Adhesives

As the adhesive, from the viewpoint of the reliability of the adhesive, it may be used particularly preferably an acrylic adhesive. Acrylic adhesive, a tacky component (base polymer) or base resin an acrylic polymer, optionally thereto, crosslinking agents, tackifiers, softening agents, plasticizers, fillers, anti-aging agents, coloring agents suitable additives such as are included. The acrylic polymer, (meth) acrylic acid alkyl ester as a monomer main component, which enables the copolymerization with respect to the optionally (meth) alkyl ester monomer (copolymerizable monomer It has been prepared by using the body). As the (meth) acrylic acid alkyl ester, e.g., (meth) acrylate, (meth) acrylate, (meth) acrylate, propyl (meth) acrylate, isopropyl (meth) acrylate, butyl (meth ) isobutyl acrylate, butyl (meth) s- acrylate, butyl (meth) t- acrylate, (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) octyl acrylate , (meth) acrylate, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, nonyl (meth) acrylate, isononyl (meth) acrylate, decyl (meth) acrylate, isodecyl (meth) acrylic acid undecyl, dodecyl (meth) acrylate, (meth) acrylate, tridecyl Meth) acrylate, tetradecyl (meth) acrylate, pentadecyl (meth) acrylate, hexadecyl (meth) acrylate, heptadecyl (meth) acrylate, octadecyl (meth) acrylate, nonadecyl, such as (meth) eicosyl acrylate ( meth) acrylic acid C _1-20 alkyl esters [preferably (meth) acrylic acid C _4-18 alkyl (linear or branched alkyl) esters] and the like. (Meth) acrylic acid alkyl ester, can be appropriately selected depending on the adhesive of interest. (Meth) acrylic acid alkyl ester may be used alone or in combination.