| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an adhesive composition having improved coatability and keeping the durability without particularly increasing the amount of solvent in coating, an adhesive layer produced by using the composition and a method for producing the composition, etc. <P>SOLUTION: The adhesive composition contains an acrylic polymer containing ≥60 wt.% alkyl acrylate having a 1-9C alkyl group as a monomer unit, having a weight-average molecular weight of ≥1,500,000 and containing ≥20 wt.% component having a molecular weight of ≤100,000, and an organic solvent. The composition contains a poor solvent having a solubility parameter (SP value) δ2 [(J/cm<SP>3</SP>)<SP>1/2</SP>] satisfying the formula: +1.7≤Δδ(=δ1-δ2)≤+5 wherein δ1 [(J/cm<SP>3</SP>)<SP>1/2</SP>] is the solubility parameter (SP value) of the homopolymer of the monomer constituting the main part of the acrylic polymer. The amount of the poor solvent is 20-60 wt.% of the total organic solvent. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
