Process for stabilising metal pigments towards corrosive media

Details Process for stabilising metal pigments towards corrosive media Process for stabilising metal pigments towards corrosive media

C - Chemistry, Metallurgy

09

C

117/48, 400/5044

C09C 3/10 (2006.01) B01J 13/02 (2006.01) C09C 1/62 (2006.01) C09C 1/64 (2006.01)

Patent

CA 1179557

ABSTRACT OF THE DISCLOSURE Metal pigments stabilized against chemical influences particularly for use in aqueous paint systems by blending with the reaction product of an amine-aldehyde condensation product etherified with low molecular weight alcohols and an acidic phosphoric acid derivative of the general formula - P (O) Rx (OH)y or a derivative of a polyphosphoric acid of the general formula [P (O) Rx (OH)y-z O0.5 z] n, wherein R is a radical linked to the phosphoric or polyphos- phoric acid radical through a C-P- or C-O-P-linkage and which contains a group reactive with said amine-aldehyde condensation product; x being a number less than 3 and x + y equalling 3, z being the number of P-O-links stemming from a P-atom and being less than y, and n being the degree of polymerization, the weight ratio between said reaction product and metal pig- ment expressed by the value Image being at least 1.

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