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WO2015051062A1 - Revêtements servant à atténuer un rayonnement ionisant, substrats revêtus et procédés associés - Google Patents

Revêtements servant à atténuer un rayonnement ionisant, substrats revêtus et procédés associés Download PDF

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Publication number
WO2015051062A1
WO2015051062A1 PCT/US2014/058731 US2014058731W WO2015051062A1 WO 2015051062 A1 WO2015051062 A1 WO 2015051062A1 US 2014058731 W US2014058731 W US 2014058731W WO 2015051062 A1 WO2015051062 A1 WO 2015051062A1
Authority
WO
WIPO (PCT)
Prior art keywords
coating
ionizing radiation
binder
object surface
substrate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/US2014/058731
Other languages
English (en)
Inventor
Ashok C. Khandkar
Prataprai CHOWDHARY
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bloxr Corp
Original Assignee
Bloxr Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bloxr Corp filed Critical Bloxr Corp
Publication of WO2015051062A1 publication Critical patent/WO2015051062A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/32—Radiation-absorbing paints
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20—Oxides; Hydroxides
    • C08K3/22—Oxides; Hydroxides of metals
    • C08K2003/221—Oxides; Hydroxides of metals of rare earth metal
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
    • C08K2003/3045—Sulfates

Definitions

  • This disclosure relates generally to coatings that attenuate ionizing radiation and, more specifically, to coatings that include a curable binder throughout which a radio-opaque material is dispersed.
  • the coatings may comprise paints that are formulated to attenuating ionizing radiation.
  • This disclosure also relates to methods for coating substrates to attenuate ionizing radiation emanating therefrom, as well as to substrates to which one or more ionizing radiation-attenuating coatings have been applied.
  • a coating that attenuates ionizing radiation may include a binder and a component that attenuates ionizing radiation, which is also referred to herein as an "ionizing radiation attenuating component.”
  • the ionizing radiation attenuating component of a coating may comprise a radio-opaque material.
  • the radio-opaque material may be non-toxic (e.g., does not pose a health risk to humans or animals, etc.) and/or non-hazardous ⁇ e.g., does not pose a threat to surfaces to which it is applied or nearby structures, etc.).
  • the radio-opaque material may be based on an elemental species having an atomic number of at least 50. In other embodiments, the radio-opaque material may be based on an elemental species having an atomic number of 56 or greater. Examples of elements meeting these criteria include, but are not limited to, barium, bismuth and lanthanum.
  • the radio-opaque material may comprise the elemental form ⁇ e.g., a metal, etc.) of such an element.
  • the binder may comprise a chemical compound ⁇ e.g., a molecular compound, a salt, an intermetallic compound or a complex).
  • the radio-opaque material of the ionizing radiation attenuating component of a coating according to this disclosure may include one or more elemental forms of a material that acts as a suitable attenuator of ionizing radiation, as well as one or more chemical compounds that are based on one or more elemental species that have acceptable ionizing radiation-attenuating characteristics.
  • the binder of a coating according to this disclosure may comprise a material such as a resin or a polymer.
  • the resin or polymer may be in a curable form (e.g., in a flowable form, in liquid form (e.g., capable of being sprayed, powder coated, brushed, rolled, printed, etc., onto a substrate), etc.), or it may have already cured.
  • curable form e.g., in a flowable form, in liquid form (e.g., capable of being sprayed, powder coated, brushed, rolled, printed, etc., onto a substrate), etc.
  • curable form e.g., in a flowable form, in liquid form (e.g., capable of being sprayed, powder coated, brushed, rolled, printed, etc., onto a substrate), etc.
  • curable form e.g., in a flowable form, in liquid form (e.g., capable of being sprayed, powder coated, brushed, rolled,
  • curing processes may include coalescence (e.g., by drying, solvent evaporation, etc.), polymerization or the like.
  • the binder may comprise a one-part chemical system.
  • a non-chemical external factor such as heat, radiation or the like may initiate the process of polymerization.
  • the binder may comprise a two-part binder, which may polymerize as two chemical compounds are mixed with each other (e.g., as a chemical catalyst is mixed with the polymerizable material, etc.).
  • aqueous emulsions e.g., so-called "latex" paints, etc.
  • lacquers acrylics, vinyl-acrylics, polyurethanes, epoxies, oils, polyesters, alkyds, vinyl acetate/ethylenes, melamine resins, and the like.
  • a coating may be formulated to enable its application to a substrate in a desired manner (e.g., by spraying, powder coating, rolling, brushing, dip coating, etc.) while providing a desired level of ionizing radiation attenuation.
  • a radio-opaque material may comprise about 20% or more of the total weight of an uncured coating according to this disclosure.
  • the radio-opaque material may comprise about 50% or more of the total weight of an uncured coating.
  • the proportion of the weight of the radio-opaque material to the weight of the cured coating may increase.
  • a radio-opaque material may account for about 40% or more of the weight of a cured coating. In some embodiments, the radio-opaque material may account for about 85% or more of the weight of the cured coating.
  • a layer of the coating When a layer of the coating is spread onto a surface of a substrate, it may attenuate at least some ionizing radiation emanating (e.g., passing through, fluorescing from, reflected from, etc.) that surface.
  • the extent to which a coating may attenuate ionizing radiation may be a function of the type and/or amount of the radio-opaque material present in the coating, as well as a function of the thickness of the coating once it has cured.
  • a coating may be applied to a substrate.
  • a coating may be applied as a single layer (e.g., one coat) or as a plurality of superimposed layers (e.g., a primer and one or more coats, a plurality of coats, etc.).
  • a coating may include the same types of binders as each other (e.g., primers, epoxies, paints, etc.) or they may include different types of binders from one another.
  • different coatings may include the same radio-opaque material, or they may include different radio-opaque materials.
  • a first coating may comprise a first radio-opaque material based on a first elemental species having a first atomic number
  • a second coating may comprise a second radio-opaque material based on a second elemental species having a second atomic number.
  • the first and second atomic numbers may be the same, in which the case the first and second radio-opaque materials may be the same or the first and second radio- opaque materials may be different (e.g., one may comprise an elemental form while another may comprise a chemical compound, they may comprise different chemical compounds, etc.).
  • the first and second atomic numbers may differ from one another.
  • the first coating may be located closer to, or face, a direction from which ionizing radiation is or will be transmitted, while the second coating may be positioned farther away from, or face away from, the direction from which the ionizing radiation is or will be transmitted.
  • the first atomic number may be less than the second atomic number.
  • the first radio-opaque material may be a relatively low-z material, while the second radio-opaque material may be a relatively high-z material.
  • the first coating may be configured to attenuate relatively high energy ionizing radiation
  • the second coating may be configured to attenuate lower energy ionizing radiation, which lower energy ionizing radiation, or fluorescent ionizing radiation, may result from attenuation of the relatively high energy ionizing radiation.
  • Any suitable means may be used to apply a coating to a substrate.
  • Various techniques by which a coating may be applied to a surface of a substrate include, but are not limited to, spraying, powder coating, rolling, brushing, printing and dip coating.
  • those means may vary with one or more of the type of coating being applied ⁇ e.g., liquid (and its viscosity), powder, etc.), the environment and/or context in which the coating is applied and the location on the substrate to which the coating is applied.
  • a coating may be applied to exterior surfaces, to interior surfaces or to a combination of exterior and interior surfaces.
  • a coating may be selectively applied to a surface.
  • Selective coating may be enabled by use of a mask, a screen, or the like.
  • selective coating may be effected by selective processes, such as by directing a focused spray onto desired portions of the surface of a substrate.
  • a coating may be non-selectively applied to a substrate and, thus, comprise a conformal coating or a blanket coating.
  • Examples of various substrates to which a coating may be applied include, without limitation, objects that are present in a particular setting, such as structures (e.g., pipes, valves, etc.) that convey sources of ionizing radiation (e.g., radioactive waste, etc.), equipment from which ionizing radiation may originate, objects that are likely to reflect or fluoresce ionizing radiation, housings or enclosures for any of the foregoing, and other objects with surfaces from which ionizing radiation is likely to or may emanate.
  • Other examples of substrates include architectural features, such as floors, walls, ceilings, doors, windows, panels and the like.
  • a substrate may include one or more surfaces that carry one or more coatings.
  • the coating(s) may include a binder in a cured (e.g., coalesced (or dried), polymerized, etc.) form, as well as a radio-opaque material dispersed throughout the binder.
  • the coating may comprise a single layer.
  • the coating may include two or more layers, which may include the same radio-opaque material or different radio-opaque materials.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

Selon l'invention, un revêtement est mis en oeuvre pour atténuer un rayonnement ionisant. Le revêtement peut comprendre un liant et un constituant qui atténue un rayonnement ionisant. Le constituant d'atténuation de rayonnement ionisant du revêtement peut comprendre un matériau radio-opaque. Le matériau radio-opaque peut être non toxique et/ou non dangereux.
PCT/US2014/058731 2013-10-04 2014-10-02 Revêtements servant à atténuer un rayonnement ionisant, substrats revêtus et procédés associés Ceased WO2015051062A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201361887314P 2013-10-04 2013-10-04
US61/887,314 2013-10-04

Publications (1)

Publication Number Publication Date
WO2015051062A1 true WO2015051062A1 (fr) 2015-04-09

Family

ID=52779125

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2014/058731 Ceased WO2015051062A1 (fr) 2013-10-04 2014-10-02 Revêtements servant à atténuer un rayonnement ionisant, substrats revêtus et procédés associés

Country Status (1)

Country Link
WO (1) WO2015051062A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4935019A (en) * 1986-12-22 1990-06-19 Johnson & Johnson Medical, Inc. Radiopaque polymeric composition
US5334847A (en) * 1993-02-08 1994-08-02 The United States Of America As Represented By The Department Of Energy Composition for radiation shielding
US6599448B1 (en) * 2000-05-10 2003-07-29 Hydromer, Inc. Radio-opaque polymeric compositions
US20040200997A1 (en) * 2000-05-24 2004-10-14 Rengarajan Soundararajan Composition for shielding radioactivity
US20110165269A1 (en) * 2010-01-07 2011-07-07 BLoXR, LLC Radiation Protection System

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4935019A (en) * 1986-12-22 1990-06-19 Johnson & Johnson Medical, Inc. Radiopaque polymeric composition
US5334847A (en) * 1993-02-08 1994-08-02 The United States Of America As Represented By The Department Of Energy Composition for radiation shielding
US6599448B1 (en) * 2000-05-10 2003-07-29 Hydromer, Inc. Radio-opaque polymeric compositions
US20040200997A1 (en) * 2000-05-24 2004-10-14 Rengarajan Soundararajan Composition for shielding radioactivity
US20110165269A1 (en) * 2010-01-07 2011-07-07 BLoXR, LLC Radiation Protection System

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