| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a water-dispersible pressure-sensitive adhesive composition useful for manufacturing a pressure-sensitive adhesive sheet high in coarse face adhesiveness and excellent in balance with other characteristic, and for other application. <P>SOLUTION: The water-dispersible pressure-sensitive adhesive composition contains an acrylic polymer pAx, and an acrylic polymer pAy having 1×10<SP POS="POST">3</SP>-50×10<SP POS="POST">3</SP>of Mw at 100 : 6-35 of mass ratio. The pAx is a copolymer copolymerised with 60-99.5 mass% of 2-18C alkyl (meth)acrylate M1x, and 0.5-12 mass% of functional group containing monomer M2x, and the pAy is a copolymer copolymerised with 60-95 mass% of 2-18C alkyl (meth)acrylate M1y, and 5-40 mass% of functional group containing monomer M2y. A solubility difference ▵SP defined by ¾SPy-SPx¾ is 0.25 (cal/cm<SP POS="POST">3</SP>)<SP POS="POST">1/2</SP>or more, where SPx and SPy represent solubility parameters calculated based on compositions of the M1x and the M1y. <P>COPYRIGHT: (C)2013,JPO&INPIT |
