Patent ID: 8318859

Claim:
A pressure-sensitive adhesive composition comprising an ionic liquid, and a (meth)acryl-based polymer containing, as a monomer component, 0.01 to 20% by weight of a reactive surfactant shown by the following general formula (I) as a monomer unit: wherein R 1 , R 2 , and R 3 indicate likewise or differently hydrogen or the methyl group, R 4 indicates an alkylene group of 0 to 30 in carbon number (further, 0 in carbon number means that there is no R 4 ), R 5 and R 6 indicate likewise or differently alkylene groups of 1 to 30 in carbon number, m indicates the number of 0 to 50 (may not be an integer), n indicates the number of 5 to 100 (may not be an integer), m+n indicates the number of 5 to 150 (may not be an integer), and X is hydrogen.