Protective water reversible clear coating for substrates
AssigneeConservation Technologies, Inc.
InventorsRichard Wolbers, Anthony Lagalante
Life of this patent
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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.
Claims17
A composition comprising:
- an aqueous medium, a volatile base, an acrylic film forming polymer, a polyoxazoline, and a poly acidic polymer, said poly acidic polymer comprising between 0.1-10% of the total weight of the composition, said acrylic film forming polymer comprising between 30-60% of the total weight of the composition and said polyoxazoline comprising between 20-50% of the total weight of the composition, and wherein said composition is capable of being applied to a substrate using aqueous means and removed from said same substrate using an aqueous buffer at a pH between 6 and 10.
A method of coating a substrate with a removable composition comprising:
- a. forming a composition comprising:
- water, a volatile base, an acrylic film forming polymer, polyoxazoline, and a poly acidic polymer, wherein the percentage composition by weight is between 30-60% of the acrylic film forming polymer, between 20-50% of the polyoxazoline, and between 0.1-10% of the poly acidic polymer,
- b. coating said substrate with said composition, and
- c. allowing said composition to dry, wherein said dried composition is capable of being re-solubilized using an aqueous buffer having a pH of between 6 and 10.
A method of coating a substrate comprising:
- a. applying a first layer of a composition comprising:
- water, a volatile base, an acrylic film forming polymer, a polyoxazoline, and a poly acidic material, wherein the percentage composition by weight of the first layer of a composition is between 30-60% of the acrylic film forming polymer, between 20-50% of the polyoxazoline, and between 0.1-10% of the poly acidic polymer said first layer capable of being re-solubilized using an aqueous buffer having a pH of between 7 and 10;
- b. applying a second layer of a second composition having a distinct re-solubilizing property from said first layer of a composition, comprising:
- water, a volatile base, an acrylic film forming polymer, a polyoxazoline, and a poly acidic material, said second layer capable of being re-solubilized using an aqueous buffer having a pH of between 6 and 10;
- and
- c. wherein said first and second compositions are capable of being re-solubilized using an aqueous buffer with a different pH, having a difference of at least 0.5 pH.
Dependencies are inferred from the claim text.