JPH0341089B2 - - Google Patents

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Publication number
JPH0341089B2
JPH0341089B2 JP61141279A JP14127986A JPH0341089B2 JP H0341089 B2 JPH0341089 B2 JP H0341089B2 JP 61141279 A JP61141279 A JP 61141279A JP 14127986 A JP14127986 A JP 14127986A JP H0341089 B2 JPH0341089 B2 JP H0341089B2
Authority
JP
Japan
Prior art keywords
epoxy resin
curing
rotating body
resin composition
balance
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP61141279A
Other languages
Japanese (ja)
Other versions
JPS63311A (en
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Priority to JP14127986A priority Critical patent/JPS63311A/en
Publication of JPS63311A publication Critical patent/JPS63311A/en
Publication of JPH0341089B2 publication Critical patent/JPH0341089B2/ja
Granted legal-status Critical Current

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  • Compositions Of Macromolecular Compounds (AREA)
  • Epoxy Resins (AREA)
  • Manufacture Of Motors, Generators (AREA)

Description

【発明の詳細な説明】[Detailed description of the invention]

〔産業上の利用分野〕 本発明は、回転電機用回転子の回転体における
回転時のアンバランスを是正する、いわゆるバラ
ンス取りするために用いられる液状エポキシ樹脂
組成物に関するものである。 〔従来技術〕 回転電機用回転子の回転体は大きい直径を有す
るため、バランスが完全にとれていないと回転時
に振動が発生する。従来ではバランスをとるため
に回転体外径を切削する方法が多くの場合とられ
ていた。しかし、この方法では回転時騒音を発生
するため、パテ、鉛を貼り付けたりビスを埋込む
こと等にてバランスを取る方法も取られている。
従来用いられてきたパテ状の樹脂では非常に高粘
度であるため、手作業でバランス修正が行なわれ
てきた。 〔発明の目的〕 本発明は、回転電機用回転子の回転体に液状樹
脂を付着硬化させ、バランスを取る方法に用いる
液状エポキシ樹脂に関するものであり、自動吐出
機を用いて自動化できる樹脂組成物を提供するも
のである。 即ち、本発明者らは、従来高粘度パテ状で自動
機による吐出ができなかつたバランス用樹脂に代
わる速硬化、低粘度でかつタレ落ちが生じず保存
安定性の優れた樹脂組成物を得んとして研究した
結果、エポキシ樹脂、潜在性硬化剤、無機充填材
を成分とする系にて潜在性硬化剤、チキソ付与剤
等の検討を行ない、保存性がよく室温で6ケ月以
上のポツトライフを有しており、しかも低粘度、
高チキソ性かつ速硬化であるため、硬化時にタレ
落ちがなく自動機による吐出が可能な一液性の液
状エポキシ樹脂組成物を提供するに至つたもので
ある。 〔発明の構成〕 本発明は、回転電機用回転子の回転体における
回転時のアンバランスを是正するために用いられ
るエポキシ樹脂組成物において、エポキシ樹脂、
硬化剤、硬化促進剤、無機充填材及びチキソ付与
剤を主成分とし、硬化剤はジシアンジアミド又は
有機二塩基酸ジヒドラジドであつて、エポキシ樹
脂100重量部に対しジシアンジアミド1〜10重量
部または有機二塩基酸ジヒドラジド1〜40重量部
を含有し、チキソ付与剤は有機ベントナイトであ
ることを特徴とする一液性液状エポキシ樹脂組成
物である。 本組成物に用いられるエポキシ樹脂は室温で液
状であることが必須の条件であり、一般に用いら
れるビスフエノールA型エポキシ樹脂等が挙げら
れるが、本発明の目的とする低粘度の樹脂組成物
を得るためには、ビスフエノールA型エポキシ樹
脂より耐熱性、耐衝撃性等の物性を低下させない
低粘度のエポキシ樹脂が好ましく、ビスフエノー
ルF型エポキシ樹脂もしくはビスフエノールAD
型エポキシ樹脂等が望ましい。 硬化剤は潜在性を有するものであり、硬化前後
の重量差が大きいとバランス取りが難しいため高
温(120〜200℃)での硬化重量減少率が低いこと
が好ましい。 潜在性硬化剤として、三フツ化ホウ素−アミン
アダクト、ジシアンジアミド、二塩基酸ジヒドラ
ジド、酸無水物、アミン・イミド化合物、トリア
ジン化合物等が挙げられる。 これらの化合物中で、硬化時の重量減少率が低
く、120℃〜200℃の条件下で30分以内に硬化し得
て、室温で保存性の優れたものは、ジシアンジア
ミド及び二塩基酸ジヒドラジドに限定される。 ジシアンジアミドの添加量エポキシ樹脂100部
(重量部、以下同じ)に対して1部〜10部である。
添加量が1部より少ない場合硬化が遅くなり硬化
しにくく、10部より多い場合硬化物は脆くなる。 二塩基酸ジヒドラジドは
[Industrial Application Field] The present invention relates to a liquid epoxy resin composition used for correcting unbalance during rotation of a rotating body of a rotor for a rotating electric machine, so-called balancing. [Prior Art] Since the rotating body of a rotor for a rotating electric machine has a large diameter, vibrations will occur during rotation if it is not perfectly balanced. Conventionally, in many cases, the outer diameter of the rotating body was cut in order to maintain balance. However, since this method generates noise during rotation, methods are also taken to balance the structure by pasting putty, lead, or embedding screws.
The putty-like resin that has been used in the past has a very high viscosity, so the balance has to be corrected manually. [Object of the Invention] The present invention relates to a liquid epoxy resin used in a method of adhering and curing a liquid resin to a rotating body of a rotor for a rotating electric machine to maintain balance, and the present invention relates to a resin composition that can be automated using an automatic dispensing machine. It provides: That is, the present inventors have obtained a resin composition that cures quickly, has a low viscosity, does not sag, and has excellent storage stability in place of the conventional balancing resin, which is in the form of a high viscosity and cannot be discharged by an automatic machine. As a result of our research, we investigated latent hardeners, thixotropic agents, etc. in systems containing epoxy resin, latent hardeners, and inorganic fillers. Moreover, it has low viscosity,
The present invention has led to the provision of a one-component liquid epoxy resin composition that does not sag during curing and can be discharged by an automatic machine due to its high thixotropy and rapid curing. [Structure of the Invention] The present invention provides an epoxy resin composition used for correcting unbalance during rotation in a rotating body of a rotor for a rotating electric machine, which comprises an epoxy resin,
The main components are a curing agent, a curing accelerator, an inorganic filler, and a thixotropic agent, and the curing agent is dicyandiamide or an organic dibasic acid dihydrazide, and the curing agent is 1 to 10 parts by weight of dicyandiamide or an organic dibasic acid per 100 parts by weight of the epoxy resin. This is a one-component liquid epoxy resin composition containing 1 to 40 parts by weight of acid dihydrazide, and the thixotropic agent is organic bentonite. It is essential that the epoxy resin used in this composition be liquid at room temperature, and examples include commonly used bisphenol A type epoxy resins. In order to obtain a bisphenol A type epoxy resin, a low viscosity epoxy resin that does not deteriorate physical properties such as heat resistance and impact resistance is preferable, and a bisphenol F type epoxy resin or a bisphenol AD type epoxy resin is preferable.
A molded epoxy resin or the like is preferable. The curing agent has latent properties, and if the weight difference before and after curing is large, it is difficult to balance the curing agent, so it is preferable that the curing weight loss rate at high temperatures (120 to 200° C.) is low. Examples of the latent curing agent include boron trifluoride-amine adduct, dicyandiamide, dibasic acid dihydrazide, acid anhydride, amine/imide compound, triazine compound, and the like. Among these compounds, those that have a low weight loss rate during curing, can be cured within 30 minutes under conditions of 120°C to 200°C, and have excellent storage stability at room temperature are dicyandiamide and dibasic acid dihydrazide. Limited. The amount of dicyandiamide added is 1 part to 10 parts per 100 parts (parts by weight, same hereinafter) of the epoxy resin.
If the amount added is less than 1 part, curing will be slow and difficult, and if it is more than 10 parts, the cured product will become brittle. Dibasic acid dihydrazide is

【式】の構造式で表さ れる。Rnは次表に示されるもの等が挙げられる。Represented by the structural formula of [formula] It will be done. Examples of Rn include those shown in the table below.

〔発明の効果〕〔Effect of the invention〕

回転電機用回転子の回転体における回転時のア
ンバランスを是正するために、従来はパテ状の高
粘度物を用いて手作業で付着させていたが、本発
明の一液性液状エポキシ樹脂組成物を用いれば、
保存安定性が優れているため二液性の場合のよう
に使用時主剤・硬化剤の配合ミスをする恐れがな
く、自動吐出機により計量吐出可能となり、かつ
速硬化であるためバランス是正の自動化が可能に
なり、生産性が向上する。 本発明の一液性液状エポキシ樹脂組成物ではチ
キソ付与剤として有機ベントナイトを使用してい
るため、室温付近の増粘作用が小さいので、自動
吐出機使用時の作業性が優れており、高温時にお
いてもチキソ性が失われず加熱硬化時にタレ落ち
が生じない。 〔実施例〕 実施例及び比較例を以下に示す。 第1表に示すような配合の樹脂組成物を混合
し、特性比較を行なつた。その結果を第2表に示
す。 その結果、実施例1及び2のエポキシ樹脂組成
物は、ポツトライフ、タレ落ち性、バランス精
度、熱時強度、過熱劣化、自動吐出機適用性をす
べて満足するもので、自動機により吐出可能で速
硬化であるため自動化が可能となる。
In order to correct the unbalance during rotation of the rotor of a rotor for a rotating electrical machine, conventionally, a putty-like high viscosity substance was used to manually attach the resin, but the one-component liquid epoxy resin composition of the present invention If you use things,
Due to its excellent storage stability, there is no risk of mixing the main ingredient and curing agent when using it, as is the case with two-component products, and automatic dispensing machines allow for metered dispensing, and quick curing makes it possible to automate balance correction. becomes possible and improves productivity. Since the one-component liquid epoxy resin composition of the present invention uses organic bentonite as a thixotropic agent, its thickening effect at around room temperature is small, so it has excellent workability when using an automatic dispensing machine, and at high temperatures. The thixotropic property is not lost even in the case of heat curing, and no dripping occurs during heat curing. [Example] Examples and comparative examples are shown below. Resin compositions having the formulations shown in Table 1 were mixed and properties were compared. The results are shown in Table 2. As a result, the epoxy resin compositions of Examples 1 and 2 satisfied all of the pot life, dripping properties, balance accuracy, strength under heat, overheating deterioration, and applicability to automatic dispensing machines, and could be dispensed quickly using automatic machines. Since it is a hardening method, automation is possible.

【表】【table】

【表】【table】

【表】 試験方法(1) エポキシ樹脂配合物約200gを紙コツプにとり、
25℃恒温槽中に放置し、初期粘度から粘度が2倍
に到達した時間をポツトライフとする。 試験方法(2) エポキシ樹脂混合物を約1g、アルミカツプに
とり150℃10分加熱し、重量変化率を測定する。 試験方法(3) 回転体に樹脂を所定の位置に所定量滴下し、回
転体のバランスがうまくとれるかどうか判定す
る。 試験方法(4) 回転体を150〜200℃に1時間放置し、150〜200
℃雰囲気内において高速回転例えば6000〜
10000rpmにて1分間回転させ、バランス修正用
樹脂がヒビ割れ浮き等の外観変化の有無を観察す
る。 〇外観変化がない ×外観変化がある 試験方法(5) 回転体に電圧12〜14Vにて常温で1分間印加後
高速回転6000〜10000rpmにて1分間回転させ、
バランス修正用樹脂のヒビ割れ、浮き等の外観変
化の有無を観察する。 〇外観変化がない ×外観変化がある 試験方法(6) 自動吐出機にて樹脂組成物を吐出し、0.01gか
ら1g位の吐出精度が得られるかどうかを確認す
る。 〇吐出精度良好 ×吐出精度不良
[Table] Test method (1) Approximately 200g of the epoxy resin mixture was placed in a paper cup.
The pot life is defined as the time when the viscosity reaches twice the initial viscosity after being left in a constant temperature bath at 25°C. Test method (2) Place approximately 1 g of the epoxy resin mixture in an aluminum cup, heat at 150°C for 10 minutes, and measure the rate of weight change. Test method (3) Drop a predetermined amount of resin at a predetermined position on a rotating body and judge whether the rotating body is well balanced. Test method (4) Leave the rotating body at 150-200℃ for 1 hour,
High speed rotation in ℃ atmosphere e.g. 6000~
Rotate at 10,000 rpm for 1 minute and observe whether the balance correction resin has changed in appearance, such as cracking or floating. 〇 No change in appearance × Test method with change in appearance (5) After applying a voltage of 12 to 14 V to the rotating body for 1 minute at room temperature, rotate it at high speed of 6000 to 10000 rpm for 1 minute.
Observe whether there are any changes in the appearance of the balance correction resin, such as cracks or floating. 〇 No change in appearance × Test method with change in appearance (6) Dispense the resin composition using an automatic dispensing machine and check whether a discharge accuracy of about 0.01g to 1g can be obtained. 〇Good discharge accuracy ×Poor discharge accuracy

【特許請求の範囲】[Claims]

1 ビス(ω−ヒドロキシアルキル)テレフタレ
ートあるいはその初期縮合物をシリコンオイル中
に、アルキルメタクリレートとグリシジルメタク
リレートを共重合してなるポリマーを幹とし、ポ
リシロキサンを枝とするグラフトポリマーを分散
安定剤として、微粒子状に分散せしめ加熱重合す
ることを特徴とするポリエステルの重合方法。 2 ビス(ω−ヒドロキシアルキル)テレフタレ
ートまたはその初期縮合物の微粒子径が300μm以
下であることを特徴とする特許請求の範囲第1項
記載のポリエステルの重合方法。
1 Bis(ω-hydroxyalkyl) terephthalate or its initial condensate in silicone oil, a polymer made by copolymerizing alkyl methacrylate and glycidyl methacrylate as a trunk, and a graft polymer having polysiloxane as a branch as a dispersion stabilizer, A method for polymerizing polyester, which is characterized by dispersing it into fine particles and polymerizing it by heating. 2. The method for polymerizing polyester according to claim 1, wherein the fine particle size of bis(ω-hydroxyalkyl) terephthalate or its initial condensate is 300 μm or less.

JP14127986A 1986-06-19 1986-06-19 Liquid epoxy resin composition Granted JPS63311A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14127986A JPS63311A (en) 1986-06-19 1986-06-19 Liquid epoxy resin composition

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14127986A JPS63311A (en) 1986-06-19 1986-06-19 Liquid epoxy resin composition

Publications (2)

Publication Number Publication Date
JPS63311A JPS63311A (en) 1988-01-05
JPH0341089B2 true JPH0341089B2 (en) 1991-06-21

Family

ID=15288196

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14127986A Granted JPS63311A (en) 1986-06-19 1986-06-19 Liquid epoxy resin composition

Country Status (1)

Country Link
JP (1) JPS63311A (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0350232A3 (en) * 1988-07-04 1991-04-10 Somar Corporation Penetrable, epoxy resin composition
EP1065456B1 (en) * 1989-03-01 2006-06-28 Polar Technologies Holdings B.V. Portable snow-making apparatus
US5201248A (en) * 1989-09-19 1993-04-13 Sumitomo Bakelite Company Limited Materials for balancing rotators and method for balancing rotators
JP2828346B2 (en) * 1990-12-27 1998-11-25 アスモ株式会社 Method and apparatus for correcting dynamic balance of rotating body
JPH0996901A (en) * 1995-09-30 1997-04-08 Toppan Printing Co Ltd Photosensitive resin composition and printed circuit board using same
WO2012168414A1 (en) * 2011-06-10 2012-12-13 Carnehammar, Prof. Dr. Lars Bertil Method, apparatus and system for reducing vibration in a rotary system of a tool

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5996857A (en) * 1982-11-24 1984-06-04 Nippon Radiator Co Ltd Imbalance correcting method for armature in flat motor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5996857A (en) * 1982-11-24 1984-06-04 Nippon Radiator Co Ltd Imbalance correcting method for armature in flat motor

Also Published As

Publication number Publication date
JPS63311A (en) 1988-01-05

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