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JP2010189542A - Hemming adhesive corresponding to ckd transportation - Google Patents

Hemming adhesive corresponding to ckd transportation Download PDF

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Publication number
JP2010189542A
JP2010189542A JP2009035027A JP2009035027A JP2010189542A JP 2010189542 A JP2010189542 A JP 2010189542A JP 2009035027 A JP2009035027 A JP 2009035027A JP 2009035027 A JP2009035027 A JP 2009035027A JP 2010189542 A JP2010189542 A JP 2010189542A
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Prior art keywords
epoxy resin
ckd
adhesive
molecular weight
curing
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Japanese (ja)
Inventor
Daisuke Makino
大輔 牧野
Noriyasu Shiozaki
範康 塩嵜
Seishi Shibata
晴司 柴田
Makoto Seki
真琴 瀬木
Hozumi Tsutsumi
穂積 堤
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Toyota Motor Corp
Cemedine Automotive Co Ltd
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Toyota Motor Corp
Cemedine Automotive Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a hemming adhesive corresponding to CKD transportation preventing foaming upon curing even when being left under high temperature and high humidity conditions in an uncured state and having satisfactory curing properties and adhesiveness. <P>SOLUTION: In the hemming adhesive corresponding to CKD transportation including a first epoxy resin (A) having a number-average molecular weight of 300 to 500, a second epoxy resin (B) having a number-average molecular weight of 800 to 4,000, a curing agent (C), calcium oxide (D) and a filler (E), 1 to 50 pts.mass second epoxy resin (B) is compounded to 100 pts.mass first epoxy resin (A). <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

本発明は、CKD(Complete knock down)輸送に対応したヘミング接着剤に関する。   The present invention relates to a hemming adhesive compatible with CKD (Complete knock down) transportation.

通常、国内で自動車のパーツを組み立てて自動車を製造する場合には、パーツに接着剤を塗布した後、当日に加熱硬化させている。   Usually, when an automobile part is assembled in Japan and an automobile is manufactured, an adhesive is applied to the part and then heat-cured on the same day.

一方、海外へ自動車を輸出する場合、自動車のパーツのままで輸送し、輸出先の国で組立てを行う、いわゆるCKD(Complete knock down;完全ノックダウン)方式がとられることが多い。   On the other hand, when an automobile is exported overseas, a so-called CKD (Complete knock down) system is often employed in which automobile parts are transported as they are and assembled in the country of the export destination.

このようなCKDパーツを輸送するにあたっては、パーツに塗布された接着剤が加熱硬化されるのは、最大で30日後が予定されている。このため、CKDパーツの輸送条件としては、例えば、(50℃×95%RH×8時間→23℃×50%RH×16時間)×30日間が想定されている。   In transporting such CKD parts, it is expected that the adhesive applied to the parts will be cured by heating after 30 days at the maximum. For this reason, as CKD parts transport conditions, for example, (50 ° C. × 95% RH × 8 hours → 23 ° C. × 50% RH × 16 hours) × 30 days is assumed.

しかしながら、CKDパーツの輸送にあたって、高温多湿の条件下で放置されたりした場合には、未硬化の接着剤中には吸湿により水分が吸収され、焼き付け時にその水分が急激に蒸発するため発泡する場合があった。つまり、接着剤中へ水分が吸収され、この水分が加熱硬化時に気化することによって接着剤の発泡現象が発生してしまう場合があった。このように発泡してしまうと接着剤の性能面で問題が生じる場合があるし、外観が損なわれる。   However, when CKD parts are transported and left under high-temperature and high-humidity conditions, moisture is absorbed in the uncured adhesive due to moisture absorption, and foaming occurs due to the rapid evaporation of the moisture during baking. was there. That is, moisture is absorbed into the adhesive, and the moisture is vaporized during heat curing, which may cause the foaming phenomenon of the adhesive. If foaming occurs in this way, there may be a problem in the performance of the adhesive, and the appearance is impaired.

そこで焼付け時の発泡を防止するため、未硬化状態での接着剤の吸湿を防止する方法として、シリコンオイルなどの撥水性化合物を添加する方法が考えられる。しかし吸湿を防止するためには撥水性化合物を10%以上添加する必要があり、接着剤としての性能が損なわれる。また電着塗料のハジキの原因となる場合もある。   Therefore, in order to prevent foaming during baking, a method of adding a water-repellent compound such as silicone oil can be considered as a method for preventing moisture absorption of the adhesive in an uncured state. However, in order to prevent moisture absorption, it is necessary to add 10% or more of a water-repellent compound, and the performance as an adhesive is impaired. It may also cause repellency of the electrodeposition paint.

また、焼付け時の発泡を防止するため、未硬化状態での接着剤の吸湿を防止する方法として、酸化カルシウム(CaO)を添加する方法も一般に知られている。しかし、酸化カルシウムを増量してみたが、十分に発泡を抑制するには至らず、酸化カルシウムを増量するだけでは、発泡を効果的に防ぐことはできなかった。   In addition, a method of adding calcium oxide (CaO) is generally known as a method for preventing moisture absorption of the adhesive in an uncured state in order to prevent foaming during baking. However, although the amount of calcium oxide was increased, foaming was not sufficiently suppressed, and foaming could not be effectively prevented only by increasing the amount of calcium oxide.

特開平6−184511号公報JP-A-6-184511 特開平11−61072号公報JP 11-61072 A

本発明は上記した従来技術の問題点に鑑みてなされたもので、未硬化状態で高温多湿下に放置された場合であっても、硬化時の発泡が防止され、良好な硬化性及び接着性を有するCKD輸送対応ヘミング接着剤を提供することを目的とする。   The present invention has been made in view of the above-mentioned problems of the prior art, and even when left in an uncured state under high temperature and high humidity, foaming during curing is prevented, and good curability and adhesiveness are achieved. It is an object of the present invention to provide a CKD transport-compatible hemming adhesive.

上記課題を解決するために、本発明のCKD輸送対応ヘミング接着剤は、
CKD輸送に対応したヘミング接着剤であって、
(A)数平均分子量300以上500以下の第1のエポキシ樹脂、
(B)数平均分子量800以上4000以下、好ましくは800以上2000以下の第2のエポキシ樹脂、
(C)硬化剤、
(D)酸化カルシウム、及び
(E)充填材、
を含有し、
前記第1のエポキシ樹脂(A)100質量部に対し、前記第2のエポキシ樹脂(B)を1〜50質量部、好ましくは5〜20質量部配合することを特徴とする。
In order to solve the above problems, the hemming adhesive for CKD transport of the present invention is
A hemming adhesive for CKD transport,
(A) a first epoxy resin having a number average molecular weight of 300 to 500,
(B) a second epoxy resin having a number average molecular weight of 800 to 4000, preferably 800 to 2000,
(C) a curing agent,
(D) calcium oxide, and (E) a filler,
Containing
1 to 50 parts by mass, preferably 5 to 20 parts by mass of the second epoxy resin (B) is blended with respect to 100 parts by mass of the first epoxy resin (A).

このように、数平均分子量300以上500以下の低分子タイプのエポキシ樹脂100質量部に対して、数平均分子量が800以上4000以下、好ましくは800以上2000以下の高分子タイプのエポキシ樹脂を1〜50質量部、好ましくは5〜20質量部配合することで、未硬化状態での接着剤の吸湿を効果的に防止できる。数平均分子量は、GPC(ゲルパーミエーションクロマトグラフィー)を使って測定することができる。   Thus, with respect to 100 parts by mass of a low molecular epoxy resin having a number average molecular weight of 300 or more and 500 or less, a high molecular type epoxy resin having a number average molecular weight of 800 or more and 4000 or less, preferably 800 or more and 2000 or less is 1 to 1. By blending 50 parts by mass, preferably 5 to 20 parts by mass, moisture absorption of the adhesive in an uncured state can be effectively prevented. The number average molecular weight can be measured using GPC (gel permeation chromatography).

これは、エポキシ樹脂の一部を高分子量のものにすることで、接着剤重量あたりの官能基数が少なくなり、親水性が減り水分が入り込みにくくなるためである。   This is because a part of the epoxy resin has a high molecular weight, so that the number of functional groups per weight of the adhesive is reduced, the hydrophilicity is reduced, and moisture hardly enters.

その結果、高温多湿下に未硬化状態で放置されるCKDパーツの輸送後の含有水分率が低下して発泡を抑制する効果がさらに大きくなり、CKDパーツの輸送後であっても接着剤が発泡せずに所定の性能を満足できる。   As a result, the moisture content after transportation of CKD parts left uncured in high temperature and humidity is reduced, and the effect of suppressing foaming is further increased, and the adhesive foams even after transportation of CKD parts. Without satisfying the predetermined performance.

また、ガラスビーズをスペーサーとして含むのがさらに好適である。   Further, it is more preferable to include glass beads as a spacer.

本発明によれば、未硬化状態で高温多湿下に放置された場合であっても、硬化時の発泡が防止され、良好な硬化性及び接着性を有するCKD輸送対応ヘミング接着剤を提供することができるという著大な効果を奏する。   According to the present invention, there is provided a CKD transport-compatible hemming adhesive that prevents foaming during curing and has good curability and adhesiveness even when left in an uncured state under high temperature and high humidity. There is a great effect that you can.

以下に本発明の実施の形態を説明するが、これらは例示的に示されるもので、本発明の技術思想から逸脱しない限り種々の変形が可能なことはいうまでもない。   Embodiments of the present invention will be described below, but these are exemplarily shown, and it goes without saying that various modifications are possible without departing from the technical idea of the present invention.

上記のように、本発明に係るCKD輸送対応ヘミング接着剤は、(A)数平均分子量300以上500以下の第1のエポキシ樹脂と、(B)数平均分子量800以上4000以下の第2のエポキシ樹脂と、(C)硬化剤と、(D)酸化カルシウムと、及び(E)充填材とを含有するものである。   As described above, the hemming adhesive for CKD transport according to the present invention includes (A) a first epoxy resin having a number average molecular weight of 300 to 500 and (B) a second epoxy having a number average molecular weight of 800 to 4000. It contains a resin, (C) a curing agent, (D) calcium oxide, and (E) a filler.

成分(A)及び(B)に用いられるエポキシ樹脂としては、この種の組成物において使用されている任意のものを使用することができ、例えば、ビスフェノールA、ビスフェノールF等のグリシジルエーテル形、グリシジルエステル形、グリシジルアミン形、線状脂肪族エポキサイド形、脂環式エポキサイド形、及び、ノボラック形等のエポキシ樹脂を挙げることができ、これらを単独でまたは2種以上を組合せて使用することができる。成分(A)に用いられるエポキシ樹脂のエポキシ当量としては、150〜300[g/eq]のものが好適に使用することができる。(B)に用いられるエポキシ樹脂のエポキシ当量としては、400〜5000[g/eq]のものが好適に、400〜1000[g/eq]のものがより好適に使用することができる。   As the epoxy resin used for the components (A) and (B), any resin used in this type of composition can be used. For example, glycidyl ether type such as bisphenol A and bisphenol F, glycidyl Examples thereof include epoxy resins such as ester, glycidylamine, linear aliphatic epoxide, alicyclic epoxide, and novolac, and these can be used alone or in combination of two or more. . As an epoxy equivalent of the epoxy resin used for a component (A), the thing of 150-300 [g / eq] can be used conveniently. As an epoxy equivalent of the epoxy resin used for (B), the thing of 400-5000 [g / eq] is suitable, and the thing of 400-1000 [g / eq] can be used more suitably.

成分(C)に用いられる硬化剤としては、この種の加熱活性形の共反応性(多官能性)硬化剤或いは触媒性硬化剤(硬化触媒)として知られた任意のものを使用することができ、例えば、ジシアンジアミド(DICY)、イソフタル酸ジヒドラジド等の有機酸ジヒドラジド、ジアミノジフェニルスルホン(DDS)等のポリアミン、N.N’−ジアルキルチオ尿素誘導体、2−n−ペンタデシルイミダゾール等のイミダゾール誘導体等を使用することができる。これらは、使用するエポキシ樹脂及び硬化条件等に応じて適宜配合することができるが、成分(A)及び(B)のエポキシ樹脂合計100質量部に対して約1〜15質量部、好ましくは6〜10質量部の割合で配合することができる。   As the curing agent used for component (C), it is possible to use any of these known heat-activated co-reactive (polyfunctional) curing agents or catalytic curing agents (curing catalysts). For example, organic acid dihydrazides such as dicyandiamide (DICY) and isophthalic acid dihydrazide, polyamines such as diaminodiphenylsulfone (DDS), N.I. N'-dialkylthiourea derivatives, imidazole derivatives such as 2-n-pentadecylimidazole, and the like can be used. These can be blended appropriately according to the epoxy resin used and curing conditions, etc., but about 1 to 15 parts by weight, preferably 6 parts per 100 parts by weight of the total of the epoxy resins of components (A) and (B) It can mix | blend in the ratio of -10 mass parts.

(D)成分の酸化カルシウムは、吸湿剤として作用するものであり、使用するエポキシ樹脂及び硬化条件等に応じて適宜配合することができるが、成分(A)及び(B)のエポキシ樹脂合計100質量部に対して約10〜50質量部、好ましくは20〜30質量部の割合で配合することができる。   The component (D) calcium oxide acts as a hygroscopic agent and can be appropriately blended according to the epoxy resin used and curing conditions, etc., but the total of the epoxy resins of components (A) and (B) is 100. About 10-50 mass parts with respect to a mass part, Preferably it can mix | blend in the ratio of 20-30 mass parts.

(E)成分に用いられる充填材としては、充填材として公知の化合物を広く使用でき、特に限定されないが、例えば、炭酸カルシウム、タルク、クレー、水酸化アルミニウム、水酸化カルシウム、水酸化マグネシウム、マイカ、アルミナ、炭酸マグネシウム、シリカ粉末、セルロース粉末、ポリエチレン等の樹脂粉末、金属粉末などが挙げられる。また、無機繊維等も用いられる。さらに、充填材として中空充填材を添加することも出来る。中空充填材としては、ポリエステル樹脂、フェノール樹脂、ポリオレフィン樹脂、アミノ樹脂、塩化ビニリデン・アクリロニトリル共重合樹脂、シリコーン樹脂等よりなる有機系の中空充填材や、シラス、フライアッシュ、アルミナ、ガラス、カーボン等の無機系の中空充填材などが挙げられる。これらの充填材は1種又は2種類以上組み合わせて使用することが出来る。上記充填材の添加量は特に限定されないが、成分(A)及び(B)のエポキシ樹脂合計100質量部に対して1〜100質量部、好ましくは10〜50質量部の割合で配合することができる。   (E) As a filler used for a component, a well-known compound can be widely used as a filler, and it is not specifically limited, For example, calcium carbonate, talc, clay, aluminum hydroxide, calcium hydroxide, magnesium hydroxide, mica , Alumina, magnesium carbonate, silica powder, cellulose powder, resin powder such as polyethylene, metal powder, and the like. In addition, inorganic fibers and the like are also used. Furthermore, a hollow filler can be added as a filler. Hollow fillers include polyester resin, phenol resin, polyolefin resin, amino resin, vinylidene chloride / acrylonitrile copolymer resin, organic hollow filler made of silicone resin, shirasu, fly ash, alumina, glass, carbon, etc. Inorganic hollow fillers. These fillers can be used alone or in combination of two or more. Although the addition amount of the said filler is not specifically limited, It is 1-100 mass parts with respect to 100 mass parts of total epoxy resins of a component (A) and (B), Preferably it is mix | blended in the ratio of 10-50 mass parts. it can.

以上の成分の他に、本発明のCKD輸送対応ヘミング接着剤には、ガラスビーズ等のスペーサー、コロイダルシリカ、コロイダル炭酸カルシウム等のチキソ剤(増粘剤)、着色顔料、可塑剤、反応性希釈剤、可撓性付与剤、安定剤、溶剤、及びその他の添加剤等を必要に応じて適宜添加することができる。   In addition to the above components, the hemming adhesive for CKD transport of the present invention includes spacers such as glass beads, thixotropic agents (thickeners) such as colloidal silica and colloidal calcium carbonate, color pigments, plasticizers, reactive dilutions. An agent, a flexibility imparting agent, a stabilizer, a solvent, other additives, and the like can be appropriately added as necessary.

以下に実施例をあげて本発明をさらに具体的に説明するが、これらの実施例は例示的に示されるもので限定的に解釈されるべきでないことはいうまでもない。   The present invention will be described more specifically with reference to the following examples. However, it is needless to say that these examples are shown by way of illustration and should not be construed in a limited manner.

(実施例1〜5及び比較例1〜3)
下記表1に示す質量部数の各成分を用いて、以下の手順でヘミング接着剤を製造した。まず、高分子量のエポキシ樹脂を加熱融解し、低分子量のエポキシ樹脂とダルトン社製万能ミキサーで混合した。次に、硬化剤以外の成分(吸湿剤、希釈剤、充填材、ガラスビーズ)を混合し、室温まで冷却した後、硬化剤を混合し、減圧脱泡してヘミング接着剤を得た。
(Examples 1-5 and Comparative Examples 1-3)
A hemming adhesive was produced according to the following procedure using each component of the number of parts shown in Table 1 below. First, a high molecular weight epoxy resin was melted by heating and mixed with a low molecular weight epoxy resin using a universal mixer manufactured by Dalton. Next, components other than the curing agent (humectant, diluent, filler, glass beads) were mixed and cooled to room temperature, and then the curing agent was mixed and degassed under reduced pressure to obtain a hemming adhesive.

Figure 2010189542
Figure 2010189542

表1における材料は以下の通りである。
*1)「jER807」ジャパンエポキシレジン(株)製のビスフェノールF型液状エポキシ樹脂
*2)「jER828」ジャパンエポキシレジン(株)製のビスフェノールA型液状エポキシ樹脂
*3)「jER834」ジャパンエポキシレジン(株)製のビスフェノールA型液状エポキシ樹脂
*4)「jER1001」ジャパンエポキシレジン(株)製のビスフェノールA型固形エポキシ樹脂
*5)「jER1004」ジャパンエポキシレジン(株)製のビスフェノールA型固形エポキシ樹脂
*6)「jER1010」ジャパンエポキシレジン(株)製のビスフェノールA型固形エポキシ樹脂
*7)「CML#35S」近江化学工業(株)製の酸化カルシウム
*8)「ED502S」(株)ADEKA製のアルキルグリシジルエーテル
*9)「NN#500」日東粉化工業(株)製の炭酸カルシウム
*10)「CG1200G」AIR PRODUCTS & CHEMICALS, Inc製のジシアンジアミド
*11)「MIL−117S」ポッターズ・バロティーニ(株)製のガラスビーズ(粒径0.3mm)
The materials in Table 1 are as follows.
* 1) "jER807" Japan Epoxy Resin Co., Ltd. bisphenol F type liquid epoxy resin * 2) "jER828" Japan Epoxy Resin Co., Ltd. bisphenol A type liquid epoxy resin * 3) "jER834" Japan Epoxy Resin ( Bisphenol A type liquid epoxy resin * 4) "jER1001" Japan Epoxy Resin Co., Ltd. bisphenol A type solid epoxy resin * 5) "jER1004" Japan Epoxy Resin Co., Ltd. bisphenol A type solid epoxy resin * 6) "jER1010" Japan Epoxy Resin Co., Ltd. bisphenol A type solid epoxy resin * 7) "CML # 35S" Omi Chemical Co., Ltd. calcium oxide * 8) "ED502S" manufactured by ADEKA Corporation Alkyl glycidyl ether * 9 "NN # 500" Calcium carbonate manufactured by Nitto Flour Chemical Co., Ltd. * 10) "CG1200G" AIR PRODUCTS & CHEMICALS, Inc. Dicyandiamide * 11) "MIL-117S" Potters Ballotini glass beads (Particle size 0.3mm)

上記製造した実施例1〜5及び比較例1〜3の各接着剤を以下に示す性能試験に供し、結果を下記の表2に示す。   The manufactured adhesives of Examples 1 to 5 and Comparative Examples 1 to 3 were subjected to the performance test shown below, and the results are shown in Table 2 below.

(1)初期接着強度
SPC鋼板(幅25mm×長さ100mm×1.6mm)に得られた接着剤を塗布厚さ0.3mmで縦25mm×横10mmの面積に塗布し、170℃のオーブンに30分間投入した。20℃で24時間冷却後5mm/minのスピードで引張り強度を測定した。
評価基準:
○:15kPa以上
×:15kPa未満
(1) Initial adhesive strength The adhesive obtained on the SPC steel plate (width 25 mm x length 100 mm x 1.6 mm) was applied to an area of 25 mm length x 10 mm width with a coating thickness of 0.3 mm and placed in an oven at 170 ° C. Added for 30 minutes. After cooling at 20 ° C. for 24 hours, the tensile strength was measured at a speed of 5 mm / min.
Evaluation criteria:
○: 15 kPa or more ×: less than 15 kPa

(2)耐湿養生後接着強度(未硬化放置後接着強度)
SPC鋼板(幅25mm×長さ100mm×1.6mm)に得られた接着剤を塗布厚さ0.3mmで縦25mm×横10mmの面積に塗布し、(温度:50℃、湿度:95%RH、時間:8時間)+(温度:23℃、湿度:50%RH、時間:16時間)を1サイクルとして、合計30サイクル養生したものを、170℃のオーブンに30分間投入した。20℃で24時間冷却後5mm/minのスピードで引張り強度を測定した。
評価基準:
○:15kPa以上
×:15kPa未満
(2) Adhesive strength after moisture curing (adhesive strength after leaving uncured)
The adhesive obtained on an SPC steel plate (width 25 mm x length 100 mm x 1.6 mm) was applied to an area of length 25 mm x width 10 mm with a coating thickness of 0.3 mm (temperature: 50 ° C, humidity: 95% RH). , Time: 8 hours) + (temperature: 23 ° C., humidity: 50% RH, time: 16 hours), and a total of 30 cycles were put into an oven at 170 ° C. for 30 minutes. After cooling at 20 ° C. for 24 hours, the tensile strength was measured at a speed of 5 mm / min.
Evaluation criteria:
○: 15 kPa or more ×: less than 15 kPa

(3)初期発泡状態
上記(1)の初期接着強度測定後の試験片上の接着剤硬化物破断面の発泡状態を目視観察した。
評価基準:
○:硬化物の発泡が認められない。
×:硬化物の発泡が認められる。
(3) Initial foaming state The foaming state of the fracture surface of the cured adhesive on the test piece after the initial adhesion strength measurement in (1) was visually observed.
Evaluation criteria:
○: Foaming of the cured product is not recognized.
X: Foaming of the cured product is observed.

(4)耐湿養生後発泡の有無
上記(2)の耐湿養生後接着強度測定後の試験片上の接着剤硬化物破断面の発泡状態を目視観察した。
評価基準:
○:硬化物の発泡が認められない。
×:硬化物の発泡が認められる。
(4) Presence / absence of foaming after moisture-curing resistance The foamed state of the fracture surface of the cured adhesive product on the test piece after the measurement of the adhesive strength after moisture-curing resistance of (2) was visually observed.
Evaluation criteria:
○: Foaming of the cured product is not recognized.
X: Foaming of the cured product is observed.

(5)作業性
作業性については実際のライン環境を想定し、40×1エアレスポンプからレギュレーター、高圧ホース3/4インチ×3m、3/8インチ×3mを経て塗布ガンの先端径1.2mmの先端ノズルよりの吐出量から評価した。試験時に材料の温度が23℃で安定するようして、ホース内の圧力が8MPaになるようにレギュレーターを調節した。試験は10秒吐出、50秒休止を1サイクルとして連続10サイクル行い、各サイクルの吐出量を平均した。シーラーポンプは 形式840−513、レギュレーターは形式903−958、ガンは形式235−627、先端ノズルは先端径1.2mmの形式300N082(以上、グラコ(株)製)を用いた。
評価基準:
○:5g以上。
×:5g未満。
(5) Workability Assuming the actual line environment for workability, the tip diameter of the coating gun is 1.2mm through 40 × 1 airless pump, regulator, high pressure hose 3/4 inch × 3m, 3/8 inch × 3m It evaluated from the discharge amount from the tip nozzle. The regulator was adjusted so that the pressure in the hose was 8 MPa so that the temperature of the material was stabilized at 23 ° C. during the test. The test was carried out for 10 consecutive cycles, with 10 seconds of discharge and 50 seconds of rest as one cycle, and the discharge amount of each cycle was averaged. The sealer pump used was model 840-513, the regulator used model 903-958, the gun used model 235-627, and the tip nozzle used a model 300N082 (manufactured by Graco Co., Ltd.) with a tip diameter of 1.2 mm.
Evaluation criteria:
○: 5 g or more.
X: Less than 5 g.

Figure 2010189542
Figure 2010189542

表2に示した如く、実施例1では、耐湿養生して加熱硬化後の発泡が抑制され、剪断強度の低下も抑えることができた。また、実施例2〜5のように、エポキシ樹脂の分子量・配合比を変化させても同様の効果が得られた。これにより、CKD輸送に適用できることが確認された。   As shown in Table 2, in Example 1, moisture curing was performed and foaming after heat curing was suppressed, and a decrease in shear strength could be suppressed. Moreover, the same effect was acquired even if it changed the molecular weight and the compounding ratio of the epoxy resin like Examples 2-5. This confirmed that it can be applied to CKD transport.

一方、表2に示した如く、比較例1では、耐湿養生して加熱硬化後に発泡してしまい、剪断強度は大幅に低下し、所望の性能を発揮できなかった。また、表2に示した如く、比較例2や比較例3のように、分子量の大きいエポキシ樹脂の配合比が大きかったり、エポキシ樹脂の分子量が大きくなりすぎると、製造が困難になるばかりでなく、接着剤の粘度が大幅に上昇し、従来の接着剤に比べて作業性が大きく損なわれてしまった。これにより、CKD輸送には適さないことが確認された。   On the other hand, as shown in Table 2, in Comparative Example 1, foaming was performed after heat curing and heat-curing, the shear strength was greatly reduced, and the desired performance could not be exhibited. Further, as shown in Table 2, as in Comparative Example 2 and Comparative Example 3, when the blending ratio of the epoxy resin having a large molecular weight is large or the molecular weight of the epoxy resin is excessively large, the production becomes difficult. The viscosity of the adhesive is greatly increased, and the workability is greatly impaired as compared with the conventional adhesive. This confirmed that it was not suitable for CKD transport.

Claims (1)

CKD輸送に対応したヘミング接着剤であって、
(A)数平均分子量300以上500以下の第1のエポキシ樹脂、
(B)数平均分子量800以上4000以下の第2のエポキシ樹脂、
(C)硬化剤、
(D)酸化カルシウム、及び
(E)充填材、
を含有し、
前記第1のエポキシ樹脂(A)100質量部に対し、前記第2のエポキシ樹脂(B)を1〜50質量部配合することを特徴とするCKD輸送対応ヘミング接着剤。
A hemming adhesive for CKD transport,
(A) a first epoxy resin having a number average molecular weight of 300 to 500,
(B) a second epoxy resin having a number average molecular weight of 800 to 4000,
(C) a curing agent,
(D) calcium oxide, and (E) a filler,
Containing
1 to 50 parts by mass of the second epoxy resin (B) is blended with 100 parts by mass of the first epoxy resin (A).
JP2009035027A 2009-02-18 2009-02-18 Hemming adhesive corresponding to ckd transportation Pending JP2010189542A (en)

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