Patent GB-976701-A (GB)
Title: Improvements relating to diamino-triphenodioxazines and their use for pigmenting purposes
IPC: C09B19/02
Filed: 1961-02-17
Abstract: Synthetic polymers, rubber and cellulose compositions are coloured in red-blue to blue shades by incorporating therein finely dispersed diamino-triphenodioxazines of formulae <FORM:0976701/C3/1> <FORM:0976701/C3/2> wherein the nuclei A and B may be substituted by substituents which do not dissociate in neutral water (see Division C4). Specified synthetic polymers include polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyvinylidene chloride, polyvinyl acetate, polyacrylonitrile, polyacrylic or polymethacrylic acid esters, vinyl chloride-vinyl acetate copolymers, acrylonitrile-vinyl chloride copolymers, polybutadiene, styrene-butadiene copolymers; phenol-, melamine-or urea-formaldehyde, dialkyl maleate resins, polyamides, polyurethanes; polyallyl-2,3- epoxypropyl ether, reaction product of 2,2-bis-(4-hydroxy-phenyl)-propane and excess epichlorhydrin. The pigmented products may be finished by spinning, calendering, moulding, extrusion, casting, coating or injection moulding.  The pigments may also be used to colour lacquers and varnishes containing synthetic polymers or cellulose derivatives. In examples: (1) soluble gun cotton containing 35% butanol, a phthalate resin modified with castor oil, a butanolic solution of a urea lacquer resin, butyl acetate, ethylene glycol monoethyl ether, toluene and alcohol are worked up into a lacquer and pigmented with 2,6-diamino-3,7-di-isopropoxy- or -dimethyl- or -diethyl-9, 10-dichloro-triphenodioxazine and titanium dioxide; (2) 2,6- or 3,7-diamino-9, 10-dichloro-triphenodioxazine and titanium dioxide are added to a stoving lacquer consisting of a xylene solution of a coconut oil alkyd resin and a butanol solution of a melamine lacquer resin; (3) polyvinyl chloride powder, dioctyl phthalate, a phosphate stabilizer and 2,6-diamino-3, 7-diethoxy-9, 10- dichloro-triphenodioxazine are mixed by rolling at 160 DEG C. and calendered to give a blue foil; (4) 2,6-diamino-3, 7, 9, 10-tetrachloro-triphenodioxazine, titanium dioxide and polyethylene granulate are mixed and pressed into sheets or extruded; (5) 2,6-diamino-1, 5, 9, 10-tetrachloro-triphenodioxazine and polystyrene granulate are mixed by hot rolling and pressed into sheets; (6) a mixture of rubber latex crepe, barium sulphate, chalk, lithopone, zinc oxide, paraffin, sulphur, vulcanising agent, anti-ageing agent, copper phthalocyanine, and 2,6-diamino-3,7-dimethyl-9, 10-dichloro-triphenodioxazine is mixed on rollers and vulcanized; (9) 2,6-diamino-3,7-dimethyl-9, 10-dichloro- or 2,6-diamino-3,7-dimethyl-9, 10-dichloro- or 2,6-diamino-9, 10-dichloro-or 2, 6-diamino-3, 7, 9, 10-tetrachloro-triphenodioxazine is mixed with polyhexamethylene adipamide under nitrogen and the mass is spun to give flue fibres; (12) a colophonium modified phenol resin is dissolved in bleached linseed oil and the solution mixed with linseed oil-lithographic oil, a paste consisting of linseed oil and a polyethylene wax is added and the whole is mixed with 2,6-diamino-3, 7, 9, 10-tetrachloro-triphenodioxazine and aluminium hydroxide to give a graphic colour.ALSO:Finely dispersed diamino-triphenodioxazines of formulae <FORM:0976701/C4-C5/1> <FORM:0976701/C4-C5/2> wherein the benzene nuclei A and B may be further substituted by substituents which do not dissociate in neutral water are used to pigment organic products (see Divisions B5 and C3) such as printing inks in red-blue to blue shades. The invention also comprises the pigments of formula <FORM:0976701/C4-C5/3> wherein X is a chlorine atom or a methyl group. The diamino-triphenodioxazines are obtained by reducing the corresponding dinitro compounds or by saponification of bis-acylamino-triphenodioxazines. The pigments are brought into a finely dispersed form, preferable particle size is 0.1 to 1.0 microns, by acid pasting or by milling in the presence of additiols. In examples: (1) 2,6 - diamino - 3,7 - dimethoxy- or -diethoxy- or -dimethyl - 9,10 - dichloro - triphenodioxazine, which is prepared by saponifying the corresponding acetylamino or benzoylamino compounds with sulphuric acid and milling in the presence of calcium chloride or sodium sulphate, is milled with aluminium hydroxide, linseed oil varnish and cobalt linoleate to give a graphic colour; (2) the following dioxazines are prepared as in (1) 2,6-diamino-3,7-di-isopropoxy- or -diethoxy- or -dimethyl- or -diethyl-9,10-dichloro-, 2,6 - diamino - 3,7,9,10 - or -1,5,9,10-tetrachloro- and 2,6 - diamino - 3,7 - dibromo- 9,10 - dichloro - triphenodioxazines: (3) 2,6-diamino - 3,7 - dimethylsulphonyl- or -diethylsulphonyl - 9,10 - dichloro - triphenodioxazine, prepared by reducing the corresponding dinitro compound with sodium hyposulphite, is used to prepare a graphic colour as in (1); (4) 2,6- or 3,7 - diamino - 9,10 - dichloro - triphenodioxazine is prepared by reduction as in (3).ALSO:Compositions used in coating surfaces and textiles are coloured in red-blue to blue shades by incorporating therein finely dispersed diamino-triphenodioxazines of formulae: <FORM:0976701/B1-B2/1> <FORM:0976701/B1-B2/2> wherein the nuclei A and B may be substituted by substituents which do not dissociate acid in neutral water (see Division C4). In Examples: (1) a lacquer comprising soluble gun cotton containing butanol, a castor oil modified phthalate resin, a butanol solution of a urea lacquer resin, butyl acetate, ethylene glycol monoethyl ether, toluene and alcohol is pigmented with 2,6-diamino-3,7-di-isopropoxy- or -dimethyl- or -diethyl-9,10-dichloro-tripheno-dioxazine and titanium dioxide and sprayed on to cardboard to give a blue coating; (2) 2,6-diamino-9,10-dichloro-triphenodioxazine and titanium dioxide are added to a stoving lacquer consisting of a xylene solution of a coconut oil alkyd resin and a butanol solution of a melamine-formaldehyde lacquer resin, the mixture milled and the pigmented lacquer sprayed on to a cleaned metal surface and stoved to give a blue colouring; (3) a layer 0,2 mm. thick of a finely milled paste consisting of polyvinyl chloride powder, dioctyl phthalate, dibutyl tin laurate, phosphate stabilizer, chalk, lacquer benzine and a paste of 2,6-diamino-3,7,9,10-tetrachloro- or 2,6-diamino-3,7-dibromo-9,10-dichlorotriphenodioxazine in dioctyl phthalate is applied to a cotton fabric which is heated for 3 minutes at 160  DEG C., the treatment is repeated and a blue synthetic leather is obtained.