Patent GB-367864-A (GB)
Title: Improvements in and relating to the production and use of dyestuff preparations
IPC: C09B67/28
Filed: 1930-08-19
Abstract: Oils, fats and waxes are coloured and may be gelatinized by dissolving therein dyestuff preparations obtained by incorporating a vat-dyestuff with an insoluble metal soap and any organic liquid to form a solution or colloidal solution, the vat-dyestuff, insoluble metal soap and any other ingredient being substantially dry before incorporation into the organic liquid. The vat colour may be incorporated with the insoluble metal soap prior to the treatment with the organic liquid.  The term "insoluble metal soap" includes metal salts other than sodium, potassium and ammonium and the like, for example it includes calcium, aluminium, magnesium, copper, zinc, lead and nickel salts of fatty acids containing eight or more carbon atoms in the molecule, such as oleic, stearic, palmitic, erucic, lauric and rosin acids.  According to one example, a thin gel is obtained by dissolving 5 lb. of aluminium stearate containing 1 lb. of Caledon Blue in 100 lb. of benzene.ALSO:Dyestuff preparations are obtained by incorporating a vat dyestuff with an insoluble metal soap and an organic liquid to form a solution or colloidal solution, the vat-dyestuff, insoluble metal soap and any other ingredient being substantially dry before incorporation with the organic liquid The term "vat dyestuff" includes colouring matters of the anthraquinone and indigo series and substances of anthraquinone or indigoid or similar structure which may not be suitable for dyeing fabrics by the vat process. The term "insoluble metal soap" includes metal salts other than sodium, potassium, and ammonium and the like, for example it includes calcium, magnesium, aluminium, copper, zinc, lead and nickel salts of fatty acids containing eight or more carbon atoms in the molecule, such as oleic, stearic, palmitic, erucic, lauric, and rosin acids.  The term "organic liquid" does not include reactive, especially basic organic liquids such as ethanolamines. The vat colour may be incorporated with the insoluble metal soap prior to the treatment with an organic liquid; this may be effected by admixture in the molten condition, or by adding the colour during the formation of the soap or during the preparation of one of the starting materials for the formation of the soap. The preparations can be used for dyeing and waterproofing materials, for example materials made from animal or vegetable fibre, as textiles, canvas, rexines and leathers, for incorporation in oil, wax, and spirit, for colouring pharmaceutical preparations &c.  In examples (1) aluminium sulphate and Caledon Jade Green are added to an aqueous soap solution and the precipitated curds separated and dried; the product is dissolved in an organic liquid such as petroleum ether; alternatively the colour paste of Caledon Jade Green is added directly to molten aluminium stearate to give a product suitable for solution in the organic liquid; instead of Caledon Jade Green, Caledon Blue RC may be used; (2) a petroleum ether solution of Caledon Jade Green and aluminium stearate is used for impregnating canvas, the spirit being then removed by evaporation, a deep fast green water-proofed cloth being obtained; khaki shades are obtained if the Caledon Jade Green is replaced by a mixture of Caledon Brown R, Caledon Olive R and Caledon Yellow G; (3) a mixture of an aqueous suspension of aluminium hydroxide and Caledon Blue 3G paste is heated with palmitic acid, and water expressed from the product; the dry product is in a suitable form for dissolving in an organic liquid; (4) to a hot mixture of Caledon Brown R and sodium stearate is added zinc sulphate solution and the brown zinc stearate so obtained filtered off; the dry product is in a suitable form for dissolving in an organic liquid.; (5) an aqueous paste of Caledon Red BN is added to a solution of sodium oleate; zinc sulphate is added to the hot solution and the coloured zinc oleate separated, dried, dissolved in an organic solvent, and used for dyeing fabrics; (6) coloured aluminium stearate containing Caledon Blue 3G is dissolved in benzene by heating to give a thin gel; this preparation is used directly for printing, for example canvas, the printed material being dried on steam-heated cans and then washed, if necessary.