Patent GB-325563-A (GB)
Title: Improvements in or relating to the manufacture of materials for use in dyeing and printing
IPC: C09B67/42
Filed: 1928-10-23
Abstract: 325,563. Carpmael, A.., (I. G. Farbenindustrie Akt.-Ges.). Oct. 23, 1928. Phenolic and enolic compounds; dye preparations.-Solid stable products, yielding clear aqueous solutions and specially suitable for use in developing amino azo dyestuffs diazotized on the fibre, are obtained by incorporating alkali starch with compounds containing phenolic or enolic hydroxy groups or alkali salts thereof. The following examples are specified. (1) A mixture of 100 parts by weight of the dry finely divided sodium salt of the 2'-toluidide or the 41-chloro- 2'-toluidide of 2 : 3-oxynaphthoic acid and 3-8 parts of alkali starch yields clear solutions in cold or warm water suitable for direct slop-padding of vegetable fibres. (2) A mixture of 30 parts by weight of the sodium salt of the 4'-anisidide of 2 : 3-oxynaphthoic acid, 70 parts of the diazoamino compound obtained as described in Specification 324,041 from diazotized 4-chloro-2-anisidine and 2-amino-4-sulphobenzoic acid, and 5 parts of alkali starch yields an aqueous solution which remains clear even on standing. (3) A mixture of 100 parts by weight of the anilide of 2 : 3-oxynaphthoic acid and 47 parts of alkali starch vields a clear solution in warm water suitable for direct slop-padding of vegetable fibres. (4) A mixture of 100 parts by weight of acetoacetic anilide and 68 parts of alkali starch yields a clear solution in water at 40-50‹ C.; this solution is suitable for developing the dyestuff 2 : 5-naphthylaminesulphonic acid # 1 : 5 : 7- aminonaphtholsulphonic acid # 2-(4<1>-aminobenzoyl) amino-5-naphthol-7-sulphonic acid (cf Specification 16386/13) after diazotization on the fibre, vivid green shades being thus obtained; a mixture of 1-phenyl-3-methyl-5-pyrazolone and alkali starch is similarly applicable as a developer. (5) A mixture of 100 parts by weight of diacetoacetyltolidine and 64 parts of alkali starch yields in water at 50‹ C. a clear solution in which may be incorporated nitrosamines or diazoamino compounds of the type described in Specification 324,041 with or without filling materials such as sodium chloride or sodium sulphate; thus a mixture obtained by grinding together 15 parts by weight of diacetoacetyltolidine, 10 parts of alkali starch, and 35 parts of the diazoamino compound obtained as described in Specification 324,041 from diazotized 4-chloro-2-toluidine and 2-amino- 4-sulphobenzoic acid yields in warm water a clear solution suitable for the production of fast yellow shades in printing. (6) a mixture of 100 parts by weight of #-naphthol and 92 parts of alkali starch yields an aqueous solution suitable for developing the dyestuff aniline # 2-(3<1>- aminobenzoyl) amino-5-naphthol-7-sulphonic acid (cf Specification 24036/03) after diazotization on the fibre, vivid reddish orange shades being thus obtained. (7) A mixture of 100 parts by weight of sulphaxone or of 2 : 4-dioxyquinoline with 64 parts of alkali starch yields a similar clear aqueous solution and is similarly suitable for developing amino azo dyestuffs diazotized n the fibre.