| 摘要 |
PROBLEM TO BE SOLVED: To provide a tackifier entailing, even in a case where a neutral paper is used as a surface substrate for a re-releasable tacky sheet, neither a cohesive force gain nor a tackifying force loss after an extended storage period.SOLUTION: The provided aqueous re-releasable tackifier includes: (A) acrylic particles having a 50% average particle diameter of 20-60 μm; (B) acrylic particles having a glass transition point of -70 to -45°C and a 50% average particle diameter of 0.1-0.6 μm; and (C) a curative, whereas the acrylic particles (B) are obtained by polymerizing a monomer mixture including acrylic acid, methyl methacrylate, and 2-ethylhexyl acrylate in the presence of (D) an anionic reactive emulsifier and (E) a nonionic inert emulsifier having an ethylene oxide unit repeating number of 7 to 20. |
