Process for labeling materials based on organic thermoplastic or thermosetting polymer matrices
AssigneeInstitut National Des Sciences Appliquees De Rennes
InventorsOlivier Guillou, Carole Daiguebonne, Nicolas Kerbellec
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Abstract
Process for labelling a material based on at least one organic thermoplastic or thermosetting polymer matrix comprising a step that consists in incorporating therein, by dispersion during its manufacture or its formation, at least one compound based on at least one photoluminescent rare earth in a concentration that renders this compound detectable under UV irradiation, said compound being a coordination polymer that is in the form of a crystallite obtained by reaction of at least one photoluminescent rare-earth ion with at least one unsaturated organic ligand.
Claims13
A method for labeling a material, wherein the material includes an organic thermoplastic or thermosetting polymer matrix, the method comprising:
- reacting two to ten photoluminescent rare earth ions and at least two rare earth ions that are non-photoluminescent under ultraviolet light, with one unsaturated organic ligand to form one coordination polymer in the form of a crystallite, wherein the non-photoluminescent rare earth ions are selected from the group consisting of scandium, yttrium, and lanthanum;
- and
- incorporating, by dispersion during the production or shaping thereof, said crystallite into said thermoplastic or thermosetting polymer matrix of the material, wherein said crystallite is included in said material in an amount of 1 ppm to 1% by weight making said crystallite detectable under UV irradiation, said dispersion comprising no chemical reaction nor ionic nor covalent interaction of the crystallite with the matrix, and said crystallite having a specific spectrophotometric signature.
Dependencies are inferred from the claim text.