JP2015189852A5 - - Google Patents
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- JP2015189852A5 JP2015189852A5 JP2014067902A JP2014067902A JP2015189852A5 JP 2015189852 A5 JP2015189852 A5 JP 2015189852A5 JP 2014067902 A JP2014067902 A JP 2014067902A JP 2014067902 A JP2014067902 A JP 2014067902A JP 2015189852 A5 JP2015189852 A5 JP 2015189852A5
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- molecular weight
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- adhesive
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- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive Effects 0.000 claims description 7
- -1 isocyanate compound Chemical class 0.000 claims description 4
- 230000003287 optical Effects 0.000 claims description 3
- 239000000178 monomer Substances 0.000 claims 7
- 229920001577 copolymer Polymers 0.000 claims 4
- 239000004820 Pressure-sensitive adhesive Substances 0.000 claims 3
- 125000003545 alkoxy group Chemical group 0.000 claims 2
- 125000002947 alkylene group Chemical group 0.000 claims 2
- 125000004432 carbon atoms Chemical group C* 0.000 claims 2
- 125000002887 hydroxy group Chemical group [H]O* 0.000 claims 2
- 125000000217 alkyl group Chemical group 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 210000002858 crystal cell Anatomy 0.000 claims 1
- 238000005227 gel permeation chromatography Methods 0.000 claims 1
- 239000011521 glass Substances 0.000 claims 1
- 239000003112 inhibitor Substances 0.000 claims 1
- 230000002401 inhibitory effect Effects 0.000 claims 1
- 239000004973 liquid crystal related substance Substances 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 239000000203 mixture Substances 0.000 claims 1
- 238000006116 polymerization reaction Methods 0.000 claims 1
- 238000010526 radical polymerization reaction Methods 0.000 claims 1
- 239000000758 substrate Substances 0.000 claims 1
- 238000005187 foaming Methods 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
Description
上記高分子量成分（ＰＨ）の重量平均分子量は、８０万〜２００万であり、１２０万〜２００万であることがより好ましい。高分子量成分（ＰＨ）の重量平均分子量が８０万よりも小さいと、後述するイソシアネート系化合物（Ｂ）と反応させても粘着層の凝集力が
不足し、発泡、浮き・剥がれが生じる。一方、高分子量成分（ＰＨ）の重量平均分子量が２００万より大きいと、粘度が高くなり塗工等の作業性が劣り、光学特性を維持できなくなる。上記低分子量成分（ＰＬ）の重量平均分子量は、５０００〜２０万であり、５０００〜１０万であることがより好ましい。低分子量成分（ＰＬ）の重量平均分子量が５０００より小さい低分子量成分（ＰＬ）を用いると、凝集力が不足して発泡、浮き・剥がれが生じやすい。また、重量平均分子量が１５万を超える低分子量成分（ＰＬ）を用いると偏光板の収縮により生じる応力集中を緩和できなくなり、光漏れ現象が生じる。
The weight average molecular weight of the high molecular weight component (PH) is 800,000 to 2,000,000, more preferably 1,200,000 to 2,000,000. When the weight average molecular weight of the high molecular weight component (PH) is less than 800,000, the cohesive force of the adhesive layer is insufficient even when reacted with the isocyanate compound (B) described later, and foaming, floating and peeling occur. On the other hand, if the weight average molecular weight of the high molecular weight component (PH) is larger than 2 million, the viscosity becomes high and workability such as coating is inferior, and the optical properties cannot be maintained. The weight average molecular weight of the low molecular weight component (PL) is from 5000 to 200,000, more preferably 5,000 to 100,000. When the low molecular weight component (PL) having a weight average molecular weight of less than 5000 is used, the cohesive force is insufficient and foaming, floating and peeling are likely to occur. If a low molecular weight component (PL) having a weight average molecular weight exceeding 150,000 is used, stress concentration caused by contraction of the polarizing plate cannot be relaxed, and a light leakage phenomenon occurs.
Claims (8)
前記アクリル系共重合体（Ａ）が、（１）単量体混合物１００重量部のうち水酸基を含有する単量体（Ａ−１）０．０５〜５．０重量部、アルコキシ基を含有する単量体（Ａ−２）２０〜８０重量部と、前記（Ａ−１）および（Ａ−２）と共重合可能なその他の単量体（Ａ−３）「但し前記（Ａ−１）および（Ａ−２）を除く」１５〜７９．９５重量部とをラジカル重合してなる共重合体であり、
（２）高分子量成分（ＰＨ）と低分子量成分（ＰＬ）とを含み、ゲルパーミエイションクロマトグラフィーにおける排出曲線上独立した、重量平均分子量が８０万〜２００万の高分子量成分（ＰＨ）のピークと、重量平均分子量が５０００〜２０万の低分子量成分（ＰＬ）のピークとを含有し、前記高分子量成分（ＰＨ）のピークと前記低分子量成分（ＰＬ）のピークとの面積比が、（ＰＨ）／（ＰＬ）＝８５／１５〜１５／８５であることを特徴とする粘着剤。 A pressure-sensitive adhesive containing an acrylic copolymer (A) and an isocyanate compound (B),
The acrylic copolymer (A) contains 0.05 to 5.0 parts by weight of a hydroxyl group-containing monomer (A-1) out of 100 parts by weight of the monomer mixture (1) and an alkoxy group. Monomer (A-2) 20 to 80 parts by weight, and other monomer (A-3) copolymerizable with (A-1) and (A-2) And (A-2) ”is a copolymer obtained by radical polymerization of 15 to 79.95 parts by weight,
(2) A high molecular weight component (PH) containing a high molecular weight component (PH) and a low molecular weight component (PL), having an independent weight average molecular weight of 800,000 to 2,000,000 on an emission curve in gel permeation chromatography. Containing a peak and a peak of a low molecular weight component (PL) having a weight average molecular weight of 5000 to 200,000, and an area ratio between the peak of the high molecular weight component (PH) and the peak of the low molecular weight component (PL) is (PH) / (PL) = 85/15 to 15/85.
前記アルコキシ基を含有する単量体（Ａ−２）が炭素数１〜４のアルキレン基を含有する（メタ）アクリル酸アルコキシアルキルエステルであり、
前記その他の単量体（Ａ−３）が炭素数１〜８のアルキル基を有する（メタ）アクリル酸アルキルエステルであることを特徴とする請求項１記載の粘着剤。 The monomer (A-1) containing a hydroxyl group is a (meth) acrylic acid hydroxyalkyl ester having a C 1-4 alkylene group,
The monomer (A-2) containing the alkoxy group is a (meth) acrylic acid alkoxyalkyl ester containing an alkylene group having 1 to 4 carbon atoms,
The pressure-sensitive adhesive according to claim 1, wherein the other monomer (A-3) is a (meth) acrylic acid alkyl ester having an alkyl group having 1 to 8 carbon atoms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014067902A JP6245032B2 (en) | 2014-03-28 | 2014-03-28 | Adhesive and adhesive film using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014067902A JP6245032B2 (en) | 2014-03-28 | 2014-03-28 | Adhesive and adhesive film using the same |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2015189852A JP2015189852A (en) | 2015-11-02 |
| JP2015189852A5 true JP2015189852A5 (en) | 2016-12-08 |
| JP6245032B2 JP6245032B2 (en) | 2017-12-13 |
Family
ID=54424651
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2014067902A Active JP6245032B2 (en) | 2014-03-28 | 2014-03-28 | Adhesive and adhesive film using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP6245032B2 (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107532044B (en) | 2015-05-08 | 2020-12-22 | 阪东化学株式会社 | Optically transparent adhesive sheet, method for producing optically transparent adhesive sheet, laminate, and display device with touch panel |
| JP6163272B1 (en) | 2015-09-29 | 2017-07-12 | バンドー化学株式会社 | Optically transparent adhesive sheet, laminate, laminate production method, and display device with touch panel |
| JP6166851B1 (en) * | 2015-11-26 | 2017-07-19 | バンドー化学株式会社 | Optical transparent adhesive sheet, optical transparent adhesive sheet manufacturing method, laminate, and display device with touch panel |
| JP2017200975A (en) * | 2016-05-06 | 2017-11-09 | 王子ホールディングス株式会社 | Adhesive sheet and laminate |
| JP7132702B2 (en) | 2017-08-30 | 2022-09-07 | リンテック株式会社 | DISPLAY BODY AND METHOD OF MANUFACTURING DISPLAY BODY |
| JP7162431B2 (en) * | 2018-02-27 | 2022-10-28 | 株式会社日本触媒 | Adhesive polymer mixture, method for producing same, adhesive and adhesive product |
| JP7058181B2 (en) * | 2018-06-05 | 2022-04-21 | 日東電工株式会社 | Adhesive composition and adhesive sheet |
| JP6562131B1 (en) * | 2018-07-23 | 2019-08-21 | 東洋インキＳｃホールディングス株式会社 | Adhesive and adhesive sheet |
| CN114854342B (en) * | 2022-05-31 | 2023-07-04 | 安佐化学有限公司 | Adhesive composition for optical member and adhesive optical member |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007169329A (en) * | 2005-12-19 | 2007-07-05 | Saiden Chemical Industry Co Ltd | Adhesive composition for optical use and adhesive sheet |
| JP5083805B2 (en) * | 2007-05-08 | 2012-11-28 | 綜研化学株式会社 | Adhesive composition for surface protective film |
| JP4800363B2 (en) * | 2008-09-26 | 2011-10-26 | 日東電工株式会社 | Adhesive sheet for bonding optical members |
| JP5764334B2 (en) * | 2011-01-27 | 2015-08-19 | 綜研化学株式会社 | Method for producing acrylic polymer, acrylic polymer obtained by this method, and acrylic pressure-sensitive adhesive composition using the same |
| JP5971997B2 (en) * | 2011-04-28 | 2016-08-17 | 日本カーバイド工業株式会社 | Adhesive composition and adhesive sheet |
| JP5636339B2 (en) * | 2011-06-28 | 2014-12-03 | リンテック株式会社 | Adhesive and adhesive sheet |
| JP5929357B2 (en) * | 2012-03-15 | 2016-06-01 | 東洋インキＳｃホールディングス株式会社 | Adhesive and adhesive film using the same |
-
2014
- 2014-03-28 JP JP2014067902A patent/JP6245032B2/en active Active
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