JP2021134274A - 水分散型粘着剤組成物および粘着シート - Google Patents
水分散型粘着剤組成物および粘着シート Download PDFInfo
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- JP2021134274A JP2021134274A JP2020031153A JP2020031153A JP2021134274A JP 2021134274 A JP2021134274 A JP 2021134274A JP 2020031153 A JP2020031153 A JP 2020031153A JP 2020031153 A JP2020031153 A JP 2020031153A JP 2021134274 A JP2021134274 A JP 2021134274A
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- 125000001421 myristyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001971 neopentyl group Chemical group [H]C([*])([H])C(C([H])([H])[H])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 125000001400 nonyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- REJKHFKLPFJGAQ-UHFFFAOYSA-N oxiran-2-ylmethanethiol Chemical compound SCC1CO1 REJKHFKLPFJGAQ-UHFFFAOYSA-N 0.000 description 1
- 125000000913 palmityl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002958 pentadecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000001147 pentyl group Chemical group C(CCCC)* 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000009832 plasma treatment Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000767 polyaniline Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 229920006393 polyether sulfone Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920002503 polyoxyethylene-polyoxypropylene Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- UIIIBRHUICCMAI-UHFFFAOYSA-N prop-2-ene-1-sulfonic acid Chemical compound OS(=O)(=O)CC=C UIIIBRHUICCMAI-UHFFFAOYSA-N 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- AAYRWMCIKCRHIN-UHFFFAOYSA-N propane-1-sulfonic acid;prop-2-enamide Chemical compound NC(=O)C=C.CCCS(O)(=O)=O AAYRWMCIKCRHIN-UHFFFAOYSA-N 0.000 description 1
- 125000004368 propenyl group Chemical group C(=CC)* 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 125000002914 sec-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 1
- 229910000077 silane Inorganic materials 0.000 description 1
- 229940083542 sodium Drugs 0.000 description 1
- 229940080264 sodium dodecylbenzenesulfonate Drugs 0.000 description 1
- 235000019333 sodium laurylsulphate Nutrition 0.000 description 1
- 125000004079 stearyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 150000003505 terpenes Chemical class 0.000 description 1
- 235000007586 terpenes Nutrition 0.000 description 1
- 125000000999 tert-butyl group Chemical group [H]C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- CIHOLLKRGTVIJN-UHFFFAOYSA-N tert‐butyl hydroperoxide Chemical compound CC(C)(C)OO CIHOLLKRGTVIJN-UHFFFAOYSA-N 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- 125000002948 undecyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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Abstract
Description
容器内で、蒸留水33質量部と、アクリル酸2−エチルヘキシル85質量部と、アクリル酸メチル13質量部と、アクリル酸1.25質量部と、メタクリル酸0.75質量部と、連鎖移動剤としてのt−ドデカンチオール0.025質量部と、反応性乳化剤(商品名「アクアロンKH−1025」,第一工業製薬株式会社製)1.91質量部と、シランカップリング剤(商品名「KBM−503」,信越化学工業株式会社製)0.02質量部とを含む混合物をホモミキサーによって撹拌し、モノマーエマルションを調製した。次に、還流冷却管、窒素導入管、温度計、および撹拌機を備える反応容器内で、蒸留水67質量部と、反応性乳化剤(商品名「アクアロンKH−1025」,第一工業製薬株式会社製)0.09質量部とを含む混合物を、撹拌しながら、室温(25℃)で1時間、窒素置換した。次に、この混合物に重合開始剤(商品名「VA−057」,富士フィルム和光純薬工業株式会社製)0.1質量部を加えた後、上述のモノマーエマルションを当該混合物に4時間かけて滴下して乳化重合反応を進行させた。次に、当該反応液を、70℃で1時間 エージングし、上記重合開始剤0.05質量部の添加の後に更に2時間 エージングした。そして、こうして得られた溶液を室温まで冷却した後、10質量%アンモニア水溶液を加えることによって溶液のpHを6に調整した。以上のようにして、アクリルポリマーを含有するアクリルポリマーエマルションを調製した。
〈水分散型粘着剤組成物の調製〉
アクリルポリマーエマルションに対し、そのアクリルポリマー(アクリルポリマーエマルションの固形分)100重量部に対して0.5質量部の増粘剤(ポリアクリル酸,重量平均分子量25万,和光純薬工業株式会社製)と、3.6質量部の第1のレベリング剤(商品名「ぺレックスOT−P」,花王株式会社製)と、30質量部の粘着付与剤(商品名「スーパーエステル E−865NT」,荒川化学工業株式会社製)と、0.07質量部のシランカップリング剤(商品名「Z−6210 SILANE」,東レ・ダウコーニング)とを配合して混合した。そして、こうして得られた溶液を、10質量%アンモニア水溶液の添加によって中和した後、蒸留水の添加によって固形分濃度40質量%に調整した。以上のようにして、実施例1の水分散型粘着剤組成物を得た(表1において、組成を表す各数値の単位は「質量部」である)。
まず、PETセパレータ(商品名「ダイアホイル MRF♯38」,三菱ケミカル株式会社製)上に、実施例1の水分散型粘着剤組成物を塗布して塗膜を形成した。次に、セパレータ上の塗膜を、室温で3分間の静置の後、オーブンで3分間乾燥し、PETセパレータ上に厚さ10μmの粘着剤層を形成した。乾燥温度は100℃とした。以上のようにして、粘着シートを作製した。
増粘剤の配合量を0.5質量部から2.5質量部に変更したこと、および、第1のレベリング剤3.6質量部の代わりに第2のレベリング剤(商品名「サーフィノール420」,日新化学工業株式会社製)3.0質量部を配合したこと以外は、実施例1と同様にして、実施例2の水分散型粘着剤組成物および粘着シートを得た。
増粘剤の配合量を0.5質量部から3.0質量部に変更したこと、第1のレベリング剤3.6質量部の代わりに第3のレベリング剤(商品名「SNウエット125」,サンノプコ株式会社製)2.7質量部を配合したこと、および、固形分濃度を40質量%に代えて30質量%としたこと以外は、実施例1と同様にして、実施例3の水分散型粘着剤組成物および粘着シートを得た。
増粘剤の配合量を0.5質量部から0.35質量部(比較例1)または1.0質量部(比較例2)に変更したこと、および、第1のレベリング剤3.6質量部の代わりに上記第3のレベリング剤を1.6質量部(比較例1)または0.85質量部(比較例2)配合したこと以外は、実施例1の水分散型粘着剤組成物と同様にして、比較例1,2の各水分散型粘着剤組成物および各粘着シートを得た。
実施例1〜3および比較例1,2の各水分散型粘着剤組成物の粘度(mPa・s)を、B形粘度計(株式会社トキメック製)を使用して測定した。粘度測定では、測定温度を25℃とし、No.5ローターを使用し、使用装置におけるローター回転数を20rpmとし、測定時間を1分間とした。測定結果を表1に掲げる。
実施例1〜3および比較例1,2の各水分散型粘着剤組成物の表面張力を、JIS−K3362:2008に記載のデュヌイ法(輪環法)に基づき、表面張力測定装置(商品名「ウィルヘルミー型表面張力計」,協和界面科学株式会社製)を使用して調べた。具体的には、まず、試料液としての約60mLの水分散型粘着剤組成物を、測定用の広口カップ(容積100mL)に入れて、装置が備えるステージに乗せた。ステージは上下動可能である。次に、アセトン洗浄後の白金リング(リング直径14.45mm,リング線材の直径0.40mm)を試料液の上方に吊り下げた(試料液の液面に対して白金リングのなす面を平行にした)。次に、温度25℃において、白金リングを、試料液に一旦浸漬させた後に当該試料液に対して相対的に上昇させた(プリウェット)。次に、温度25℃において、白金リングを試料液に一旦浸漬させた後に当該試料液に対して相対的に上昇させ、白金リングが試料液表面から離れる時に当該リングに作用する力(下方への引張り力)のピーク値を測定し、その測定値から試料液(水分散型粘着剤組成物)の表面張力を求めた。本測定において、ステージ上昇速度は0.200mm/秒とし、ステージ下降速度は0.200mm/秒とし、プリウェットステージ上昇速度は0.700mm/秒とし、プリウェットステージ下降速度は0.700mm/秒とし、プリウェット浸漬距離は2.5mmとし、プリウェット浸漬時間は5秒間とした。測定結果を表1に掲げる。
実施例1〜3および比較例1,2の水分散型粘着剤組成物について、粘着シート作製過程の塗膜形成工程においてPETセパレータ上に平面視矩形状に形成された塗膜の第1の幅(初期幅)を測定し、当該塗膜が乾燥工程後を経て形成される粘着剤層の第2の幅(第1の幅と同方向の幅)を測定した。そして、第1の幅に対する第2の幅の割合を、濡れ率(%)として求めた。プラスチック基材であるPETセパレータに対する水分散型粘着剤組成物の濡れ性について、濡れ率が100%である場合を「優」と評価し、濡れ率が90%以上であって100%未満である場合を「良」と評価し、濡れ率が90%未満である場合を「不可」と評価した。評価結果を表1に掲げる。
10 粘着剤層
11 基材
S セパレータ
Claims (11)
- 水分散型ポリマーおよび水を含有し、
粘度が1500mPa・s以上6000mPa・s以下であり、
表面張力が30mN/m以上43mN/m以下であることを特徴とする、水分散型粘着剤組成物。 - 前記水分散型ポリマーが、70質量%以上99.5質量%以下の(メタ)アクリル酸アルキルエステルと0.1質量%以上10質量%以下のカルボキシ基含有モノマーとを含むモノマー成分の重合体であることを特徴とする、請求項1に記載の水分散型粘着剤組成物。
- 前記カルボキシ基含有モノマーが、アクリル酸および/またはメタクリル酸であることを特徴とする、請求項2に記載の水分散型粘着剤組成物。
- 前記水分散型ポリマーが、反応性乳化剤に由来するモノマーユニットを含むことを特徴とする、請求項1から3のいずれか一つに記載の水分散型粘着剤組成物。
- 増粘剤および/またはレベリング剤を更に含有することを特徴とする、請求項1から4のいずれか一つに記載の水分散型粘着剤組成物。
- 前記増粘剤がポリアクリル酸を含むことを特徴とする、請求項5に記載の水分散型粘着剤組成物。
- 前記増粘剤の含有量が、前記水分散型ポリマー100質量部に対して0.5質量部以上7質量部以下であることを特徴とする、請求項5または6に記載の水分散型粘着剤組成物。
- 前記レベリング剤が、ジアルキルスルホコハク酸ナトリウム、アセチレングリコールエチレンオキシド系界面活性剤、および変性シリコーン系界面活性剤からなる群より選択される少なくとも一種を含むことを特徴とする、請求項5から7のいずれか一つに記載の水分散型粘着剤組成物。
- 前記レベリング剤の含有量が、前記水分散型ポリマー100質量部に対して0.5質量部以上8質量部以下であることを特徴とする、請求項5から8のいずれか一つに記載の水分散型粘着剤組成物。
- 前記増粘剤および前記レベリング剤の合計含有量が、前記水分散型ポリマー100質量部に対して2質量部以上10質量部以下であることを特徴とする、請求項5から9のいずれか一つに記載の水分散型粘着剤組成物。
- 請求項1から10のいずれか一つに記載の水分散型粘着剤組成物から形成された厚さ20μm以下の粘着剤層を備えることを特徴とする、粘着シート。
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JP2020031153A JP2021134274A (ja) | 2020-02-27 | 2020-02-27 | 水分散型粘着剤組成物および粘着シート |
EP21158939.5A EP3878877A1 (en) | 2020-02-27 | 2021-02-24 | Water-dispersed pressure-sensitive adhesive composition and pressure-sensitive adhesive sheet |
CN202110219907.7A CN113308215A (zh) | 2020-02-27 | 2021-02-26 | 水分散型粘合剂组合物及粘合片 |
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EP4130065A1 (en) | 2021-08-06 | 2023-02-08 | Nitto Denko Corporation | Water-dispersed pressure-sensitive adhesive composition and pressure-sensitive adhesive sheet |
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JP2001181590A (ja) | 1999-12-27 | 2001-07-03 | Nippon Nsc Ltd | 粘着製品の製造方法 |
JP4106996B2 (ja) | 2002-07-19 | 2008-06-25 | Dic株式会社 | ポリウレタン樹脂水性分散体及び水性接着剤 |
JP4884654B2 (ja) * | 2004-05-11 | 2012-02-29 | 日東電工株式会社 | 粘着シートの製造方法 |
ATE359315T1 (de) | 2005-09-14 | 2007-05-15 | Nat Starch Chem Invest | Neue wässrige klebstoffe für gewerbliche anwendungen |
JP2011016980A (ja) | 2009-06-11 | 2011-01-27 | Toray Fine Chemicals Co Ltd | アクリルエマルジョン組成物 |
JP2011225812A (ja) | 2010-03-29 | 2011-11-10 | Dic Corp | 水分散型アクリル系粘着剤組成物及び粘着剤層の製造方法 |
JP5628884B2 (ja) * | 2012-11-26 | 2014-11-19 | 日東電工株式会社 | 水分散型粘着剤組成物、粘着剤層、粘着シート、及び、当該粘着剤層または粘着シートを含む積層体 |
JP6098938B2 (ja) | 2013-04-02 | 2017-03-22 | ナガセケムテックス株式会社 | 電子部品封止用接着剤 |
US10526480B2 (en) * | 2016-11-15 | 2020-01-07 | Hercules Llc | Ultra-high solids emulsion and application |
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EP4130065A1 (en) | 2021-08-06 | 2023-02-08 | Nitto Denko Corporation | Water-dispersed pressure-sensitive adhesive composition and pressure-sensitive adhesive sheet |
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