Composition, method of authenticating, methods of making authenticatable compositions, authenticatable articles made there from
View Patent ↗A composition comprising compound of formula I, a process for preparing the composition comprising compound of formula I, methods of authentication for an article comprising compound of formula I or compound of formula II, authentication technology for polymer based articles comprising compound of formula I or formula II, methods of facilitating such authentication and method of making articles capable of authentication.
1. An authenticable composition comprising:
a polymer selected from the group consisting of polycarbonate, polyester, polycarbonate ester and combinations of two or more of the foregoing, and
a compound of formula II:
wherein R 1 is oxygen;
R 2 is an aromatic radical having 3 to 30 carbon atoms; and
R 4 and R 5 together represent an aromatic radical having 3 to 12 carbons or
R 1 is oxygen;
R 2 is an aromatic radical having 7 to 30 carbon atoms; and
R 4 and R 5 are hydrogen or together represent an aromatic radical having 3 to 12 carbons.
2. The composition of claim 1 , wherein said compounds of formula II are selected from the group consisting of 3-hydroxy-2-(4-(3-hydroxy-4-oxo-4H-chromen-2yl)phenyl)-4H-chromen-4-one, 7-hydroxy-6-phenyl-1,5-dioxa-cyclopenta[b]naphthalen-8-one, 7-hydroxy-6-[4-(6-hydroxy-5-oxo-5H-furo[3,2-g]chromen-7-yl)-phenyl]-1,5-dioxacyclopenta[b]naphthalen-8-one, 3,7-dihydroxy-2,8-diphenyl-pyrano[3,2-g]chromene-4,6-dione, 3-hydroxy-2-[4′-(3″-hydroxy-2″-thiophen-2-yl-chromen-4″one)-phenyl]-2-chromen-4-one, 3-hydroxy-2-biphenyl-4H-chromen-4-one, and 2-(benzofuran-2-yl)-3-hydroxy-4H-chromen-4-one.
3. The composition of claim 1 , wherein the compound of formula II is present in an amount less than or equal to 10 weight percent based on the total weight of the authenticatable composition.
4. The composition of claim 1 , wherein the composition further comprises a polyvinyl chloride, a polyolefin, a polyamide, a polysulfone, a polyimide, a polyether imide, a polyether sulfone, a polyphenylene sulfide, a polyether ketone, a polyether ether ketone, an ABS resin, a polystyrene, a polybutadiene, a polyacrylate, a polyacrylonitrile, a polyacetal, a polyphenylene ether, an ethylene-vinyl acetate copolymer, a polyvinyl acetate, a liquid crystal polymer, an ethylene-tetrafluoroethylene copolymer, a polyvinyl fluoride, a polyvinylidene fluoride, a polyvinylidene chloride, a thermosetting resin, and combinations of two or more of the foregoing polymers.
5. The composition of claim 1 , wherein the polymer comprises a polycarbonate.
6. An authentication method comprising:
subjecting at least a portion of an article to an excitation stimulus; and
measuring a response from the article wherein the article comprises a polymer selected from the group consisting of polycarbonate, polyester, polycarbonate ester and combinations of two or more of the foregoing and a compound of formula II
wherein R 1 is oxygen;
R 2 is an aromatic radical having 3 to 30 carbon atoms; and
R 4 and R 5 together represent an aromatic radical having 3 to 12 carbons or
R 1 is oxygen;
R 2 is an aromatic radical having 7 to 30 carbon atoms; and
R 4 and R 5 are hydrogen or together represent an aromatic radical having 3 to 12 carbons.
7. The method of claim 6 , wherein the excitation stimulus has a wavelength of about 250 nanometers to about 450 nanometers.
8. The method of claim 6 , wherein the excitation stimulus is selected from the group consisting of an ultraviolet-visible lamp; a light emitting diode; a laser diode; a combination of at least two light emitting diodes; a combination of an ultraviolet radiation source and a white light emitting diode; and a red, blue, green and non-color filtered photodiode.
9. The method of claim 8 , wherein the excitation stimulus is an ultraviolet-visible lamp.
10. The method of claim 9 , wherein the ultraviolet-visible lamp has a wavelength of about 340 nanometers to about 390 nanometers.
11. The method of claim 8 , wherein the step of measuring a response from the article comprises determining a signature signal of the portion of the article subjected to the excitation stimulus by measuring with a detector.
12. The method of claim 11 , wherein the detector is an unaided human eye.
13. The method of claim 11 , wherein the signature signal has a wavelength of greater than 470 nanometers.
14. The method of claim 6 , further comprising the step of determining if the response is indicative that the article comprises a compound of formula II.
15. The method of claim 6 , wherein said step of measuring the response of the article comprises measuring fluorescence.
16. The method of claim 15 , wherein the fluorescence is measured in the reflectance mode.
17. An authenticable composition comprising:
a polycarbonate; and
a compound selected from the group consisting of 3-hydroxy-2-(4-(3-hydroxy-4-oxo-4H-chromen-2yl)phenyl)-4H-chromen-4-one, 7-hydroxy-6-phenyl-1,5-dioxa-cyclopenta[b]naphthalen-8-one, 7-hydroxy-6-[4-(6-hydroxy-5-oxo-5H-furo[3,2-g]chromen-7-yl)-phenyl]-1,5-dioxacyclopenta[b]naphthalen-8-one, 3,7-dihydroxy-2,8-diphenyl-pyrano[3,2-g]chromene-4,6-dione, 3-hydroxy-2-[4′-(3″-hydroxy-2″-thiophen-2-yl-chromen-4″one)-phenyl]-2-chromen-4-one, 3-hydroxy-2-biphenyl-4H-chromen-4-one, and 2-(benzofuran-2-yl)-3-hydroxy-4H-chromen-4-one.