Title:
ADHESIVE SHEET, FLEXIBLE IMAGE DISPLAY MEMBER, AND FLEXIBLE IMAGE DISPLAY DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/176607
Kind Code:
A1
Abstract:
Provided is an adhesive sheet in which interlayer stress can be reduced when the sheet is folded, especially in a low temperature state, which exhibits excellent durability for suppressing cracks in a member sheet or flexible member, and which exhibits excellent recoverability such that the sheet rapidly recovers to a flat state after being folded. This adhesive sheet is formed from an adhesive composition containing a (meth)acrylic acid ester copolymer and a crosslinking agent. The (meth)acrylic acid ester copolymer contains, as constituent components of the copolymer, (A) a branched chain or straight chain alkyl (meth)acrylate ester monomer having 1-20 carbon atoms, (B) a monomer which has an alkylene glycol group in the molecule and also has a (meth)acryloyl group, and (C) a nitrogen-containing vinyl monomer. The adhesive sheet has a storage shear modulus at -30ºC (G'(-30ºC)), as determined by means of dynamic viscoelasticity measurements in shearing mode at a frequency of 1 Hz, of 250 kPa or less, and has a strain recovery rate (400%, 1 minute) of 70% or more.
Inventors:
YAMASHITA SHO (JP)
TABATA DAIKI (JP)
TABATA DAIKI (JP)
Application Number:
PCT/JP2023/008712
Publication Date:
September 21, 2023
Filing Date:
March 08, 2023
Export Citation:
Assignee:
MITSUBISHI CHEM CORP (JP)
International Classes:
C09J7/38; C09J11/06; C09J133/04; C09J175/14; G09F9/00; G09F9/30
Foreign References:
| JP2017119801A | 2017-07-06 | |||
| JP2020131565A | 2020-08-31 | |||
| JP2020138375A | 2020-09-03 | |||
| US20170166786A1 | 2017-06-15 |
Attorney, Agent or Firm:
SAITOH Yukihiko et al. (JP)
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