Patent GB-193866-A (GB)
Title: Manufacture of azo-dyestuffs
IPC: C09B29/20
Filed: 1923-02-24
Abstract: Azo dyes are obtained, either in substance or on the fibre, by coupling diazo compounds with a p-toluidide or a p-alkyloxyanilide of 2 : 3-oxynaphthoic acid, in which the arylido group contains halogen as substituent.  The shades obtained on the fibre are fast to kier-boiling, especially those derived from halogenated diazo components, particularly halogenated toluidines or halogenated alkyloxy-amino compounds.  Examples are given of printing pastes, and of padding and dyeing solutions, containing as diazo components 2-anisidine, 4-chlor-2-anisidine, 4-chlor-3-anisidine, 4-chlor-2-toluidine, and 4-chlor-3-toluidine, and as second components the following 2 : 3-oxynaphthoic arylides: -chlortoluidide (NH : Cl : CH3 = 1 : 2 : 4), chloranisidide (NH : Cl : OCH3 = 1 : 3 : 4), chlorphenetidide (NH : Cl : OC2H5 = 1 : 2 : 4).  Specification 201,712 is referred to.  The Specification as open to inspection under Sect. 91 (3) (a) refers also to the use of halogenated p-aryloxyanilides and p-aralkyloxyanilides of 2 : 3-oxynaphthoic acid as coupling components, and to the use of aryloxy- and aralkyloxyamino compounds as diazo components; it also contains examples of printing pastes, and of padding and dyeing solutions, containing as diazo components 5-chlor-2-toluidine, 4-chlor-3-toluidine, and 4-nitro- or 4-chlor-2-anisidine, and as second components the following 2 : 3-oxynaphthoic arylides:- o-anisidide, 5-chlor-o-anisidide, (NH : OCH3 : Cl = 1 : 2 : 5), 5-brom-o-anisidide.  This subject-matter does not appear in the Specification as accepted.  Reference has been directed by the Comptroller to Specifications 6379/12 and 23732/13.ALSO:Fibres are dyed by coupling thereon diazo compounds with a p-toluidide or a p-alkyloxyanilide of 2 : 3-oxynaphthoic acid, in which the arylido group contains halogen as substituent.  The shades obtained are fast to kier-boiling, especially those derived from halogenated diazo components, particularly halogen-substituted toluidines or halogen-substituted alkyloxy-amino-compounds.  Examples are given of printing pastes, and padding and dyeing solutions containing as diazo components 2-anisidine, 4-chlor-2-anisidine, 4-chlor-3-anisidine, 4-chlor-2-toluidine, and 4-chlor-3-toluidine, and as second components the following 2 : 3-oxynaphthoic arylides:-chlor-toluidide (NH : Cl : CH3= 1 : 2 : 4), chloranisidide (NH : Cl : OCH3=1 : 2 : 4), chlorphenetidide (NH : Cl : OC2H5=1 : 2 : 4).  Specification 201,712 is referred to.  The Specification as open to inspection under Sect. 91 (3) (a) refers also to the use of halogenated p-aryloxyanilides and p-aralkyloxyanilides of 2 : 3-oxynaphthoic acid as coupling components and to the use of aryloxy- and aralkyloxy-amino compounds as diazo components; it also contains examples of printing, padding, and dyeing solutions containing as diazo components 5-chlor-2-toluidine, 4-chlor- or 4-nitro-2-anisidine, 4-chlor-3-toluidine, and as second components the following 2 : 3-oxynaphthoic arylides:-o-anisidide, 5-chlor-o-anisidide (NH : OCH3 : Cl=1 : 2 : 5), 5-brom-o-anisidide. This subject-matter does not appear in the Specification as accepted. Reference has been directed by the Comptroller to Specifications 6379/12 and 23732/13, [both in Class 2 (iii), Dyes &c.].