Thixotropic coating compositions and methods
AssigneeSermatech International, Inc.
InventorsMark F. Mosser, William J. Fabiny
Life of this patent
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Abstract
A coating composition which is thixotropic, that is, which is a gel when not subject to movement and a liquid when subject to movement. It comprises a non-ionic surfactant, an acid-stable, non-colloidal amorphous silica and a phosphate type acid binder aqueous solution.
Claims37
An acid and stable thixotropic coating composition especially suitable for dipspin application which comprises (a) an acid binder aqueous solution which comprises phosphate ions and ions of the group of chromate ions or molybdate ions, and (b) an acid-stable, non-colloidal amorphous silica and (c) a nonionic surfactant, which composition is in a gel state when not subject to movement and in a liquid state when subject to movement.
The stable thixotropoic coating composition of clam 1 wherein the amount of nonionic surfactant is in the range of about 0.01 to about 0.5 percent by weight of total solids.
Dependencies are inferred from the claim text.