WO2000054614A2 - Revetements antistatiques, anti-etincelles destines a des environnements sujets a des explosions - Google Patents

Revetements antistatiques, anti-etincelles destines a des environnements sujets a des explosions Download PDF

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Publication number
WO2000054614A2
WO2000054614A2 PCT/US2000/007252 US0007252W WO0054614A2 WO 2000054614 A2 WO2000054614 A2 WO 2000054614A2 US 0007252 W US0007252 W US 0007252W WO 0054614 A2 WO0054614 A2 WO 0054614A2
Authority
WO
WIPO (PCT)
Prior art keywords
coating
static
sparking
polymer
coatings
Prior art date
Application number
PCT/US2000/007252
Other languages
English (en)
Other versions
WO2000054614A3 (fr
Inventor
W. Thor Zollinger
Kerry Klingler
Charles B. Isom
Scott Bauer
Original Assignee
Solex Robotics Systems, Inc.
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 Solex Robotics Systems, Inc. filed Critical Solex Robotics Systems, Inc.
Priority to AU58659/00A priority Critical patent/AU5865900A/en
Publication of WO2000054614A2 publication Critical patent/WO2000054614A2/fr
Publication of WO2000054614A3 publication Critical patent/WO2000054614A3/fr

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
    • C09D5/24—Electrically-conducting paints
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B21/00—Apparatus or methods for working-up explosives, e.g. forming, cutting, drying
    • C—CHEMISTRY; METALLURGY
    • C06—EXPLOSIVES; MATCHES
    • C06B—EXPLOSIVES OR THERMIC COMPOSITIONS; MANUFACTURE THEREOF; USE OF SINGLE SUBSTANCES AS EXPLOSIVES
    • C06B45/00—Compositions or products which are defined by structure or arrangement of component of product
    • C06B45/12—Compositions or products which are defined by structure or arrangement of component of product having contiguous layers or zones
    • 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
    • C09D127/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers
    • C09D127/02—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment
    • C09D127/12—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Coating compositions based on derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms

Definitions

  • This invention generally relates to a coating, and a method of producing a coating, that can be used in explosive environments. More specifically, this invention relates to an anti-static, non-sparking coating that can be applied to various components such that the components may be safely used in corrosive and explosive environments.
  • plastics enclosures or plastics parts of enclosure for example, for Group IIA and IIB apparatus to a maximum of 100 cm 2 except that this may be increased to a maximum of 400 cm 2 if the exposed areas of plastics are surrounded by conductive earth- grounded frames); or (c) by virtue of the size, shape, and lay-out, or other protective methods, such that dangerous electrostatic charges are not likely to occur.
  • the present invention is directed to an anti-static, non-sparking coating that can be applied to various components such that the components may be safely used in corrosive and explosive environments.
  • Fluorine-containing polymers or fluoropolymers
  • fluoropolymers are an important class of polymers and include for example, fluoroelastomers and fluoroplastics. Within this class are polymers of high thermal stability and usefulness at high temperatures, and extreme toughness and flexibility at very low temperatures. Many of these polymers are almost totally insoluble in a wide variety of organic solvents. See, for example F.W. Billmeyer, Textbook of Polymer Science, 3rd ed., pp 398-403, John Wiley & Sons, New York (1984). These polymers, however, cannot be used in explosive environments because they encourage the accumulation of electrostatic charges on the surfaces of the coated component.
  • coatings that are used in explosive environments would have low resistivities to ward off electrostatic charges.
  • a "perfect" conductor would have zero resistivity and a "perfect” insulator an infinite resistivity.
  • Metals such as copper and gold
  • alloys such as manganin and nichrome
  • semiconductors such as carbon or germanium
  • the resistivities of insulators exceed those of metals by a factor of the order of 10 22 .
  • Carbon powder was added to the coatings to increase the conductivity. Carbon percentages from about 10% to about 50% passed the certification testing with resistivities less than 1 G ⁇ . The carbon powder enhances the ability of the polymer
  • Halar is a trademark of Ausimont of Morristown, New Jersey for ethylene-chlorotrifluoroethylene (ECTFE).
  • Halar coatings have favorable characteristics that include: resistance to strong acids, such as sulfuric, nitric, hydrochloric, and hydrofluoric, over a wide temperature range; the ability to handle powder bleaching agents, such as sodium hypochlorite; resistance to strong bases, such as sodium hydroxide and potassium hydroxide; and resistance to strong polar solvents, such as n-methyl pyrrolidone and dimethyl formamide, that would dissolve other polymers.
  • Halar fluoropolymers are advertised as incapable of being dissolved by any known solvent up to 300°F.
  • Halar fluoropolymer exhibit extraordinary smoothness.
  • Halar polymers cannot be certified for explosive environments.
  • a series of five sample coatings were developed with graphite being added to the fluoropolymer coating in percentages ranging from about 10%> to about 50%>. The graphite was added to the coating to increase its conductivity and resistance to building up static. The same insulation resistance tests were run on each sample and the results were all well below the 1.0 x 10 10 required.
  • the fluoropolymer coating used on the submergible vehicle has 10%> graphite added to it.
  • the present invention describes a method and materials for coating components for use in hazardous locations that are capable of meeting Class I Division 1 certification standards that are required for safe use within an explosive environment, as specified in the National Electric Code.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Elimination Of Static Electricity (AREA)

Abstract

L'invention a trait à un revêtement antistatique, anti-étincelle qui peut être appliqué sur divers composants de telle manière que l'on peut utiliser ces derniers en toute sécurité dans des environnements sujets à des explosions.
PCT/US2000/007252 1999-03-18 2000-03-17 Revetements antistatiques, anti-etincelles destines a des environnements sujets a des explosions WO2000054614A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU58659/00A AU5865900A (en) 1999-03-18 2000-03-17 Anti-static, non-sparking coatings for explosive environments

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12521699P 1999-03-18 1999-03-18
US60/125,216 1999-03-18

Publications (2)

Publication Number Publication Date
WO2000054614A2 true WO2000054614A2 (fr) 2000-09-21
WO2000054614A3 WO2000054614A3 (fr) 2001-01-11

Family

ID=22418695

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/007252 WO2000054614A2 (fr) 1999-03-18 2000-03-17 Revetements antistatiques, anti-etincelles destines a des environnements sujets a des explosions

Country Status (2)

Country Link
AU (1) AU5865900A (fr)
WO (1) WO2000054614A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6994305B2 (en) * 2001-04-07 2006-02-07 Robertshaw Controls Company Magnetic mounting assembly
CN105901780A (zh) * 2016-05-04 2016-08-31 曾新民 一种含石墨烯的女性暖宫保健内裤制作方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4902444A (en) * 1988-03-18 1990-02-20 E. I. Dupont De Nemours And Company Conductive fluoropolymers
US5795500A (en) * 1997-03-03 1998-08-18 Xerox Corporation Electrically conductive coatings comprising fluorinated carbon filled fluoroelastomer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4902444A (en) * 1988-03-18 1990-02-20 E. I. Dupont De Nemours And Company Conductive fluoropolymers
US5795500A (en) * 1997-03-03 1998-08-18 Xerox Corporation Electrically conductive coatings comprising fluorinated carbon filled fluoroelastomer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6994305B2 (en) * 2001-04-07 2006-02-07 Robertshaw Controls Company Magnetic mounting assembly
CN105901780A (zh) * 2016-05-04 2016-08-31 曾新民 一种含石墨烯的女性暖宫保健内裤制作方法

Also Published As

Publication number Publication date
AU5865900A (en) 2000-10-04
WO2000054614A3 (fr) 2001-01-11

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