| 摘要 |
The invention concerns compositions for protective anticorrosion treatment of metals containing at least a aqueous film-forming polymer composition at room temperature without co-solvent, plasticizer, and optionally a hexavalent chromium salt or a corrosion inhibitor or an anticorrosion pigment and/or a crosslinking agent. Said dispersions free of organic solvent can be applied on a metal which has been simply degreased or previously passivated. They dry rapidly and produce thin or thick non-sticky coats, which have good water resistance and provide very good protection against corrosion. Said dispersions consist of structured polymer particles having one or more domains with soft character (Tg < 15 DEG C) and one or more domains with hard character (Tg > 55 DEG C). |
