Adhesive sheet, manufacturing method thereof, optical filter and plasma display panel

摘要

The present invention relates to an adhesive sheet, a manufacturing method thereof, an optical filter and a plasma display panel. The present invention provides an adhesive sheet having an excellent base adhesion property through a hydroxyl group applied to a base film and an isocyanate-based compound contained in an adhesive layer through a corona processing. Accordingly, the present invention provides an adhesive sheet having an excellent base adhesion property and improved high temperature stability by using a carboxyl group-containing acryl-based copolymer having a high glass transition temperature. Further, the adhesive sheet of the present invention contains a siloxane-based compound if needed, thus preventing an initial peeling force from being increased. Accordingly, the present invention provides an adhesive sheet with an excellent base adhesion property, high temperature stability, adhesive property and reworkability to glass, and provides a manufacturing method thereof, an optical filter containing the same and a plasma display panel.

主权项

1. A pressure-sensitive adhesive sheet comprising:
a base film having a corona-treated layer, into which hydroxyl groups are introduced, on one or both sides thereof; and a pressure-sensitive adhesive layer which is formed on the corona-treated layer of the base film, and which includes a cured product of a pressure-sensitive adhesive composition comprising a carboxyl group-containing acrylic copolymer; a multifunctional isocyanate compound capable of reacting with the hydroxyl groups of the corona-treated layer; a hardener selected from the group consisting of an epoxy hardener and an aziridine hardener; and 0.001 to 0.01 parts by weight of a siloxane compound relative to 100 parts by weight of the carboxyl group-containing acrylic copolymer, wherein the carboxyl group-containing acrylic copolymer comprises 85 to 99.9 parts by weight of a (meth)acrylic acid ester monomer including a hydrocarbon group having 1 to 12 carbon atoms and 0.1 to 15 parts by weight of a carboxyl group-containing monomer, relative to 100 parts by weight of the acrylic copolymer, wherein the hardener is comprised in the pressure-sensitive adhesive composition in an amount of 0.01 to 0.03 parts by weight relative to 100 parts by weight of the acrylic copolymer, and wherein the multifunctional isocyanate compound of the pressure-sensitive adhesive layer reacts with the hydroxyl groups of the corona-treated layer, and the hardener forms a crosslinking structure by reacting with the carboxyl group of the acrylic copolymer.