Title:
粘着剤層及び粘着フィルム
Document Type and Number:
Japanese Patent JP6926163
Kind Code:
B2
Abstract:
To provide an adhesive layer and an adhesive film which prevent an error in a measurement value of a surface hardness of a laminate having an optical member bonded thereto and which have both durability and reworkability.SOLUTION: The adhesive layer comprises an adhesive composition containing an acrylic polymer. The acrylic polymer contains (1) at least 40 pts.wt of butyl acrylate in total 100 pts.wt of (meth)acrylic monomers as the main component, contains no carboxyl group-containing copolymerizable vinyl monomers, has Tg of -35°C to -10°C, and contains no cyclic nitrogen vinyl compounds having a heterocyclic structure. The adhesive composition comprises (2) an acrylic polymer produced by copolymerizing a hydroxyl group-containing copolymerizable vinyl monomer by 0.1 to 10 pts.wt and having an acid value of 0.1 or less and a weight average molecular weight of 1000000 or more, (3) an isocyanate compound as a crosslinking agent by 0.01 to 1.0 pt.wt, and a silane coupling agent by 0.01 to 0.5 pt.wt. The adhesive layer has a gel fraction of 40 to 85% and a thickness of 1 μm to 20 μm.SELECTED DRAWING: None
Inventors:
Takeshi Nagakura
Ryo Hasegawa
Hiroyuki Yoshida
Hishinuma Masayo
Ryo Hasegawa
Hiroyuki Yoshida
Hishinuma Masayo
Application Number:
JP2019166258A
Publication Date:
August 25, 2021
Filing Date:
September 12, 2019
Export Citation:
Assignee:
Fujimori Industry Co., Ltd.
International Classes:
C09J7/38; C09J7/10; C09J11/06; C09J133/14
Domestic Patent References:
| JP2014118487A | ||||
| JP2012201734A | ||||
| JP2008095064A | ||||
| JP2014234460A | ||||
| JP2010275385A | ||||
| JP2013212657A | ||||
| JP2016164214A | ||||
| JP2016172808A |
Foreign References:
| WO2013176457A1 | ||||
| US20120327510 |
Attorney, Agent or Firm:
Field Saki Satoshi
Kazunori Onami
Tomoyuki Teihiro
Kazunori Onami
Tomoyuki Teihiro