JP6964428B2 - Epoxy resin adhesive - Google Patents

Epoxy resin adhesive Download PDF

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JP6964428B2
JP6964428B2 JP2017073051A JP2017073051A JP6964428B2 JP 6964428 B2 JP6964428 B2 JP 6964428B2 JP 2017073051 A JP2017073051 A JP 2017073051A JP 2017073051 A JP2017073051 A JP 2017073051A JP 6964428 B2 JP6964428 B2 JP 6964428B2
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epoxy resin
component
resin adhesive
curing agent
equivalent
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JP2018172604A (en
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真奈美 大長
哲志 ▲高▼田
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Somar Corp
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Somar Corp
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Priority to TW107104895A priority patent/TWI775810B/en
Priority to CN201810155295.8A priority patent/CN108690543A/en
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    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J163/00Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/02Non-macromolecular additives
    • C09J11/06Non-macromolecular additives organic
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09JADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J11/00Features of adhesives not provided for in group C09J9/00, e.g. additives
    • C09J11/08Macromolecular additives
    • CCHEMISTRY; METALLURGY
    • C08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08LCOMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2205/00Polymer mixtures characterised by other features
    • C08L2205/02Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
    • C08L2205/025Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure

Description

本発明は、モーター類のマグネットを固定するのに好適なエポキシ樹脂接着剤に関する。 The present invention relates to an epoxy resin adhesive suitable for fixing magnets of motors.

エポキシ樹脂とアミン硬化剤からなる2液型エポキシ樹脂組成物は、常温硬化性、接着性、耐久性、機械特性等に優れているという点から、種々の用途に用いられている。 The two-component epoxy resin composition composed of an epoxy resin and an amine curing agent is used for various purposes because it is excellent in room temperature curability, adhesiveness, durability, mechanical properties and the like.

具体的には、モーター類のマグネット固定用エポキシ樹脂接着剤等として、使用されている。低粘度のエポキシ樹脂接着剤をマグネットとモーターヨークの微細間隙に流動性よく浸透させ、接着する。マグネットとモーターヨークを接着する際の硬化方法は、消費電力とCO排出量の削減に貢献する方法が求められており、常温硬化型のエポキシ樹脂接着剤が好ましい。 Specifically, it is used as an epoxy resin adhesive for fixing magnets in motors. A low-viscosity epoxy resin adhesive is permeated into the fine gaps between the magnet and the motor yoke with good fluidity and adhered. As a curing method for adhering the magnet and the motor yoke, a method that contributes to reduction of power consumption and CO 2 emissions is required, and a room temperature curing type epoxy resin adhesive is preferable.

このようなエポキシ樹脂接着剤としては、ビスフェノールF型エポキシ樹脂、ポリアミドアミン、非反応性希釈剤であるテトラヒドロフルフリルアルコールを含有したエポキシ樹脂接着剤(特許文献1)やビスフェノール型エポキシ樹脂、ポリアミドアミン、反応性希釈剤である1、6−ヘキサンジオールジグルシジルエーテルを含有したエポキシ樹脂接着剤(特許文献2)が開示されている。 Examples of such an epoxy resin adhesive include an epoxy resin adhesive containing a bisphenol F type epoxy resin, a polyamide amine, and a non-reactive diluent tetrahydrofurfuryl alcohol (Patent Document 1), a bisphenol type epoxy resin, and a polyamide amine. , An epoxy resin adhesive containing a reactive diluent 1,6-hexanediol diglycidyl ether (Patent Document 2) is disclosed.

しかし、エポキシ樹脂、ポリアミドアミン、非反応性又は反応性希釈剤の3成分を単純に組み合せた特許文献1や特許文献2では、可とう性が不十分であり、ヒートサイクル性に問題があった。モーターは、使用される周辺環境温度や通電時の自己発熱などにより急激な温度変化を受ける。これを、ヒートサイクルという。ヒートサイクルの繰り返し作用により、熱収縮、熱膨張を繰り返すとエポキシ樹脂接着剤の硬化物に歪みが蓄積し、クラック等の塗膜破壊が発生する。 However, Patent Document 1 and Patent Document 2 in which the three components of an epoxy resin, a polyamide amine, and a non-reactive or reactive diluent are simply combined have insufficient flexibility and have a problem in heat cycle property. .. The motor is subject to sudden temperature changes due to the ambient temperature used and self-heating when energized. This is called a heat cycle. When heat shrinkage and heat expansion are repeated due to the repeated action of the heat cycle, strain accumulates in the cured product of the epoxy resin adhesive, and coating film destruction such as cracks occurs.

そこで、可とう性を改善した特許文献3が用いられている。特許文献3には、ビスフェノールA型エポキシ樹脂、可とう性硬化剤であるポリアミン系硬化剤、非反応性希釈剤であるベンジルアルコールを含有したエポキシ樹脂接着剤が開示されている。しかし、単純に可とう性材料を用いただけの特許文献3では、常温硬化性が不十分という新たな問題が生じている。可とう性と常温硬化性の両立は、非常に困難であった。 Therefore, Patent Document 3 having improved flexibility is used. Patent Document 3 discloses an epoxy resin adhesive containing a bisphenol A type epoxy resin, a polyamine-based curing agent which is a flexible curing agent, and benzyl alcohol which is a non-reactive diluent. However, Patent Document 3 in which a flexible material is simply used causes a new problem that the room temperature curability is insufficient. It was very difficult to achieve both flexibility and room temperature curability.

また、作業性や生産性向上の観点から、特許文献1〜3ではポットライフが不十分で、ポットライフを、更に延ばすことが望まれている。 Further, from the viewpoint of improving workability and productivity, the pot life is insufficient in Patent Documents 1 to 3, and it is desired to further extend the pot life.

特開昭63−280216号JP-A-63-280216 特開2011−068814号Japanese Unexamined Patent Publication No. 2011-068814 特開2015−093948号JP 2015-093948

そこで、本発明は、低粘度であり、常温硬化性、可とう性、ポットライフに優れるエポキシ樹脂接着剤を提供することを課題とする。 Therefore, it is an object of the present invention to provide an epoxy resin adhesive which has a low viscosity and is excellent in room temperature curability, flexibility, and pot life.

本発明者らは、エポキシ樹脂、特定のポリアミド系硬化剤、ベンジルアルコールを含有することにより前記課題を解決できることを見出し、本発明を完成させた。 The present inventors have found that the above problems can be solved by containing an epoxy resin, a specific polyamide-based curing agent, and benzyl alcohol, and have completed the present invention.

すなわち、本発明のエポキシ樹脂接着剤は、(A)エポキシ樹脂、(B)活性水素当量145〜225g/eqのポリアミド系硬化剤、(C)ベンジルアルコールを配合することを特徴とするエポキシ樹脂接着剤である。 That is, the epoxy resin adhesive of the present invention is characterized by blending (A) an epoxy resin, (B) a polyamide-based curing agent having an active hydrogen equivalent of 145 to 225 g / eq, and (C) a benzyl alcohol. It is an agent.

本発明により、低粘度であり、常温硬化性、可とう性、ポットライフに優れるエポキシ樹脂接着剤を得ることができる。 According to the present invention, it is possible to obtain an epoxy resin adhesive having a low viscosity and excellent room temperature curability, flexibility, and pot life.

以下、本発明の実施の最良の形態について説明するが、本発明は以下の実施の形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲で、当業者の通常の知識に基づいて、以下の実施の形態に対し、適宜変更、改良等が加えられたものも本発明の範囲のものである。 Hereinafter, the best embodiment of the present invention will be described, but the present invention is not limited to the following embodiments, and is based on ordinary knowledge of those skilled in the art without departing from the spirit of the present invention. It is also within the scope of the present invention that the following embodiments have been appropriately modified, improved, or the like.

本発明のエポキシ樹脂接着剤は、(A)エポキシ樹脂、(B)活性水素当量145〜225g/eqのポリアミド系硬化剤、(C)ベンジルアルコールを含有することを特徴とする。 The epoxy resin adhesive of the present invention is characterized by containing (A) an epoxy resin, (B) a polyamide-based curing agent having an active hydrogen equivalent of 145 to 225 g / eq, and (C) a benzyl alcohol.

以下に、本発明の接着剤の詳細について説明する。 The details of the adhesive of the present invention will be described below.

本発明において用いられる前記(A)成分としては、従来から知られているエポキシ樹脂をその使用目的に応じて適宜使用することができる。具体例としては、ビスフェノールA型エポキシ樹脂、ビスフェノールF型エポキシ樹脂、ビスフェノールAD型エポキシ樹脂、ビスフェノールS型エポキシ樹脂、フェノールノボラック型エポキシ樹脂、クレゾールノボラック型エポキシ樹脂、ポリエーテル型エポキシ樹脂などのグリシジルエーテル型エポキシ樹脂、ヘキサヒドロフタル酸グリシジルエステル、ダイマー酸グリシジルエステルなどのグリシジルエステル型エポキシ樹脂、p−アミノフェノール型エポキシ樹脂、トリグリシジルイソシアヌレート、テトラグリシジルジアミノジフェニルメタンなどのグリシジルアミン型エポキシ樹脂、臭素化ビスフェノールA型エポキシ樹脂、水素化ビスフェノールA型エポキシ樹脂、ビフェニル骨格を有するエポキシ樹脂、ナフタレン骨格を有するエポキシ樹脂、脂環式エポキシ樹脂などを挙げることが出来る。これらは単独で用いてもよく、また2種以上を併用してもよい。
本発明の(A)成分のエポキシ当量は、150〜220g/eqが好ましい。エポキシ当量を150g/eq以上とすることで、より優れた可とう性を付与 することができ、220g/eq以下とすることで、より優れた常温硬化性を付与することができる。
As the component (A) used in the present invention, a conventionally known epoxy resin can be appropriately used depending on the purpose of use thereof. Specific examples include glycidyl ethers such as bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol AD type epoxy resin, bisphenol S type epoxy resin, phenol novolac type epoxy resin, cresol novolac type epoxy resin, and polyether type epoxy resin. Type epoxy resin, glycidyl ester type epoxy resin such as hexahydrophthalic acid glycidyl ester, dimer acid glycidyl ester, p-aminophenol type epoxy resin, triglycidyl isocyanurate, glycidylamine type epoxy resin such as tetraglycidyl diaminodiphenylmethane, brominated Examples thereof include a bisphenol A type epoxy resin, a hydride bisphenol A type epoxy resin, an epoxy resin having a biphenyl skeleton, an epoxy resin having a naphthalene skeleton, and an alicyclic epoxy resin. These may be used alone or in combination of two or more.
The epoxy equivalent of the component (A) of the present invention is preferably 150 to 220 g / eq. When the epoxy equivalent is 150 g / eq or more, more excellent flexibility can be imparted, and when it is 220 g / eq or less, more excellent room temperature curability can be imparted.

本発明において用いられる(B)成分としては、活性水素当量145〜225のポリアミド系硬化剤を使用する。(B)成分は、2種類以上組み合わせて使用してもよい。また、効果を損なわない範囲で、他の硬化剤を併用してもよい。
(B)成分の活性水素当量 を145g/eq以上とすることで、可とう性と良好なポットライフを与える ことができ、225g/eq以下とすることで、常温硬化性を付与することができる。
As the component (B) used in the present invention, a polyamide-based curing agent having an active hydrogen equivalent of 145 to 225 is used. The component (B) may be used in combination of two or more types. Further, other curing agents may be used in combination as long as the effect is not impaired.
By setting the active hydrogen equivalent of the component (B) to 145 g / eq or more, flexibility and good pot life can be provided, and by setting it to 225 g / eq or less, room temperature curability can be imparted. ..

本発明において用いられる(C)成分としては、ベンジルアルコールを使用する。効果を損なわない範囲で、他の希釈剤を併用してもよい。
(C)成分は、主剤若しくは硬化剤液のいずれか又は主剤及び硬化剤液の双方に添加することができる。
(C)成分の配合割合は、(A)成分100質量部当り、5〜17質量部配合することが好ましい。(A)成分の配合量を5質量部以上とすることでより低粘度かつより優れたポットライフを得ることができ、17質量部以下とすることでより優れた接着性が得られるためである。
(B)成分と(C)成分を併用することで、(C)成分は(B)成分に対して硬化促進剤として機能し、常温硬化性を付与することができる。また、ポットライフを著しく延長することができる。
Benzyl alcohol is used as the component (C) used in the present invention. Other diluents may be used in combination as long as the effect is not impaired.
The component (C) can be added to either the main agent or the curing agent liquid or both the main agent and the curing agent liquid.
The mixing ratio of the component (C) is preferably 5 to 17 parts by mass per 100 parts by mass of the component (A). This is because a lower viscosity and a better pot life can be obtained by setting the blending amount of the component (A) to 5 parts by mass or more, and a better adhesiveness can be obtained by setting the blending amount to 17 parts by mass or less. ..
By using the component (B) and the component (C) in combination, the component (C) functions as a curing accelerator with respect to the component (B) and can impart normal temperature curability. In addition, the pot life can be significantly extended.

本発明のエポキシ樹脂接着剤には、効果を損なわない範囲で、難燃剤、着色剤、充填剤、レベリング剤、垂れ止め剤、カップリング剤、消泡剤、離型剤、流動性調整剤等の慣用の補助成分を適宜配合することができる。 The epoxy resin adhesive of the present invention includes flame retardants, colorants, fillers, leveling agents, anti-dripping agents, coupling agents, defoaming agents, mold release agents, fluidity adjusting agents, etc., as long as the effects are not impaired. Conventional auxiliary ingredients can be appropriately blended.

以下、本発明のエポキシ樹脂接着剤、これを硬化させた硬化物について実施例を用いて具体的に説明するが、本発明のエポキシ樹脂接着剤、硬化物についてはこれらの実施例によって限定されるものではない。
なお、実施例及び比較例のエポキシ樹脂接着剤については、粘度、常温硬化性、ポットライフの評価を行ない、硬化物については可とう性及び引張せん断接着強さの評価を行なった。
実施例中、特に記載がない場合には、「部」は質量部を示す。
Hereinafter, the epoxy resin adhesive of the present invention and the cured product obtained by curing the epoxy resin adhesive will be specifically described with reference to Examples, but the epoxy resin adhesive and the cured product of the present invention are limited by these Examples. It's not a thing.
The epoxy resin adhesives of Examples and Comparative Examples were evaluated for viscosity, room temperature curability, and pot life, and the cured products were evaluated for flexibility and tensile shear adhesive strength.
In the examples, unless otherwise specified, "parts" indicates parts by mass.

(粘度の評価)
E型粘度計(東機産業社製、商品名「TVE−35H」、コーンプレート:直径28mm、角度3°)を使用し、温度25℃にて、ロータ回転数を任意に設定し、装置を始動させ2分後に針が示した目盛値に規定の換算乗数を乗じて粘度を算出した。
なお、粘度の評価基準は以下のとおりである。
○: 4Pa・s未満
△: 4Pa・s以上5Pa・s未満
×: 5Pa・s以上
(Evaluation of viscosity)
Using an E-type viscometer (manufactured by Toki Sangyo Co., Ltd., trade name "TVE-35H", cone plate: diameter 28 mm, angle 3 °), set the rotor rotation speed arbitrarily at a temperature of 25 ° C, and set the device. Two minutes after the start, the viscosity was calculated by multiplying the scale value indicated by the needle by the specified conversion multiplier.
The evaluation criteria for viscosity are as follows.
◯: Less than 4 Pa · s Δ: 4 Pa · s or more and less than 5 Pa · s ×: 5 Pa · s or more

(常温硬化性の評価)
ゲル化時間を常温硬化性の指標とした。常温硬化性については、ゲル化時間を測定することにより、以下の基準で評価した。
試料約0.4gを100℃に保持した熱板の円形凹部に入れ、かきまぜ棒でかきまぜ、糸がひかなくなるまでの時間、すなわちゲル化に至るまでの時間(秒)を測定した。JIS C 2161に準じて評価した。
なお、常温硬化性の評価基準は以下のとおりである。
○:ゲル化時間が400秒未満
×:ゲル化時間が400秒以上
(Evaluation of room temperature curability)
The gelation time was used as an index of normal temperature curability. The room temperature curability was evaluated according to the following criteria by measuring the gelation time.
Approximately 0.4 g of the sample was placed in a circular recess of a hot plate held at 100 ° C., stirred with a stirring rod, and the time until the threads did not pull, that is, the time (seconds) until gelation was measured. Evaluation was made according to JIS C 2161.
The evaluation criteria for room temperature curability are as follows.
◯: Gelation time is less than 400 seconds ×: Gelation time is 400 seconds or more

(ポットライフの評価)
試料100gを密閉容器にいれ、室温25℃で放置し、5分ごとにE型粘度計で25℃における組成物の粘度を測定し、10Pa・sになるまでの時間をもとめた。その結果を以下の基準で評価した。
なお、ポットライフの評価基準は以下のとおりである。
○:35分以上
△:30分以上35分未満
×:30分未満
(Evaluation of pot life)
100 g of the sample was placed in a closed container, left at room temperature of 25 ° C., and the viscosity of the composition at 25 ° C. was measured every 5 minutes with an E-type viscometer to determine the time until it reached 10 Pa · s. The results were evaluated according to the following criteria.
The evaluation criteria for pot life are as follows.
◯: 35 minutes or more Δ: 30 minutes or more and less than 35 minutes ×: less than 30 minutes

(可とう性の評価)
試料を直径50mmで高さ4mmの円柱状の離型処理が施された容器に入れ、80℃で2時間加熱硬化させたものを取り出し、試験片とした。この試験片の硬度をショアー硬度計(D型)を用いて、JIS K 7215に準じて評価した。
なお、可とう性の評価基準は以下のとおりである。
○:66 未満
△:66以上80未満
×:80以上
(Evaluation of flexibility)
The sample was placed in a columnar mold release treatment container having a diameter of 50 mm and a height of 4 mm, and the sample was heat-cured at 80 ° C. for 2 hours and taken out as a test piece. The hardness of this test piece was evaluated using a shore hardness tester (D type) according to JIS K 7215.
The evaluation criteria for flexibility are as follows.
◯: Less than 66 Δ: 66 or more and less than 80 ×: 80 or more

(引張せん断接着強さの評価)
まず、100mm×25mm×1.6mmのSPCC−SD鋼板を#240研磨布で研磨したのち、脱脂した。次に、実施例により製造したエポキシ樹脂接着剤を、12.5mmになるように上記の脱脂後のSPCC−SD鋼板に塗布し、その上に同様の処理をしたSPCC−SD鋼板を圧着した。続いて、80℃で2時間の条件で加熱して混合組成物を熱硬化させ、常温に至るまで放置して測定試料を得た。25℃の雰囲気中、荷重速度5mm/minの条件下、得られた測定試料の引張せん断接着強さを測定し、測定試料5個の測定値の平均値を、測定対象の硬化物の引張せん断接着強さとした。JIS K 6850:1999(ISO 4587:1995)に準じて評価した。
(Evaluation of tensile shear adhesive strength)
First, a 100 mm × 25 mm × 1.6 mm SPCC-SD steel sheet was polished with a # 240 polishing cloth and then degreased. Next, the epoxy resin adhesive produced according to the examples was applied to the above-mentioned degreased SPCC-SD steel sheet so as to have a thickness of 12.5 mm, and the SPCC-SD steel sheet subjected to the same treatment was pressure-bonded thereto. Subsequently, the mixed composition was heat-cured by heating at 80 ° C. for 2 hours, and left to stand until room temperature to obtain a measurement sample. The tensile shear adhesion strength of the obtained measurement sample was measured under the condition of a load speed of 5 mm / min in an atmosphere of 25 ° C., and the average value of the measured values of the five measurement samples was calculated as the tensile shear of the cured product to be measured. Adhesive strength. The evaluation was made according to JIS K 6850: 1999 (ISO 4587: 1995).

(実施例1)
表1に示す質量比で、活性水素当量が190g/eqとなるように(B)成分として、(B1)ポリアミド系硬化剤(アンカマイド910、活性水素当量:230g/eq、エアープロダクツジャパン社製)及び(B2)ポリアミド系硬化剤(アンカマイド2050、活性水素当量:150g/eq、エアープロダクツジャパン社製)を混合し、更に(C)成分として、(C1)ベンジルアルコール(ベンジルアルコール、東京応化工業社製)を加えたものをヘラで混合することにより硬化剤液を調整した。表1に示す質量比で(A)成分として、(A1)ビスフェノールA型エポキシ樹脂(jER828、エポキシ当量:187g/eq、三菱化学社製)成分と硬化剤液をヘラで混合してエポキシ樹脂接着剤を調製した。
上記に示す方法で、粘度、常温硬化性、ポットライフ、可とう性、引張せん断接着強さを評価した結果を表1に示す。
(Example 1)
As a component (B), a (B1) polyamide-based curing agent (anncamide 910, active hydrogen equivalent: 230 g / eq, manufactured by Air Products Japan Co., Ltd.) so that the active hydrogen equivalent is 190 g / eq in the mass ratio shown in Table 1. And (B2) polyamide-based curing agent (ancamide 2050, active hydrogen equivalent: 150 g / eq, manufactured by Air Products Japan Co., Ltd.) are mixed, and (C1) benzyl alcohol (benzyl alcohol, Tokyo Ohka Kogyo Co., Ltd.) is further mixed as a component (C). The curing agent solution was prepared by mixing the mixture with the addition of (manufactured by) with a spatula. As the component (A) in the mass ratio shown in Table 1, the component (A1) bisphenol A type epoxy resin (jER828, epoxy equivalent: 187 g / eq, manufactured by Mitsubishi Chemical Corporation) and the curing agent solution are mixed with a spatula and bonded to the epoxy resin. The agent was prepared.
Table 1 shows the results of evaluating the viscosity, room temperature curability, pot life, flexibility, and tensile shear adhesive strength by the methods shown above.

Figure 0006964428
Figure 0006964428

(実施例2)
(B)成分として、活性水素当量が155g/eqとなるよう、表1に示す質量比で(B1)成分及び(B2)成分を混合し、(A)成分と(B)成分の当量比を1.0とするため、(B)成分を80質量部とした以外は実施例1と同様にしてエポキシ樹脂接着剤を得た。このものの評価を表1に示す。
(Example 2)
As the component (B), the component (B1) and the component (B2) are mixed at the mass ratio shown in Table 1 so that the active hydrogen equivalent is 155 g / eq, and the equivalent ratio of the component (A) and the component (B) is adjusted. In order to make it 1.0, an epoxy resin adhesive was obtained in the same manner as in Example 1 except that the component (B) was 80 parts by mass. The evaluation of this product is shown in Table 1.

(実施例3)
(B)成分として、活性水素当量が213g/eqとなるよう、表1に示す質量比で(B1)成分及び(B2)成分を混合し、(A)成分と(B)成分の当量比を1.0とするため、(B)成分を110質量部とした以外は実施例1と同様にしてエポキシ樹脂接着剤を得た。このものの評価を表1に示す。
(Example 3)
As the component (B), the component (B1) and the component (B2) are mixed at the mass ratio shown in Table 1 so that the active hydrogen equivalent is 213 g / eq, and the equivalent ratio of the component (A) and the component (B) is adjusted. In order to set it to 1.0, an epoxy resin adhesive was obtained in the same manner as in Example 1 except that the component (B) was 110 parts by mass. The evaluation of this product is shown in Table 1.

(比較例1)
(B)成分以外の硬化剤として、活性水素当量が137g/eqとなるよう、表1に示す質量比で(B2)成分及び(B3)ポリアミド系硬化剤(アンカマイド2353、活性水素当量:114g/eq、エアープロダクツジャパン社製)を混合し、(A)成分と硬化剤の当量比を1.0とするため、(B)成分以外の硬化剤を70質量部とした以外は実施例1と同様にしてエポキシ樹脂接着剤を得た。このものの評価を表1に示す。
(Comparative Example 1)
As a curing agent other than the component (B), the component (B2) and the polyamide-based curing agent (ancamide 2353, active hydrogen equivalent: 114 g /) in the mass ratio shown in Table 1 so that the active hydrogen equivalent is 137 g / eq. Since eq and (manufactured by Air Products Japan Co., Ltd.) are mixed and the equivalent ratio of the component (A) and the curing agent is 1.0, the curing agent other than the component (B) is set to 70 parts by mass, as in Example 1. An epoxy resin adhesive was obtained in the same manner. The evaluation of this product is shown in Table 1.

(比較例2)
(B)成分以外の硬化剤として、活性水素当量が230g/eqの(B1)成分のみを用い、(A)成分と硬化剤の当量比を1.0とするため、硬化剤を120質量部とした以外は実施例1と同様にしてエポキシ樹脂接着剤を得た。このものの評価を表1に示す。
(Comparative Example 2)
As the curing agent other than the component (B), only the component (B1) having an active hydrogen equivalent of 230 g / eq is used, and the equivalent ratio of the component (A) to the curing agent is 1.0, so that the curing agent is 120 parts by mass. An epoxy resin adhesive was obtained in the same manner as in Example 1 except that. The evaluation of this product is shown in Table 1.

(比較例3)
(B)成分に変えて、ポリアミド系硬化剤以外の硬化剤を、活性水素当量が186g/eqとなるよう、表1に示す質量比で(B4)ポリエーテルアミン系硬化剤(ジェファーミン D−400、活性水素当量:114g/eq、HUNTSUMAN社製)及び(B5)ポリエーテルアミン系硬化剤(ジェファーミン D−2000、活性水素当量:500g/eq、HUNTSUMAN社製)を混合した以外は実施例1と同様にしてエポキシ樹脂接着剤を得た。このものの評価を表1に示す。
(Comparative Example 3)
Instead of the component (B), a curing agent other than the polyamide-based curing agent was used as the (B4) polyetheramine-based curing agent (Jeffamine D-) in the mass ratio shown in Table 1 so that the active hydrogen equivalent was 186 g / eq. Examples except that 400, active hydrogen equivalent: 114 g / eq, manufactured by HUNTSUMAN) and (B5) polyether amine-based curing agent (Jeffamine D-2000, active hydrogen equivalent: 500 g / eq, manufactured by HUNTSUMAN) were mixed. An epoxy resin adhesive was obtained in the same manner as in 1. The evaluation of this product is shown in Table 1.

(比較例4)
(C)成分に変えて、ベンジルアルコール以外の非反応性希釈剤の(C2)芳香族炭化水素樹脂(ネシレスEPX−L、NEVCIN社製)を12質量部とした以外は実施例1と同様にしてエポキシ樹脂接着剤を得た。このものの評価を表1に示す。
(Comparative Example 4)
Same as in Example 1 except that the component (C) was changed to 12 parts by mass of the (C2) aromatic hydrocarbon resin (Neciles EPX-L, manufactured by NEVCIN), which is a non-reactive diluent other than benzyl alcohol. Obtained an epoxy resin adhesive. The evaluation of this product is shown in Table 1.

(比較例5)
(C)成分に変えて、反応性希釈剤の(C3)ブチルグリシジルエーテル(エピオール B、エポキシ当量:130g/eq、日油社製)を12質量部とした。表1に示す質量比で(A)成分として(A1)成分及び(C3)成分をヘラで混合し、主剤を調整した。次に、表1に示す質量比で、活性水素当量が190g/eqとなるように(B)成分として、(B1)成分及び(B2)成分をヘラで混合し、硬化剤液を調整した。主剤の(A)成分及び(C)成分以外の希釈剤と硬化剤の(B)成分の当量比を1.0とするため、(B)成分を120質量部とし、主剤と硬化剤液をヘラで混合してエポキシ樹脂接着剤を調製した。このものの評価を表1に示す。
(Comparative Example 5)
Instead of the component (C), the reactive diluent (C3) butyl glycidyl ether (Epiol B, epoxy equivalent: 130 g / eq, manufactured by NOF CORPORATION) was used in an amount of 12 parts by mass. The components (A1) and (C3) were mixed with a spatula as the component (A) at the mass ratio shown in Table 1 to prepare the main agent. Next, the components (B1) and (B2) were mixed with a spatula as the component (B) so that the active hydrogen equivalent was 190 g / eq at the mass ratio shown in Table 1, and the curing agent solution was prepared. In order to set the equivalent ratio of the diluents other than the components (A) and (C) of the main agent to the component (B) of the curing agent to 1.0, the component (B) is set to 120 parts by mass, and the main agent and the curing agent liquid are used. An epoxy resin adhesive was prepared by mixing with a spatula. The evaluation of this product is shown in Table 1.

(実施例4)
(A)成分として、エポキシ当量が145g/eqとなるよう、表2に示す質量比で(A1)成分及び(A2)p−アミノフェノール型エポキシ樹脂(jER630、エポキシ当量:98g/eq、三菱化学社製)を混合し、(A)成分と(B)成分の当量比を1.0とするため、(B)成分を130質量部とした以外は実施例1と同様にしてエポキシ樹脂接着剤を得た。このものの評価を表2に示す。
(Example 4)
As the component (A), the component (A1) and the (A2) p-aminophenol type epoxy resin (jER630, epoxy equivalent: 98 g / eq, Mitsubishi Chemical) in the mass ratio shown in Table 2 so that the epoxy equivalent is 145 g / eq. In order to make the equivalent ratio of the component (A) and the component (B) 1.0 by mixing the components (A) and the component (B), the epoxy resin adhesive is the same as in Example 1 except that the component (B) is 130 parts by mass. Got The evaluation of this product is shown in Table 2.

Figure 0006964428
Figure 0006964428

(実施例5)
(A)成分として、(A1)成分に変えて、エポキシ当量が170g/eqの(A3)ビスフェノールF型エポキシ樹脂(jER807、エポキシ当量:170g/eq、三菱化学社製)とし、(A)成分と(B)成分の当量比を1.0とするため、(B)成分を110質量部とした以外は実施例1と同様にしてエポキシ樹脂接着剤を得た。このものの評価を表2に示す。
(Example 5)
As the component (A), instead of the component (A1), a (A3) bisphenol F type epoxy resin (jER807, epoxy equivalent: 170 g / eq, manufactured by Mitsubishi Chemical Corporation) having an epoxy equivalent of 170 g / eq was used, and the component (A) was used. In order to set the equivalent ratio of the component (B) to 1.0, an epoxy resin adhesive was obtained in the same manner as in Example 1 except that the component (B) was 110 parts by mass. The evaluation of this product is shown in Table 2.

(実施例6)
(A)成分として、エポキシ当量が192g/eqとなるよう、表2に示す質量比で(A1)成分及び(A4)ビスフェノールA型エポキシ樹脂(jER834、エポキシ当量:250g/eq、三菱化学社製)を混合した以外は実施例1と同様にしてエポキシ樹脂接着剤を得た。このものの評価を表2に示す。
(Example 6)
As the component (A), the component (A1) and the (A4) bisphenol A type epoxy resin (jER834, epoxy equivalent: 250 g / eq, manufactured by Mitsubishi Chemical Corporation) in the mass ratio shown in Table 2 so that the epoxy equivalent is 192 g / eq. ) Was mixed, and an epoxy resin adhesive was obtained in the same manner as in Example 1. The evaluation of this product is shown in Table 2.

(実施例7)
(A)成分として、エポキシ当量が214g/eqとなるよう、表2に示す質量比で(A1)成分及び(A5)ポリエーテル型エポキシ樹脂(アデカレジン EP−4005、エポキシ当量:512g/eq、ADEKA社製)を混合し、(A)成分と(B)成分の当量比を1.0とするため、(B)成分を90質量部とした以外は実施例1と同様にしてエポキシ樹脂接着剤を得た。このものの評価を表2に示す。
(Example 7)
As the component (A), the component (A1) and the (A5) polyether type epoxy resin (Adecaledin EP-4005, epoxy equivalent: 512 g / eq, ADEKA) in the mass ratio shown in Table 2 so that the epoxy equivalent is 214 g / eq. In order to make the equivalent ratio of the component (A) and the component (B) 1.0 by mixing the components (A) and the component (B), the epoxy resin adhesive is the same as in Example 1 except that the component (B) is 90 parts by mass. Got The evaluation of this product is shown in Table 2.

(実施例8)
(A)成分として、エポキシ当量が231g/eqとなるよう、表2に示す質量比で(A1)成分及び(A5)成分を混合し、(A)成分と(B)成分の当量比を1.0とするため、(B)成分を80質量部とした以外は実施例1と同様にしてエポキシ樹脂接着剤を得た。このものの評価を表2に示す。
(Example 8)
As the component (A), the component (A1) and the component (A5) are mixed at the mass ratio shown in Table 2 so that the epoxy equivalent is 231 g / eq, and the equivalent ratio of the component (A) and the component (B) is set to 1. An epoxy resin adhesive was obtained in the same manner as in Example 1 except that the component (B) was 80 parts by mass in order to set the ratio to 0.0. The evaluation of this product is shown in Table 2.

(実施例9)
(C)成分として、(C1)成分を3質量部とした以外は実施例1と同様にしてエポキシ樹脂接着剤を得た。このものの評価を表3に示す。
(Example 9)
An epoxy resin adhesive was obtained in the same manner as in Example 1 except that the component (C1) was 3 parts by mass. The evaluation of this product is shown in Table 3.

Figure 0006964428
Figure 0006964428

(実施例10)
(C)成分として、(C1)成分を6質量部とした以外は実施例1と同様にしてエポキシ樹脂接着剤を得た。このものの評価を表3に示す。
(Example 10)
An epoxy resin adhesive was obtained in the same manner as in Example 1 except that the component (C1) was 6 parts by mass. The evaluation of this product is shown in Table 3.

(実施例11)
(C)成分として、(C1)成分を15質量部とした以外は実施例1と同様にしてエポキシ樹脂接着剤を得た。このものの評価を表3に示す。
(Example 11)
An epoxy resin adhesive was obtained in the same manner as in Example 1 except that the component (C1) was 15 parts by mass. The evaluation of this product is shown in Table 3.

(実施例12)
(C)成分として、(C1)成分を20質量部とした以外は実施例1と同様にしてエポキシ樹脂接着剤を得た。このものの評価を表3に示す。
(Example 12)
An epoxy resin adhesive was obtained in the same manner as in Example 1 except that the component (C1) was 20 parts by mass. The evaluation of this product is shown in Table 3.

実施例1〜3、比較例1、2より、(A)エポキシ樹脂、(B)活性水素当量145〜225g/eqのポリアミド系硬化剤、(C)ベンジルアルコールを併用することにより、従来技術では達成し得なかった課題を解決し、低粘度であり、常温硬化性、可とう性、ポットライフに優れたエポキシ樹脂接着剤を得られることが分かる。 From Examples 1 to 3 and Comparative Examples 1 and 2, by using (A) an epoxy resin, (B) a polyamide-based curing agent having an active hydrogen equivalent of 145 to 225 g / eq, and (C) benzyl alcohol in combination, in the prior art. It can be seen that the problems that could not be achieved can be solved, and an epoxy resin adhesive having a low viscosity and excellent room temperature curability, flexibility, and pot life can be obtained.

更に、実施例1及び比較例1〜5より、(B)活性水素当量145〜225g/eqのポリアミド系硬化剤と(C)ベンジルアルコールを併用することで、優れた常温硬化性及びポットライフが得られることが分かる。 Further, from Example 1 and Comparative Examples 1 to 5, excellent room temperature curability and pot life can be obtained by using (B) a polyamide-based curing agent having an active hydrogen equivalent of 145 to 225 g / eq and (C) benzyl alcohol in combination. It turns out that it can be obtained.

また、実施例1、4〜8より、(A)エポキシ樹脂のエポキシ当量を150〜220g/eqの範囲とすることで、可とう性及び常温硬化性により優れたエポキシ樹脂接着剤を得られることが分かる。 Further, from Examples 1, 4 to 8, by setting the epoxy equivalent of the epoxy resin (A) in the range of 150 to 220 g / eq, an epoxy resin adhesive having better flexibility and room temperature curability can be obtained. I understand.

また、実施例1、9〜12より、(A)エポキシ樹脂100質量部当り、(C)ベンジルアルコールを5〜17質量部とすることで、粘度、ポットライフ及び引張せん断接着強さに、より優れたエポキシ樹脂接着剤が得られることが分かる。 Further, from Examples 1 and 9 to 12, by setting the amount of (C) benzyl alcohol to 5 to 17 parts by mass per 100 parts by mass of (A) epoxy resin, the viscosity, pot life and tensile shear adhesive strength can be improved. It can be seen that an excellent epoxy resin adhesive can be obtained.

Claims (1)

(A)エポキシ樹脂、(B)活性水素当量145〜225g/eqのポリアミド系硬化剤、(C)ベンジルアルコールを必須成分とするエポキシ樹脂接着剤。 An epoxy resin adhesive containing (A) an epoxy resin, (B) a polyamide-based curing agent having an active hydrogen equivalent of 145 to 225 g / eq, and (C) a benzyl alcohol as essential components.
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