Polyester-based primer composition, optical film and polarizing plate comprising

摘要

There is provided a polyester-based primer composition including 100 parts by weight of a polyester resin, 1 to 20 parts by weight of water-dispersible particles, and water as a remainder. Since a polyester-based primer composition of the present disclosure is excellent in water resistance and solvent resistance differently from a urethane primer composition, the polyester-based primer composition may obtain sufficient adhesive strength between a protection film and a functional coating layer even without assistance from additives such as a cross-linking agent, and may retain stable adhesive strength for a long period of time.

主权项

1. A polyester-based primer composition comprising:
100 parts by weight of a polyester resin comprising repeating units represented by the following Formula 1; 1 to 20 parts by weight of water-dispersible particles; and water as a remainder,where R1 and R2 independently refer to hydrogen, a substituted or unsubstituted C1-20 alkyl, a substituted or unsubstituted C1-20 aryl, or a substituted or unsubstituted C3-20 cycloalkyl; R3 and R4 independently refer to hydrogen, a substituted or unsubstituted C1-20 alkyl, a substituted or unsubstituted C1-20 aryl, a substituted or unsubstituted C3-20 cycloalkyl, a carboxyl group, a hydroxyl group, or a sulfonate group; and at least one of R3 and R4 refers to a carboxyl group, a hydroxyl group, or a sulfonate group.