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US 7,476,874 B2Granted
Self indicating radiation alert dosimeter
AssigneeJP Laboratories, Inc.
InventorGordhanbhai N. Patel
Life of this patent
Estimating the term…
Abstract
Described as a self-indicating instant radiation dosimeter (1001) for monitoring high energy radiations, such as X-ray. The dosimeter contains a radiation sensitive, color changing, indicating composition (10), e.g., a diacetylene (R—C≡C—C≡C—R′, where R and R′ are substituents groups) or a radiochromic dye, a polymeric binder (20) and optionally a shelf life extender (50) or an activator (40). The radiation sensitive composition (10) changes color instantly when exposed to high energy radiation. The dose is estimated by comparing the color with a color reference chart or more accurately with a spectrophotometer or an optical densitometer. The radiation sensitive composition (10) is protected from low energy radiation such as UV light, by a layer of low energy absorbing materials, such as UV absorbers.
Claims165
A radiation monitoring device comprising:
- a substrate having thereon a radiation sensitive material comprising:
- a shelf life extender and
- at least one imaging layer containing said radiation sensitive material, having the capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV wherein said radiation sensitive material has the capability of developing a detectable color change when exposed to ionizing radiation, selected from the group consisting of a diacetylene, a mixture of radiochromic dye, a pH sensitive dye and an acid producing compound;
- and
- at least one indicator selected from the group consisting of an indicator capable of indicating a false positive or tampering, a UV exposure indicator, a temperature exposure indicator and a self canceling or time-temperature indicator.
2 more elements
A radiation monitoring device comprising:
- a
- substrate having thereon a radiation sensitive material comprising:
- a shelf life extender and at least one imaging layer containing said radiation sensitive material, having the capability of developing detectable color change when exposed to ionizing radiation-having energy higher than 5 eV, and means for protecting said radiation sensitive material from undesirable effect of radiation having an energy level of at least as low as visible light wherein said radiation sensitive material has the capability of developing a detectable color change when exposed to ionizing radiation, selected from the group consisting of a diacetylene, a mixture of radiochromic dye, a pH sensitive dye and an acid producing compound.
A radiation monitoring device comprising:
- a substrate having thereon a radiation sensitive material comprising:
- a shelf life extender and
- at least one imaging layer containing said radiation sensitive material, having the capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV wherein said radiation sensitive material is selected from the group consisting of a diacetylene, a mixture of radiochromic dye, a pH sensitive dye and an acid producing compound
- wherein said shelf life extender comprises one or more members of the group consisting of reactive species quenchers, free radical scavengers, oxygen scavengers, antioxidants, reaction inhibitors of the selected reactive species, thermo-oxidation inhibitors, photo-oxidation inhibitors, hydroperoxide decomposers, H-donors, UV stabilizers, UV absorbers, UV reflectors, and fluorescent optical brighteners.
1 more element
A radiation monitoring device comprising:
- a substrate;
- at least one imaging layer comprising a radiochromic material having capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV;
- a binder;
- a protective layer;
- and
- at least one reference chart comprising at least two colors corresponding to said detectable color change at at least two predetermined levels of ionizing radiation wherein said device further comprises indicia with a predetermined optical density wherein when said device is exposed to radiation said device has an optical density corresponding to said predetermined optical density.
3 more elements
A radiation monitoring device comprising:
- a substrate;
- at least one imaging layer comprising a radiochromic material having capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV;
- a binder;
- a protective layer;
- and
- at least one reference chart comprising at least one color corresponding to said detectable color change at a predetermined level of ionizing radiation wherein said binder is an organic or inorganic polymer and wherein said reference chart is a color reference chart comprising partially polymerized diacetylene and polydiacetylene.
3 more elements
A radiation monitoring device comprising:
- a substrate;
- at least one imaging layer comprising a radiochromic material having capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV;
- a binder;
- a protective layer;
- and
- at least one reference chart comprising at least one color corresponding to said detectable color change at a predetermined level of ionizing radiation further comprising more than one said imaging layer and more than one reference chart wherein said radiochromic material is selected from the group consisting of a diacetylene, a mixture of radiochromic dye, a pH sensitive dye and an acid producing compound.
3 more elements
A radiation monitoring device comprising:
- a substrate;
- at least one imaging layer comprising a radiochromic material having capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV;
- a binder;
- a protective layer;
- and
- at least one reference chart comprising at least one color corresponding to said detectable color change at a predetermined level of ionizing radiation wherein said radiochromatic material is a diacetylene comprising a symmetrical or asymmetrical fatty acid of R1—(CH2)n—C≡C—C≡C—(CH2)m—R2 or their derivatives, where at least one of the R1 or R2 is —COOH and n and m are independently selected from 1-10.
3 more elements
A radiation monitoring device comprising:
- a substrate;
- at least one imaging layer comprising a radiochromic material having capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV;
- a binder;
- a protective layer;
- and
- at least one reference chart comprising at least one color corresponding to said detectable color change at a predetermined level of ionizing radiation_wherein said radiochromic material is a diacetylene comprising CH3(CH2)9—C≡C—C≡C—(CH2)8CONH(CH2)3CH3;
- CH3(CH2)11—C≡C—C≡C—(CH2)8CONHCH2CH3;
- CH3(CH2)11—C≡C—C≡C—(CH2)8CONH(CH2)3CH3;
- CH3(CH2)11—C≡C—C≡C—(CH2)8CONHC6H5;
- and CH3(CH2)9—C≡C—C≡C—(CH2)8CONHC6H5.
7 more elements
A radiation monitoring device comprising:
- a substrate;
- at least one imaging layer comprising a radiochromic material having capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV;
- a binder;
- a protective layer;
- and
- at least one reference chart comprising at least one color corresponding to said detectable color change at a predetermined level of ionizing radiation wherein said device comprises diacetylene which is inactive and activated by heating including melting, phase change, dissolution or annealing said diacetylene.
3 more elements
A radiation monitoring device comprising:
- a substrate;
- at least one imaging layer comprising a radiochromic material having capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV;
- a binder;
- a protective layer;
- and
- at least one reference chart comprising at least one color corresponding to said detectable color change at a predetermined level of ionizing radiation wherein said device comprises diacetylene made inactive by forming a solid solution or dissolution.
3 more elements
A radiation monitoring device comprising:
- a substrate;
- at least one imaging layer comprising a radiochromic material having capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV;
- a binder;
- a protective layer;
- and
- at least one reference chart comprising at least one color corresponding to said detectable color change at a predetermined level of ionizing radiation wherein said diacetylenes are crystallized from amorphous state or solid solution by annealing.
3 more elements
A radiation monitoring device comprising:
- a substrate;
- at least one imaging layer comprising a radiochromic material having capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV;
- a binder;
- a protective layer;
- and
- at least one reference chart comprising at least one color corresponding to said detectable color change at a predetermined level of ionizing radiation and a shelf life extender comprising one or more of a heat stabilizer, a quencher of reactive species, scavengers of radical, scavengers of oxygen, antioxidant, inhibitor of reactive species, preventor of reactive species, thermo-oxidative preventor, photo-oxidative preventor, hydroperoxide decomposer, H-donor, metal destabilizer, UV stabilizer, UV absorber, UV reflector, fluorescent, optical brightener or mixture thereof wherein said radiochromic material is a diacetylene.
3 more elements
A radiation monitoring device comprising:
- a substrate;
- at least one imaging layer comprising a radiochromic material having capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV;
- a binder;
- a protective layer;
- and
- at least one reference chart comprising at least one color corresponding to said detectable color change at a predetermined level of ionizing radiation and a shelf life extender comprising one or more of a heat stabilizer, a quencher of reactive species, scavengers of radical, scavengers of oxygen, antioxidant, inhibitor of reactive species, preventor of reactive species, thermo-oxidative preventor, photo-oxidative preventor, hydroperoxide decomposer, H-donor, metal destabilizer, UV stabilizer, UV absorber, UV reflector, fluorescent, optical brightener or mixture thereof wherein said radiochromic material is selected from the group consisting of a diacetylene, a mixture of radiochromic dye, a pH sensitive dye and an acid producing compound wherein said shelf life extender is selected from phenols, polyphenols, substituted phenols, hydroquinones, aromatic amines, aromatic hydrazines, ferric chloride, cupric chloride, sulfur, radical inhibitors, thermo-oxidative preventor, photo-oxidative preventor, hydroperoxide decomposer, H-donors, alkyl sulfides, alkyl phosphites, aromatic amines, alkyl phenols, metal dithiophosphates, metal dithiocarbamates, tetramethylpiperidines, bisphenols, thiobisphenols, organophosphites, thioesters, aromatic amines, phenols, sterically hindered phenols, sterically hindered amine, organic compound of trivalent phosphorus, organic compound of sulfur, metal salt of dialkyldithiocarbamate, dithiophosphate, ester of 3,3-thiodipropionic acid, sulfide, phosphate, phosphonite, benzofuranone or mixture thereof.
3 more elements
A radiation monitoring device comprising:
- a substrate;
- at least one imaging layer comprising a radiochromic material having capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV;
- a binder;
- a protective layer;
- and
- at least one reference chart comprising at least one color corresponding to said detectable color change at a predetermined level of ionizing radiation and a shelf life extender comprising one or more of a heat stabilizer, a quencher of reactive species, scavengers of radical, scavengers of oxygen, antioxidant, inhibitor of reactive species, preventor of reactive species, thermo-oxidative preventor, photo-oxidative preventor, hydroperoxide decomposer, H-donor, metal destabilizer, UV stabilizer, UV absorber, UV reflector, fluorescent, optical brightener or mixture thereof wherein said radiochromic material is selected from the group consisting of a diacetylene, a mixture of radiochromic dye, a pH sensitive dye and an acid producing compound wherein said shelf life extenders comprise a compound selected from 2,6-di-tert-butyl-4-ethylphenol (BHT), 2,3-t-butyl-4-hydroxanisole, 2,6-di-tert-butyl-4-ethylphenol, m-xylylenediamine, 1,3-bis(aminomethyl)cyclohexane, 1,3-bis(3-aminomethylphenyl-methylamino)-2-propanol, 1,3-bis(N,N-N-diglycidylaminomethyl)cyclohexane, N,N,N′,N′-tetraglycidyl-m-xylenediamine, poly[4,4-methylenebis(phenyl isocyanate)-alt-1,4-butanediol;
- poly[N,N-bis(2,2,6,6-tetramethyl-4-piperidinyl)-1,6-hexanediamine-co-2,4-dichloro-6-morpholino-1,3,5-tria;
- 1,5,8,12-tetrakis[4,6-bis(N-butyl-N-1,2,2,6,6-pentamethyl-4-piperidylamino)-1,3,5-triazin-2-yl]-1,5,8,12-tetraazadode, 5,5-methylenebis(2-hydroxy-4-methoxybenzophenone or mixture thereof.
5 more elements
A process of forming a radiation monitoring device comprising:
- a substrate;
- at least one imaging layer comprising a radiochromic material having capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV;
- a binder;
- a protective layer;
- and
- at least one reference chart comprising at least one color corresponding to said detectable color change at a predetermined level of ionizing radiation comprising cooling a mixture of a diacetylene, a shelf life extender and a binder in a solvent.
3 more elements
A process of forming a radiation monitoring device comprising:
- a substrate;
- at least one imaging layer comprising a radiochromic material having capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV;
- a binder;
- a protective layer;
- and
- at least one reference chart comprising at least one color corresponding to said detectable color change at a predetermined level of ionizing radiation wherein said process comprises cooling a mixture of a diacetylene, a shelf life extender and a molten polymer.
3 more elements
A process of forming a radiation monitoring device comprising:
- a substrate;
- at least one imaging layer comprising a radiochromic material having capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV;
- a binder;
- a protective layer;
- and
- at least one reference chart comprising at least one color corresponding to said detectable color change at a predetermined level of ionizing radiation wherein said process comprises UV or peroxide curing a mixture of monomer, oligomer and diacetylene.
3 more elements
A process of forming a self indicating radiation monitoring device comprising:
- a substrate;
- at least one imaging layer comprising a radiochromic material having capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV;
- a binder;
- a protective layer;
- and
- at least one reference chart comprising at least one color corresponding to said detectable color change at a predetermined level of ionizing radiation wherein said process comprises heating said mixture at elevated temperature to dissolve diacetylene;
- heating at further higher temperature to fuse a plastisol;
- and cooling to a lower temperature.
5 more elements
A radiation monitoring device comprising:
- a substrate;
- at least one imaging layer comprising a radiochromic material having capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV;
- a binder;
- a protective layer;
- and
- at least one reference chart comprising at least two colors corresponding to said detectable color change at least two predetermined levels of ionizing radiation wherein said device further comprises an indicator capable of indicating a false positive or tampering.
3 more elements
A radiation monitoring device comprising:
- a substrate;
- at least one imaging layer comprising a radiochromic material having capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV;
- a binder;
- a protective layer;
- and
- at least one reference chart comprising at least two colors corresponding to said detectable color change at least two predetermined levels of ionizing radiation wherein said device further comprises at least one indicator selected from a UV exposure indicator, a temperature exposure indicator, a self canceling indicator and a time temperature indicator.
3 more elements
A radiation monitoring device comprising:
- a substrate;
- at least one imaging layer comprising a radiochromic material having capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV;
- a binder;
- a protective layer;
- and
- at least one reference chart comprising at least one color corresponding to said detectable color change at a predetermined level of ionizing radiation wherein said device comprises indicia with a predetermined optical density wherein when said device is exposed to radiation said device has an optical density corresponding to said predetermined optical density wherein said device comprises indicia which disappear with exposure to radiation wherein when indicia is in the form of numbers.
3 more elements
A radiation monitoring device comprising:
- a substrate;
- a radiation sensitive material coated on said substrate wherein said radiation sensitive material comprises a shelf life extender and radiochromic material having capability of developing detectable color change when exposed to ionizing radiation;
- and
- a protective layer wherein said radiochromic material has at least one set of conjugated alkynes.
1 more element
A radiation monitoring device comprising:
- a substrate with a thickness from 1 to 10,000 μm;
- at least one imaging layer comprising a diacetylene material selected from tricosa-10,12-diynoic acid, pentacosa-10,12-diynoic acid, their ester, amide, organic and inorganic salt, or mixtures thereof having capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV;
- a binder;
- a protective layer;
- and
- at least one reference chart comprising at least one color corresponding to said detectable color change at a predetermined level of ionizing radiation;
- wherein said device is 0.5 mm to 1 meter wide and 1 mm to 1 meter long.
4 more elements
A radiation monitoring device comprising:
- a substrate;
- at least one radiation sensitive material having capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV;
- a binder;
- at least one reference chart comprising at least two colors corresponding to said detectable color change at at least two predetermined levels of ionizing radiation;
- at least one opaque protective layer;
- and
- wherein said radiation sensitive material is selected from the group consisting of a diacetylene, a mixture of radiochromic dye, a pH sensitive dye and an acid producing compound.
4 more elements
A radiation monitoring device comprising:
- a substrate;
- at least one radiation sensitive material having capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV;
- a binder;
- at least one reference chart comprising at least one color corresponding to said detectable color change at a predetermined level of ionizing radiation;
- at least one opaque protective layer;
- capable of monitoring at least two different dose ranges wherein one dose range of said dose ranges is less than 1,000 rads wherein said dose range is indicated by a color selected from blue and green;
- and
- wherein said radiation sensitive material is selected from the group consisting of a diacetylene, a mixture of radiochromic dye, a pH sensitive dye and an acid producing compound.
5 more elements
A radiation monitoring device comprising:
- a substrate;
- at least one radiation sensitive material having capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV;
- a binder;
- at least one reference chart comprising at least one color corresponding to said detectable color change at a predetermined level of ionizing radiation;
- at least one opaque protective layer;
- wherein said device is capable of monitoring at least two different dose ranges wherein one dose range of said dose ranges is less than 1,000 rads wherein said dose range is indicated by a color selected from red, purple and violet;
- and
- wherein said radiation sensitive material is selected from the group consisting of a diacetylene, a mixture of radiochromic dye, a pH sensitive dye and an acid producing compound.
5 more elements
A radiation monitoring device comprising:
- a substrate;
- at least one radiation sensitive material having capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV;
- a binder;
- at least one reference chart comprising at least one color corresponding to said detectable color change at a predetermined level of ionizing radiation;
- at least one opaque protective layer wherein said device comprises a well and said radiation sensitive material is in said well;
- and
- wherein said radiation sensitive material is selected from the group consisting of a diacetylene, a mixture of radiochromic dye, a pH sensitive dye and an acid producing compound.
4 more elements
A radiation monitoring device comprising:
- a substrate
- at least one imaging layer comprising a radiochromic material having capability of developing color change when exposed to ionizing radiation having energy higher than 5 eV;
- a binder;
- a protective layer;
- and
- at least one indicator for monitoring at least one environmental parameter.
3 more elements
A radiation monitoring device comprising:
- a substrate;
- at least one imaging layer comprising a radiochromic material having capability of developing detectable color change when exposed to ionizing radiation having energy higher than 5 eV;
- a binder;
- a protective layer;
- and
- at least one reference chart comprising at least one color corresponding to said detectable color change at a predetermined level of ionizing radiation-wherein said substrate comprises at least one material chosen from the group consisting of polycarbonates, polystyrenes, polyolefin, polyacrylate, polyvinyl derivative, polyester derivative, polyvinylchloride, cellulose derivative, polyurethane, polyethylene terephthalate, silicone resin, siloxane resin, triethylene glycol dimethacrylate, epoxy resin and copolymers thereof and
- wherein said radiochromic material is a diacetylene.
4 more elements
Dependencies are inferred from the claim text.