WO2017138599A1 - 樹脂フィルム、積層フィルム及びフレキシブルプリント配線板用基板 - Google Patents
樹脂フィルム、積層フィルム及びフレキシブルプリント配線板用基板 Download PDFInfo
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- WO2017138599A1 WO2017138599A1 PCT/JP2017/004708 JP2017004708W WO2017138599A1 WO 2017138599 A1 WO2017138599 A1 WO 2017138599A1 JP 2017004708 W JP2017004708 W JP 2017004708W WO 2017138599 A1 WO2017138599 A1 WO 2017138599A1
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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
- C08G65/00—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule
- C08G65/34—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives
- C08G65/38—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives derived from phenols
- C08G65/40—Macromolecular compounds obtained by reactions forming an ether link in the main chain of the macromolecule from hydroxy compounds or their metallic derivatives derived from phenols from phenols (I) and other compounds (II), e.g. OH-Ar-OH + X-Ar-X, where X is halogen atom, i.e. leaving group
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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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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
Definitions
- the present invention relates to a resin film, a laminated film, and a flexible printed wiring board substrate.
- This application claims priority based on Japanese Patent Application No. 2016-23701 filed in Japan on February 10, 2016 and Japanese Patent Application No. 2016-139739 filed in Japan on July 14, 2016. The contents are incorporated here.
- aromatic polysulfone Since aromatic polysulfone is excellent in heat resistance and chemical resistance, it is used as a material for molded articles in various applications.
- the aromatic polysulfone is usually produced by subjecting an aromatic dihalogenosulfone compound and an aromatic dihydroxy compound to a polycondensation reaction in the presence of a base and a reaction solvent (see, for example, Patent Documents 1 and 2).
- the reaction mixture obtained by the above polycondensation reaction contains an aromatic polysulfone, an unreacted base, a by-product (an alkali halide when an alkali metal salt is used as a base) and a reaction solvent.
- aromatic polysulfone is isolated from this reaction mixture, and the remaining amount of unreacted base, by-products and reaction solvent is small.
- Patent Document 3 after removing a by-product and a solvent from a polymer mixture using a non-solvent such as alcohol or water, the bulk density of the aromatic polyether polymer is adjusted in a mixed solvent of an aliphatic alcohol and a ketone. A method of raising is disclosed.
- Patent Document 4 discloses a method in which a polymer mixture is pulverized in a non-solvent and then heated under reduced pressure at a temperature lower than the glass transition temperature or melting point of the polymer mixture and at or above the vapor pressure of the reaction solvent. .
- Patent Document 5 a mixed solvent of a specific solvent such as 1,3-dimethyl-2-imidazolidinone and a non-solvent of an aromatic polyether polymer is added to the reaction crude liquid after removing the by-product salt, A method is disclosed in which an aromatic polyether polymer is precipitated in a non-solvent and then washed.
- a specific solvent such as 1,3-dimethyl-2-imidazolidinone
- a non-solvent of an aromatic polyether polymer is added to the reaction crude liquid after removing the by-product salt
- the resin films made of conventional aromatic polysulfone as described in Patent Documents 1 to 5 do not necessarily have sufficient mechanical strength such as toughness. Therefore, it is desired to improve the mechanical strength of a resin film using aromatic polysulfone as a forming material.
- the present invention has been made in view of such circumstances, and an object thereof is to provide a resin film having excellent mechanical strength such as toughness. Another object is to provide a laminated film including the resin film and having excellent mechanical strength such as toughness. It is another object of the present invention to provide a flexible printed wiring board including the laminated film and having excellent mechanical strength such as toughness.
- one embodiment of the present invention is a resin film using an aromatic polysulfone as a forming material, the thickness of the resin film being less than 100 ⁇ m, and the resin film having a boiling point of 250 ° C. or higher.
- the resin film further includes an organic compound having a temperature of 400 ° C. or less, and the organic compound is contained in an amount of 500 ppm to 4000 ppm with respect to the mass of the aromatic polysulfone.
- the aromatic polysulfone has a repeating unit represented by the formula (1), and the total amount of all repeating units constituting the aromatic polysulfone is represented by the formula (1). It is preferable that the repeating unit represented is 80 to 100 mol%.
- Ph 1 and Ph 2 represents a phenylene group, one or more hydrogen atoms bonded to the phenylene group, independently of one another, an alkyl group having 1 to 10 carbon atoms, having a carbon number of 6 to It may be substituted with 20 aryl groups or halogen atoms.
- the organic compound is dispersed in claim [delta] D (unit: MPa 0.5) in Hansen solubility parameter 16.0 or 22.0 or less, polarity term [delta] P (unit: MPa 0.5) is It is preferable that 12.0 or more and 16.4 or less and the hydrogen bond term ⁇ H (unit: MPa 0.5 ) is 3.0 or more and 12.0 or less.
- the organic compound is preferably an aprotic polar solvent.
- the organic compound is preferably diphenyl sulfone.
- One embodiment of the present invention provides a laminated film having a layer made of the above resin film and a layer made of a conductor.
- One embodiment of the present invention provides a flexible printed wiring board substrate using the above laminated film.
- a resin film having an aromatic polysulfone as a forming material The resin film has a thickness of less than 100 ⁇ m, The resin film further includes an organic compound having a boiling point of 250 ° C. or higher and 400 ° C. or lower, The said organic compound is a resin film contained 500 ppm or more and 4000 ppm or less with respect to the mass of the said aromatic polysulfone.
- the aromatic polysulfone has a repeating unit represented by the formula (1), The resin film according to ⁇ 1>, wherein the repeating unit represented by the formula (1) is 80 to 100 mol% with respect to a total amount of all repeating units constituting the aromatic polysulfone.
- Ph 1 and Ph 2 represent a phenylene group, and one or more hydrogen atoms bonded to the phenylene group are independently of each other an alkyl group having 1 to 10 carbon atoms, It may be substituted with 20 aryl groups or halogen atoms.
- the organic compound has a dispersion term ⁇ D (unit: MPa 0.5 ) in the Hansen solubility parameter of 16.0 to 22.0 and a polar term ⁇ P (unit: MPa 0.5 ) of 12.0 to 16
- ⁇ D unit: MPa 0.5
- a hydrogen bond term ⁇ H unit: MPa 0.5
- ⁇ 5> The resin film according to any one of ⁇ 1> to ⁇ 4>, wherein the organic compound is diphenylsulfone.
- ⁇ 6> A laminated film comprising a layer made of the resin film according to any one of ⁇ 1> to ⁇ 5> and a layer made of a conductor.
- ⁇ 7> A substrate for flexible printed wiring board comprising the laminated film according to ⁇ 6>.
- a resin film excellent in mechanical strength such as toughness is provided. Moreover, the laminated film excellent in mechanical strength, such as toughness, containing this resin film is provided. Furthermore, the flexible printed wiring board excellent in mechanical strength, such as toughness, containing this laminated film is provided.
- the resin film according to this embodiment is a film having an aromatic polysulfone as a forming material and a thickness of less than 100 ⁇ m.
- the resin film further includes an organic compound having a boiling point of 250 ° C. or higher and 400 ° C. or lower (hereinafter sometimes referred to as “compound A”), and the compound A is 500 ppm or higher and 4000 ppm or lower, based on the mass of the aromatic polysulfone.
- it is 600 ppm or more and 3500 ppm or less, More preferably, it is 700 ppm or more and 3200 ppm or less, More preferably, it is contained 800 ppm or more and 3000 ppm or less.
- One aspect of the present invention is a resin film formed from an aromatic polysulfone composition containing an aromatic polysulfone and an organic compound having a boiling point of 250 ° C. or more and 400 ° C. or less, wherein the organic compound is the aromatic polysulfone.
- the resin film contains 500 ppm or more and 4000 ppm or less with respect to the mass and has a thickness of less than 100 ⁇ m.
- the aromatic polysulfone typically contains a divalent aromatic group (residue obtained by removing two hydrogen atoms bonded to the aromatic ring from the aromatic compound) and a sulfonyl group (- A resin having a repeating unit containing SO 2- ) and an oxygen atom.
- a divalent aromatic group include a phenylene group and a naphthalenediyl group.
- Preferred examples include a phenylene group, and these groups may have a substituent.
- the aromatic polysulfone preferably has a repeating unit represented by the formula (1) (hereinafter sometimes referred to as “repeating unit (1)”) from the viewpoint of heat resistance and chemical resistance.
- An aromatic polysulfone having the repeating unit (1) may be referred to as an aromatic polyethersulfone.
- the aromatic polysulfone further includes a repeating unit represented by the formula (2) (hereinafter sometimes referred to as “repeating unit (2)”) or a repeating unit represented by the formula (3) (hereinafter referred to as “repeating unit”). Other repeating units such as “repeating unit (3)” may be included.
- Ph 1 and Ph 2 represent a phenylene group, and one or more hydrogen atoms of the phenylene group are independently of each other an alkyl group having 1 to 10 carbon atoms, or a carbon atom having 6 to 20 carbon atoms. It may be substituted with an aryl group or a halogen atom. ]
- Ph 3 and Ph 4 represent a phenylene group, and one or more hydrogen atoms of the phenylene group are independently of each other an alkyl group having 1 to 10 carbon atoms or a carbon atom having 6 to 20 carbon atoms. It may be substituted with an aryl group or a halogen atom.
- R is an alkylidene group having 1 to 5 carbon atoms, an oxygen atom or a sulfur atom.
- Ph 5 represents a phenylene group, and one or more hydrogen atoms of the phenylene group are independently of each other an alkyl group having 1 to 10 carbon atoms, an aryl group having 6 to 20 carbon atoms, or It may be substituted with a halogen atom.
- n is an integer of 1 to 3, and when n is 2 or more, a plurality of Ph 5 may be the same or different from each other.
- the phenylene group represented by any of Ph 1 to Ph 5 is, independently of each other, a p-phenylene group, an m-phenylene group, or an o-phenylene group, and is preferably a p-phenylene group.
- alkyl group having 1 to 10 carbon atoms which may be substituted with a hydrogen atom of the phenylene group
- examples of the alkyl group having 1 to 10 carbon atoms which may be substituted with a hydrogen atom of the phenylene group include a methyl group, an ethyl group, an n-propyl group, an isopropyl group, an n-butyl group, an isobutyl group, a sec- Examples include butyl group, tert-butyl group, n-pentyl group, n-hexyl group, n-heptyl group, 2-ethylhexyl group, n-octyl group and n-decyl group.
- Examples of the aryl group having 6 to 20 carbon atoms that may be substituted for the hydrogen atom of the phenylene group include a phenyl group, o-tolyl group, m-tolyl group, p-tolyl group, 1-naphthyl group and 2 A naphthyl group.
- the number is preferably 2 or less, more preferably 1 for each phenylene group, independently of each other.
- Examples of the alkylidene group having 1 to 5 carbon atoms represented by R include a methylene group, an ethylidene group, an isopropylidene group, and a 1-butylidene group.
- the total amount of all the repeating units constituting the aromatic polysulfone, that is, the repeating unit (1) is preferably 50 to 100 mol%, more preferably 80 to 100 mol%, more preferably the repeating unit based on the total molar quantity. More preferably, it has substantially only the repeating unit (1).
- the aromatic polysulfone may have two or more repeating units (1) to (3) independently of each other.
- the reduced viscosity (unit: dL / g) of the aromatic polysulfone of the present embodiment is preferably 0.30 or more, more preferably 0.40 or more and 0.80 or less. That is, the reduced viscosity (unit: dL / g) of the aromatic polysulfone is preferably 0.30 or more and 0.80 or less, and more preferably 0.40 or more and 0.80 or less.
- a reduced viscosity can be measured by the method as described in the below-mentioned Example.
- Aromatic polysulfone tends to improve mechanical strength such as toughness when it is used as a resin film as the reduced viscosity is higher. However, if it is too high, the melting temperature and melt viscosity are likely to be high, and the fluidity is likely to be low.
- the boiling point of the compound A according to this embodiment is 250 ° C. or higher and 400 ° C. or lower, and preferably 350 ° C. or higher and 400 ° C. or lower.
- a known method can be applied to the boiling point measurement, and in the case of a simple substance, values described in documents such as a chemical handbook can also be referred to.
- the boiling point in this specification is represented by the value measured at 1 atmosphere.
- the dispersion term ⁇ D (unit: MPa 0.5 ) in the Hansen solubility parameter of compound A is preferably 16.0 or more and 22.0 or less, more preferably 16.0 or more and 20.0 or less. More preferably, it is 0 or more and 19.0 or less.
- the dispersion term ⁇ D (unit: MPa 0.5 ) in the Hansen solubility parameter of the compound A is preferably 18.0 or more and 22.0 or less, and 19.0 or more and 22.0. The following is more preferable.
- the polar term ⁇ P (unit: MPa 0.5 ) in the Hansen solubility parameter of compound A is preferably 12.0 or more and 16.4 or less, more preferably 12.0 or more and 15.0 or less.
- the hydrogen bond term ⁇ H (unit: MPa 0.5 ) in the Hansen solubility parameter of compound A is preferably 3.0 or more and 12.0 or less, more preferably 3.0 or more and 8.0 or less. More preferably, it is 7.0 or more and 8.0 or less.
- the hydrogen bond term ⁇ H (unit: MPa 0.5 ) in the Hansen solubility parameter of compound A is preferably 3.0 or more and 4.0 or less.
- the dispersion term ⁇ D (unit: MPa 0.5 ) is 16.0 to 22.0
- the polar term ⁇ P (unit: MPa 0.5 ) is 12.0 to 16.4
- the hydrogen bond term It is more preferable that ⁇ H (unit: MPa 0.5 ) is 3.0 or more and 12.0 or less.
- the dispersion term ⁇ D (unit: MPa 0.5 ) is 18.0 to 22.0
- the polar term ⁇ P (unit: MPa 0.5 ) is 12.0 to 15.0
- the hydrogen bond term ⁇ H (unit: MPa 0.5 ) is more preferably 3.0 or more and 8.0 or less.
- the dispersion term ⁇ D (unit: MPa 0.5 ) in the Hansen solubility parameter is 19.0 or more and 22.0 or less
- the polar term ⁇ P (unit: MPa 0.5 ) is 12.0 or more and 14.5 or less.
- the hydrogen bond term ⁇ H (unit: MPa 0.5 ) is more preferably 3.0 or more and 4.0 or less.
- the Hansen solubility parameter is useful for predicting the ability of a solvent material to dissolve a particular solute, where the dispersion term ⁇ D is derived from the intermolecular dispersion force and the polar term ⁇ P is derived from the intermolecular polar force.
- the hydrogen bond term ⁇ H represents the energy derived from the hydrogen bond force.
- the Hansen solubility parameter can be calculated from its chemical formula by using, for example, the computer software Hansen Solubility Parameters in Practice (HSPIP).
- HSPIP ver For compounds registered in the database of 5.0.03, the value is used.
- HSPiP ver For compounds not in the database, HSPiP ver. The value obtained by the calculation according to 5.0.03 can be used.
- Compound A is preferably an aprotic polar solvent, and more preferably an aprotic polar solvent whose Hansen solubility parameter satisfies the above-mentioned conditions.
- examples thereof include sulfones such as dimethyl sulfone, diethyl sulfone, diisopropyl sulfone, and diphenyl sulfone.
- Compound A is more preferably an aprotic polar solvent whose Hansen solubility parameter satisfies the above-mentioned conditions, and an example thereof is diphenylsulfone.
- Table 1 shows the values of the terms (dispersion term ⁇ D, polar term ⁇ P, and hydrogen bond term ⁇ H) in the Hansen solubility parameter of diphenylsulfone.
- the boiling point of diphenyl sulfone is 378 ° C.
- Compound A may be used alone or in combination of two or more.
- the resin film according to this embodiment is formed from a composition containing aromatic polysulfone and compound A.
- the method for producing the resin film include a solution casting method and a melt extrusion method which will be described later.
- This composition contains 500 ppm or more and 4000 ppm or less, preferably 600 ppm or more and 3500 ppm or less, more preferably 700 ppm or more and 3200 ppm or less, and still more preferably 800 ppm or more and 3000 ppm or less with respect to the mass of the aromatic polysulfone.
- the composition according to this embodiment is excellent in mechanical strength such as toughness when it is formed into a resin film by including Compound A in the above-described range.
- the toughness can be measured by the method described in Examples described later.
- composition (Composition)
- the method for producing a composition according to the present embodiment comprises mixing an aromatic dihalogenosulfone compound, an aromatic dihydroxy compound, a base and an organic solvent, and subjecting the aromatic dihalogenosulfone compound and the aromatic dihydroxy compound to a polycondensation reaction. This is a method for producing a composition.
- the aromatic dihalogenosulfone compound and the aromatic dihydroxy compound correspond to the repeating unit constituting the aromatic polysulfone.
- the aromatic dihalogenosulfone compound may be a compound having an aromatic ring, a sulfonyl group (—SO 2 —), and two halogeno groups in one molecule.
- the aromatic dihydroxy compound may be a compound having an aromatic ring and two hydroxy groups in one molecule.
- the aromatic polysulfone having the repeating unit (1) includes a compound represented by the formula (4) (hereinafter sometimes referred to as “compound (4)”) and a compound represented by the formula (5) ( Hereinafter, it may be produced by polycondensation reaction with “compound (5)”.
- the aromatic polysulfone having the repeating unit (1) and the repeating unit (2) includes the compound (4) and a compound represented by the formula (6) (hereinafter sometimes referred to as “compound (6)”). Can be produced by polycondensation reaction.
- the aromatic polysulfone having the repeating unit (1) and the repeating unit (3) includes the compound (4) and a compound represented by the formula (7) (hereinafter sometimes referred to as “compound (7)”). Can be produced by polycondensation reaction.
- X 1 -Ph 1 -SO 2 -Ph 2 -X 2 (4)
- X 1 and X 2 each independently represent a halogen atom. Ph 1 and Ph 2 are as defined above.
- X 1 and X 2 each independently represent a halogen atom, and examples thereof include the same halogen atoms as may be substituted for the hydrogen atom of the phenylene group.
- Examples of the compound (4) include bis (4-chlorophenyl) sulfone and 4-chlorophenyl-3 ', 4'-dichlorophenylsulfone.
- Examples of the compound (5) include bis (4-hydroxyphenyl) sulfone, bis (4-hydroxy-3,5-dimethylphenyl) sulfone and bis (4-hydroxy-3-phenylphenyl) sulfone.
- Examples of the compound (6) include 2,2-bis (4-hydroxyphenyl) propane, 2,2-bis (4-hydroxyphenyl) hexafluoropropane, bis (4-hydroxyphenyl) sulfide, bis (4- Hydroxy-3-methylphenyl) sulfide and bis (4-hydroxyphenyl) ether.
- Examples of the compound (7) include hydroquinone, resorcin, catechol, phenylhydroquinone, 4,4′-dihydroxybiphenyl, 2,2′-dihydroxybiphenyl, 3,5,3 ′, 5′-tetramethyl-4,4 Examples include '-dihydroxybiphenyl, 2,2'-diphenyl-4,4'-dihydroxybiphenyl and 4,4'-dihydroxy-p-quarterphenyl.
- hydroquinone, resorcin, catechol, phenylhydroquinone, 2,2′-dihydroxybiphenyl, 3,5,3 ′, 5′-tetramethyl-4,4′-dihydroxybiphenyl, 2,2′-diphenyl-4, 4'-dihydroxybiphenyl and 4,4'-dihydroxy-p-quarterphenyl are preferred.
- aromatic dihalogenosulfone compounds other than the compound (4) examples include 4,4'-bis (4-chlorophenylsulfonyl) biphenyl.
- a halogeno group and a hydroxy group in the molecule such as 4-hydroxy-4 ′-(4-chlorophenylsulfonyl) biphenyl, are used.
- a compound having a group can also be used.
- either the aromatic dihalogenosulfone compound or the aromatic dihydroxy compound may be used alone or in combination of two or more. May be.
- the polycondensation of the aromatic dihalogenosulfone compound and the aromatic dihydroxy compound is preferably performed using an alkali metal salt of carbonic acid as a base.
- the polycondensation solvent is preferably carried out in an organic solvent, more preferably an alkali metal carbonate is used as the base, and more preferably carried out in an organic solvent.
- the alkali metal carbonate may be an alkali carbonate (alkali metal carbonate) which is a normal salt, or an alkali bicarbonate (alkali hydrogen carbonate, alkali metal hydrogen carbonate) which is an acidic salt. It may be a mixture of these (alkali carbonate and alkali bicarbonate).
- alkali carbonates include sodium carbonate and potassium carbonate.
- preferable alkali bicarbonate include sodium bicarbonate (sodium bicarbonate), potassium bicarbonate (potassium bicarbonate) and the like.
- a base may be used individually by 1 type and may use 2 or more types together.
- the polycondensation of the aromatic dihalogenosulfone compound and the aromatic dihydroxy compound is preferably performed using Compound A as the organic solvent.
- an aromatic dihalogenosulfone compound and an aromatic dihydroxy compound are dissolved in Compound A.
- an alkali metal salt of carbonic acid is added to the solution obtained in the first stage to cause a polycondensation reaction between the aromatic dihalogenosulfone compound and the aromatic dihydroxy compound.
- unreacted base, by-product (an alkali halide when an alkali metal salt is used as a base) and excess compound A are removed from the reaction mixture obtained in the second stage.
- the melting temperature in the first stage is preferably 40 ° C. or higher and 180 ° C. or lower.
- the reaction temperature of the second stage polycondensation is preferably 180 ° C. or higher and 400 ° C. or lower. If no side reaction occurs, the higher the polycondensation temperature, the faster the target polycondensation proceeds, and the higher the degree of polymerization of the resulting aromatic polysulfone. As a result, the aromatic polysulfone has a high reduced viscosity. Tend to be. However, in fact, the higher the polycondensation temperature, the more likely the side reaction similar to the above occurs, and this side reaction reduces the degree of polymerization of the aromatic polysulfone obtained.
- the polycondensation temperature It is necessary to adjust the polycondensation temperature so that an aromatic polysulfone having a predetermined reduced viscosity can be obtained.
- the predetermined reduced viscosity include reduced viscosities falling within a range of 0.30 to 0.80, which is a preferable range of the reduced viscosity, and a range of 0.40 to 0.80, which is a more preferable range.
- the blending ratio of the aromatic dihalogenosulfone compound to the aromatic dihydroxy compound is preferably 80 mol% or more and 120 mol% or less, and more preferably 90 mol% or more and 110 mol% or less.
- the use ratio of the alkali metal carbonate of carbonic acid relative to the aromatic dihydroxy compound is preferably 90 mol% or more and 130 mol% or less, more preferably 95 mol% or more and 120 mol% or less as an alkali metal.
- the temperature is gradually raised while removing by-product water, and after reaching the reflux temperature of Compound A, it is preferably 1 hour to 50 hours, more preferably 2 hours. It may be performed by keeping the temperature for 30 hours or less.
- the side reaction does not occur, the longer the polycondensation time, the more the target polycondensation proceeds, so the degree of polymerization of the resulting aromatic polysulfone increases, and as a result, the aromatic polysulfone tends to have a reduced viscosity. is there.
- the longer the polycondensation time the more the same side reaction proceeds as described above, and this side reaction reduces the degree of polymerization of the resulting aromatic polysulfone. It is necessary to adjust the polycondensation time so as to obtain an aromatic polysulfone having a reduced viscosity of 5%.
- compound A may be reduced directly from an aromatic polysulfone solution under reduced pressure or pressure.
- the above-mentioned solution is mixed with a poor solvent for aromatic polysulfone to precipitate aromatic polysulfone, and compound A is removed by filtration, centrifugation, or the like.
- it is preferable to obtain an aromatic polysulfone composition by repeatedly washing the above-described precipitate with a poor solvent.
- the aromatic polysulfone precipitated in the poor solvent exists as a mixed precipitate containing the aromatic polysulfone and the compound A in the poor solvent. Therefore, when the solution (aromatic polysulfone solution + poor solvent) in which aromatic polysulfone is precipitated is filtered or centrifuged, the mixed precipitate and the solvent (compound A + poor solvent) are separated, and a mixed precipitate is obtained. .
- the compound A When the obtained mixed precipitate is dispersed in a poor solvent, the compound A is eluted from the mixed precipitate toward the poor solvent around the mixed precipitate. At the same time, the poor solvent around the mixed precipitate penetrates into the mixed precipitate. Such movement of the poor solvent and the compound A is performed until the concentration of the compound A is equal in the mixed precipitate and in the dispersion medium around the mixed precipitate in the dispersion system in which the mixed precipitate is dispersed in the poor solvent. That is, it continues until equilibrium is reached in the mixed precipitate and the dispersion medium around the mixed precipitate.
- the movement of the solvent (compound A + poor solvent) in the dispersion is balanced based on these amounts.
- the amount of Compound A remaining in the mixed precipitate can be estimated.
- the amount of the compound A remaining in the mixed precipitate can be controlled by controlling the amount of the poor solvent used for the cleaning.
- the mixture precipitates are separated from the surroundings when the movement of the solvent in the dispersion reaches equilibrium.
- the amount of Compound A eluted toward the poor solvent can be suppressed, and a large amount of Compound A can remain in the mixed precipitate.
- the amount of poor solvent used, the washing time, the washing temperature, the number of washings, and the stirring speed can be adjusted so that an aromatic polysulfone composition containing a predetermined amount of Compound A is obtained.
- the content of Compound A is reduced by increasing the amount of the poor solvent used, increasing the cleaning time until the above equilibrium is reached, increasing the cleaning temperature, increasing the number of times of cleaning, or increasing the stirring speed. be able to. Two or more of the above operations may be combined.
- the poor solvent for aromatic polysulfone examples include methanol, ethanol, isopropyl alcohol, hexane, heptane and water, and water and methanol are preferable because they are inexpensive.
- the poor solvent of aromatic polysulfone may be used individually by 1 type, and may use 2 or more types together.
- the thickness of the resin film according to the present embodiment is less than 100 ⁇ m, preferably 3 ⁇ m or more and less than 100 ⁇ m, more preferably 3 ⁇ m or more and 10 ⁇ m or less.
- the thickness of the resin film can be obtained by measuring at any three points in the resin film with a micrometer and calculating the average value.
- Examples of the method for producing a resin film according to this embodiment include a method for producing a resin film by the solution casting method or the melt extrusion method using the above-described composition.
- One aspect of the present invention is a method for producing a resin film described below.
- ⁇ 1> a step of applying an aromatic polysulfone and an aromatic polysulfone composition containing an organic compound having a boiling point of 250 ° C. or higher and 400 ° C. or lower to a substrate;
- a process for drying and heat-treating the applied aromatic polysulfone composition, and a method for producing a resin film comprising: The manufacturing method of the resin film in which the said organic compound is contained 500 ppm or more and 4000 ppm or less with respect to the mass of the said aromatic polysulfone, and thickness is less than 100 micrometers.
- the aromatic polysulfone composition is the aromatic polysulfone composition in which the organic compound is contained in an amount of 500 ppm to 5000 ppm with respect to the mass of the aromatic polysulfone.
- the aromatic polysulfone composition containing 500 ppm or more and 5000 ppm or less of the organic compound with respect to the mass of the aromatic polysulfone refers to the aromatic polysulfone composition before the step of applying to the substrate.
- a solution is prepared by dissolving the composition according to this embodiment in a solvent.
- a solvent for example, an aprotic polar solvent is preferable.
- the aprotic polar solvent include sulfoxides such as dimethyl sulfoxide; amides such as dimethylformamide, dimethylacetamide and N-methyl-2-pyrrolidone; sulfones such as dimethylsulfone, diethylsulfone and diisopropylsulfone; 1,3-dimethyl- Examples thereof include 2-imidazolidinone and 1,3-diethyl-2-imidazolidinone, which have a urea skeleton in which a hydrogen atom bonded to a nitrogen atom may be substituted. It does not specifically limit as a method of dissolving a composition in a solvent, A conventionally well-known method can be used.
- the content of Compound A as a resin film can be prepared by adding Compound A to the above solution.
- the desired amount of compound A is added to the solution used for the production, whereby the content of compound A Can be prepared.
- the solution according to the present embodiment may contain a known filler or additive as long as the effects of the present invention are not impaired.
- a known filler or additive as long as the effects of the present invention are not impaired.
- an inorganic filler is preferable because the mechanical strength of the obtained resin film can be further improved.
- the obtained solution may be filtered through a filter or the like as necessary to remove fine foreign matters contained in the solution.
- the obtained solution is applied to a substrate to form a coating film.
- the coating method include a roller coating method, a dip coater method, a spray coater method, a spin coating method, a curtain coating method, a slot coating method, and a screen printing method.
- the solvent remaining on the coating film is removed by subjecting the coating film on the substrate to surface drying and heat treatment.
- the heat treatment in two stages of surface drying and heat treatment.
- the drying method include a method of drying by heating, decompression and ventilation. In these, since it is excellent in production efficiency and handleability, the method of drying by heating is preferable, and it is more preferable to dry by heating, ventilating.
- the drying temperature of the coating film surface is preferably 60 to 160 ° C., more preferably 60 to 150 ° C., and further preferably 60 to 140 ° C. When the drying temperature is within the above range, defects are hardly generated on the coating film surface, and it is difficult to take time required for drying, so that productivity is hardly lowered.
- the treatment temperature is preferably 200 to 350 ° C.
- the lower limit of the treatment temperature is more preferably 250 ° C. or more, and further preferably 280 ° C. or more.
- the upper limit of the treatment temperature is more preferably 340 ° C. or less, and further preferably 330 ° C. or less. That is, the temperature of the heat treatment is preferably 250 ° C. to 340 ° C., more preferably 280 ° C. to 330 ° C.
- the treatment time is in the range of 10 minutes to 15 hours.
- the lower limit of the treatment time is more preferably 20 minutes or more, and particularly preferably 40 minutes or more.
- the upper limit of the treatment time is more preferably 12 hours or less, and particularly preferably 10 hours or less. That is, the treatment time is preferably in the range of 20 minutes to 12 hours, and more preferably in the range of 40 minutes to 10 hours.
- the heat treatment according to this embodiment is preferably performed in a space filled with an inert gas such as nitrogen, argon, or neon, or performed in a vacuum.
- an inert gas such as nitrogen, argon, or neon
- a resin film is obtained by peeling the coating film thus produced on the substrate from the substrate.
- the inspection process which measures content with respect to the mass of the aromatic polysulfone of the compound A in the obtained said resin film, and selects only the resin film containing predetermined content may be included.
- content with respect to aromatic polysulfone of the compound A in a resin film can be measured by the method as described in the below-mentioned Example.
- the predetermined content is 500 ppm to 4000 ppm, 600 ppm to 3500 ppm, more preferably 700 ppm to 3200 ppm, more preferably a content range of the compound A in the resin film with respect to the mass of the aromatic polysulfone.
- a preferred range is 750 ppm to 3000 ppm.
- One aspect of the present invention is a method for producing a resin film described below.
- ⁇ 1> a step of melt-kneading an aromatic polysulfone and an aromatic polysulfone composition containing an organic compound having a boiling point of 250 ° C. or higher and 400 ° C. or lower; Extruding the molten aromatic polysulfone composition to form a precursor film; Stretching the precursor film, and a method for producing a resin film comprising: The manufacturing method of the resin film in which the said organic compound is contained 500 ppm or more and 4000 ppm or less with respect to the mass of the said aromatic polysulfone, and thickness is less than 100 micrometers.
- the aromatic polysulfone composition is the aromatic polysulfone composition in which the organic compound is contained in an amount of 500 ppm to 5000 ppm with respect to the mass of the aromatic polysulfone.
- the aromatic polysulfone composition containing 500 ppm or more and 5000 ppm or less of the organic compound with respect to the mass of the aromatic polysulfone refers to the aromatic polysulfone composition before the melt-kneading step.
- FIG. 1 is a schematic diagram showing an arrangement example of apparatuses used when a resin film according to this embodiment is manufactured by a melt extrusion method.
- the composition according to this embodiment is melt-kneaded by an extrusion experimental machine. As shown in FIG. 1, the composition melted by the coat hanger die 1 is extruded to form a precursor film 10.
- the precursor film 10 is cooled by the first cooling roll 2 and the second cooling roll 3 to produce the resin film 11.
- the temperature of the coat hanger die 1 is preferably 330 to 400 ° C., more preferably 350 to 380 ° C. If the temperature of the coat hanger die 1 is too low, the coat hanger die 1 may be stretched by pulling out after leaving the coat hanger die 1, and the optical main axis may be oriented in the flow direction. If the temperature of the coat hanger die 1 is too high, the temperature difference from the first cooling roll 2 becomes large, so that cooling wrinkles may occur on the first cooling roll 2 or optical characteristics may be uneven.
- the temperature of the first cooling roll 2 and the second cooling roll 3 is uniformly controlled.
- the temperature of the first cooling roll 2 is preferably lower than the temperature of the coat hanger die 1.
- the temperature of the second cooling roll 3 is preferably lower than the temperature of the first cooling roll 2.
- the speed of the 1st cooling roll 2 and the 2nd cooling roll 3 is constant, and is adjusted with the thickness of the precursor film 10, respectively.
- the resin film according to the present embodiment is obtained.
- the inspection step of measuring the content of the compound A in the obtained resin film with respect to the mass of the aromatic polysulfone and selecting only the resin film having a predetermined content may be included. .
- a resin film excellent in mechanical strength such as toughness is provided.
- the laminated film according to this embodiment has a layer made of the above-described resin film and a layer made of a conductor.
- the laminated film has a structure in which a layer made of the resin film is laminated on at least one surface of the layer made of the conductor.
- the resin film is preferably as thick as possible.
- the laminated film only needs to have at least one layer composed of a conductor and one layer composed of a resin film. When two or more layers composed of the conductor or the resin film are provided, the conductor layer and the resin film layer are alternately laminated.
- the thickness of the resin film is not particularly limited, but is preferably 3 ⁇ m or more and less than 100 ⁇ m, more preferably 3 ⁇ m or more and 10 ⁇ m or less.
- examples of the layer made of a conductor include metal foil.
- examples of the metal foil include a metal foil made of gold, silver, copper, aluminum, or nickel, and a copper foil is preferable.
- the thickness of the metal foil is preferably 5 to 100 ⁇ m, more preferably 5 to 60 ⁇ m, and still more preferably 5 to 30 ⁇ m.
- a manufacturing method of the laminated film which concerns on this embodiment the method of bonding the resin film and the layer which consists of a conductor is mentioned.
- a method for producing a laminated film there is a method in which a solution containing the composition is directly applied to a layer made of a conductor to produce a resin film on the layer made of a conductor.
- a laminated film can be easily formed by using the same method as the resin film manufacturing method by the solution casting method, except that a layer made of a conductor is used as the substrate and the coating film is not peeled off from the substrate. Can be produced.
- the surface on the side opposite to the layer made of the conductor of the resin film is subjected to polishing treatment, treatment with a chemical solution such as an acid or an oxidizing agent, ultraviolet irradiation treatment, plasma as necessary. Treatment such as irradiation may be performed.
- the substrate for a flexible printed wiring board includes the above-described laminated film. That is, the flexible printed wiring board substrate has the same structure as the laminated film in which the layer made of the resin film is laminated on one surface of the layer made of the conductor.
- the flexible printed wiring board has a conductive pattern formed by etching or the like on a surface opposite to the surface on which the layer made of the resin film of the flexible printed wiring board substrate is laminated, and the resin is applied to the conductive pattern.
- a cover lay which is an insulator made of a material is laminated.
- a conductive pattern is a pattern formed by a conductive material, which is a flexible printed wiring board, and forms part of a circuit. Etching is a technique for chemically and electrically removing unnecessary portions of the conductor to form the conductive pattern.
- a coverlay is a film coated to insulate and protect a conductor portion of a flexible printed wiring board. Examples of the resin material used as the coverlay include a polyimide resin film and the resin film of the present invention. When particularly high insulation is required for FPC applications, the thicker the resin film, the better.
- a flexible printed wiring board including the above-described resin film and excellent in mechanical strength is provided.
- the laminated film according to the present embodiment includes, in addition to the flexible printed wiring board substrate, a semiconductor package by a build-up method or the like, a multilayer printed circuit board film for a motherboard, a tape automated bondering film, a tag tape film, a microwave oven It can also be used for a packaging film for heating, an electromagnetic wave shielding film, a high-frequency printed wiring board, a high-frequency cable, a communication device circuit, a package substrate, and the like.
- the specific viscosity (( ⁇ - ⁇ 0 ) / ⁇ 0 ) is determined, and this value is calculated as the value of the aromatic polysulfone solution.
- the reduced viscosity (dL / g) of the aromatic polysulfone was determined by dividing by the concentration (about 1 g / dL). Usually, it can be said that it is so high molecular weight that the value of reduced viscosity is large.
- a resin film is pulverized so that the short side is 0.5 mm or less, and a known amount of pulverized resin film and a mixture of a known amount of acetone and methanol in a volume ratio of 1: 1 are mixed at room temperature for 4 hours or more. did.
- the concentration of Compound A in the mixture was calculated from the area ratio of gas chromatography.
- the content of Compound A in the resin film was calculated from the amount of the resin film and the mixed solution.
- the obtained reaction mixture solution is cooled to room temperature, solidified, and finely pulverized, and then washed with warm water and washed with a mixed solvent of acetone and methanol several times to thereby remove unreacted potassium carbonate and by-products.
- the produced potassium chloride was washed.
- the mixture was heated and dried at 150 ° C. to obtain a mixed precipitate (aromatic polysulfone + DPS) as a powder.
- the reduced viscosity of the obtained aromatic polysulfone was 0.41 dL / g, and the ratio of DPS to the mass of the aromatic polysulfone was 300 ppm.
- Example 1 In a 500 mL separable flask, 60 g of the mixed precipitate obtained in Production Example 1 and 240 g of N-methyl-2-pyrrolidone (hereinafter sometimes referred to as “NMP”) were placed, and stirred at 60 ° C. for 2 hours. A pale yellow aromatic polysulfone solution was obtained. By adding DPS to this solution, it was prepared so that 800 ppm of DPS was contained with respect to the mass of the aromatic polysulfone. The solution to which DPS was added was applied to a glass plate having a thickness of 3 mm using a film applicator and dried at 60 ° C. using a high-temperature hot air dryer to form a coating film.
- NMP N-methyl-2-pyrrolidone
- This coating film was heat-treated at 250 ° C. while flowing nitrogen to form a resin film having a thickness of 8 ⁇ m on the glass plate.
- the resin film of Example 1 was obtained by peeling this resin film from the glass plate.
- the thickness of the resin film was measured by “Micrometer PMU150-25MJ” (manufactured by Mitutoyo Corporation). Moreover, the measurement was performed for any three points of the resin film, and the average value was 8 ⁇ m.
- Example 2 A resin film of Example 2 was obtained in the same manner as in Example 1 except that DPS was added to the aromatic polysulfone solution so as to contain 3000 ppm of DPS with respect to the mass of the aromatic polysulfone. .
- Example 3 A 500 mL separable flask was charged with 75 g of the mixed precipitate obtained in Production Example 1 and 225 g of NMP, and stirred at 60 ° C. for 2 hours to obtain a pale yellow aromatic polysulfone solution. By adding DPS to this solution, it was prepared so that 800 ppm of DPS was contained with respect to the mass of the aromatic polysulfone. The solution to which DPS was added was applied to a glass plate having a thickness of 3 mm using a film applicator and dried at 60 ° C. using a high-temperature hot air dryer to form a coating film. This coating film was heat-treated at 250 ° C.
- the resin film of Example 3 was obtained by peeling this resin film from the glass plate.
- the thickness of the resin film was measured by “Micrometer PMU150-25MJ” (manufactured by Mitutoyo Corporation). Moreover, the measurement was performed for any three points on the resin film, and the average value was 8 ⁇ m.
- Example 4 A resin film of Example 4 was obtained in the same manner as in Example 3 except that DPS was added to the aromatic polysulfone solution so that DPS was included at 3000 ppm with respect to the mass of the aromatic polysulfone. It was.
- Comparative Example 1 A resin film of Comparative Example 1 was obtained in the same manner as in Example 1 except that DPS was not added to the aromatic polysulfone solution.
- Comparative Example 2 A resin film of Comparative Example 2 was obtained in the same manner as in Example 1 except that DPS was added to the aromatic polysulfone solution so as to contain 5000 ppm of DPS with respect to the mass of the aromatic polysulfone. .
- Comparative Example 3 A resin film of Comparative Example 3 was obtained in the same manner as in Example 3 except that DPS was not added to the aromatic polysulfone solution.
- Comparative Example 4 A resin film of Comparative Example 4 was obtained in the same manner as in Example 3 except that DPS was added to the aromatic polysulfone solution so as to contain 5000 ppm of DPS with respect to the mass of the aromatic polysulfone. .
- the DPS content with respect to the mass of the aromatic polysulfone in the compositions in the examples and comparative examples, the DPS content with respect to the mass of the aromatic polysulfone in the resin film, the thickness of the resin film, and the number of bendings of the resin film are shown. 2 and Table 3.
- Example 3 and Example 4 shown in Table 3 since the ratio of DPS to the mass of the aromatic polysulfone was 500 ppm or more and 4000 ppm or less, the obtained resin film was excellent in toughness. Since all the resin films obtained in the above examples were less than 100 ⁇ m, they were excellent in toughness regardless of the thickness of the resin film.
- the resin film using the aromatic polysulfone of the present invention as a molding material, the laminated film including the resin film, and the flexible printed wiring board have high toughness, excellent mechanical strength, and are useful.
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Abstract
Description
本願は2016年2月10日に、日本に出願された特願2016-23701号、及び2016年7月14日に、日本に出願された特願2016-139739号に基づき優先権を主張し、その内容をここに援用する。
-Ph1-SO2-Ph2-O- (1)
[式(1)中、Ph1及びPh2は、フェニレン基を表し、前記フェニレン基に結合する1個以上の水素原子が、互いに独立に、炭素数1~10のアルキル基、炭素数6~20のアリール基又はハロゲン原子で置換されていてもよい。]
<1>芳香族ポリスルホンを形成材料とする樹脂フィルムであって、
前記樹脂フィルムの厚さは、100μm未満であり、
前記樹脂フィルムは、沸点が250℃以上400℃以下である有機化合物をさらに含み、
前記有機化合物は、前記芳香族ポリスルホンの質量に対して500ppm以上4000ppm以下含まれる樹脂フィルム。
<2>前記芳香族ポリスルホンが、式(1)で表される繰返し単位を有し、
前記芳香族ポリスルホンを構成する全繰返し単位の合計量に対して、式(1)で表される繰返し単位を80~100モル%有する前記<1>に記載の樹脂フィルム。
-Ph1-SO2-Ph2-O- (1)
[式(1)中、Ph1及びPh2は、フェニレン基を表し、前記フェニレン基に結合する1個以上の水素原子が、互いに独立に、炭素数1~10のアルキル基、炭素数6~20のアリール基又はハロゲン原子で置換されていてもよい。]
<3>前記有機化合物は、ハンセン溶解度パラメータにおける分散項δD(単位:MPa0.5)が16.0以上22.0以下、極性項δP(単位:MPa0.5)が12.0以上16.4以下、水素結合項δH(単位:MPa0.5)が3.0以上12.0以下である前記<1>又は<2>に記載の樹脂フィルム。
<4>前記有機化合物は、非プロトン性極性溶媒である前記<1>~<3>のいずれか1項に記載の樹脂フィルム。
<5>前記有機化合物は、ジフェニルスルホンである前記<1>~<4>のいずれか1項に記載の樹脂フィルム。
<6>前記<1>~<5>のいずれか1項に記載の樹脂フィルムからなる層と、導体からなる層と、を有する積層フィルム。
<7>前記<6>に記載の積層フィルムを含むフレキシブルプリント配線板用基板。
また、この樹脂フィルムを含む、靱性などの機械的強度に優れた積層フィルムが提供される。さらに、この積層フィルムを含む、靱性などの機械的強度に優れたフレキシブルプリント配線用基板が提供される。
本実施形態に係る樹脂フィルムは、芳香族ポリスルホンを形成材料とする、厚さが100μm未満のフィルムである。樹脂フィルムは、沸点が250℃以上400℃以下である有機化合物(以下、「化合物A」ということがある。)をさらに含み、化合物Aは、芳香族ポリスルホンの質量に対して500ppm以上4000ppm以下、好ましくは600ppm以上3500ppm以下、より好ましくは700ppm以上3200ppm以下、さらに好ましくは800ppm以上3000ppm以下含まれる。
本発明の一つの側面は、芳香族ポリスルホン及び沸点が250℃以上400℃以下である有機化合物を含む芳香族ポリスルホン組成物から成形された樹脂フィルムであって、前記有機化合物が前記芳香族ポリスルホンの質量に対して500ppm以上4000ppm以下含まれ、厚さが100μm未満の樹脂フィルムである。
本実施形態において、芳香族ポリスルホンは、典型的には、2価の芳香族基(芳香族化合物から、その芳香環に結合した水素原子を2個除いてなる残基)と、スルホニル基(-SO2-)と、酸素原子とを含む繰返し単位を有する樹脂である。2価の芳香族基の例としては、フェニレン基、ナフタレンジイル基等が挙げられ、好ましい例としてはフェニレン基が挙げられ、これら基は置換基を有していてもよい。
[式(1)中、Ph1及びPh2は、フェニレン基を表し、前記フェニレン基の1個以上の水素原子は、互いに独立に、炭素数1~10のアルキル基、炭素数6~20のアリール基又はハロゲン原子で置換されていてもよい。]
[式(2)中、Ph3及びPh4は、フェニレン基を表し、前記フェニレン基の1個以上の水素原子は、互いに独立に、炭素数1~10のアルキル基、炭素数6~20のアリール基又はハロゲン原子で置換されていてもよい。Rは、炭素数1~5のアルキリデン基、酸素原子又は硫黄原子である。]
[式(3)中、Ph5は、フェニレン基を表し、前記フェニレン基の1個以上の水素原子は、互いに独立に、炭素数1~10のアルキル基、炭素数6~20のアリール基又はハロゲン原子で置換されていてもよい。nは、1~3の整数であり、nが2以上である場合、複数存在するPh5は、互いに同一でも異なっていてもよい。]
本実施形態に係る化合物Aの沸点は、250℃以上400℃以下であり、350℃以上400℃以下であることが好ましい。
本明細書において、沸点の測定は、公知の方法を適用できる他、単体の場合には、化学便覧等の文献中に記載の値も参照することができる。なお、本明細書における沸点は1気圧において測定した値で表される。
本発明の別の側面としては、化合物のAのハンセン溶解度パラメータにおける分散項δD(単位:MPa0.5)は18.0以上22.0以下であることが好ましく、19.0以上22.0以下であることがより好ましい。
化合物Aのハンセン溶解度パラメータにおける極性項δP(単位:MPa0.5)は、12.0以上16.4以下であることが好ましく、12.0以上15.0以下であることがより好ましく、12.0以上14.5以下であることがさらに好ましい。
化合物Aのハンセン溶解度パラメータにおける水素結合項δH(単位:MPa0.5)は、3.0以上12.0以下であることが好ましく、3.0以上8.0以下であることがより好ましく、7.0以上8.0以下であることがさらに好ましい。
本発明の別の側面としては、化合物Aのハンセン溶解度パラメータにおける水素結合項δH(単位:MPa0.5)は、3.0以上4.0以下であることが好ましい。
本実施形態に係る樹脂フィルムは、芳香族ポリスルホンと化合物Aとを含む組成物から形成される。樹脂フィルムの製造方法としては、後述する溶液キャスト法、溶融押出法等が例として挙げられる。この組成物は、芳香族ポリスルホンの質量に対して化合物Aを500ppm以上4000ppm以下、好ましくは600ppm以上3500ppm以下、より好ましくは700ppm以上3200ppm以下、さらに好ましくは800ppm以上3000ppm以下含む。芳香族ポリスルホンの質量に対する、化合物Aの含有量が500ppm以上であると、化合物Aが可塑剤として十分に機能するため、樹脂フィルムとしたときに靱性などの機械的強度に優れる。一方、芳香族ポリスルホンの質量に対する、化合物Aの含有量が4000ppmを超えると、樹脂フィルムとしたときに靱性などの機械的強度に劣る。すなわち、芳香族ポリスルホンの質量に対する、化合物Aの含有量が4000ppm以下では、樹脂フィルムとしたときに靱性などの機械的強度に優れる。したがって、本実施形態に係る組成物は、化合物Aを上述の範囲で含むことにより、樹脂フィルムとしたときに靱性などの機械的強度に優れる。本明細書において靱性は後述の実施例に記載の方法により測定することができる。
以下、本実施形態に係る組成物の製造方法の一例について詳述する。
本実施形態に係る組成物の製造方法は、芳香族ジハロゲノスルホン化合物、芳香族ジヒドロキシ化合物、塩基及び有機溶媒を配合し、芳香族ジハロゲノスルホン化合物と芳香族ジヒドロキシ化合物を重縮合反応させることにより、組成物を製造する方法である。
[式(4)中、X1及びX2は、互いに独立に、ハロゲン原子を表す。Ph1及びPh2は、前記と同義である。]
[式(5)中、Ph1及びPh2は、前記と同義である。]
[式(6)中、Ph3、Ph4及びRは、前記と同義である。]
[式(7)中、Ph5及びnは、前記と同義である。]
本実施形態において、芳香族ポリスルホンの貧溶媒は、1種を単独で用いてもよいし、2種以上を併用してもよい。
本実施形態に係る樹脂フィルムの厚さは、100μm未満であり、好ましくは3μm以上100μm未満であり、より好ましくは3μm以上10μm以下である。樹脂フィルムの厚さが上述の範囲であることにより、樹脂フィルムの安定的な生産が可能となる。本明細書において樹脂フィルムの厚さは、マイクロメータにより、樹脂フィルム中の任意の3点において測定し、その平均値を算出することにより得ることができる。
本実施形態に係る樹脂フィルムの作製方法としては、例えば上述の組成物を用いて、溶液キャスト法又は溶融押出法により樹脂フィルムを作製する方法が挙げられる。
本発明の一つの側面は、以下に示す樹脂フィルムの製造方法である。
<1>芳香族ポリスルホン、及び沸点が250℃以上400℃以下の有機化合物を含む芳香族ポリスルホン組成物を、基板に塗布する工程と、
前記塗布された芳香族ポリスルホン組成物を乾燥処理、及び加熱処理をする工程と、を含む樹脂フィルムの製造方法であって、
前記有機化合物が前記芳香族ポリスルホンの質量に対して500ppm以上4000ppm以下含まれ、厚さが100μm未満の樹脂フィルムの製造方法。
<2>前記芳香族ポリスルホン組成物は、前記有機化合物が前記芳香族ポリスルホンの質量に対して500ppm以上5000ppm以下含まれる前記芳香族ポリスルホン組成物である前記<1>に記載の樹脂フィルム製造方法。
有機化合物が芳香族ポリスルホンの質量に対して、500ppm以上5000ppm以下含まれる芳香族ポリスルホン組成物とは、前記基板に塗布する工程前の芳香族ポリスルホン組成物を指す。
以下、上述の組成物を用いて、溶液キャスト法により樹脂フィルムを作製する方法の一例について説明する。
本実施形態において、得られた前記樹脂フィルム中の化合物Aの芳香族ポリスルホンの質量に対する含有量を測定し、所定の含有量を含む樹脂フィルムのみを選別する検品工程が含まれていてもよい。本明細書において、樹脂フィルム中の化合物Aの芳香族ポリスルホンに対する含有量は後述の実施例に記載の方法により測定することができる。所定の含有量としては、前記した樹脂フィルム中の化合物Aの芳香族ポリスルホンの質量に対する含有量の好ましい範囲である500ppm以上4000ppm以下、600ppm以上3500ppm以下、より好ましい範囲である700ppm以上3200ppm以下、さらに好ましい範囲である750ppm以上3000ppmに収まる含有量が挙げられる。
本発明の一つの側面は、以下に示す樹脂フィルムの製造方法である。
<1>芳香族ポリスルホン、及び沸点が250℃以上400℃以下の有機化合物を含む芳香族ポリスルホン組成物を溶融混練する工程と、
前記溶融した芳香族ポリスルホン組成物を押し出して前駆体フィルムを成形する工程と、
前記前駆体フィルムを延伸する工程と、を含む樹脂フィルムの製造方法であって、
前記有機化合物が前記芳香族ポリスルホンの質量に対して、500ppm以上4000ppm以下含まれ、厚さが100μm未満の樹脂フィルムの製造方法。
<2>前記芳香族ポリスルホン組成物は、前記有機化合物が前記芳香族ポリスルホンの質量に対して、500ppm以上5000ppm以下含まれる前記芳香族ポリスルホン組成物である前記<1>に記載の樹脂フィルム製造方法。
有機化合物が芳香族ポリスルホンの質量に対して、500ppm以上5000ppm以下含まれる前記芳香族ポリスルホン組成物とは、前記溶融混練する工程前の芳香族ポリスルホン組成物を指す。
以下、上述の組成物を用いて、溶融押出法により樹脂フィルムを作製する方法の一例について、図1を参照しながら説明する。
本実施形態において、得られた前記樹脂フィルム中の化合物Aの芳香族ポリスルホンの質量に対する含有量を測定し、所定の含有量を含む樹脂フィルムのみを選別する前記検品工程が含まれていてもよい。
積層フィルムは、導体からなる層、及び樹脂フィルムからなる層をそれぞれ1層以上有していればよい。前記導体からなる層、又は前記樹脂フィルムからなる層を2層以上有している場合は前記導体からなる層と、前記樹脂フィルムからなる層が交互に積層された構造をとる。
樹脂フィルムの厚みは、特に限定されないが、好ましくは3μm以上100μm未満、さらに好ましくは3μm以上10μm以下である。
本実施形態に係る積層フィルムの製造方法としては、樹脂フィルムと導体からなる層とを貼り合わせる方法が挙げられる。積層フィルムの他の製造方法としては、組成物を含む溶液を、導体からなる層に直接塗布して、導体からなる層上に樹脂フィルムを作製する方法が挙げられる。このような場合、基材として導体からなる層を用いることと、基材から塗膜を剥離しないこと以外は、溶液キャスト法による樹脂フィルムの製造方法と同様にして行うことで、容易に積層フィルムを作製できる。
本実施形態に係るフレキシブルプリント配線板(以下、「FPC」ということがある。)用基板は、上述の積層フィルムを含む。すなわち、フレキシブルプリント配線板用基板は、前記導体からなる層の一方の面に、前記樹脂フィルムからなる層が積層された前記積層フィルムと同様の構造を有する。フレキシブルプリント配線板は、前記フレキシブルプリント配線板用基板の導体からなる層の樹脂フィルムからなる層が積層された面とは反対の面に、エッチング等で導電パターンを形成し、前記導電パターンに樹脂材料からなる絶縁体であるカバーレイを積層して構成される。導電パターンとは、フレキシブルプリント配線板で、導電性材料が形成するパターンであり、回路の一部を形成する。エッチングとは前記導体の不要部分を化学的、電気的に除去し、前記導電パターンを形成するための手法である。カバーレイとは、フレキシブルプリント配線板の導体部を絶縁保護するために被覆したフィルムである。カバーレイとして使用される樹脂材料としては、ポリイミド樹脂フィルム、本発明の樹脂フィルムが挙げられる。
FPC用途として特に高い絶縁性が要求される場合には、樹脂フィルムは厚いほど好ましい。
本発明の技術範囲は、上記実施形態に限定されず、本発明の効果を損なわない範囲において、種々の変更を加えることができる。
なお、芳香族ポリスルホンの還元粘度の測定、組成物に含まれる化合物Aの定量分析、樹脂フィルムに含まれる化合物Aの定量分析及び樹脂フィルムの靱性評価は、それぞれ以下の方法で行った。
芳香族ポリスルホン約1gをN,N-ジメチルホルムアミド(試薬特級)に溶解させて、その容量を1dLとし、この溶液の粘度(η)を、オストワルド型粘度管を用いて、25℃で測定した。また、溶媒であるN,N-ジメチルホルムアミドの粘度(η0)を、オストワルド型粘度管を用いて、25℃で測定した。芳香族ポリスルホン溶液の粘度(η)とN,N-ジメチルホルムアミドの粘度(η0)から、比粘性率((η-η0)/η0) を求め、この値を、芳香族ポリスルホン溶液の濃度(約1g/dL)で割ることにより、芳香族ポリスルホンの還元粘度(dL/g)を求めた。
通常は、還元粘度の値が大きいほど高分子量であるといえる。
既知量の組成物と、既知量のメタノールを室温で2時間以上混合した。メタノール中における化合物Aの濃度をガスクロマトグラフィーの面積比から算出した。次いで、組成物及びメタノールの量から、組成物中の化合物Aの含有量を算出した。
樹脂フィルムを短辺が0.5mm以下となるように粉砕し、既知量の粉砕した樹脂フィルムと、既知量のアセトンとメタノールを体積比1:1で混合した混合液を室温で4時間以上混合した。混合液中における化合物Aの濃度をガスクロマトグラフィーの面積比から算出した。次いで、この樹脂フィルム及び混合液の量から、樹脂フィルム中の化合物Aの含有量を算出した。
撹拌機、窒素導入管、温度計、及び先端に受器を付したコンデンサーを備えた重合槽に、4,4’-ジヒドロキシジフェニルスルホン100.1g、4,4’-ジクロロジフェニルスルホン119.0g、及び化合物Aとしてジフェニルスルホン(以下、「DPS」ということがある。)194.3gを入れた。この混合溶液に窒素ガスを流通させながら180℃まで昇温し、さらに炭酸カリウム57.5gを添加した。この溶液を290℃まで徐々に昇温し、290℃で4時間反応させた。次いで、得られた反応混合溶液を、室温まで冷却して、固化させ、細かく粉砕した後、温水による洗浄及びアセトンとメタノールの混合溶媒による洗浄を数回行うことにより、未反応の炭酸カリウム及び副生した塩化カリウムを洗浄した。洗浄後、150℃で加熱乾燥することにより、混合析出物(芳香族ポリスルホン+DPS)を粉末として得た。得られた芳香族ポリスルホンの還元粘度は0.41dL/g、芳香族ポリスルホンの質量に対するDPSの割合は300ppmであった。
500mLセパラブルフラスコに、製造例1で得られた混合析出物60g及びN-メチル-2-ピロリドン(以下、「NMP」ということがある。)240gを入れ、60℃で2時間撹拌して、淡黄色の芳香族ポリスルホン溶液を得た。この溶液に、DPSを添加することにより、芳香族ポリスルホンの質量に対してDPSが800ppm含まれるように調製した。DPSを添加した溶液を、厚さ3mmのガラス板状にフィルムアプリケーターを用いて塗布し、高温熱風乾燥器を用いて60℃で乾燥して、塗膜を形成した。この塗膜を、窒素を流しながら250℃で熱処理して、ガラス板上に厚さ8μmの樹脂フィルムを形成した。この樹脂フィルムをガラス板から剥離することにより、実施例1の樹脂フィルムを得た。
樹脂フィルムの厚さを”マイクロメータPMU150-25MJ”(株式会社ミツトヨ製)によって測定した。また、測定は樹脂フィルムの任意の3点につき行い、その平均値は8μmであった。
芳香族ポリスルホン溶液にDPSを添加することにより、芳香族ポリスルホンの質量に対してDPSが3000ppm含まれるように調製した以外は、実施例1と同様にして行い、実施例2の樹脂フィルムを得た。
500mLセパラブルフラスコに、製造例1で得られた混合析出物75g及びNMP225gを入れ、60℃で2時間撹拌して、淡黄色の芳香族ポリスルホン溶液を得た。この溶液に、DPSを添加することにより、芳香族ポリスルホンの質量に対してDPSが800ppm含まれるように調製した。DPSを添加した溶液を、厚さ3mmのガラス板状にフィルムアプリケーターを用いて塗布し、高温熱風乾燥器を用いて60℃で乾燥して、塗膜を形成した。この塗膜を、窒素を流しながら250℃で熱処理して、ガラス板上に厚さ75μmの樹脂フィルムを形成した。この樹脂フィルムをガラス板から剥離することにより、実施例3の樹脂フィルムを得た。樹脂フィルムの厚さを”マイクロメータPMU150-25MJ”(株式会社ミツトヨ製)によって測定した。また、測定は樹脂フィルム上の任意の3点につき行い、その平均値は8μmであった。
芳香族ポリスルホン溶液にDPSを添加することにより、芳香族ポリスルホンの質量に対してDPSが3000ppm含まれるように調製したこと以外は、実施例3と同様にして行い、実施例4の樹脂フィルムを得た。
芳香族ポリスルホン溶液にDPSを添加しなかったこと以外は、実施例1と同様にして行い、比較例1の樹脂フィルムを得た。
芳香族ポリスルホン溶液にDPSを添加することにより、芳香族ポリスルホンの質量に対してDPSが5000ppm含まれるように調製した以外は、実施例1と同様にして行い、比較例2の樹脂フィルムを得た。
芳香族ポリスルホン溶液にDPSを添加しなかったこと以外は、実施例3と同様にして行い、比較例3の樹脂フィルムを得た。
芳香族ポリスルホン溶液にDPSを添加することにより、芳香族ポリスルホンの質量に対してDPSが5000ppm含まれるように調製した以外は、実施例3と同様にして行い、比較例4の樹脂フィルムを得た。
実施例及び比較例で得られた樹脂フィルムの靱性評価は、JIS P 8115のMIT試験機法により行い、樹脂フィルムが破断するまでの屈曲回数を求めた。この評価において、樹脂フィルムの屈曲回数が多いほど、樹脂フィルムは靱性に優れることを意味する。なお、実施例1、実施例2、比較例1及び比較例2における樹脂フィルムの靱性評価は評価1に示す方法で実施した。実施例3、実施例4、比較例3及び比較例4における樹脂フィルムの靱性評価は評価2に示す方法で実施した。
実施例1、実施例2、比較例1及び比較例2の樹脂フィルムから、13cm×1cmの試験片を切り出した。この試験片を用いて、MIT耐疲労試験機(東洋精機(株)製)により、曲げ半径3.0mm、荷重2.0Nの条件で屈曲試験を行い、試験片が破断するまでの屈曲回数を求めた。同じ試験を3回行い、その平均値を算出した。
実施例3、実施例4、比較例3及び比較例4の樹脂フィルムを用いて、曲げ半径0.38mm、荷重4.9Nとする以外は、評価1と同様にして行った。
Claims (7)
- 芳香族ポリスルホンを形成材料とする樹脂フィルムであって、
前記樹脂フィルムの厚さは、100μm未満であり、
前記樹脂フィルムは、沸点が250℃以上400℃以下である有機化合物をさらに含み、
前記有機化合物は、前記芳香族ポリスルホンの質量に対して500ppm以上4000ppm以下含まれる樹脂フィルム。 - 前記芳香族ポリスルホンが、式(1)で表される繰返し単位を有し、
前記芳香族ポリスルホンを構成する全繰返し単位の合計量に対して、式(1)で表される繰返し単位を80~100モル%有する請求項1に記載の樹脂フィルム。
-Ph1-SO2-Ph2-O- (1)
[式(1)中、Ph1及びPh2は、フェニレン基を表し、前記フェニレン基に結合する1個以上の水素原子が、互いに独立に、炭素数1~10のアルキル基、炭素数6~20のアリール基又はハロゲン原子で置換されていてもよい。] - 前記有機化合物は、ハンセン溶解度パラメータにおける分散項δD(単位:MPa0.5)が16.0以上22.0以下、極性項δP(単位:MPa0.5)が12.0以上16.4以下、水素結合項δH(単位:MPa0.5)が3.0以上12.0以下である請求項1又は2に記載の樹脂フィルム。
- 前記有機化合物は、非プロトン性極性溶媒である請求項1~3のいずれか1項に記載の樹脂フィルム。
- 前記有機化合物は、ジフェニルスルホンである請求項1~4のいずれか1項に記載の樹脂フィルム。
- 請求項1~5のいずれか1項に記載の樹脂フィルムからなる層と、導体からなる層と、を有する積層フィルム。
- 請求項6に記載の積層フィルムを含むフレキシブルプリント配線板用基板。
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH10182855A (ja) * | 1996-12-24 | 1998-07-07 | Sumitomo Chem Co Ltd | ポリエーテルスルホン樹脂フィルムの製造方法 |
JPH11167023A (ja) * | 1997-12-03 | 1999-06-22 | Kanegafuchi Chem Ind Co Ltd | ポリスルフォン位相差フィルム製造方法 |
JPH11167022A (ja) * | 1997-12-02 | 1999-06-22 | Sekisui Chem Co Ltd | 位相差板の製造方法 |
JP2003321556A (ja) * | 2002-03-01 | 2003-11-14 | Sumitomo Chem Co Ltd | 芳香族ポリサルホン樹脂フィルム及びその製造方法 |
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10182855A (ja) * | 1996-12-24 | 1998-07-07 | Sumitomo Chem Co Ltd | ポリエーテルスルホン樹脂フィルムの製造方法 |
JPH11167022A (ja) * | 1997-12-02 | 1999-06-22 | Sekisui Chem Co Ltd | 位相差板の製造方法 |
JPH11167023A (ja) * | 1997-12-03 | 1999-06-22 | Kanegafuchi Chem Ind Co Ltd | ポリスルフォン位相差フィルム製造方法 |
JP2003321556A (ja) * | 2002-03-01 | 2003-11-14 | Sumitomo Chem Co Ltd | 芳香族ポリサルホン樹脂フィルム及びその製造方法 |
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