Composition for surface treatment
AssigneeAlcan International Limited
InventorsGeoffrey P. Marks, William F. Marwick
Life of this patent
Estimating the term…
Abstract
An aqueous composition for the treatment of surfaces such as metals particularly aluminum, comprises a tetraalkyl silicate or a monomeric or oligomeric hydrolysis product thereof, and an inorganic passenger powder below 100 nm diameter such as fumed silica, both in dispersion in a fluid aqueous medium. The composition can be applied as a conversion coating to improve the adhesion of subsequently applied paint, lacquer or adhesive. Non-aqueous intermediate products comprising the silicate component and passenger powder can be diluted with water to make the coating composition.
Claims12
A coating composition suitable for application to a surface to improve the adhesion properties of the surface, said coating composition consisting essentially of a binder which is a tetraalkyl silicate or a monomeric or oligomeric hydrolysis product thereof, an inorganic oxide below 100 nm primary particle diameter, and optionally at least one component selected from the group consisting of corrosion-inhibitors, surfactants, adhesion-promoters, markers, catalysts for chain-extension and cross-linking of the binder, and hydrogen peroxide, all in dispersion in a fluid aqueous medium consisting of water containing up to 30 % by volume of a polar organic liquid at least partially miscible with water.
A non-aqueous product consisting essentially of a binder which is a tetraalkyl silicate or a monomeric or oligomeric hydrolysis product thereof, an inorganic oxide below 100 nm primary particle diameter, and optionally at least one component selected from the group consisting of corrosion inhibitors, surfactants, adhesion-promoters, markers, catalysts for chain-extension and cross-linking of the binder, and hydrogen peroxide, said product being dispersible in a fluid aqueous medium consisting of water containing up to 30% by volume of a polar organic liquid at least partially miscible with water, to give a coating composition suitable for application to a surface to improve the adhesion properties of the surface.
Dependencies are inferred from the claim text.