Title:
PRESSURE-SENSITIVE ADHESIVE SHEET
Document Type and Number:
WIPO Patent Application WO/2012/141101
Kind Code:
A1
Abstract:
Provided is a removable pressure-sensitive adhesive sheet that is highly scratch-resistant, is resistant to whitening (moisture-absorption whitening) when stored in humid conditions, and has excellent appearance characteristics and antistatic performance. Said pressure-sensitive adhesive sheet has an acrylic pressure-sensitive adhesive layer on at least one surface of a transparent film substrate and is characterized in that: said transparent film substrate has a base layer comprising a resin material and a top-coat layer provided on a first surface of said base layer; said top-coat layer comprises a polythiophene, an acrylic resin, and a melamine cross-linker, with the average thickness (Dave) of said top-coat layer being 2 to 50 nm and the amount of variation (ΔD) in said thickness being no more than 40%; and the aforementioned acrylic pressure-sensitive adhesive layer is formed from a water-dispersed acrylic pressure-sensitive removable-adhesive composition containing an acrylic emulsion polymer that is polymerized using a reactive emulsifier containing a radical-polymerizable functional group and comprises feedstock monomers including an alkyl (meth)acrylate ester (A) and a carboxyl-group-containing unsaturated monomer (B), with said alkyl (meth)acrylate ester (A) constituting 70% to 99.5% and said carboxyl-group-containing unsaturated monomer (B) constituting 0.5% to 10% of the total weight of the feedstock monomers.
Inventors:
AMANO TATSUMI (JP)
MORIMOTO YU (JP)
MITSUI KAZUMA (JP)
YONEZAKI KOUSUKE (JP)
TAKASHIMA KYOKO (JP)
MORIMOTO YU (JP)
MITSUI KAZUMA (JP)
YONEZAKI KOUSUKE (JP)
TAKASHIMA KYOKO (JP)
Application Number:
PCT/JP2012/059527
Publication Date:
October 18, 2012
Filing Date:
April 06, 2012
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
AMANO TATSUMI (JP)
MORIMOTO YU (JP)
MITSUI KAZUMA (JP)
YONEZAKI KOUSUKE (JP)
TAKASHIMA KYOKO (JP)
AMANO TATSUMI (JP)
MORIMOTO YU (JP)
MITSUI KAZUMA (JP)
YONEZAKI KOUSUKE (JP)
TAKASHIMA KYOKO (JP)
International Classes:
C09J7/29; C09J9/02; C09J11/06; C09J133/08; C09J171/02; C09J165/00
Domestic Patent References:
| WO2006035684A1 | 2006-04-06 |
Foreign References:
| JP2010270194A | 2010-12-02 | |||
| JP2006119349A | 2006-05-11 | |||
| JP2008194886A | 2008-08-28 | |||
| JPH05331431A | 1993-12-14 | |||
| JP2007070401A | 2007-03-22 |
Attorney, Agent or Firm:
GOTO, YUKIHISA (JP)
Yukihisa Goto (JP)
Yukihisa Goto (JP)
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Claims: