Title:
ADHESIVE SHEET, ADHESIVE SHEET WITH MOLD RELEASE FILM, AND ADHESIVE SHEET FOR FLEXIBLE IMAGE DISPLAY DEVICE CONSTITUENT MEMBERS
Document Type and Number:
WIPO Patent Application WO/2023/189573
Kind Code:
A1
Abstract:
The present invention provides, as an adhesive sheet having excellent flexibility and excellent oil resistance, an adhesive sheet which is provided with an adhesive layer that is formed of an adhesive composition that contains a (meth)acrylic copolymer (A), a photocurable compound (B) and a photopolymerization initiator (C), wherein: the (meth)acrylic copolymer (A) contains a constituent unit derived from an alkyl (meth)acrylate (a1) that has a linear and/or branched alkyl group having 3 to 6 carbon atoms and a constituent unit derived from a (meth)acrylate (a2) that has a lower glass transition temperature than the alkyl (meth)acrylate (a1); the ratio of the constituent unit derived from an alkyl (meth)acrylate (a1) is 20% by mass to 60% by mass; the content mass ratio (W(a2)/W(a1)) of the constituent unit derived from a (meth)acrylate (a2) to the constituent unit derived from an alkyl (meth)acrylate (a1) is 0.3 to 3.0; and the shear storage elastic modulus (G') at -20°C is 800 kPa or less.
Inventors:
MINEMOTO MASAYA (JP)
Application Number:
PCT/JP2023/009981
Publication Date:
October 05, 2023
Filing Date:
March 15, 2023
Export Citation:
Assignee:
MITSUBISHI CHEM CORP (JP)
International Classes:
C09J4/06; C09J7/10; C09J7/38; C09J133/08; G09F9/00
Domestic Patent References:
| WO2020175091A1 | 2020-09-03 | |||
| WO2020175096A1 | 2020-09-03 | |||
| WO2020122229A1 | 2020-06-18 | |||
| WO2021100635A1 | 2021-05-27 |
Foreign References:
| JP2020045443A | 2020-03-26 | |||
| JP2022144651A | 2022-10-03 | |||
| JP2023034108A | 2023-03-13 |
Attorney, Agent or Firm:
SAITOH Yukihiko et al. (JP)
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