Multi-layer coating composition and method of preparation
AssigneeRohn and Haas Company
InventorTheodore Tysak
Life of this patent
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Abstract
A method for preparing multi-layer protective coatings having enhanced durability with easy removability under conventional stripping conditions is disclosed. The invention is based on applying to a substrate, a first-coating composition that is removable, followed by application of a second-coating composition that is highly durable but not readily removable. Preferred second-coating compositions are based on polymers that provide highly crosslinked ‘non-removable’ (under conventional stripping conditions) coatings if used alone. The resultant multi-layer coating compositions provide enhanced detergent resistance while retaining easy overall removability properties.
Claims16
A method for preparing a multi-layer coating composition comprising:
- (a) applying a first-coating composition to a substrate wherein the first-coating composition comprises a polymer product having a gel fraction of 0.3 to 0.95 in a solvent selected from one or more of acetone and tetrahydrofuran and wherein the first-coating composition is applied in one or more separate applications, allowing the first-coating composition to dry after each application;
- and
- (b) applying a second-coating composition onto the dried first-coating composition of step (a) wherein the second-coating composition comprises a polymer product having a gel fraction of greater than 0.95 and up to 0.99 in a solvent selected from one or more of acetone and tetrahydrofuran and wherein the second-coating composition is applied in one or more separate applications, allowing the second-coating composition to dry after each application.
A coated surface composition comprising a substrate bearing a multi-layer coating comprising:
- (a) a first-coating composition disposed upon the substrate, wherein the first coating composition comprises a polymer product having a gel fraction in acetone of 0.3 to 0.95;
- and
- (b) a second-coating composition disposed upon the first coating composition, wherein the second coating composition comprises a polymer product having a gel fraction in acetone of greater than 0.95 and up to 0.99;
- wherein the substrate is selected from one or more of flooring, wall, ceiling and tile materials.
Dependencies are inferred from the claim text.