Patent GB-740611-A (GB)
Title: Process for producing coloured layers of polyvinyl materials
IPC: D06P1/12
Filed: 1951-06-21
Abstract: Coloured coatings are produced from aqueous dispersions of polyvinyl compounds such as polymers and copolymers of vinyl chloride, acetate, alcohol, and acetal, by forming waterinsoluble or sparingly soluble azo-dyestuffs from their components in the coating layers.  The azo-compound may be in the aqueous dispersion and a solution of the diazo-component applied to a dried layer, or alternatively an aqueous alkaline solution containing an azocomponent and a stabilized diazo-component is applied to the dried layer and the azo-dyestuff developed by exposure to light, heat or by treatment with a dilute acid or by a combination of these methods.  Pattern effects may be obtained by local application, e.g. by brush, roller, or with the aid of a stencil, of the diazo component or the mixed components, which may be thickened, if desired, by agents such as a starch-tragacanth mixture.  The dispersions may also contain dispersing agents such as the reaction product of ethylene oxide and sperm oil alcohol, and fillers such as finely ground heavy spar, slate, basalt, talc, or iron oxide.  Lists of dyestuff components which may be used are given and in examples an aqueous dispersion of polyvinyl acetate with (1) an ethylene oxidesperm oil alcohol dispersing agent is mixed with the dry sodium salt of 2:3-oxynaphthoic acid anilide and ground heavy spar and a solution of a diazonium chloride solution prepared from 1-amino-2:5-dichlorobenzene neutralized with sodium acetate is applied to the dried layer to produce a scarlet pattern on drying, and if a solution prepared from 1-amino-4-benzylamino2:5-diethoxybenzene is applied also a red and blue pattern may be obtained; (2) heavy spar and a 6 per cent solution of 2:3-oxynaphthoic acid made weakly alkaline with sodium carbonate, or of 2-oxy-naphthalene and a solution of 1 - amino - 2 - methoxy - 4 - nitrobenzene and 4 - amino - 2,5 - dimethoxy - 41 - nitroazobenzene are applied side-by-side to the dried layer to give a red and black pattern; (3) pale stone meal and a rapid fast colour containing 2-methoxy-5-chlorobenzene-1-anti-diazotate and 1-(21:31-oxynaphthoyl)-amino-3-nitrobenzene is applied to a dried floor covering, which gives a bluish-red colur; (4) as in (3), using the triazene from diazotized 1-amino-2-methoxy-5-chlorobenzene and sarcosine, which is developed by a dilute thickened solution of formic and acetic acid, or if sodium 2-methoxy-5-chlorobenzene-1-antidiazo sulphonate is used daylight or a quartz lamp is used to irradiate and develop the colour.ALSO:Coloured coatings are produced from aqueous dispersions of polyvinyl compounds such as polymers and copolymers of vinyl chloride, acetate, alcohol, and acetal, by forming water-insoluble or sparingly soluble azo-dyestuffs from their components in the coating layers.  The azocompound may be in the aqueous dispersion and a solution of the diazo-component applied to a dried layer, or alternatively an aqueous alkaline solution containing an azo-component and a stabilised diazo-component is applied to the dried layer and the azo-dyestuff developed by exposure to light, heat or by treatment with a dilute acid or by a combination of these methods.  The diazo-component or the mixed components may be thickened, if desired, by agents such as a starch - tragacanth mixture, and the dispersions may contain dispensing agents such as the reaction product of ethylene oxide and sperm oil alcohol, and fillers such as finely ground heavy spar, slate, basalt, talc or iron oxide.  Azo-components may be aromatic compounds capable of coupling, amides of B-keto-carboxylic acids or pyrazolones, e.g. oxybenzene, oxynaphthalene, oxycarbazole, oxyanthracene, and their sulphonic and carboxylic acids, 2-oxynaphthalene-3-carboxylic acid anilide and oxybenzcarbazole - carboxyl - (11 - amino - 41 - methoxy benzene), 1-benzoylamino-7-oxynaphthalene and 1-oxynaphthalene-5-sulphonyl-N-methyl - cyclohexylamine, 1 - acetoacetylamino-2-methoxy-benzene, 4: 41-bis-acetoacetylamino-3: 31-dimethyl-diphenyl and 1-phenyl-3-methyl-5-pyrazolone.  Diazo compounds may be sodium 2.5-dichlorbenzene 1-anti-diazotate and sodium 2-methoxy-5-chlorobenzene anti - diazotate - sulphonate and the diazoamino compounds of diazotized 1-amino-2-methyl-4-chlorobenzene and methylamino acetic acid.  In examples (1) a diazonium chloride solution prepared from 1-amino-2 : 5-dichorobenzene neutralized with sodium acetate and thickened with a neutral starch-tragacanth or side by side with 1-amino-4-benzoylamino-2 : 5-diethoxybenzene is applied to a dried film of polyvinyl acetate containing the sodium salt of 2:3-oxynaphthoic acid anilide and ground heavy spar (2) diazo solutions of 1-amino-2-methoxy-4-nitrobenzene and 4-amino-2:5-dimethoxy-41-nitrobenzene are applied side by side to a similar film containing 2:3-oxynaphthoic acid made weakly alkaline with sodium carbonate, or 1-oxynaphthalene, (3) a rapid fast colour containing 2-methoxy-5-chlorobenzene-1-antidiazotate and 1 - (21:31 - oxynaphthoyl) - amino-3-nitrobenzene is applied to a polyvinyl acetate layer containing stone meal, and (4) a triazene from diazotised 1-amino-2-methoxy-5-chlorobenzene and sarcosine is applied to a similar layer and the dried layer treated with a diluted and thickened mixture of acetic and formic acid, or alternatively sodium 2-methoxy-5-chlorobenzene-1-antidiazosulphonate is used and the dye is developed by irradiation by light of short wave-length from daylight or quartz lamp.