| 摘要 |
PROBLEM TO BE SOLVED: To provide an adhesive composition having sufficient coating workability and sufficient gripping force.SOLUTION: Provided ia a (meth)acrylic copolymer which, in an x-y coordinate where the following T2-long[μS] is taken as x axis, and F-long[%] as y axis, T2-long[μS]x and F-long[%]y take values in a range surrounded by lines represented by the following formulas (a1) to (a4): x=200 (a1); y=86 (a2); y=0.087x+42.667 (a3); and y=0.085x+18.000 (a4). [T2-long is a spin-spin relaxation time (μS) derived from a relaxation curve having the slowest relaxation when a free induction decay curve, obtained by a Solid Echo method in a pulse NMR (25 MHz) measurement at 30°C, is approximated by a sum of each relaxation curve; and F-long represents a proportion [%] of H atoms having the T2-long.] |
