Resin Composition for Pre-Coated Steel Sheet, Preparing Method of Pre-coated Steel Sheet and Steel Sheet Having Excellent Formability, Heat resistance and Corrosion Resistance Properties

摘要

A resin composition for a pre-coated steel sheet having good processibility, heat resistance, and corrosion resistance, and a pre-coated steel sheet fabricated by using the resin composition are disclosed. The resin composition includes a 10 to 40 parts by weight of a hardener comprising end-capped blocked polyisocyanate and a melamine resin by 2:1 to 3:1 by parts by weight and 0.1 to 10 parts by weight of organized layered nano-clay, based on a 100 parts by weight of a base resin. The pre-coated steel sheet obtained by the method exhibits good processibility, heat resistance, and corrosion resistance.