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Title:
WATER-DISPERSING ACRYLIC ADHESIVE COMPOSITION AND ADHESIVE SHEET
Document Type and Number:
WIPO Patent Application WO/2011/132567
Kind Code:
A1
Abstract:
Provided is a water-dispersing acrylic adhesive composition that can form a removable adhesive layer with excellent resistance to an increase in adhesive strength over time, appearance traits, and low contamination properties with respect to an adherend. The water-dispersing acrylic adhesive composition contains: an alkyl (meth)acrylate ester, and an unsaturated monomer containing a carboxyl group; an acrylic emulsion polymer having a solvent-insoluble content of at least 70 wt%, and comprising at least one type of monomer as an essential monomer, selected from methyl methacrylate, vinyl acetate and a diethyl acrylamide; and a non-water-soluble crosslinking agent comprising two or more functional groups that can react with the carboxyl group in a molecule. After the acrylic adhesive composition has been applied to a thickness of 50 μm after drying, the solvent-insoluble content of the crosslinked acrylic adhesive film produced by drying the acrylic adhesive composition for two minutes at 120°C, and then aging the acrylic adhesive composition for three days at 50°C is at least 90 wt%, and the rupture elongation is not more than 130% at 23°C.

Inventors:
MORIMOTO YU (JP)
AMANO TATSUMI (JP)
MITSUI KAZUMA (JP)
YONEZAKI KOUSUKE (JP)
IWASAKI KYOKO (JP)
TAKASHIMA ATSUSHI (JP)
Application Number:
PCT/JP2011/059076
Publication Date:
October 27, 2011
Filing Date:
April 12, 2011
Export Citation:
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Assignee:
NITTO DENKO CORP (JP)
MORIMOTO YU (JP)
AMANO TATSUMI (JP)
MITSUI KAZUMA (JP)
YONEZAKI KOUSUKE (JP)
IWASAKI KYOKO (JP)
TAKASHIMA ATSUSHI (JP)
International Classes:
C09J133/00; C09J7/38; C09J11/06; C09J171/02
Foreign References:
JP2006169496A2006-06-29
JP2008024865A2008-02-07
JP2007176961A2007-07-12
JPH01234485A1989-09-19
JP2004091563A2004-03-25
JP2000239632A2000-09-05
JP2007077221A2007-03-29
JPH11961A1999-01-06
JP2001064607A2001-03-13
JP2001131512A2001-05-15
JP2003027026A2003-01-29
JP3810490B22006-08-16
JP2004091563A2004-03-25
JP2006169496A2006-06-29
JP2007031585A2007-02-08
JP2006045412A2006-02-16
Other References:
"TETRAD-C", MITSUBISHI GAS CHEMICAL COMPANY, INC.
See also references of EP 2562228A4
Attorney, Agent or Firm:
GOTO, YUKIHISA (JP)
Yukihisa Goto (JP)
Download PDF:
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Claims:



 
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