PL8805B1 - Method of obtaining desensitizing bodies. - Google Patents

Method of obtaining desensitizing bodies. Download PDF

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Publication number
PL8805B1
PL8805B1 PL8805A PL880526A PL8805B1 PL 8805 B1 PL8805 B1 PL 8805B1 PL 8805 A PL8805 A PL 8805A PL 880526 A PL880526 A PL 880526A PL 8805 B1 PL8805 B1 PL 8805B1
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Poland
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bodies
desensitizing
obtaining
properties
parts
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PL8805A
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Polish (pl)
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Publication of PL8805B1 publication Critical patent/PL8805B1/en

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W patencie niemieckim Nr 396 402 opi¬ sano sposób otrzymywania cial odczula¬ jacych emulsje bromku srebrowego lub klisze fotograficzne nia pokryte. Ciala te o- trzymuje sie zapomoca kondensacji mety- lo-pirydyny lub zasad chinolinowych z al¬ dehydami o charakterze ujemnym. Ciala rzeczone nie odpowiadaly jednak wymaga¬ niom praktyki fotograficznej, gdyz byly trudno rozpuszczalne, jak równiez nie po¬ siadaly w stopniu dostatecznym wlasnosci odczulajacej.Obecnie wykryto, ze wskutek wspól¬ dzialania scisle okreslonych grup, jak rów¬ niez wskutek okreslonego polozenia tych o- statnich w zespole czasteczkowym, otrzy¬ muje sie ciala odczulajace, które sa praktycznie dostatecznie rozpuszczalne, jak równiez wykazuja wlasnosci odczu¬ lajace w stopniu odpowiadajacym wy¬ sokim wymaganiom. Ciala podobne o- trzymuje sie zapomoca kondensacji siarczanu alkylowego p-alkyloksychinal- dyny z m-nitrobenzaldehydem Glówne ich znamie polega na tern, ze, maj^c w pierscieniu bsnzenowym nitrogrupe w po¬ lozeniu meta, posiadaja jednoczesnie w ze¬ spole chinolinowym grupe oksyalkylowa w polozeniu para i kwas alkylosiarkowy, mogacy dawac sole, Ciala te, posiadajac dostateczna rozpuszczalnosc a jednoczesnie wykazujac wlasnosci odczulajace w wy¬ sokim stopniu, nadspodziewanie odpo¬ wiadaja wymaganiom, stawianym przy sto-sowaniu ich w praktyce. Poniewaz ponad¬ to dotychczas stosowane w praktyce ciala odczulajace sa barwnikami lub maja wy¬ raznie zaznaczone wlasnosci barwiace, pod¬ czas gdy produkty otrzymywane w mysl wynalazku nie sa barwnikami w wlasci- wem slowa tego znaczeniu, lecz sa tylko slabo zabarwione na kolor zólty, dajac roztwory bedace w uzyciu prawie bezbarw¬ ne, wobec czego stosowanie zwiazków rze¬ czonych dd odczulania klisz fotograficz¬ nych, szczególnie klisz barwnych, w prze¬ ciwienstwie do dotychczas znanych roz¬ tworów barwiacych, stanowi znaczny po¬ step.Przyklad. 2,348 czesci wagowych me- tylosiarczanu p-etoksychinaldyny i 1,132 cz. wag. m-nitrobenzaldehydu rozpuszcza sie w 3 cz. wag. alkoholu i gotuje po do¬ daniu 0,225 cz. wag. kopelidyny, w ciagu kilku godzin pod chlodnica zwrot¬ na. Produkt wykrystalizowany po ostu¬ dzeniu staje sie czysty natychmiast po przemyciu acetonem. Rozpuszcza sie on dostatecznie latwo w wodzie i posiada wlasnosci odczulajace.Zastr.zezenie, j atentowc Sposób otrzymywania cial odczulaja¬ cych, znamienny tern, ze alkylosiarczan p-chinaldyny kondensuje sie z m-nitroben- zaldehydem.I. G. F ar b en indust r i e Aktiengesellschaft.Zastepca: M. Skrzypkowski, rzecznik patentowy.Druk L. Boguslawskiego, Warszawa. PLGerman Patent No. 396,402 describes a method of obtaining desensitizing bodies with silver bromide emulsions or coated photographic plates. These bodies are preserved by the condensation of methyl-pyridine or quinoline bases with negative aldehydes. These bodies, however, did not meet the requirements of photographic practice, because they were sparingly soluble and did not possess sufficient desensitizing properties. At present it has been discovered that due to the interaction of precisely defined groups, as well as due to the specific position of these objects, In the molecular complex, desensitization bodies are obtained which are practically sufficiently soluble and also exhibit sensing properties to a degree corresponding to high demands. Similar bodies are obtained by condensation of p-alkyloxychinaldine alkyl sulphate with m-nitrobenzaldehyde. Their main characteristic is that, having a nitrogrup in the meta position in the bsnzen ring, they also have an oxyalkyl group in the quinoline In the presence of steam and alkylsulfuric acid that can give salts, these bodies, having sufficient solubility and at the same time showing high desensitizing properties, unexpectedly meet the requirements for their application in practice. Since, moreover, the desensitizing bodies used in practice hitherto are dyes or have clearly marked coloring properties, while the products obtained in accordance with the invention are not dyes in the true sense of the word, but are only slightly tinted yellow, giving solutions which are almost colorless in use, so that the use of tannins for desensitizing photographic plates, especially color plates, unlike the color solutions known hitherto, is a considerable step. 2.348 parts by weight of p-ethoxyquinindine methyl sulfate and 1.132 parts by weight of wt. m-nitrobenzaldehyde is dissolved in 3 parts wt. alcohol and cook after adding 0.225 parts of wt. copelidine, within a few hours under a reflux condenser. The product which crystallizes out on cooling becomes pure immediately after washing with acetone. It dissolves easily enough in water and has desensitizing properties. Zastr.zezenie, j atentowc A method of obtaining desensitizing bodies, characterized by the fact that p-quinaldine alkyl sulfate condenses with m-nitroben-zaldehyde. G. F ar b en indust r i e Aktiengesellschaft. Deputy: M. Skrzypkowski, patent attorney. Printing by L. Boguslawski, Warsaw. PL

PL8805A 1926-12-09 Method of obtaining desensitizing bodies. PL8805B1 (en)

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PL8805B1 true PL8805B1 (en) 1928-05-31

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