US20030173540A1
Expired / Lapsed
US
⏱️ 0.0 years remaining
Long persistent phosphor incorporated within a settable material
Assignee: Global Products Sales and Marketing LLC
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Filing: 2000-12-07
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Granted: —
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Expires: 2020-12-07
Abstract
Abstract 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. Typical particulate mean domain size ranges from 1 to 60 microns. The phosphor particulate is thereafter encapsulated within a water impervious coating material such as silicon oxide or fluoride. 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. Typical formulation ratios range from 0.1 to 30 volume percent of particulate. A method of forming a phosphorescent solid article is also disclosed.
Inventors
- 👤 Bradford Mortz
- 👤 Robert Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:33
CPC Classifications
C; C04; C04B; C04B14/00; C04B14/02; C04B14/36; C09; C09K; C09K11/00; C09K11/02; C09K11/025; C09K11/08; C09K11/77; C09K11/7728; C09K11/7729; C09K11/7731; C09K11/7783; C09K11/7784; C09K11/7786; C04B2111/00; C04B2111/80; C04B2111/807
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
63 words
1 . A process for incorporating a long persistent phosphor within a settable material, comprising the steps of: firing a doped phosphor; grinding said doped phosphor into a phosphor particulate having a mean domain size; encapsulating said phosphor particulate within a water impervious coating material; and mixing a specified volume ratio of said encapsulated phosphor particulates within the settable material during a pre-set.
Claim 2
Dependent Claim
63 words
1 . A process for incorporating a long persistent phosphor within a settable material, comprising the steps of: firing a doped phosphor; grinding said doped phosphor into a phosphor particulate having a mean domain size; encapsulating said phosphor particulate within a water impervious coating material; and mixing a specified volume ratio of said encapsulated phosphor particulates within the settable material during a pre-set.
Claim 3
Dependent Claim
19 words
2 . The process according to claim 1 , wherein said phosphor is Strontium Sulfide with a Europium dopant.
Claim 4
Dependent Claim
18 words
3 . The process according to claim 1 , wherein said phosphor is a mixed Calcium Strontium Sulfide.
Claim 5
Dependent Claim
19 words
4 . The process according to claim 1 , wherein said phosphor particulate is encapsulated within a fluoride coating.
Claim 6
Dependent Claim
20 words
5 . The process according to claim 1 , wherein said phosphor particulate is encapsulated within a silicon oxide coating.
Claim 7
Dependent Claim
25 words
6 . The process according to claim 1 , wherein said phosphor particulate is ground to a mean domain size of 30 to 60 microns.
Claim 8
Dependent Claim
22 words
7 . The process according to claim 1 further comprising the step of: setting said settable material to form a phosphorescent solid.
Claim 9
Dependent Claim
58 words
8 . A phosphorescent settable formulation comprising: 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, said particulate having a water impervious coating thereover selected from the group consisting of: silicon oxide and fluoride; and a settable material carrier for said particulate.
Claim 10
Dependent Claim
58 words
8 . A phosphorescent settable formulation comprising: 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, said particulate having a water impervious coating thereover selected from the group consisting of: silicon oxide and fluoride; and a settable material carrier for said particulate.
Claim 11
Dependent Claim
19 words
9 . The formulation according to claim 8 wherein said particulate is present from 5 to 20 volume percent.
Claim 12
Dependent Claim
19 words
10 . The formulation according to claim 8 wherein said particulate is present from 10 to 20 volume percent.
Claim 13
Dependent Claim
17 words
11 . The formulation according to claim 8 wherein said particulate is strontium sulfide doped with europium.
Claim 14
Dependent Claim
14 words
12 . The formulation according to claim 11 further comprising a second lanthanide dopant.
Claim 15
Dependent Claim
20 words
13 . The formulation according to claim 8 wherein the mean particle domain size of between 1 and 45 microns.
Claim 16
Dependent Claim
46 words
14 . The formulation according to claim 8 wherein said settable material carrier is selected from the group consisting of: gel, acrylic resin, epoxy resin, polymeric monomers, polymeric oligomers, crosslinkable polymers, silicone resins, rubbers, concrete, latexes, water glass, solvated polymers, paints, caulks, plaster, lacquer and varnish.
Claim 17
Dependent Claim
15 words
15 . A formulation of claim 1 obtainable by the process of claim 8 .
Claim 18
Dependent Claim
22 words
16 . A method of rendering an solid article phosphorescent which method comprises setting a formulation of claims 8 to 14 .
Claim 19
Dependent Claim
15 words
17 . The method of claim 16 further comprising: applying said formulation to a substrate.
Claim 20
Dependent Claim
18 words
18 . The method of claim 16 wherein said formulation is set such that said article is free-standing.
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