POLYURETHANE SILOXANE DENATURALIZED AQUEOUS POLYURETHANE DISPERSED LIQUID, NANO POLYMER COMPOSITE OF NANO CLAY, AND GALVALUME STEEL SHEET WITH A SURFACE TREATMENT COATING LAYER USING THE SAME

摘要

PURPOSE: A siloxane denaturalized polyurethane-clay nano composite is provided to have an excellent mechanical property such as tensile strength and an expansion coefficient and to have an excellent hydrophobic property. A galvalume steel sheet applied a siloxane denaturalized polyurethane-clay nano composite is provided to ameliorate a corrosion problem caused by various external elements as an oxygen penetration rate is low and a hydrophobic property is strong.;CONSTITUTION: A nano polymer composite of a siloxane denaturalized aqueous polyurethane dispersed liquid-nano clay contains siloxane denaturalized polyurethane, and nano clay. The nano clay has a plate structure substituted by an organic substance. The nano clay is added by 0.01-10 weight% per total solid contents which comprises a nano composite. A galvalume steel sheet contains a coated layer which has been surface treatment using a polymer nano composite of siloxane denaturalized aqueous polyuretahane dispersed liquid-nano clay.;COPYRIGHT KIPO 2013;[Reference numerals] (AA) Control group; (BB) Comparison example 1; (C1) Implementation example 1; (C2) Implementation example 2; (C3) Implementation example 3; (C4) Implementation example 4