Patent GB-636761-A (GB)
Title: Diazotype layers containing resorcinol mono-ethers
IPC: F16L9/18
Filed: 1947-07-21
Abstract: 636,761. Photographic diazotype process. GENERAL ANILINE & FILM CORPORATION. July 21, 1947, No. 19537. Convention date, Aug. 7, 1946. [Class 98 (ii)] An azo-coupling component for incorporation in the sensitizing solution or in an alkaline developing solution is a resorcinol mono-ether of the formula wherein R is an alkyl, cycloalkyl, aryl, or aralkyl group, including such groups substituted by halogen atoms or hydroxy, alkoxy, carboxy, carbalkoxy, sulpho, or amino groups, and X is H or alkyl, halogen, carboxy, alkoxy, hydroxyalkyl, aryl, alkaryl, aralkyl, carbalkoxy, carbamido, or the group -CH-NYY, wherein the Y's, which are the same or different, are H, alkyl, hydroxyalkyl, aryl, alkaryl, aralkyl, or cycloalkyl, or may be joined to complete a heterocyclic ring. Couplers specified are resorcinol mono-ethyl ether, mono-acetic acid, mono-#-sulphoethyl ether, mono-#-hydroxyethyl ether, mono - (4<SP>1</SP> - sulphophenyl) - ether, mono-aminoethyl ether ; morpholinomethylresorcinol mono-methyl ether ; N-diethylaminomethylresorcinol monomethyl ether. Numerous diazo compounds are specified, including the diazo anhydrides of aminohydroxynaphthalene compounds and diazotized p-amino- N - ethyl - N - 21 : 6<SP>1</SP> - dichlorobenzylaniline, 1 - (21 : 6<SP>1</SP> - dichlorobenzyl) - 2 - phenoxy - 4- aminobenzene, 1 - N - ethyl : N - propylamino- 2 - ethoxy - 4 - aminobenzene, p - morpholinoaniline, 4 - chloro - 6 - hydroxyaniline - 2- sulphonic acid, and 2-amino-1-hydroxynaphthalene-5-sulphonic acid. In examples, paper which has been rendered transparent is sensitized with an aqueous solution containing citric acid, phosphoric acid, thiourea, isopropanol, and (a) resorcinol mono-ethyl ether and the zinc chloride double salt of diazotized 4 - ethylamino - 3 - methylaniline ; (b) resorcinol mono-acetic acid and the zinc chloride double salt of diazotized p (N - ethyl : N- hydroxyethyl)-aminoaniline or the cadmium chloride double salt of diazotized N-ethylaminoaniline ; (c) resorcinol mono-#-sulphoethyl ether and 2-amino-1-hydroxy-5-naphthalenesulphonic acid diazoanhydride ; (d) N-diethylaminomethylresorcinol mono-methyl ether and 2 : 5 : 4<SP>1</SP> - triethoxydiphenyl - 1 - diazonium acid sulphate ; (e) resorcinol mono-(4<SP>1</SP>-sulphophenyl)-ether and the zinc chloride double salt of N - ethyl : N - hydroxyet:hyl,- m - toluidinep-diazonium chloride ; and (f) resorcinol monohydroxyethyl ether or resorcinol mono-#- aminoethyl ether and the zinc chloride double salt of diazotized 4-ethylamino-3-methylaniline. In further examples, paper is coated with an aqueous solution of isopropanol, ethylene glycol, citric acid, boric acid, zinc chloride, saponin, and the zinc chloride double salt of diazotized 4 - (N - methyl : N - # - hydroxyethylamino) - aniline, and (g) morpholinomethylresorcinol mono-methyl ether, or (h) N - diethylaminomethylresorcinol mono - ethyl ether and thiourea, or (i) resorcinol #-sodium sulphoethyl ether and thiourea. The material may be used for the production of intermediate prints to be used for the production of further diazotype prints. The Specification as open to inspection under Sect. 91 refers also to the use as couplers of the N-diethylaminoethyl ester of resorcinol carboxymethyl ether, the methyl ester of the carboxymethyl ether of N-dimethylaminomethylresorcinol, and the carboxymethyl ether of bromoresorcinol. This subject-matter does not appear in the Specification as accepted.