Posco

Jung Hwan Lee

Jin Tae Kim

Hye Jin Yoo

Chang Se Byeon

Jong-Sang Kim

Jae Ryung Lee

Jung Su Kim

In Woo Cheong

Jong Sang Kim

Jin Ho Jung

Bong Woo Ha

Yang Ho Choi

Provided is a resin composition for an under coat of an UV coating layer and a coated steel sheet using the resin composition. The coated steel sheet comprises a material steel sheet; an under coat layer including a cured product of a resin composition for the under coat layer which contains a main resin and a metal powder, the under coat layer being formed on one side or both sides of the material steel sheet; and a top coat layer formed on the under coat layer and containing a radical compound, thereby providing a superior appearance, scratch resistance, corrosion resistance and superior weldability.

Coated steel sheet having superior welding, scratch-resistance, and corrosion-resistance properties

A method of treating a surface of a substrate using modified urushiol derived fromis provided. More particularly, the reactivity of a hydroxyl group of urushiol extracted from freshis removed before the lacquer is used as a UV coating agent for a substrate such as a steel sheet. Therefore, the substrate may have high antibacterial activity, and excellent appearance and functionalities such as far-infrared radiation, blocking of electromagnetic waves, enhanced corrosion resistance, high crosslinking speed when a low content of a photoinitiator is used, excellent surface gloss and high scratch resistance.

[object Object]

Growing community of inventors

Gwangyang-si, South Korea

Jung Hwan Lee