Aluminum flake pigment treated with metal salts and coatings...

C - Chemistry – Metallurgy – 09 – C

Patent

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Details

C09C 1/64 (2006.01) C09C 3/06 (2006.01) C09D 5/02 (2006.01) C09D 5/38 (2006.01) C09D 17/00 (2006.01)

Patent

CA 2110077

37 The invention is an aluminum flake pigment particle, surface treated with a transition metal or rare earth metal salt. The treated pigment particle has been found to be highly useful in water-borne coating compositions having a basic pH. The treated pigment particles experience significantly less hydrogen gassing in a high pH environment, and in water-borne coating compositions than untreated aluminum flake pigment particles. The treated pigment particles are also useful when combined with a pigment dispersant composition to further inhibit corrosion and gassing when the pigments are used in a coating composition.

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