WO2020145346A1 - エステル化合物、樹脂組成物、硬化物、及び、ビルドアップフィルム - Google Patents
エステル化合物、樹脂組成物、硬化物、及び、ビルドアップフィルム Download PDFInfo
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- WO2020145346A1 WO2020145346A1 PCT/JP2020/000448 JP2020000448W WO2020145346A1 WO 2020145346 A1 WO2020145346 A1 WO 2020145346A1 JP 2020000448 W JP2020000448 W JP 2020000448W WO 2020145346 A1 WO2020145346 A1 WO 2020145346A1
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D209/00—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom
- C07D209/02—Heterocyclic compounds containing five-membered rings, condensed with other rings, with one nitrogen atom as the only ring hetero atom condensed with one carbocyclic ring
- C07D209/44—Iso-indoles; Hydrogenated iso-indoles
- C07D209/48—Iso-indoles; Hydrogenated iso-indoles with oxygen atoms in positions 1 and 3, e.g. phthalimide
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D403/00—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00
- C07D403/14—Heterocyclic compounds containing two or more hetero rings, having nitrogen atoms as the only ring hetero atoms, not provided for by group C07D401/00 containing three or more hetero rings
-
- 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
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
-
- 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
- C08G59/00—Polycondensates containing more than one epoxy group per molecule; Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups
- C08G59/18—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing
- C08G59/40—Macromolecules obtained by polymerising compounds containing more than one epoxy group per molecule using curing agents or catalysts which react with the epoxy groups ; e.g. general methods of curing characterised by the curing agents used
- C08G59/4007—Curing agents not provided for by the groups C08G59/42 - C08G59/66
- C08G59/4014—Nitrogen containing compounds
- C08G59/4042—Imines; Imides
Definitions
- the present invention relates to an ester compound that can be used in a resin composition having excellent heat resistance and dielectric properties after curing.
- the present invention also relates to a resin composition containing the ester compound, a cured product of the resin composition, and a build-up film using the resin composition.
- a curable resin such as an epoxy resin which has a low shrinkage and is excellent in adhesiveness, insulation, and chemical resistance, is used in many industrial products.
- a resin composition used as an interlayer insulating material for a printed wiring board is required to have dielectric properties such as a low dielectric constant and a low dielectric loss tangent.
- Patent Documents 1 and 2 disclose resin compositions containing a curable resin and a compound having a specific structure as a curing agent.
- such a resin composition has a problem that it is difficult to achieve both heat resistance after curing and dielectric properties.
- An object of the present invention is to provide an ester compound that can be used in a resin composition having excellent heat resistance and dielectric properties after curing. It is another object of the present invention to provide a resin composition containing the ester compound, a cured product of the resin composition, and a build-up film using the resin composition.
- the present invention is an ester compound represented by the following formula (1).
- R 1 and R 2 may be the same or different, and may be an optionally substituted aryl group, and R 3 is an optionally substituted arylene. It is a divalent group having at least one group, X is a divalent group having at least one optionally substituted arylene group, and n is an integer of 0 or more and 10 or less. The present invention will be described in detail below.
- the present inventors have found that a resin composition having excellent heat resistance and dielectric properties after curing can be obtained by using an ester compound having a specific structure as a curing agent, and have completed the present invention. ..
- the ester compound of the present invention is represented by the above formula (1).
- R 1 and R 2 may be the same or different, and are optionally substituted aryl groups. Since the ester compound of the present invention has an aryl group which may be substituted as R 1 and R 2 , the resin composition obtained when used as a curing agent is excellent in dielectric properties such as low dielectric loss tangent. Will be things.
- R 1 and R 2 in the above formula (1) are preferably groups represented by the following formula (2).
- R 1 and R 2 are groups represented by the following formula (2), the cured product of the resin composition obtained when the ester compound of the present invention is used as a curing agent has a low dielectric loss tangent or the like. It is more excellent in dielectric properties.
- R 4 is each independently a hydrogen atom or an aliphatic group, and * is a bonding position.
- R 3 is a divalent group having at least one optionally substituted arylene group.
- R 3 is a divalent group having at least one optionally substituted arylene group
- the cured product of the resin composition obtained when the ester compound of the present invention is used as a curing agent is heat resistant. Will be excellent.
- n in the above formula (1) is 1 or more, each R 3 may be the same or different.
- Examples of the arylene group contained in R 3 in the above formula (1) include a phenylene group, a naphthylene group, and an anthrylene group.
- examples of the substituent include an aliphatic group and the like.
- R 3 in the above formula (1) may be a group represented by the following formula (3-1), (3-2), (3-3) or (3-4). It is more preferably a group represented by the following formula (3-1) or (3-2).
- R 3 is a group represented by the following formula (3-1), (3-2), (3-3) or (3-4)
- the ester compound of the present invention can be used as a curing agent. When used, the compatibility with the curable resin is excellent, and the cured product of the obtained resin composition is excellent in heat resistance.
- R 5 is each independently a hydrogen atom or an aliphatic group
- R 6 is each independently a hydrogen atom or an aliphatic group
- R 7's each independently represent a hydrogen atom or an aliphatic group
- R 8's each independently represent a hydrogen atom or an aliphatic group
- R 9's each independently represent a hydrogen atom or an aliphatic group, and in formulas (3-1), (3-2), (3-3), and (3-4), * Is a binding position.
- R 3 in the formula (1) is a group represented by the formula (3-1)
- the group represented by the formula (3-1) is represented by the following formula (4-1) or
- the group represented by (4-2) is preferable.
- the ester compound represented by the above formula (1) is used as a curing agent, a compound in which R 3 is a group represented by the following formula (4-1) and a compound represented by the following formula (4-2) You may use the mixture with the compound which is a group.
- n is an integer of 0 or more and 10 or less.
- the ester compound of the present invention provides a cured product of a resin composition obtained when it is used as a curing agent even when multimerized, that is, when n in the formula (1) is 1 or more. It has excellent heat resistance and dielectric properties.
- the cured product of the obtained resin composition has excellent elongation. From the viewpoint of compatibility with the resin component and the like, the preferable upper limit of n in the above formula (1) is 10.
- X is a divalent group having at least one optionally substituted arylene group.
- arylene group contained in X in the above formula (1) include a phenylene group, a naphthylene group, and an anthrylene group.
- substituent include an aliphatic group and the like.
- n in the above formula (1) is 2 or more, each X may be the same or different.
- examples of X include groups represented by the following formula (5-1) or (5-2).
- R 10 is independently a hydrogen atom or an aliphatic group
- R 11 is independently a hydrogen atom or an aliphatic group.
- the preferred lower limit of the molecular weight of the ester compound of the present invention is 500, and the preferred upper limit thereof is 10,000.
- the ester compound of the present invention is excellent in compatibility with the resin component while maintaining excellent heat resistance after curing, and a cured product of the obtained resin composition. Is more excellent due to dielectric properties such as low dielectric loss tangent.
- the more preferable lower limit of the molecular weight of the ester compound of the present invention is 580, the more preferable upper limit thereof is 8000, and the still more preferable lower limit thereof is 600.
- the molecular weight of the ester compound is preferably 5500 or less.
- the molecular weight of the ester compound is 5000, a still more preferable upper limit is 4500, an even more preferable upper limit is 4000, a particularly preferable upper limit is 3500, and a most preferable upper limit is 3000.
- the molecular weight of the ester compound is preferably 1000 or more. When the molecular weight is 1,000 or more, the cured product of the curable resin composition obtained is more excellent in elongation.
- a more preferable lower limit of the molecular weight of the above ester compound is 1200 or more, and a still more preferable lower limit thereof is 1500 or more.
- the above-mentioned “molecular weight” is a molecular weight obtained from the structural formula for a compound having a specified molecular structure (for example, in the case where only n is 0 in the above formula (1)). .. Further, in the present specification, the “molecular weight” refers to a compound having a wide distribution of the degree of polymerization (for example, in the case of a mixture having a plurality of values of n in the above formula (1)) and a compound having an unspecified modification site.
- the “number average molecular weight” is a value obtained by gel permeation chromatography (GPC) using tetrahydrofuran as a solvent and polystyrene conversion.
- GPC gel permeation chromatography
- Examples of the column used when measuring the number average molecular weight in terms of polystyrene by GPC include JAIGEL-2H-A (manufactured by Japan Analytical Industry Co., Ltd.) and the like.
- examples of the method for producing a compound in which n in the above formula (1) is 0 include the following methods. That is, after reacting trimellitic anhydride with an aromatic diamine represented by the following formula (6), a hydroxyl group-containing aromatic compound represented by the following formula (7-1) and/or the following formula (7) A compound in which n in the formula (1) is 0 can be produced by a method of reacting a hydroxyl group-containing aromatic compound represented by -2).
- a compound in which n in the above formula (1) is 0 can also be produced by a method of reacting with an aromatic diamine represented by the following formula (6).
- ester compound of the present invention when the ester compound of the present invention is to be produced in a large amount, that is, as a method for producing a compound in which n in the above formula (1) is 1 or more, for example, the following method and the like can be mentioned. That is, in the method for producing a compound in which n in the above formula (1) is 0, a hydroxyl group-containing aromatic compound represented by the above formula (7-1) and/or a hydroxyl group-containing aromatic compound represented by the above formula (7-2) In addition to the hydroxyl group-containing aromatic compound described above, a compound in which n in the formula (1) is 1 or more can be produced by a method of reacting a hydroxyl group-containing aromatic compound represented by the following formula (8). ..
- R 3 is the same group as R 3 in formula (1).
- R 1 is the same group as R 1 in formula (1) above, and in formula (7-2), R 2 is the same as R 2 in formula (1) above. It is a base.
- X is the same group as X in formula (1).
- aromatic diamine represented by the above formula (6) examples include 2-methyl-4,6-diethyl-1,3-phenylenediamine and 2,4-diethyl-6-methyl-1,3-phenylenediamine. , 3,3′-diaminodiphenylmethane, 3,4′-diaminodiphenylmethane, 4,4′-diaminodiphenylmethane, 3,3′-diaminodiphenyl ether, 3,4′-diaminodiphenyl ether, 4,4′-diaminodiphenyl ether, 1 ,2-phenylenediamine, 1,3-phenylenediamine, 1,4-phenylenediamine, 3,3'-diaminodiphenyl sulfone, 4,4'-diaminodiphenyl sulfone, bis(4-(3-aminophenoxy)phenyl) Sulfone, bis(4-(4-(
- 2-methyl-4,6-diethyl-1,3-phenylenediamine, 2,4-diethyl-6-methyl-1,3-phenylenediamine from the viewpoints of solubility, heat resistance and availability.
- 1,3-bis(3-aminophenoxy)benzene, 4,4′-diaminodiphenylmethane and bis(4-(4-aminophenoxy)phenyl)sulfone are preferable
- 2-methyl-4,6-diethyl-1, More preferable are 3-phenylenediamine, 2,4-diethyl-6-methyl-1,3-phenylenediamine and 1,3-bis(3-aminophenoxy)benzene.
- hydroxyl group-containing aromatic compound represented by the formula (7-1) and the hydroxyl group-containing aromatic compound represented by the formula (7-2) include, for example, phenol, 1-naphthol, 2-naphthol, 1- Hydroxyanthracene, 2-hydroxyanthracene, 9-hydroxyanthracene, o-cresol, m-cresol, p-cresol, 2,3-dimethylphenol, 2,4-dimethylphenol, 2,5-dimethylphenol, 2,6- Dimethylphenol, 3,4-dimethylphenol, 3,5-dimethylphenol, 4-tert-butylphenol, 4- ⁇ -cumylphenol, 1-methyl-2-naphthol, 3-methyl-2-naphthol, 6-methyl -2-naphthol, 7-methyl-2-naphthol, 1-bromo-2-naphthol, 3-bromo-2-naphthol, 6-bromo-2-naphthol, 7-bromo-2
- Examples of the hydroxyl group-containing aromatic compound represented by the above formula (8) include 1,2-dihydroxybenzene, 1,3-dihydroxybenzene, 1,4-dihydroxybenzene, 1,2-dihydroxynaphthalene, and 1,3. -Dihydroxynaphthalene, 1,4-dihydroxynaphthalene, 1,5-dihydroxynaphthalene, 1,6-dihydroxynaphthalene, 1,7-dihydroxynaphthalene, 1,8-dihydroxynaphthalene, 2,3-dihydroxynaphthalene, 2,6- Dihydroxynaphthalene, 2,7-dihydroxynaphthalene, 2,6-dihydroxyanthracene, 9,10-dihydroxyanthracene, 4,4'-dihydroxybiphenyl, 3,3',5,5'-tetramethylbiphenyl-4,4' -Diol, 2,2-bis(4-hydroxyphenyl)propane, 1,1'-methylenedi
- a resin composition containing a curable resin and a curing agent, wherein the curing agent contains the ester compound of the present invention is also one aspect of the present invention.
- the resin composition of the present invention contains the ester compound of the present invention, the cured product has excellent heat resistance and dielectric properties.
- the resin composition of the present invention may contain other curing agents in addition to the ester compound of the present invention within a range that does not impair the object of the present invention in order to improve the processability in an uncured state.
- the other curing agent include phenol-based curing agents, thiol-based curing agents, amine-based curing agents, acid anhydride-based curing agents, cyanate-based curing agents, and active ester-based curing agents other than the ester compound of the present invention. Agents and the like. Of these, active ester-based curing agents and cyanate-based curing agents other than the ester compound of the present invention are preferable.
- the content of the ester compound of the present invention is preferably 50 parts by weight and 300 parts by weight with respect to 100 parts by weight of the curable resin. ..
- the content of the ester compound of the present invention within this range makes the obtained resin composition more excellent in heat resistance and dielectric properties.
- the more preferable lower limit of the content of the ester compound of the present invention is 70 parts by weight, and the more preferable upper limit thereof is 200 parts by weight.
- the content of the ester compound of the present invention when the ester compound of the present invention and another curing agent are used together as the above curing agent has a preferable lower limit of 5 parts by weight, preferably 100 parts by weight of the curable resin.
- the upper limit is 200 parts by weight.
- a more preferable lower limit of the content of the ester compound of the present invention is 10 parts by weight, and a more preferable upper limit thereof is 150 parts by weight, when the ester compound of the present invention is used in combination with another curing agent as the curing agent.
- the ester compound of the present invention and another curing agent are used in combination as the curing agent, the total content of the ester compound of the present invention and the other curing agent has a preferable lower limit with respect to 100 parts by weight of the curable resin. 20 parts by weight, and the preferred upper limit is 200 parts by weight.
- the resin composition of the present invention contains a curable resin.
- the curable resin include epoxy resin, cyanate resin, phenol resin, imide resin, maleimide resin, benzoxazine resin, silicone resin, acrylic resin, and fluororesin.
- the curable resin preferably contains at least one selected from the group consisting of epoxy resin, cyanate resin, phenol resin, imide resin, maleimide resin, and benzoxazine resin, and contains epoxy resin. Is more preferable.
- the above curable resins may be used alone or in combination of two or more.
- the epoxy resin examples include bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol E type epoxy resin, bisphenol S type epoxy resin, 2,2′-diallyl bisphenol A type epoxy resin, hydrogenated bisphenol type epoxy resin. , Propylene oxide-added bisphenol A type epoxy resin, resorcinol type epoxy resin, biphenyl type epoxy resin, sulfide type epoxy resin, diphenyl ether type epoxy resin, dicyclopentadiene type epoxy resin, naphthalene type epoxy resin, fluorene type epoxy resin, naphthylene ether Type epoxy resin, phenol novolac type epoxy resin, ortho-cresol novolac type epoxy resin, dicyclopentadiene novolac type epoxy resin, biphenyl novolac type epoxy resin, naphthalene phenol novolac type epoxy resin, glycidyl amine type epoxy resin, alkyl polyol type epoxy resin, Examples thereof include rubber-modified epoxy resins and glycidyl ester compounds.
- the resin composition of the present invention preferably contains a curing accelerator.
- a curing accelerator By containing the above curing accelerator, the curing time can be shortened and the productivity can be improved.
- the curing accelerator examples include imidazole curing accelerators, tertiary amine curing accelerators, phosphine curing accelerators, photobase generators, sulfonium salt curing accelerators, and the like. Among them, imidazole-based curing accelerators and phosphine-based curing accelerators are preferable from the viewpoint of storage stability and curability.
- the above curing accelerators may be used alone or in combination of two or more.
- the content of the curing accelerator is preferably 0.01 parts by weight and 5 parts by weight with respect to 100 parts by weight of the curable resin.
- the content of the curing accelerator is within this range, the resin composition obtained is more excellent in the effect of shortening the curing time without deteriorating the adhesiveness.
- the more preferable lower limit of the content of the curing accelerator is 0.05 parts by weight, and the more preferable upper limit thereof is 3 parts by weight.
- the resin composition of the present invention preferably contains an inorganic filler.
- an inorganic filler By containing the above-mentioned inorganic filler, the resin composition of the present invention is more excellent in moisture absorption reflow resistance, plating resistance, and processability while maintaining excellent adhesiveness and long-term heat resistance.
- the inorganic filler is preferably at least one of silica and barium sulfate.
- the resin composition of the present invention becomes more excellent in hygroscopic reflow resistance, plating resistance, and processability.
- Examples of the inorganic filler other than the silica and the barium sulfate include alumina, aluminum nitride, boron nitride, silicon nitride, glass powder, glass frit, glass fiber, carbon fiber, and inorganic ion exchanger.
- the inorganic fillers may be used alone or in combination of two or more.
- the preferable lower limit of the average particle diameter of the inorganic filler is 50 nm, and the preferable upper limit thereof is 10 ⁇ m. When the average particle size of the inorganic filler is within this range, the resin composition obtained will be more excellent in coatability and processability.
- the more preferable lower limit of the average particle diameter of the inorganic filler is 100 nm, and the more preferable upper limit thereof is 5 ⁇ m.
- the content of the inorganic filler is preferably 10 parts by weight and 1000 parts by weight with respect to 100 parts by weight of the total of the resin composition excluding the solvent.
- the content of the above-mentioned inorganic filler is in this range, the obtained resin composition is more excellent in moisture absorption reflow resistance, plating resistance, and processability.
- the more preferable lower limit of the content of the inorganic filler is 20 parts by weight.
- the resin composition of the present invention may contain a flow regulator for the purpose of improving the wettability and shape retention on the adherend in a short time.
- a flow regulator for the purpose of improving the wettability and shape retention on the adherend in a short time.
- the flow modifier include fumed silica such as Aerosil and layered silicate.
- the above flow regulator may be used alone or in combination of two or more kinds. Further, as the flow regulator, those having an average particle diameter of less than 100 nm are preferably used.
- the content of the flow regulator is preferably 0.1 part by weight and 100 parts by weight with respect to 100 parts by weight of the curable resin.
- the content of the flow control agent is within this range, the effect of improving the wettability on the adherend in a short period of time and the shape-retaining property is improved.
- the more preferable lower limit of the content of the flow regulator is 0.5 parts by weight, and the more preferable upper limit thereof is 50 parts by weight.
- the resin composition of the present invention may contain an organic filler for the purpose of stress relaxation, imparting toughness and the like.
- organic filler include silicone rubber particles, acrylic rubber particles, urethane rubber particles, polyamide particles, polyamideimide particles, polyimide particles, benzoguanamine particles, and core-shell particles thereof. Of these, polyamide particles, polyamideimide particles, and polyimide particles are preferable.
- the organic fillers may be used alone or in combination of two or more.
- the content of the organic filler is preferably 300 parts by weight with respect to 100 parts by weight of the total resin composition excluding the solvent.
- the content of the organic filler is within this range, the cured product of the obtained resin composition becomes more excellent in toughness and the like while maintaining excellent adhesiveness and the like.
- the more preferable upper limit of the content of the organic filler is 200 parts by weight.
- the resin composition of the present invention may contain a flame retardant.
- the flame retardant include metal hydrates such as boehmite type aluminum hydroxide, aluminum hydroxide and magnesium hydroxide, halogen compounds, phosphorus compounds and nitrogen compounds. Among them, boehmite type aluminum hydroxide is preferable.
- the above flame retardants may be used alone or in combination of two or more.
- the content of the flame retardant is preferably 2 parts by weight and 300 parts by weight with respect to 100 parts by weight of the curable resin. When the content of the flame retardant is within this range, the resin composition obtained has excellent flame retardancy while maintaining excellent adhesiveness and the like.
- the more preferable lower limit of the content of the flame retardant is 5 parts by weight, and the more preferable upper limit thereof is 250 parts by weight.
- the resin composition of the present invention may contain a thermoplastic resin as long as the object of the present invention is not impaired.
- the resin composition of the present invention is more excellent in flow properties, and it becomes easier to satisfy both the filling property and the leaching prevention property during thermocompression bonding, and the flex resistance after curing. It will be excellent.
- thermoplastic resin examples include polyimide resin, phenoxy resin, polyamide resin, polyamideimide resin, polyvinyl acetal resin, and the like. Of these, a polyimide resin and a phenoxy resin are preferable from the viewpoint of heat resistance and handleability.
- the above thermoplastic resins may be used alone or in combination of two or more.
- the preferred lower limit of the number average molecular weight of the thermoplastic resin is 2000, and the preferred upper limit is 100,000. When the number average molecular weight of the thermoplastic resin is within this range, the resin composition obtained is more excellent in flow properties and flex resistance after curing.
- the more preferable lower limit of the number average molecular weight of the thermoplastic resin is 5,000, and the more preferable upper limit thereof is 50,000.
- the content of the thermoplastic resin is preferably 0.5 parts by weight and 100 parts by weight with respect to 100 parts by weight of the curable resin.
- the content of the thermoplastic resin is 0.5 parts by weight or more, the resin composition obtained is more excellent in the flow characteristics and the flex resistance after curing.
- the content of the thermoplastic resin is 120 parts by weight or less, the resin composition obtained will be more excellent in adhesiveness and heat resistance.
- the more preferable lower limit of the content of the thermoplastic resin is 1 part by weight, and the more preferable upper limit thereof is 80 parts by weight.
- the resin composition of the present invention may contain a solvent from the viewpoint of coatability and the like.
- a solvent a non-polar solvent having a boiling point of 160° C. or lower or an aprotic polar solvent having a boiling point of 160° C. or lower is preferable from the viewpoint of coating properties and storage stability.
- the non-polar solvent having a boiling point of 160° C. or lower or the aprotic polar solvent having a boiling point of 160° C. or lower include a ketone solvent, an ester solvent, a hydrocarbon solvent, a halogen solvent, an ether solvent, and a nitrogen-containing solvent. Examples include system solvents.
- Examples of the ketone solvent include acetone, methyl ethyl ketone, methyl isobutyl ketone, and cyclohexanone.
- Examples of the ester solvent include methyl acetate, ethyl acetate, isobutyl acetate and the like.
- Examples of the hydrocarbon solvent include benzene, toluene, normal hexane, isohexane, cyclohexane, methylcyclohexane, and normal heptane.
- Examples of the halogen-based solvent include dichloromethane, chloroform, trichloroethylene and the like.
- ether solvent examples include diethyl ether, tetrahydrofuran, 1,4-dioxane, 1,3-dioxolane and the like.
- nitrogen-containing solvent examples include acetonitrile and the like. Among them, from the viewpoints of handleability, solubility of the above-mentioned curing agent, etc., a ketone solvent having a boiling point of 60°C or higher, an ester solvent having a boiling point of 60°C or higher, and an ether solvent having a boiling point of 60°C or higher are used. At least one selected from the group is preferred.
- solvents examples include methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, ethyl acetate, isobutyl acetate, 1,4-dioxane, 1,3-dioxolane, tetrahydrofuran and the like.
- boiling point means a value measured under the condition of 101 kPa or a value converted into 101 kPa in a boiling point conversion chart or the like.
- the preferred lower limit of the content of the solvent in 100 parts by weight of the resin composition of the present invention is 10 parts by weight, and the preferred upper limit is 80 parts by weight.
- the content of the solvent is within this range, the resin composition of the present invention is more excellent in coatability and the like.
- the more preferable lower limit of the content of the solvent is 20 parts by weight, and the more preferable upper limit thereof is 70 parts by weight.
- the resin composition of the present invention may contain a reactive diluent as long as the object of the present invention is not impaired.
- the reactive diluent is preferably a reactive diluent having two or more reactive functional groups in one molecule.
- the resin composition of the present invention may further contain additives such as a coupling agent, a dispersant, a storage stabilizer, an anti-bleeding agent, a flux agent and a leveling agent.
- additives such as a coupling agent, a dispersant, a storage stabilizer, an anti-bleeding agent, a flux agent and a leveling agent.
- Examples of the method for producing the resin composition of the present invention include a method of mixing a curable resin, the ester compound of the present invention, and a solvent and the like added as necessary with a mixer. ..
- Examples of the mixer include a homodisper, a universal mixer, a Banbury mixer, and a kneader.
- a resin composition film comprising the resin composition of the present invention can be obtained by applying the resin composition of the present invention onto a substrate film and drying it.
- the resin composition film is cured to obtain a cured product.
- a cured product of the resin composition of the present invention is also one aspect of the present invention.
- the glass transition temperature of the cured product has a preferred lower limit of 100°C and a preferred upper limit of 250°C.
- the cured product of the resin composition of the present invention is excellent in mechanical strength and long-term heat resistance.
- the more preferable lower limit of the glass transition temperature of the cured product is 130°C, and the more preferable upper limit thereof is 220°C.
- the “glass transition temperature of the cured product” is from ⁇ 0° C. to 300° C. at a temperature rising rate of 10° C./min, a frequency of 10 Hz and a chuck distance of 24 mm using a dynamic viscoelasticity measuring device.
- the cured product for measuring the glass transition temperature can be obtained by heating the resin composition film having a thickness of about 400 ⁇ m at 190° C. for 30 minutes.
- the resin composition of the present invention has a preferable lower limit of 5 ppm/° C. and a preferable upper limit of 100 ppm of the linear expansion coefficient in the temperature range of 40° C. to 120° C. of the cured product. /°C.
- the cured product of the resin composition of the present invention is more excellent in heat resistance.
- the more preferable lower limit of the linear expansion coefficient is 10 ppm/°C, and the more preferable upper limit thereof is 80 ppm/°C.
- the “linear expansion coefficient” refers to a value measured by the TMA method under the conditions of a temperature rising rate of 10° C./min and a force of 50N.
- the cured product used for measuring the linear expansion coefficient can be obtained, for example, by heating the resin composition film having a thickness of about 40 ⁇ m at 190° C. for 30 minutes.
- the resin composition of the present invention has a preferable upper limit of the dielectric loss tangent at 23° C. of the cured product of 15.
- the resin composition of the present invention can be suitably used for an interlayer insulating material such as a multilayer printed wiring board.
- the more preferable upper limit of the dielectric loss tangent at 23° C. of the cured product is 10.
- the “dielectric loss tangent” is a value measured under the condition of 5 GHz using a dielectric constant measuring device and a network analyzer.
- the cured product whose “dielectric loss tangent” is measured can be obtained by heating the above resin composition film having a thickness of about 40 ⁇ m to about 200 ⁇ m at 190° C. for 90 minutes.
- the resin composition of the present invention can be used for a wide range of applications, but can be suitably used for electronic material applications where particularly high heat resistance is required.
- it can be used as a die attach agent for use in electric control units (ECUs) for aviation and vehicles, and for power device applications using SiC and GaN.
- adhesives for power overlay packages adhesives for printed wiring boards, adhesives for coverlays of flexible printed circuit boards, copper clad laminates, adhesives for semiconductor bonding, interlayer insulating materials, prepregs, LED encapsulation. It can also be used as an adhesive and an adhesive for structural materials.
- the resin composition of the present invention has a low dielectric constant and low dielectric loss tangent as a cured product and is excellent in dielectric properties, and therefore can be suitably used for a build-up film.
- a build-up film using the resin composition of the present invention is also one aspect of the present invention.
- the ester compound which can be used for the resin composition which is excellent in heat resistance and dielectric property after hardening can be provided. Further, according to the present invention, it is possible to provide a resin composition containing the ester compound, a cured product of the resin composition, and a buildup film using the resin composition.
- ester compound A was represented by the above formula (1) (R 1 and R 2 are represented by the above formula (2).
- R 4 are all hydrogen atoms
- R 3 is a group represented by the above formula (3-2)
- R 6 are all hydrogen atoms
- n is 0).
- ester compound F was represented by the above formula (1) (R 1 and R 2 are the groups represented by the above formula (2) (R 4 Are all hydrogen atoms), R 3 is a group represented by the above formulas (4-1) and (4-2), X is a 1,3-phenylene group, and n is 0 or more and 10 or less).
- the number average molecular weight of the ester compound F determined from the results of GPC was 1784.
- the solution obtained by removing toluene from the obtained solution by using an evaporator was appropriately put into 800 parts by weight of pure water, and the precipitate was separated by filtration. Further, 70.3 parts by weight of the obtained precipitate and 20.2 parts by weight of triethylamine were dissolved in 200 parts by weight of N-methyl-2-pyrrolidone. 28.1 parts by weight of benzoyl chloride was added to the obtained solution and reacted at 25° C. for 4 hours with stirring. After completion of the reaction, the obtained solution was put in 800 parts by weight of pure water, the precipitate was filtered off, and vacuum dried to obtain an ester compound I. Incidentally, 1 H-NMR, GPC, and FT-IR analysis confirmed that the ester compound I was not represented by the above formula (1).
- Example 1 Methyl ethyl ketone was added as a solvent to each material having the compounding ratio shown in Table 1, and the mixture was stirred at 1200 rpm for 4 hours using a stirrer to obtain a resin composition.
- the composition of Table 1 describes the solid content excluding the solvent.
- the obtained resin composition was applied onto the release-treated surface of a PET film having a thickness of 25 ⁇ m using an applicator.
- XG284 manufactured by Toray Industries, Inc.
- Each uncured laminated film obtained in each of the examples and comparative examples was heated at 190° C. for 90 minutes, and then the base PET film was peeled off to obtain a cured product.
- the obtained cured product was cut into a size having a width of 2 mm and a length of 100 mm.
- the dielectric loss tangent of the cut cured product was measured by a cavity resonance perturbation method permittivity measuring device and a network analyzer under the conditions of a cavity resonance method at 23° C. and a frequency of 5 GHz.
- CP521 manufactured by Kanto Electronics Application Development Co., Ltd.
- N5224A PNA manufactured by Keysight Technology Inc.
- Each uncured laminated film obtained in each of the examples and comparative examples was heated at 200° C. for 3 hours, and then the base PET film was peeled off to obtain a cured product.
- the obtained cured product was cut into a size having a width of 10 mm and a length of 100 mm.
- the maximum elongation at break of the cut cured product was measured using a tensile tester under conditions of a chuck distance of 60 mm, a tensile speed of 5 mm/min, and an initial tension of 0.35 N.
- UCT-500 manufactured by ORITEC
- the ester compound which can be used for the resin composition which is excellent in heat resistance and dielectric property after hardening can be provided. Further, according to the present invention, it is possible to provide a resin composition containing the ester compound, a cured product of the resin composition, and a buildup film using the resin composition.
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Abstract
Description
以下に本発明を詳述する。
上記式(1)中、R1及びR2は、それぞれ同一であってもよいし、異なっていてもよく、置換されていてもよいアリール基である。上記R1及び上記R2として置換されていてもよいアリール基を有することにより、本発明のエステル化合物は、硬化剤として用いた場合に得られる樹脂組成物が低誘電正接等の誘電特性に優れるものとなる。
上記アリール基が置換されている場合の置換基としては、例えば、脂肪族基等が挙げられる。
なかでも、上記式(1)中のR1及びR2は、下記式(2)で表される基であることが好ましい。上記R1及び上記R2が下記式(2)で表される基であることにより、本発明のエステル化合物を硬化剤として用いた場合に得られる樹脂組成物の硬化物が低誘電正接等の誘電特性により優れるものとなる。
上記アリーレン基が置換されている場合の置換基としては、例えば、脂肪族基等が挙げられる。
なかでも、上記式(1)中のR3は、下記式(3-1)、(3-2)、(3-3)、又は、(3-4)で表される基であることが好ましく、下記式(3-1)又は(3-2)で表される基であることがより好ましい。上記R3が下記式(3-1)、(3-2)、(3-3)、又は、(3-4)で表される基であることにより、本発明のエステル化合物を硬化剤として用いた場合に硬化性樹脂との相溶性により優れるものとなり、かつ、得られる樹脂組成物の硬化物が耐熱性により優れるものとなる。
また、上記式(1)で表されるエステル化合物を硬化剤として用いる場合、上記R3が下記式(4-1)で表される基である化合物と、下記式(4-2)で表される基である化合物との混合物を用いてもよい。
上記式(1)中、nが0である場合、本発明のエステル化合物を硬化剤として用いた場合に得られる樹脂組成物の硬化物が耐熱性により優れるものとなる。
また、本発明のエステル化合物は、多量体化した場合、即ち、上記式(1)中のnが1以上である場合においても、硬化剤として用いた場合に得られる樹脂組成物の硬化物が耐熱性及び誘電特性に優れるものとなる。また、上記式(1)中のnが1以上である場合は、得られる樹脂組成物の硬化物が伸びにも優れるものとなる。
樹脂成分との相溶性等の観点から、上記式(1)中のnの好ましい上限は10である。
上記式(1)中のXに含まれるアリーレン基としては、例えば、フェニレン基、ナフチレン基、アントリレン基等が挙げられる。
上記アリーレン基が置換されている場合の置換基としては、例えば、脂肪族基等が挙げられる。なお、上記式(1)中のnが2以上である場合、各Xは、同一であってもよいし、異なっていてもよい。
なお、本明細書において上記「分子量」は、分子構造が特定される化合物(例えば、上記式(1)において、nが0の化合物のみである場合)については、構造式から求められる分子量である。また、本明細書において上記「分子量」は、重合度の分布が広い化合物(例えば、上記式(1)において、nが複数の値を有する混合物の場合)及び変性部位が不特定な化合物については、数平均分子量を用いて表す場合がある。本明細書において上記「数平均分子量」は、ゲルパーミエーションクロマトグラフィー(GPC)で溶媒としてテトラヒドロフランを用いて測定を行い、ポリスチレン換算により求められる値である。GPCによってポリスチレン換算による数平均分子量を測定する際に用いるカラムとしては、例えば、JAIGEL-2H-A(日本分析工業社製)等が挙げられる。
即ち、無水トリメリット酸と、下記式(6)で表される芳香族ジアミンとを反応させた後、下記式(7-1)で表される水酸基含有芳香族化合物及び/又は下記式(7-2)で表される水酸基含有芳香族化合物を反応させる方法により、上記式(1)中のnが0である化合物を製造することができる。また、無水トリメリット酸ハライドと、下記式(7-1)で表される水酸基含有芳香族化合物及び/又は下記式(7-2)で表される水酸基含有芳香族化合物を反応させた後、下記式(6)で表される芳香族ジアミンとを反応させる方法によっても、上記式(1)中のnが0である化合物を製造することができる。
即ち、上記式(1)中のnが0である化合物を製造する方法において、上記式(7-1)で表される水酸基含有芳香族化合物及び/又は上記式(7-2)で表される水酸基含有芳香族化合物に加えて、下記式(8)で表される水酸基含有芳香族化合物を反応させる方法により、上記式(1)中のnが1以上である化合物を製造することができる。
本発明のエステル化合物を含有することにより、本発明の樹脂組成物は、硬化物が耐熱性及び誘電特性に優れるものとなる。
上記他の硬化剤としては、例えば、フェノール系硬化剤、チオール系硬化剤、アミン系硬化剤、酸無水物系硬化剤、シアネート系硬化剤、本発明のエステル化合物以外の他の活性エステル系硬化剤等が挙げられる。なかでも、本発明のエステル化合物以外の他の活性エステル系硬化剤、シアネート系硬化剤が好ましい。
また、上記硬化剤として、本発明のエステル化合物とその他の硬化剤を併用する場合の本発明のエステル化合物の含有量は、硬化性樹脂100重量部に対して、好ましい下限が5重量部、好ましい上限が200重量部である。上記硬化剤として本発明のエステル化合物とその他の硬化剤を併用する場合、本発明のエステル化合物の含有量がこの範囲であることにより、得られる樹脂組成物が、耐熱性及び誘電特性により優れるものとなる。上記硬化剤として本発明のエステル化合物とその他の硬化剤を併用する場合の本発明のエステル化合物の含有量のより好ましい下限は10重量部、より好ましい上限は150重量部である。上記硬化剤として本発明のエステル化合物とその他の硬化剤を併用する場合の本発明のエステル化合物とその他の硬化剤との合計の含有量は、硬化性樹脂100重量部に対して、好ましい下限が20重量部、好ましい上限が200重量部である。
上記硬化性樹脂としては、例えば、エポキシ樹脂、シアネート樹脂、フェノール樹脂、イミド樹脂、マレイミド樹脂、ベンゾオキサジン樹脂、シリコーン樹脂、アクリル樹脂、フッ素樹脂等が挙げられる。なかでも、上記硬化性樹脂は、エポキシ樹脂、シアネート樹脂、フェノール樹脂、イミド樹脂、マレイミド樹脂、及び、ベンゾオキサジン樹脂からなる群より選択される少なくとも1種を含むことが好ましく、エポキシ樹脂を含むことがより好ましい。上記硬化性樹脂は、単独で用いられてもよいし、2種以上が組み合わせて用いられてもよい。
上記硬化促進剤は、単独で用いられてもよいし、2種類以上が組み合わせて用いられてもよい。
上記無機充填剤を含有することにより、本発明の樹脂組成物は、優れた接着性及び長期耐熱性を維持したまま、吸湿リフロー耐性、めっき耐性、及び、加工性により優れるものとなる。
上記流動調整剤としては、例えば、アエロジル等のヒュームドシリカや層状ケイ酸塩等が挙げられる。
上記流動調整剤は、単独で用いられてもよいし、2種類以上が組み合わせて用いられてもよい。
また、上記流動調整剤としては、平均粒子径が100nm未満のものが好適に用いられる。
上記有機充填剤としては、例えば、シリコーンゴム粒子、アクリルゴム粒子、ウレタンゴム粒子、ポリアミド粒子、ポリアミドイミド粒子、ポリイミド粒子、ベンゾグアナミン粒子、及び、これらのコアシェル粒子等が挙げられる。なかでも、ポリアミド粒子、ポリアミドイミド粒子、ポリイミド粒子が好ましい。
上記有機充填剤は、単独で用いられてもよいし、2種類以上が組み合わせて用いられてもよい。
上記難燃剤としては、例えば、ベーマイト型水酸化アルミニウム、水酸化アルミニウム、水酸化マグネシウム等の金属水和物、ハロゲン系化合物、りん系化合物、窒素化合物等が挙げられる。なかでも、ベーマイト型水酸化アルミニウムが好ましい。
上記難燃剤は、単独で用いられてもよいし、2種類以上が組み合わせて用いられてもよい。
上記熱可塑性樹脂は、単独で用いられてもよいし、2種以上が組み合わせて用いられてもよい。
上記溶媒としては、塗工性や貯蔵安定性等の観点から、沸点が160℃以下の非極性溶媒又は沸点が160℃以下の非プロトン性極性溶媒が好ましい。
上記沸点が160℃以下の非極性溶媒又は沸点が160℃以下の非プロトン性極性溶媒としては、例えば、ケトン系溶媒、エステル系溶媒、炭化水素系溶媒、ハロゲン系溶媒、エーテル系溶媒、含窒素系溶媒等が挙げられる。
上記ケトン系溶媒としては、例えば、アセトン、メチルエチルケトン、メチルイソブチルケトン、シクロヘキサノン等が挙げられる。
上記エステル系溶媒としては、例えば、酢酸メチル、酢酸エチル、酢酸イソブチル等が挙げられる。
上記炭化水素系溶媒としては、例えば、ベンゼン、トルエン、ノルマルヘキサン、イソヘキサン、シクロヘキサン、メチルシクロヘキサン、ノルマルヘプタン等が挙げられる。
上記ハロゲン系溶媒としては、例えば、ジクロロメタン、クロロホルム、トリクロロエチレン等が挙げられる。
上記エーテル系溶媒としては、例えば、ジエチルエーテル、テトラヒドロフラン、1,4-ジオキサン、1,3-ジオキソラン等が挙げられる。
上記含窒素系溶媒としては、例えば、アセトニトリル等が挙げられる。
なかでも、取り扱い性や上記硬化剤の溶解性等の観点から、沸点が60℃以上のケトン系溶媒、沸点が60℃以上のエステル系溶媒、及び、沸点が60℃以上のエーテル系溶媒からなる群より選択される少なくとも1種が好ましい。このような溶媒としては、例えば、メチルエチルケトン、メチルイソブチルケトン、シクロヘキサノン、酢酸エチル、酢酸イソブチル、1,4-ジオキサン、1,3-ジオキソラン、テトラヒドロフラン等が挙げられる。
なお、上記「沸点」は、101kPaの条件で測定される値、又は、沸点換算図表等で101kPaに換算された値を意味する。
上記反応性希釈剤としては、接着信頼性の観点から、1分子中に2つ以上の反応性官能基を有する反応性希釈剤が好ましい。
上記混合機としては、例えば、ホモディスパー、万能ミキサー、バンバリーミキサー、ニーダー等が挙げられる。
なお、本明細書において上記「硬化物のガラス転移温度」は、動的粘弾性測定装置を用い、昇温速度10℃/分、周波数10Hz、チャック間距離24mmで-0℃から300℃までの昇温条件で測定した際に得られるtanδカーブのピーク温度として求めることができる。上記動的粘弾性測定装置としては、例えば、レオバイブロン動的粘弾性自動測定器DDV-GPシリーズ(エー・アンド・デイ社製)等が挙げられる。上記ガラス転移温度を測定する硬化物は、厚さを約400μmとした上記樹脂組成物フィルムを190℃で30分加熱することにより得ることができる。
なお、本明細書において上記「線膨張係数」は、TMA法により昇温速度10℃/分、力50Nの条件で測定される値を示す。また、上記線膨張係数の測定に用いる硬化物は、例えば、厚さを約40μmとした上記樹脂組成物フィルムを190℃で30分加熱することにより得ることができる。
なお、上記「誘電正接」は、誘電率測定装置及びネットワークアナライザーを用いて5GHzの条件で測定される値である。なお、上記「誘電正接」を測定する硬化物は、厚さを約40μmから約200μmとした上記樹脂組成物フィルムを190℃で90分間加熱することにより得ることができる。
なかでも、本発明の樹脂組成物は、硬化物が低誘電率、低誘電正接であり、誘電特性に優れるため、ビルドアップフィルムに好適に用いることができる。本発明の樹脂組成物を用いてなるビルドアップフィルムもまた、本発明の1つである。
攪拌器、還流冷却器、ディーンスタークの水分離器を備えた容器を用いて、無水トリメリット酸クロリド21.1重量部をN-メチル-2-ピロリドン200重量部に溶解させた。得られた溶液に2-ナフトール14.4重量部を添加し、更にトリエチルアミン10.1重量部を添加し、25℃で4時間撹拌して反応させた。
得られた反応液に、1,3-ビス(3-アミノフェノキシ)ベンゼン14.6重量部を添加し、25℃で4時間撹拌して反応させた。得られた溶液に、トルエン200重量部を添加した後、150℃で水が発生しなくなるまで、4時間還流を行った。反応終了後、得られた溶液から、エバポレーターを用いてトルエンを除去した溶液を純水800重量部に適下し、析出物を濾別した後、真空乾燥を行いエステル化合物Aを得た。
なお、1H-NMR、GPC、及び、FT-IR分析により、エステル化合物Aは、上記式(1)で表されることを確認した(R1、R2は上記式(2)で表される基(R4は全て水素原子)、R3は上記式(3-2)で表される基(R6は全て水素原子)、nは0)。
2-ナフトール14.4重量部をフェノール9.4重量部に変更したこと以外は合成例1と同様にして、エステル化合物Bを得た。
なお、1H-NMR、GPC、及び、FT-IR分析により、エステル化合物Bは、上記式(1)で表されることを確認した(R1、R2はフェニル基、R3は上記式(3-2)で表される基(R6は全て水素原子)、nは0)。
1,3-ビス(3-アミノフェノキシ)ベンゼン14.6重量部を2-メチル-4,6-ジエチル-1,3-フェニレンジアミンと2,4-ジエチル-6-メチル-1,3-フェニレンジアミンとの混合物(三井化学ファイン社製、「エタキュア100」)8.9重量部に変更したこと以外は合成例1と同様にして、エステル化合物Cを得た。
なお、1H-NMR、GPC、及び、FT-IR分析により、エステル化合物Cは、上記式(1)で表されることを確認した(R1、R2は上記式(2)で表される基(R4は全て水素原子)、R3は上記式(4-1)、(4-2)で表される基、nは0)。
1,3-ビス(3-アミノフェノキシ)ベンゼン14.6重量部を4,4’-ジアミノジフェニルメタン9.9重量部に変更したこと以外は合成例1と同様にして、エステル化合物Dを得た。
なお、1H-NMR、GPC、及び、FT-IR分析により、エステル化合物Dは、上記式(1)で表されることを確認した(R1、R2は上記式(2)で表される基(R4は全て水素原子)、R3は上記式(3-3)で表される基(R7は全て水素原子、R8は全て水素原子)、nは0)。
1,3-ビス(3-アミノフェノキシ)ベンゼン14.6重量部をビス(4-(4-アミノフェノキシ)フェニル)スルフォン21.6重量部に変更したこと以外は合成例1と同様にして、エステル化合物Eを得た。
なお、1H-NMR、GPC、及び、FT-IR分析により、エステル化合物Eは、上記式(1)で表されることを確認した(R1、R2は上記式(2)で表される基(R4は全て水素原子)、R3は上記式(3-4)で表される基(R9は全て水素原子)、nは0)。
攪拌器、還流冷却器、ディーンスタークの水分離器を備えた容器を用いて、無水トリメリット酸クロリド21.1重量部、2-ナフトール7.2重量部、及び、1,3-ジヒドロキシベンゼン2.8重量部をN-メチル-2-ピロリドン130重量部に溶解させた。得られた溶液にトリエチルアミン11.1重量部を添加し、25℃で2時間撹拌して反応させた。
得られた反応液に、2-メチル-4,6-ジエチル-1,3-フェニレンジアミンと2,4-ジエチル-6-メチル-1,3-フェニレンジアミンとの混合物(三井化学ファイン社製、「エタキュア100」)8.9重量部を添加し、25℃で2時間撹拌して反応させた。得られた溶液に、トルエン50重量部を添加した後、170℃で水が発生しなくなるまで、一晩還流を行った。反応終了後、メタノール800重量部に適下し、析出物を濾別した後、真空乾燥を行いエステル化合物Fを得た。
なお、1H-NMR、及び、GPCにより、エステル化合物Fは、上記式(1)で表されることを確認した(R1、R2は上記式(2)で表される基(R4は全て水素原子)、R3は上記式(4-1)、(4-2)で表される基、Xは1,3-フェニレン基、nは、0以上10以下)。また、GPCの結果より求めたエステル化合物Fの数平均分子量は1784であった。
1,3-ジヒドロキシベンゼン2.8重量部を4,4’-ジヒドロキシビフェニル4.7重量部に変更したこと以外は合成例6と同様にして、エステル化合物Gを得た。
なお、1H-NMR、及び、GPCにより、エステル化合物Gは、上記式(1)で表されることを確認した(R1、R2は上記式(2)で表される基(R4は全て水素原子)、R3は上記式(4-1)、(4-2)で表される基、Xは上記式(5-1)で表される基(R10は全て水素原子)、nは、0以上10以下)。また、GPCの結果より求めたエステル化合物Gの数平均分子量は2175であった。
1,3-ジヒドロキシベンゼン2.8重量部を1,1’-メチレンジ-2-ナフトール7.5重量部に変更したこと以外は合成例6と同様にして、エステル化合物Hを得た。
なお、1H-NMR、及び、GPCにより、エステル化合物Hは、上記式(1)で表されることを確認した(R1、R2は上記式(2)で表される基(R4は全て水素原子)、R3は上記式(4-1)、(4-2)で表される基、Xは上記式(5-2)で表される基(R11は全て水素原子、nは、0以上10以下))。また、GPCの結果より求めたエステル化合物Hの数平均分子量は1687であった。
攪拌器、還流冷却器、ディーンスタークの水分離器を備えた容器を用いて、3-アミノフェノール21.8重量部をN-メチル-2-ピロリドン100重量部に溶解させた。得られた溶液に2,2-ビス(4-(2,3-ジカルボキシルフェノキシ)フェニル)プロパン52.0重量部を添加し、25℃で4時間撹拌して反応させた。得られた溶液に、トルエン100重量部を添加した後、150℃で水が発生しなくなるまで、4時間還流を行った。反応終了後、得られた溶液から、エバポレーターを用いてトルエンを除去した溶液を純水800重量部に適下し、析出物を濾別した。
更に得られた析出物70.3重量部とトリエチルアミン20.2重量部をN-メチル-2-ピロリドン200重量部に溶解させた。得られた溶液に塩化ベンゾイル28.1重量部を添加し、25℃で4時間撹拌して反応させた。反応終了後、得られた溶液を純水800重量部に適下し、析出物を濾別した後、真空乾燥を行いエステル化合物Iを得た。
なお、1H-NMR、GPC、及び、FT-IR分析により、エステル化合物Iは、上記式(1)で表されないことを確認した。
表1に記載された配合比の各材料に溶媒としてメチルエチルケトンを加え、撹拌機を用いて1200rpmで4時間撹拌し、樹脂組成物を得た。なお、表1の組成には、溶媒を除く固形分について記載した。
アプリケーターを用いて、得られた樹脂組成物を厚み25μmのPETフィルムの離型処理面上に塗工した。PETフィルムとしては、XG284(東レ社製)を用いた。その後、100℃のギアオーブン内で5分間乾燥し、溶媒を揮発させることにより、PETフィルムと、該PETフィルム上に厚さが40μmの樹脂組成物層とを有する未硬化積層フィルムを得た。
実施例及び比較例で得られた各未硬化積層フィルムについて以下の評価を行った。結果を表1に示した。
実施例及び比較例で得られた各未硬化積層フィルムを190℃で90分間加熱した後、基材PETフィルムを剥離し、硬化物を得た。得られた硬化物について、TMA装置を用い、昇温速度10℃/分、力50Nの条件で25℃から150℃までの温度範囲における線膨張係数を測定した。TMA装置としては、TMA7100(日立ハイテクサイエンス社製)を用いた。
実施例及び比較例で得られた各未硬化積層フィルムを190℃で90分間加熱した後、基材PETフィルムを剥離し、硬化物を得た。得られた硬化物を幅2mm、長さ100mmの大きさに裁断した。裁断された硬化物について、空洞共振摂動法誘電率測定装置及びネットワークアナライザーを用いて、空洞共振法で23℃、周波数5GHzの条件にて誘電正接を測定した。空洞共振摂動法誘電率測定装置としては、CP521(関東電子応用開発社製)を用い、ネットワークアナライザーとしては、N5224A PNA(キーサイトテクノロジー社製)を用いた。
実施例及び比較例で得られた各未硬化積層フィルムを200℃で3時間加熱した後、基材PETフィルムを剥離し、硬化物を得た。得られた硬化物を幅10mm、長さ100mmの大きさに裁断した。裁断された硬化物について、引張試験機を用いて、チャック間距離60mm、引張速度5mm/分、初期張力0.35Nの条件にて最大破断点伸度を測定した。引張試験機としては、UCT-500(ORIENTEC社製)を用いた。
Claims (8)
- 分子量が1万以下である請求項1、2又は3記載のエステル化合物。
- 硬化性樹脂と硬化剤とを含有する樹脂組成物であって、
前記硬化剤は、請求項1、2、3又は4記載のエステル化合物を含む樹脂組成物。 - 硬化性樹脂は、エポキシ樹脂を含む請求項5記載の樹脂組成物。
- 請求項5又は6記載の樹脂組成物の硬化物。
- 請求項5又は6記載の樹脂組成物を用いてなるビルドアップフィルム。
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