Title:
HEAT-EXPANSIVE AND REPEELABLE ACRYLIC PRESSURE-SENSITIVE ADHESIVE TAPE OR SHEET
Document Type and Number:
WIPO Patent Application WO/2010/122942
Kind Code:
A1
Abstract:
Provided is a heat-expansive and repeelable acrylic pressure-sensitive adhesive tape which keeps a high dry bond strength in a joined state, regardless of whether the surface of an adherend is even or uneven, and shows a lowering in the bond strength upon heating for disjoining or disjointing the bonded area to thereby facilitate the disjoining or disjointing, characterized in that the disjoining or disjointing can be easily carried out even after storing at a high temperature over a long period of time.
A heat-expansive and repeelable acrylic pressure-sensitive adhesive tape or sheet comprising a viscoelastic body containing air bubbles and microparticles mixed together and a pressure-sensitive adhesive layer containing a heat-expansion agent which is formed at least on one surface of said viscoelastic body, characterized in that the heat-expansion agent comprises heat-expansive microspheres and the glass transition temperature of the shell material of the microspheres is 92oC or higher.
Inventors:
NAKASHIMA TOORU (JP)
YAMANAKA EIJI (JP)
HIGUCHI NAOAKI (JP)
YAMANAKA EIJI (JP)
HIGUCHI NAOAKI (JP)
Application Number:
PCT/JP2010/056754
Publication Date:
October 28, 2010
Filing Date:
April 15, 2010
Export Citation:
Assignee:
NITTO DENKO CORP (JP)
NAKASHIMA TOORU (JP)
YAMANAKA EIJI (JP)
HIGUCHI NAOAKI (JP)
NAKASHIMA TOORU (JP)
YAMANAKA EIJI (JP)
HIGUCHI NAOAKI (JP)
International Classes:
C09J7/02; C09J4/02; C09J11/00; C09J133/00
Domestic Patent References:
| WO1999043758A1 | 1999-09-02 |
Foreign References:
| JP2008120903A | 2008-05-29 | |||
| JP2004181308A | 2004-07-02 | |||
| JP2007262131A | 2007-10-11 | |||
| JP2008144116A | 2008-06-26 | |||
| JP2003176419A | 2003-06-24 | |||
| JPS5717030B2 | 1982-04-08 | |||
| US4223067A | 1980-09-16 | |||
| JPH0748549A | 1995-02-21 | |||
| JP2001212900A | 2001-08-07 | |||
| JP2002088320A | 2002-03-27 | |||
| JP2002003800A | 2002-01-09 | |||
| JP2002121505A | 2002-04-26 | |||
| JP2004018761A | 2004-01-22 | |||
| JP2003013015A | 2003-01-15 |
Other References:
See also references of EP 2423285A4
Attorney, Agent or Firm:
GOTO, YUKIHISA (JP)
Yukihisa Goto (JP)
Yukihisa Goto (JP)
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