Patent GB-560049-A (GB)
Title: Improvements in or relating to printing of textile fabrics
IPC: D06P1/44
Filed: 1940-12-05
Abstract: A textile printing paste containing not more than about 20 per cent by weight of solids comprises a water-insoluble coloured pigment dispersed in an emulsion of the water-in-oil type of which the outer phase is a solution of a water-insoluble cellulose ether in a volatile water-immiscible organic solvent, the solids content derived from the emulsion constituting not more than about 10 per cent by weight of the paste.  The pigments may be inorganic or organic, including dyestuffs insoluble in water and in glyceride oils, lakes and water-insoluble azo dyes.  Specified pigments are Vulcan green BA extra, Blue lake, Green lake, CP Chrome yellow LM, Monastral green toner pulp, CP Chrome green and Ponsol golden orange G.  Specified cellulose ethers are the ethyl, propyl, butyl, benzyl, mixed ethylbenzyl and mixed ethyl-butyl ethers. Specified water-immiscible organic solvents are toluene, xylene, naphtha, various petroleum hydrocarbons, butanol and pine oil.  A plasticiser and/or a synthetic resin may be incorporated with the cellulose ether.  Specified plasticisers are hydrogenated methyl or ethyl abietate, tributyl or triphenyl phosphate, and methyl or ethyl phthalylethyl glycollate and specified synthetic resins are rosin-modified alkyd resins, e.g. rosin-modified or hydrogenated rosin-modified terpene-maleic anhydride resins, rosin-modified maleate resins or drying oil-modified terpene-maleic anhydride resins, polymerised naphthalene, polymerised coumarone and indene resins, phenol-formaldehyde resins, and polyhydric alcohol esters of hydrogenated rosin.  Specified emulsifying agents are sodium lauryl or stearyl sulphate, sulphonated castor or olive oil, sodium stearate, sodium or potassium oleate and sodium isopropyl- or butyl-naphthalenesulphonate.  In examples, (1) a mixture of ethyl cellulose, xylene, naphtha, butanol, triphenyl phosphate and the glycerol ester of hydrogenated rosin is emulsified with water containing potassium oleate and the resulting oil-in-water emulsion is converted into a water-in-oil emulsion by stirring into it a solution of aluminium stearate in pine oil, acetic acid and finally one of the above pigments together with additional water and a petroleum solvent, the product being printed on a cotton fabric which is then dried at about 260 DEG  F., (2) a solution of ethyl cellulose in xylene and butanol is emulsified with water containing potassium oleate and the resulting oil-in-water emulsion is converted into a water-in-oil emulsion by stirring into it pine oil, acetic acid, a petroleum solvent and finally Monastral green toner pulp with additional water and petroleum solvent, the product being printed on a cotton fabric, which is then dried at 260 DEG  F., (3) a solution of ethyl cellulose and mineral oil in a mixture of xylene, naphtha and butanol is emulsified with water containing potassium oleate and the resulting oil-in-water emulsion is converted as in (2) into a printing paste, containing Green lake as pigment, for use as in (2), (4) a solution of ethyl cellulose and the diethylene glycol ester of hydrogenated rosin in a mixture of xylene, naphtha and butanol is emulsified with water containing potassium oleate and the resulting oil-in-water emulsion is converted as in (2) into a printing paste, containing C.P. Chrome yellow LM as pigment, for use as in (2) (5) a solution of ethyl cellulose and a glycerol ester of hydrogenated rosin in a mixture of xylene, naphtha, butanol, pine oil and a petroleum solvent is mixed with more petroleum solvent, acetic acid and water and the resulting water-in-oil emulsion is mixed with more petroleum solvent and an aqueous dispersion of Monastral green toner pulp, the product being printed on a cotton fabric, which is then dried at 260 DEG  F. Specifications 333,570 and 523,090 are referred to.  The Specification as open to inspection under Sect. 91 comprises also the use of pigments under the names Vulcan fast yellow 5O, Vulcan fast red B, Vulcansol blue G and Monastral blue toner pulp. This subject-matter does not appear in the Specification as accepted. Reference has been directed by the Comptroller to Specifications 333,570, [Class 2 (ii)], and 523,090, (as open to inspection under Sect. 91).