Title:
DOUBLE-SIDED PRESSURE-SENSITIVE ADHESIVE SHEET
Document Type and Number:
WIPO Patent Application WO/2023/282010
Kind Code:
A1
Abstract:
[Problem] To provide a double-sided pressure-sensitive adhesive sheet having excellent impact resistance, high shear adhesive force, and excellent initial tackiness. [Solution] A double-sided pressure-sensitive adhesive sheet 1 includes a pressure-sensitive adhesive layer 2, wherein the pressure-sensitive adhesive layer 2 is an active-ray-curable acrylic pressure-sensitive adhesive layer comprising an acrylic polymer as a base polymer. The acrylic polymer comprises 50 mass% or more constituent units derived from an alkyl (meth)acrylate (A) in which the alkyl group is a linear or branched C2-C7 alkyl. The pressure-sensitive adhesive layer 2 has a glass transition temperature of 0°C or higher, a -20°C storage modulus G' of 10 MPa or greater, and a 65°C storage modulus G' of 0.05 MPa or greater. The double-sided pressure-sensitive adhesive sheet 1 has a 180° peel strength in application to a stainless-steel plate of 20 N/20 mm or greater when examined at 23°C in the state of having a 50 μm-thick poly(ethylene terephthalate) film adherent to one pressure-sensitive adhesive surface thereof.
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Inventors:
KATO NAOHIRO (JP)
IMOTO EIICHI (JP)
NISHIWAKI MASATAKA (JP)
YAMAMOTO KENICHI (JP)
WATANABE SHIGEKI (JP)
IMOTO EIICHI (JP)
NISHIWAKI MASATAKA (JP)
YAMAMOTO KENICHI (JP)
WATANABE SHIGEKI (JP)
Application Number:
PCT/JP2022/024106
Publication Date:
January 12, 2023
Filing Date:
June 16, 2022
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
International Classes:
C09J7/38; C09J133/00
Domestic Patent References:
| WO2017159789A1 | 2017-09-21 |
Foreign References:
| US20170166786A1 | 2017-06-15 | |||
| US20190308924A1 | 2019-10-10 | |||
| KR20160135023A | 2016-11-24 | |||
| JP2019510851A | 2019-04-18 | |||
| JP2014047254A | 2014-03-17 | |||
| KR20170097856A | 2017-08-29 | |||
| KR20170120853A | 2017-11-01 |
Attorney, Agent or Firm:
G-CHEMICAL INTELLECTUAL PROPERTY FIRM (JP)
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