Chromium-free, metal surface-treating composition and surface-tr

Details Chromium-free, metal surface-treating composition and surface-tr Chromium-free, metal surface-treating composition and surface-tr

1997-01-29

2000-03-21

Chen, Vivian

Stock material or miscellaneous articles

Composite

Of epoxy ether

428416, 428457, 428458, 428463, 428469, 428471, 428472, 4284723, 428483, 428515, 428520, 428522, 106 1405, 106 1412, 106 1421, 106 1444, 148240, 148243, 148251, 148253, B32B 1508, B32B 2708, B32B 2718, B32B 2730

Patent

active

060400544

ABSTRACT:
A chromium-free composition for treating metal surface comprising (a) a hydroxyl group-containing organic resin, (b) a phosphoric acid and (c) at least one of ions and compounds of at least one metal selected from the group consisting of Cu, Co, Fe, Mn, Sn, V, Mg, Ba, Al, Ca, Sr, Nb, Y and Zn, and (d) at least one of colloids (sol) or powders of SiO.sub.2, SnO.sub.2, Fe.sub.2 O.sub.3, Fe.sub.3 O.sub.4, MgO, ZrO.sub.2, Al.sub.2 O.sub.3 and Sb.sub.2 O.sub.5 ; as well as a metal sheet or metal article having thereon (i) a coating film of the chromium-free composition and optionally (ii) a coating film of a coating composition comprising an organic resin and if desired a colloid (sol) or a powder.

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