| 摘要 |
PROBLEM TO BE SOLVED: To provide a pressure-sensitive adhesive composition capable of attaining a pressure-sensitive adhesive tape which can suppress the strain of an optical film even when left at a high temperature, on fixing the optical film to an adherend, and which can suitably fix the optical film free from lifting and peeling.SOLUTION: The water-dispersed pressure-sensitive acrylic adhesive composition is prepared by mixing: a water-dispersed pressure-sensitive acrylic adhesive composition (A) which contains an in-particle cross-linked acrylic copolymer emulsion particle (a) in an aqueous medium, and has a storage elastic modulus Ga' after dried of ≥3,000 and <6,000 Pa as measured at a frequency of 0.005 Hz and at 85°C; and a water-dispersed pressure-sensitive acrylic adhesive composition (B) which contains an in-particle cross-linked acrylic copolymer emulsion particle (b) in an aqueous medium, and has a storage elastic modulus Gb' after dried of ≥6,000 and <50,000 Pa as measured at a frequency of 0.005 Hz and at 85°C, and the water-dispersed pressure sensitive acrylic adhesive compostion has a storage elastic modulus G' after dried of 4,000-9,000 Pa as measured at a frequency of 0.005 Hz and at 85°C. |
