JP3885945B2 - Anaerobic curable composition and method for curing anaerobic curable composition - Google Patents
Anaerobic curable composition and method for curing anaerobic curable composition Download PDFInfo
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Description
【0001】
【発明の属する技術分野】
本発明は、従来の嫌気硬化性接着剤の性質を持ち、且つ空気存在下においても加熱することで硬化する性質を持つ嫌気硬化性組成物および嫌気硬化性組成物の硬化方法に関する。
【0002】
【従来の技術】
嫌気硬化性組成物は(メタ)アクリル酸エステルモノマーを主成分として空気または酸素(以下、単に空気という)と接触している間は長期間ゲル化せずに液状状態で安定に保たれ、空気が遮断もしくは排除されると急速に硬化する性質を有するものであり、このような性質を利用して前記組成物はネジ、ボルト等の接着、固定、嵌め合い部品の固着、フランジ面間の接着、シール、鋳造部品に生じる巣孔の充填等に使用されている。
【発明が解決しようとする課題】
【0003】
嫌気硬化性組成物は塗布した部分を貼り合わせたり嵌め合わせることにより空気との接触が断たれ重合反応が開始して硬化する。よって、嫌気性組成物を多めに塗布してしまったりして接着部よりはみ出した部分は空気と接触しているため硬化せずにそのまま未硬化のまま存在してしまうという欠点がある。はみ出して未硬化の嫌気性組成物は他の部位に垂れ流れて周囲を汚染したり、自然蒸発による揮発成分が発生することで他の部位を侵すなどして悪影響を及ぼす可能性がある。このような問題を解決するため、嫌気硬化性組成物に光硬化性を付与し、嫌気性で硬化しないはみ出し部分に紫外線を当て硬化させるという手法が考えられてた。また、はみ出し部分が垂れ流れないように粘度を高くするなど垂れにくさを持たせた接着剤などが用いられてきた。
【0004】
ところが、光硬化性を付与した場合、光照射機を準備しなければならず、また、はみ出し部が必ずしも光が当たるとは限らず、当たらないまたは当たりにくい部位は依然未硬化のままであった。また、垂れ流れない用に粘度を高くした場合は塗布時の作業性が悪化してしまい欠点を充足できる嫌気硬化性組成物は得られていない。
【0005】
嫌気硬化性組成物に加熱硬化性を付与したものははみ出し部を硬化することができる。しかしながら、嫌気硬化のメカニズムはラジカル重合性化合物を重合させようとする成分とラジカル重合性化合物の重合を抑制しようとする要因を共存させ両成分のバランスを適切にすることにより達成されている。よって、加熱硬化性を付与するために過酸化物を多量に入れたり、過酸化物の分解温度(半減期温度)が低いものを使用すると、嫌気硬化性組成物の保存性が極端に悪くなり工業製品としての保存性は達成できない。
【0006】
仮に保存性を犠牲にして加熱硬化性を付与するために過酸化物を多量添加してもはみ出し部の表面は酸素による硬化阻害により未硬化のまま残ってしまうため、表面がべとついてしまう。
【0007】
【課題を解決するための手段】
本発明は上述した従来の問題点を克服するものであり、すなわち (a)分子中に少なくとも1つ以上のラジカル重合性官能基を有する化合物:100重量部、(b)有機過酸化物:0.1〜5重量部、(c)o−ベンゾイックスルフィミド:0.5〜5重量部および(d)炭素粉末:5〜50重量部からなることを特徴とする嫌気硬化性組成物。を提供するものである。また、上記組成物をを塗布し、加熱することにより、接着部分よりはみ出して空気と接触した嫌気硬化性組成物を硬化させることを特徴とする嫌気硬化性組成物の硬化方法。を提供するものである。
【0008】
本発明に使用される(a)分子中に少なくとも1つ以上のラジカル重合性官能基を有する化合物としては、アクリル酸、メタクリル酸等のビニル基を分子中に有するモノマー、オリゴマー、ポリマーが挙げられる。この重合性モノマーを更に具体的に挙げると、例えば、メチル(メタ)アクリレート、エチル(メタ)アクリレート、ブチル(メタ)アクリレート、2−エチルヘキシル(メタ)アクリレート、フェニル(メタ)アクリレート、ベンジル(メタ)アクリレート等のモノエステル類;2−ヒドロキシエチル(メタ)アクリレート、2−ヒドロキシプロピル(メタ)アクリレート等のヒドロキシアルキルエステル類;エチレングリコールジアクリレート、ポリエチレングリコールジ(メタ)アクリレート、ネオペンチルグリコールジ(メタ)アクリレート、トリメチロールプロパントリ(メタ)アクリレート、ペンタエリスリトールテトラアクリレート等の多価エステル類であるが、これらに限定されるものではなく、通常嫌気性接着剤の分野で使用されているものである。これらの重合性モノマーは単独で若しくは二種以上の混合物として用いることができる。
【0009】
重合性オリゴマーとしては、例えば、マレート基、フマレート基、アリル基、(メタ)アクリレート基を有する硬化性樹脂、イソシアネート改質アクリルオリゴマー、エポキシ改質アクリルオリゴマー、ポリエステルアクリルオリゴマー、ポリエーテルアクリルオリゴマー等が挙げられ、これらのオリゴマーは単独で若しくは二種以上の混合物として用いることができる。重合性オリゴマーは嫌気硬化性組成物の粘度の調整、あるいはその硬化物の特性を調整する目的で適宜含有させることができる。
【0010】
また、重合性ポリマーとしては不飽和ポリエステル樹脂、不飽和アクリル樹脂等の重合性不飽和重合体が挙げられる。この重合性不飽和重合体は上記の重合性モノマーと合わせて用いることが好ましい。
【0011】
本発明に用いられる(b)有機過酸化物は従来より嫌気硬化性組成物にて用いられているもので、特に限定されるものではなく、例えば、クメンハイドロパーオキサイド、t−ブチルハイドロパーオキサイド、p−メンタンハイドロパーオキサイド、メチルエチルケトンパーオキサイド、シクロヘキサンパーオキサイド、ジクミルパーオキサイド、ジイソプロピルベンゼンハイドロパーオキサイド等のハイドロパーオキサイド類、その他、ケトンパーオキサイド類、ジアリルパーオキサイド類、パーオキシエステル類等の有機過酸化物等が挙げられる。
【0012】
これらの有機過酸化物は単独で或いは二種以上の混合物として用いることができる。この(b)成分の配合量は、(a)成分100重量部に対して0.1〜5重量部である。この場合、0.1重量部よりも少ないと重合反応を生じさせるのに不十分であり、5重量部よりも多いと、嫌気硬化性組成物の安定性が低下する。
【0013】
本発明において用いられる(c)成分はo−ベンゾイックスルフィミドであり嫌気性組成物には通常使用される成分である。o−ベンゾイックスルフイミドはいわゆるサッカリンであり、(c)成分の添加量は(a)成分100重量部に対して0.5〜5重量部配合される。
【0014】
本発明において用いられる(d)成分は炭素粉末であり、人造黒鉛、天然黒鉛等の黒鉛粉末、カーボンブラック、熱分解炭素、コークス粉末があげられる。炭素粉末の粒径は0.1〜50μmである。(d)成分は100重量部に対して5〜50重量部添加することができる。5より少ないと加熱硬化性を期待することはできず、50重量部より多いと硬化物の物性が固くなってしまう。
【0015】
(d)成分は例えば、樹脂に導電性を付与するために添加されることはあるが、硬化性には寄与しないと考えられてきたが、嫌気性組成物に添加することにより通常の嫌気硬化性には特に寄与せず、加熱硬化性、表面硬化性を向上する効果があることは予想できないことであった。また、加熱硬化性を向上することができるが、保存性を悪化させることがない。
【0016】
本組成物は上記成分以外にさらに重合を促進する成分を少量添加することができる。重合促進剤としてはアミン化合物、メルカプタン化合物、ヒドラジン誘導体を挙げることができる。アミン化合物は1,2,3,4−テトラヒドロキノリン、1,2,3,4−テトラヒドロキナルジン等の複素環第2級アミン、キノリン、メチルキノリン、キナルジン、キノキサリンフェナジン等の複素環第3級アミン、N,N−ジメチル−アニシジン、N,N−ジメチルアニリン等の芳香族第三級アミン類、1,2,4−トリアゾール、オキサゾール、オキサジアゾール、チアジアゾール、ベンゾトリアゾール、ヒドロキシベンゾトリアゾール、ベンゾチアゾール、ベンゾキサゾール、1,2,3ベンゾチアジアゾール、3−メルカプトベンゾトリゾール等のアゾール系化合物等が挙げられる。また、メルカプタン化合物としてはn−ドデシルメルカプタン、エチルメルカプタン、ブチルメルカプタン等の直鎖型メルカプタンが挙げられる。ヒドラジン誘導体としてはエチルカルバゼート、N−アミノルホダニン、アセチルフェニルヒドラジン、p−ニトロフェニルヒドラジン、p−トリスルホニルヒドラジド等が挙げられるがこれに限定したものではない。
【0017】
これらの重合促進剤の配合割合は、重合性モノマーの重量又は重合性モノマーとオリゴマー及び/又は重合性不飽和重合体との混合物の重量が100重量部に対して0〜1重量部であり、好ましくは0.1〜0.5重量部である。重合促進剤の配合割合が0.1重量部未満では重合促進剤としての効果はなく、また0.5重量部を越えると嫌気性組成物の保存安定性が悪くなる。
【0018】
本発明は更に種々の添加剤を使用できる。例えば、保存安定性を得るためには、ベンゾキノン、ハイドロキノン、ハイドロキノンモノメチルエーテル等のラジカル吸収剤、エチレンジアミン4酢酸又はその2−ナトリウム塩、シユウ酸、アセチルアセトン、o−アミノフエノール等の金属キレート化剤等を添加することもできる。
【0019】
また、本組成物の保存安定性を劣化させない程度に従来使用されているメルカプタン類、アミン類等の重合促進剤を添加することもできる。更に、その他に嫌気硬化性樹脂の性状や硬化物の性質を調整するために、増粘剤、充填剤、可塑剤、着色剤等を必要に応じて使用することができる。
【0020】
【発明の実施の形態】
【実施例】
以下、本発明を実施例により優れた効果を証明する。なお、表中の配合はすべて重量部である。(a)成分としてポリエチレングリコール#200ジメタクリレート:商品名4G(新中村化学社製),ジペンタエリスリトールヘキサアクリレート:商品名:DPH−A(日本化薬社製)を使用した。(b)成分の有機過酸化物1,2としてクメンハイドロパーオキサイド、パーブチルI(日本油脂:tert−dimethyl−2,5−bis(m−toluol peroxy)hexane)、(c)成分としてo−ベンゾイックスルフィミドを使用し、その他の調整成分としてEDTA・2Na、充填剤としてアエロジル#200(日本アエロジル社製)を使用した、(d)成分の炭素粉末1,2としてNICABEADS:MC−0520(日本カーボン)、炭素粉末(添川理化学)を使用して、表1に記載の配合量で嫌気性接着剤を調製した。試験に用いたテストピースは、材質SPCC−SD、100mm×25mm(JIS G 3141)を使用した。
【0021】
上記のように調整した各組成物を100mm×25mm鉄のテストピースに二滴垂らし、各温度、各時間それぞれ評価を行った。評価結果は、表1に示した。硬化性の基準は次のように定めた。0〜5段階評価で0:硬化物無し、1:硬化物若干有り、2:半分硬化、3:概ね硬化するが表面が未硬化、4:表面も概ね硬化するがややタック有り、5:完全硬化とした。また、保存性試験は40℃で3ヶ月保存し、ゲル化物が生じたかどうかを確認した。増粘もゲル化もしないものを○、ゲル化はしないが増粘したものを△、ゲル化したものを×とした。また、保存性試験を行った試料の硬化性試験を行った。120℃で2時間加熱して硬化度合いを測定した。結果を表1に示す。表からわかるように炭素粉末の添加量と硬化性についてはほとんど変わらないことが確認でき、炭素を添加してあるものとしてないものでは大きな違いが確認できた。
【0022】
【表1】
【0023】
【発明の効果】
これまで、嫌気性接着剤のはみ出し部分はプライマーや紫外線硬化性を付与しなければ硬化させることはできなかった。また、嫌気硬化性の保存安定性を犠牲にして加熱硬化性を付与することはできたが、高温、長時間行わないと十分に硬化させることはできず、さらにその組成によっては高温、長時間の加熱でも表面まで硬化させることは難しかった。しかし、本発明では嫌気硬化性の保存安定性を低下させることなく低温短時間で加熱硬化させることができる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an anaerobic curable composition having properties of a conventional anaerobic curable adhesive and cured by heating even in the presence of air, and a method for curing the anaerobic curable composition.
[0002]
[Prior art]
The anaerobic curable composition has a (meth) acrylic acid ester monomer as a main component and remains stable in a liquid state without being gelled for a long time while in contact with air or oxygen (hereinafter simply referred to as air). It has the property of rapidly curing when it is cut off or eliminated, and by using such properties, the composition adheres to screws, bolts, etc., fixes, secures mating parts, and bonds between flange surfaces , Sealing, filling of burrows generated in cast parts, etc.
[Problems to be solved by the invention]
[0003]
The anaerobic curable composition is cured by laminating the contact with the air by pasting or fitting the applied portions together and starting the polymerization reaction. Therefore, there is a drawback that the portion that has been applied excessively from the anaerobic composition and protruded from the bonded portion is in contact with air and thus remains uncured as it is without being cured. The uncured and uncured anaerobic composition may spill over to other sites and contaminate the surroundings, or may cause adverse effects by causing volatile components by natural evaporation to invade other sites. In order to solve such a problem, a technique has been considered in which photocurability is imparted to an anaerobic curable composition, and ultraviolet light is applied to the protruding portion that is anaerobic and not cured. In addition, an adhesive or the like has been used that has a dripping resistance such as increasing the viscosity so that the protruding portion does not flow.
[0004]
However, when photocurability is imparted, a light irradiator must be prepared, and the protruding portion is not always exposed to light, and the portion that does not hit or is hard to hit still remains uncured. . In addition, when the viscosity is increased so as not to sag, an anaerobic curable composition capable of satisfying the defects has not been obtained because workability during application deteriorates.
[0005]
An anaerobic curable composition imparted with heat curability can cure the protruding portion. However, the mechanism of anaerobic curing is achieved by coexisting a component that is intended to polymerize a radically polymerizable compound and a factor that is intended to suppress the polymerization of the radically polymerizable compound, thereby making the balance between the two components appropriate. Therefore, if a large amount of peroxide is added in order to impart heat curability or a material having a low peroxide decomposition temperature (half-life temperature) is used, the storage stability of the anaerobic curable composition becomes extremely poor. Preservability as an industrial product cannot be achieved.
[0006]
Even if a large amount of peroxide is added to provide heat curability at the expense of storage stability, the surface of the protruding portion remains uncured due to inhibition of curing by oxygen, and the surface becomes sticky.
[0007]
[Means for Solving the Problems]
The present invention overcomes the above-mentioned conventional problems: (a) a compound having at least one radical polymerizable functional group in the molecule : 100 parts by weight ; (b) an organic peroxide : 0 An anaerobic curable composition comprising 1 to 5 parts by weight , (c) o- benzoixsulfimide : 0.5 to 5 parts by weight, and (d) carbon powder : 5 to 50 parts by weight . Is to provide. Also, a method for curing an anaerobic curable composition comprising curing the anaerobic curable composition that protrudes from the bonded portion and comes into contact with air by applying and heating the composition. Is to provide.
[0008]
Examples of the compound (a) having at least one radical polymerizable functional group in the molecule used in the present invention include monomers, oligomers, and polymers having a vinyl group in the molecule such as acrylic acid and methacrylic acid. . More specific examples of this polymerizable monomer include, for example, methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, phenyl (meth) acrylate, and benzyl (meth). Monoesters such as acrylates; Hydroxyalkyl esters such as 2-hydroxyethyl (meth) acrylate and 2-hydroxypropyl (meth) acrylate; ethylene glycol diacrylate, polyethylene glycol di (meth) acrylate, neopentyl glycol di (meth) ) Polyesters such as acrylate, trimethylolpropane tri (meth) acrylate, pentaerythritol tetraacrylate, etc., but are not limited to these and are usually used in the field of anaerobic adhesives. It is one that is use. These polymerizable monomers can be used alone or as a mixture of two or more.
[0009]
Examples of the polymerizable oligomer include curable resins having a malate group, a fumarate group, an allyl group, and a (meth) acrylate group, an isocyanate-modified acrylic oligomer, an epoxy-modified acrylic oligomer, a polyester acrylic oligomer, and a polyether acrylic oligomer. These oligomers can be used singly or as a mixture of two or more. The polymerizable oligomer can be appropriately contained for the purpose of adjusting the viscosity of the anaerobic curable composition or adjusting the properties of the cured product.
[0010]
Examples of the polymerizable polymer include polymerizable unsaturated polymers such as unsaturated polyester resins and unsaturated acrylic resins. This polymerizable unsaturated polymer is preferably used in combination with the above polymerizable monomer.
[0011]
The (b) organic peroxide used in the present invention is conventionally used in anaerobic curable compositions and is not particularly limited. For example, cumene hydroperoxide, t-butyl hydroperoxide , P-menthane hydroperoxide, methyl ethyl ketone peroxide, cyclohexane peroxide, dicumyl peroxide, diisopropylbenzene hydroperoxide, and other hydroperoxides, ketone peroxides, diallyl peroxides, peroxyesters, etc. Organic peroxides and the like.
[0012]
These organic peroxides can be used alone or as a mixture of two or more. The amount of component (b) is 0.1 to 5 parts by weight per 100 parts by weight of component (a). In this case, if it is less than 0.1 part by weight, it is insufficient to cause a polymerization reaction, and if it is more than 5 part by weight, the stability of the anaerobic curable composition is lowered.
[0013]
The component (c) used in the present invention is o-benzoixsulfimide and is a component that is usually used for anaerobic compositions. The o-benzoixsulfimide is so-called saccharin, and the amount of component (c) added is 0.5 to 5 parts by weight per 100 parts by weight of component (a).
[0014]
The component (d) used in the present invention is carbon powder, and examples thereof include graphite powder such as artificial graphite and natural graphite, carbon black, pyrolytic carbon, and coke powder. The particle size of the carbon powder is 0.1 to 50 μm. Component (d) can be added in an amount of 5 to 50 parts by weight per 100 parts by weight. If it is less than 5 , heat curability cannot be expected, and if it exceeds 50 parts by weight, the physical properties of the cured product will be hard.
[0015]
Although component (d) may be added to impart conductivity to the resin, for example, it has been thought that it does not contribute to curability, but by adding it to an anaerobic composition, normal anaerobic curing It was impossible to predict that there was an effect of improving heat curability and surface curability. Moreover, although heat-hardening property can be improved, preservability is not deteriorated.
[0016]
In addition to the above components, the composition may further contain a component that promotes polymerization. Examples of the polymerization accelerator include amine compounds, mercaptan compounds, and hydrazine derivatives. Amine compounds include heterocyclic secondary amines such as 1,2,3,4-tetrahydroquinoline and 1,2,3,4-tetrahydroquinaldine, and tertiary heterocyclic amines such as quinoline, methylquinoline, quinaldine and quinoxalinephenazine. Aromatic tertiary amines such as amine, N, N-dimethyl-anisidine, N, N-dimethylaniline, 1,2,4-triazole, oxazole, oxadiazole, thiadiazole, benzotriazole, hydroxybenzotriazole, benzo Examples thereof include azole compounds such as thiazole, benzoxazole, 1,2,3 benzothiadiazole, and 3-mercaptobenzotrizole. Examples of the mercaptan compound include linear mercaptans such as n-dodecyl mercaptan, ethyl mercaptan, and butyl mercaptan. Examples of the hydrazine derivative include, but are not limited to, ethyl carbazate, N-aminosulfodanin, acetylphenyl hydrazine, p-nitrophenyl hydrazine, p-trisulfonyl hydrazide and the like.
[0017]
The blending ratio of these polymerization accelerators is 0 to 1 part by weight with respect to 100 parts by weight of the weight of the polymerizable monomer or the mixture of the polymerizable monomer and the oligomer and / or the polymerizable unsaturated polymer. Preferably it is 0.1-0.5 weight part. When the blending ratio of the polymerization accelerator is less than 0.1 parts by weight, there is no effect as a polymerization accelerator, and when it exceeds 0.5 parts by weight, the storage stability of the anaerobic composition is deteriorated.
[0018]
The present invention can further use various additives. For example, in order to obtain storage stability, a radical absorbent such as benzoquinone, hydroquinone, hydroquinone monomethyl ether, a metal chelating agent such as ethylenediaminetetraacetic acid or its 2-sodium salt, oxalic acid, acetylacetone, o-aminophenol, etc. Can also be added.
[0019]
In addition, polymerization accelerators such as mercaptans and amines that are conventionally used can be added to such an extent that the storage stability of the composition does not deteriorate. Furthermore, in order to adjust the properties of the anaerobic curable resin and the properties of the cured product, a thickener, a filler, a plasticizer, a colorant, and the like can be used as necessary.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
【Example】
In the following, the present invention is proved to be superior in effect by examples. All the formulations in the table are parts by weight. As the component (a), polyethylene glycol # 200 dimethacrylate: trade name 4G (manufactured by Shin-Nakamura Chemical Co., Ltd.), dipentaerythritol hexaacrylate: trade name: DPH-A (manufactured by Nippon Kayaku Co., Ltd.) were used. (B) Component 1 or 2 as the organic peroxide 1, cumene hydroperoxide, perbutyl I (Japanese fats and oils: tert-dimethyl-2,5-bis (m-toluol peroxide) hexane), (c) o-benzo as the component (1) NICABEADS: MC-0520 (Japan) as carbon powders 1 and 2 of component (d) using IXTALFIMID, using EDTA · 2Na as other adjusting components, and using Aerosil # 200 (manufactured by Nippon Aerosil Co., Ltd.) as filler. Carbon) and carbon powder (Soekawa Rikagaku) were used to prepare anaerobic adhesives in the amounts shown in Table 1. The test piece used for the test was made of material SPCC-SD, 100 mm × 25 mm (JIS G 3141).
[0021]
Each composition prepared as described above was dropped on a 100 mm × 25 mm iron test piece and evaluated at each temperature and each time. The evaluation results are shown in Table 1. The standard of curability was determined as follows. 0 to 5 on a scale of 0: no cured product, 1: some cured product, 2: half cured, 3: almost cured, but the surface is uncured, 4: the surface is almost cured, but slightly tacky, 5: complete Hardened. Moreover, the preservation | save test was preserve | saved for three months at 40 degreeC, and it was confirmed whether the gelled material had arisen. A sample that was neither thickened nor gelled was marked as ◯, a gelled but not thickened as Δ, and a gelled as ×. Moreover, the sclerosis | hardenability test of the sample which performed the storage stability test was done. The degree of cure was measured by heating at 120 ° C. for 2 hours. The results are shown in Table 1. As can be seen from the table, it was confirmed that there was almost no change in the amount of carbon powder added and the curability, and a large difference was confirmed when carbon was not added.
[0022]
[Table 1]
[0023]
【The invention's effect】
Until now, the protruding portion of the anaerobic adhesive could not be cured unless a primer or UV curable property was imparted. In addition, although it was possible to impart heat curability at the expense of storage stability of anaerobic curing, it could not be sufficiently cured unless performed at a high temperature for a long time, and depending on its composition, it could be cured at a high temperature for a long time. It was difficult to cure the surface even by heating. However, in the present invention, heat curing can be performed at a low temperature in a short time without deteriorating the storage stability of anaerobic curing.
Claims (2)
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| JP2002118822A JP3885945B2 (en) | 2002-04-22 | 2002-04-22 | Anaerobic curable composition and method for curing anaerobic curable composition |
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| JP2002118822A JP3885945B2 (en) | 2002-04-22 | 2002-04-22 | Anaerobic curable composition and method for curing anaerobic curable composition |
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| JP3885945B2 true JP3885945B2 (en) | 2007-02-28 |
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| JP5201312B2 (en) * | 2007-03-30 | 2013-06-05 | 株式会社スリーボンド | Anaerobic curable composition |
| CN101809041B (en) * | 2007-09-25 | 2012-11-28 | 三键株式会社 | Anaerobically curable composition |
| WO2017126704A1 (en) | 2016-01-22 | 2017-07-27 | セメダイン株式会社 | Photocurable composition and product |
| JP6766315B2 (en) * | 2016-06-01 | 2020-10-14 | 株式会社スリーボンド | Anaerobic curable composition |
| WO2024135438A1 (en) * | 2022-12-21 | 2024-06-27 | 東亞合成株式会社 | Anaerobic curing-type adhesive agent composition, bonded laminate, and motor |
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