SILICON-CONTAINING ZINC RICH HYBRID JAPANESE LACQUER COMPOSITION

PROBLEM TO BE SOLVED: To provide a new rustproof coating composition which has improved adhesiveness to steel materials provided by hybridized Japanese lacquer and develops excellent rustpreventive ability as a result of a synergistic effect of the chelation with iron by the anion effect of Urushiol contained in a Japanese lacquer liquid and a sacrificial anode of zinc powder, by using a natural silicon-containing hybrid Japanese lacquer for a binder to fix zinc powder. SOLUTION: A rust preventive agent compatible with environment can be obtained by adding a silane compound or a silicate compound with one substitution and three functionalities to a purified Japanese lacquer with reduced moisture (Kurome-Urushi) or a Japanese lacquer prepared by heating the same at 90°C-100°C for 2-3 hours to hybridize them, and adding zinc powder singly or in combination with aluminum powder, magnesium powder, a suspending agent and an appropriate amount of a diluent to the resultant hybridized Japanese lacquer. COPYRIGHT: (C)2004,JPO&NCIPI