Water based coating

Abstract

A heat curable aqueous composition comprising: (a) water; (b) at least 5 wt % sodium pyrophosphate, at least 5 wt % sodium phosphate monobasic, at least 5 wt % sodium triphosphate, at least 5 wt % monoammonium phosphate, at least 5 wt % diammonium phosphate, or at least 5 wt % of a mixture thereof, based on the total weight of the composition including the weight of the water; and (c) at least one pigment, or at least one metal-containing ingredient, or a mixture of at least one pigment and at least one metal-containing ingredient.

Dependencies are inferred from the claim text.