WO2014203868A1 - 芳香族炭化水素ホルムアルデヒド樹脂、変性芳香族炭化水素ホルムアルデヒド樹脂及びエポキシ樹脂、並びにそれらの製造方法 - Google Patents
芳香族炭化水素ホルムアルデヒド樹脂、変性芳香族炭化水素ホルムアルデヒド樹脂及びエポキシ樹脂、並びにそれらの製造方法 Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G16/00—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00
- C08G16/02—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes
- C08G16/0212—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes with acyclic or carbocyclic organic compounds
- C08G16/0218—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes with acyclic or carbocyclic organic compounds containing atoms other than carbon and hydrogen
- C08G16/0225—Condensation polymers of aldehydes or ketones with monomers not provided for in the groups C08G4/00 - C08G14/00 of aldehydes with acyclic or carbocyclic organic compounds containing atoms other than carbon and hydrogen containing oxygen
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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
- C08G10/00—Condensation polymers of aldehydes or ketones with aromatic hydrocarbons or halogenated aromatic hydrocarbons only
- C08G10/02—Condensation polymers of aldehydes or ketones with aromatic hydrocarbons or halogenated aromatic hydrocarbons only of aldehydes
- C08G10/04—Chemically-modified polycondensates
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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
- C08G14/00—Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00
- C08G14/02—Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00 of aldehydes
- C08G14/04—Condensation polymers of aldehydes or ketones with two or more other monomers covered by at least two of the groups C08G8/00 - C08G12/00 of aldehydes with phenols
- C08G14/12—Chemically modified polycondensates
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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
- 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
- C08G59/02—Polycondensates containing more than one epoxy group per molecule
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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
- 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
- C08G59/02—Polycondensates containing more than one epoxy group per molecule
- C08G59/04—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof
-
- 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
- C08G59/02—Polycondensates containing more than one epoxy group per molecule
- C08G59/04—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof
- C08G59/06—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof of polyhydric phenols
- C08G59/08—Polycondensates containing more than one epoxy group per molecule of polyhydroxy compounds with epihalohydrins or precursors thereof of polyhydric phenols from phenol-aldehyde condensates
Definitions
- the present invention relates to an aromatic hydrocarbon formaldehyde resin, a modified aromatic hydrocarbon formaldehyde resin, an epoxy resin, and methods for producing them.
- Non-Patent Document 1 Studies have been made to obtain an aromatic hydrocarbon resin by subjecting a biphenyl compound and formaldehyde to a condensation reaction (see Non-Patent Document 1).
- R represents an organic group having 1 to 10 carbon atoms, and m and n represent integers satisfying 1 ⁇ m + n ⁇ 10, m ⁇ 0 and n ⁇ 1.
- R represents an organic group having 1 to 10 carbon atoms, and m and n represent integers satisfying 1 ⁇ m + n ⁇ 10, m ⁇ 0 and n ⁇ 1.
- R represents an organic group having 1 to 10 carbon atoms
- m and n represent integers satisfying 1 ⁇ m + n ⁇ 10, m ⁇ 0 and n ⁇ 1.
- the aromatic hydrocarbon formaldehyde resin according to any one of [1] to [6] and at least one selected from the group consisting of compounds represented by the following formulas (2) and (3): A modified aromatic hydrocarbon formaldehyde resin obtained by reacting in the presence of an acidic catalyst.
- X and Y each independently represent a hydrogen atom or an organic group having 1 to 10 carbon atoms, and a and b are 1 ⁇ a + b ⁇ 10, a ⁇ 1 and b ⁇ 0.
- the compound represented by the formulas (2) and (3) is at least one selected from the group consisting of phenol, cresol, catechol, hydroquinone, phenylphenol, biphenol, naphthol, dihydroxynaphthalene, hydroxyanthracene, and dihydroxyanthracene.
- X and Y each independently represent a hydrogen atom or an organic group having 1 to 10 carbon atoms, and a and b are 1 ⁇ a + b ⁇ 10, a ⁇ 1 and b ⁇ 0.
- c represents an integer of 0 to 2.
- diarylmethane which must be produced by a reaction substrate that has been conventionally used, can be further sufficiently reduced compared to the conventional method. It is possible to provide an excellent aromatic hydrocarbon formaldehyde resin, a modified aromatic hydrocarbon formaldehyde resin and an epoxy resin obtained therefrom, and a production method thereof.
- the aromatic hydrocarbon formaldehyde resin of the present embodiment is an acidic hydrocarbon compound represented by the following formula (1) (hereinafter also referred to as “hydroxymethyl-substituted aromatic hydrocarbon compound”) and formaldehyde. It can be obtained by carrying out a condensation reaction in the presence of a catalyst.
- the hydroxymethyl-substituted aromatic hydrocarbon compound as a raw material has a structure in which one hydroxymethyl group is bonded in advance, so that these compounds undergo a dehydration condensation reaction.
- a compound represented by the following formula (5) crosslinked with a methyleneoxymethylene group is obtained, diarylmethane can be further reduced more than before.
- the main product of the aromatic hydrocarbon formaldehyde resin obtained by using the reaction substrate of the present embodiment is a hydroxymethyl group previously bonded on the aromatic ring, a methylene group formed from the added formaldehyde, and an oxy It has a structure containing a methylene group.
- the main product is obtained as a mixture of a plurality of compounds having different positions and numbers bonded to the aromatic rings of the substituents. More specifically, for example, a biphenylformaldehyde resin obtained by reacting biphenylmethanol in the presence of formalin and concentrated sulfuric acid is a compound represented by the following formulas (6), (7), (8) and (9): Is a mixture having a representative composition.
- the aromatic hydrocarbon compound represented by the following formula (1) of the present embodiment is a compound in which at least one hydrogen atom on the aromatic ring of biphenyl is substituted with a hydroxymethyl group.
- examples of such compounds include biphenylmethanol, biphenyldimethanol, methylbiphenylmethanol, methylbiphenyldimethanol, dimethylbiphenylmethanol and dimethylbiphenyldimethanol.
- R represents an organic group having 1 to 10 carbon atoms
- m and n represent integers satisfying 1 ⁇ m + n ⁇ 10, m ⁇ 0, and n ⁇ 1.
- R is preferably an alkyl group having 1 to 10 carbon atoms or an allyl group having 3 to 10 carbon atoms, and an alkyl group having 1 to 4 carbon atoms or 3 carbon atoms. It is more preferable that the allyl group is ⁇ 6, m is 0-2, and n is 1-2.
- alkyl group and allyl group examples include a methyl group, an ethyl group, a propyl group, a butyl group, a pentyl group, a hexyl group, a heptyl group, an octyl group, a nonyl group, a decyl group, a propenyl group, and a butenyl group. Pentenyl group, hexenyl group, heptenyl group, octenyl group, nonenyl group and decenyl group.
- the compound represented by the above formula (1) is more preferably biphenylmethanol, and particularly preferably 4-biphenylmethanol.
- the formaldehyde in the present embodiment is not particularly limited, and may be used in the form of an aqueous formaldehyde solution that is usually industrially available.
- the formaldehyde in the present embodiment includes formaldehyde generated by using a compound that generates formaldehyde such as paraformaldehyde and trioxane. Among these, an aqueous formaldehyde solution is preferable from the viewpoint of suppressing gelation.
- the molar ratio of the compound represented by the above formula (1) and formaldehyde (the compound represented by the above formula (1): formaldehyde) is not particularly limited, but preferably 1: 1 to 1:20, more preferably 1: 1.5 to 1: 17.5, more preferably 1: 2 to 1:15, still more preferably 1: 2 to 1: 12.5, and more More preferably, it is 1: 2.5 to 1:10, particularly preferably 1: 3 to 1:10, and most preferably 1: 3 to 1: 5.
- the aromatic hydrocarbon formaldehyde resin of the present embodiment can have more crosslinked structures by subjecting the compound represented by the above formula (1) and formaldehyde to a condensation reaction in the above-described proportion.
- the amount of the hydroxymethyl-substituted aromatic hydrocarbon compound remaining unreacted can be further reduced by subjecting the compound represented by the above formula (1) and formaldehyde to a condensation reaction at the ratio as described above.
- the yield of aromatic hydrocarbon formaldehyde resin can be kept higher.
- the acid catalyst in the present embodiment is not particularly limited, and known inorganic acids and organic acids can be used.
- the acidic catalyst include inorganic acids such as hydrochloric acid, sulfuric acid, phosphoric acid, hydrobromic acid and hydrofluoric acid; oxalic acid, malonic acid, succinic acid, adipic acid, sebacic acid, citric acid, fumaric acid, maleic acid, Organic acids such as formic acid, p-toluenesulfonic acid, methanesulfonic acid, trifluoroacetic acid, dichloroacetic acid, trichloroacetic acid, trifluoromethanesulfonic acid, benzenesulfonic acid, naphthalenesulfonic acid and naphthalenedisulfonic acid; zinc chloride, aluminum chloride, chloride Lewis acids such as iron and boron trifluoride; and solid acids such as silicotungstic acid, phosphotungstic acid, silicomolybdic acid
- An acidic catalyst is used individually by 1 type or in combination of 2 or more types.
- the amount of the acidic catalyst used is not particularly limited, but is preferably 0.0001 to 100 parts by weight, more preferably 100 parts by weight of the total amount of the compound represented by the above formula (1) and formaldehyde.
- the amount is 0.001 to 85 parts by mass, more preferably 0.001 to 70 parts by mass.
- the method for adding the acidic catalyst into the reaction system is not particularly limited, and it may be added all at once or in divided portions.
- the pressure of the condensation reaction in the present embodiment is not particularly limited, and may be a normal pressure, or may be a pressure, that is, a pressure higher than the normal pressure.
- the method for the condensation reaction in the present embodiment is not particularly limited.
- a solvent inert to the condensation reaction can be used as necessary.
- solvents include aromatic hydrocarbons such as toluene, ethylbenzene and xylene; saturated aliphatic hydrocarbons such as heptane and hexane; alicyclic hydrocarbons such as cyclohexane; ethers such as dioxane and dibutyl ether; -Alcohols such as propanol; ketones such as methyl isobutyl ketone; carboxylic acid esters such as ethyl propionate; and carboxylic acids such as acetic acid.
- Solvents inert to the condensation reaction are used singly or in combination of two or more.
- the condensation reaction in the present embodiment is not particularly limited, but is preferably performed in the presence of alcohol.
- alcohol coexists, the end of the resin is sealed with alcohol and has a lower molecular weight and lower dispersion (ie, a narrower molecular weight distribution, in other words, weight average molecular weight / number average molecular weight (Mw / Mn) is obtained.
- Mw / Mn weight average molecular weight / number average molecular weight
- the alcohol is not particularly limited, and examples thereof include monools having 1 to 12 carbon atoms and diols having 1 to 12 carbon atoms. Alcohol may be used alone or in combination. Of these, propanol, butanol, octanol and 2-ethylhexanol are preferable from the viewpoint of productivity of the aromatic hydrocarbon formaldehyde resin.
- the amount of alcohol to be added is not particularly limited.
- 1 to 10 equivalents of hydroxyl group of the alcohol with respect to 1 equivalent of hydroxymethyl group in the compound represented by the above formula (1) is preferred.
- a hydroxymethyl-substituted aromatic hydrocarbon compound, formaldehyde and an acidic catalyst may be simultaneously added to the reaction system, or a hydroxymethyl-substituted aromatic hydrocarbon compound is present in formaldehyde and an acidic catalyst. It may be added sequentially to the system.
- the sequential addition method is to increase the oxygen content in the resulting aromatic hydrocarbon formaldehyde resin and modify the resin later (hereinafter, this modification step is referred to as “modification step”). Is preferable from the viewpoint that it can be reacted more with the compounds represented by the following formulas (2) and (3).
- the reaction time for the condensation reaction is not particularly limited, but is preferably 0.5 to 30 hours, more preferably 0.5 to 20 hours, and further preferably 0.5 to 10 hours. By setting the reaction time in such a range, an aromatic hydrocarbon formaldehyde resin excellent in heat decomposition resistance can be obtained more economically and industrially more advantageously.
- the reaction temperature in the condensation reaction is not particularly limited, but is preferably 80 to 300 ° C, more preferably 85 to 270 ° C, and still more preferably 90 to 240 ° C. By setting the reaction temperature in such a range, the aromatic hydrocarbon formaldehyde resin can be obtained more economically and industrially more advantageously.
- the above-mentioned solvent inert to the condensation reaction is further added to the system and diluted, and then allowed to stand for two-phase separation.
- the acidic phase is sufficiently removed from the resin phase by further washing the resin phase with water.
- the aromatic hydrocarbon formaldehyde resin of this Embodiment is obtained by removing the added solvent and unreacted raw material from a resin phase by general methods, such as distillation.
- the aromatic hydrocarbon formaldehyde resin obtained by the above reaction has a bond in which at least a part of the aromatic ring is represented by the following formula (i) and / or the following formula (ii) from the viewpoint of the balance of oxygen content and heat resistance. It is preferable to have a structure crosslinked by a bond represented by -(CH 2 ) p- (i) —CH 2 —A— (ii)
- p represents an integer of 1 to 10
- A represents a divalent group represented by (OCH 2 ) m
- m represents an integer of 1 to 10 Indicates.
- At least a part of the aromatic ring is a bond in which a bond represented by — (CH 2 ) p — and a bond represented by — (OCH 2 ) m — are randomly arranged, for example , —CH 2 —OCH 2 —CH 2 —, — (CH 2 ) 2 —OCH 2 —, and —CH 2 —OCH 2 —OCH 2 —CH 2 —.
- the aromatic hydrocarbon formaldehyde resin of the present embodiment is not particularly limited, but is measured by gel permeation chromatography (hereinafter referred to as “GPC”) analysis from the viewpoint of thermal decomposition resistance and solubility in a solvent.
- GPC gel permeation chromatography
- the polystyrene-equivalent number average molecular weight (Mn) is preferably 200 to 4000, more preferably 250 to 3500, and still more preferably 300 to 4000.
- the aromatic hydrocarbon formaldehyde resin of the present embodiment is not particularly limited, but has a polystyrene-equivalent weight average molecular weight (Mw) measured by GPC analysis of 200 to 200 from the viewpoint of thermal decomposition resistance and solubility in a solvent. It is preferably 25000, more preferably 250 to 20000, and still more preferably 300 to 15000.
- Mw polystyrene-equivalent weight average molecular weight measured by GPC analysis of 200 to 200 from the viewpoint of thermal decomposition resistance and solubility in a solvent. It is preferably 25000, more preferably 250 to 20000, and still more preferably 300 to 15000.
- the aromatic hydrocarbon formaldehyde resin of the present embodiment is not particularly limited, but the dispersity (Mw / Mn) is preferably 1.0 to 5.0 from the viewpoint of thermal decomposition resistance and melt viscosity. Preferably it is 1.1-4.5, More preferably, it is 1.2-4.0.
- the aromatic hydrocarbon formaldehyde resin of this Embodiment is not specifically limited, From a viewpoint of the thermal decomposition property and the reactivity with the compound represented by following formula (2) and (3) in the modification
- the oxygen content is preferably 7 to 18% by mass, more preferably 7 to 17% by mass, and still more preferably 8 to 17% by mass. Since the oxygen content in the resin increases in proportion to the reactivity of the denaturation reaction in the denaturation step described later, the following formulas (2) and (3) are obtained by setting the oxygen content in such a range. More compounds can be reacted.
- the oxygen content in the resin is measured by organic elemental analysis.
- the aromatic hydrocarbon formaldehyde resin of the present embodiment is not particularly limited, but is preferably a liquid at room temperature (25 ° C.) from the viewpoint of thermal decomposition resistance and handling. From the same viewpoint, the aromatic hydrocarbon formaldehyde resin preferably has a softening point of 140 ° C. or lower, more preferably 130 ° C. or lower, and further preferably 120 ° C. or lower. The lower limit of the softening point is not particularly limited. In this specification, a softening point is measured based on the method as described in an Example.
- the aromatic hydrocarbon formaldehyde resin of the present embodiment is not particularly limited, but preferably has a hydroxyl value of 0 to 100 mgKOH / g, more preferably 5 to 5 from the viewpoint of thermal decomposition resistance and solubility in a solvent. 95 mgKOH / g, more preferably 10 to 90 mgKOH / g. In this specification, a hydroxyl value is measured based on the method as described in an Example.
- the aromatic hydrocarbon formaldehyde resin of the present embodiment is preferably substantially free of diarylmethane.
- substantially free of diarylmethane means that a peak of diarylmethane is not detected in GPC analysis based on the method described in the Examples below.
- the modified aromatic hydrocarbon formaldehyde resin of the present embodiment is at least one selected from the group consisting of the aromatic hydrocarbon formaldehyde resin of the present embodiment and compounds represented by the following formulas (2) and (3). Are heated and reacted in the presence of an acidic catalyst. In the present embodiment, this reaction is referred to as “denaturation reaction”.
- X and Y each independently represent a hydrogen atom or an organic group having 1 to 10 carbon atoms, and a and b are 1 ⁇ a + b ⁇ 10, a ⁇ 1 and c represents an integer satisfying b ⁇ 0, and c represents an integer of 0 to 2.
- the compounds represented by the above formula (2) are used singly or in combination of two or more.
- X and Y are preferably each independently a hydrogen atom, an alkyl group having 6 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, or a cyclohexyl group. More preferably, they are a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an aryl group having 6 to 10 carbon atoms, or a cyclohexyl group, a and b are each independently 1 to 2, and c is 0 to 2 Preferably there is. Further, X is more preferably a hydrogen atom from the viewpoint of easily obtaining an epoxy resin described later.
- Specific examples of the compound represented by the formula (2) include, for example, phenol, methoxyphenol, benzoxyphenol, catechol, resorcinol, hydroquinone, cresol, phenylphenol, naphthol, methoxynaphthol, benzoxynaphthol, dihydroxynaphthalene, Examples include hydroxyanthracene, methoxyanthracene, benzoxyanthracene and dihydroxyanthracene.
- the phenol derivative is phenol, phenylphenol, naphthol, methoxynaphthol, benzoxynaphthol, dihydroxynaphthalene, hydroxyanthracene, methoxyanthracene. More preferred are benzoxyanthracene and dihydroxyanthracene.
- those having a hydroxy group are more preferred because they are excellent in crosslinkability with an acid crosslinking agent, and phenol, phenylphenol, naphthol, dihydroxynaphthalene, hydroxyanthracene and dihydroxyanthracene are particularly preferred.
- X and Y are preferably each independently a hydrogen atom, an alkyl group having 6 to 10 carbon atoms, an aryl group having 6 to 10 carbon atoms, or a cyclohexyl group. More preferably, they are a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an aryl group having 6 to 10 carbon atoms, or a cyclohexyl group, a and b are each independently 1 to 2, and c is 0 to 2 Preferably there is. Further, X is more preferably a hydrogen atom from the viewpoint of easily obtaining an epoxy resin described later.
- Specific examples of the compound represented by the above formula (3) include biphenol, methoxybiphenol, and benzoxybiphenol. Among these, biphenol is preferable from the viewpoint of availability.
- the amount of the compounds represented by the above formulas (2) and (3) is preferably 0.1 to 5 moles relative to 1 mole of oxygen atoms contained in the aromatic hydrocarbon formaldehyde resin, preferably 0.2 to The amount is more preferably 4 mol, and further preferably 0.3 to 3 mol.
- the molecular weight of the modified aromatic hydrocarbon formaldehyde resin is represented by the number of moles of oxygen atoms contained in the aromatic hydrocarbon formaldehyde resin (hereinafter referred to as “the number of moles of oxygen contained”), and the above formulas (2) and (3). Affected by the amount of compound used. As they both increase, the molecular weight of the modified aromatic hydrocarbon formaldehyde resin decreases.
- the number of moles of oxygen contained can be calculated according to the following calculation formula by measuring the oxygen content (% by mass) in the aromatic hydrocarbon formaldehyde resin by organic elemental analysis.
- Number of moles of oxygen contained (mol) Amount of aromatic hydrocarbon formaldehyde resin used (g) ⁇ Oxygen content (mass%) / 16
- the acidic catalyst that can be used for the modification reaction in the present embodiment is not particularly limited, and can be appropriately selected from known inorganic acids and organic acids.
- the acidic catalyst include inorganic acids such as hydrochloric acid, sulfuric acid, phosphoric acid, hydrobromic acid and hydrofluoric acid; oxalic acid, malonic acid, succinic acid, adipic acid, sebacic acid, citric acid, fumaric acid, maleic acid, Organic acids such as formic acid, p-toluenesulfonic acid, methanesulfonic acid, trifluoroacetic acid, dichloroacetic acid, trichloroacetic acid, trifluoromethanesulfonic acid, benzenesulfonic acid, naphthalenesulfonic acid and naphthalenedisulfonic acid; zinc chloride, aluminum chloride, chloride Lewis acids such as iron and boron trifluoride; and solid acids such as silicotungstic acid, phosphotungs
- sulfuric acid oxalic acid, citric acid, p-toluenesulfonic acid, methanesulfonic acid, trifluoromethanesulfonic acid, benzenesulfonic acid, naphthalenesulfonic acid, naphthalene disulfonic acid and phosphorus are used from the viewpoint of environmental problems and production.
- Tungstic acid is preferred.
- An acidic catalyst is used individually by 1 type or in combination of 2 or more types.
- the amount of the acidic catalyst used is not particularly limited, but is preferably 0.0001 to 100 parts by mass, more preferably 0.001 to 85 parts by mass, and still more preferably 0 to 100 parts by mass of the aromatic hydrocarbon formaldehyde resin. 0.001 to 70 parts by mass.
- the method for the modification reaction in the present embodiment is not particularly limited.
- the method is, for example, heating and refluxing the raw material and the acidic catalyst at a temperature equal to or higher than the temperature at which the raw materials to be used are compatible with each other at normal pressure in the presence of the acidic catalyst, Perform while distilling off.
- the pressure during the denaturation reaction may be normal pressure, or may be increased, that is, a pressure higher than normal pressure.
- an inert gas such as nitrogen, helium and argon may be vented into the reaction system as necessary.
- a solvent inert to the condensation reaction can be used as necessary.
- solvents include aromatic hydrocarbons such as toluene, ethylbenzene and xylene; saturated aliphatic hydrocarbons such as heptane and hexane; alicyclic hydrocarbons such as cyclohexane; ethers such as dioxane and dibutyl ether; -Alcohols such as propanol; ketones such as methyl isobutyl ketone; carboxylic acid esters such as ethyl propionate; and carboxylic acids such as acetic acid.
- Solvents inert to the condensation reaction are used singly or in combination of two or more.
- the reaction time of the modification reaction in the present embodiment is not particularly limited, but is preferably 0.5 to 20 hours, more preferably 1 to 15 hours, and further preferably 2 to 10 hours. By setting the reaction time in such a range, a modified aromatic hydrocarbon formaldehyde resin excellent in heat decomposition resistance and solubility in a solvent can be obtained more economically and industrially more advantageously.
- the reaction temperature of the modification reaction in the present embodiment is not particularly limited, but is preferably 80 to 300 ° C, more preferably 85 to 270 ° C, and still more preferably 90 to 240 ° C. By setting the reaction temperature in such a range, a modified aromatic hydrocarbon formaldehyde resin excellent in heat decomposition resistance can be obtained more economically and industrially more advantageously.
- the solvent inert to the condensation reaction is further added to the system for dilution, and then allowed to stand for two-phase separation.
- the acidic phase is sufficiently removed from the resin phase by further washing the resin phase with water.
- the modified aromatic hydrocarbon formaldehyde resin of the present embodiment is obtained by removing the added solvent and unreacted raw material from the resin phase by a general method such as distillation.
- the modified aromatic hydrocarbon formaldehyde resin of the present embodiment has higher thermal decomposition resistance (thermal weight loss rate) and hydroxyl value than the aromatic hydrocarbon formaldehyde resin before modification.
- thermal decomposition resistance thermal weight loss rate
- the thermal decomposition resistance thermal weight loss rate
- the hydroxyl value Increases by about 1 to 300 mgKOH / g.
- the “thermal weight loss rate” is measured according to the method described in the examples.
- the modified aromatic hydrocarbon formaldehyde resin of the present embodiment is not particularly limited, but has a polystyrene-equivalent number average molecular weight (Mn) measured by GPC analysis of 200 to 200 from the viewpoint of thermal decomposition resistance and solubility in a solvent. It is preferably 4000, more preferably 250 to 3500, and still more preferably 300 to 3000.
- the modified aromatic hydrocarbon formaldehyde resin of the present embodiment is not particularly limited, but has a polystyrene-equivalent weight average molecular weight (Mw) of 200 to 200 as measured by GPC analysis from the viewpoint of thermal decomposition resistance and solubility in a solvent. It is preferably 25000, more preferably 250 to 20000, and still more preferably 300 to 150,000.
- Mw polystyrene-equivalent weight average molecular weight
- the modified aromatic hydrocarbon formaldehyde resin of the present embodiment is not particularly limited, but the dispersity (Mw / Mn) is 1.0 to 5.0 from the viewpoint of thermal decomposition resistance and solubility in a solvent. Is more preferably 1.1 to 4.5, and still more preferably 1.2 to 4.0.
- the modified aromatic hydrocarbon formaldehyde resin of the present embodiment is not particularly limited, but the softening point is preferably 50 to 240 ° C., more preferably 60 to 230 ° C., from the viewpoint of thermal decomposition resistance and handling. More preferably, it is 70 to 220 ° C.
- the modified aromatic hydrocarbon formaldehyde resin of the present embodiment is not particularly limited, but preferably has a hydroxyl value of 60 to 380 mgKOH / g, more preferably 70 from the viewpoint of thermal decomposition resistance and solubility in a solvent. 370 mg KOH / g, more preferably 80-360 mg KOH / g.
- the epoxy resin of the present embodiment is obtained by reacting the modified aromatic hydrocarbon formaldehyde resin with epichlorohydrin.
- the amount of epichlorohydrin used is preferably 0.8 to 2 mol, more preferably 0.9 to 1.2 mol, based on 1 mol of hydroxyl group of the modified aromatic hydrocarbon formaldehyde resin.
- the reaction between the modified aromatic hydrocarbon formaldehyde resin and epichlorohydrin is performed in the presence of an alkali metal hydroxide.
- the alkali metal hydroxide is not particularly limited, and examples thereof include sodium hydroxide and potassium hydroxide. Among these, sodium hydroxide is preferable from the viewpoint of economy.
- An alkali metal hydroxide is used individually by 1 type or in combination of 2 or more types.
- the amount of the alkali metal hydroxide used is not particularly limited, but is preferably 10 to 150 parts by mass, more preferably 20 to 100 parts by mass with respect to 100 parts by mass of the modified aromatic hydrocarbon formaldehyde resin. By making the usage-amount of an alkali metal hydroxide into such a range, the effect that a ring-closing reaction is completed is acquired.
- the alkali metal hydroxide may be charged all at once in the reaction system, or may be charged separately.
- the method for reacting the modified aromatic hydrocarbon formaldehyde resin and epichlorohydrin in the present embodiment is not particularly limited.
- Examples of the method include a method in which the resin is dissolved in excess epichlorohydrin and then reacted at 60 to 120 ° C. for 1 to 10 hours in the presence of an alkali metal hydroxide such as sodium hydroxide.
- a solvent inert to the reaction can be used as necessary.
- solvents include hydrocarbons such as heptane and toluene, and alcohols such as ethanol, propanol and butanol. These solvents are used singly or in combination of two or more.
- the reaction time of the modification reaction in the present embodiment is not particularly limited, but is preferably 0.5 to 20 hours, more preferably 1 to 15 hours, and further preferably 2 to 10 hours. By setting the reaction time in such a range, a modified aromatic hydrocarbon formaldehyde resin excellent in heat decomposition resistance and solubility in a solvent can be obtained more economically and industrially more advantageously.
- the reaction temperature of the reaction between the modified aromatic hydrocarbon formaldehyde resin and epichlorohydrin in the present embodiment is not particularly limited, but is preferably 50 to 150 ° C, more preferably 60 to 120 ° C. By making reaction temperature into such a range, an epoxy resin can be obtained more economically and industrially more advantageously.
- the epoxy resin of this Embodiment is not specifically limited, From a reactive viewpoint, what contains at least 1 type chosen from the group which consists of a structure represented by following formula (11) and (12) is preferable.
- Y has the same meaning as in the above formula (2)
- Z represents a glycidyl group, an aryl group having 6 to 10 carbon atoms or a cyclohexyl group
- a and b represents an integer satisfying 1 ⁇ a + b ⁇ 10, a ⁇ 1 and b ⁇ 0, and c represents an integer of 0 to 2.
- the epoxy resin of the present embodiment is not particularly limited, but the epoxy equivalent is preferably 150 to 1000 g / eq, and more preferably 200 to 500 g / eq. When the epoxy equivalent is in the above range, it tends to be more effective that the moisture absorption rate and the curability can be balanced.
- the epoxy equivalent is measured according to the method described in the following examples.
- the content of hydrolyzable halogen that may cause corrosion of the wiring can be further reduced.
- the content of hydrolyzable halogen contained in the epoxy resin of the present embodiment is preferably 2000 ppm or less, more preferably 1000 ppm or less, and 750 ppm with respect to 100 parts by mass of the epoxy resin. More preferably, it is as follows.
- the hydrolyzable halogen content is measured according to the method described in the following examples.
- the aromatic hydrocarbon formaldehyde resin of the present embodiment is sufficiently reduced in diarylmethane composed of two molecules of aromatic hydrocarbon and one molecule of formaldehyde, and is therefore excellent in reactivity at the time of modification and thermal decomposition resistance. It is a thing. Therefore, the modified aromatic hydrocarbon formaldehyde resin obtained by modifying this aromatic hydrocarbon formaldehyde resin is used for electrical insulating materials, resist resins, semiconductor sealing resins, printed wiring board adhesives, electrical equipment / electronics. Matrix resins for electrical laminates, build-up laminate materials, resin for fiber reinforced plastics, sealing resins for liquid crystal display panels, paints, various coating agents, adhesives, semiconductors, etc. It can be used for a wide range of applications such as a coating agent or a resist resin in semiconductor manufacturing.
- Carbon and oxygen content (% by mass) in the resin were measured by organic elemental analysis.
- the number of moles of oxygen contained per gram of resin was calculated according to the following formula.
- A Amount of 0.01N silver nitrate standard solution required for titration of sample (mL)
- B Amount of 0.01N silver nitrate standard solution required for titration of blank test (mL)
- N Silver nitrate standard solution
- F titer of silver nitrate standard solution
- W sample amount (g).
- Example 1 (Biphenylmethanol formaldehyde resin) A four-necked flask with an internal volume of 2 L, equipped with a Dimroth condenser, thermometer, and stirring blade, capable of bottoming out, was charged with 584 g of a 37 mass% formalin aqueous solution (7.2 mol as formaldehyde, Mitsubishi Gas Chemical Co., Ltd.) in a nitrogen stream. )) And 98% by mass sulfuric acid (Mitsubishi Gas Chemical Co., Ltd.) (324 g) were charged. While stirring under reflux at about 100 ° C.
- Example 2 Modified biphenylmethanol formaldehyde resin
- a four-necked flask with an internal volume of 0.5 L equipped with a Liebig condenser, a thermometer and a stirring blade 90.0 g of biphenylmethanol formaldehyde resin obtained in Example 1 (0.63 mol of oxygen contained) under nitrogen flow.
- phenol 1.26 mol, manufactured by Wako Pure Chemical Industries, Ltd.
- heated and melted at 95 ° C. and then added 21 mg of paratoluenesulfonic acid (manufactured by Wako Pure Chemical Industries, Ltd.) with stirring.
- Example 3> Modified biphenylmethanol formaldehyde resin
- 120.0 g of biphenylmethanol formaldehyde resin obtained in Example 1 (0.86 mol of oxygen moles contained) under a nitrogen stream.
- 80 g of phenol (0.86 mol, manufactured by Wako Pure Chemical Industries, Ltd.), heated and melted at 95 ° C., and then stirred with 20 mg of paratoluenesulfonic acid (Wako Pure Chemical Industries, Ltd.) In addition, the reaction was started.
- Example 4 Modified biphenylmethanol formaldehyde resin
- a four-necked flask with an internal volume of 0.5 L equipped with a Liebig condenser, a thermometer and a stirring blade 90.0 g of biphenylmethanol formaldehyde resin obtained in Example 1 (0.63 mol of oxygen contained) under nitrogen flow.
- 1-naphthol 183 g (1.26 mol, manufactured by Sugai Chemical Industry Co., Ltd.
- heated and melted at 90 ° C. and then stirred with paratoluenesulfonic acid (manufactured by Wako Pure Chemical Industries, Ltd.) 55 mg
- paratoluenesulfonic acid manufactured by Wako Pure Chemical Industries, Ltd.
- Example 5 Modified biphenylmethanol formaldehyde resin
- 100.0 g of biphenylmethanol formaldehyde resin obtained in Example 1 (0.70 mol of oxygen contained) under nitrogen flow.
- 101 g of 1-naphthol (0.70 mol, manufactured by Sugai Chemical Industry Co., Ltd.)
- paratoluenesulfonic acid manufactured by Wako Pure Chemical Industries, Ltd.
- the reaction was carried out for 3 hours while raising the temperature to 170 ° C.
- metal-xylene manufactured by Mitsubishi Gas Chemical Co., Inc.
- Methyl isobutyl ketone manufactured by Wako Pure Chemical Industries, Ltd.
- ethylbenzene manufactured by Kanto Chemical Co., Inc.
- 200 g of ethylbenzene was added as a diluent solvent and allowed to stand, and then the separated upper phase oil phase was left and the lower phase aqueous phase was removed. Further, the oil phase was neutralized and washed with water, and ethylbenzene was distilled off under reduced pressure to obtain 65.1 g of a colorless and transparent solid biphenylformaldehyde resin.
- ⁇ Comparative example 2> Modified biphenyl formaldehyde resin
- a four-necked flask with an internal volume of 1.0 L equipped with a Liebig condenser, a thermometer and a stirring blade 50.0 g of resin obtained in Comparative Example 1 (containing 0.29 mol of oxygen) under a nitrogen stream, and After charging 54.1 g of phenol (0.58 mol, manufactured by Tokyo Chemical Industry Co., Ltd.) and heating and melting at 120 ° C., 10.4 mg of paratoluenesulfonic acid (manufactured by Wako Pure Chemical Industries, Ltd.) was added while stirring. In addition, the reaction was started. Immediately after heating to 190 ° C.
- the obtained resin had an epoxy equivalent of 250 g / eq and a hydrolyzable halogen content of 400 ppm.
- the aromatic hydrocarbon formaldehyde resin and the modified aromatic hydrocarbon formaldehyde resin obtained by the present embodiment are compared with the aromatic hydrocarbon formaldehyde resin and the modified aromatic hydrocarbon formaldehyde resin synthesized by the conventional method.
- diarylmethane which is a non-reactive dimer, is sufficiently reduced.
- Aromatic hydrocarbon formaldehyde resin, modified aromatic hydrocarbon formaldehyde resin and epoxy resin of the present invention are electrical insulating materials, resist resins, semiconductor sealing resins, printed wiring board adhesives, electrical equipment / electronic equipment, Matrix resin for electrical laminates mounted on industrial equipment, build-up laminate materials, resin for fiber reinforced plastic, sealing resin for liquid crystal display panels, paints, various coating agents, adhesives, coating agents for semiconductors Alternatively, it can be used for a wide range of applications such as resist resins in semiconductor manufacturing.
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Abstract
Description
本発明の課題は、芳香族炭化水素ホルムアルデヒド樹脂の製造において、従来用いられていた反応基質では必ず生成してしまうジアリールメタンを従来よりも更に十分に低減できる、変性時の反応性及び耐熱分解性に優れた芳香族炭化水素ホルムアルデヒド樹脂、それから得られる変性芳香族炭化水素ホルムアルデヒド樹脂及びエポキシ樹脂、並びにそれらの製造方法を提供することにある。
すなわち、本発明は次のとおりである。
[1]下記式(1)で表される芳香族炭化水素化合物(A)とホルムアルデヒド(B)とを酸性触媒の存在下で反応させて得られる芳香族炭化水素ホルムアルデヒド樹脂。
[2]前記芳香族炭化水素化合物(A)とホルムアルデヒド(B)とを酸性触媒の存在下で、(A):(B)=1:1~1:20のモル比で反応させて得られる、[1]に記載の芳香族炭化水素ホルムアルデヒド樹脂。
[3]前記芳香族炭化水素化合物(A)とホルムアルデヒド(B)との反応を、アルコールの共存下で行う、[1]又は[2]に記載の芳香族炭化水素ホルムアルデヒド樹脂。
[4]重量平均分子量が200~25000である、[1]~[3]のいずれか1つに記載の芳香族炭化水素ホルムアルデヒド樹脂。
[5]酸素含有率が7~18質量%である、[1]~[4]のいずれか1つに記載の芳香族炭化水素ホルムアルデヒド樹脂。
[6]ジアリールメタンを実質的に含まない、[1]~[5]のいずれか1つに記載の芳香族炭化水素ホルムアルデヒド樹脂。
[7]下記式(1)で表される芳香族炭化水素化合物(A)とホルムアルデヒド(B)とを酸性触媒の存在下で反応させる、芳香族炭化水素ホルムアルデヒド樹脂の製造方法。
[8][1]~[6]のいずれか1つに記載の芳香族炭化水素ホルムアルデヒド樹脂と、下記式(2)及び(3)で表される化合物からなる群より選ばれる少なくとも一種とを、酸性触媒の存在下で反応させて得られる変性芳香族炭化水素ホルムアルデヒド樹脂。
[9]前記式(2)及び(3)で表される化合物が、フェノール、クレゾール、カテコール、ヒドロキノン、フェニルフェノール、ビフェノール、ナフトール、ジヒドロキシナフタレン、ヒドロキシアントラセン及びジヒドロキシアントラセンからなる群より選ばれる少なくとも一種である、[8]に記載の変性芳香族炭化水素ホルムアルデヒド樹脂。
[10][1]~[6]のいずれか1つに記載の芳香族炭化水素ホルムアルデヒド樹脂と、下記式(2)及び(3)で表される化合物からなる群より選ばれる少なくとも一種とを、酸性触媒の存在下で反応させる、変性芳香族炭化水素ホルムアルデヒド樹脂の製造方法。
[11][8]に記載の変性芳香族炭化水素ホルムアルデヒド樹脂とエピクロロヒドリンとを反応させて得られるエポキシ樹脂。
[12][8]に記載の変性芳香族炭化水素ホルムアルデヒド樹脂とエピクロロヒドリンとを反応させてエポキシ樹脂を得る、エポキシ樹脂の製造方法。
<芳香族炭化水素ホルムアルデヒド樹脂>
本実施の形態の芳香族炭化水素ホルムアルデヒド樹脂は、下記式(1)で表される芳香族炭化水素化合物(以下、「ヒドロキシメチル置換芳香族炭化水素化合物」ともいう。)とホルムアルデヒドとを、酸性触媒の存在下で縮合反応させることにより得られる。
-(CH2)p- (i)
-CH2-A- (ii)
ここで、式(i)中、pは1~10の整数を示し、式(ii)中、Aは(OCH2)mで表される2価の基を示し、mは1~10の整数を示す。
この好適な態様において、芳香環の少なくとも一部は、-(CH2)p-で表される結合と-(OCH2)m-で表される結合とがランダムに配列されている結合、例えば、-CH2-OCH2-CH2-、-(CH2)2-OCH2-、及び-CH2-OCH2-OCH2-CH2-で架橋されていてもよい。
本実施の形態の変性芳香族炭化水素ホルムアルデヒド樹脂は、上記本実施の形態の芳香族炭化水素ホルムアルデヒド樹脂と、下記式(2)及び(3)で表される化合物からなる群より選ばれる少なくとも一種とを酸性触媒の存在下で加熱し、反応させることにより得られる。
本実施の形態においては、この反応を「変性反応」と称する。
また、上記式(2)で表される化合物としては、耐熱分解性に優れる観点から、そのフェノール誘導体が、フェノール、フェニルフェノール、ナフトール、メトキシナフトール、ベンゾキシナフトール、ジヒドロキシナフタレン、ヒドロキシアントラセン、メトキシアントラセン、ベンゾキシアントラセン及びジヒドロキシアントラセンであるものがより好ましい。
また、これらのうち、ヒドロキシ基を有するものは、酸架橋剤との架橋性に優れるため、更に好ましく、フェノール、フェニルフェノール、ナフトール、ジヒドロキシナフタレン、ヒドロキシアントラセン及びジヒドロキシアントラセンが特に好ましい。
含有酸素モル数(mol)=芳香族炭化水素ホルムアルデヒド樹脂の使用量(g)×酸素含有率(質量%)/16
本実施の形態のエポキシ樹脂は、上記変性芳香族炭化水素ホルムアルデヒド樹脂とエピクロロヒドリンとを反応させて得られるものである。エピクロロヒドリンの使用量は、変性芳香族炭化水素ホルムアルデヒド樹脂の水酸基1モルに対して、0.8~2モルであると好ましく、0.9~1.2モルであるとより好ましい。エピクロロヒドリンの使用量をこのような範囲とすることで、得られるエポキシ樹脂の収率をより高く維持できる。
GPC分析により、ポリスチレン換算の重量平均分子量(Mw)、及び数平均分子量(Mn)を求め、それらから分散度(Mw/Mn)を求めた。分析に用いた装置等及び分析条件は下記のとおりとした。
装置:Shodex GPC-101型(昭和電工(株)製製品名)
カラム:LF-804×3
溶離液:THF 1mL/min
温度:40℃
GPC分析により得られた値から、以下の計算式を用いて算出した。
計算式:ジアリールメタンのピーク積分値/樹脂全体のピーク積分値×100(%)
有機元素分析により樹脂中の炭素及び酸素含有率(質量%)を測定した。また、樹脂1g当たりの含有酸素モル数を下記計算式に従って算出した。分析に用いた装置は下記のとおりであった。
装置:CHNコーダーMT-6(ヤナコ分析工業(株)製製品名)
計算式:樹脂1g当たりの含有酸素モル数(mol/g)=酸素含有率(質量%)/16
JIS-K1557に準拠して樹脂の水酸基価を測定した。
JIS-K7236に準拠して樹脂のエポキシ当量を測定した。
ビーカーに試料1.0gを秤量し、ジオキサン30mLを加え、完全に溶解した。そこに1Nアルコール性KOH5mLをホールピペットで加えた後、そのビーカーに冷却管を取りつけ、オイルバス中で30分間煮沸還流した。1Nアルコール性KOHは事前に1Lメスフラスコに水酸化カリウム56.1gを秤量し、95.0%エタノールで溶解し調製した。その後、ビーカーを冷却し、メタノール5mL、80%アセトン水100mLを加えた。そして、ビーカーに回転子を入れ、硝酸2mLを加え、0.01N硝酸銀標準溶液を用い、電位差滴定装置にて滴定した。次式により、試料中の加水分解性ハロゲンの含有量を計算した。
加水分解性ハロゲンの含有量(ppm)=((A-B)×35.5×N×F×1000)/W
上記式中、A:試料の滴定に要した0.01N硝酸銀標準溶液の量(mL)、B:空試験の滴定に要した0.01N硝酸銀標準溶液の量(mL)、N:硝酸銀標準溶液の規定度、F:硝酸銀標準溶液の力価、W:サンプル量(g)である。
(ビフェニルメタノールホルムアルデヒド樹脂)
ジムロート冷却管、温度計及び攪拌翼を備えた、底抜きが可能な内容積2Lの四つ口フラスコに、窒素気流中、37質量%ホルマリン水溶液584g(ホルムアルデヒドとして7.2mol、三菱ガス化学(株)製)及び98質量%硫酸(三菱ガス化学(株)製)324gを仕込んだ。常圧下、100℃前後で還流しながら撹拌しつつ、ここに溶融させた4-ビフェニルメタノール294.4g(1.59mol、三菱ガス化学(株)製)を5時間かけて滴下し、さらに1時間反応させた。次いで、希釈溶媒としてエチルベンゼン(和光純薬工業(株)製)600gをそこに加え、静置後、分離した上相の油相を残し、下相の水相を除去した。さらに、油相に対して中和及び水洗を行い、エチルベンゼン及び未反応原料などを減圧下に留去し、白色固体のビフェニルメタノールホルムアルデヒド樹脂255gを得た。
(変性ビフェニルメタノールホルムアルデヒド樹脂)
リービッヒ冷却管、温度計及び攪拌翼を備えた内容積0.5Lの四つ口フラスコに、窒素気流下で、実施例1で得たビフェニルメタノールホルムアルデヒド樹脂90.0g(含有酸素モル数0.63mol)及びフェノール118g(1.26mol、和光純薬工業(株)製)を仕込み、95℃で加熱溶融させた後、撹拌しながらパラトルエンスルホン酸(和光純薬工業(株)製)21mgを加え、反応を開始した。150℃まで昇温しながら3時間反応させた。反応終了後、混合溶剤(メタキシレン(三菱ガス化学(株)製)/メチルイソブチルケトン(和光純薬工業(株)製)=1/1(質量比))400gをそこに加えて希釈した後、中和及び水洗を行い、溶剤及び未反応原料などを減圧下に除去して、黄色固体の変性ビフェニルメタノールホルムアルデヒド樹脂144gを得た。
(変性ビフェニルメタノールホルムアルデヒド樹脂)
リービッヒ冷却管、温度計及び攪拌翼を備えた内容積0.5Lの四つ口フラスコに、窒素気流下で、実施例1で得たビフェニルメタノールホルムアルデヒド樹脂120.0g(含有酸素モル数0.86mol)、及びフェノール80g(0.86mol、和光純薬工業(株)製)を仕込み、95℃で加熱溶融させた後、撹拌しながらパラトルエンスルホン酸(和光純薬工業(株)製)20mgを加え、反応を開始した。150℃まで昇温しながら3時間反応させた。反応終了後、混合溶剤(メタキシレン(三菱ガス化学(株)製)/メチルイソブチルケトン(和光純薬工業(株)製)=1/1(質量比))400gをそこに加えて希釈した後、中和及び水洗を行い、溶剤及び未反応原料などを減圧下に除去して、黄色固体の変性ビフェニルメタノールホルムアルデヒド樹脂140gを得た。
(変性ビフェニルメタノールホルムアルデヒド樹脂)
リービッヒ冷却管、温度計及び攪拌翼を備えた内容積0.5Lの四つ口フラスコに、窒素気流下で、実施例1で得たビフェニルメタノールホルムアルデヒド樹脂90.0g(含有酸素モル数0.63mol)、及び1-ナフトール183g(1.26mol、スガイ化学工業(株)製)を仕込み、90℃で加熱溶融させた後、撹拌しながらパラトルエンスルホン酸(和光純薬工業(株)製)55mgを加え、反応を開始した。170℃まで昇温しながら3時間反応させた。反応終了後、混合溶剤(メタキシレン(三菱ガス化学(株)製)/メチルイソブチルケトン(和光純薬工業(株)製)=1/1(質量比))400gをそこに加えて希釈した後、中和及び水洗を行い、溶剤及び未反応原料を減圧下に除去して、黒褐色固体の変性ビフェニルメタノールホルムアルデヒド樹脂187gを得た。
(変性ビフェニルメタノールホルムアルデヒド樹脂)
リービッヒ冷却管、温度計及び攪拌翼を備えた内容積0.5Lの四つ口フラスコに、窒素気流下で、実施例1で得たビフェニルメタノールホルムアルデヒド樹脂100.0g(含有酸素モル数0.70mol)及び1-ナフトール101g(0.70mol、スガイ化学工業(株)製)を仕込み、90℃で加熱溶融させた後、撹拌しながらパラトルエンスルホン酸(和光純薬工業(株)製)40mgを加え、反応を開始した。170℃まで昇温しながら3時間反応させた。反応終了後、混合溶剤(メタキシレン(三菱ガス化学(株)製)/メチルイソブチルケトン(和光純薬工業(株)製)=1/1(質量比))400gをそこに加えて希釈した後、中和及び水洗を行い、溶剤及び未反応原料を減圧下に除去して、黒褐色固体の変性ビフェニルメタノールホルムアルデヒド樹脂177gを得た。
(ビフェニルホルムアルデヒド樹脂)
ジムロート冷却管、温度計及び攪拌翼を備えた、底抜きが可能な内容積2Lの四つ口フラスコに、窒素気流中、37質量%ホルマリン水溶液236.9g(ホルムアルデヒドとして2.9mol、三菱ガス化学(株)製)及び98質量%硫酸(関東化学(株)製)163.4gを仕込んだ。常圧下、100℃で撹拌しつつ還流しながら、ビフェニル100.0g(0.65mol、和光純薬工業(株)製)を3時間かけて滴下した後、更に3時間反応させた。次いで、希釈溶媒としてエチルベンゼン(関東化学(株)製)200gを加え、静置した後、分離した上相の油相を残し、下相の水相を除去した。さらに、油相に対して中和及び水洗を行い、エチルベンゼンを減圧下に留去して、無色透明固体のビフェニルホルムアルデヒド樹脂65.1gを得た。
(変性ビフェニルホルムアルデヒド樹脂)
リービッヒ冷却管、温度計及び攪拌翼を備えた内容積1.0Lの四つ口フラスコに、窒素気流下で、比較例1で得た樹脂50.0g(含有酸素モル数0.29mol)、及びフェノール54.1g(0.58mol、東京化成工業(株)製)を仕込み、120℃で加熱溶融させた後、撹拌しながらパラトルエンスルホン酸(和光純薬工業(株)製)10.4mgを加え、反応を開始した。直ちに190℃まで昇温して3時間攪拌した後、混合溶剤(メタキシレン(三菱ガス化学(株)製)/メチルイソブチルケトン(関東化学(株)製)=1/1(質量比))200gをそこに加えて希釈した後、中和及び水洗を行い、溶剤を減圧下に除去して、黒褐色固体の変性ビフェニルホルムアルデヒド樹脂73.0gを得た。
<実施例6>
(ビフェニル系エポキシ樹脂)
冷却管、温度計及び攪拌装置を備えた内容積2Lの四つ口フラスコに、実施例5で得た変性ビフェニルメタノールホルムアルデヒド樹脂150.0g、エピクロロヒドリン434.0g、及びイソプロピルアルコール170.0gを仕込み、40℃に昇温して均一に溶解させた後、48.5質量%の水酸化ナトリウム水溶液74gを60分かけて滴下した。その間に徐々に昇温し、滴下終了後には系内が65℃になるようにした。その後、65℃で30分保持し反応を完了させ、水洗により副生塩及び過剰の水酸化ナトリウムを除去した。次いで、生成物から減圧下で過剰のエピクロロヒドリンとイソプロピルアルコールとを留去して、粗製エポキシ樹脂を得た。この粗製エポキシ樹脂をメチルイソブチルケトン300gに溶解し、48.5質量%の水酸化ナトリウム水溶液5gを加え、65℃で1時間反応した。その後、反応液にリン酸ナトリウム水溶液を加えて、過剰の水酸化ナトリウムを中和し、水洗により副生塩を除去した。そして、減圧下でメチルイソブチルケトンを完全に除去して、目的のエポキシ樹脂170gを得た。得られた樹脂はエポキシ当量が250g/eqであり、加水分解性ハロゲンの含有量が400ppmであった。
Claims (12)
- 前記芳香族炭化水素化合物(A)とホルムアルデヒド(B)とを酸性触媒の存在下で、(A):(B)=1:1~1:20のモル比で反応させて得られる、請求項1に記載の芳香族炭化水素ホルムアルデヒド樹脂。
- 前記芳香族炭化水素化合物(A)とホルムアルデヒド(B)との反応を、アルコールの共存下で行う、請求項1又は2に記載の芳香族炭化水素ホルムアルデヒド樹脂。
- 重量平均分子量が200~25000である、請求項1~3のいずれか一項に記載の芳香族炭化水素ホルムアルデヒド樹脂。
- 酸素含有率が7~18質量%である、請求項1~4のいずれか一項に記載の芳香族炭化水素ホルムアルデヒド樹脂。
- ジアリールメタンを実質的に含まない、請求項1~5のいずれか一項に記載の芳香族炭化水素ホルムアルデヒド樹脂。
- 前記式(2)及び(3)で表される化合物が、フェノール、クレゾール、カテコール、ヒドロキノン、フェニルフェノール、ビフェノール、ナフトール、ジヒドロキシナフタレン、ヒドロキシアントラセン及びジヒドロキシアントラセンからなる群より選ばれる少なくとも一種である、請求項8に記載の変性芳香族炭化水素ホルムアルデヒド樹脂。
- 請求項8記載の変性芳香族炭化水素ホルムアルデヒド樹脂とエピクロロヒドリンとを反応させて得られるエポキシ樹脂。
- 請求項8記載の変性芳香族炭化水素ホルムアルデヒド樹脂とエピクロロヒドリンとを反応させてエポキシ樹脂を得る、エポキシ樹脂の製造方法。
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JP2015522917A JP6474050B2 (ja) | 2013-06-18 | 2014-06-16 | 芳香族炭化水素ホルムアルデヒド樹脂、変性芳香族炭化水素ホルムアルデヒド樹脂及びエポキシ樹脂、並びにそれらの製造方法 |
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