DE611219C - Process for the preparation of dyes for antihalation of photographic material - Google Patents

Process for the preparation of dyes for antihalation of photographic material

Info

Publication number
DE611219C
DE611219C DEI40065D DEI0040065D DE611219C DE 611219 C DE611219 C DE 611219C DE I40065 D DEI40065 D DE I40065D DE I0040065 D DEI0040065 D DE I0040065D DE 611219 C DE611219 C DE 611219C
Authority
DE
Germany
Prior art keywords
dyes
antihalation
photographic material
preparation
sulfuric acid
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.)
Expired
Application number
DEI40065D
Other languages
German (de)
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.)
IG Farbenindustrie AG
Original Assignee
IG Farbenindustrie AG
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 IG Farbenindustrie AG filed Critical IG Farbenindustrie AG
Priority to DEI40065D priority Critical patent/DE611219C/en
Application granted granted Critical
Publication of DE611219C publication Critical patent/DE611219C/en
Expired 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
    • C09B—ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES, e.g. PIGMENTS; MORDANTS; LAKES
    • C09B57/00—Other synthetic dyes of known constitution
    • 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
    • G03C1/825—Photosensitive materials characterised by the base or auxiliary layers characterised by antireflection means or visible-light filtering means, e.g. antihalation
    • G03C1/83—Organic dyestuffs therefor

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Organic Chemistry (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

Verfahren zur Herstellung von Farbstoffen für Lichthofschutz von, photographischem Material In der Patentschrift 57 6 8 19 sind Lichthof -schutzscÜichten beschrieben, die durch Umsetzung von Furfurol mit doppelt molekularen Mengen von i-Oxy-¢-aninobenzol oder dessen Derivaten gewonnene Farbstoffe enthalten.A process for the preparation of dyes for antihalation by, photographic material in the patent specification 57 6 8 1 9 atrium -schutzscÜichten are described which contain dyes obtained by reacting furfural with double-molecular quantities of i-oxy ¢ -aninobenzol or its derivatives.

Es wurde gefunden, daß für die Zwecke des Lichthofschutzes noch besser geeignete Farbstoffe dadurch hergestellt werden können, daß die in der erwähnten Patentschrift beschriebenen Farbstoffe bei niedriger Temperatur mit Schwefelsäure behandelt werden. Beispiel ioo g eines nach den Beispielen 3, ¢ oder 5 der Patentschrift 576 8 i 9 hergestellten Farbstöffs werden in 750 g Schwefelsäure von 66° B6 bei - 5 bis o° eingetragen und bei derselben Temperatur 2 Stunden lang gerührt. Die Lösung wird auf die fünffache Menge Eis gegossen. Es scheidet sich ein gelblichroter Farbstoff aus, der in Alkohol und Eisessig löslich, schwerer löslich in Aceton ist.It has been found that dyes which are even more suitable for the purpose of antihalation can be prepared by treating the dyes described in the patent mentioned above with sulfuric acid at a low temperature. Example ioo g of according to Examples 3 or 5 ¢ the patent specification 576 8 i 9 Farbstöffs be produced in 750 g of sulfuric acid of 66 ° at B6 - registered and 5 to o ° stirred at the same temperature for 2 hours. The solution is poured onto five times the amount of ice. A yellowish-red dye separates out, which is soluble in alcohol and glacial acetic acid, but less soluble in acetone.

Die nach der Erfindung hergestellten Farbstoffe sind etwas heller gefärbt als die nicht mit Schwefelsäure behandelten und besitzen dieselben guten Eigenschaften, die sie in hervorragender Weise für die Herstellung von Lichthofschutzschichten geeignet machen. Gegenüber den Farbstoffen, welche gemäß Patent 576 8 i 9 zur Anwendung kommen, besitzen sie noch den Vorteil, daß sie wesentlich beständiger sind, was sich insbesondere in ihrer Unveränderlichkeit auch unter ungünstigen Wittcrungsverhältnissen bemerkbar macht. Die neuen Farbstoffe sind daher auch für den Lichthofschutz von photographischem Material geeignet, das für den Gebrauch im Tropenklima bestimmt ist.The dyes produced according to the invention are somewhat lighter colored than those not treated with sulfuric acid and have the same good ones Properties which make them excellent for the production of antihalation coatings make suitable. Compared to the dyes, which according to patent 576 8 i 9 to use come, they still have the advantage that they are much more stable, what especially in their immutability even under unfavorable weather conditions makes noticeable. The new dyes are therefore also used to protect against halation photographic material intended for use in tropical climates is.

Claims (1)

PATENTANSPRUCH: Verfahren zur Herstellung von Farbstoffen für Lichthofschutz von photographischem Material, dadurch gekennzeichnet, daß die durch Umsetzung von i Mol Furfurol mit 2 Mol i-Oxy-q.-aminobenzol bzw. dessen Derivaten erhältlichen Farbstoffe bei niedriger Temperatur mit Schwefelsäure behandelt werden.PATENT CLAIM: Process for the production of dyes for antihalation protection of photographic material, characterized in that the reaction of 1 mole of furfural with 2 moles of i-oxy-q.-aminobenzene or its derivatives Dyes are treated with sulfuric acid at a low temperature.
DEI40065D 1929-12-07 1929-12-07 Process for the preparation of dyes for antihalation of photographic material Expired DE611219C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI40065D DE611219C (en) 1929-12-07 1929-12-07 Process for the preparation of dyes for antihalation of photographic material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEI40065D DE611219C (en) 1929-12-07 1929-12-07 Process for the preparation of dyes for antihalation of photographic material

Publications (1)

Publication Number Publication Date
DE611219C true DE611219C (en) 1935-03-23

Family

ID=7190210

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI40065D Expired DE611219C (en) 1929-12-07 1929-12-07 Process for the preparation of dyes for antihalation of photographic material

Country Status (1)

Country Link
DE (1) DE611219C (en)

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