Patent ID: 7285313

Claim:
An acrylic pressure-sensitive adhesive composition for a polarizing film comprising a) 100 parts by weight of an acrylic copolymer prepared from copolymerization of i) 35-94.9 parts by weight of a (meth)acrylic ester monomer for preparing a homopolymer having a glass transition temperature ranging from −45° C. to 10° C. that is at least one selected from the group consisting of n-butyl acrylate, isobutyl acrylate, propylacrylate, ethyl acrylate, methyl acrylate, 3-methylbutyl acrylate, n-hexyl methacrylate, n-octyl methacrylate and n-tetradecyl methacrylate; ii) 5-50 parts by weight of a (meth)acrylic ester monomer for preparing a homopolymer having a glass transition temperature ranging from −90° C. to −50° C. that is at least one selected from the group consisting of n-octyl acrylate, 2-ethylhexyl acrylate, 2-ethylbutyl acrylate, hexyl acrylate, heptyl acrylate, nonyl acrylate, pentyl acrylate, isooctyl acrylate, n-decyl methacrylate and n-dodecyl methacrylate; and iii) 0.1-15 parts by weight of a vinylic monomer, an acrylic monomer or a mixture thereof having a functional group that can be crosslinked, wherein the vinylic monomer is at least one selected from the group consisting of 2-hydroxyethyl (meth)acrylate, 2-hydroxypropyl (meth)acrylate, 2-hydroxyethylene glycol (meth)acrylate and 2-hydroxypropylene glycol (meth)acrylate, and the acrylic monomer is at least one selected from the group consisting of acrylic acid, methacrylic acid, acrylic acid dimer, itaconic acid, maleic acid and maleic anhydride; and b) 0.01-10 parts by weight of a multifunctional crosslinking agent, which is at least one selected from the group consisting of an isocyanate compound, an epoxy compound, an aziridine compound and a metal chelate compound.