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FR2271938A1 - Thermochromic compsns. for thermographic recording - giving variety of colours with phenolic cpds. and chelating cpds. - Google Patents

Thermochromic compsns. for thermographic recording - giving variety of colours with phenolic cpds. and chelating cpds.

Info

Publication number
FR2271938A1
FR2271938A1 FR7418079A FR7418079A FR2271938A1 FR 2271938 A1 FR2271938 A1 FR 2271938A1 FR 7418079 A FR7418079 A FR 7418079A FR 7418079 A FR7418079 A FR 7418079A FR 2271938 A1 FR2271938 A1 FR 2271938A1
Authority
FR
France
Prior art keywords
cpds
compsns
thermochromic
colours
chelating
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
FR7418079A
Other languages
French (fr)
Other versions
FR2271938B1 (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.)
ISSEC
Original Assignee
ISSEC
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 ISSEC filed Critical ISSEC
Priority to FR7418079A priority Critical patent/FR2271938A1/en
Publication of FR2271938A1 publication Critical patent/FR2271938A1/en
Application granted granted Critical
Publication of FR2271938B1 publication Critical patent/FR2271938B1/fr
Granted legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
    • B41M5/32—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers one component being a heavy metal compound, e.g. lead or iron
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
    • B41M5/323—Organic colour formers, e.g. leuco dyes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)

Abstract

Thermochromic compsns. and thermographic recording materials contg. the compsns. are claimed, the compsn. contg. at least a cpd. of formula (I) or (II): where Ri is H or electron repelling gps. in positions 5,6,7 and 8 in (I); R'i is H or electron repelling or attracting gps. in positions 4', 5', 6' and 7' and 4", 5", 6" and 7", formulae (I) and (II) and Rj is H or electron repelling gps. in positions 5,6,7,8,9 and 10 in (II). (I) and (II) (both known cpds.) produce a colour change when heated at >180 degrees C, and, when used with a reactant, give a sharper colour change at a lower temp. than when either (I) or (II) is used alone. Use of a reactant also gives colours different to that given by (I) or (II) alone. Colour obtd. varies from chestnut violet-red to pink.
FR7418079A 1974-05-24 1974-05-24 Thermochromic compsns. for thermographic recording - giving variety of colours with phenolic cpds. and chelating cpds. Granted FR2271938A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7418079A FR2271938A1 (en) 1974-05-24 1974-05-24 Thermochromic compsns. for thermographic recording - giving variety of colours with phenolic cpds. and chelating cpds.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7418079A FR2271938A1 (en) 1974-05-24 1974-05-24 Thermochromic compsns. for thermographic recording - giving variety of colours with phenolic cpds. and chelating cpds.

Publications (2)

Publication Number Publication Date
FR2271938A1 true FR2271938A1 (en) 1975-12-19
FR2271938B1 FR2271938B1 (en) 1976-10-15

Family

ID=9139226

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7418079A Granted FR2271938A1 (en) 1974-05-24 1974-05-24 Thermochromic compsns. for thermographic recording - giving variety of colours with phenolic cpds. and chelating cpds.

Country Status (1)

Country Link
FR (1) FR2271938A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2415009A1 (en) * 1977-12-15 1979-08-17 Appleton Paper Inc THERMOSENSITIVE RECORDING SUPPORT

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2415009A1 (en) * 1977-12-15 1979-08-17 Appleton Paper Inc THERMOSENSITIVE RECORDING SUPPORT

Also Published As

Publication number Publication date
FR2271938B1 (en) 1976-10-15

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Legal Events

Date Code Title Description
ST Notification of lapse