# US 2016/0032143 A1 · Protective water reversible clear coating for substrates > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2016/0032143 A1 - Document ID: US20160032143A1 - Status: Published application - Kind: A1 - Application number: 14/775,023 - Filed: 2014-03-14 - Published: 2016-02-04 - Earliest claimed: 2013-03-15 - Assignees: Conservation Technologies, Inc. - Inventors: Richard Wolbers; Anthony Lagalante - Web page: https://patentgrep.com/patent/US20160032143A1 ## CPC - C09D 177/00: Coating compositions based on polyamides obtained by reactions forming a carboxylic amide link in the main chain (based on polyhydrazides C09D179/06; based on polyamide-imides C09D179/08); Coating compositions based on derivatives of such polymers - B05D 7/52: {Two layers} - C09D 5/02: Emulsion paints {including aerosols} - C09D 133/02: Homopolymers or copolymers of acids; Metal or ammonium salts thereof - C09D 133/08: Homopolymers or copolymers of acrylic acid esters - C09D 133/12: Homopolymers or copolymers of methyl methacrylate - C09D: COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR (cosmetics A61K; processes for applying liquids or other fluent materials to surfaces, in general, B05D; staining wood B27K5/02; glazes or vitreous enamels C03C; natural resins, French polish, drying-oils, driers, turpentine, per se, C09F; polishing compositions other than French polish, ski waxes C09G; adhesives or use of materials as adhesives C09J; materials for sealing or packing joints or covers C09K3/10; materials for stopping leaks C09K3/12; processes for the electrolytic or electrophoretic production of coatings C25D) - B05D: PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (conveying articles or workpieces through baths of liquid B65G, e.g. B65G49/02) ## Abstract A protective water reversible clear coating composition for the protection of substrates comprised of water, a volatile base, a film-forming acrylic polymer in a water dispersion form, a second film-forming polymer, specifically poly (2-ethyl-2-oxazoline) that is miscible with the first dispersed acrylic polymer, a poly acidic material (pH specific in terms of its solubility properties), and an alkaline swellable thickener that also can be water soluble as a function of pH and wherein said coating is both water applied and water reversible or re-soluble under specific pH conditions. ## Claims ### Claim 1 A composition comprising: an aqueous medium, a volatile base, an acrylic polymer, a film-forming polymer, a poly acidic material, and an alkaline swellable thickener, wherein said composition is capable of being applied to a substrate using aqueous means and removed from said same substrate using aqueous means at a specific pH. ### Claim 2 (depends on 1) The composition of claim 1 further comprising one or more of the following: a UV stabilizer, a coalescence material, a de-foaming agent, an anti-microbial agent, a colorant, an agent to protect from temperature swings, and a flattening agent. ### Claim 3 (depends on 1) The composition of claim 1 wherein said acrylic polymer is selected from the group consisting of: acrylic emulsions, styrene/acrylic emulsions, polyester emulsions or combinations thereof. ### Claim 4 (depends on 1) The composition of claim 1 wherein said acrylic polymer is selected from the group consisting of: EA-MMA, BA-MMA or variations thereof. ### Claim 5 (depends on 1) The composition of claim 1 wherein said acrylic polymer is Dow Rhoplex VSR-50 “pure” acrylic resin emulsion, Rhoplex HA-12, Rhoplex 1-2074, Acronal 5728, Acronal NX4533, and Acronal S888S. ### Claim 6 (depends on 1) The composition of claim 1 wherein said film-forming polymer is poly (2-ethyl-2-oxazoline). ### Claim 7 (depends on 1) The composition of claim 1 wherein said poly acidic material is an acrylic resin comprising at least one vinyl or vinylidene moiety having a carboxylic acid group capable of salt formation. ### Claim 8 (depends on 1) The composition of claim 1 wherein said poly acidic material is selected from the group consisting of: Eudragit L 100-55, L-100, and S-100 resins or combinations thereof. ### Claim 9 (depends on 1) The composition of claim 1 wherein the said film forming acrylic polymer and said film-forming polymer are combined in a ratio of about 180:1. ### Claim 10 (depends on 1) The composition of claim 1 wherein said swellable thickener is an alkali swellable carboxylated polymer. ### Claim 11 (depends on 11) The composition of claim 11 wherein said swellable thickener is Acrysol ASE-60, Acrysol ASE-75, Rheolate 450, Rheolate 420, Elementis Rheolate 255, Rheolate 216 and Rheolate 1. ### Claim 12 A method of coating a substrate with a removable composition comprising: a. Forming a composition comprising: water, a volatile base, an acrylic polymer, poly (2-ethyl-2-oxazoline), a poly acidic material, and an alkaline swellable thickener, b. coating said substrate with said composition, and c. allowing said composition to dry. ### Claim 13 (depends on 12) The method of claim 12 wherein said dried composition is capable of being re-solubilized at a pH of greater than 6.0 in an aqueous medium. ### Claim 14 (depends on 12) The method of claim 12 further comprising one or more of the following: a UV stabilizer, a coalescence material, a de-foaming agent, an anti-microbial agent, a colorant, an agent to protect from temperature swings, and a flattening agent. ### Claim 15 A method of coating a substrate comprising: a. Applying a first layer of a composition comprising: water, a volatile base, an acrylic polymer, poly (2-ethyl-2-oxazoline), a poly acidic material, and an alkaline swellable thickener; b. applying a second layer of a second composition comprising: water, a volatile base, an acrylic polymer, poly (2-ethyl-2-oxazoline), a poly acidic material, and an alkaline swellable thickener, and c. wherein said first and second compositions are capable of being re-solubilized at a different pH. ### Claim 16 (depends on 15) The method of claim 15 wherein said first coating is capable of being re-solubilized at a pH of about 1.0 unit greater than said second adjacent coating in an aqueous medium. ### Claim 17 (depends on 15) The method of claim 15 wherein said first coating is capable of being re-solubilized at a pH of about 8.0 or more and wherein said second coating is capable of being re-solubilized at a pH of about 7.0 in an aqueous medium. ### Claim 18 (depends on 15) The method of claim 15 wherein said first acrylic polymer and said poly (2-ethyl-2-oxazoline) are combined at a ratio of about 180:1 in the first and second composition. ### Claim 19 (depends on 15) The method of claim 15 further comprising a non-pH reversible coating applied to the substrate prior to the application of the first layer. ### Claim 20 (depends on 15) The method of claim 15 comprising three or more layers capable of individually being re-solubilized provided that each adjacent layer is re-solubilized at a pH of about 1.0 unit greater than an adjacent inner layer.