WO2013089006A1

WO2013089006A1 - Method for producing glycidylamine epoxy compound

Info

Publication number: WO2013089006A1
Application number: PCT/JP2012/081557
Authority: WO
Inventors: 秀利加藤; 学哉石川; 仁郎中谷
Original assignee: 東レ・ファインケミカル株式会社
Priority date: 2011-12-15
Filing date: 2012-12-05
Publication date: 2013-06-20
Also published as: JPWO2013089006A1

Abstract

Provided is an efficient method for producing an industrially useful glycidylamine epoxy compound. The present invention produces a glycidylamine epoxy compound represented by general formula (2) by reacting a phenoxyaniline represented by general formula (1) with an epichlorohydrin at 0 to 60°C under the presence of a compound selected from phenols, an organic acid, an inorganic acid and water.

Description

Method for producing glycidylamine epoxy compound

The present invention relates to a method for producing an industrially useful glycidylamine epoxy compound.

Epoxy compounds are compounds widely used in the fields of organic chemistry and polymer chemistry, and are useful in a wide range of industrial applications such as fine chemicals, raw materials for medical and agricultural chemicals and resin materials, and electronic information materials and optical materials. A compound.

In addition, polyfunctional epoxy compounds are generally cured with various curing agents, resulting in cured products with excellent mechanical properties, water resistance, chemical resistance, heat resistance, and electrical properties. It is used in a wide range of fields such as plates and composite materials. In particular, glycidylamine epoxy compounds have low viscosity and high heat resistance, so they are used for space / aircraft composite materials, heat resistant adhesives, semiconductor encapsulants, and the like.

The inventors have proposed a novel glycidylamine-based epoxy compound that is excellent in mechanical properties, chemical resistance, heat resistance, and electrical properties by curing with various curing agents and a method for producing the same (Patent Document 1). ).

However, in the method for producing a glycidylamine-based epoxy compound described in Patent Document 1, if phenoxyaniline and epichlorohydrin are reacted in a solvent containing alcohol, it takes a long time to complete the addition reaction. There was a thing. When the reaction temperature is increased in order to shorten the reaction time, dimers are produced, the chemical purity is lowered, and the viscosity is increased. Furthermore, if there is an alcohol in the reaction system containing the glycidylamine epoxy compound, the liquid separation property is deteriorated when the salt is removed by washing with water, so it is necessary to remove the alcohol by distillation. Since it takes time, it was not necessarily an industrially advantageous method. Moreover, the obtained glycidylamine epoxy compound had low chemical purity, that is, contained a large amount of impurities. For this reason, oligomerization caused by impurities progressed with time, and there was a problem that storage stability was poor. On the other hand, in order to purify the glycidylamine-based epoxy compound by a general vacuum distillation method, the glycidylamine-based epoxy compound undergoes thermal decomposition due to heating during distillation. It was difficult to purify efficiently.

Therefore, a production method for producing a high-purity glycidylamine-based epoxy compound in a short time and on a large scale has been demanded.

International Publication No. 2010/047244

An object of the present invention is to provide a method for efficiently producing an industrially useful glycidylamine-based epoxy compound.

As a result of intensive studies in view of the current state of the prior art, the present inventors have found that the following general formula (1)

Comprising reacting a phenoxyaniline represented by the following formula with epichlorohydrin in the presence of a compound selected from phenols, organic acids, inorganic acids, and water at 0 to 60 ° C.

The method of manufacturing the glycidylamine type | system | group epoxy compound shown by this was discovered.

The glycidylamine-based epoxy compound preferably has a chemical purity of 95% or higher, and a viscosity at 40 ° C. measured using an E-type viscometer is preferably 0.30 Pa · s or lower.

Furthermore, the compound selected from the phenols, organic acids, inorganic acids and water is preferably used in an amount of 0.01 to 20 times by weight with respect to phenoxyaniline.

According to the method for producing a glycidylamine epoxy compound of the present invention, since the addition reaction of phenoxyaniline and epichlorohydrin is performed at a lower temperature than in the conventional method, the time required for production is reached in a short time. Can be shortened. Further, the amount of solvent used can be saved, which is economically advantageous.

Further, in the addition reaction step, as in Patent Document 1, when alcohol is used as a solvent, when purifying a glycidylamine-based epoxy compound, liquid separation with impurities such as salts is deteriorated. Although it is necessary to remove alcohol, in the manufacturing method of the glycidylamine type epoxy compound of this invention, it is not necessary to remove alcohol and the time concerning manufacturing time is shortened. Further, no waste such as distilled alcohol is generated.

The glycidylamine epoxy compound obtained by the production method of the present invention has high chemical purity and excellent storage stability. By curing the resin composition containing this high-purity glycidylamine epoxy compound and a curing agent, high strength, high elastic modulus, high adhesion, high toughness, heat resistance, weather resistance, solvent resistance and resistance A highly functional glycidylamine epoxy resin cured product having excellent impact properties and the like can be obtained. Moreover, when this glycidylamine type | system | group epoxy compound and a normal epoxy resin are mixed and hardened with an amine, the hardened | cured material which can be used for an adhesive agent, a coating material, etc. will be obtained, for example.

The glycidylamine epoxy compound obtained by the production method of the present invention has a high chemical purity, preferably 95% or more, and thus does not need to be purified. Therefore, the yield is good because there is no loss that occurs during purification.

In addition, the glycidylamine-based epoxy compound obtained by the present invention has a viscosity of 40 ° C. measured using an E-type viscometer, preferably 0.30 Pa · s or less, and the viscosity is low. Can be economically advantageous.

The glycidylamine epoxy compound of the present invention is useful in a wide variety of industrial applications such as fine chemicals, medical and agricultural chemical raw materials, resin raw materials, electronic information materials, and optical materials.

Hereinafter, the production method of the glycidylamine epoxy compound of the present invention will be described in detail.

The method for producing a glycidylamine-based epoxy compound of the present invention comprises an addition reaction step in which phenoxyaniline and epichlorohydrin are reacted to obtain phenoxy-N, N-bis (2-hydroxy-3-chloropropyl) aniline; This comprises a cyclization reaction step in which the obtained phenoxy-N, N-bis (2-hydroxy-3-chloropropyl) aniline is reacted with an alkali to obtain a glycidylamine epoxy compound.

In the addition reaction step, the production method of the present invention converts phenoxyaniline represented by the following general formula (1) and epichlorohydrin to 0 in the presence of a compound selected from phenols, organic acids, inorganic acids, and water. The reaction is performed at ˜60 ° C.

Examples of the phenoxyaniline represented by the general formula (1) include 2-phenoxyaniline, 3-phenoxyaniline, and 4-phenoxyaniline. Of these, 4-phenoxyaniline is preferred.

In the present invention, at least one polar compound selected from phenols, organic acids, inorganic acids, and water is used as a solvent for the addition reaction. The solvent may be a combination of two or more of these compounds.

Examples of phenols include phenol, cresol, o-cresol, m-cresol, p-cresol, 2,3-dimethylphenol, 2,4-dimethylphenol, 2,5-dimethylphenol, 2,6-dimethylphenol, Examples include 3,4-dimethylphenol, 3,5-dimethylphenol, bisphenol A, alkylphenols, and the like.

Examples of organic acids include formic acid, acetic acid, propionic acid, butyric acid, isobutyric acid, pivalic acid, valeric acid, isovaleric acid, caproic acid, 2-ethylbutyric acid, caprylic acid, 2-ethylhexanoic acid, oleic acid, acetic anhydride , Propionic anhydride, butyric anhydride, citric acid, lactic acid, oxalic acid, octylic acid, naphthenic acid, neodecanoic acid, caprylic acid, capric acid, lauric acid, myristic acid, palmitic acid, stearic acid, arachidic acid, behenic acid , Ligrinoceric acid, cerotic acid, montanic acid, mellic acid, succinic acid, lindelic acid, tuzuic acid, succinic acid, myristoleic acid, zomarinic acid, petroceric acid, oleic acid, vaccenic acid, gadoleic acid, whale oil, erucin Acid, shark oil acid, linoleic acid, hiragoic acid, eleostearic acid, bunicic acid, tricosanoic acid, linoleic acid Acid, Morokuchi acid, parinaric acid, arachidonic acid, clupanodonic acid, milk shark acid, and herring acid. Of these, formic acid, acetic acid, propionic acid, butyric acid and isobutyric acid are preferred, and acetic acid is more preferred.

Examples of inorganic acids include hydrochloric acid, sulfuric acid, nitric acid, phosphoric acid, boric acid, hydrofluoric acid, and the like. Of these, hydrochloric acid is preferred. Although it does not specifically limit as water, General industrial water can be used. That is, it is water purified by precipitation, coagulation, filtration, distillation, ion exchange, ultrafiltration, reverse osmosis, etc., using river water, groundwater, lake water, seawater, brine, etc. as the water source.

The polar compound selected from phenols, organic acids, inorganic acids, and water is preferably 0.01 to 20 times by weight, more preferably 0.05 to 10 times by weight, and still more preferably 0.0 to 10 times the weight of the phenoxyaniline. It is recommended to use 1 to 5 times by weight. When the amount of the polar solvent comprising a compound selected from phenols, organic acids, inorganic acids and water is 0.01 weight times or more with respect to phenoxyaniline, the addition reaction is completed quickly, which is preferable. Moreover, if it is 20 weight times or less, the compound chosen from phenols, an organic acid, an inorganic acid, and water can be easily remove | excluded by neutralization or distillation, and it is preferable.

In the addition reaction step of the present invention, a compound other than a compound selected from phenols, organic acids, inorganic acids, and water may be added as long as the reaction between phenoxyaniline and epichlorohydrin is not inhibited. Examples of other types of compounds include hydrocarbons, halogenated hydrocarbons, ethers, esters, ketones, nitrogen compounds, and sulfur compounds.

Examples of the hydrocarbon include hexane, 2-methylpentane, 2,2-dimethylbutane, 2,3-dimethylbutane, heptane, octane, isooctane, nonane, trimethylhexane, decane, dodecane, benzene, toluene, xylene, ethylbenzene, Examples include cumene, mesitylene, cyclohexylbenzene, diethylbenzene, cyclopentane, methylcyclopentane, cyclohexane, methylcyclohexane, and ethylcyclohexane.

Examples of the halogenated hydrocarbon include methyl chloride, dichloromethane, chloroform, carbon tetrachloride, ethyl chloride, 1,1-dichloroethane, 1,2-dichloroethane, 1,1,1-trichloroethane, 1,1,2-trichloroethane, 1,1,1,2-tetrachloroethane, 1,1,2,2-tetrachloroethane, pentachloroethane, hexachloroethane, propyl chloride, isopropyl chloride, 1,2-dichloropropane, 1,2,3-trichloropropane, Butyl chloride, sec-butyl chloride, isobutyl chloride, tert-butyl chloride, 1-chloropentane, chlorobenzene, o-dichlorobenzene, m-dichlorobenzene, p-dichlorobenzene, 1,2,4-trichlorobenzene, o-chloro Toluene, p-chlorotoluene, 1-chloro Phthalene, chlorinated naphthalene, methyl bromide, bromoform, ethyl bromide, 1,2-dibromoethane, 1,1,2,2-tetrabromoethane, propyl bromide, isopropyl bromide, bromobenzene, o-dibromobenzene 1-bromonaphthalene, fluorobenzene, benzotrifluoride, hexafluorobenzene, chlorobromomethane, trichlorofluoromethane, 1-bromo-2-chloroethane, 1,1,2-trichloro-1,2,2-trifluoroethane 1,1,2,2-tetrachloro-1,2-difluoroethane and the like.

Examples of ethers include diethyl ether, di-n-propyl ether, diisopropyl ether, dibutyl ether, dihexyl ether, anisole, phenetole, diphenyl ether, dioxane, trioxane, tetrahydrofuran, tetrahydropyran, ethylene glycol dimethyl ether, ethylene glycol dibutyl ether, diethylene glycol dimethyl ether. And diethylene glycol diethyl ether and diethylene glycol dibutyl ether.

Esters include methyl formate, ethyl formate, propyl formate, butyl formate, isobutyl formate, pentyl formate, methyl acetate, ethyl acetate, propyl acetate, isopropyl acetate, butyl acetate, isobutyl acetate, sec-butyl acetate, pentyl acetate, isopentyl acetate , 3-methoxybutyl acetate, sec-hexyl acetate, 2-ethylbutyl acetate, 2-ethylhexyl acetate, cyclohexyl acetate, benzyl acetate, methyl propionate, ethyl propionate, propyl propionate, butyl propionate, propionic acid Examples include isopentyl, methyl isobutyrate, methyl benzoate, ethylene glycol monoacetate, ethylene diacetate, ethylene glycol ester, and diethyl carbonate.

Ketones include acetone, 2-butanone, 2-pentanone, 3-pentanone, 2-hexanone, methyl isobutyl ketone, 2-heptanone, 4-heptanone, diisobutyl ketone, acetylacetone, acetonylacetone, cyclopentanone, cyclohexanone, methyl Examples include cyclohexanone and acetophenone.

Examples of nitrogen compounds include nitromethane, nitroethane, 1-nitropropane, 2-nitropropane, nitrobenzene, acetonitrile, propionitrile, succinonitrile, butyronitrile, isobutyronitrile, valeronitrile, benzonitrile, α-tolunitrile, pyridine. , Α-picoline, β-picoline, γ-picoline, 2,4-lutidine, 2,6-lutidine, quinoline, isoquinoline, N, N-dimethylformamide, N, N-diethylformamide, N, N-dimethylacetamide, etc. Can be mentioned.

Examples of sulfur compounds include carbon disulfide, dimethyl sulfide, diethyl sulfide, thiophene, tetrahydrothiophene, dimethyl sulfoxide, and sulfolane.

Among the other compounds described above, cyclohexane, toluene, xylene, ethylbenzene, cumene, mesitylene and diethylbenzene are particularly preferably used. These other compounds can be used alone or in combination of two or more. The other compound can be used in an amount of preferably 10 times by weight or less, more preferably 5 times by weight or less with respect to phenoxyaniline. By making the amount of other compounds used in such a range, energy required for removing the solvent containing the other compounds is reduced, and waste is also reduced, which is economical.

As the raw material charging order and method, epichlorohydrin or a solution containing epichlorohydrin may be added to a solution containing phenoxyaniline or phenoxyaniline, or conversely epichlorohydrin or epichlorohydrin. A solution containing phenoxyaniline or a solution containing phenoxyaniline may be added. In order to prevent a sudden exotherm or reaction runaway, it is preferable to control the addition rate in accordance with the reaction rate, such as adding the raw material to be added continuously or dividedly over time. The time required for the addition is preferably selected from 0.5 to 6 hours.

The reaction time in the addition reaction step in the present invention is usually 0.5 to 60 hours under stirring after the addition of the raw materials. In the present invention, the time when the residual amount of phenoxy-N- (2-hydroxy-3-chloropropyl) aniline represented by the following general formula (3) contained in the reaction solution, that is, the monochlorohydrin body, is minimized. , Which can be used as a measure of reaction completion.

At the end of the reaction, the content of phenoxy-N- (2-hydroxy-3-chloropropyl) aniline contained in the reaction solution is preferably 5% (HPLC area%) or less, more preferably 2% or less ( HPLC area%). When the amount of phenoxy-N- (2-hydroxy-3-chloropropyl) aniline is 5% or less, formation of a dimer is suppressed, and a glycidylamine epoxy compound having high purity and low viscosity can be obtained. At the end of the addition reaction step, the amount of phenoxy-N, N-bis (2-hydroxy-3-chloropropyl) aniline is preferably 80% (HPLC area%) or more, more preferably 85% (HPLC area%). ) It is good to be above. The content of phenoxy-N- (2-hydroxy-3-chloropropyl) aniline and phenoxy-N, N-bis (2-hydroxy-3-chloropropyl) aniline depends on the chemistry of the glycidylamine epoxy compound described later. It can be measured by the same analytical method as purity.

In the present invention, the addition reaction temperature is 0 to 60 ° C., preferably 10 to 50 ° C., more preferably 20 to 40 ° C. If the addition reaction temperature is less than 0 ° C., it takes a long time to complete the reaction, and if it exceeds 60 ° C., the chemical purity of the resulting glycidylamine-based epoxy compound decreases and the viscosity increases.

In the cyclization reaction step of the present invention, the phenoxy-N, N-bis (2-hydroxy-3-chloropropyl) aniline obtained by the addition reaction is cyclized with an alkali to give the following general formula (2): Prepare the glycidylamine-based epoxy compound shown.

Examples of the alkali used in the cyclization reaction step include lithium hydroxide, sodium hydroxide, potassium hydroxide, barium hydroxide, magnesium hydroxide, calcium hydroxide, lithium carbonate, sodium carbonate, potassium carbonate, barium carbonate, magnesium carbonate, Calcium carbonate, lithium hydrogen carbonate, sodium hydrogen carbonate, potassium hydrogen carbonate, lithium hydride, sodium hydride, potassium hydride, sodium methoxide, potassium methoxide, sodium ethoxide, potassium ethoxide, sodium n-propoxide, potassium n-propoxide, sodium isopropoxide, potassium isopropoxide, sodium n-butoxide, potassium n-butoxide, sodium tert-butoxide, potassium tert-butoxide, sodium te t- amylate, potassium tert- amylate, sodium n- Hekishirato, potassium n- Hekishirato and tetramethylammonium hydroxide is exemplified. Of these, sodium hydroxide and potassium hydroxide are preferably used. These alkalis can be used alone or in combination of two or more.

The alkali itself may be added to the solution obtained by the addition reaction, but may be added dropwise as a water or alcohol solution.

The amount of alkali used is preferably 1 to 10 mole times that of phenoxy-N, N-bis (2-hydroxy-3-chloropropyl) aniline, ie, dichlorohydrin.

The cyclization reaction is preferably performed in the presence of a quaternary ammonium salt and / or a quaternary phosphonium salt. By adding these salts together, the reaction is accelerated and the yield of the glycidylamine epoxy compound is improved.

Quaternary ammonium salts include tetramethylammonium, trimethyl-ethylammonium, dimethyldiethylammonium, triethyl-methylammonium, tripropyl-methylammonium, tributyl-methylammonium, trioctyl-methylammonium, tetraethylammonium, trimethyl-propylammonium, Trimethylphenylammonium, benzyltrimethylammonium, benzyltriethylammonium, diallyldimethylammonium, n-octyltrimethylammonium, stearyltrimethylammonium, cetyldimethylethylammonium, tetrapropylammonium, tetran-butylammonium, β-methylcholine, phenyltrimethylammonium, etc. Bromide, salt Salt, iodine Casio, may be mentioned hydrogen sulfate and hydroxide, and the like. Particularly preferred are trioctyl-methylammonium, tetraethylammonium, benzyltrimethylammonium, benzyltriethylammonium, tetra-n-butylammonium bromide, chloride, hydrogensulfate and hydroxide.

The quaternary phosphonium salts include tetramethylphosphonium, trimethyl-ethylphosphonium, dimethyldiethylphosphonium, triethyl-methylphosphonium, tripropyl-methylphosphonium, tributyl-methylphosphonium, trioctyl-methylphosphonium, tetraethylphosphonium, trimethyl-propylphosphonium. , Trimethylphenylphosphonium, benzyltrimethylphosphonium, diallyldimethylphosphonium, n-octyltrimethylphosphonium, stearyltrimethylphosphonium, cetyldimethylethylphosphonium, tetrapropylphosphonium, tetran-butylphosphonium, phenyltrimethylphosphonium, methyltriphenylphosphonium, ethyltriphenyl Phosphonium And bromide salts, such as tetraphenylphosphonium, chloride salt, iodine Casio, may be mentioned hydrogen sulfate and hydroxide, and the like.

The amount of quaternary ammonium salt and / or quaternary phosphonium salt to be added may be a catalytic amount, and is preferably 0.001 to 0.5 mol times with respect to phenoxyaniline.

In the cyclization reaction step, the reaction temperature is preferably 0 to 90 ° C, more preferably 10 to 70 ° C. The reaction time is preferably 0.5 to 10 hours after the addition of the alkali compound is completed.

In the cyclization reaction step, alkali, quaternary ammonium salt and / or quaternary phosphonium salt may be added to the solution obtained in the addition reaction step, or a new solvent may be added. . As the solvent added in the cyclization reaction step, alcohol solvents, hydrocarbon solvents, ether solvents and ester solvents are preferably used.

Examples of alcohol solvents include primary alcohols such as methanol, ethanol, 1-propanol, 1-butanol, 1-pentanol and 1-hexanol, isopropanol, 2-butanol, 2-pentanol, 3-pentanol, Secondary alcohols such as 2-hexanol, cyclohexanol, 2-heptanol and 3-heptanol, tert-butanol, tert-pentanol, ethylene glycol, ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol mono-n- Propyl ether, ethylene glycol mono-n-butyl ether, ethylene glycol monophenyl ether, diethylene glycol, diethylene glycol monomethyl ether, diethylene Glycol monoethyl ether, diethylene glycol mono-n-propyl ether, diethylene glycol mono-n-butyl ether, triethylene glycol, triethylene glycol monomethyl ether, triethylene glycol mono-n-butyl ether, propylene glycol, propylene glycol monomethyl ether, propylene glycol mono Ethyl ether, propylene glycol mono-n-propyl ether, propylene glycol mono-n-butyl ether, propylene glycol monophenyl ether, dipropylene glycol, dipropylene glycol monomethyl ether, dipropylene glycol monoethyl ether, dipropylene glycol mono-n- Propyl ether, dipropylene glycol mono-n Butyl ether, tripropylene glycol, tripropylene glycol monomethyl ether and tripropylene glycol mono -n- butyl ether.

Examples of the hydrocarbon solvent include hexane, 2-methylpentane, 2,2-dimethylbutane, 2,3-dimethylbutane, heptane, octane, isooctane, nonane, trimethylhexane, decane, dodecane, benzene, toluene, xylene, Examples include ethylbenzene, cumene, mesitylene, cyclohexylbenzene, diethylbenzene, cyclopentane, methylcyclopentane, cyclohexane, methylcyclohexane, and ethylcyclohexane.

Examples of ether solvents include diisopyr ether, dibutyl ether, dihexyl ether, anisole, phenetole, diphenyl ether, tetrahydrofuran, tetrahydropyran, ethylene glycol dibutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether, and diethylene glycol dibutyl ether.

Examples of ester solvents include methyl acetate, ethyl acetate, propyl acetate, isopropyl acetate, butyl acetate, and isobutyl acetate.

Among them, preferred solvents are methanol, ethanol, 1-propanol, 1-butanol, isopropanol, 2-butanol, tert-butanol, cyclohexane, toluene, xylene, ethylbenzene, cumene, mesitylene and diethylbenzene.

The amount of the solvent used in the cyclization reaction step is preferably 0.1 to 20 times by weight, more preferably 1 to 10 times by weight with respect to phenoxyaniline.

In the present invention, the target glycidylamine epoxy compound is isolated by (1) distillation of the reaction solvent, (2) extraction with a hydrophobic solvent, (3) distillation of the extraction solvent, (4) distillation and ( 5) It can be achieved by a combination of general unit operations such as crystallization.

For example, an organic solvent such as toluene is added to the liquid after the cyclization reaction, the target product of the present invention is extracted into the oil layer, and the aqueous layer is separated and removed. Furthermore, it is preferable to completely remove the salt dissolved in the oil layer by washing the obtained oil layer with water. The amount of the organic solvent used is preferably 0.2 to 50 times by weight, more preferably 1 to 20 times by weight with respect to the object of the present invention.

Further, when the glycidylamine epoxy compound as the target product is isolated by crystallization from the obtained oil layer, it is easy to obtain a high purity. Examples of the crystallization method include cooling crystallization, concentrated crystallization, and poor solvent crystallization.

In the distillation and distillation of the extraction solvent, a thin film distillation apparatus may be used. Examples of the thin film distillation apparatus include a centrifugal molecular distillation apparatus and a falling film molecular distillation apparatus. The distilled solvent or the like may be reused.

The chemical purity of the glycidylamine epoxy compound obtained by using the production method of the present invention is preferably 95% or more, more preferably 97% or more. If the chemical purity of the glycidylamine-based epoxy compound is less than 95%, the storage stability is lowered, and the cured resin cured by the curing agent may not have the desired performance. In the present specification, the chemical purity of the glycidylamine-based epoxy compound is a fraction (HPLC area%) of the peak area of the glycidylamine-based epoxy compound as measured by a method described later using high performance liquid chromatography.

Furthermore, the content of the dimer in the glycidylamine-based epoxy compound is preferably 2.2% or less. The dimer in this specification refers to a compound represented by the following general formula (4) or general formula (5).

By setting the content of the dimer within the above-described range, a glycidylamine epoxy compound having high purity and low viscosity can be obtained. In addition, the content of the dimer represented by the general formula (4) and the general formula (5) contained in the glycidylamine-based epoxy compound is determined by the high performance liquid chromatography method for measuring the chemical purity of the glycidylamine-based epoxy compound. The amount of the compound detected in an elution time of 53 to 57 minutes (HPLC area%).

The glycidylamine epoxy compound obtained by using the production method of the present invention has a viscosity at 40 ° C. measured using an E-type viscometer, preferably 0.30 Pa · s or less, more preferably 0.28 Pa · s. It is as follows. When the viscosity of the glycidylamine-based epoxy compound exceeds 0.30 Pa · s, it is economically disadvantageous because the filler cannot be highly filled. In the present specification, the viscosity of the glycidylamine-based epoxy compound is a viscosity when measured at 40 ° C. by a method described later using an E-type viscometer.

Hereinafter, although it demonstrates concretely by an Example, this invention is not restrict | limited only to an Example. In addition, the analytical value of the glycidyl amine epoxy compound obtained in this specification was measured by the following method.

(Chemical purity)
The fraction (HPLC area%) of the peak area of the glycidylamine-based epoxy compound was measured by liquid chromatography under the following conditions (CLASS-VP, manufactured by Shimadzu Corporation) and used as the chemical purity. In addition, the content of the dimer of phenoxy-N- (2-hydroxy-3-chloropropyl) aniline and glycidylamine epoxy compound was also measured under the same analytical conditions. The dimer content of the glycidylamine epoxy compound was measured by the fraction (HPLC area%) of the peak area of the compound detected at an elution time of 53 to 57 minutes.
Column: YMC-Pack ODS-AM303 4.6φ × 250mm
-Column temperature: 40 ° C
Mobile phase: A 0.1% (v / v) phosphoric acid aqueous solution was used as the composition (A) and methanol as the composition (B), and the composition was changed with the composition (A / B) shown in the gradient below.
・ Gradient Time (min) Composition (A / B)
0 90/10
5 90/10
55 10/90
65 10/90
65.1 90/10
・ Flow rate: 1ml / min
・ Injection volume: 3μl
・ Detection: UV 254nm
・ Analysis time: 80 minutes ・ Analysis sample preparation: 0.02 g of sample is weighed and diluted to about 50 ml of methanol. However, as long as the same result as the analysis result based on the above analysis condition is obtained, it is limited to this analysis condition. is not.

(viscosity)
The viscosity at 40 ° C. was measured using an E-type viscometer of a glycidylamine epoxy compound under the following conditions.
Viscometer: RE80U (manufactured by Toki Sangyo Co., Ltd.), rotor code No. 1
・ Temperature: 40 ℃
・ Rotation speed: 20rpm
However, as long as the same result as the analysis result based on the above analysis condition is obtained, the analysis condition is not limited to this.

(Epoxy equivalent)
The epoxy equivalent of the glycidylamine epoxy compound was measured by the hydrochloric acid-dioxane method. Specifically, a dioxane solution of methanol and 0.2N hydrochloric acid was added to a glycidylamine epoxy compound, and the mixture was stirred for 30 minutes to be reacted. A phenolphthalein solution was added as an indicator to the resulting reaction solution and neutralized with a 0.1N aqueous sodium hydroxide solution. From the difference between the titration of the blank titration performed separately and the titration of the neutralization titration, the equivalent of the epoxy group reacted with hydrochloric acid was obtained, and the value obtained by dividing the weight of the glycidylamine epoxy compound by the obtained equivalent was the epoxy equivalent. (G / eq).

In the following examples and comparative examples, the description “XX weight times / 4-phenoxyaniline” means that the added amount is XX weight times the weight of 4-phenoxyaniline. The description “XX mole times / 4-phenoxyaniline” means that the amount added is XX mole times the mole amount of 4-phenoxyaniline.

Example 1
In a four-necked flask equipped with a thermometer, a dropping funnel, a condenser and a stirrer, 210.3 g of epichlorohydrin (6.0 mol times / 4-phenoxyaniline) and 70.12 g of 4-phenoxyaniline (0. 38 mol) was charged. Acetic acid 17.4 g (0.25 weight times / 4-phenoxyaniline) was added dropwise over 30 minutes while purging with nitrogen. The addition reaction was carried out by raising the temperature to 40 ° C. and aging with stirring for 9 hours to produce 4-phenoxy-N, N-bis (2-hydroxy-3-chloropropyl) aniline. Phenoxy-N- (2-hydroxy-3-chloropropyl) aniline was not detected in the reaction solution at the end of the addition reaction. Subsequently, 3.91 g of tetrabutylammonium hydrogen sulfate (0.03 mol times / 4-phenoxyaniline) was added, and then 126.7 g of a 48% aqueous sodium hydroxide solution (3.0 mol times / 4-phenoxyaniline) was added. The ripening reaction was carried out by adding dropwise over 1 hour and further aging with stirring for 4 hours.

After completion of the cyclization reaction, washing was performed with 151.9 g of water, and 112.1 g of water was further added to the organic layer for washing. Epichlorohydrin was removed from the organic layer under reduced pressure to obtain 112.2 g of 4-phenoxy-N, N-diglycidylaniline (weight yield (based on 4-phenoxyaniline): 99.7%). When the chemical purity of the obtained epoxy compound was measured by the method mentioned above using HPLC, it was 98% (HPLC area%). The dimer detected at an elution time of 53 to 57 minutes was 0.1% (HPLC area%), the epoxy equivalent was 159 g / eq, and the viscosity measured at 40 ° C. using an E-type viscometer was 0.26 Pa.・ It was s.

(Example 2)
In the same manner as in Example 1, except that acetic acid was changed to 17.4 g of 35% hydrochloric acid (0.25 times by weight / 4-phenoxyaniline) and the addition reaction time was changed from 9 hours to 21 hours. did. As a result, 111.7 g (weight yield (based on 4-phenoxyaniline): 98.7%) of a brown viscous liquid mainly composed of 4-phenoxy-N, N-diglycidylaniline was obtained. The amount of phenoxy-N- (2-hydroxy-3-chloropropyl) aniline contained in the reaction solution at the end of the addition reaction was 0.3% (HPLC area%). When the chemical purity of this epoxy compound was measured by the method mentioned above using HPLC, it was 97% (HPLC area%). The dimer detected at an elution time of 53 to 57 minutes was 0.5% (HPLC area%), the epoxy equivalent was 159 g / eq, and the viscosity measured at 40 ° C. using an E-type viscometer was 0.25 Pa.・ It was s.

(Example 3)
In a four-necked flask equipped with a thermometer, a dropping funnel, a condenser and a stirrer, 210.2 g of epichlorohydrin (6.0 mole times / 4-phenoxyaniline) and 17.6 g of ion-exchanged water (0.25) Weight times / 4-phenoxyaniline) and 70.61 g (0.38 mol) of 4-phenoxyaniline were charged. The addition reaction was carried out by raising the temperature to 40 ° C. and aging with stirring for 46 hours to produce 4-phenoxy-N, N-bis (2-hydroxy-3-chloropropyl) aniline. Phenoxy-N- (2-hydroxy-3-chloropropyl) aniline was not detected in the reaction solution at the end of the addition reaction. Subsequently, 3.91 g of tetrabutylammonium hydrogen sulfate (0.03 mol times / 4-phenoxyaniline) was added, and then 95.9 g of a 48% aqueous sodium hydroxide solution (3.0 mol times / 4-phenoxyaniline) was added. The ripening reaction was carried out by adding dropwise over 1 hour and further aging with stirring for 4 hours.

After completion of the cyclization reaction, washing was performed with 112.3 g of water, and further 117.1 g of water was added to the organic layer for washing. Epichlorohydrin was removed from the organic layer under reduced pressure to obtain 112.6 g of 4-phenoxy-N, N-diglycidylaniline (weight yield (based on 4-phenoxyaniline): 99.3%). When the chemical purity of the epoxy compound was measured by the above-mentioned method using HPLC, it was 97% (HPLC area%). The dimer detected at an elution time of 53 to 57 minutes was 1.2% (HPLC area%), the epoxy equivalent was 158 g / eq, and the viscosity measured at 40 ° C. using an E-type viscometer was 0.27 Pa.・ It was s.

(Example 4)
In Example 3, it implemented like Example 3 except having changed the reaction temperature in an addition reaction process from 40 degreeC to 60 degreeC, and changing reaction time from 46 hours to 12 hours. As a result, 111.0 g (weight yield (based on 4-phenoxyaniline): 99.2%) of a brown viscous liquid mainly composed of 4-phenoxy-N, N-diglycidylaniline was obtained. Phenoxy-N- (2-hydroxy-3-chloropropyl) aniline was not detected in the reaction solution at the end of the addition reaction. When the chemical purity of this epoxy compound was measured by the method mentioned above using HPLC, it was 96% (HPLC area%). The dimer detected at an elution time of 53 to 57 minutes was 2.0% (HPLC area%), the epoxy equivalent was 160 g / eq, and the viscosity measured at 40 ° C. using an E-type viscometer was 0.29 Pa.・ It was s.

(Example 5)
In Example 4, except that the amount of ion-exchanged water was changed from 17.6 g (0.25 times by weight / 4-phenoxyaniline) to 70.1 g (1.0 times by weight / 4-phenoxyaniline). The same experiment as in Example 4 was performed. As a result, 111.8 g (weight yield (based on 4-phenoxyaniline): 99.8%) of a brown viscous liquid mainly composed of 4-phenoxy-N, N-diglycidylaniline was obtained. The amount of phenoxy-N- (2-hydroxy-3-chloropropyl) aniline contained in the reaction solution at the end of the addition reaction was 0.1% (HPLC area%). When the chemical purity of this epoxy compound was measured by the method mentioned above using HPLC, it was 95% (HPLC area%). The dimer detected at an elution time of 53 to 57 minutes was 2.2% (HPLC area%), the epoxy equivalent was 159 g / eq, and the viscosity measured at 40 ° C. using an E-type viscometer was 0.26 Pa.・ It was s.

(Comparative Example 1)
In a four-necked flask equipped with a thermometer, a dropping funnel, a condenser and a stirrer, 210.0 g of epichlorohydrin (6.0 mol times / 4-phenoxyaniline) and 175.1 g of 2-propanol (2.5 Weight-weight / 4-phenoxyaniline) and 70.46 g (0.38 mol) of 4-phenoxyaniline were charged. The addition reaction was carried out by raising the temperature to 60 ° C. and aging with stirring for 15 hours to produce 4-phenoxy-N, N-bis (2-hydroxy-3-chloropropyl) aniline. The amount of phenoxy-N- (2-hydroxy-3-chloropropyl) aniline contained in the reaction mixture at the end of the addition reaction was 8.0% (HPLC area%). A portion of 247.4 g of 2-propanol and residual epichlorohydrin was distilled off from the addition reaction solution under reduced pressure. To the concentrate were added 140.3 g of toluene (2.0 weight times / 4-phenoxyaniline) and 3.86 g of tetrabutylammonium hydrogen sulfate (0.03 mole times / 4-phenoxyaniline), followed by 48% hydroxylation. 95.2 g of sodium aqueous solution (3.0 mole times / 4-phenoxyaniline) was added dropwise over 30 minutes at a temperature of 30 ° C., and further aged with stirring at 30 ° C. for 4 hours to carry out a cyclization reaction. .

After completion of the cyclization reaction, washing was performed with 112.6 g of water, and further 103.2 g of ion-exchanged water and 34.2 g of methanol were added to the organic layer for washing. Toluene and epichlorohydrin were removed from the organic layer under reduced pressure to obtain 108.5 g of 4-phenoxy-N, N-diglycidylaniline (weight yield (based on 4-phenoxyaniline): 96.0%).

The chemical purity of the obtained epoxy compound was measured by the method described above using HPLC and found to be 92% (HPLC area%). The dimer detected at an elution time of 53 to 57 minutes was 1.3% (HPLC area%), the epoxy equivalent was 167 g / eq, and the viscosity measured at 40 ° C. using an E-type viscometer was 0.24 Pa.・ It was s.

(Comparative Example 2)
In Comparative Example 1, the experiment was performed in the same manner as Comparative Example 1 except that the addition reaction temperature was changed from 60 ° C to 80 ° C. 111.4 g of 4-phenoxy-N, N-diglycidylaniline (weight yield (based on 4-phenoxyaniline): 99.3%) was obtained. The phenoxy-N- (2-hydroxy-3-chloropropyl) aniline contained in the reaction solution at the end of the addition reaction was 0.2% (HPLC area%). When the chemical purity of the obtained epoxy compound was measured by the method mentioned above using HPLC, it was 95% (HPLC area%). The dimer detected at an elution time of 53 to 57 minutes was 2.4% (HPLC area%), the epoxy equivalent was 162 g / eq, and the viscosity measured at 40 ° C. using an E-type viscometer was 0.31 Pa.・ It was s.

(Comparative Example 3)
Into a four-necked flask equipped with a thermometer, dropping funnel, condenser and stirrer, 209.7 g of epichlorohydrin (6.0 mol times / 4-phenoxyaniline) and 17.7 g of ion-exchanged water (0.25) Weight times / 4-phenoxyaniline) and 70.49 g (0.38 mol) of 4-phenoxyaniline were charged. The addition reaction was carried out by raising the temperature to 80 ° C. and aging with stirring for 6 hours to produce 4-phenoxy-N, N-bis (2-hydroxy-3-chloropropyl) aniline. The amount of phenoxy-N- (2-hydroxy-3-chloropropyl) aniline contained in the reaction solution at the end of the addition reaction was 0.2% (HPLC area%). To the resulting addition reaction solution, 3.92 g of tetrabutylammonium hydrogen sulfate (0.03 mol times / 4-phenoxyaniline) was added, followed by 96.6 g of 48% sodium hydroxide (3.0 mol times / 4- Phenoxyaniline) was added dropwise at a temperature of 30 ° C. over 30 minutes, and further aged at 30 ° C. with stirring for 4 hours to carry out a cyclization reaction.

After completion of the cyclization reaction, washing was performed with 115.7 g of ion exchanged water, and further 115.1 g of ion exchanged water was added to the organic layer for washing. Epichlorohydrin was removed from the organic layer under reduced pressure to obtain 112.4 g of 4-phenoxy-N, N-diglycidylaniline (weight yield (based on 4-phenoxyaniline): 99.3%). It was 94% (HPLC area%) when it measured by the method mentioned above using HPLC. The dimer detected at an elution time of 53 to 57 minutes was 3.2% (HPLC area%), the epoxy equivalent was 165 g / eq, and the viscosity measured at 40 ° C. using an E viscometer was 0.32 Pa. -It was s (40 degreeC).

(Comparative Example 4)
In Comparative Example 3, an experiment was performed in the same manner as Comparative Example 3 except that ion-exchanged water was not added in the addition reaction step and the reaction time was changed from 6 hours to 9 hours. As a result, 111.7 g of a brown viscous liquid mainly composed of 4-phenoxy-N, N-diglycidylaniline was obtained (weight yield (based on 4-phenoxyaniline): 98.4%). Phenoxy-N- (2-hydroxy-3-chloropropyl) aniline was not detected in the reaction solution at the end of the addition reaction. When the chemical purity of this epoxy compound was measured by the method mentioned above using HPLC, it was 93% (HPLC area%). The dimer detected at an elution time of 53 to 57 minutes was 4.6% (HPLC area%), the epoxy equivalent was 168 g / eq, and the viscosity measured at 40 ° C. using an E-type viscometer was 0.37 Pa.・ It was s.

(Comparative Example 5)
In a four-necked flask equipped with a thermometer, dropping funnel, condenser and stirrer, 212.7 g of epichlorohydrin (6.0 mol times / 4-phenoxyaniline) and 17.6 g of 2-propanol (0.25) were added. (Weight times / 4-phenoxyaniline) and 70.4 g (0.38 mol) of 4-phenoxyaniline were charged. The addition reaction was carried out by raising the temperature to 40 ° C. and aging with stirring for 12 hours to produce 4-phenoxy-N, N-bis (2-hydroxy-3-chloropropyl) aniline. The amount of phenoxy-N- (2-hydroxy-3-chloropropyl) aniline contained in the reaction mixture at the end of the addition reaction was 15.8% (HPLC area%). Subsequently, 3.87 g of tetrabutylammonium hydrogen sulfate (0.03 mol times / 4-phenoxyaniline) was added, and then 97.0 g of a 48% sodium hydroxide aqueous solution (3.0 mol times / 4-phenoxyaniline) was added. The solution was added dropwise over 1 hour, and further aged with stirring for 4 hours to carry out a cyclization reaction.

After completion of the cyclization reaction, washing was performed with 112.1 g of water, and further, 112.3 g of water was added to the organic layer for washing. Epichlorohydrin was removed from the organic layer under reduced pressure to obtain 100.2 g of 4-phenoxy-N, N-diglycidylaniline (weight yield (based on 4-phenoxyaniline): 88.6%). When the chemical purity of the epoxy compound was measured by the method described above using HPLC, it was 83% (HPLC area%). The dimer detected at an elution time of 53 to 57 minutes was 0.9% (HPLC area%), the epoxy equivalent was 185 g / eq, and the viscosity measured at 40 ° C. using an E viscometer was 0.28 Pa.・ It was s.

Table 1 shows a list of experimental conditions and quality of Examples and Comparative Examples.

Claims

The following general formula (1)

A phenoxyaniline represented by the following formula and epichlorohydrin are reacted at 0 to 60 ° C. in the presence of a compound selected from phenols, organic acids, inorganic acids and water:

The manufacturing method of the glycidylamine type epoxy compound shown by these.
The chemical purity of the glycidylamine-based epoxy compound represented by the general formula (2) is 95% or more, and the viscosity at 40 ° C measured using an E-type viscometer is 0.30 Pa · s or less. A method for producing a glycidylamine-based epoxy compound according to 1.
The method for producing a glycidylamine epoxy compound according to claim 1 or 2, wherein the compound selected from phenols, organic acids, inorganic acids and water is used in an amount of 0.01 to 20 times by weight with respect to the phenoxyaniline.