Epoxy coating compositions with metal-containing stabilizers and articles made therewith
AssigneeMinnesota Mining and Manufacturing Company
InventorEric D. Morrison
Life of this patent
Estimating the term…
Abstract
A coating composition comprises an epoxy silane, an amine hardener that can react with the epoxy silane to form a cross-linked coating, and a stabilizer that includes a sufficient amount of a metal component to delay cross-linking between the epoxy silane and the amine hardener. The coating composition has a shelf life of at least 3 days.
Claims22
An article comprising a substrate having a layer of a coating composition thereon, the coating composition comprising:
- (a) an epoxy component selected from the group consisting of epoxy terminated silanes, aqueous prehydrolysis products of epoxy terminated silanes, prepolymerized epoxy terminated silanes, and epoxy terminated siloxanes;
- (b) an amine hardener that can react with the epoxy component to form a cross-linked coating;
- and
- (c) a sufficient amount of a metal component-containing stabilizer to delay cross-linking between the epoxy component and the amine hardener.
A method of preparing an article comprising a substrate having a layer of a coating composition thereon, the method comprising the steps of:
- a) applying a layer of the coating composition to the substrate;
- wherein the coating composition comprises:
- (i) an epoxy component selected from the group consisting of epoxy terminated silanes, aqueous prehydrolysis products of epoxy terminated silanes, prepolymerized epoxy terminated silanes, and epoxy terminated siloxanes;
- (ii) an amine hardener that can react with the epoxy component to form a cross-linked coating;
- and
- (iii) a sufficient amount of a metal component-containing stabilizer to delay crosslinking between the epoxy component and the amine hardener until heated;
- and
- b) heating the coated substrate for a time and at a temperature sufficient to cause the composition to form a crosslinked coating on a surface of the substrate.
An article comprising a substrate having a layer of crosslinked coating composition thereon, the coating composition comprising:
- (a) the reaction product of:
- (i) an epoxy component selected from the group consisting of epoxy terminated silanes, aqueous prehydrolysis products of epoxy terminated silanes, prepolymerized epoxy terminated silanes, and epoxy terminated siloxanes;
- and
- (ii) an amine hardener;
- and
- (b) a sufficient amount of a metal component-containing stabilizer that delayed crosslinking between the epoxy component and the amine hardener until the coating was cured.
Dependencies are inferred from the claim text.