Adhesive for polarizing plate and polarizing plate having adhesive layer
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United States of America Patent
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May 29, 2012
Grant Date -
Aug 19, 2010
app pub date -
Jul 10, 2008
filing date -
Jul 11, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An adhesive composition for polarizing plates in which an acrylic polymer, a tin compound having a dialkyl group and serving as a cross-linking accelerator and an isocyanate cross-linker are dissolved in an organic solvent, the acrylic polymer being formed by copolymerization of monomers containing an alkyl (meth)acrylate, a hydroxyl group containing monomer and/or a carboxyl group containing monomer, wherein preferably, a solution containing 30% by weight of the acrylic polymer which constitutes the adhesive composition, dissolved in 70% by weight of ethyl acetate has a viscosity in the range of 0.5 to 10.0 Pa·s measured at 23° C., and the acrylic polymer has a weight-average molecular weight in the range of 300,000 to 700,000.
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