Patent ID: 6335395
Filing Date: 2002-01-01
Classification: B41M,C08L,C09D

Abstract:
A process for making a stable coating comprising an inorganic, anionic pigment, an organic, anionic binder and an organic, cationic mordant comprising the following steps in order:a) mixing said inorganic, anionic pigment with said organic, cationic mordant; b) lowering the pH of the mixture to below about 4; and c) adding said organic, anionic binder to said mixture, thus providing a coating composition which has a stable viscosity over a period of time; said inorganic, anionic pigment being present in the composition from about 10 to about 50 weight % of the coating; said organic, anionic binder being present in the composition from about 1 to about 10 weight % of the coating; and said organic, cationic mordant being present in the composition from about 2 to about 20 weight % of the coating.