ACRYLIC PRESSURE-SENSITIVE ADHESIVE COMPOSITION FOR POLARIZING PLATE, CONTAINING A PHOTO-INITIATOR GROUP

摘要

The present invention relates to an acrylic pressure-sensitive adhesive composition which comprises a (meth)acrylic copolymer comprising an alkyl(meth)acrylic add ester monomer, in which alkyl has 2 to 14 carbon atoms, and a (meth) acrylic acid ester monomer containing a copolymerizable photo-initiator group, wherein it has a gel fraction of 10 to 55% and a swelling ratio of 30 to 110, and a sol (uncross-linked polymer) eluted in final pressure-sensitive adhesive with a solvent (ethyl acetate) has a weight average molecular weight of 600,000 or more; and a polarizing plate and a liquid crystal display device, comprising the same. The polarizing plate according to the present invention has an excellent adhesion durability under a high temperature or a high temperature and humidity condition, has an excellent low light leakage property by effectively providing stress release property, and may greatly improve productivity for polarizing plates, by using photo-curing.