Patent ID: 11958953
Assignee: DONGWOO FINE-CHEM CO., LTD.
Field: Basic materials chemistry (Chemistry)
Classification: CPC C  G | IPC C  G

Claim 0:
1. A hard coating film, comprising:
a substrate; and
a hard coating layer provided on at least one surface of the substrate, wherein the hard coating layer comprises a cured product of a hard coating composition comprising a first photopolymerization initiator having a maximum absorption wavelength of 250 nm or less and a second photopolymerization initiator having a maximum absorption wavelength of 300 nm or less but exceeding 250 nm, and
wherein, when the hard coating film is folded and unfolded 200,000 times with a bending radius of 1 mm in a direction in which the hard coating layer is oriented inwards under 60° C. and 90% relative humidity (RH), breakage does not occur, and an amount of change in transmission b* (chromaticity) of the film after UV irradiation for 100 hr using a 15 W UV-B lamp is 1.5 or less.