METHOD OF AUTHENTICATING TAGGED POLYMERS

• US 20090266991A1
• Filed: 10/24/2008
• Published: 10/29/2009
• Est. Priority Date: 11/26/2003
• Status: Abandoned Application

• Current Assignee: SABIC Global Technologies BV (Government of Saudi Arabia)
• Original Assignee: Sabic Innovative Plastics IP BV (Government of Saudi Arabia)
• Inventors: Zoller, David Lawrence, Evans, Thomas L., Maruvada, Sriramakrishna, Schottland, Philippe, Pai-Paranjape, Vandita
• Application Number:
  US12/258,176
• Publication Number:
  US 20090266991A1
• Time in Patent Office: Days
• US Class Current: 250/362
• CPC Class Codes: G01N 21/64 Fluorescence; Phosphorescence
• CPC Class Codes: G11B 23/281 by changing the physical properties of the record carrier
• CPC Class Codes: G11B 23/283 Security features, e.g. digital codes
• CPC Class Codes: G11B 7/2433 Metals or elements of Groups 13, 14, 15 or 16 of the Periodic Table, e.g. B, Si, Ge, As, Sb, Bi, Se or Te
• CPC Class Codes: G11B 7/2472 cyanine
• CPC Class Codes: G11B 7/248 porphines; azaporphines, e.g. phthalocyanines
• CPC Class Codes: G11B 7/252 of layers other than recording layers
• CPC Class Codes: G11B 7/2534 polycarbonates [PC]
• CPC Class Codes: G11B 7/254 of protective topcoat layers
• CPC Class Codes: G11B 7/2578 consisting essentially of inorganic materials
• CPC Class Codes: G11B 7/258 of reflective layers

Abstract

In one embodiment, a tagged polymer composition, comprises: a base polymer composition comprising a forensic polymer composition and a dynamic response authentication marker. The forensic polymer composition comprises a marked polymer having a forensic authentication marker. The forensic authentication marker is present in an amount sufficient to be detected by a forensic analytical technique. The dynamic response authentication marker is present in an amount sufficient to be detected by a dynamic response analytical technique and wherein, when tested, the dynamic response authentication marker has a change in mode.

Claims

1. A tagged polymer composition, comprising:

a base polymer composition comprising a forensic polymer composition and a dynamic response authentication marker, wherein the forensic polymer composition comprises a marked polymer having a forensic authentication marker;

wherein the forensic authentication marker is present in an amount sufficient to be detected by a forensic analytical technique;

wherein the dynamic response authentication marker is present in an amount sufficient to be detected by a dynamic response analytical technique; and

wherein, when tested, the dynamic response authentication marker has a change in mode.

2. The tagged polymer composition of claim 1, wherein the forensic authentication marker and the dynamic response authentication marker are present in an amount such that properties of the tagged polymer composition including optical, physical, rheological, thermal, and processing properties vary from the base polymer composition less than or equal to 20%.

3. The tagged polymer composition of claim 1, wherein the forensic authentication marker is present in the tagged polymer in an amount of less than or equal to about 10 wt %, based on the total weight of the tagged polymer composition.

4. The tagged polymer composition of claim 3, wherein the forensic authentication marker is present in the tagged polymer in an amount of less than or equal to about 0.5% weight, based on the total weight of the tagged polymer composition.

5. The tagged polymer composition of claim 1, wherein the forensic authentication marker is a member selected from the group consisting of alkyl groups of 2 or more carbon atoms, cycloaliphatic groups of 3 or more carbon atoms, —

OCH₃ groups, —

CH₃Si groups, methyl groups attached to an aryl moiety, divalent substituted phenol groups, terminal substituted phenol groups, DMBPC structural units, and (—

CH₂—

)_n groups where n is a number of from 4 to 14.

6. The tagged polymer composition of claim 1, wherein the base polymer composition comprises polycarbonate.

7. The tagged polymer composition of claim 6, wherein the forensic authentication marker is a monomer of a copolymer miscible with the base polymer composition.

8. The tagged polymer composition of claim 7, wherein the forensic authentication marker comprises structural units of DMBPC monomer.

9. The tagged polymer composition of claim 1, wherein the dynamic response authentication marker comprises a member selected from the group consisting of a fluorophore, a semi-conducting luminescent nanoparticle, and mixtures comprising at least one of the foregoing.

10. The tagged polymer composition of claim 1, wherein the dynamic response authentication marker is present in the tagged polymer in an amount of about 10⁻

5 wt % to about 0.1 wt %, based on the total weight of the tagged polymer composition.

11. A molded article comprising the tagged polymer composition of claim 1.

12. The molded article of claim 11, wherein the molded article is a data storage media.

13. A method of authenticating that a test polymer is a tagged polymer composition, wherein the tagged polymer composition comprises a base polymer composition comprising a forensic polymer composition and a dynamic response authentication marker, wherein the forensic polymer composition comprises a marked polymer having a forensic authentication marker;

wherein the forensic authentication marker is present in an amount sufficient to be detected by a forensic analytical technique;

wherein the dynamic response authentication marker is present in an amount sufficient to be detected by a dynamic response analytical technique; and

wherein, when tested, the dynamic response authentication marker has a change in mode, the method comprising;

testing the test polymer for the forensic authentication marker using a forensic analytical technique;

testing the test polymer for the dynamic response authentication marker using a dynamic response analytical technique; and

authenticating that a test polymer is a tagged polymer composition if the forensic authentication marker and dynamic response authentication marker are detected.

14. The method of claim 13, wherein the forensic authentication marker is a member selected from the group consisting of alkyl groups of 2 or more carbon atoms, cycloaliphatic groups of 3 or more carbon atoms, —

OCH₃ groups, —

CH₃Si groups, methyl groups attached to an aryl moiety, divalent substituted phenol groups, and terminal substituted phenol groups, (—

CH₂—

)_n groups where n is a number of from 4 to 14, and DMBPC structural units; and

wherein the dynamic response authentication marker is a member selected from the group consisting of a fluorophore, a semi-conducting luminescent nanoparticle, and combinations comprising at least one of the foregoing.

15. The method of claim 13, wherein the forensic analytical technique is selected from the group consisting of resonance spectroscopy methods, SEM-EDX, XPS-ESCA, gas or liquid chromatography, and combinations comprising at least one of the foregoing forensic analytical techniques.

16. The method of claim 13, wherein the dynamic response analytical technique is selected from the group consisting of luminescence spectroscopy, fluorescence spectroscopy, vibrational spectroscopy, electronic spectroscopy, visual observation under specific lighting conditions, color spectrophotometry, and combinations comprising at least one of the foregoing dynamic response analytical techniques.

17. The method of claim 15, wherein the forensic analytical technique is selected from the group consisting of NMR and HPLC and the dynamic response analytical technique is selected from the group consisting of visual observation, luminescence spectroscopy, and fluorescence spectroscopy.

18. The method of claim 17, wherein the forensic analytical technique is NMR and the dynamic response analytical technique is fluorescence spectroscopy.

19. The method of claim 17, wherein the forensic analytical technique is HPLC and the dynamic response analytical technique is fluorescence spectroscopy.

20. The method of claim 17, wherein the forensic authentication marker is a DMBPC structural unit and the dynamic response analytical marker is a fluorophore.