Pressure-sensitive adhesive polarizing plate
As a pressure-sensitive adhesive polarizing plate, for example, a pressure-sensitive adhesive polarizing plate allowing a pressure-sensitive adhesive layer in the polarizing plate to have an excellent interfacial adhesion with another layer and have no detachment phenomenon can be provided in the present application.
1. A pressure-sensitive adhesive polarizing plate, comprising:
a polarizer; and
a pressure-sensitive adhesive layer which is formed on one surface of the polarizer and formed of a cross-linkable composition comprising an acrylic pressure-sensitive adhesive resin and includes a polyalkylene polyol compound having 3 or more hydroxyl groups,
wherein the polyalkylene polyol compound is represented by the following Formula 1 and wherein the polyalkylene polyol compound has a weight average molecular weight of 30,000 or less:
(HO n A B) m [Formula 1]
where A is a core including a polyalkylene oxide unit, B is a chain represented by the following Formula 2, m is an integer of 1 or more, n is an integer of 0 or more, and the sum (m+n) of m and n is 3 or more:
L 1 -Q 1 -L 2 O-A 1 x y L 3 -Q 2 -L 4 A 2 -O z -A 3 -OH [Formula 2]
where A 1 to A 3 each independently represent an alkylene group, Q 1 and Q 2 represent an aliphatic or aromatic divalent residue, L 1 to L 4 represent linkers, x is an integer of 1 or more, y is an integer of 0 or more, and z is an integer of 1 or more.
2. The pressure-sensitive adhesive polarizing plate of claim 1 , wherein the acrylic pressure-sensitive adhesive resin includes a carboxyl group, and the pressure-sensitive adhesive layer further includes a crosslinking agent.
3. The pressure-sensitive adhesive polarizing plate of claim 1 , wherein the polyalkylene polyol compound includes a polyalkylene oxide unit represented by the following Formula 3:
where L is a linear or branched alkylene group having 2 to 12 carbon atoms.
4. The pressure-sensitive adhesive polarizing plate of claim 1 , wherein the core of the compound of Formula 1 has a weight average molecular weight in a range of 1,000 to 10,000.
5. The pressure-sensitive adhesive polarizing plate of claim 1 , wherein the core (A) of Formula 1 includes a polyethylene oxide unit and a polypropylene oxide unit.
6. The pressure-sensitive adhesive polarizing plate of claim 5 , wherein a ratio (P/E) of a number of moles (P) of the polypropylene oxide unit to a number of moles (E) of the polyethylene oxide unit in the core is in a range of 1 to 10.
7. The pressure-sensitive adhesive polarizing plate of claim 1 , wherein one or more of the linkers of Formula 2 is an oxygen atom, a sulfur atom, an alkylene group, an alkenylene group or an alkynylene group, or is represented by the following Formula 4 or 5:
where R 1 and R 2 each independently represent a hydrogen atom or an alkyl group.
8. The pressure-sensitive adhesive polarizing plate of claim 1 , wherein the pressure-sensitive adhesive layer further includes an ionic compound.
9. The pressure-sensitive adhesive polarizing plate of claim 8 , wherein the ionic compound has an octanol-water partition coefficient of 4 or more.
10. The pressure-sensitive adhesive polarizing plate of claim 8 , wherein the ionic compound has a cation with a cation-water binding energy in a range of 0 to 0.6 Kcal/mol.
11. The pressure-sensitive adhesive polarizing plate of claim 1 , wherein the pressure-sensitive adhesive layer further includes an isocyanate compound.
12. A pressure-sensitive adhesive layer-coated polarizing plate, comprising at least:
a polarizing film having a transparent protective film formed on one or both surfaces of a polarizer; and
a pressure-sensitive adhesive layer,
wherein the pressure-sensitive adhesive layer is formed of a pressure-sensitive adhesive composition containing a (meth)acrylic polymer and an ionic compound with an anion component and a cation component,
the (meth)acrylic polymer is an aromatic ring-containing (meth)acrylic polymer having an aromatic ring-containing alkyl (meth)acrylate as a monomer unit, and
the pressure-sensitive adhesive composition further includes a polyalkylene polyol compound having 3 or more hydroxyl groups,
wherein the polyalkylene polyol compound is represented by the following Formula 1 and wherein the polyalkylene polyol compound has a weight average molecular weight of 30,000 or less:
where A is a core including a polyalkylene oxide unit, B is a chain represented by the following Formula 2, m is an integer of 1 or more, n is an integer of 0 or more, and the sum (m+n) of m and n is 3 or more:
where A 1 to A 3 each independently represent an alkylene group, Q 1 and Q 2 represent an aliphatic or aromatic divalent residue, L 1 to L 4 represent linkers, x is an integer of 1 or more, y is an integer of 0 or more, and z is an integer of 1 or more.