JP4490064B2 - 粘着剤組成物 - Google Patents
粘着剤組成物 Download PDFInfo
- Publication number
- JP4490064B2 JP4490064B2 JP2003323262A JP2003323262A JP4490064B2 JP 4490064 B2 JP4490064 B2 JP 4490064B2 JP 2003323262 A JP2003323262 A JP 2003323262A JP 2003323262 A JP2003323262 A JP 2003323262A JP 4490064 B2 JP4490064 B2 JP 4490064B2
- Authority
- JP
- Japan
- Prior art keywords
- weight
- pressure
- meth
- sensitive adhesive
- acrylic copolymer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 239000000853 adhesive Substances 0.000 title claims description 38
- 230000001070 adhesive effect Effects 0.000 title claims description 38
- 239000000203 mixture Substances 0.000 title claims description 30
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims description 59
- 239000000178 monomer Substances 0.000 claims description 51
- 229920006243 acrylic copolymer Polymers 0.000 claims description 45
- 239000003431 cross linking reagent Substances 0.000 claims description 14
- 125000000524 functional group Chemical group 0.000 claims description 14
- 238000007334 copolymerization reaction Methods 0.000 claims description 13
- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 claims description 7
- 229920001577 copolymer Polymers 0.000 claims description 3
- -1 isocyanate compound Chemical class 0.000 description 21
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 18
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 15
- OZAIFHULBGXAKX-UHFFFAOYSA-N 2-(2-cyanopropan-2-yldiazenyl)-2-methylpropanenitrile Chemical compound N#CC(C)(C)N=NC(C)(C)C#N OZAIFHULBGXAKX-UHFFFAOYSA-N 0.000 description 14
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 12
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 11
- 239000010410 layer Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 10
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 9
- 238000004132 cross linking Methods 0.000 description 8
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- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 6
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 6
- 239000012298 atmosphere Substances 0.000 description 6
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 238000002156 mixing Methods 0.000 description 6
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 5
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- 239000002390 adhesive tape Substances 0.000 description 5
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- 230000007423 decrease Effects 0.000 description 5
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- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 3
- PSGCQDPCAWOCSH-UHFFFAOYSA-N (4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl) prop-2-enoate Chemical compound C1CC2(C)C(OC(=O)C=C)CC1C2(C)C PSGCQDPCAWOCSH-UHFFFAOYSA-N 0.000 description 2
- XVOUMQNXTGKGMA-OWOJBTEDSA-N (E)-glutaconic acid Chemical compound OC(=O)C\C=C\C(O)=O XVOUMQNXTGKGMA-OWOJBTEDSA-N 0.000 description 2
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- JAHNSTQSQJOJLO-UHFFFAOYSA-N 2-(3-fluorophenyl)-1h-imidazole Chemical compound FC1=CC=CC(C=2NC=CN=2)=C1 JAHNSTQSQJOJLO-UHFFFAOYSA-N 0.000 description 2
- 125000000954 2-hydroxyethyl group Chemical group [H]C([*])([H])C([H])([H])O[H] 0.000 description 2
- CYUZOYPRAQASLN-UHFFFAOYSA-N 3-prop-2-enoyloxypropanoic acid Chemical compound OC(=O)CCOC(=O)C=C CYUZOYPRAQASLN-UHFFFAOYSA-N 0.000 description 2
- JTHZUSWLNCPZLX-UHFFFAOYSA-N 6-fluoro-3-methyl-2h-indazole Chemical compound FC1=CC=C2C(C)=NNC2=C1 JTHZUSWLNCPZLX-UHFFFAOYSA-N 0.000 description 2
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 2
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- XXROGKLTLUQVRX-UHFFFAOYSA-N allyl alcohol Chemical compound OCC=C XXROGKLTLUQVRX-UHFFFAOYSA-N 0.000 description 2
- HNEGQIOMVPPMNR-IHWYPQMZSA-N citraconic acid Chemical compound OC(=O)C(/C)=C\C(O)=O HNEGQIOMVPPMNR-IHWYPQMZSA-N 0.000 description 2
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- 239000011248 coating agent Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 2
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- 125000003055 glycidyl group Chemical group C(C1CO1)* 0.000 description 2
- 150000002513 isocyanates Chemical class 0.000 description 2
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- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 2
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- UPMLOUAZCHDJJD-UHFFFAOYSA-N 4,4'-Diphenylmethane Diisocyanate Chemical compound C1=CC(N=C=O)=CC=C1CC1=CC=C(N=C=O)C=C1 UPMLOUAZCHDJJD-UHFFFAOYSA-N 0.000 description 1
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Description
本発明に用いるアクリル系共重合体(A)としては、溶解度パラメーター(SP値)が8.5未満、好ましくは8.0以下の(メタ)アクリル酸アルキルエステル(a1)と官能基含有不飽和単量体(a2)、更に必要に応じてその他の共重合可能な不飽和単量体(a3)を共重合成分として共重合させたさせたものである。かかる(メタ)アクリル酸アルキルエステル(a1)の溶解度パラメーター(SP値)が8.5以上では充分な接着性やタックが得られず、特に非極性被着体に対して充分な接着性が得られない。
尚、溶解度パラメーター(SP値)は、化合物の極性を表す尺度として一般に用いられており、本発明ではSmallの計算式にHoyの凝集エネルギー定数を代入して導いた値を適用するものとし、単位は(cal/cm3)1/2で表される。
かかる共重合に用いられる有機溶媒としては、トルエン、キシレン等の芳香族炭化水素類、酢酸エチル、酢酸ブチル等のエステル類、n−プロピルアルコール、iso−プロピルアルコール等の脂肪族アルコール類、メチルエチルケトン、メチルイソブチルケトン、シクロヘキサノン等のケトン類等が挙げられる。
また、かかるラジカル共重合に用いられる重合触媒としては、通常のラジカル重合触媒であるアゾビスイソブチロニトリル、ベンゾイルパーオキサイド、ジ−t−ブチルパーオキサイド、クメンハイドロパーオキサイド等が挙げられる。
また、アクリル系共重合体(A)のガラス転移温度としては、−100〜0℃であることが好ましく、更には−80〜−20℃が好ましい。かかるガラス転移温度が−100℃未満では保持力が弱くなり、0℃を越えると接着力が低下し好ましくない。
また、アクリル共重合体(B)のガラス転移温度としては、−100〜0℃であることが好ましく、更には−80〜−20℃が好ましい。かかるガラス転移温度が−100℃未満では保持力が弱くなり、0℃を越えると接着力が低下し好ましくない。
又、本発明の粘着剤組成物は、再剥離性にも優れた効果を有するものであり、マスキング用などの再剥離型の粘着製品として非常に有用である。
温度計、撹拌機、滴下ロート及び還流冷却器を備えた反応器内に、表1に示す如きモノマー、及びアゾビスイソブチロニトリル(AIBN)0.1部及び酢酸エチル100部を仕込み、90℃に加温して重合させ、重合途中にトルエン10部にAIBN0.1部を溶解させた重合触媒液を逐次追加しながら7時間重合させた後、トルエンで希釈して、アクリル系共重合体(A)の40%溶液を得た。
又、同様にして、比較例となるアクリル系共重合体(A′)も調製した。
温度計、撹拌機、滴下ロート及び還流冷却器を備えた反応器内に、表2に示す如きモノマー、及びアゾビスイソブチロニトリル(AIBN)0.1部及び酢酸エチル100部を仕込み、90℃に加温して重合させ、重合途中にトルエン10部にAIBN0.1部を溶解させた重合触媒液を逐次追加しながら7時間重合させた後、トルエンで希釈して、アクリル系共重合体(B)の40%溶液を得た。
又、同様にして、比較例となるアクリル系共重合体(B′)も調製した。
表1に示す如くアクリル系共重合体(A)、アクリル系共重合体(B)、架橋剤(C)を配合し、粘着剤組成物を得た(固形分40%)。
尚、架橋剤(C)としては、多官能性芳香族イソシアネート(商品名「コロネートL55E」、日本ポリウレタン工業株式会社製)を用いた。
(粘着シートの作製)
基材としてポリエチレンテレフタレート(PET)フィルム(厚さ25μm)を用い、得られた粘着剤組成物を乾燥後の厚さが25μmになるように塗布した後、100℃で3分間乾燥させた。その後、粘着剤層表面に離型紙(サンエー化研株式会社製、商品名「K−80HS」)を貼着して保護した後、温度23℃、相対湿度50%の雰囲気下で7日間養生し、粘着シートを得た。
得られた粘着シートについて、以下の評価を行った。尚、離型紙は各種測定試験を実施する際に引き剥がした。
被着体[(1)SUS板、(2)ポリエチレン板、(3)ベニヤ板]に、25mm×100mmの上記粘着シートを23℃、相対湿度50%の雰囲気下で2kgゴムローラー2往復で加圧貼付し、同雰囲気下で30分放置した後、常温で剥離速度300mm/minで180度剥離強度(N/25mm)を測定した。
尚、ベニヤ板での評価は粗面接着力の評価にもなるのである。
被着体[(1)SUS板、(2)ポリエチレン板、(3)ベニヤ板、(4)塩化ビニル板]に、25mm×100mmの上記粘着シートを23℃、相対湿度50%の雰囲気下で2kgゴムローラー2往復で加圧貼付し、65℃、相対湿度80%の雰囲気下で7日間放置した後、常温で手で135度方向に粘着シートをゆっくりと剥離したときの粘着剤組成物の被着体への糊残りを観察し、下記の通り評価した。
○・・・糊残りは見られなかった。
△・・・若干の糊残りが見られた。
×・・・糊残りが多く見られた。
25mmφのポリエチレン製の円柱に、粘着シート(幅25mm、長さ40mm)を貼り付けて、40℃で5日放置後の粘着シートの浮き具合を観察して、以下の基準で評価した。
○・・・剥がれは全く認められない。
△・・・剥がれは認められるが、端部から平均10mm未満である。
×・・・端部から平均10mm以上の剥がれが認められる。
JIS−Z−0237に準拠し、23℃、相対湿度50%の雰囲気におけるボールタック試験を行った。
Claims (3)
- 溶解度パラメーター(SP値)が8.5未満の(メタ)アクリル酸アルキルエステル(a1)60〜99.9重量%、カルボキシル基含有不飽和単量体(a2)0.1〜20重量%、その他の共重合可能な不飽和単量体(a3)0〜39.9重量%を共重合成分として共重合させたアクリル系共重合体(A)と、溶解度パラメーター(SP値)が8.5以上の(メタ)アクリル酸アルキルエステル(b1)60〜99.9重量%、官能基含有不飽和単量体(b2)0.1〜20重量%、その他の共重合可能な不飽和単量体(b3)0〜39.9重量%を共重合成分として共重合させたアクリル系共重合体(B)、及び架橋剤(C)を含有してなり、アクリル系共重合体(A)とアクリル系共重合体(B)の含有割合が、アクリル系共重合体(A)/アクリル系共重合体(B)=99.9/0.1〜60/40(重量比)であり、架橋剤(C)の含有量が粘着剤組成物全体に対して0.1〜5重量%であることを特徴とする粘着剤組成物。
- (メタ)アクリル酸アルキルエステル(a1)の溶解度パラメーター(SP値)が8.0以下であることを特徴とする請求項1記載の粘着剤組成物。
- 再剥離型粘着製品に用いることを特徴とする請求項1または2記載の粘着剤組成物。
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JP4755876B2 (ja) * | 2005-10-06 | 2011-08-24 | 日本合成化学工業株式会社 | 官能基含有アクリル系共重合体の製造方法および粘着剤組成物の製造方法 |
JP5072260B2 (ja) * | 2006-04-28 | 2012-11-14 | 日本カーバイド工業株式会社 | 光学部材表面保護フィルム用感圧接着剤組成物及び光学部材表面保護フィルム |
JP5977110B2 (ja) * | 2012-07-27 | 2016-08-24 | 日東電工株式会社 | 粘着シート |
JP2016125026A (ja) * | 2015-01-07 | 2016-07-11 | 日東電工株式会社 | 粘着テープ |
KR101730462B1 (ko) | 2015-03-20 | 2017-05-11 | 토요잉크Sc홀딩스주식회사 | 점착제 및 점착 테이프 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04178482A (ja) * | 1990-11-09 | 1992-06-25 | Nitto Denko Corp | 感圧接着剤及び表面保護部材 |
JPH10279907A (ja) * | 1997-04-09 | 1998-10-20 | Soken Chem & Eng Co Ltd | 偏光板用粘着剤組成物および偏光板 |
JPH1125611A (ja) * | 1997-07-02 | 1999-01-29 | Fuji Photo Film Co Ltd | 画像情報記録媒体 |
JP2000152779A (ja) * | 1998-11-17 | 2000-06-06 | Oyama Tofu Kk | 笹より分離した納豆菌及びその他の類似菌株を使用して製造した笹納豆 |
JP2002121521A (ja) * | 2000-10-13 | 2002-04-26 | Nippon Carbide Ind Co Inc | 偏光フィルム用粘着剤組成物及び偏光フィルム |
JP2004002782A (ja) * | 2002-04-05 | 2004-01-08 | Nippon Carbide Ind Co Inc | 偏光フィルム用感圧接着剤組成物及び偏光フィルム |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04178482A (ja) * | 1990-11-09 | 1992-06-25 | Nitto Denko Corp | 感圧接着剤及び表面保護部材 |
JPH10279907A (ja) * | 1997-04-09 | 1998-10-20 | Soken Chem & Eng Co Ltd | 偏光板用粘着剤組成物および偏光板 |
JPH1125611A (ja) * | 1997-07-02 | 1999-01-29 | Fuji Photo Film Co Ltd | 画像情報記録媒体 |
JP2000152779A (ja) * | 1998-11-17 | 2000-06-06 | Oyama Tofu Kk | 笹より分離した納豆菌及びその他の類似菌株を使用して製造した笹納豆 |
JP2002121521A (ja) * | 2000-10-13 | 2002-04-26 | Nippon Carbide Ind Co Inc | 偏光フィルム用粘着剤組成物及び偏光フィルム |
JP2004002782A (ja) * | 2002-04-05 | 2004-01-08 | Nippon Carbide Ind Co Inc | 偏光フィルム用感圧接着剤組成物及び偏光フィルム |
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