, if necessary.
- the polyimide precursor composition is converted into polyimide by removing the solvent by heat treatment and imidizing (dehydrating ring closure).
- a polyimide insulating coating layer is obtained. Therefore, it is possible to employ a process of raising the temperature in a short time and baking at a high temperature.
- the polyimide precursor composition as described above is applied to a substrate by a known method, and heated (baked) to form a polyimide insulating coating layer.
- the time for heating the polyimide precursor composition is 10 to 180 seconds, and the average temperature increase rate from 100 ° C. to 280 ° C. is 5
- the maximum heating temperature can be 300 to 500 ° C.
- the upper limit of the average rate of temperature increase from 100 ° C. to 280 ° C. is not particularly limited, but for example, 50 ° C./s or less is preferable.
- the average rate of temperature increase from 100 ° C. to 300 ° C. may be 5 ° C./s or more (ie, from 100 ° C. to 300 ° C. within 40 seconds).
- the average rate of temperature increase up to 500 ° C. may be 5 ° C./s or more.
- the average temperature rising rate up to 100 ° C. is not particularly limited, but may be 5 ° C./s or more.
- the temperature is increased from room temperature to the maximum heating temperature.
- the temperature may be raised at a constant rate of temperature rise, the rate of temperature rise may be changed during the heat treatment, and the temperature may be raised stepwise.
- the heat treatment for imidization can be performed, for example, in an air atmosphere or an inert gas atmosphere.
- a base material is not specifically limited, According to a use, it selects suitably.
- the thickness of the polyimide insulating coating layer to be formed is not particularly limited, and is appropriately selected according to the application.
- the polyimide insulating coating layer obtained by the present invention is an insulating member (coating layer) having high voltage resistance, heat resistance, and moist heat resistance. Therefore, it can be particularly suitably used in the fields of electric / electronic parts, the automobile field, the aerospace field, etc., and can also be used in the fields of coils for HV car motors and micro motors.
- Solid content concentration [% by mass] (w 2 / w 1 ) ⁇ 100 ⁇ Logarithmic viscosity>
- the sample solution was diluted to a concentration of 0.5 g / dl based on the solid content concentration (solvent is water or N-methyl-2-pyrrolidone). This diluted solution was added to Cannon Fenceke No.
- the flow-down time (T 1 ) was measured using 100.
- the logarithmic viscosity was calculated from the following equation using the flow time (T 0 ) of blank water.
- Example 1 To a 500 mL glass reaction vessel equipped with a stirrer and a nitrogen gas inlet / outlet tube, 396 g of NMP was added as a solvent, 40.05 g (0.20 mol) of ODA was added thereto, and 50 ° C. for 1 hour. Stir and dissolve. To this solution, 58.84 g (0.20 mol) of s-BPDA was added and stirred at 50 ° C. for 3 hours. The solid content concentration was 18.5% by mass, the solution viscosity was 5.0 Pa ⁇ s, and the logarithmic viscosity was 0.68. The polyimide precursor was obtained. To this polyimide precursor, 14.83 g (0.15 mol, 0.75 times equivalent of tetracarboxylic acid component) of 1,2-DMZ was added to obtain a polyimide precursor composition.
- This polyimide precursor composition was coated on 18 ⁇ m copper foil (manufactured by Mitsui Metal Mining Co., Ltd., 3EC-VLP).
- the obtained sample was placed on a SUS plate previously heated to 350 ° C. and held for 1 minute to form an insulating coating layer.
- the sample temperature was raised from 100 ° C. to 280 ° C. for 25 seconds (temperature increase rate: 7.2 ° C./s).
- the insulating coating layer was similarly produced using the SUS board heated at 380 degreeC. In this case, the sample temperature was raised from 100 ° C. to 280 ° C. for 12 seconds (heating rate 15 ° C./s).
- Table 1 the results of state observation and property evaluation are shown in Table 1.
- Example 2 An insulating coating layer was produced on the polyimide film in the same manner as in Example 1 except that the polyimide precursor composition was coated on a polyimide film having a thickness of 50 ⁇ m. The results are shown in Table 1.
- Example 3 A polyimide precursor composition was prepared in the same manner as in Example 1 except that 14.83 g of DABCO (0.13 mol, 0.66 times equivalent of tetracarboxylic acid component) was used instead of 1,2-DMZ. The insulating coating layer was prepared on the polyimide film in the same manner as in Example 2 using this. The results are shown in Table 1.
- Example 4 359 g of NMP was added as a solvent to a glass reaction vessel having an internal volume of 500 mL equipped with a stirrer and a nitrogen gas introduction / discharge tube, and 20.02 g (0.10 mol) of ODA and 10.81 g of PPD ( 0.10 mol) was added and stirred at 50 ° C. for 1 hour to dissolve. To this solution, 58.84 g (0.20 mol) of s-BPDA was added and stirred at 50 ° C. for 3 hours to obtain a solid content concentration of 18.4% by mass, a solution viscosity of 9.5 Pa ⁇ s, and a logarithmic viscosity of 0.69. The polyimide precursor was obtained. To this polyimide precursor, 13.45 g (0.14 mol, 0.70 times equivalent of tetracarboxylic acid component) of 1,2-DMZ was added to obtain a polyimide precursor composition.
- Example 5 To a glass reaction vessel having an internal volume of 500 mL equipped with a stirrer and a nitrogen gas introduction / discharge tube, 377 g of NMP was added as a solvent, to which 28.03 g (0.14 mol) of ODA and 6.49 g of PPD ( 0.06 mol) was added and stirred at 50 ° C. for 1 hour to dissolve. To this solution, 41.19 g (0.14 mol) of s-BPDA and 18.61 g (0.06 mol) of ODPA were added and stirred at 50 ° C. for 3 hours to obtain a solid content concentration of 18.5% by mass.
- a polyimide precursor having a viscosity of 5.1 Pa ⁇ s and a logarithmic viscosity of 0.68 was obtained.
- 14.15 g of 1,2-DMZ (0.15 mol, 0.74 times equivalent of tetracarboxylic acid component) was added to obtain a polyimide precursor composition.
- Example 6 421 g of water as a solvent was added to a 500 mL glass reaction vessel equipped with a stirrer and a nitrogen gas inlet / outlet tube, and 20.02 g (0.10 mol) of ODA and 1,2-DMZ were added thereto. 24.03 g (0.25 mol, 2.5 times the amount of the tetracarboxylic acid component) was added and stirred at 25 ° C. for 1 hour to dissolve. To this solution, 29.42 g (0.10 mol) of s-BPDA was added and stirred at 70 ° C. for 4 hours to obtain a polyimide having a solid content concentration of 9.3% by mass, a solution viscosity of 32 Pa ⁇ s, and a logarithmic viscosity of 0.42. A precursor composition was obtained.
- Example 7 406 g of water as a solvent was added to a 500 mL glass reaction vessel equipped with a stirrer and a nitrogen gas inlet / outlet tube, and 12.97 g (0.12 mol) of PPD and 1,2-DMZ 28.84 g (0.30 mol, 2.5 times equivalent of tetracarboxylic acid component) was added and stirred at 25 ° C. for 1 hour to dissolve.
- 35.31 g (0.12 mol) of s-BPDA was added and stirred at 70 ° C. for 4 hours to obtain a polyimide having a solid content concentration of 9.1 mass%, a solution viscosity of 63 Pa ⁇ s, and a logarithmic viscosity of 1.86.
- a precursor composition was obtained.
- Example 8 400 g of water as a solvent was added to a glass reaction vessel having an internal volume of 500 mL equipped with a stirrer and a nitrogen gas introduction / discharge tube, and 14.02 g (0.07 mol) of ODA and 3.24 g of PPD (this was added) 0.03 mol) and 24.03 g of 1,2-DMZ (0.25 mol, 2.5 times equivalent of tetracarboxylic acid component) were added and stirred at 25 ° C. for 1 hour to dissolve. To this solution, 20.60 g (0.07 mol) of s-BPDA and 9.31 g (0.03 mol) of ODPA were added and stirred at 70 ° C. for 4 hours to obtain a solid content concentration of 9.2% by mass. A polyimide precursor composition having a viscosity of 52 Pa ⁇ s and a logarithmic viscosity of 0.46 was obtained.
- Example 9 To a glass reaction vessel having an internal volume of 500 mL equipped with a stirrer and a nitrogen gas inlet / outlet tube, 103 g of water was added as a solvent, and 14.02 g (0.07 mol) of ODA and 3.24 g of PPD ( 0.03 mol) and 38.45 g (0.40 mol, 4.0 times equivalent of tetracarboxylic acid component) of 1,2-DMZ were added and stirred at 25 ° C. for 1 hour to dissolve. To this solution, 20.60 g (0.07 mol) of s-BPDA and 9.31 g (0.03 mol) of ODPA were added and stirred at 70 ° C. for 4 hours to obtain a solid content concentration of 23.1% by mass. A polyimide precursor composition having a viscosity of 3.5 Pa ⁇ s and a logarithmic viscosity of 0.25 was obtained.
- This polyimide precursor composition was coated on a polyimide film having a thickness of 50 ⁇ m.
- the obtained sample was placed on a SUS plate previously heated to 350 ° C. and held for 1 minute to form an insulating coating layer.
- the sample temperature was raised from 100 ° C. to 280 ° C. for 25 seconds (temperature increase rate: 7.2 ° C./s).
- the insulating coating layer was similarly produced using the SUS board heated at 380 degreeC. In this case, the sample temperature was raised from 100 ° C. to 280 ° C. for 12 seconds (heating rate 15 ° C./s).
- Table 2 the results of state observation and property evaluation are shown in Table 2.
- Example 10 To a glass reaction vessel having an internal volume of 500 mL equipped with a stirrer and a nitrogen gas introduction / discharge tube, 98 g of water and 5.0 g of NMP were added as solvents, and 14.02 g (0.07 mol) of ODA was added thereto. Add 3.24 g (0.03 mol) of PPD and 38.45 g (0.40 mol, 4.0 times equivalent of tetracarboxylic acid component) of 1,2-DMZ and stir at 25 ° C. for 1 hour. And dissolved. To this solution, 20.60 g (0.07 mol) of s-BPDA and 9.31 g (0.03 mol) of ODPA were added and stirred at 70 ° C. for 4 hours to obtain a solid content concentration of 23.2% by mass. A polyimide precursor composition having a viscosity of 3.1 Pa ⁇ s and a logarithmic viscosity of 0.27 was obtained.
- Example 11 To a glass reaction vessel having an internal volume of 500 mL equipped with a stirrer and a nitrogen gas introduction / discharge tube, 98 g of water was added as a solvent, to which 10.01 g (0.05 mol) of ODA and 5.41 g of PPD ( 0.05 mol) and 38.45 g of 1,2-DMZ (0.40 mol, 4.0 times equivalent of tetracarboxylic acid component) were added and stirred at 25 ° C. for 1 hour to dissolve. To this solution, 20.60 g (0.07 mol) of s-BPDA and 9.31 g (0.03 mol) of ODPA were added and stirred at 70 ° C. for 4 hours to obtain a solid content concentration of 23.1% by mass. A polyimide precursor composition having a viscosity of 2.1 Pa ⁇ s and a logarithmic viscosity of 0.26 was obtained.
- Example 12 93 g of water and 5 g of NMP were added as solvents to a glass reaction vessel having an internal volume of 500 mL equipped with a stirrer and a nitrogen gas inlet / outlet tube, to which 10.01 g (0.05 mol) of ODA, PPD Add 5.41 g (0.05 mol) and 38.45 g of 1,2-DMZ (0.40 mol, 4.0 times equivalent of tetracarboxylic acid component), and stir at 25 ° C. for 1 hour. Dissolved. To this solution, 20.60 g (0.07 mol) of s-BPDA and 9.31 g (0.03 mol) of ODPA were added and stirred at 70 ° C. for 4 hours to obtain a solid content concentration of 23.1% by mass. A polyimide precursor composition having a viscosity of 2.0 Pa ⁇ s and a logarithmic viscosity of 0.25 was obtained.
- Example 13 To a glass reaction vessel having an internal volume of 500 mL equipped with a stirrer and a nitrogen gas introduction / discharge tube, 102 g of water was added as a solvent, and 14.02 g (0.07 mol) of ODA and 3.24 g of PPD ( 0.03 mol) and 38.45 g (0.40 mol, 4.0 times equivalent of tetracarboxylic acid component) of 1,2-DMZ were added and stirred at 25 ° C. for 1 hour to dissolve. To this solution, 20.60 g (0.07 mol) of s-BPDA and 8.83 g (0.03 mol) of a-BPDA were added and stirred at 70 ° C. for 4 hours to obtain a solid content concentration of 23.0% by mass. A polyimide precursor composition having a solution viscosity of 4.3 Pa ⁇ s and a logarithmic viscosity of 0.22 was obtained.
- Example 14 97 g of water and 5 g of NMP were added as solvents to a glass reaction vessel having an internal volume of 500 mL equipped with a stirrer and a nitrogen gas introduction / discharge tube, and 14.02 g (0.07 mol) of ODA, 3.24 g (0.03 mol) and 1,2-DMZ 38.45 g (0.40 mol, 4.0 times equivalent of tetracarboxylic acid component) were added and stirred at 25 ° C. for 1 hour. Dissolved. To this solution, 20.60 g (0.07 mol) of s-BPDA and 8.83 g (0.03 mol) of a-BPDA were added and stirred at 70 ° C. for 4 hours to obtain a solid content concentration of 23.1% by mass. A polyimide precursor composition having a solution viscosity of 3.1 Pa ⁇ s and a logarithmic viscosity of 0.24 was obtained.
- Example 15 To a glass reaction vessel having an internal volume of 500 mL equipped with a stirrer and a nitrogen gas introduction / discharge tube, 102 g of water was added as a solvent, and 14.02 g (0.07 mol) of ODA and 3.24 g of PPD ( 0.03 mol) and 38.45 g (0.40 mol, 4.0 times equivalent of tetracarboxylic acid component) of 1,2-DMZ were added and stirred at 25 ° C. for 1 hour to dissolve. To this solution, 29.42 g (0.10 mol) of s-BPDA was added and stirred at 70 ° C. for 4 hours to obtain a polyimide having a solid content concentration of 22.9 mass%, a solution viscosity of 21 Pa ⁇ s, and a logarithmic viscosity of 0.37. A precursor composition was obtained.
- Example 16 97 g of water and 5 g of NMP were added as solvents to a glass reaction vessel having an internal volume of 500 mL equipped with a stirrer and a nitrogen gas introduction / discharge tube, and 14.02 g (0.07 mol) of ODA, 3.24 g (0.03 mol) and 1,2-DMZ 38.45 g (0.40 mol, 4.0 times equivalent of tetracarboxylic acid component) were added and stirred at 25 ° C. for 1 hour. Dissolved. To this solution, 29.42 g (0.10 mol) of s-BPDA was added and stirred at 70 ° C. for 4 hours to obtain a polyimide having a solid content concentration of 23.1 mass%, a solution viscosity of 15 Pa ⁇ s, and a logarithmic viscosity of 0.36. A precursor composition was obtained.
- Example 1 A polyimide precursor composition was prepared in the same manner as in Example 1 except that 1,2-DMZ was not used, and an insulating coating layer was produced on the polyimide film in the same manner as in Example 2 using this. The results are shown in Table 3.
- Example 2 A polyimide precursor composition was prepared in the same manner as in Example 5 except that 1,2-DMZ was not used, and an insulating coating layer was produced on the polyimide film in the same manner as in Example 2 using this. The results are shown in Table 3.
- Example 3 A polyimide precursor composition was prepared in the same manner as in Example 1 except that 14.83 g of IQ (0.11 mol, 0.57 times equivalent of tetracarboxylic acid component) was used instead of 1,2-DMZ. Using this, an insulating coating layer was produced on a polyimide film in the same manner as in Example 2. The results are shown in Table 3.
- This polyimide precursor composition was applied to a polyimide film having a thickness of 50 ⁇ m fixed on a glass plate.
- the obtained sample was placed in a baking furnace preheated to 400 ° C. and then held for 1 minute to prepare a coating film. At that time, the sample temperature increased from 100 ° C. to 280 ° C. for 37 seconds (temperature increase rate: 4.9 ° C./s).
- Table 3 shows the results of state observation and evaluation of characteristics of the obtained polyimide precursor and insulating coating layer.
Abstract
Description
1. 基材にポリイミド前駆体組成物を塗布、焼付けする工程を有するポリイミド絶縁被覆層の製造方法であって、
ポリイミド前駆体組成物が、下記化学式(1)で示される繰返し単位からなるポリアミック酸と、イミダゾール類、及びアミン化合物からなる群より選択される塩基性化合物とを含み、
焼付け工程において、
ポリイミド前駆体組成物を加熱する時間が10~180秒間であり、
100℃から280℃までの平均昇温速度が5℃/s以上であり、
最高加熱温度が300~500℃であることを特徴とする絶縁被覆層の製造方法。
3. イミダゾール類が、1,2-ジメチルイミダゾール、2-エチル-4-メチルイミダゾール、4-エチル-2-メチルイミダゾール、及び1-メチル-4-エチルイミダゾールからなる群から選択されるイミダゾール類であることを特徴とする前記項2に記載の絶縁被覆層の製造方法。
4. ポリイミド前駆体組成物が、塩基性化合物として、脂肪族アミン、又は環状アミンを含むことを特徴とする前記項1~3のいずれかに記載の絶縁被覆層の製造方法。
5. アミン化合物が、トリメチルアミン、ジエチルアミン、ジメチルエチルアミン、トリエチルアミン、N-プロピルエチルアミン、N-ブチルエチルアミン、N,N-ジメチルシクロヘキシルアミン、及び1,4-ジアザビシクロ[2,2,2]オクタンからなる群から選択される化合物であることを特徴とする前記項4に記載の絶縁被覆層の製造方法。
<固形分濃度>
試料溶液(その質量をw1とする)を、熱風乾燥機中120℃で10分間、250℃で10分間、次いで350℃で30分間加熱処理して、加熱処理後の質量(その質量をw2とする)を測定する。固形分濃度[質量%]は、次式によって算出した。
<対数粘度>
試料溶液を、固形分濃度に基づいて濃度が0.5g/dl(溶媒は水もしくはN-メチル-2-ピロリドン)になるように希釈した。この希釈液を、30℃にて、キャノンフェンスケNo.100を用いて流下時間(T1)を測定した。対数粘度は、ブランクの水の流下時間(T0)を用いて、次式から算出した。
<溶液粘度(回転粘度)>
トキメック社製E型粘度計を用いて30℃で測定した。
<絶縁被覆層の状態観察(被覆膜評価)>
得られた被覆層について目視により状態観察を行った。濁りが全くないものを良好、濁りがある領域が10%を越えているものを濁りありとした。「濁りがある」ということは、ポリイミド樹脂が少なくとも一部結晶化していることを示している。
<昇温速度の測定>
被覆層形成工程において、キーエンス株式会社製の計測ユニットNR-TH08と解析ソフトWAVE LOGGERを用いて、サンプル温度が100℃から280℃に変化するまでの所要時間を測定した。
s-BPDA:3,3’,4,4’-ビフェニルテトラカルボン酸二無水物
ODPA:4,4’-オキシジフタル酸二無水物
a-BPDA:2,3,3’,4’-ビフェニルテトラカルボン酸二無水物
ODA:4,4’-ジアミノジフェニルエーテル
PPD:p-フェニレンジアミン
1,2-DMZ:1,2-ジメチルイミダゾ-ル
DABCO:1,4-ジアザビシクロ[2,2,2]オクタン
IQ:イソキノリン
NMP:N-メチル-2-ピロリドン
攪拌機、窒素ガス導入・排出管を備えた内容積500mLのガラス製の反応容器に、溶媒としてNMPの396gを加え、これにODAの40.05g(0.20モル)を加え50℃で1時間攪拌し、溶解させた。この溶液にs-BPDAの58.84g(0.20モル)を加え、50℃で3時間撹拌して、固形分濃度18.5質量%、溶液粘度5.0Pa・s、対数粘度0.68のポリイミド前駆体を得た。このポリイミド前駆体に1,2-DMZの14.83g(0.15モル、テトラカルボン酸成分の0.75倍等量)を添加しポリイミド前駆体組成物を得た。
ポリイミド前駆体組成物を、膜厚50μmのポリイミドフィルム上に塗工したこと以外は実施例1と同様にして、ポリイミドフィルム上に絶縁被覆層の製造を行った。結果を表1に示した。
1,2-DMZの代わりに、DABCOの14.83g(0.13モル、テトラカルボン酸成分の0.66倍等量)を用いた以外は実施例1と同様にしてポリイミド前駆体組成物を調製し、これを用いて実施例2と同様にして、ポリイミドフィルム上に絶縁被覆層の製造を行った。結果を表1に示した。
攪拌機、窒素ガス導入・排出管を備えた内容積500mLのガラス製の反応容器に、溶媒としてNMPの359gを加え、これにODAの20.02g(0.10モル)、PPDの10.81g(0.10モル)を加え50℃で1時間攪拌し、溶解させた。この溶液にs-BPDAの58.84g(0.20モル)を加え、50℃で3時間撹拌して、固形分濃度18.4質量%、溶液粘度9.5Pa・s、対数粘度0.69のポリイミド前駆体を得た。このポリイミド前駆体に1,2-DMZの13.45g(0.14モル、テトラカルボン酸成分の0.70倍等量)を添加しポリイミド前駆体組成物を得た。
攪拌機、窒素ガス導入・排出管を備えた内容積500mLのガラス製の反応容器に、溶媒としてNMPの377gを加え、これにODAの28.03g(0.14モル)、PPDの6.49g(0.06モル)を加え50℃で1時間攪拌し、溶解させた。この溶液にs-BPDAの41.19g(0.14モル)、ODPAの18.61g(0.06モル)を加え、50℃で3時間撹拌して、固形分濃度18.5質量%、溶液粘度5.1Pa・s、対数粘度0.68のポリイミド前駆体を得た。このポリイミド前駆体に1,2-DMZの14.15g(0.15モル、テトラカルボン酸成分の0.74倍等量)を添加しポリイミド前駆体組成物を得た。
攪拌機、窒素ガス導入・排出管を備えた内容積500mLのガラス製の反応容器に、溶媒として水の421gを加え、これにODAの20.02g(0.10モル)と、1,2-DMZの24.03g(0.25モル、テトラカルボン酸成分の2.5倍等量)とを加え、25℃で1時間攪拌し、溶解させた。この溶液にs-BPDAの29.42g(0.10モル)を加え、70℃で4時間撹拌して、固形分濃度9.3質量%、溶液粘度32Pa・s、対数粘度0.42のポリイミド前駆体組成物を得た。
攪拌機、窒素ガス導入・排出管を備えた内容積500mLのガラス製の反応容器に、溶媒として水の406gを加え、これにPPDの12.97g(0.12モル)と、1,2-DMZの28.84g(0.30モル、テトラカルボン酸成分の2.5倍等量)とを加え、25℃で1時間攪拌し、溶解させた。この溶液にs-BPDAの35.31g(0.12モル)を加え、70℃で4時間撹拌して、固形分濃度9.1質量%、溶液粘度63Pa・s、対数粘度1.86のポリイミド前駆体組成物を得た。
攪拌機、窒素ガス導入・排出管を備えた内容積500mLのガラス製の反応容器に、溶媒として水の400gを加え、これにODAの14.02g(0.07モル)、PPDの3.24g(0.03モル)と、1,2-DMZの24.03g(0.25モル、テトラカルボン酸成分の2.5倍等量)とを加え、25℃で1時間攪拌し、溶解させた。この溶液にs-BPDAの20.60g(0.07モル)、ODPAの9.31g(0.03モル)を加え、70℃で4時間撹拌して、固形分濃度9.2質量%、溶液粘度52Pa・s、対数粘度0.46のポリイミド前駆体組成物を得た。
攪拌機、窒素ガス導入・排出管を備えた内容積500mLのガラス製の反応容器に、溶媒として水の103gを加え、これにODAの14.02g(0.07モル)、PPDの3.24g(0.03モル)と、1,2-DMZの38.45g(0.40モル、テトラカルボン酸成分の4.0倍等量)とを加え、25℃で1時間攪拌し、溶解させた。この溶液にs-BPDAの20.60g(0.07モル)、ODPAの9.31g(0.03モル)を加え、70℃で4時間撹拌して、固形分濃度23.1質量%、溶液粘度3.5Pa・s、対数粘度0.25のポリイミド前駆体組成物を得た。
攪拌機、窒素ガス導入・排出管を備えた内容積500mLのガラス製の反応容器に、溶媒として水の98gとNMPの5.0gを加え、これにODAの14.02g(0.07モル)、PPDの3.24g(0.03モル)と、1,2-DMZの38.45g(0.40モル、テトラカルボン酸成分の4.0倍等量)とを加え、25℃で1時間攪拌し、溶解させた。この溶液にs-BPDAの20.60g(0.07モル)、ODPAの9.31g(0.03モル)を加え、70℃で4時間撹拌して、固形分濃度23.2質量%、溶液粘度3.1Pa・s、対数粘度0.27のポリイミド前駆体組成物を得た。
攪拌機、窒素ガス導入・排出管を備えた内容積500mLのガラス製の反応容器に、溶媒として水の98gを加え、これにODAの10.01g(0.05モル)、PPDの5.41g(0.05モル)と、1,2-DMZの38.45g(0.40モル、テトラカルボン酸成分の4.0倍等量)とを加え、25℃で1時間攪拌し、溶解させた。この溶液にs-BPDAの20.60g(0.07モル)、ODPAの9.31g(0.03モル)を加え、70℃で4時間撹拌して、固形分濃度23.1質量%、溶液粘度2.1Pa・s、対数粘度0.26のポリイミド前駆体組成物を得た。
攪拌機、窒素ガス導入・排出管を備えた内容積500mLのガラス製の反応容器に、溶媒として水の93gとNMPの5gを加え、これにODAの10.01g(0.05モル)、PPDの5.41g(0.05モル)と、1,2-DMZの38.45g(0.40モル、テトラカルボン酸成分の4.0倍等量)とを加え、25℃で1時間攪拌し、溶解させた。この溶液にs-BPDAの20.60g(0.07モル)、ODPAの9.31g(0.03モル)を加え、70℃で4時間撹拌して、固形分濃度23.1質量%、溶液粘度2.0Pa・s、対数粘度0.25のポリイミド前駆体組成物を得た。
攪拌機、窒素ガス導入・排出管を備えた内容積500mLのガラス製の反応容器に、溶媒として水の102gを加え、これにODAの14.02g(0.07モル)、PPDの3.24g(0.03モル)と、1,2-DMZの38.45g(0.40モル、テトラカルボン酸成分の4.0倍等量)とを加え、25℃で1時間攪拌し、溶解させた。この溶液にs-BPDAの20.60g(0.07モル)、a-BPDAの8.83g(0.03モル)を加え、70℃で4時間撹拌して、固形分濃度23.0質量%、溶液粘度4.3Pa・s、対数粘度0.22のポリイミド前駆体組成物を得た。
攪拌機、窒素ガス導入・排出管を備えた内容積500mLのガラス製の反応容器に、溶媒として水の97gとNMPの5gを加え、これにODAの14.02g(0.07モル)、PPDの3.24g(0.03モル)と、1,2-DMZの38.45g(0.40モル、テトラカルボン酸成分の4.0倍等量)とを加え、25℃で1時間攪拌し、溶解させた。この溶液にs-BPDAの20.60g(0.07モル)、a-BPDAの8.83g(0.03モル)を加え、70℃で4時間撹拌して、固形分濃度23.1質量%、溶液粘度3.1Pa・s、対数粘度0.24のポリイミド前駆体組成物を得た。
攪拌機、窒素ガス導入・排出管を備えた内容積500mLのガラス製の反応容器に、溶媒として水の102gを加え、これにODAの14.02g(0.07モル)、PPDの3.24g(0.03モル)と、1,2-DMZの38.45g(0.40モル、テトラカルボン酸成分の4.0倍等量)とを加え、25℃で1時間攪拌し、溶解させた。この溶液にs-BPDAの29.42g(0.10モル)を加え、70℃で4時間撹拌して、固形分濃度22.9質量%、溶液粘度21Pa・s、対数粘度0.37のポリイミド前駆体組成物を得た。
攪拌機、窒素ガス導入・排出管を備えた内容積500mLのガラス製の反応容器に、溶媒として水の97gとNMPの5gを加え、これにODAの14.02g(0.07モル)、PPDの3.24g(0.03モル)と、1,2-DMZの38.45g(0.40モル、テトラカルボン酸成分の4.0倍等量)とを加え、25℃で1時間攪拌し、溶解させた。この溶液にs-BPDAの29.42g(0.10モル)を加え、70℃で4時間撹拌して、固形分濃度23.1質量%、溶液粘度15Pa・s、対数粘度0.36のポリイミド前駆体組成物を得た。
1,2-DMZを用いないこと以外は実施例1と同様にしてポリイミド前駆体組成物を調製し、これを用いて実施例2と同様にして、ポリイミドフィルム上に絶縁被覆層を製造した。結果を表3に示した。
1,2-DMZを用いないこと以外は実施例5と同様にしてポリイミド前駆体組成物を調製し、これを用いて実施例2と同様にして、ポリイミドフィルム上に絶縁被覆層を製造した。結果を表3に示した。
1,2-DMZの代わりにIQの14.83g(0.11モル、テトラカルボン酸成分の0.57倍等量)を用いたこと以外は実施例1と同様にしてポリイミド前駆体組成物を調製し、これを用いて実施例2と同様にして、ポリイミドフィルム上に絶縁被覆層を製造した。結果を表3に示した。
攪拌機、窒素ガス導入・排出管を備えた内容積500mLのガラス製の反応容器に、溶媒としてNMPの396gを加え、これにODAの40.05g(0.20モル)を加え50℃で1時間攪拌し、溶解させた。この溶液にs-BPDAの58.84g(0.20モル)を加え、50℃で3時間撹拌して、固形分濃度18.5質量%、溶液粘度5.0Pa・s、対数粘度0.68のポリイミド前駆体を得た。
Claims (5)
- 基材にポリイミド前駆体組成物を塗布、焼付けする工程を有するポリイミド絶縁被覆層の製造方法であって、
ポリイミド前駆体組成物が、下記化学式(1)で示される繰返し単位からなるポリアミック酸と、イミダゾール類、及びアミン化合物からなる群より選択される塩基性化合物とを含み、
焼付け工程において、
ポリイミド前駆体組成物を加熱する時間が10~180秒間であり、
100℃から280℃までの平均昇温速度が5℃/s以上であり、
最高加熱温度が300~500℃であることを特徴とする絶縁被覆層の製造方法。
- ポリイミド前駆体組成物が、塩基性化合物として、置換基として2個以上のアルキル基を有するイミダゾール類を含むことを特徴とする請求項1に記載の絶縁被覆層の製造方法。
- イミダゾール類が、1,2-ジメチルイミダゾール、2-エチル-4-メチルイミダゾール、4-エチル-2-メチルイミダゾール、及び1-メチル-4-エチルイミダゾールからなる群から選択されるイミダゾール類であることを特徴とする請求項2に記載の絶縁被覆層の製造方法。
- ポリイミド前駆体組成物が、塩基性化合物として、脂肪族アミン、又は環状アミンを含むことを特徴とする請求項1~3のいずれかに記載の絶縁被覆層の製造方法。
- アミン化合物が、トリメチルアミン、ジエチルアミン、ジメチルエチルアミン、トリエチルアミン、N-プロピルエチルアミン、N-ブチルエチルアミン、N,N-ジメチルシクロヘキシルアミン、及び1,4-ジアザビシクロ[2,2,2]オクタンからなる群から選択される化合物であることを特徴とする請求項4に記載の絶縁被覆層の製造方法。
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US10501579B2 (en) | 2015-02-20 | 2019-12-10 | Sabic Global Technologies B.V. | Poly(amic acid) synthesis and conversion to high molecular weight polyimide |
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