| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a pressure-sensitive adhesive sheet which, by performing polymerization in the presence of a specified reaction initiator, can be reduced in the amounts of monomer and reaction initiator remaining in the acrylic polymer without long-time drying and can thereby reduce ITO corrosion due to the remaining monomer and reaction initiator. <P>SOLUTION: There is provided a pressure-sensitive adhesive sheet for electro-conductive films which is composed of a base sheet and a pressure-sensitive adhesive layer formed on any one of the surfaces of the base sheet, which pressure-sensitive adhesive sheet is characterized in that the pressure-sensitive adhesive from which the pressure-sensitive adhesive layer is formed comprises a cross-linked acrylic pressure-sensitive adhesive prepared by cross-linking an acrylic polymer prepared by copolymerizing a monomer mixture containing 20-99.4 wt.% (a-1) alkoxy (meth)acrylate, 0.5-10 wt.% (a-2) hydroxyl-containing monomer, 0.1-5 wt.% (a-3) nitrogen-containing monomer, and 0-79.4 wt.% (a-4) alkyl (meth)acrylate in the presence of a reaction initiator or reaction initiators added in at least two divided portions, the reaction initiator divided in portions and added last is a peroxide type initiator having a 10-hour half-life temperature falling within the range of 40-80°C, having functional groups other than carboxyl groups, and having a specified molecular weight in the presence of 0.1-5 pts.wt., per 100 pts.wt. acrylic polymer, isocyanate cross-linking agent; the calculated amount of the remaining reaction initiator is 500 ppm or less; and the amount of unreacted monomer contained in the pressure-sensitive adhesive layer is 50 mg/m<SP POS="POST">2</SP>or less when the thickness of the pressure-sensitive layer on the pressure-sensitive sheet is taken as 50μm. <P>COPYRIGHT: (C)2013,JPO&INPIT</p> |
