Patent GB-650046-A (GB)
Title: Diazotype photoprinting materials of the two component class containing as azo-coupling components acylated aminonaphthols
IPC: G03C1/58
Filed: 1947-10-13
Abstract: 650,046. Photographic diazotype process. GENERAL ANILINE & FILM CORPORATION. Oct. 13, 1947, No. 27433. Convention date, Oct. 24, 1946. [Class 98 (ii)] An azo-coupling component for incorporation in a diazotype sensitizing solution or in an alkaline developing solution for diazotype material is an aminonaphthol of the general formula wherein R 1  is H, alkyl, or hydroxyalkyl, X is -CO- or -SO 2 -, R 2  is an aliphatic, aromatic, heterocyclic, amino, or alkylamino group, and Y is a -O-SO 3 H, -SO 3 H, -NH 2 .HCl, -N(CH 3 ) 2 .HCl, -NHCH 3 .HCl, -NHC 2 H 5 .HCl or -N(C 2 H 5 ) 2 .HCl group, and wherein the aromatic nuclei may be substituted by groups not affecting coupling characteristics. Numerous aminonaphthols are specified. The diazo compound may be derived from a p-phenylenediamine, and may be in the form of a double salt. The support may be of opaque or transparentized paper, regenerated cellulose, cellulose derivative, linen, cotton, rayon, glass, or metal. The sensitizing solution may contain isopropanol. In example 1, paper is impregnated with an aqueous solution of the zinc chloride double salt of N-diethylamino-pbenzenediazonium chloride, 1-(N-3<SP>1</SP>-aminobenzoyl) - amino - 7 - naphthol hydrochloride, citric acid, and thiourea. 1 - (N - 41 - aminobenzoyl) - amino - 7 - naphthol may be used as the coupling component. In example (2), the procedure is similar, using the zinc chloride double salt of 2: 5-diethoxy-4-benzoylaminobenzenediazonium chloride. In example (3) the procedure is similar, using transparentized paper and the zinc chloride double salt of 1 - (N - ethylamino) - 2 - methyl - 4 - benzenediazonium chloride. Example 4 employs 1-(N- phenyl) - 4 - benzenediazonium acid sulphate and 2 - (N - 4<SP>1</SP> - aminobenzoyl) - amino - 7 - naphthol hydrochloride; example (5) the zinc chloride double salt of N-methyl: N-#-hyclroxyethylamino - p - - benzenediazoniwn chloride or N-diethylamino-p-benzenediazonium chloride; example (6) the zinc chloride double salt of N - ethyl : N-#-hydroxyethylamino-p-benzene diazonium chloride and 2-(N-41-aminobenzoyl)- amino-5-naphthol hydrochloride; example (7) the zinc chloride double salt of N-diethylaminop - benzenediazonium chloride and 1 - (N - 3<SP>1</SP> - aminobenzoyl) - amino - 4 - naphthol hydrochloride or 1 - (N - 4<SP>1</SP> - aminobenzoyl) - amino - 4-naphthol hydrochloride; example (8) the zinc chloride double salt of N-diethylamino-pbenzenediazonium chloride and N-(3<SP>1</SP>-aminobenzoyl)-H-acid or N-(4<SP>1</SP>-aminobenzoyl)-H-acid; and example (9) the zinc chloride double salt of N - methyl : N - # - hydroxyethylamino - p - benzenediazonium chloride and 1-(N-3<SP>1</SP>-aminobenzoyl) - amino - 2 - naphthol - 4 - sulphonic acid or 1 - (N - 4<SP>1</SP> - aminobenzoyl) - amino - 2 - naphthol-4-sulphonic acid. The Specification as open to inspection under Sect. 91 refers also to the use of 1-(N-41-aminobenzoyl) - amino - 5 - naphthol hydrochloride. This subject-matter does not appear in the Specification as accepted.