Composition for primer coating, optical film comprising the same, and polarizing plate comprising the same

摘要

The present invention relates to a primer coating composition, an optical film including the same, and a polarizing plate including the same, the primer coating composition according to the present invention includes 1) a polyvinyl alcohol compound including the acetoacetyl group; 2) an acrylate compound that includes at least two vinyl groups; and 3) a basic catalyst, and an optical film that includes a primer layer formed from the primer coating composition has excellent transparency, optical property, mechanical strength, and attaching property to the polyvinyl alcohol polarizer.

主权项

1. A polarizing plate comprising:
1) a polyvinylalcohol polarizer; 2) a film that is provided on at least one side of the polarizer and includes a (meth)acryl resin; and 3) a primer layer that is formed by a primer coating composition disposed on a side of the film that contacts the polarizer, wherein the primer coating composition includes:
a polyvinyl alcohol compound including an acetoacetyl group having a degree of denaturing of 0.1 to 40 mole %;an acrylate compound including at least two vinyl groups;a basic catalyst; and0.5 to 1.5 parts by weight of a photocuring initiator, relative to 100 parts by weight of the acrylate compound, wherein the content of the acrylate compound is 0.1 to 2 equivalents on the basis of the acetoacetyl group of the polyvinyl alcohol compound in the primer coating composition, and wherein the content of the basic catalyst is 0.1 to 1 equivalents on the basis of the acetoacetyl group of the polyvinyl alcohol compound in the primer coating composition.