Title:
再剥離型粘着剤組成物、及び粘着テープ又はシート
Document Type and Number:
Japanese Patent JP4493643
Kind Code:
B2
Abstract:
The present invention relates to a pressure-sensitive adhesive tape or sheet, which comprises a substrate and a pressure-sensitive adhesive layer disposed on at least one side of the substrate,
wherein the substrate is a soft polyvinyl chloride-based substrate,
wherein the pressure-sensitive adhesive layer is formed by a removable pressure-sensitive adhesive composition comprising an acrylic polymer having a hydroxyl group, a photopolymerization initiator having a hydroxyl group, and a crosslinking agent having an isocyanate group, wherein the acrylic polymer and the photopolymerization initiator each are chemically bonded to the crosslinking agent, and said chemical bond between the acrylic polymer and the crosslinking agent and said chemical bond between the photopolymerization initiator and the crosslinking agent each are a chemical bond between an isocyanate group and a hydroxyl group, and
wherein the pressure-sensitive adhesive tape or sheet has an adhesion strength (against a mirror silicon wafer, peeling angle: 15°, pulling rate: 150 mm/min) after storage at 50°C for 1 month after preparation and after ultraviolet light irradiation (irradiation time: 20 seconds, irradiation intensity: 500 mJ/cm 2 ) of 2.3 N/25mm width or less.
Inventors:
Takatoshi Sasaki
Fumiaki Asai
Toshiro Shintani
Tomoichi Takahashi
Fumiaki Asai
Toshiro Shintani
Tomoichi Takahashi
Application Number:
JP2006328928A
Publication Date:
June 30, 2010
Filing Date:
December 06, 2006
Export Citation:
Assignee:
NITTO DENKO CORPORATION
International Classes:
C09J133/00; C09J4/00; C09J7/02; C09J11/06; C09J155/00; C09J175/04; H01L21/301
Domestic Patent References:
| JP2000044890A | ||||
| JP2006160996A | ||||
| JP2002069409A | ||||
| JP6061346A | ||||
| JP2005239856A | ||||
| JP2005113154A |
Attorney, Agent or Firm:
Yukihisa Goto