Fast-setting latex coatings and formulations
AssigneeThe Dow Chemical Company
InventorsJohn K. Harris, Donald L. Schmidt, Gene D. Rose
Life of this patent
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Abstract
A fast-setting coating material can be prepared by contacting a stable aqueous dispersion of a polymer that contains strong cationic groups and weak acid groups onto a substrate that is basic or rendered to be basic. Alternatively, the coating material can be prepared by contacting in either order or concurrently the surface of a substrate with two separate polymers, one of which contains strong cationic groups, and the other of which contains weak acid groups. In this case, the substrate need not be basic for the coating to quickly set.
Claims6
A method of preparing a fast-setting coating on a substrate having a surface comprising the steps of contacting the surface of the substrate with a) a first stable aqueous dispersion containing a first polymer having pendant strong cationic groups, and b) a second stable aqueous dispersion of a second polymer having pendant weak acid groups;
- wherein the contact of the polymers with the surface is made in any order or concurrently, wherein the first and second polymer each have structural units formed from the polymerization of a non-interfering polymerizable monomer and wherein the pH of the first or the second stable aqueous dispersion is at least about 5.
Dependencies are inferred from the claim text.