DE709301C - Process for sensitizing halide silver emulsions - Google Patents

Process for sensitizing halide silver emulsions

Info

Publication number
DE709301C
DE709301C DEI52752D DEI0052752D DE709301C DE 709301 C DE709301 C DE 709301C DE I52752 D DEI52752 D DE I52752D DE I0052752 D DEI0052752 D DE I0052752D DE 709301 C DE709301 C DE 709301C
Authority
DE
Germany
Prior art keywords
sensitizing
sensitization
silver emulsions
emulsions
halide silver
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
DEI52752D
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 DEI52752D priority Critical patent/DE709301C/en
Application granted granted Critical
Publication of DE709301C publication Critical patent/DE709301C/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • G03C1/005—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein
    • G03C1/06—Silver halide emulsions; Preparation thereof; Physical treatment thereof; Incorporation of additives therein with non-macromolecular additives
    • G03C1/08—Sensitivity-increasing substances
    • G03C1/10—Organic substances
    • G03C1/12—Methine and polymethine dyes
    • G03C1/14—Methine and polymethine dyes with an odd number of CH groups
    • G03C1/18—Methine and polymethine dyes with an odd number of CH groups with three CH groups

Description

Verfahren zur Sensibilisierung von Halogensilberemulsionen Es wurde bereits vorgeschlagen, Halogensilberemulsionen mit dem einfachen Benzoxocarbocyanin zu sensibilisieren. Die sensibilisierende Wirkung dieses Farbstoffes für Gelbgrün ist jedoch gering, da sein Sensibilisierungsmaximum im blaugrünen Gebiet des Spektrums liegt und die Steigerung der Allgemeinempfindlichkeit nur gering ist.Method for sensitizing halogen silver emulsions It has been already proposed halogen silver emulsions with the simple benzoxocarbocyanine to raise awareness. The sensitizing effect of this dye for yellow-green however, it is low because its sensitization maximum is in the blue-green region of the spectrum and the increase in general sensitivity is only slight.

Es wurde nun gefunden, däB die Oxocarbocyanine, die in den Benzolringen durch Oxalkylgruppen und am mittelständigen Kohlenstoffatom der Polymethinkette durch Alkylgruppen substituiert sind, praktisch vorzüglich brauchbare orthochromatische Sensibilisatoren sind. Die Substitution in den Benzolringen erfolgt an einer oder mehreren Stellen. Die substituierten Farbstoffe zeigen gegenüber dem einfachen Benzoxocarbocyanin eine Verschiebung des Sensibilisierungsmaximums . in das langwellige Gebiet des Spektrums. Weiterhin zeichnen sie sich durch höhere Intensität der Sensibilisierung aus.It has now been found that the oxocarbocyanines in the benzene rings by oxyalkyl groups and on the central carbon atom of the polymethine chain are substituted by alkyl groups, practically excellently useful orthochromatic Are sensitizers. The substitution in the benzene rings takes place on an or several places. The substituted dyes show against the simple benzoxocarbocyanine a shift in the maximum of sensitization. in the long-wave area of the Spectrum. Furthermore, they are characterized by a higher intensity of sensitization the end.

Die Farbstoffe werden nach bekannten Methoden durch Kondensation der quartären Salze der entsprechenden Benzoxazole mit einer reaktionsfähigen Methylgruppe mit Trialkylorthocarbonsäureestern oder den wasserfreien Salzen der organischen Säuren oder nach dem Verfahren des Patents 637 113 hergestellt.The dyes are prepared according to known methods by condensation of the quaternary salts of the corresponding benzoxazoles with a reactive methyl group with trialkylorthocarboxylic acid esters or the anhydrous salts of organic acids or according to the method of patent 637 11 3 .

Die Verarbeitung der Emulsionen geschieht in bekannter Weise. Die Sensibilisatoren können entweder während der Emulsionskierstellung zugesetzt oder der Emulsionsschicht im Badeverfahren einverleibt werden. Beispiel z r, r'-Dimethyl-5, 5'-dimethoxymesoäthylbenzoxocarbocyaninbromid von der wahrscheinlichen Formel wird erhalten durch Kondensation von 2-Methyl-5-methoxybenzoxazol:dimethylsulfat Sensibilisierungsmaximum 555o AE Sensibilisierungsbereich . . 515o bis 6o5o AE Absorptionsmaximum . . . 5 r: o AE. mit Orthopropionsäureester und nachträgliche Umsetzung mit Natriumbromid. Beispiel a i, i'-Dimethyl-5, 5'-diinetlioxymesoinethylbenzoxocarbocyaninjodid Sensibilisierungsmaxiiiium 535o AE Sensibilisierungsbereich .. 5ioo bis 6zoo AE. Beispiel 3 i, i'-Dirnethyl-6, 6'-dimetlioxymesomethyllienzoxocarl>ocyaninjodid Sensibilisierungsmaximum 54oo AE Sensibilisierungsbereich . . 5000 bis 58oo AE. Beispiel .f i, i'-Dimetliyl-6, 0i -dimethoxvinesoäthvll>enzoxocarliocvaninjodid Sensibilisierungsmaxiinum 565o AE Sensibilisierungsbereich .. 5ioo bis 59oo AE.The emulsions are processed in a known manner. The sensitizers can either be added during the preparation of the emulsion or incorporated into the emulsion layer in the bathing process. Example zr, r'-dimethyl-5,5'-dimethoxymesoäthylbenzoxocarbocyaninbromid of the probable formula is obtained by condensation of 2-methyl-5-methoxybenzoxazole: dimethyl sulfate Sensitization maximum 555o AE Sensitization range. . 515o to 6o5o AU absorption maximum. . . 5 r: o AE. with orthopropionic acid ester and subsequent conversion with sodium bromide. Example ai, i'-dimethyl-5,5'-diinetlioxymesoinethylbenzoxocarbocyanin iodide Sensitization maximum 535o AU Awareness area .. 5ioo to 6zoo AU. Example 3 i, i'-dirnethyl-6, 6'-dimetlioxymesomethyllienooxocarl> ocyanine iodide Sensitization maximum 54oo AU Awareness area. . 5000 to 58oo AU. Example .f i, i'-dimethyl-6, 0i -dimethoxvinesoäthvll> enzoxocarliocvaninjodid Sensitization maximum 565o AU. Sensitization range .. 5ioo to 59oo AU.

Claims (1)

PATEN TANSPRUCII Verfahren zur Sensibilisierung von Halogensilbereniulsionen mittels Oxocarboeyaninen, gekennzeichnet durch die Verwendung von Oxocarbocyansnen, die in den Benzolringen durch Oxalkylgruppen und am mittelständigen Kohlenstoffatom der Polymethinkette durch Alkylgruppen substituiert sind.PATEN TANSPRUCII Process for sensitizing halosilver emulsions by means of Oxocarboeyaninen, characterized by the use of Oxocarbocyansnen, those in the benzene rings by oxyalkyl groups and on the central carbon atom of the polymethine chain are substituted by alkyl groups.
DEI52752D 1932-12-17 1932-12-18 Process for sensitizing halide silver emulsions Expired DE709301C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEI52752D DE709301C (en) 1932-12-17 1932-12-18 Process for sensitizing halide silver emulsions

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE430357X 1932-12-17
DEI52752D DE709301C (en) 1932-12-17 1932-12-18 Process for sensitizing halide silver emulsions

Publications (1)

Publication Number Publication Date
DE709301C true DE709301C (en) 1941-08-13

Family

ID=25922859

Family Applications (1)

Application Number Title Priority Date Filing Date
DEI52752D Expired DE709301C (en) 1932-12-17 1932-12-18 Process for sensitizing halide silver emulsions

Country Status (1)

Country Link
DE (1) DE709301C (en)

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