(IN201717039826) Hermoluminescent and superparamagnetic composite particle and marking compris - ing same 机翻标题: 暂无翻译,请尝试点击翻译按钮。

源语言标题
Hermoluminescent and superparamagnetic composite particle and marking compris - ing same
公开号/公开日
IN201717039826 A 2017-12-29 [IN201717039826] / 2017-12-29
申请号/申请日
2017IN-17039826 / 2017-11-08
发明人
Mia MILOS SCHOUWINK;
申请人
SICPA;
主分类号
IPC分类号
C01G-019/02C01G-049/08C09K-009/00
摘要
(IN201717039826) Disclosed is a composite particle for use in a marking that is suitable for identification/authentication purposes.  The particle comprises at least one superparamagnetic portion and at least one thermoluminescent portion coated with an thermoisolating portion.  Optionally also a thermoconductive portion between the superparamagnetic and thermoluminscent portions.
机翻摘要
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地址
代理人
代理机构
;
优先权号
2015WO-EP63759 2015-06-18
主权利要求
(IN201717039826)  1. A composite particle for use in a marking, comprising at least one superparamagnetic portion and at least one thermoluminescent portion, wherein the composite particle comprises (b) A thermoluminescent central portion (core) that is at least partially surrounded by (a) a superparamagnetic material. 2. The composite particle according to claim 1, wherein the thermoluminescent portion comprises a doped ceramic material. 3. The composite particle according to any one of claims 1 and 2, wherein the composite particle comprises (b) the thermoluminescent portion comprises a ceramic material doped with one or more ions selected from metal ions, transition metal ions and rare earth metal ions at least partially surrounded by (a) a superparamagnetic material 4. The composite particle according to any one of claims 1 to 3, wherein the thermoluminescent portion is present in the form of an aggregate of thermoluminescent particles. 5. The composite particle according to any one of claims 1, 2 and 4, wherein the superparamagnetic material is present as adsorbed particles on the surface of the central thermoluminescent portion. 6. The composite particle according to any one of claims 1 to 5, wherein the superparamagnetic portion comprises Fe30 4. 7. The composite particle according to any one of claims 1 to 6, wherein the thermoluminescent portion is made of ceramic material comprising at least one element selected from O, N, S, P. 8. The composite particle according to claim 7, wherein the ceramic material comprises at least O and/or S. 9. The composite particle according to any one of claims 1 to 8, wherein the ceramic material comprises Ga20 3. 10. The composite particle according to any one of claims 1 to 8, wherein the thermoluminescent portion made of ceramic material comprises CaTi0 3. 11. The composite particle according to any one of claims 1 to 8, wherein the thermoluminescent portion made of ceramic material comprises SrAl204. 12. The composite particle according to any one of claims 2 to 11, wherein the doped ceramic material comprises one or more doping ions at least one doping ion being selected from Eu2+, Eu +, Dy +, Pr +, Sm +, Tb +, Ce +, Ce2+, Er +, Tm +. 13. The composite particle according to any one of claims 2 to 12, wherein the doped ceramic material comprising one or more doping ions, comprises at least two rare earth metal ions. 14. The composite particle according to any one of claims 2 to 11, the doped ceramic material comprising one or more doping ions, comprises at least one ion selected from Cr +, Mn +, Ti +, In +. 15. The composite particle according to any one of claims 1 to 14 wherein the whole composite particle is coated with a silica layer. 16. The composite particle according to claims 15 wherein the silica layer coating has a thickness of not lower than 5 nm, e.g., not lower than 10 nm, or not lower than 20 nm, and will often (although not necessarily) be not higher than 600 nm, e.g., not higher than 500 nm, not higher than 200 nm, or not higher than 100 nm. 17. The composite particle according to any one of the claims 1 to 16, wherein the particle further comprises a thermoconductive material that separates the superparamagnetic portion from the thermoluminescent portion. 18. The composite particle according to claim 17, wherein the thermoconductive material comprises one or more of Si0 2, Ti0 2, polymethylmethacrylate. 19. The composite particle according to any one of claims 17 and 18, wherein the thermoconductive material comprises Si0 2. 20. The composite particle according to any one of claims 1 to 19, wherein the thermoconductive material is arranged as a layer or connector between the superparamagnetic material and the thermoluminescent material of the composite particle and/or wherein the whole composite particle is coated with a thermoconductive, preferably thermoisolating material. 21. The composite particle according to claim 20, wherein the thermoconductive layer or connector has a thickness of from 10 nm to 600 nm, preferably from 10 nm to 300 nm, more preferably from 10 to 200 nm, even more preferably from 10 to 100 nm, even more preferably from 5 to 50 nm. 22. A plurality of composite particles according to any one of claims 1 to 21, wherein the plurality of composite particles comprises at least two composite particles which differ with respect to at least one of the superparamagnetic portion or core, the thermoluminescent portion and, optionally, the thermoconductive portion. 23. A plurality of composite particles according to any one of claims 1 to 22, wherein the plurality of composite particles comprises at least two composite particles which differ with respect to the thickness of at least one of the thermoluminescent portion and the thermoconductive portion. 24. A plurality of composite particles according to any one of claims 1 to 23, wherein the plurality of composite particles exhibits at least two different particle size distributions. 25. A marking which comprises a plurality of composite particles according to any one of claims 1 to 24. 26. The marking according to claim 25, wherein at least a part of the marking is in the form of at least one of an image, a picture, a logo, indicia, a cloud of dots, randomly distributed dots, One or more glyphs and a pattern representing a code selected from one or more of a 1. Dimensional barcode, a stacked 1-dimensional barcode, a 2-dimensional barcode, a 3- Dimensional barcode, a data matrix. 27. An article having thereon the marking according to any one of claims 25 and 26. 28. The article of claim 27, wherein the article is or comprises at least one of a label, Packaging, a cartridge, a container or a capsule that contains foodstuffs, nutraceuticals, Pharmaceuticals or a beverage, a banknote, a credit card, a stamp, a tax label, a security document, a passport, an identity card, a driver's license, an access card, a transportation ticket, An event ticket, a voucher, an ink-transfer film, a reflective film, an aluminum foil, and a commercial good. 29. An ink for making a marking, wherein the ink comprises a plurality of composite particles according to any one of claims 1 to 24 and a carrier for the composite particles. 30. A method of providing an article with a marking, wherein the method comprises using the ink according to claim 29 for providing the marking. 31. A method of at least one of identifying and authenticating an article provided with a marking according to any one of claims 25 and 26, wherein the method comprises the following steps: (i) irradiating the marking with radiation to cause the composite particles to emit radiation;   (ii) subjecting the irradiated marking of step (i) to an oscillating magnetic field of predetermined strength and frequency for a predetermined period of time to cause the superparamagnetic material to heat up;  and (iii) detecting the intensity of the thermoluminescence emitted by the marking at a predetermined wavelengths rangeduring the period of time applied in step (ii) to obtain the variation of the intensity of the thermoluminescence as a function of timeoptionally after step (iii) pursuing the detection of the luminescence intensity after the magnetic field is switched off. 32. The method according to claim 30, wherein the method further comprises comparing the variation of the intensity of thermoluminescence obtained in (iii) with the variation of the intensity of the thermoluminescence of a reference sample that had previously been determined under conditions identical to those used in steps (i) and (ii). 33. The method according to any one of claims 30 to 32, wherein the radiation used in step (i) is in the UV or visible range. 34. The method according to any one of claims 30 to 33, wherein the method further comprises determining the intensity of the radiation re-emitted in step (i). 35. The method according claim 34, wherein the method further comprises comparing the intensity of the radiation re-emitted in step (i) to the intensity of the radiation re-emitted by the reference sample that had previously been determined under identical conditions. 36. An apparatus for carrying out the method according to any one of claims 30 to 35, Wherein the apparatus comprises (1) a radiation source for use in step (i), (2) a device capable of generating an oscillating magnetic field for use in step (ii) and (3) a device capable of detecting the intensity of the thermoluminescence for use in step (iii). 37. The apparatus according to claim 36, wherein (1) and (3) are combined in a single unit. 38. The apparatus according to claim 37, wherein the apparatus further comprises (4) an optical fiber which is connected to the single unit and is capable of providing the marking with radiation emitted by (1) and of providing (3) with thermoluminescence emitted by the marking. 39. A process for marking objects, substrates and/or supports by inkjet printing via the continuous deflected jet technique, by spraying an ink composition according to claim 20 onto these objects
法律状态
(IN201717039826) LEGAL DETAILS FOR IN201717039826  Actual or expected expiration date=2037-11-08    Legal state=ALIVE    Status=PENDING     Event publication date=2017-11-08  Event code=IN/APP  Event indicator=Pos  Event type=Examination events  Application details  Application country=IN IN201717039826  Application date=2017-11-08  Standardized application number=2017IN-17039826     Event publication date=2017-12-29  Event code=IN/A  Event indicator=Pos  Event type=Examination events  Application laid open  Publication country=IN  Publication number=IN201717039826  Publication stage Code=A  Publication date=2017-12-29  Standardized publication number=IN201717039826
专利类型码
A
国别省市代码
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