COATING COMPOSITION FOR METAL SUBSTRATES

Brazil Patent

PATENT NO 0212424
APP PUB NO BR-0212424-A
SERIAL NO

0212424

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The present invention relates to a composition for coating a metal substrate which is intended to be fabricated and overcoated, wherein the binder comprises an acqueous silica sol having a SiO2/M2O mole ratio, with M representing the total of alkali metal and ammonium ions, of at least 6:1, and wherein the ratio of the pigment volume concentration to the critical pigment volume concentration is smaller than 1.

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