DE494371C - Process for the preservation of technical and pharmaceutical preparations - Google Patents

Process for the preservation of technical and pharmaceutical preparations

Info

Publication number
DE494371C
DE494371C DEN25242D DEN0025242D DE494371C DE 494371 C DE494371 C DE 494371C DE N25242 D DEN25242 D DE N25242D DE N0025242 D DEN0025242 D DE N0025242D DE 494371 C DE494371 C DE 494371C
Authority
DE
Germany
Prior art keywords
preservation
technical
pharmaceutical preparations
acid
photographic
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
DEN25242D
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.)
NAEHRMITTELFABRIK JULIUS PENNE
Original Assignee
NAEHRMITTELFABRIK JULIUS PENNE
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 NAEHRMITTELFABRIK JULIUS PENNE filed Critical NAEHRMITTELFABRIK JULIUS PENNE
Priority to DEN25242D priority Critical patent/DE494371C/en
Application granted granted Critical
Publication of DE494371C publication Critical patent/DE494371C/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
    • G03C1/37—Antiseptic agents

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • General Physics & Mathematics (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Description

Verfahren zur Konservierung technischer und pharmazeutischer Präparate Zusatz zum Patent 438588 Durch Patent ..138 588 ist ein Verfahren geschützt, Lebens- und Futtermittel mit Hilfe von Alkoholestern carboz_vklischer Säuren zu konservieren. Es wurde nun gefunden, daß diese Ester ganz. im Gegensatz zu den sonst bei der Konservierung von Lebensmitteln angewandten organischen Stoffen, wie z. B. Benzoesäure, Salicylsäure und Formaldehyd, sich auch zur Haltbarmachung photographi->cher Gelatine eignen.Process for the preservation of technical and pharmaceutical preparations Addition to patent 438588 Patent ..138 588 protects a process for preserving food and feed with the help of alcohol esters of carbozic acids. It has now been found that these esters are whole. In contrast to the organic substances otherwise used in the preservation of food, such as B. benzoic acid, salicylic acid and formaldehyde are also suitable for preserving photographic gelatin.

Die zur Konservierung von Lebensmitteln angewandten Benzoesäure und Salicvlsäure sind bei der Konservierung photographischer Gelatine nicht brauchbar, da sie in dieser störende Ausflockungen und Schleier verursachen; das bekannte Konservierungsmittel für Milch, Formaldehyd, ist wegen seiner Reduktionswirkung für photographische Gelatine ebenfalls nicht geeignet. Die Alkoholester der carbozyklischen Säuren haben diese Cbelstände nicht. So wirkt z. B. der Methylester der p-Oxvbenzoesäure weder reduziereiid noch verändert er die Konsistenz der Gelatinegallerte, noch beeinflußt er, was besonders wichtig ist, den Reifungsprozeß des Silberhalogenids. Ferner ist der Ester bei der Bad-Sensibilisierung sowohl mit basischen wie mit sauren Farbstoffen ohne störenden Einfluß.Benzoic acid used to preserve food and Salicvic acid cannot be used in the preservation of photographic gelatin, because they cause disturbing flocculation and haze in this; the well-known preservative for milk, formaldehyde is used for photographic gelatin because of its reducing effect also not suitable. The alcohol esters of the carbocyclic acids have this Cbel stands not. So acts z. B. the methyl ester of p-oxybenzoic acid neither reducing nor does it change the consistency of the gelatin jelly, nor does it influence what is special What is important is the ripening process of the silver halide. Furthermore, the ester is in the Bath sensitization with both basic and acidic dyes without disturbing Influence.

Bisher waren zur Haltbarmachung photographischer Gelatine nur die Phenole Thymol und Carbolsäure anwendbar. Diesen Phenolen sind die Ester der p-Oxybenzoesäure und anderer carbozyklischer Säuren durch ihre Geruchlosigkeit überlegen. Sie übertreffen auch die Carbolsäure an Wirkung erheblich; so konnte ein Zusatz von 2 pro Mille Carbol-, säure photographische Gelatine nicht vor bakterieller Zersetzung schützen, wohl aber unter gleichen Versuchsbedingungen bereits ein Zusatz. von o,6 Promille p-Oxybenzoesäuremethylester oder von 0,2 pro Mille m-Oxybenzoesäur ebenzylester.Until now, only those were used to preserve photographic gelatine Phenols thymol and carbolic acid can be used. These phenols are the esters of p-oxybenzoic acid and other carbocyclic acids because they are odorless. You excel the effect of carbolic acid is also considerable; so could an addition of 2 per mille Do not protect carbolic acid photographic gelatine from bacterial decomposition, but probably already an addition under the same test conditions. of 0.6 per mille methyl p-oxybenzoate or from 0.2 per mille of m-oxybenzoate.

Beispiel Bei der Bereitung der Silberhalogenid-Gallerte wird unter die zur Gallerte zu verarbeitende trockene Gelatine p-Oxybenzoesäuremethvlester in einem solchen Verhältnis gemischt oder in dein zur Bereitung der Gelatinelösung zu benutzenden Wasser vorher in einem solchen Verhältnis gelöst, daß die fertige Silberhalogenidemulsion o,6 pro Mille Ester enthält.Example When preparing the silver halide jelly, under the dry gelatine p-oxybenzoic acid methyl ester to be processed into jelly mixed in such a ratio or in your to prepare the gelatin solution to be used water previously dissolved in such a ratio that the finished Silver halide emulsion contains 0.6 per mille of ester.

Claims (1)

PATrNTANSPRUCH: Ausdehnung des Konserv ierungsverfahrens nach Patent 438 588 mittels der Alkoholester der carbozyklischen Säuren auf die Haltbarmachung photographischer Gelatine-Präparate.PATENT CLAIM: Extension of the preservation process according to the patent 438 588 by means of the alcohol esters of the carbocyclic acids on the preservation photographic gelatin preparations.
DEN25242D 1925-11-17 1925-11-18 Process for the preservation of technical and pharmaceutical preparations Expired DE494371C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEN25242D DE494371C (en) 1925-11-17 1925-11-18 Process for the preservation of technical and pharmaceutical preparations

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEN0025242 1925-11-17
DEN25242D DE494371C (en) 1925-11-17 1925-11-18 Process for the preservation of technical and pharmaceutical preparations

Publications (1)

Publication Number Publication Date
DE494371C true DE494371C (en) 1930-03-21

Family

ID=25988926

Family Applications (1)

Application Number Title Priority Date Filing Date
DEN25242D Expired DE494371C (en) 1925-11-17 1925-11-18 Process for the preservation of technical and pharmaceutical preparations

Country Status (1)

Country Link
DE (1) DE494371C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1057404B (en) * 1956-12-06 1959-05-14 Esslingen Maschf Stuffing box seal, especially for high pressure compressors, with thin-walled packing rings of U-shaped cross-section

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1057404B (en) * 1956-12-06 1959-05-14 Esslingen Maschf Stuffing box seal, especially for high pressure compressors, with thin-walled packing rings of U-shaped cross-section

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