JP2021066820A - 透明溶剤系アクリル感圧接着剤、及び接着フィルム - Google Patents
透明溶剤系アクリル感圧接着剤、及び接着フィルム Download PDFInfo
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- JP2021066820A JP2021066820A JP2019193611A JP2019193611A JP2021066820A JP 2021066820 A JP2021066820 A JP 2021066820A JP 2019193611 A JP2019193611 A JP 2019193611A JP 2019193611 A JP2019193611 A JP 2019193611A JP 2021066820 A JP2021066820 A JP 2021066820A
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- Prior art keywords
- meth
- adhesive
- mass
- sensitive adhesive
- acrylic polymer
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- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 description 1
- 125000002704 decyl group Chemical group [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])* 0.000 description 1
- 150000001990 dicarboxylic acid derivatives Chemical class 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 125000000118 dimethyl group Chemical group [H]C([H])([H])* 0.000 description 1
- CZZYITDELCSZES-UHFFFAOYSA-N diphenylmethane Chemical compound C=1C=CC=CC=1CC1=CC=CC=C1 CZZYITDELCSZES-UHFFFAOYSA-N 0.000 description 1
- 125000003438 dodecyl group Chemical group [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])* 0.000 description 1
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- 239000012760 heat stabilizer Substances 0.000 description 1
- 125000004051 hexyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000012948 isocyanate Substances 0.000 description 1
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- 150000002513 isocyanates Chemical class 0.000 description 1
- 125000001972 isopentyl group Chemical group [H]C([H])([H])C([H])(C([H])([H])[H])C([H])([H])C([H])([H])* 0.000 description 1
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- 239000007788 liquid Substances 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- JDSHMPZPIAZGSV-UHFFFAOYSA-N melamine Chemical compound NC1=NC(N)=NC(N)=N1 JDSHMPZPIAZGSV-UHFFFAOYSA-N 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- LVHBHZANLOWSRM-UHFFFAOYSA-N methylenebutanedioic acid Natural products OC(=O)CC(=C)C(O)=O LVHBHZANLOWSRM-UHFFFAOYSA-N 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 150000002762 monocarboxylic acid derivatives Chemical class 0.000 description 1
- DFENKTCEEGOWLB-UHFFFAOYSA-N n,n-bis(methylamino)-2-methylidenepentanamide Chemical compound CCCC(=C)C(=O)N(NC)NC DFENKTCEEGOWLB-UHFFFAOYSA-N 0.000 description 1
- 125000004108 n-butyl group Chemical group [H]C([H])([H])C([H])([H])C([H])([H])C([H])([H])* 0.000 description 1
- 150000001451 organic peroxides Chemical class 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- STIABRLGDKHASC-UHFFFAOYSA-N phthalic acid;prop-2-enoic acid Chemical compound OC(=O)C=C.OC(=O)C1=CC=CC=C1C(O)=O STIABRLGDKHASC-UHFFFAOYSA-N 0.000 description 1
- 150000003053 piperidines Chemical class 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 239000002798 polar solvent Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920006289 polycarbonate film Polymers 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 230000004224 protection Effects 0.000 description 1
- 238000010526 radical polymerization reaction Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 125000001424 substituent group Chemical group 0.000 description 1
- 238000010557 suspension polymerization reaction Methods 0.000 description 1
- WUPCFMITFBVJMS-UHFFFAOYSA-N tetrakis(1,2,2,6,6-pentamethylpiperidin-4-yl) butane-1,2,3,4-tetracarboxylate Chemical compound C1C(C)(C)N(C)C(C)(C)CC1OC(=O)CC(C(=O)OC1CC(C)(C)N(C)C(C)(C)C1)C(C(=O)OC1CC(C)(C)N(C)C(C)(C)C1)CC(=O)OC1CC(C)(C)N(C)C(C)(C)C1 WUPCFMITFBVJMS-UHFFFAOYSA-N 0.000 description 1
- NZNAAUDJKMURFU-UHFFFAOYSA-N tetrakis(2,2,6,6-tetramethylpiperidin-4-yl) butane-1,2,3,4-tetracarboxylate Chemical compound C1C(C)(C)NC(C)(C)CC1OC(=O)CC(C(=O)OC1CC(C)(C)NC(C)(C)C1)C(C(=O)OC1CC(C)(C)NC(C)(C)C1)CC(=O)OC1CC(C)(C)NC(C)(C)C1 NZNAAUDJKMURFU-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
- 238000002834 transmittance Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 125000001425 triazolyl group Chemical group 0.000 description 1
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- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
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- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
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- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
- C09J133/062—Copolymers with monomers not covered by C09J133/06
- C09J133/064—Copolymers with monomers not covered by C09J133/06 containing anhydride, COOH or COOM groups, with M being metal or onium-cation
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- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
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- C08F220/02—Monocarboxylic acids having less than ten carbon atoms; Derivatives thereof
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- C08F220/14—Methyl esters, e.g. methyl (meth)acrylate
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- C08F220/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and only one being terminated by only one carboxyl radical or a salt, anhydride ester, amide, imide or nitrile thereof
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- C08F220/10—Esters
- C08F220/12—Esters of monohydric alcohols or phenols
- C08F220/16—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms
- C08F220/18—Esters of monohydric alcohols or phenols of phenols or of alcohols containing two or more carbon atoms with acrylic or methacrylic acids
- C08F220/1808—C8-(meth)acrylate, e.g. isooctyl (meth)acrylate or 2-ethylhexyl (meth)acrylate
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- C08K5/3412—Heterocyclic compounds having nitrogen in the ring having one nitrogen atom in the ring
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- C08K5/3467—Heterocyclic compounds having nitrogen in the ring having more than two nitrogen atoms in the ring
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- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/302—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive being pressure-sensitive, i.e. tacky at temperatures inferior to 30°C
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- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
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Abstract
Description
2−エチルヘキシルアクリレート(2EHA)64質量部、ブチルアクリレート(BA)30質量部、及びアクリル酸(AA)6質量部を、酢酸エチル66.7質量部に溶解させ、重合開始剤としてジメチル2,2’−アゾビス(2−メチルプロピオネート)(商品名V−601、富士フイルム和光純薬株式会社(日本国大阪府大阪市))0.5質量部を加えた後、窒素雰囲気下75℃で24時間反応させ、粘着性ポリマー1(ADH1)の酢酸エチル溶液(固形分含量60%)を調製した。ADH1の重量平均分子量(Mw)は300,000、ガラス転移温度(Tg)は−57℃であった。Tgは、各ポリマーがn種類のモノマーから共重合されているとしてFOXの式より求めた。合成例2〜5についても同様である。
2EHA64質量部、BA30質量部、及びAA6質量部を、酢酸エチル66.7質量部に溶解させ、重合開始剤としてジメチル2,2’−アゾビス(2−メチルプロピオネート)(商品名V−601、富士フイルム和光純薬株式会社(日本国大阪府大阪市))0.7質量部を加えた後、窒素雰囲気下75℃で24時間反応させ、粘着性ポリマー2(ADH2)の酢酸エチル溶液(固形分含量60%)を調製した。ADH2の重量平均分子量(Mw)は230,000、ガラス転移温度(Tg)は−57℃であった。
2EHA64質量部、BA30質量部、及びAA6質量部を、酢酸エチル66.7質量部に溶解させ、重合開始剤としてジメチル2,2’−アゾビス(2−メチルプロピオネート)(商品名V−601、富士フイルム和光純薬株式会社(日本国大阪府大阪市))0.4質量部を加えた後、窒素雰囲気下75℃で24時間反応させ、粘着性ポリマー3(ADH3)の酢酸エチル溶液(固形分含量60%)を調製した。ADH3の重量平均分子量(Mw)は350,000、ガラス転移温度(Tg)は−57℃であった。
2EHA64質量部、BA30質量部、及びAA6質量部を、酢酸エチル66.7質量部に溶解させ、重合開始剤としてジメチル2,2’−アゾビス(2−メチルプロピオネート)(商品名V−601、富士フイルム和光純薬株式会社(日本国大阪府大阪市))0.55質量部を加えた後、窒素雰囲気下75℃で24時間反応させ、粘着性ポリマー4(ADH4)の酢酸エチル溶液(固形分含量60%)を調製した。ADH4の重量平均分子量(Mw)は280,000、ガラス転移温度(Tg)は−57℃であった。
メチルメタクリレート(MMA)60質量部、ブチルメタクリレート(BMA)34質量部、及びジメチルアミノエチルメタクリレート(DMAEMA)6質量部を酢酸エチル150質量部に溶解させ、重合開始剤としてジメチル−2,2−アゾビス(2−メチルプロピオネート)(商品名V−601、富士フイルム和光純薬株式会社(日本国大阪府大阪市))0.6質量部を加えた後、窒素雰囲気下65℃で24時間反応させ、高Tgポリマー1(HTP1)の酢酸エチル溶液(固形分含量40%)を調製した。HTP1の重量平均分子量(Mw)は68,000、ガラス転移温度(Tg)は63℃であった。
粘着性ポリマー1(ADH1)、高Tgポリマー1(HTP1)、共有結合性架橋剤(CCL1)及び非共有結合性架橋剤1(NCL1)を含む透明溶剤系アクリル感圧接着剤を調製した。ADH1:HTP1:CCL1:NCL1の質量比は固形分で100:5.0:0.15:5.0であった。透明溶剤系アクリル感圧接着剤の固形分含量は52質量%であった。透明溶剤系アクリル感圧接着剤を剥離紙1(L1)のシリコーン処理面上にナイフコータで塗布した。塗布層を95℃で5分間乾燥して、厚さ39μmの透明感圧接着層を得た。透明感圧接着層をエンボス処理された170μm厚ポリ塩化ビニルフィルムの平滑面に転写して例1の接着フィルムを得た。
例2〜16及び比較例1の接着フィルムを例1の接着フィルムと同様に作製した。これらの接着フィルムの作製に使用した透明溶剤系アクリル感圧接着剤の組成、及び透明感圧接着層の厚さを表2に示す。
接着フィルムの特性を以下の方法に従って評価した。
接着フィルムを150mm角に切断して試験片を作製した。23℃の環境下で試験片をアルミ板上にローラーで貼り付けた。試験片は23℃の環境下に24時間放置した。試験片にカッターで十字に切り込みを入れた。65℃オーブンに48時間放置した。取り出し後マイクロメーターでフィルム収縮量(mm)を測定し、最大値を記録した。
接着フィルムを長さ300mm、幅210mmに切断して試験片を作製した。試験片をメラミン焼き付け塗装板(株式会社パルテック(日本国神奈川県平塚市))に23℃の環境下においてスキージで貼り付けた。試験片を手で高速剥離した。試験片の変形なく容易に剥離できた場合は「良」、試験片の変形はないが剥離が重い場合は「不良」、タックが強く高速での剥離が困難であった場合は「劣悪」と判断した。
接着フィルムを長さ150mm、幅25mmの長方形に切断して試験片を作製した。試験片をリン酸塩処理電気亜鉛めっき鋼板(SECC−P、1mm厚、株式会社パルテック(日本国神奈川県平塚市))の上に20℃で貼り付けた。貼り付け方法はJIS Z 0237 8.2.3.に準拠した。試験片を20℃で24時間放置した。引張試験機(テンシロン万能試験機、型番:RTC−1210A、株式会社エー・アンド・デイ(日本国東京都豊島区))を用いて温度20℃、剥離速度300mm/分で90度剥離を行ったときの接着力(N/25mm)を測定した。
接着フィルムを長さ150mm、幅25mmに切断して試験片を作製した。試験片のうち長さ25mmをアルミニウム基材にスキージで貼り付け20℃環境下に24時間放置した。試験片の自由端(貼り付けていない部分)に1kg重のおもりを固定し、おもりを鉛直下方に設置してアルミニウム基材に対して180度方向に荷重をかけて40℃環境下に最大24時間放置した。試験片がアルミニウム基材から落下するまでの時間(定荷重せん断剥離時間)を測定して記録した。
12 基材層
14 透明感圧接着層
16 ライナー
Claims (9)
- 重量平均分子量が350,000以下の粘着性(メタ)アクリル系ポリマーと、
ガラス転移温度が40℃以上の高Tg(メタ)アクリル系ポリマーと、
前記粘着性(メタ)アクリル系ポリマーと共有結合を形成可能な共有結合性架橋剤と、
ベンゾトリアゾール化合物、少なくとも2つのピペリジル基を有するピペリジル化合物、及びアルミニウムキレート化合物からなる群より選択される少なくとも1種の非共有結合性架橋剤と
を含む、透明溶剤系アクリル感圧接着剤。 - 固形分含量が40質量%以上である、請求項1に記載の透明溶剤系アクリル感圧接着剤。
- 前記粘着性(メタ)アクリル系ポリマーが、カルボキシ基含有(メタ)アクリル系ポリマーであり、前記高Tg(メタ)アクリル系ポリマーが、芳香族ビニルモノマーに由来するモノマー単位を含まないアミノ基含有(メタ)アクリル系ポリマーである、請求項1又は2のいずれかに記載の透明溶剤系アクリル感圧接着剤。
- 前記共有結合性架橋剤が、エポキシ架橋剤、及びビスアミド架橋剤からなる群より選択される少なくとも1種である、請求項3に記載の透明溶剤系アクリル感圧接着剤。
- 前記粘着性(メタ)アクリル系ポリマー100質量部を基準として、前記高Tg(メタ)アクリル系ポリマーを1質量部〜20質量部含む、請求項1〜4のいずれか一項に記載の透明溶剤系アクリル感圧接着剤。
- 前記非共有結合性架橋剤が、前記ベンゾトリアゾール化合物及び前記ピペリジル化合物からなる群より選択される少なくとも1種であり、前記粘着性(メタ)アクリル系ポリマー100質量部を基準として、前記非共有結合性架橋剤を0.1質量部〜15質量部含む、請求項1〜5のいずれか一項に記載の透明溶剤系アクリル感圧接着剤。
- 前記非共有結合性架橋剤が、前記アルミニウムキレート化合物であり、前記粘着性(メタ)アクリル系ポリマー100質量部を基準として、前記非共有結合性架橋剤を0.01質量部〜2質量部含む、請求項1〜5のいずれか一項に記載の透明溶剤系アクリル感圧接着剤。
- 基材層、及び前記基材層の上に配置された透明感圧接着層を含む接着フィルムであって、前記透明感圧接着層が、
重量平均分子量が350,000以下の粘着性(メタ)アクリル系ポリマーと、
ガラス転移温度が40℃以上の高Tg(メタ)アクリル系ポリマーと、
前記粘着性(メタ)アクリル系ポリマーと共有結合を形成可能な共有結合性架橋剤と、
ベンゾトリアゾール化合物、少なくとも2つのピペリジル基を有するピペリジル化合物、及びアルミニウムキレート化合物からなる群より選択される少なくとも1種の非共有結合性架橋剤と
を含む透明アクリル感圧接着剤の反応物を含む、接着フィルム。 - 前記透明感圧接着層の厚さが25μm〜45μmであり、前記接着フィルムの定荷重せん断剥離時間が、アルミニウム基材に接着領域25mm×25mmで接着したときに、温度40℃、荷重1kgの条件下で5時間超である、請求項8に記載の接着フィルム。
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