GB2021797A - Suppression of spark discharges from negative triboelectrically charged surfaces - Google Patents

Suppression of spark discharges from negative triboelectrically charged surfaces

Info

Publication number
GB2021797A
GB2021797A GB7916625A GB7916625A GB2021797A GB 2021797 A GB2021797 A GB 2021797A GB 7916625 A GB7916625 A GB 7916625A GB 7916625 A GB7916625 A GB 7916625A GB 2021797 A GB2021797 A GB 2021797A
Authority
GB
United Kingdom
Prior art keywords
isopropylbenzene
substituent
spark discharges
suppression
constant
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.)
Granted
Application number
GB7916625A
Other versions
GB2021797B (en
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Priority to GB7916625A priority Critical patent/GB2021797B/en
Publication of GB2021797A publication Critical patent/GB2021797A/en
Application granted granted Critical
Publication of GB2021797B publication Critical patent/GB2021797B/en
Expired legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C07—ORGANIC CHEMISTRY
    • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
    • C07C53/00—Saturated compounds having only one carboxyl group bound to an acyclic carbon atom or hydrogen
    • C07C53/15—Saturated compounds having only one carboxyl group bound to an acyclic carbon atom or hydrogen containing halogen
    • C07C53/19—Acids containing three or more carbon atoms
    • C07C53/21—Acids containing three or more carbon atoms containing fluorine
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
    • G03C1/00—Photosensitive materials
    • G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
    • G03C1/85—Photosensitive materials characterised by the base or auxiliary layers characterised by antistatic additives or coatings

Landscapes

  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Coating Of Shaped Articles Made Of Macromolecular Substances (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

A method of suppressing spark discharges from a surface liable to be or become negative charged, e.g. a photographic film, in which the surface is treated with an isopropylbenzene carrying a substituent with a Hammett sigma p constant of from -0.17 to +0.82 in the 2- or 4-position relative to the isopropyl group or a substituent with a Hammett sigma m constant of from 0.0 to 0.88 in the 3-position relative to the isopropyl group. The isopropylbenzene derivative preferably bears an anionic group in the para position which has a fluorinated organic anion which confers surfactant properties and ensures negative contact electrification of the surface. The compound is preferably applied in the gelatin top coat of a film. In Table 1, isopropylbenzene with only one substituent in the o or p positions are exemplified and in the example, isopropylbenzene or its peroxide are used.
GB7916625A 1978-05-15 1979-05-14 Suppression of spark descharges from negative triboelectrically charged surfaces Expired GB2021797B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB7916625A GB2021797B (en) 1978-05-15 1979-05-14 Suppression of spark descharges from negative triboelectrically charged surfaces

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB1955478 1978-05-15
GB7916625A GB2021797B (en) 1978-05-15 1979-05-14 Suppression of spark descharges from negative triboelectrically charged surfaces

Publications (2)

Publication Number Publication Date
GB2021797A true GB2021797A (en) 1979-12-05
GB2021797B GB2021797B (en) 1982-09-22

Family

ID=26254121

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7916625A Expired GB2021797B (en) 1978-05-15 1979-05-14 Suppression of spark descharges from negative triboelectrically charged surfaces

Country Status (1)

Country Link
GB (1) GB2021797B (en)

Also Published As

Publication number Publication date
GB2021797B (en) 1982-09-22

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee