WO2001042386A2 - Long persistent phosphor incorporated within a settable material - Google Patents
Long persistent phosphor incorporated within a settable material Download PDFInfo
- Publication number
- WO2001042386A2 WO2001042386A2 PCT/US2000/042694 US0042694W WO0142386A2 WO 2001042386 A2 WO2001042386 A2 WO 2001042386A2 US 0042694 W US0042694 W US 0042694W WO 0142386 A2 WO0142386 A2 WO 0142386A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- phosphor
- particulate
- formulation
- settable material
- settable
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7728—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing europium
- C09K11/7729—Chalcogenides
- C09K11/7731—Chalcogenides with alkaline earth metals
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
- C09K11/025—Use of particular materials as binders, particle coatings or suspension media therefor non-luminescent particle coatings or suspension media
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
- C09K11/7784—Chalcogenides
- C09K11/7786—Chalcogenides with alkaline earth metals
Definitions
- the present invention relates generally to phosphorescent based materials and, more particularly, to a process and product by process for incorporating a long persistent phosphor within a settable material
- a common ob j ective of phosphor materials is to provide an application for a luminescent light source which takes advantage of intermittent light irradiation and/or the absence of irradiating light on a continuous basis
- a process for incorporating a long persistent phosphor within a settable material includes firing a doped phosphor to obtain a phosphor having a persistence that ranges from minutes to hours The fired phosphor is then ground into a phosphor particulate having a mean domain size The phosphor particulate is thereafter encapsulated within a water impervious coating material. The coated phosphor particulate is then mixed in a specified volume ratio within the settable material while the settable material is in a pre-set state.
- a phosphorescent settable formulation includes 0.1 to 30 volume percent of a long persistent doped sulfide phosphor particulate having a mean particle domain size of between 1 and 60 microns. The particulate has a water impervious silicon oxide or fluoride coating thereover A settable material carrier is provided for the particulate.
- a method of forming a phosphorescent solid is also provided based upon setting of an inventive formulation.
- Fig. 1 is a schematic of the production of a settable host material incorporating the long persistent phosphor according to the present invention.
- the present invention is a process, as well as a product produced by a process, for incorporating a long persistent phosphor within a settable host material.
- settable materials are capable of being utilized as carriers for the phosphorescent material and such settable materials are defined as constituted by a flowable liquid or semi-cured or semi- soft solid of some established viscosity.
- settable materials include gels, acrylic resins, epoxy resins, urethanes, polyalkylene resins polymeric monomers and oligomers, crosslinkable polymers, rubbers, and silicone resins.
- settable materials may include NOC polymer solutions, concrete, inks, paint formulations such as enamels, oil based, water based, latexes; water glass, caulk, putty, glues and adhesives, varnishes, plaster, nail polish, and lacquers. It is appreciated that the settable carrier materials of the present invention are amenable to the addition of optional additives illustratively including catalysts, fillers, plasticizers, solvent, thickeners, and pigments.
- the long persistent phosphorescent material is constituted by any of a number of various chemical compositions as are known in the art. As used herein "long persistence" is defined to mean a phosphorescence lifetime greater than 1 minute.
- the phosphor is typically provided as a powderized or granulate material and, in one instance, may include a lime green phosphor produced under the commercial name ⁇ emoto Luminova and consisting of a strontium aluminate material. Additional Luminova colors include blue and which is constituted by a recipe of a Calcium Strontium Aluminate, and which is doped with Europium.
- Other phosphors may specifically include a strontium sulfide material which is fired in an inert crucible at a selected elevated temperature and for a determined time period.
- a dopant is added to the phosphor. While dopant precursors are typically slurried with phosphor precursors prior to firing, it is appreciated that dopants are also intercalated into a phosphor through exposing a fired phosphor to a dopant. Post firing dopant addition illustratively occurs through solution surface coating or ion implantation. Experimentation of different dopants has determined that a Europium dopant will achieve a persistent phosphor having an orange/red color.
- Dopants are typically present from 0.1 to 5 atomic percent. Often it is desirous to include a second dopant to enhance persistence lifetimes or modify phosphor color. As is also well known in the art, additional types of dopants may include alumina, lanthanide oxides, fluorides and chlorides and are capable of yielding persistent phosphors having pale yellow and purple shades. Further, the use of varying percentages of Calcium with Strontium Sulfide will achieve additional color shades leading to a purer red color.
- the persistent phosphor composition is dried and is retrieved in a rock-like form.
- a subsequent crushing and grinding operation reduces the particle domain size to a preferred range of 9 to 60 microns. More preferably, the particle mean domain size is from 9 to 45 microns.
- Certain paint or solvent based applications require particular sizes to be reduced to, in some instances, down to 1 micron in size.
- a first type of encapsulation is provided by a silicon oxide applied during a firing temperature of 800°C.
- a fluoride material may be applied contemporaneously with or separately from the silicon oxide.
- a firing temperature of approximately 700°C is best suited for application of fluoride.
- Other encapsulation techniques may employ organic chlorosilanes in hexane or heptane solvents.
- the process steps in which the encapsulation of the material is accomplished typically includes mixing the coating powder with the substrate powder in an appropriate ratio, firing the mixed powder at the prescribed temperature for a defined time, washing the fired powder to remove the uncoated portion of the core powder, and drying the washed powder.
- the encapsulated phosphor particulate is illustrated at 10.
- the encapsulated long persistent phosphor is mixed during the manufacture stage of the settable host material 20 at a desired ratio by weight.
- the phosphorescent particulate is incorporated into the host material during its fluidic or semi-fluidic states. Encapsulation of the phosphor particulates permits them to maintain their long persistent and rechargeable characteristics during the setting stage of the host material, as well as during subsequent use and exposure to the environment.
- the settable material 20 upon application of the encapsulated particulate 10 results in a solution or suspension 30 suitable for application to a variety of substrates. It is appreciated that a settable material suspension or solution 30 according to the present invention is operative with other settable materials, suspensions or solutions containing encapsulated particulate applied in a step-wise fashion.
- a base coating applied to a substrate is devoid or deficient in encapsulated phosphor relative to a subsequently applied top coat, thereby enhancing the phosphorescence per unit area of substrate for a given quantity of encapsulated phosphor.
- the encapsulated phosphorescent powder is incorporated within a host material such as a nail polish formulation.
- a host material such as a nail polish formulation.
- Tests on selected phosphors have yielded several uninterrupted hours of long persistent glow.
- a further application of a long persistent phosphor involves mixing within a wax candle so as to provide a soft long persistent glow. Recharging of the phosphor is continuously maintained by the effect of the lit flaming end.
- Phosphors are typically present from 0.1 to 20% by volume in a candle wax according to the present invention.
- a yet further application involves an encapsulated long persistent phosphor incorporated into a ceramic/silicate material such as a brick paver or specialty cement.
- the phosphor is added into the top one inch of the cementitious mixture during its semi-solid or slurry stage at typically between 0.1 and 20 volume percent. This permits the phosphor to intermix freely with the top surface layers of the paver blocks and, as previously discussed, thereby diminishing the need of incorporating a greater volume by weight of phosphor throughout the entire thicknesses of the pavers, including portions or surfaces which are never exposed in use.
- a settable paint material can be employed to sufficiently coat the surface of the paver bricks.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Luminescent Compositions (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU47148/01A AU4714801A (en) | 1999-12-07 | 2000-12-07 | Long persistent phosphor incorporated within a settable material |
CA002394988A CA2394988A1 (en) | 1999-12-07 | 2000-12-07 | Long persistent phosphor incorporated within a settable material |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US16942599P | 1999-12-07 | 1999-12-07 | |
US60/169,425 | 1999-12-07 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2001042386A2 true WO2001042386A2 (en) | 2001-06-14 |
WO2001042386A3 WO2001042386A3 (en) | 2002-01-03 |
Family
ID=22615635
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2000/042694 WO2001042386A2 (en) | 1999-12-07 | 2000-12-07 | Long persistent phosphor incorporated within a settable material |
Country Status (4)
Country | Link |
---|---|
CN (1) | CN1414995A (en) |
AU (1) | AU4714801A (en) |
CA (1) | CA2394988A1 (en) |
WO (1) | WO2001042386A2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7993722B2 (en) | 2007-03-08 | 2011-08-09 | Glow-Mark Technologies, Llc | Substrate such as paving brick with non-powered photoluminescent portion |
US8192829B2 (en) | 2007-03-08 | 2012-06-05 | Glow-Mark Technologies, Llc | Cast photoluminescent devices and photoluminescent inserts for substrates |
DE102008057254B4 (en) * | 2008-11-13 | 2013-02-28 | Nightec Gmbh & Co. Kg | Luminescent multi-layered glass sheet |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7238301B2 (en) * | 2004-06-29 | 2007-07-03 | Kimberly-Clark Worldwide, Inc. | Cross-linked encapsulated phosphorescent molecules |
EP2554628B1 (en) * | 2010-03-31 | 2016-07-13 | Sekisui Chemical Co., Ltd. | Surface-treated fluorescent bodies and process for production of surface-treated fluorescent bodies |
US10533996B2 (en) * | 2013-08-19 | 2020-01-14 | University Of Houston | Phosphorescent reporters |
CA3004436C (en) | 2018-05-09 | 2021-06-01 | Paige Whitehead | Biodegradable light wand |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4684592A (en) * | 1984-04-06 | 1987-08-04 | Fuji Photo Film Co., Ltd. | Stimulable phosphor sheet |
US5418062A (en) * | 1990-04-25 | 1995-05-23 | Minnesota Mining And Manufacturing Company | Encapsulated electroluminescent phosphor particles |
US5849218A (en) * | 1997-07-14 | 1998-12-15 | C-Cure Corporation | Fluorescent pool coating |
US6071432A (en) * | 1998-03-31 | 2000-06-06 | Sarnoff Corporation | Long persistence red phosphors |
-
2000
- 2000-12-07 WO PCT/US2000/042694 patent/WO2001042386A2/en active Application Filing
- 2000-12-07 CN CN 00818123 patent/CN1414995A/en active Pending
- 2000-12-07 CA CA002394988A patent/CA2394988A1/en not_active Abandoned
- 2000-12-07 AU AU47148/01A patent/AU4714801A/en not_active Abandoned
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4684592A (en) * | 1984-04-06 | 1987-08-04 | Fuji Photo Film Co., Ltd. | Stimulable phosphor sheet |
US5418062A (en) * | 1990-04-25 | 1995-05-23 | Minnesota Mining And Manufacturing Company | Encapsulated electroluminescent phosphor particles |
US5849218A (en) * | 1997-07-14 | 1998-12-15 | C-Cure Corporation | Fluorescent pool coating |
US6071432A (en) * | 1998-03-31 | 2000-06-06 | Sarnoff Corporation | Long persistence red phosphors |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7993722B2 (en) | 2007-03-08 | 2011-08-09 | Glow-Mark Technologies, Llc | Substrate such as paving brick with non-powered photoluminescent portion |
US8192829B2 (en) | 2007-03-08 | 2012-06-05 | Glow-Mark Technologies, Llc | Cast photoluminescent devices and photoluminescent inserts for substrates |
DE102008057254B4 (en) * | 2008-11-13 | 2013-02-28 | Nightec Gmbh & Co. Kg | Luminescent multi-layered glass sheet |
Also Published As
Publication number | Publication date |
---|---|
CN1414995A (en) | 2003-04-30 |
AU4714801A (en) | 2001-06-18 |
WO2001042386A3 (en) | 2002-01-03 |
CA2394988A1 (en) | 2001-06-14 |
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