Use of perturbants to facilitate incorporation and recovery of taggants from polymerized coatings
First Claim
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1. A method for authenticating an object, comprising:
- providing an object comprising a coating comprising a taggant, a perturbant and a polymer;
wherein the taggant comprises a nucleic acid;
wherein the perturbant comprises one or both of a hydroxypropyl starch and a pyrrolidone compound;
wherein the polymer comprises one or more of polyurethane, a shellac, a lacquer, an acrylic compound and an epoxy-based compound;
recovering the nucleic acid of the taggant from the object, wherein the perturbant increases recoverability of the nucleic acid taggant; and
verifying the authenticity of the object by identifying the nucleic acid of the taggant.
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Abstract
The invention provides methods for increasing the recoverability of taggants from an object. The methods include the steps of incorporating a taggant into a solution; mixing the solution including the taggant with a perturbant to form a first perturbant taggant solution; mixing the first perturbant taggant solution with a polymer to form a second perturbant taggant polymer solution; and applying the second perturbant taggant polymer solution to at least a portion of the object to form a taggant-coated object. Methods for authentication of a taggant marked object are also provided.
104 Citations
16 Claims
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1. A method for authenticating an object, comprising:
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providing an object comprising a coating comprising a taggant, a perturbant and a polymer; wherein the taggant comprises a nucleic acid; wherein the perturbant comprises one or both of a hydroxypropyl starch and a pyrrolidone compound; wherein the polymer comprises one or more of polyurethane, a shellac, a lacquer, an acrylic compound and an epoxy-based compound; recovering the nucleic acid of the taggant from the object, wherein the perturbant increases recoverability of the nucleic acid taggant; and verifying the authenticity of the object by identifying the nucleic acid of the taggant. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for authenticating an object, comprising:
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providing an object comprising one or more taggants comprising a nucleic acid, a perturbant and a polymer; wherein the perturbant comprises one or one or both of a hydroxypropyl starch and a pyrrolidone compound; and wherein the polymer is selected from the group consisting of at least one of polyurethane (PU), polystyrene (PS), polypropylene (PP), polyvinyl chloride (PVC), polyvinylacetate (PVA), polyester (PES), polyethylene terephthalate (PET), polyethylene (PE) and polyvinylidene chloride (PVDC); recovering the one or more taggants from the object, wherein the perturbant increases recoverability of the nucleic acid taggant; and verifying the authenticity of the object by identifying one or more of the taggants. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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Specification