Patent GB-439135-A (GB)
Title: Improvements in or relating to the developing of dyeings on the fibre
IPC: C09B44/02
Filed: 1934-09-21
Abstract: Dyeings fast to washing on cellulose fibres are made by coupling thereon a diazonium compound with an azo component characterized in that on the one hand components are used which contain sulpho and/or carboxyl groups and on the other hand components which contain one or more quaternary ammonium groups linked to one or more carbon atoms of the components, so that on forming the azo dyestuff, salts difficulty soluble or insoluble in water are formed, the component first used being of substantive character.  In examples: (1) primuline is diazotized on cotton and developed with p-acetoacetylaminophenyl-trimethylammonium - methosulphate or 1 - (4<1>-trimethylammonium chloride-phenyl)-3-methyl-5-pyrazolone; (2) Diazobrilliant Scarlet BG is diazotized on cotton and developed with 7-oxy-2 - naphthyltrimethylammonium chloride; (3) Diaminogen Blue BB is diazotized on cotton and developed with b -(7-oxy-2 naphthyloxy) ethylmethylpiperidinium methosulphate; (4) cotton is dyed with benzidine \sQ 1-naphthylamine-6-sulpho acid, diazotized and developed with the product obtained by reducing 2<1> : 4<1>-dinitrophenyl - pyridinium chloride, or with the developers of (1); (5)--(7) cotton is dyed with g -acid \sM benzidine --> 1-naphthylamine-6-sulphonic acid, Diamine Black BH or RO, diazotized and developed with (a) the developer of (4), (b) the first developer in (1), (c) m-phenylenediamine (for comparison); (8) cotton is impregnated with m<1>-cinnamoylaminobenzoyl-J-acid (obtained by condensing cinnamoyl chloride with m-aminobenzoyl-J-acid) and developed with diazotized (a) m-aminophenyltrimethylammonium chloride, (b) (p-aminobenzyl -) methylpiperidinium - methosulphate, (c) p<1> - aminobenzoyl - m - aminophenyl - trimethyl - ammonium chloride, (d) 8-amino-2-naphthyltrimethylammonium methosulphate, (e) p-nitraniline (for comparison); 3-nitro - 4 - aminophenyl - trimethylammoniummethosulphate and m<1> p  - aminobenzoylphenyltrimethylammonium - chloride may also be used; (9)--(11) p<1> - aminobenzoyl - J - acid urea, benzidine \sQ J-acid and H-acid \sM benzidine --> m-phenylene diamine on cotton are developed as in (8); (12) cotton is dyed with benzidine \sQ 1 : 8 : 4-acid and developed with diazotized m-aminophenyltrimethylammonium chloride; (13)--(14) cotton is dyed with the dyestuff benzidine \sQ 8-amino-2-naphthyltrimethylammonium methosulphate or the dyestuff p<1> - aminobenzoyl - m - aminophenyltrimethylammonium chloride --> 8-amino-2-naphthyltrimethylammonium chloride --> a -naphthylamine, diazotized and developed with (a) 2 : 4-diaminobenzene sulphonic acid, (b) 1-naphthol-4-sulphonic acid, (c) and (d) 2-naphthol-6-sulphonic or 3 : 6-disulphonic acid, (e) J-acid, (f) g -acid, (g) H-acid and for comparison (h) m-phenylenediamine and (i) b -naphthol; the dyeings with (b), (e) and (f) may be after-chromed or coppered; (15) cotton is dyed with the disazo dye 8-amino-7-oxy-2-napthyltrimethylammonium chloride --> a -naphthylamine --> 8 - amino - 2 - naphthyltrimethylammonium chloride, diazotized in a bath containing sodium chloride and developed with naphthol sulphonic acids such as Schaffer or R-salt; (16) cotton is dyed with the dyestuff p<11>-aminobenzoyl-p<1>-aminobenzoyl-m-amino phenyltrimethylammonium chloride --> 8-amino-2-naphthyltrimethylammonium chloride, diazotized and developed with R-salt, H-acid, cinnamoyl H-acid (cf. Specification 418,295), p-nitraniline --> (acid) H-acid and b -naphthol; (17)--(18) cotton is dyed with the azo dye safranine T --> m-toluidine or a -naphthylamine, diazotized and developed with 2-naphthol-6-sulpho acid, J-acid, g -acid, 2<1> : 3<1>-oxynaphthoyl-metanilic acid and b -naphthol (for comparison); unsymmetrically dialkylated safranines can be used as diazo components; (19) cotton is dyed with the dyestuff p<1>-aminobenzoyl - m - aminophenyltrimethylammonium chloride --> 8-amino-2-naphthyltrimethylammonium chloride --> m-phenylenediamine and developed with diazotized metanilic acid or 2-naphthylamine-6 : 8-disulphonic acid; (20) cotton is dyed with the azo dyestuff Safranine T --> resorcinol and developed with diazotized sulphanilic acid, Cleve's acid and p-nitraniline (for comparison). Specifications 9472/14, [Class 2 (iii)], and 418,295 are referred to. The Specification as open to inspection under Sect. 91 states that the impregnating dyestuffs need not necessarily be azo dyes.  In example (19) above sulphanilic acid is specified instead of metanilic acid.  This subject-matter does not appear in the Specification as accepted.