JP2017155185A - Chloroprene rubber-based adhesive - Google Patents
Chloroprene rubber-based adhesive Download PDFInfo
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- JP2017155185A JP2017155185A JP2016042183A JP2016042183A JP2017155185A JP 2017155185 A JP2017155185 A JP 2017155185A JP 2016042183 A JP2016042183 A JP 2016042183A JP 2016042183 A JP2016042183 A JP 2016042183A JP 2017155185 A JP2017155185 A JP 2017155185A
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- chloroprene rubber
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Abstract
Description
本発明は、クロロプレンゴム系接着剤に関するものであり、より詳しくは芳香族炭化水素系溶剤を用いなくても接着強度が良好なクロロプレンゴム系接着剤に関するものである。 The present invention relates to a chloroprene rubber adhesive, and more particularly to a chloroprene rubber adhesive having good adhesive strength without using an aromatic hydrocarbon solvent.
クロロプレンゴム等をベースとした溶剤系接着剤は、その良好な作業性や接着物性から各種用途に用いられてきた。そのため、数多くのクロロプレン系接着剤が開発されている。これらのクロロプレンゴム系接着剤は、原料ゴムおよびその他の配合剤をトルエン、シクロヘキサン、アセトンなどの有機溶剤に溶解させているものがほとんどである（例えば、特許文献１〜３参照。）。 Solvent-based adhesives based on chloroprene rubber and the like have been used for various applications because of their good workability and adhesive properties. Therefore, many chloroprene adhesives have been developed. Most of these chloroprene rubber-based adhesives are obtained by dissolving raw rubber and other compounding agents in an organic solvent such as toluene, cyclohexane, and acetone (for example, see Patent Documents 1 to 3).
一方で、シックハウス症候群への対応として、ホルマリンや、トルエン、キシレンの使用ができなくなり、トルエン不含のクロロプレンゴム系接着剤が市場では要望されている。 On the other hand, as a response to sick house syndrome, formalin, toluene, and xylene cannot be used, and a toluene-free chloroprene rubber adhesive is demanded in the market.
トルエン不含のクロロプレンゴム系接着剤としては、例えば特許文献４、５など、代替溶剤をもちいるものが挙げられるが、クロロプレンゴムを単独では溶解しない溶剤をもちいているため、接着剤物性が劣るという問題があった。 Examples of toluene-free chloroprene rubber-based adhesives include those using alternative solvents such as Patent Documents 4 and 5, but the adhesive physical properties are inferior because a solvent that does not dissolve chloroprene rubber alone is used. There was a problem.
本発明はこの問題点に鑑みてなされたものであり、接着物性に優れたクロロプレンゴム系接着剤を提供するものである The present invention has been made in view of this problem, and provides a chloroprene rubber adhesive having excellent adhesive properties.
本発明者は、このような背景の下、上記課題を解決するため鋭意検討した結果、−１０℃において４時間後の硬さ（ショアＡ）上昇が１０ポイント以上であり、トルエンに１０％濃度で溶解させた場合の粘度が１２００ｍＰａ・ｓ以上２３００ｍＰａ・ｓ以下であるクロロプレンゴムを用いることで、クロプレン系接着剤の接着物性を向上することを知見し、本発明を完成させるに至った。 As a result of intensive studies to solve the above-mentioned problems, the present inventor has found that the increase in hardness (Shore A) after 4 hours at −10 ° C. is 10 points or more, and a 10% concentration in toluene. It was found that the use of a chloroprene rubber having a viscosity of 1200 mPa · s or more and 2300 mPa · s or less when dissolved in the above improves the adhesive properties of the cloprene-based adhesive, thereby completing the present invention.
すなわち本発明は、−１０℃において４時間後の硬さ（ショアＡ）上昇が１０ポイント以上であり、トルエンに１０％濃度で溶解させた場合の粘度が１２００ｍＰａ・ｓ以上２３００ｍＰａ・ｓ以下であるクロロプレンゴムと芳香族炭化水素系溶剤を２０％以下含むクロロプレンゴム系接着剤である。 That is, in the present invention, the increase in hardness (Shore A) after 4 hours at −10 ° C. is 10 points or more, and the viscosity when dissolved in toluene at a concentration of 10% is 1200 mPa · s or more and 2300 mPa · s or less. A chloroprene rubber adhesive containing 20% or less of chloroprene rubber and aromatic hydrocarbon solvent.
本発明のクロロプレンゴム系接着剤は、トルエンなどの芳香族炭化水素系溶剤を用いなくても、接着物性と安定性に優れる接着剤を提供することができる。 The chloroprene rubber adhesive of the present invention can provide an adhesive having excellent adhesive properties and stability without using an aromatic hydrocarbon solvent such as toluene.
以下、本発明について、詳細に説明する。 Hereinafter, the present invention will be described in detail.
本発明のクロロプレンゴムは、２−クロロ−１，３−ブタジエンであるクロロプレンの単量体を単独で重合して得られたもの、または、クロロプレンと共重合可能な１種類以上の単量体を用いて重合して得られたものであるである。 The chloroprene rubber of the present invention is obtained by polymerizing a monomer of chloroprene which is 2-chloro-1,3-butadiene alone, or one or more monomers copolymerizable with chloroprene. And obtained by polymerization.
クロロプレンと共重合可能な単量体としては、例えば、２，３−ジクロロ−１，３−ブタジエン、アクリロニトリル、メチルメタクリレート、ヒドロキシエチルメタクリレート、メタクリル酸等があげられる。 Examples of the monomer copolymerizable with chloroprene include 2,3-dichloro-1,3-butadiene, acrylonitrile, methyl methacrylate, hydroxyethyl methacrylate, and methacrylic acid.
本発明のクロロプレンゴムは、−１０℃において４時間後の硬さ（ショアＡ）上昇が１０ポイント以上である。硬さの測定はＪＩＳ Ｋ６２５３記載のタイプＡデュロメーターまたは旧ＪＩＳ６３０１に記載のあったスプリング式ＪＩＳ−Ａ型を用い、１秒後の値を用いた。測定は３点行いその平均値を採用するが、バラつきが大きい場合は５点とし、上下の２点を除去した後に３点を平均した。これを満たさない場合は耐水接着強さが低下する。また、上記を満たすように硬さ上昇時間の異なる２種類以上のゴムをブレンドして使用しても構わない。また、本発明のクロロプレンゴムはトルエンに１０％濃度で溶解させた場合の粘度が１２００ｍＰａ・ｓ以上２３００ｍＰａ・ｓ以下のものであり、これよりも低い粘度の場合は高温接着強さが低下し、これよりも高い粘度の場合は初期接着強さが低下する。また、上記粘度範囲を満たすよう、２種類以上のゴムをブレンドして用いても構わない。 The chloroprene rubber of the present invention has a hardness (Shore A) increase of 10 points or more after 4 hours at -10 ° C. The hardness was measured using a type A durometer described in JIS K6253 or a spring type JIS-A type described in old JIS6301 and the value after 1 second was used. The measurement was performed at three points, and the average value was adopted. However, when the variation was large, the number was set to five points, and after removing the upper and lower two points, the three points were averaged. When this is not satisfied, the water-resistant adhesive strength is lowered. Further, two or more kinds of rubbers having different hardness rise times may be blended and used so as to satisfy the above. Moreover, the chloroprene rubber of the present invention has a viscosity of 1200 mPa · s or more and 2300 mPa · s or less when dissolved in toluene at a concentration of 10%, and in the case of a viscosity lower than this, the high-temperature adhesive strength decreases, When the viscosity is higher than this, the initial adhesive strength decreases. Further, two or more kinds of rubbers may be blended and used so as to satisfy the above viscosity range.
溶剤としては、芳香族炭化水素系溶剤、エステル系溶剤、脂肪族炭化水素系溶剤及び芳香族炭化水素系溶剤からなる群より選ばれる１つ以上の溶剤を使用する事が可能である。エステル系溶剤としては、アセトン、エチルアセテート、ＭＥＫ（メチルエチルケトン）等、脂肪族炭化水素系溶剤としては、ノルマルヘキサン、シクロヘキサン等、芳香族炭化水素系溶剤としては、トルエン、キシレン等が挙げられる。しかし、近年のシックハウス症候群への対応として、芳香族炭化水素系溶剤は溶剤全体の２０重量％以であり、芳香族炭化系溶剤を含まないことが好ましい。トルエンやキシレンなどの芳香族炭化水素系溶剤が使用できない場合は、エステル系溶剤や脂肪族炭化水素溶剤を組み合わせて使用することができる。 As the solvent, it is possible to use one or more solvents selected from the group consisting of aromatic hydrocarbon solvents, ester solvents, aliphatic hydrocarbon solvents, and aromatic hydrocarbon solvents. Examples of the ester solvent include acetone, ethyl acetate, and MEK (methyl ethyl ketone). Examples of the aliphatic hydrocarbon solvent include normal hexane and cyclohexane. Examples of the aromatic hydrocarbon solvent include toluene and xylene. However, as a countermeasure to the recent sick house syndrome, the aromatic hydrocarbon solvent is preferably 20% by weight or more of the total solvent, and preferably does not contain the aromatic hydrocarbon solvent. When an aromatic hydrocarbon solvent such as toluene or xylene cannot be used, an ester solvent or an aliphatic hydrocarbon solvent can be used in combination.
本発明のクロロプレンゴム系接着剤は、その他に、一般的に用いられる金属酸化物や粘着付与樹脂、老化防止剤等を含ませることができる。金属酸化物としては酸化マグネシウムや酸化亜鉛が一般的には多く用いられ、粘着付与樹脂としては、アルキルフェノール樹脂や、テルペンフェノール樹脂などが用いられることが多い。 In addition, the chloroprene rubber adhesive of the present invention can contain metal oxides, tackifying resins, anti-aging agents and the like that are generally used. Magnesium oxide and zinc oxide are generally used as metal oxides, and alkylphenol resins and terpene phenol resins are often used as tackifier resins.
本発明のクロロプレンゴム系接着剤は、例えば、クロロプレンゴム、酸化マグネシウム、酸化亜鉛、アルキルフェノール樹脂などと共に、上記溶剤に混合し、撹拌して溶解させることで作成できる。 The chloroprene rubber adhesive of the present invention can be prepared by, for example, mixing with chloroprene rubber, magnesium oxide, zinc oxide, alkylphenol resin and the like in the above solvent, stirring and dissolving.
以下、本発明を実施例にて具体的に説明する。
クロロプレンゴム系接着剤は下記に示す手法で作製・評価を行った。
Hereinafter, the present invention will be specifically described with reference to Examples.
The chloroprene rubber adhesive was prepared and evaluated by the following method.
＜硬さ上昇測定＞
クロロプレンゴムを８インチオープンロールに間隙１．４ｍｍにて１０回パスさせた後、５ｃｍ×３ｃｍ、厚み１ｃｍの金型にて９０℃でプレス成型し、室温にて１時間以上放冷後に−１０℃雰囲気下に静置。１０分後の硬さ（デュロメーターＡ）を開始（０分）として、４時間後の硬さ上昇を測定した。
<Measurement of hardness rise>
Chloroprene rubber was passed through an 8-inch open roll 10 times with a gap of 1.4 mm, pressed with a 5 cm × 3 cm, 1 cm thick mold at 90 ° C., allowed to cool at room temperature for 1 hour or more, and then −10 Leave in a ℃ atmosphere. Starting from the hardness after 10 minutes (durometer A) (0 minutes), the increase in hardness after 4 hours was measured.
＜接着剤の作製＞
接着剤は、表１に記載の配合剤および溶剤を所定量瓶に投入し、密栓したうえでボールミル架台にて室温下にて４８時間回転・混合させることで作製した。
<Preparation of adhesive>
Adhesives were prepared by putting predetermined amounts of the compounding agents and solvents shown in Table 1 into bottles, sealing them, and rotating and mixing them at room temperature on a ball mill stand for 48 hours.
＜接着試験片作製＞
９号帆布２枚（約１５０ｍｍ×６０ｍｍ）それぞれの片面に、作製した接着剤を刷毛で約２３０ｇ／ｍ２塗布し、８０℃にて５分間乾燥した。室温で３０分放冷した後、再度接着剤を刷毛にて約９０ｇ／ｍ２塗布し、８０℃にて５分乾燥直後、もしくは、その後６０分放冷した後にハンドローラーを用いて圧着した。１５０ｍｍ×２５ｍｍのサイズに切り出したものを測定用の試験片とした。
<Preparation of adhesion test piece>
About 230 g / m 2 of the prepared adhesive was applied to one side of each of No. 9 canvas (about 150 mm × 60 mm) with a brush and dried at 80 ° C. for 5 minutes. After allowing to cool at room temperature for 30 minutes, the adhesive was applied again with a brush at about 90 g / m 2 and dried at 80 ° C. for 5 minutes, or then allowed to cool for 60 minutes and then pressure-bonded using a hand roller. A test piece for measurement was cut into a size of 150 mm × 25 mm.
＜接着強さ＞
圧着２分後にテンシロン型引っ張り試験機を用いて１００ｍｍ／ｍｉｎの剥離速度で１８０°方向の引っ張りにて行った。
<Adhesive strength>
Two minutes after the pressing, the tensile test was performed in a 180 ° direction at a peeling rate of 100 mm / min using a Tensilon type tensile tester.
＜高温接着強さ＞
接着３日後に、試験片を８０℃雰囲気下にて５分間状態調整を実施し、テンシロン型引っ張り試験機を用いて８０℃の雰囲気下にて１００ｍｍ／ｍｉｎの剥離速度で１８０°方向の引っ張りにて行った。
<High temperature adhesive strength>
After 3 days of bonding, the test piece was conditioned for 5 minutes in an 80 ° C. atmosphere and pulled in a 180 ° direction at a peeling rate of 100 mm / min in an 80 ° C. atmosphere using a Tensilon type tensile tester. I went.
＜耐水接着強さ＞
接着１日後に、試験片を純水に浸漬し、２３℃雰囲気下にて1週間静置した後にテンシロン型引っ張り試験機を用いて８０℃の雰囲気下にて１００ｍｍ／ｍｉｎの剥離速度で１８０°方向の引っ張りにて行った。
<Water-resistant adhesive strength>
One day after bonding, the test piece was immersed in pure water and allowed to stand for 1 week in a 23 ° C. atmosphere, and then 180 ° at a peeling rate of 100 mm / min in an 80 ° C. atmosphere using a Tensilon type tensile tester. It was done by pulling in the direction.
実施例１〜６、比較例１〜５
実施例１〜６、比較例１〜５の結果を表１に示す。
Examples 1-6, Comparative Examples 1-5
The results of Examples 1 to 6 and Comparative Examples 1 to 5 are shown in Table 1.
実施例では良好な安定性と接着強さが得られたことが分かる。 It can be seen that good stability and adhesive strength were obtained in the examples.
本発明のクロロプレンゴム系接着剤は、家具、木工、建材など、広範囲の材料の接着分野で使用される。 The chloroprene rubber adhesive of the present invention is used in the bonding field of a wide range of materials such as furniture, woodwork, and building materials.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016042183A JP2017155185A (en) | 2016-03-04 | 2016-03-04 | Chloroprene rubber-based adhesive |
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| JP2016042183A JP2017155185A (en) | 2016-03-04 | 2016-03-04 | Chloroprene rubber-based adhesive |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63245449A (en) * | 1987-04-01 | 1988-10-12 | Denki Kagaku Kogyo Kk | Chloroprene rubber composition for vibration insulating rubber |
| JP2000017112A (en) * | 1998-07-03 | 2000-01-18 | Tosoh Corp | Chloroprene rubber composition and support using the same |
| JP2003226852A (en) * | 2002-02-04 | 2003-08-15 | Aica Kogyo Co Ltd | Chloroprene-based adhesive composition |
| JP2005154744A (en) * | 2003-11-06 | 2005-06-16 | Denki Kagaku Kogyo Kk | Chloroprene rubber adhesive and its manufacturing method |
| JP2009173891A (en) * | 2007-12-27 | 2009-08-06 | Denki Kagaku Kogyo Kk | Method for producing chloroprene rubber composition, chloroprene rubber composition, and adhesive using the same |
| JP2010275338A (en) * | 2009-05-26 | 2010-12-09 | Denki Kagaku Kogyo Kk | Chloroprene rubber composition and adhesive using the same |
-
2016
- 2016-03-04 JP JP2016042183A patent/JP2017155185A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63245449A (en) * | 1987-04-01 | 1988-10-12 | Denki Kagaku Kogyo Kk | Chloroprene rubber composition for vibration insulating rubber |
| JP2000017112A (en) * | 1998-07-03 | 2000-01-18 | Tosoh Corp | Chloroprene rubber composition and support using the same |
| JP2003226852A (en) * | 2002-02-04 | 2003-08-15 | Aica Kogyo Co Ltd | Chloroprene-based adhesive composition |
| JP2005154744A (en) * | 2003-11-06 | 2005-06-16 | Denki Kagaku Kogyo Kk | Chloroprene rubber adhesive and its manufacturing method |
| JP2009173891A (en) * | 2007-12-27 | 2009-08-06 | Denki Kagaku Kogyo Kk | Method for producing chloroprene rubber composition, chloroprene rubber composition, and adhesive using the same |
| JP2010275338A (en) * | 2009-05-26 | 2010-12-09 | Denki Kagaku Kogyo Kk | Chloroprene rubber composition and adhesive using the same |
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