JP2016180046A - Two-pack type epoxy resin composition for correcting balance - Google Patents

Two-pack type epoxy resin composition for correcting balance Download PDF

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JP2016180046A
JP2016180046A JP2015060722A JP2015060722A JP2016180046A JP 2016180046 A JP2016180046 A JP 2016180046A JP 2015060722 A JP2015060722 A JP 2015060722A JP 2015060722 A JP2015060722 A JP 2015060722A JP 2016180046 A JP2016180046 A JP 2016180046A
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powder
agent
epoxy resin
resin composition
metal powder
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JP6418999B2 (en
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恒成 矢嶌
Tsunenari Yajima
恒成 矢嶌
井上 豊
Yutaka Inoue
豊 井上
哲志 ▲高▼田
哲志 ▲高▼田
Tetsushi Takada
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Somar Corp
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Somar Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a two-pack type epoxy resin composition which is excellent in workability and storage stability, and can correct balance with a reduced volume.SOLUTION: A two-pack type epoxy resin composition for correcting a balance which is made of an A agent made of an epoxy resin and metal powder (a) and a B agent made of an amine-based curing agent to the epoxy resin and metal powder (b) contains copper powder or bronze powder as metal powder (a), and bronze powder and iron powder as metal powder (b).SELECTED DRAWING: None

Description

本発明は、バランス修正用二液型エポキシ樹脂組成物、好適には回転体に用いられるバランス修正用二液型エポキシ樹脂組成物、特に好適には電動機の回転子に用いられるバランス修正用二液型エポキシ樹脂組成物に関する。   The present invention relates to a two-pack type epoxy resin composition for balance correction, preferably a two-pack type epoxy resin composition for balance correction used for a rotating body, particularly preferably two-pack type for balance correction used for a rotor of an electric motor. Type epoxy resin composition.

電動機の回転子に用いられるバランス修正用樹脂組成物(以下、バランスパテともいう。)として、液状エポキシ樹脂、硬化剤及び比重調整剤からなる樹脂組成物が知られている。特にバランスパテを付着させる場所が小さい回転子に使用する場合には、バランスパテの比重を高くする必要があり、バランスパテの比重を調整する目的で、金属粉や金属酸化物等を用いる必要がある。   As a resin composition for balance correction (hereinafter also referred to as balance putty) used for a rotor of an electric motor, a resin composition comprising a liquid epoxy resin, a curing agent, and a specific gravity adjusting agent is known. In particular, when used on a rotor where the place where the balance putty is attached is small, it is necessary to increase the specific gravity of the balance putty, and it is necessary to use metal powder or metal oxide for the purpose of adjusting the specific gravity of the balance putty. is there.

特許文献1には、液状エポキシ樹脂及び金属ビスマス及び/又はビスマス化合物からなるA剤と、アミン系硬化剤及び金属ビスマス及び/又はビスマス化合物からなるB剤とからなる常温硬化型エポキシ樹脂組成物が記載されている。これは、アミン系硬化剤を用いることにより接着性が良く、また、二液型とすることで使用期限を長くすることができるものである。しかし、特許文献1で用いられているビスマスは、レアメタルの1つであり、資源偏在性が高く、入手困難性が高い、採掘と精錬のコストが高いなどの理由から、使用量削減が望まれている。そのため、金属粉としてビスマス粉の代わりに、入手が容易で安価な鉄粉を使用することが考えられる。   Patent Document 1 discloses a room temperature curable epoxy resin composition comprising an A agent composed of a liquid epoxy resin and metal bismuth and / or a bismuth compound, and an B agent composed of an amine-based curing agent and metal bismuth and / or a bismuth compound. Have been described. This is because adhesiveness is good by using an amine curing agent, and the expiration date can be extended by using a two-component type. However, bismuth used in Patent Document 1 is one of the rare metals, and it is highly desirable to reduce the amount of use due to high resource uneven distribution, high availability, and high mining and refining costs. ing. Therefore, it is conceivable to use iron powder that is easily available and inexpensive instead of bismuth powder as metal powder.

特開2003−055536号公報JP 2003-055536 A

しかし、金属粉として鉄粉を使用した場合には、鉄粉自体の比重が軽いことからバランスパテの比重も軽くなり、バランスをとるために多くの重量を必要とする場合にはかなりの体積が必要となり、少ない体積でしか付着できない用途においては使用できない。
このため、鉄粉よりも比重の高い銅粉を金属粉として用いることが考えられる。
しかしながら、銅粉のみを金属粉として用いた場合、アミン系硬化剤を含有するB剤のべたつきが大きくなり、バランスパテの作業性が悪化する。
B剤の金属粉として銅粉に鉄粉をブレンドしていくことで、このB剤のべたつきは解消できるものの、保管中にB剤がだんだんと固くなってしまい、B剤の保存安定性に問題が生じることが判明した。
However, when iron powder is used as the metal powder, the specific gravity of the balance putty is also light because the specific gravity of the iron powder itself is light, and if a large amount of weight is required to balance, a considerable volume is required. It is necessary and cannot be used in applications where only a small volume can be adhered.
For this reason, it is possible to use copper powder with higher specific gravity than iron powder as metal powder.
However, when only copper powder is used as the metal powder, the stickiness of the B agent containing the amine curing agent is increased, and the workability of the balance putty is deteriorated.
By blending iron powder with copper powder as metal powder of agent B, the stickiness of agent B can be eliminated, but agent B becomes harder and harder during storage. Was found to occur.

そこで本発明は、少ない体積であっても十分な重さが得られるとともに、硬化剤を含有するB剤のべたつきによる作業性の悪化がなく、保存安定性にも優れるバランス修正用二液型エポキシ樹脂組成物を提供することを目的とする。   Therefore, the present invention is a two-component epoxy for balance correction that can obtain a sufficient weight even in a small volume, is not deteriorated in workability due to stickiness of the B agent containing a curing agent, and is excellent in storage stability. It aims at providing a resin composition.

本発明者らは、前記課題を解決すべく鋭意研究を重ねた結果、バランス修正用二液型エポキシ樹脂組成物の硬化剤を含有するB剤の金属粉として、ブロンズ粉及び鉄粉を用いることにより上記課題を解決できることを見出し、本発明を完成するに至った。   As a result of intensive studies to solve the above problems, the present inventors use bronze powder and iron powder as the metal powder of the B agent containing the curing agent of the two-pack type epoxy resin composition for balance correction. Thus, the inventors have found that the above problems can be solved, and have completed the present invention.

即ち、本発明は以下のバランス修正用二液型エポキシ樹脂組成物を提供するものである。   That is, the present invention provides the following two-pack type epoxy resin composition for balance correction.

(1)エポキシ樹脂及び金属粉(a)からなるA剤と、前記エポキシ樹脂に対するアミン系硬化剤及び金属粉(b)からなるB剤、からなるバランス修正用二液型エポキシ樹脂組成物であって、前記金属粉(b)としてブロンズ粉及び鉄粉を含むことを特徴とするバランス修正用二液型エポキシ樹脂組成物。   (1) A two-pack type epoxy resin composition for balance correction comprising an agent A composed of an epoxy resin and a metal powder (a) and an agent B for the epoxy resin and an amine curing agent and a metal powder (b). A two-pack type epoxy resin composition for balance correction, comprising bronze powder and iron powder as the metal powder (b).

(2)前記金属粉(a)として銅粉又はブロンズ粉を含有する(1)に記載のバランス修正用二液型エポキシ樹脂組成物。   (2) The two-pack type epoxy resin composition for balance correction according to (1), which contains copper powder or bronze powder as the metal powder (a).

本発明のエポキシ樹脂組成物は、各種分野で用いられている電動機回転子のバランス修正用樹脂組成物として、べたつきによる作業性の悪化が無く、保存安定性に優れ、また、少ない体積でバランス修正ができる。また、電動機回転子のバランス修正以外にも、他の物品の重さ調整にも使用することができる。   The epoxy resin composition of the present invention is a resin composition for correcting the balance of motor rotors used in various fields, has no deterioration in workability due to stickiness, has excellent storage stability, and corrects balance with a small volume. Can do. In addition to correcting the balance of the motor rotor, it can also be used to adjust the weight of other articles.

次に、本発明を実施するための形態を説明するが、本発明はこれらの例によってなんら限定されるものではない。   Next, although the form for implementing this invention is demonstrated, this invention is not limited at all by these examples.

本発明のエポキシ樹脂組成物(以下、単に組成物ともいう)は、二液型のもので、A剤とB剤とからなる。本発明のエポキシ樹脂組成物はA剤にエポキシ樹脂及び金属粉(a)を含有し、B剤にアミン系硬化剤及び金属粉(b)を含有し、前記金属粉(b)としてブロンズ粉及び鉄粉を含有することを特徴とする。
以下に、本発明のエポキシ樹脂組成物の詳細について説明する。
The epoxy resin composition of the present invention (hereinafter also simply referred to as a composition) is a two-component type and comprises an A agent and a B agent. The epoxy resin composition of the present invention contains an epoxy resin and a metal powder (a) in the A agent, an amine-based curing agent and a metal powder (b) in the B agent, and bronze powder and the metal powder (b). It contains iron powder.
Below, the detail of the epoxy resin composition of this invention is demonstrated.

まず、A剤について説明する。
本発明に用いるエポキシ樹脂は、常温で液状を示すエポキシ樹脂であることが好ましい。このようなものには、例えば、ビスフェノールA型エポキシ樹脂、水添ビスフェノールA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F型エポキシ樹脂、カルボン酸グリシジルエステル型エポキシ樹脂、フェノールノボラック型エポキシ樹脂、ウレタン変性ビスフェノールA型エポキシ樹脂等が挙げられる。これらのエポキシ樹脂は単独又は2種以上を混合して使用してもよい。また、これらの液状エポキシ樹脂には、常温で固体状ないし半固体状のエポキシ樹脂を適量添加することもできる。
First, the agent A will be described.
The epoxy resin used in the present invention is preferably an epoxy resin that is liquid at room temperature. For example, bisphenol A type epoxy resin, hydrogenated bisphenol A type epoxy resin, bisphenol AD type epoxy resin, bisphenol F type epoxy resin, carboxylic acid glycidyl ester type epoxy resin, phenol novolac type epoxy resin, urethane Examples thereof include modified bisphenol A type epoxy resins. These epoxy resins may be used alone or in combination of two or more. In addition, an appropriate amount of a solid or semi-solid epoxy resin at room temperature can be added to these liquid epoxy resins.

本発明のA剤で用いる金属粉(a)は、従来公知のものを用いることができる。このようなものとしては、例えば、銅粉、鉄粉、ブロンズ粉、銀粉、アルミニウム粉、タングステン粉、亜鉛粉、ニッケル粉、コバルト粉、ビスマス粉等が挙げられ、目的の比重やコスト等を考慮し選択することができる。これらの金属粉は単独又は2種以上を混合して使用してもよい。
金属粉(a)の平均粒径は、用途及びコストを考慮して適宜選択する。平均粒径の下限として1nm以上が好ましく、1μm以上がより好ましく、10μm以上が更に好ましい。平均粒径の上限として100μm以下が好ましく、80μm以下がより好ましく、50μm以下が更に好ましい。
A conventionally well-known thing can be used for the metal powder (a) used with A agent of this invention. Examples of such materials include copper powder, iron powder, bronze powder, silver powder, aluminum powder, tungsten powder, zinc powder, nickel powder, cobalt powder, and bismuth powder. Can be selected. These metal powders may be used alone or in combination of two or more.
The average particle diameter of the metal powder (a) is appropriately selected in consideration of the use and cost. The lower limit of the average particle diameter is preferably 1 nm or more, more preferably 1 μm or more, and even more preferably 10 μm or more. The upper limit of the average particle diameter is preferably 100 μm or less, more preferably 80 μm or less, and even more preferably 50 μm or less.

本発明のA剤で用いる金属粉(a)は、上記のものが使用できるが、比重が高く、入手が容易で安価であることから、銅粉又はブロンズ粉であることがより好ましい。
このような銅粉としては、還元銅粉、アトマイズ銅粉、電解銅粉等が挙げられ、いずれも好適に使用できる。
また、ブロンズ粉のブロンズとは、銅と錫の合金であり、青銅とも呼ばれるものである。ブロンズには、この他、亜鉛、鉛、鉄、リン等が含まれていてもよい。
本発明において、ブロンズ中の銅の含有率は65〜96質量%のものが好ましい。
The above-mentioned metal powder (a) used in the agent A of the present invention can be used, but it is more preferably copper powder or bronze powder because it has high specific gravity, is easily available, and is inexpensive.
Examples of such copper powder include reduced copper powder, atomized copper powder, and electrolytic copper powder, and any of them can be used suitably.
Bronze of bronze powder is an alloy of copper and tin, and is also called bronze. In addition to this, the bronze may contain zinc, lead, iron, phosphorus and the like.
In the present invention, the copper content in the bronze is preferably 65 to 96% by mass.

本発明のA剤において、金属粉(a)の配合量は所望する組成物の比重に応じて適宜選択するが、A剤の全量に対し、下限として70質量%以上が好ましく、80質量%以上がより好ましく、上限として95質量%以下が好ましく、90質量%以下がより好ましい。   In the agent A of the present invention, the blending amount of the metal powder (a) is appropriately selected according to the specific gravity of the desired composition, but the lower limit is preferably 70% by mass or more and 80% by mass or more with respect to the total amount of the agent A. The upper limit is preferably 95% by mass or less, and more preferably 90% by mass or less.

次に、B剤について説明する。
本発明で用いる硬化剤は、アミン系硬化剤であればよく、従来公知のものを用いることができる。このようなものには、例えば、脂肪族アミン、ポリエーテルアミン、脂環式アミン、芳香族アミン、ポリアミド等が挙げられる。これらのアミン系硬化剤は単独又は2種以上を混合して使用してもよい。
Next, B agent is demonstrated.
The curing agent used in the present invention may be an amine-based curing agent, and conventionally known ones can be used. Such things include, for example, aliphatic amines, polyether amines, alicyclic amines, aromatic amines, polyamides and the like. These amine curing agents may be used alone or in combination of two or more.

本発明のB剤で用いる金属粉(b)は、ブロンズ粉及び鉄粉を含むものである。
このようなブロンズ粉としては、上記A剤と同様のものが使用できる。
また、鉄粉としては、還元鉄粉、アトマイズ鉄粉、電解鉄粉、カーボニル鉄粉等が挙げられ、いずれも好適に使用できる。
The metal powder (b) used in the B agent of the present invention contains bronze powder and iron powder.
As such bronze powder, those similar to the above-mentioned agent A can be used.
Examples of the iron powder include reduced iron powder, atomized iron powder, electrolytic iron powder, carbonyl iron powder, and the like, and any of them can be suitably used.

このようなブロンズ粉及び鉄粉の平均粒径は、用途及びコストを考慮して適宜選択する。平均粒径の下限として1nm以上が好ましく、1μm以上がより好ましく、10μm以上が更に好ましい。上限として100μm以下が好ましく、80μm以下がより好ましく、50 μm以下が更に好ましい。   The average particle size of such bronze powder and iron powder is appropriately selected in consideration of use and cost. The lower limit of the average particle diameter is preferably 1 nm or more, more preferably 1 μm or more, and even more preferably 10 μm or more. The upper limit is preferably 100 μm or less, more preferably 80 μm or less, and even more preferably 50 μm or less.

本発明のB剤において、金属粉(b)、すなわちブロンズ粉と鉄粉の合計の配合量は、所望する組成物の比重に応じて適宜選択するが、B剤の全量に対し、通常、下限として65質量%以上が好ましく、70質量%以上がより好ましく、上限として95質量%以下が好ましく、90質量%以下がより好ましい割合である。そのブロンズ粉と鉄粉の配合量が前記下限以上とすることにより、より高比重の組成物を得ることができる。一方、前記上限値以下とすることにより、組成物が適度な軟らかさになり塗布性が良く、対象物、例えば回転子ヨークに対して良好に付着するので好ましい。   In the B agent of the present invention, the total amount of the metal powder (b), that is, the bronze powder and the iron powder, is appropriately selected according to the specific gravity of the desired composition, but is usually lower than the total amount of the B agent. 65 mass% or more is preferable, 70 mass% or more is more preferable, 95 mass% or less is preferable as an upper limit, and 90 mass% or less is a more preferable ratio. By setting the blending amount of the bronze powder and iron powder to be equal to or higher than the lower limit, a composition having a higher specific gravity can be obtained. On the other hand, it is preferable that the amount is not more than the above upper limit value because the composition becomes moderately soft and has good coatability and adheres well to an object such as a rotor yoke.

また、金属粉(b)における鉄粉の配合量は、所望する組成物の比重に応じて適宜選択するが、ブロンズ粉と鉄粉の合計量に対し、下限として20質量%以上が好ましく、25質量%以上がより好ましく、上限として55質量%以下が好ましく、50質量%以下がより好ましい。   The amount of iron powder in the metal powder (b) is appropriately selected according to the specific gravity of the desired composition, but is preferably 20% by mass or more as the lower limit with respect to the total amount of bronze powder and iron powder. More preferably, the upper limit is 55% by mass or less, and more preferably 50% by mass or less.

本発明のエポキシ樹脂組成物の比重は、前記したA剤の比重及びB剤の比重、A剤とB剤の配合比により調整する。
所望の比重が得られるように、A剤は上述した金属粉(a)の配合量、B剤はブロンズ粉と鉄粉の配合量により、比重の調整を行なう。
B剤で用いるブロンズ粉は比重 7.97〜8.94の物質であり、鉄粉は比重7.87の物質であり、より高比重なブロンズ粉の配合量を上記の範囲内で増やすことにより、高比重域の組成物とすることができる。
The specific gravity of the epoxy resin composition of the present invention is adjusted by the specific gravity of the above-mentioned agent A, the specific gravity of agent B, and the blending ratio of agent A and agent B.
In order to obtain a desired specific gravity, the specific gravity is adjusted by the blending amount of the above-described metal powder (a) for agent A and the blending amount of bronze powder and iron powder for agent B.
The bronze powder used in the B agent is a substance with a specific gravity of 7.97 to 8.94, the iron powder is a substance with a specific gravity of 7.87, and the blending amount of the higher specific gravity bronze powder is increased within the above range. A composition having a high specific gravity range can be obtained.

本発明のエポキシ樹脂組成物には、本発明の目的を成しうる範囲で、必要に応じてその他の各種添加剤を添加することができる。前記添加剤としては、充填剤、着色剤、難燃剤、密着向上剤、衝撃緩和剤、沈降防止剤、減粘剤等が挙げられる。   Various other additives can be added to the epoxy resin composition of the present invention as necessary within a range that can achieve the object of the present invention. Examples of the additive include a filler, a colorant, a flame retardant, an adhesion improver, an impact modifier, an anti-settling agent, and a viscosity reducer.

本発明のエポキシ樹脂組成物は、A剤として、エポキシ樹脂、金属粉(a)、必要に応じて、上述したその他の添加剤を所定量添加して、ミキサー等を用いて混合することにより調整する。
また、B剤として、アミン系硬化剤、ブロンズ粉及び鉄粉、必要に応じて、上述したその他の添加剤を所定量添加して、ミキサー等を用いて混合することにより調整する。
バランス修正等、使用の際にA剤とB剤を混合して用いる。
The epoxy resin composition of the present invention is prepared by adding a predetermined amount of the epoxy resin, metal powder (a), and other additives described above as necessary, and mixing them using a mixer or the like as the A agent. To do.
Further, as the agent B, an amine-based curing agent, bronze powder and iron powder, and if necessary, other additives described above are added in a predetermined amount and mixed by using a mixer or the like.
Mix A and B during use, such as for balance correction.

以下の実施例により本発明をさらに詳細に説明するが、本発明はこれら実施例によって限定されるものではない。   The following examples further illustrate the present invention in detail but are not to be construed to limit the scope thereof.

〈エポキシ樹脂組成物の構成成分〉
(1)エポキシ樹脂A:ビスフェノールA型エポキシ樹脂(エポキシ当量:184〜194、商品名jER828、三菱化学社製)
(2)エポキシ樹脂B:ビスフェノールA型エポキシ樹脂(エポキシ当量:230〜270、商品名jER834、三菱化学社製)
(3)ブロンズ粉:比重 8.8、200メッシュパス
(4)銅粉:比重 9.0、350メッシュパス
(5)鉄粉:比重 7.9、325メッシュパス
(6)充填剤:硫酸バリウム、比重 4.3、平均粒径 0.6μm
(7)沈降防止剤:微細シリカ、比重 2.2、平均粒径 7nm
(8)着色剤:カーボンブラック、325メッシュパス
(9)アミン系硬化剤A:ポリアミド(アミン価:425、商品名 トーマイド296、T&K TOKA社製)
(10)アミン系硬化剤B:ポリアミド(アミン価:430、 商品名 トーマイドTXE−445 T&K TOKA社製)
(11)アミン系硬化剤C:ポリアミド(アミン価:540、商品名 トーマイドTXA−415−A、T&K TOKA社製)
(12)アミン系硬化剤D:ポリアミド(アミン価:380、商品名 アンカマイド350A、 エアープロダクツジャパン株式会社製)
(13)アミン系硬化剤E:脂環式アミン(アミン価:410、商品名 アンカミン2706、エアープロダクツ社製)
(14)着色剤:ベンガラ(商品名 トダカラー335R、戸田工業社製)
<Constituent components of epoxy resin composition>
(1) Epoxy resin A: bisphenol A type epoxy resin (epoxy equivalent: 184-194, trade name: jER828, manufactured by Mitsubishi Chemical Corporation)
(2) Epoxy resin B: bisphenol A type epoxy resin (epoxy equivalent: 230-270, trade name jER834, manufactured by Mitsubishi Chemical Corporation)
(3) Bronze powder: specific gravity 8.8, 200 mesh pass (4) Copper powder: specific gravity 9.0, 350 mesh pass (5) Iron powder: specific gravity 7.9, 325 mesh pass (6) Filler: barium sulfate , Specific gravity 4.3, average particle size 0.6μm
(7) Anti-settling agent: fine silica, specific gravity 2.2, average particle size 7 nm
(8) Colorant: Carbon black, 325 mesh pass (9) Amine-based curing agent A: Polyamide (Amine number: 425, trade name: Tomide 296, manufactured by T & K TOKA)
(10) Amine-based curing agent B: polyamide (amine value: 430, trade name: Tomide TXE-445 manufactured by T & K TOKA)
(11) Amine-based curing agent C: polyamide (amine value: 540, trade name: Tomide TXA-415-A, manufactured by T & K TOKA)
(12) Amine-based curing agent D: polyamide (amine value: 380, trade name: Ancamide 350A, manufactured by Air Products Japan Co., Ltd.)
(13) Amine-based curing agent E: cycloaliphatic amine (amine value: 410, trade name Ancamine 2706, manufactured by Air Products)
(14) Colorant: Bengala (trade name Toda Color 335R, manufactured by Toda Kogyo Co., Ltd.)

(実施例1〜8、比較例1〜8)
表1及び表2に示す配合比(質量部)でエポキシ樹脂、金属粉、各種添加剤をミキサーで均一に混合することによりA剤を調整した。表1及び表2に示す配合比(質量部)で硬化剤、金属粉、各種添加剤をミキサーで均一に混合することによりB剤を調整した。
(Examples 1-8, Comparative Examples 1-8)
The agent A was prepared by uniformly mixing the epoxy resin, metal powder, and various additives with a mixer at the mixing ratio (parts by mass) shown in Tables 1 and 2. B agent was prepared by mixing a hardening | curing agent, metal powder, and various additives uniformly with a mixer with the compounding ratio (mass part) shown in Table 1 and Table 2.

(評価)
実施例及び比較例について、B剤の保存安定性、A剤及びB剤の混合物のべたつき及び硬さを評価した結果を表1及び表2に示す。
なお、それぞれの評価は以下のとおり行った。
(Evaluation)
Tables 1 and 2 show the results of evaluating the storage stability of the B agent, the stickiness of the mixture of the A agent and the B agent, and the hardness of the examples and comparative examples.
Each evaluation was performed as follows.

(B剤の保存安定性の評価)
調整したB剤を25℃で40日間保存した後に手で触って、混合した直後の硬さと比較し、以下の基準により保存安定性を評価した。
○:25℃で40日間保存した後の硬さが混合した直後の硬さとほぼ同じもの。
×:25℃で40日間保存した後の硬さが混合した直後より硬くなっているもの。
(Evaluation of storage stability of B agent)
The prepared B agent was stored at 25 ° C. for 40 days and then touched by hand, compared with the hardness immediately after mixing, and the storage stability was evaluated according to the following criteria.
○: Hardness after storage for 40 days at 25 ° C. is almost the same as the hardness immediately after mixing.
X: The hardness after storing for 40 days at 25 ° C. is harder than immediately after mixing.

(べたつき及び硬さの評価)
調整したA剤及びB剤を、質量比100/100の割合で混合し、得られた組成物について、べたつきと硬さを手で触って評価した。尚、べたつきと硬さは下記の評価基準に従って評価した。
(Evaluation of stickiness and hardness)
The prepared agent A and agent B were mixed at a mass ratio of 100/100, and the obtained composition was evaluated by touching the stickiness and hardness with a hand. The stickiness and hardness were evaluated according to the following evaluation criteria.

〈べたつき〉
◎:ほとんどべたつかない(合格)
○:べたつきは少ない(合格)
×:ややべたつく(不合格)
−:B剤が粉状のため混合できない(不合格)
〈硬さ〉
◎:やや軟らかい(合格)
○:普通(合格)
×:やや硬い(不合格)
−:B剤が粉状のため混合できない(不合格)
<Stickiness>
A: Almost non-sticky (passed)
○: Little stickiness (pass)
×: Slightly sticky (failed)
-: B agent is powdery and cannot be mixed (failed)
<Hardness>
A: Slightly soft (pass)
○: Normal (pass)
X: Slightly hard (failed)
-: B agent is powdery and cannot be mixed (failed)

表1に示すように、実施例1〜8は、A剤の金属粉(a)としてブロンズ粉又は銅粉、B剤の金属粉(b)としてブロンズ粉及び鉄粉を使用したものであり、いずれにおいても混合物のべたつき及び硬さ、B剤の保存安定性が優れていた。
表2に示すように、比較例1のB剤は、金属粉(b)として鉄粉のみを使用し、比重が4.6となる配合であるが、ミキサーで撹拌してもパテ状にならず、粉状であった。このことから、鉄粉だけでは金属粉の比重が軽いため、高比重の組成物はできないことがわかる。
B剤の金属粉(b)として銅粉のみを使用した比較例2、3は、A剤とB剤の混合物の硬さは良好であったが、べたつきがあり、B剤の保存安定性も悪いものだった。
比較例5〜8はB剤の金属粉(b)として銅粉及び鉄粉を加えたものであり、いずれにおいてもべたつきは改善した。しかし、B剤の保存安定性は悪い結果であった。
B剤の金属粉(b)としてブロンズ粉のみを使用した比較例4は、B剤の保存安定性は改善したが、混合物のべたつきがあった。
以上の結果より、本発明の樹脂組成物はA剤にエポキシ樹脂と金属粉(a)、B剤にアミン系硬化剤並びに金属粉(b)としてブロンズ粉及び鉄粉を配合することにより、パテの作業性(べたつきや硬さ)が良好で、保存安定性に優れることがわかる。
As shown in Table 1, Examples 1-8 use bronze powder or copper powder as metal powder (a) of agent A, and use bronze powder and iron powder as metal powder (b) of agent B. In any case, the stickiness and hardness of the mixture and the storage stability of the B agent were excellent.
As shown in Table 2, the agent B of Comparative Example 1 uses only iron powder as the metal powder (b) and has a specific gravity of 4.6. It was powdery. From this, it can be seen that a composition having a high specific gravity cannot be made with iron powder alone because the specific gravity of the metal powder is light.
In Comparative Examples 2 and 3 using only copper powder as the metal powder (b) of agent B, the hardness of the mixture of agent A and agent B was good, but there was stickiness, and the storage stability of agent B was also good. It was bad.
In Comparative Examples 5 to 8, copper powder and iron powder were added as the metal powder (b) of the B agent, and the stickiness was improved in all cases. However, the storage stability of B agent was a bad result.
In Comparative Example 4 in which only the bronze powder was used as the metal powder (b) of the B agent, the storage stability of the B agent was improved, but the mixture was sticky.
From the above results, the resin composition of the present invention was obtained by blending epoxy resin and metal powder (a) into agent A, amine-based curing agent and agent powder Bronze powder and iron powder as agent B. It can be seen that the workability (stickiness and hardness) is excellent and the storage stability is excellent.

Claims (2)

エポキシ樹脂及び金属粉(a)からなるA剤と、前記エポキシ樹脂に対するアミン系硬化剤及び金属粉(b)からなるB剤、からなるバランス修正用二液型エポキシ樹脂組成物であって、前記金属粉(b)としてブロンズ粉及び鉄粉を含むことを特徴とするバランス修正用二液型エポキシ樹脂組成物。   A two-pack type epoxy resin composition for balance correction, comprising an A agent comprising an epoxy resin and a metal powder (a), and an B-agent comprising an amine-based curing agent and the metal powder (b) for the epoxy resin, A two-pack type epoxy resin composition for balance correction, comprising bronze powder and iron powder as metal powder (b). 前記金属粉(a)として銅粉又はブロンズ粉を含有する請求項1に記載のバランス修正用二液型エポキシ樹脂組成物。   The two-pack type epoxy resin composition for balance correction according to claim 1, comprising copper powder or bronze powder as the metal powder (a).
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116536011A (en) * 2023-03-18 2023-08-04 嘉兴市韶华塑胶新材料股份有限公司 High-specific gravity epoxy balance daub and preparation method thereof

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JPH03107646A (en) * 1989-09-19 1991-05-08 Sumitomo Bakelite Co Ltd Balancing material for rotary electric element
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JPH0931307A (en) * 1995-07-25 1997-02-04 Matsushita Electric Ind Co Ltd Thermosetting paste composition
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Publication number Priority date Publication date Assignee Title
JPS6392639A (en) * 1986-10-07 1988-04-23 Asmo Co Ltd One-pack, heat-curable epoxy resin composition for use in correcting balance of rotor of motor
JPH03107646A (en) * 1989-09-19 1991-05-08 Sumitomo Bakelite Co Ltd Balancing material for rotary electric element
JPH06141511A (en) * 1992-10-22 1994-05-20 Three Bond Co Ltd Resin composition for motor balancing
JPH0931307A (en) * 1995-07-25 1997-02-04 Matsushita Electric Ind Co Ltd Thermosetting paste composition
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116536011A (en) * 2023-03-18 2023-08-04 嘉兴市韶华塑胶新材料股份有限公司 High-specific gravity epoxy balance daub and preparation method thereof

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