Patent GB-570742-A (GB)
Title: Improvements in or relating to the preparation of printing colours
IPC: D06P1/44
Filed: 1940-06-11
Abstract: A preparation for use in printing textiles is obtained by grinding a glycerophthalic resin, modified by a siccative fatty acid, with a pigment, preferably in presence of a water-insoluble solvent for the resin, and, thereafter, emulsifying the mixture in water with the aid of an emulsifying agent.  The resin may contain, in addition to the residues of glycerol, phthalic acid and a siccative fatty acid, residues of other polybasic acids (with the exception of unsaturated aliphatic polycarboxylic acids) other polyhydric alcohols, monohydric alcohols or monobasic acids other than siccative fatty acids. Specified emulsifying agents are water-soluble methyl- and hydroxyethyl-cellulose, polyvinyl alcohol, polyvinyl acetate made water-soluble by partial saponification, water-soluble condensation products of ethylene oxide with water-insoluble organic compounds containing reactive hydrogen, alkali caseinates and salts of carboxylic or sulphonic acids or sulphuric acid esters of high molecular weight. Emulsification may be facilitated by the addition of water-soluble solvents, ammonia, volatile amines or triethanolamine.  Concentrated aqueous pastes, containing the resin, the pigment and the emulsifying agent and suitable for storage, may be prepared and diluted, immediately before use, with an organic solvent and water.  In examples: (1) a resin, obtained by reaction of glycerol, phthalic anhydride and dehydrated castor oil at 180 DEG  C. with further heating to 270 DEG  C., is ground with Pigment fast red HL, xylene and, if desired, a drier such as cobalt naphthenate, and the mixture is emulsified with an aqueous solution of methylcellulose containing triethanolamine; the product gives on cotton or viscose artificial silk prints which, p  on drying for 5 minutes at 110 DEG C., are fast to rubbing and washing; (2) the resin of (1) is further condensed with phthalic anhydride at 180 DEG  C., then with glycerol at 160 DEG  C., and the product is ground with Monastral fast blue B, xylene and, if desired, a drier, such as a mixture of naphthenates of cobalt and lead, and the mixture is emulsified as in (1) with a further addition of a solution of ethylcellulose in xylene; the product gives similarly fast prints on wool or silk; (3) a resin, obtained by reaction of glycerol, phthalic anhydride and dehydrated castor oil at 180 DEG  C., with further heating at 180-200 DEG  C., is ground with Monastral fast blue G, xylene and, if desired, a drier, and the mixture is emulsified with an aqueous solution of methylcellulose containing triethanolamine with a further addition of a resin made by reacting glycerol with soya oil at 280 DEG  C. in presence of calcium acetate and then with phthalic anhydride and more glycerol at 180 DEG  C.; the product gives similarly fast prints on a fabric woven from glass fibres; (4) a resin prepared as in (2) is ground with Fanal red 6B and xylene, the mixture is emulsified with an aqueous solution of methylcellulose containing triethanolamine and the emulsion is diluted with xylene, containing, if desired, a cobalt naphthenate drier, and with water; the product gives similarly fast prints.