Silberline Manufacturing Company, Inc.

H Taylor Lamborn

Craig B Keemer

William G Jenkins

Michael Curcio

Robert E Souerwine

Joseph B Scheller

Metal pigment particles are treated with a product resulting from the reaction between an organic phosphonic acid with an amine having at least one organic group containing at least six carbon atoms to inhibit their reactivity to water. The treated metal particles can be used in coating and ink compositions. Additionally, the treated metal particles can be used to formulate pastes and dispersions that are provided to a coatings manufacturer.

Phosphonic acid derivative treatment of metallic flakes

Metal particles useful for coating compositions, particularly aqueous coating compositions, are produced by treating the metal particles with a molybdate pigment. The molybdate pigment reacts with the surface of the metal particles. The molybdate pigment may be a salt such as a molybdate, phosphomolybdate or silicomolybdate salt, and the salt may include a multivalent cation such as calcium, strontium, barium, magnesium, zinc and aluminum. The metal particles show improved resistance to attack by water.

Inhibited metal pigment pastes containing molybdate pigments and

Aqueous resistant metal pigment-containing paste and method for making

Water resistant metal pigment particles

Metal pigment particles which are treated with both a heteropoly anion compound and a phosphosilicate pigment compound show increased stability against attack by water. The particles are especially useful in aqueous coating compositions.

Metal pigment particles which are treated with a phosphosilicate compound show increased stability against attack by water. The particles are especially useful in aqueous coating compositions.

Water resistant metal pigment-containing paste and method for making

Metal pigment particles which are treated with a heteropoly anion compound show increased stability against attack by water. The particles are especially useful in aqueous coating compositions.

Metal pigment particles treated with an organic phosphate, phosphite or a pentavalent vanadium compound and a nitro-containing compound show increased stability against attack by water. The particles are especially useful in aqueous coating compositions.

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Reading, PA, United States of America

H Taylor Lamborn