Patent ID: 9018303
Filing Date: 2015-04-28
Classification: C09J,C09K,Y10T

Abstract:
1. An acrylic pressure-sensitive adhesive composition for protective film of polarizing plate, comprising: a) acrylic copolymers; b) a hydrophilic plasticizer; and c) a hydrophobic plasticizer, wherein the hydrophilic plasticizer is one or more selected from the group consisting of polyoxy alkylene fatty acid esters, polyoxy alkylene alkyl ethers, polyoxy alkylene alkyl allyl ethers, polyoxy alkylene alkyl phenyl ether, polyoxy alkylene alkyl amines, polyoxy alkylene amine fatty acid esters, polyoxy alkylene alkyl ether sulfuric ester salts, polyoxy alkylene alkyl ether phosphates, polyoxy alkylene alkyl phenyl ether sulfates, and polyoxy alkylene alkyl phenyl ether phosphates, wherein the hydrophobic plasticizer is one or more selected from the group consisting of di-butyl phthalate (DBP), di-iso-nonyl phthalate (DINP), di-iso-decyl phthalate (DIDP),di-2-ethylhexyl adipate (DOA), di-iso-nonyl adipate (DINA), tri-2-ethylhexyl trimellitate (TOTM), and di-butyl oxalate, wherein the molar ratio of the hydrophilic plasticizer to the hydrophobic plasticizer is 1:1.000 to 1:0.1, wherein the sum of the hydrophilic plasticizer and the hydrophobic plasticizer is 0.05 to 10 parts by weight relative to 100 parts by weight of the acrylic copolymer, wherein haze value, which is measured with reflectance-transmittance meter, after a protective film prepared using the acrylic pressure-sensitive adhesive composition is impregnated with de-ionized water at room temperature and left for 1 hour, and then moisture covered around the protective film is removed, is 3.6% and less, and wherein wettability, which is measured as a time for a pressure-sensitive adhesive surface to be adhered, when the protective film is released by hand and then adhered again, after the protective film is adhered to a triacetyl cellulose surface or an antiglare layer surface of a polarizing plate with a 2 kg roller, based on JIS Z 0237 , and stored under condition at a temperature of 23° C. and a relative humidity of 65% for 24 hours, is 10 seconds and less.