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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12173199 B1

PDFFull Text
Date of Patent:
Dec. 24, 2024

Filed:

Jan. 20, 2021

Photocurable adhesive sheet, adhesive sheet laminate, laminate for image display device, and image display device

Applicant:

Mitsubishi Chemical Corporation, Tokyo, JP;

Inventors:

Kahoru Ishii, Tokyo, JP;

Daiki Nozawa, Tokyo, JP;

Makoto Inenaga, Tokyo, JP;

Assignee:

Mitsubishi Chemical Corporation, Tokyo, JP;

Attorney:

Oblon, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

Scott R Walshon

Int. Cl.
CPC ...
C09J 7/24 (2018.01); C08F 2/50 (2006.01); C08F 220/14 (2006.01); C08F 220/18 (2006.01); C08F 220/20 (2006.01); C08F 220/56 (2006.01); C08F 222/10 (2006.01); C08K 5/132 (2006.01); C08K 5/5397 (2006.01); C08L 51/00 (2006.01); C09J 7/40 (2018.01);
U.S. Cl.
CPC ...
C09J 7/245 (2018.01); C08F 2/50 (2013.01); C08F 220/14 (2013.01); C08F 220/1811 (2020.02); C08F 220/20 (2013.01); C08F 220/56 (2013.01); C08F 222/102 (2020.02); C08F 222/103 (2020.02); C08F 222/104 (2020.02); C08K 5/132 (2013.01); C08K 5/5397 (2013.01); C08L 51/003 (2013.01); C09J 7/40 (2018.01); C08L 2312/06 (2013.01); C09J 2203/318 (2013.01); C09J 2301/124 (2020.08); C09J 2451/001 (2013.01); C09J 2467/005 (2013.01);
Abstract

A photocurable adhesive sheet may have both step conformability and shape stability and excellent in durability after attachment to an adhering member. Such a photocurable adhesive sheet may include a first adhesive layer, a second adhesive layer, and an intermediate layer interposed between the first and second adhesive layer. The intermediate layer may be a layer that is formed from a resin composition containing a (meth)acrylic copolymer as a main component resin and has a crosslinked structure. The first and/or second adhesive layer may be photocurable resin layers formed from a photocurable resin composition. The fall time in the measurement of holding force at 40° C. under a load of 1 N/cmmay be 60 minutes or more, while the fall time in the measurement of holding force at 60° C. under a load of 1 N/cmmay be less than 60 minutes.

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