JP2011063672A - Chloroprene rubber latex adhesive composition - Google Patents
Chloroprene rubber latex adhesive composition Download PDFInfo
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- JP2011063672A JP2011063672A JP2009213916A JP2009213916A JP2011063672A JP 2011063672 A JP2011063672 A JP 2011063672A JP 2009213916 A JP2009213916 A JP 2009213916A JP 2009213916 A JP2009213916 A JP 2009213916A JP 2011063672 A JP2011063672 A JP 2011063672A
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- rubber latex
- chloroprene rubber
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- 239000004816 latex Substances 0.000 title claims abstract description 43
- 229920001084 poly(chloroprene) Polymers 0.000 title claims abstract description 43
- 239000000853 adhesive Substances 0.000 title claims abstract description 32
- 230000001070 adhesive effect Effects 0.000 title claims abstract description 32
- 239000000203 mixture Substances 0.000 title claims abstract description 24
- -1 carbodiimide compound Chemical class 0.000 claims abstract description 21
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- 229910052751 metal Inorganic materials 0.000 claims description 4
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- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 239000000758 substrate Substances 0.000 abstract description 6
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- QZCLKYGREBVARF-UHFFFAOYSA-N Acetyl tributyl citrate Chemical compound CCCCOC(=O)CC(C(=O)OCCCC)(OC(C)=O)CC(=O)OCCCC QZCLKYGREBVARF-UHFFFAOYSA-N 0.000 description 1
- 240000000972 Agathis dammara Species 0.000 description 1
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- 239000004859 Copal Substances 0.000 description 1
- 229920002871 Dammar gum Polymers 0.000 description 1
- MQIUGAXCHLFZKX-UHFFFAOYSA-N Di-n-octyl phthalate Natural products CCCCCCCCOC(=O)C1=CC=CC=C1C(=O)OCCCCCCCC MQIUGAXCHLFZKX-UHFFFAOYSA-N 0.000 description 1
- XTJFFFGAUHQWII-UHFFFAOYSA-N Dibutyl adipate Chemical compound CCCCOC(=O)CCCCC(=O)OCCCC XTJFFFGAUHQWII-UHFFFAOYSA-N 0.000 description 1
- PYGXAGIECVVIOZ-UHFFFAOYSA-N Dibutyl decanedioate Chemical compound CCCCOC(=O)CCCCCCCCC(=O)OCCCC PYGXAGIECVVIOZ-UHFFFAOYSA-N 0.000 description 1
- VIZORQUEIQEFRT-UHFFFAOYSA-N Diethyl adipate Chemical compound CCOC(=O)CCCCC(=O)OCC VIZORQUEIQEFRT-UHFFFAOYSA-N 0.000 description 1
- UDSFAEKRVUSQDD-UHFFFAOYSA-N Dimethyl adipate Chemical compound COC(=O)CCCCC(=O)OC UDSFAEKRVUSQDD-UHFFFAOYSA-N 0.000 description 1
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- 241000782205 Guibourtia conjugata Species 0.000 description 1
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- 229920001800 Shellac Polymers 0.000 description 1
- 229920004411 Skyprene® Polymers 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 125000002723 alicyclic group Chemical group 0.000 description 1
- 125000001931 aliphatic group Chemical group 0.000 description 1
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- 239000002518 antifoaming agent Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- XTTFBGOZENFIAM-UHFFFAOYSA-N bis(2-ethylhexyl) (Z)-but-2-enedioate dibutyl (Z)-but-2-enedioate Chemical compound C(C=C/C(=O)OCCCC)(=O)OCCCC.C(C=C/C(=O)OCC(CCCC)CC)(=O)OCC(CCCC)CC XTTFBGOZENFIAM-UHFFFAOYSA-N 0.000 description 1
- MTPSFISGWJGUGN-UHFFFAOYSA-N bis(2-ethylhexyl) dodecanedioate Chemical compound CCCCC(CC)COC(=O)CCCCCCCCCCC(=O)OCC(CC)CCCC MTPSFISGWJGUGN-UHFFFAOYSA-N 0.000 description 1
- ZDWGXBPVPXVXMQ-UHFFFAOYSA-N bis(2-ethylhexyl) nonanedioate Chemical compound CCCCC(CC)COC(=O)CCCCCCCC(=O)OCC(CC)CCCC ZDWGXBPVPXVXMQ-UHFFFAOYSA-N 0.000 description 1
- BJQHLKABXJIVAM-UHFFFAOYSA-N bis(2-ethylhexyl) phthalate Chemical compound CCCCC(CC)COC(=O)C1=CC=CC=C1C(=O)OCC(CC)CCCC BJQHLKABXJIVAM-UHFFFAOYSA-N 0.000 description 1
- RSRICHZMFPHXLE-AATRIKPKSA-N bis(2-methylpropyl) (e)-but-2-enedioate Chemical compound CC(C)COC(=O)\C=C\C(=O)OCC(C)C RSRICHZMFPHXLE-AATRIKPKSA-N 0.000 description 1
- 229910000019 calcium carbonate Inorganic materials 0.000 description 1
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- 239000011248 coating agent Substances 0.000 description 1
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- 238000004132 cross linking Methods 0.000 description 1
- JBSLOWBPDRZSMB-BQYQJAHWSA-N dibutyl (e)-but-2-enedioate Chemical compound CCCCOC(=O)\C=C\C(=O)OCCCC JBSLOWBPDRZSMB-BQYQJAHWSA-N 0.000 description 1
- 229940100539 dibutyl adipate Drugs 0.000 description 1
- FBSAITBEAPNWJG-UHFFFAOYSA-N dimethyl phthalate Natural products CC(=O)OC1=CC=CC=C1OC(C)=O FBSAITBEAPNWJG-UHFFFAOYSA-N 0.000 description 1
- 229960001826 dimethylphthalate Drugs 0.000 description 1
- VJHINFRRDQUWOJ-UHFFFAOYSA-N dioctyl sebacate Chemical compound CCCCC(CC)COC(=O)CCCCCCCCC(=O)OCC(CC)CCCC VJHINFRRDQUWOJ-UHFFFAOYSA-N 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
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- 229920001971 elastomer Polymers 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
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- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- FLESAADTDNKLFJ-UHFFFAOYSA-N nickel;pentane-2,4-dione Chemical compound [Ni].CC(=O)CC(C)=O FLESAADTDNKLFJ-UHFFFAOYSA-N 0.000 description 1
- 150000002918 oxazolines Chemical class 0.000 description 1
- WATYAKBWIQTPDE-UHFFFAOYSA-N pentane-2,4-dione;zinc Chemical compound [Zn].CC(=O)CC(C)=O WATYAKBWIQTPDE-UHFFFAOYSA-N 0.000 description 1
- 239000003209 petroleum derivative Substances 0.000 description 1
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- ZLGIYFNHBLSMPS-ATJNOEHPSA-N shellac Chemical compound OCCCCCC(O)C(O)CCCCCCCC(O)=O.C1C23[C@H](C(O)=O)CCC2[C@](C)(CO)[C@@H]1C(C(O)=O)=C[C@@H]3O ZLGIYFNHBLSMPS-ATJNOEHPSA-N 0.000 description 1
- 229940113147 shellac Drugs 0.000 description 1
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- 239000003381 stabilizer Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
Landscapes
- Adhesives Or Adhesive Processes (AREA)
Abstract
Description
本発明は、クロロプレンゴムラテックス接着剤組成物の耐熱性の改良に関するものである。 The present invention relates to an improvement in heat resistance of a chloroprene rubber latex adhesive composition.
クロロプレンゴムラテックスは水系であるため安全性が高く、コンタクト性を有し初期接着力に優れるという特徴がある。そこで、例えば従来溶剤ゴム系接着剤が使用されていた分野などにおいて、溶剤を使用しない環境対応型の接着剤としてクロロプレンゴムラテックスをベースとした接着剤への置換えが行われている。 Since chloroprene rubber latex is water-based, it is highly safe, has contact properties and excellent initial adhesive strength. Therefore, for example, in the field where solvent rubber adhesives are conventionally used, replacement with an adhesive based on chloroprene rubber latex as an environmentally friendly adhesive without using a solvent is performed.
また、素材分野においても環境への負荷が少ない材料への置換えが進んでおり、例えば塩化ビニル樹脂は汎用樹脂として様々な分野で用いられてきたが、焼却時に有害な塩素化合物を発生するおそれがあることから、ポリオレフィン樹脂などへ置換えられている。一方、ポリオレフィン樹脂は極性が低く難接着性材料として知られているが、前述のように接着剤が溶剤系から水系に置き換えられている状況において、水系接着剤での接着はさらに難易度が高かった。 In the field of raw materials, replacement with a material having a low environmental impact is progressing. For example, vinyl chloride resin has been used as a general-purpose resin in various fields, but it may generate harmful chlorine compounds during incineration. For this reason, it has been replaced with polyolefin resin. On the other hand, polyolefin resin is known as a low-polarity and low-adhesion material, but in the situation where the adhesive is replaced from solvent-based to water-based as described above, adhesion with water-based adhesive is even more difficult. It was.
特許文献１には、特定のゲル含有率であるクロロプレンゴムラテックスを用いることによって耐熱クリープ性能を向上させた接着剤組成物が開示されているが、初期強度や常態剥離強度において改善の余地があった。また、本発明者らは特許文献２において、初期強度、常態剥離強度、耐熱性に優れ、特にポリオレフィン基材の接着性に優れるクロロプレンゴムラテックス接着剤組成物を提案しているが、用途によってはさらに高度の耐熱性が求められていた。
本発明の課題は初期強度、常態剥離強度、ポリオレフィン基材の接着性に優れ、高度の耐熱性を有するクロロプレンゴムラテックス接着剤組成物を提供することである。 An object of the present invention is to provide a chloroprene rubber latex adhesive composition that is excellent in initial strength, normal peel strength, polyolefin substrate adhesion, and has high heat resistance.
本発明は、ロジン酸塩系活性剤を使用して合成されたクロロプレンゴムラテックス（ａ）、分子内にカルボキシル基または水酸基を有するクロロプレンゴムラテックス（ｂ）、カルボジイミド化合物を含有することを特徴とするクロロプレンゴムラテックス接着剤組成物である。 The present invention comprises a chloroprene rubber latex (a) synthesized using a rosinate-based activator, a chloroprene rubber latex (b) having a carboxyl group or a hydroxyl group in the molecule, and a carbodiimide compound. A chloroprene rubber latex adhesive composition.
本発明のクロロプレンゴムラテックス接着剤組成物は初期強度、常態剥離強度、ポリオレフィン基材への密着性に優れ、高度の耐熱性を有している。したがって、少なくとも一方の被着体がポリオレフィンであり、高度の耐熱性が要求される接着用途、例えば自動車内装材として使用されるポリオレフィン基材とファブリックなどのクロスなどの接着用として有用である。 The chloroprene rubber latex adhesive composition of the present invention is excellent in initial strength, normal peel strength, adhesion to a polyolefin substrate, and has high heat resistance. Therefore, at least one of the adherends is a polyolefin, and is useful for bonding applications requiring a high degree of heat resistance, for example, bonding of a polyolefin substrate used as an automobile interior material and a cloth cloth.
本発明の接着剤組成物は、異なる特徴を有する２種のクロロプレンゴムラテックスを含有することを特徴とする。クロロプレンゴムラテックス（ａ）は、ロジン酸塩系活性剤を使用して合成されたことを特徴とし、ゲル含有率は０〜２０重量％が好ましく、０〜５重量％がより好ましい。また、クロロプレンゴムラテックス（ｂ）は、分子内にカルボキシル基または水酸基を有することを特徴とし、ゲル含有率は３０〜１００重量％が好ましく、５０〜８０重量％がより好ましい。初期強度、常態剥離強度、耐熱性の各性能をバランス良く成立させるため、クロロプレンゴムラテックス（ａ）１００重量部に対して、クロロプレンゴムラテックス（ｂ）を１０〜５０００重量部用いることが好ましく、５０〜１
５０重量部用いることがより好ましい。
The adhesive composition of the present invention is characterized by containing two types of chloroprene rubber latex having different characteristics. The chloroprene rubber latex (a) is characterized by being synthesized using a rosinate-based activator, and the gel content is preferably 0 to 20% by weight, and more preferably 0 to 5% by weight. The chloroprene rubber latex (b) has a carboxyl group or a hydroxyl group in the molecule, and the gel content is preferably 30 to 100% by weight, and more preferably 50 to 80% by weight. In order to establish each performance of initial strength, normal peel strength, and heat resistance in a well-balanced manner, it is preferable to use 10 to 5000 parts by weight of chloroprene rubber latex (b) with respect to 100 parts by weight of chloroprene rubber latex (a). ~ 1
It is more preferable to use 50 parts by weight.
クロロプレンゴムラテックスのゲル含有率は以下の方法により測定する。クロロプレンゴムラテックスにメタノールを添加して凝集させ、さらに真空乾燥することによりメタノールを除去し、凝集物を得る。凝集物を２日間トルエンに浸漬し、２００メッシュ（目開き０．０７５ｍｍ）に通し、メッシュ上に残ったもの真空乾燥することによりトルエンを除去し、ゲルを得る。ゲルの重量と凝集物の重量の比からゲル含有率を求める。なお、架橋進行防止のため、トルエン浸漬は冷暗所にて行う。 The gel content of chloroprene rubber latex is measured by the following method. Methanol is added to the chloroprene rubber latex for agglomeration and further vacuum dried to remove the methanol and obtain an agglomerate. The agglomerate is immersed in toluene for 2 days, passed through 200 mesh (aperture 0.075 mm), and what remains on the mesh is vacuum dried to remove toluene and obtain a gel. The gel content is determined from the ratio between the weight of the gel and the weight of the aggregate. In addition, in order to prevent crosslinking, toluene immersion is performed in a cool and dark place.
本発明のクロロプレンゴムラテックス接着剤組成物は架橋剤としてカルボジイミド化合物を含有する。カルボジイミド化合物を用いることにより、イソシアネート化合物やオキサゾリン化合物等の他の架橋剤を用いた場合よりも高度の耐熱性を得ることができる。カルボジイミド化合物の市販品の例として、商品名カルボジライト（日清紡ケミカル社製）等が挙げられる。カルボジイミド化合物の配合量は、クロロプレンゴムラテックス（ａ）とクロロプレンゴムラテックス（ｂ）の合計１００重量部に対して、１〜２０重量部が好ましい。 The chloroprene rubber latex adhesive composition of the present invention contains a carbodiimide compound as a crosslinking agent. By using a carbodiimide compound, higher heat resistance can be obtained than when other crosslinking agents such as isocyanate compounds and oxazoline compounds are used. As an example of a commercially available carbodiimide compound, trade name Carbodilite (manufactured by Nisshinbo Chemical Co., Ltd.) and the like can be mentioned. The compounding amount of the carbodiimide compound is preferably 1 to 20 parts by weight with respect to a total of 100 parts by weight of the chloroprene rubber latex (a) and the chloroprene rubber latex (b).
本発明の接着剤組成物は、前記クロロプレンゴムラテックス２種およびカルボジイミド化合物に加えて各種添加剤を用いることができる。特に初期強度、常態剥離強度、耐熱性をさらに向上させたり、ポリオレフィン基材に対する密着性を向上させるため、クロロプレンゴムラテックス（ａ）とクロロプレンゴムラテックス（ｂ）の合計１００重量部に対して、粘着付与樹脂１〜１００重量部、塩素化ポリオレフィン樹脂１〜５０重量部、可塑剤１〜５０重量部、 アセチルアセトン金属塩０．１〜１０重量部を用いることが好ましい。 In the adhesive composition of the present invention, various additives can be used in addition to the two types of chloroprene rubber latex and the carbodiimide compound. In particular, in order to further improve the initial strength, normal peel strength, and heat resistance, or to improve the adhesion to the polyolefin substrate, the adhesive to 100 parts by weight of the total of chloroprene rubber latex (a) and chloroprene rubber latex (b). It is preferable to use 1 to 100 parts by weight of an imparting resin, 1 to 50 parts by weight of a chlorinated polyolefin resin, 1 to 50 parts by weight of a plasticizer, and 0.1 to 10 parts by weight of an acetylacetone metal salt.
粘着付与樹脂の具体例として、ガムロジン、トールロジン、ウッドロジン、不均斉化ロジン、重合ロジン、これらロジンのグリセリンエステルやペンタエリスリトールエステル、これらの水素添加物などのロジン系樹脂、テルペン樹脂、炭化水素変性テルペン樹脂、これらの水素添加物などのテルペン系樹脂、テルペンフェノール樹脂、テルペンフェノール樹脂の水素添加物などのテルペンフェノール系樹脂、脂肪族系石油樹脂、脂環族系石油樹脂、芳香族系石油樹脂、共重合系石油樹脂、ジシクロペンタジエン系石油樹脂、ピュアーモノマー系石油樹脂、これらの水素添加物などの石油系樹脂、スチレン系樹脂、クマロンインデン系樹脂、アルキルフェノール系樹脂、キシレン系樹脂、ダンマル、コーパル、シェラックなどが挙げられる。 Specific examples of tackifying resins include gum rosin, tall rosin, wood rosin, disproportionated rosin, polymerized rosin, rosin resins such as glycerin ester and pentaerythritol ester of these rosins, hydrogenated products thereof, terpene resins, hydrocarbon-modified terpenes Resins, terpene resins such as these hydrogenated products, terpene phenol resins, terpene phenol resins such as hydrogenated terpene phenol resins, aliphatic petroleum resins, alicyclic petroleum resins, aromatic petroleum resins, Copolymer petroleum resin, dicyclopentadiene petroleum resin, pure monomer petroleum resin, petroleum resins such as these hydrogenated products, styrene resin, coumarone indene resin, alkylphenol resin, xylene resin, dammar, Examples include copal and shellac.
塩素化ポリオレフィンとして、塩素化ポリエチレン、塩素化ポリプロピレンなどが挙げられ、カルボキシル基などの極性基を有するものでもよい。 Examples of the chlorinated polyolefin include chlorinated polyethylene and chlorinated polypropylene, which may have a polar group such as a carboxyl group.
可塑剤の具体例として、フタル酸ジメチル、フタル酸ジエチル、フタル酸ジブチル、フタル酸ジオクチル、フマル酸ジブチル、フマル酸ジイソブチル、アジピン酸ジメチル、アジピン酸ジエチル、アジピン酸ジブチル、アジピン酸オクチル、マレイン酸ジブチル、マレイン酸ビス（２−エチルヘキシル）、アゼライン酸ビス（２−エチルヘキシル）、セバシン酸ジブチル、セバシン酸ビス（２−エチルヘキシル）、ドデカン二酸ビス（２−エチルヘキシル）、アセチルクエン酸トリブチル、２，２，４−トリメチル−１，３−ペンタンジオールジイソブチレート、アロマオイルのような石油系炭化水素可塑剤などが挙げられる。 Specific examples of plasticizers include dimethyl phthalate, diethyl phthalate, dibutyl phthalate, dioctyl phthalate, dibutyl fumarate, diisobutyl fumarate, dimethyl adipate, diethyl adipate, dibutyl adipate, octyl adipate, dibutyl maleate Bis (2-ethylhexyl) maleate, bis (2-ethylhexyl) azelate, dibutyl sebacate, bis (2-ethylhexyl) sebacate, bis (2-ethylhexyl) dodecanedioate, tributyl acetyl citrate, 2,2 , 4-trimethyl-1,3-pentanediol diisobutyrate, petroleum hydrocarbon plasticizers such as aroma oil.
アセチルアセトン金属塩の具体例として、アセチルアセトン亜鉛塩、アセチルアセトンアルミニウム塩、アセチルアセトンニッケル塩、アセチルアセトン第二鉄塩などが挙げられる。 Specific examples of the acetylacetone metal salt include acetylacetone zinc salt, acetylacetone aluminum salt, acetylacetone nickel salt, and acetylacetone ferric salt.
本発明の接着剤組成物には前記各添加剤の他、炭酸カルシウムやシリカなどの無機充填材、老化防止剤、加硫促進剤、界面活性剤、防腐剤、消泡剤、分散剤、レベリング剤、凍結安定剤などを適宜配合できる。 In addition to the above additives, the adhesive composition of the present invention includes inorganic fillers such as calcium carbonate and silica, anti-aging agents, vulcanization accelerators, surfactants, preservatives, antifoaming agents, dispersants, and leveling. An agent, a freezing stabilizer and the like can be appropriately blended.
以下、実施例、比較例により本発明を更に説明する。また、当然のことながら本発明は実施例に制約されるものではない。 The present invention will be further described below with reference to examples and comparative examples. Of course, the present invention is not limited to the embodiments.
実施例１
クロロプレンゴムラテックス（ａ）としてスカイプレンＧＦＬ８９０（東ソー社製、商品名、ロジン酸塩系活性剤使用、ゲル含有率１重量％）５０重量部、クロロプレンゴムラテックス（ｂ）としてディスパコールＬＳ２３７２Ｈ（住化バイエルウレタン社製、商品名、分子内に水酸基を含有、ゲル含有率７５重量％）５０重量部、カルボジイミド化合物としてカルボジライトＳＶ−０２（日清紡ケミカル社製、商品名）５重量部、塩素化ポリオレフィンとしてＥＷ５３０３（東洋化成工業社製、商品名）３０重量部、粘着付与樹脂としてＥ２００ＮＴ（荒川化学工業社製、商品名）６０重量部、可塑剤としてＣＳ−１６（チッソ社製、商品名）１５重量部、アセチルアセトン金属塩としてナーセムＡｌ（日本化学産業社製、商品名）２重量部を添加し、実施例１の接着剤組成物を得た。
Example 1
Skyprene GFL890 (made by Tosoh Corporation, trade name, use of rosinate-based activator, 1% by weight of gel content) 50 parts by weight as chloroprene rubber latex (a), Dispacol LS2372H (Sumika) as chloroprene rubber latex (b) Made by Bayer Urethane Co., Ltd., trade name, containing hydroxyl group in the molecule, gel content 75% by weight) 50 parts by weight, carbodiimide compound as carbodilite SV-02 (made by Nisshinbo Chemical Co., Ltd., trade name), as chlorinated polyolefin EW5303 (manufactured by Toyo Kasei Kogyo Co., Ltd., trade name) 30 parts by weight, E200NT (made by Arakawa Chemical Co., trade name) as a tackifier resin, 60 parts by weight as a plasticizer, CS-16 (manufactured by Chisso Corporation, trade name) Part, Nathem Al (made by Nippon Kagaku Sangyo Co., Ltd., trade name) It was added to obtain an adhesive composition of Example 1.
実施例２〜４、比較例１〜４
実施例１で用いた配合材料の他、カルボジイミド化合物としてカルボジライトＶ０２−Ｌ２（日清紡ケミカル社製、商品名）、イソシアネート化合物としてＡＥ−１２８Ｈ（アイカ工業社製、商品名）、オキサゾリン化合物としてエポクロス２０１０Ｅ（日本触媒社製、商品名）を用い、表１記載の配合（重量部）にて各配合材料を混合し、各接着剤組成物を得た。
Examples 2-4, Comparative Examples 1-4
In addition to the compounding materials used in Example 1, carbodilite V02-L2 (trade name, manufactured by Nisshinbo Chemical Co., Ltd.) as the carbodiimide compound, AE-128H (trade name, manufactured by Aika Kogyo Co., Ltd.) as the isocyanate compound, and Epocross 2010E (trade name) as the oxazoline compound Using Nippon Shokubai Co., Ltd., trade name), each compounding material was mixed in the formulation (parts by weight) shown in Table 1 to obtain each adhesive composition.
各接着剤組成物をポリプロピレン板に塗布量２００ｇ／ｍ2でスプレー塗布し、８０℃で１５０秒間乾燥した。乾燥後、遠赤外線乾燥機にて１００℃で３０秒加熱した発泡ポリプロピレンシートをすぐに貼り合わせ、０．３ＭＰａで６０秒間圧締して接着体を得た。各接着体について、以下の方法で評価を行った。 Each adhesive composition was spray-coated on a polypropylene plate at a coating amount of 200 g / m 2 and dried at 80 ° C. for 150 seconds. After drying, a foamed polypropylene sheet heated at 100 ° C. for 30 seconds with a far-infrared dryer was immediately bonded, and pressed at 0.3 MPa for 60 seconds to obtain an adhesive. Each adhesive was evaluated by the following method.
試験評価方法
初期強度
接着体を作成後、すぐに２５ｍｍ幅に切断し、デジタルフォースゲージを用いて１８０°剥離強度を測定する。
常態強度
接着体を２３℃雰囲気下で１４日間養生後、２５ｍｍ幅に切断してデジタルフォースゲージを用いて１８０°剥離強度を測定する。
耐熱クリープ
接着体を２３℃雰囲気下で１４日間養生後、８０℃雰囲気下で１８０°方向に１００g／
２５ｍｍの荷重をかけ、２４時間後の剥離長さを測定する。
Test Evaluation Method Initial Strength Immediately after creating the bonded body, it is cut into a width of 25 mm and the 180 ° peel strength is measured using a digital force gauge.
Normal strength After the adhesive body was cured in a 23 ° C. atmosphere for 14 days, it was cut to a width of 25 mm, and the 180 ° peel strength was measured using a digital force gauge.
Heat-resistant creep After curing the bonded body in a 23 ° C. atmosphere for 14 days, 100 g / 180 ° in an 80 ° C. direction at 80 ° C.
A load of 25 mm is applied and the peel length after 24 hours is measured.
クロロプレンゴムラテックス（ａ）、クロロプレンゴムラテックス（ｂ）、カルボジイミド化合物を含有する各実施例の接着剤組成物は初期強度、常態剥離強度、耐熱性のいずれも良好であった。一方、カルボジイミド化合物を含有しない比較例の各接着剤組成物は、他の架橋剤を用いたり、アセチルアセトン金属塩を増量した場合であっても耐熱性が十分ではなかった。 The adhesive compositions of the respective examples containing chloroprene rubber latex (a), chloroprene rubber latex (b), and carbodiimide compound were all good in initial strength, normal peel strength, and heat resistance. On the other hand, each adhesive composition of the comparative example which does not contain a carbodiimide compound did not have sufficient heat resistance even when other crosslinking agents were used or the amount of acetylacetone metal salt was increased.
Claims (5)
含有することを特徴とする請求項１〜３いずれかに記載のクロロプレンゴムラテックス接着剤組成物。 1 to 100 parts by weight of a tackifier resin, 1 to 50 parts by weight of a chlorinated polyolefin resin, and 1 to 50 parts by weight of a plasticizer with respect to a total of 100 parts by weight of the chloroprene rubber latex (a) and the chloroprene rubber latex (b). The chloroprene rubber latex adhesive composition according to any one of claims 1 to 3, comprising 0.1 to 10 parts by weight of an acetylacetone metal salt.
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