GB547059A - Improvements connected with the printing and colouring of materials - Google Patents

Abstract

547,059. Synthetic resin dispersions. AMERICAN CYANAMID CO. Jan. 5, 1940, No. 327. Convention date, Jan. 21, 1939. [Class 1 (i)] [Also in Group IV] A coloured aqueous dispersion of a waterinsoluble synthetic resin for use in printing or otherwise colouring fibres and fabrics contains a minor proportion in relation to the resin of a cellulose ether substantially insoluble in water, but soluble in organic solvents. The resins may be of the alkyd, phenol-aldehyde, urea-aldehyde or polymerized vinyl ester types. The colours may be water-soluble dyes or may be pigments such as ultramarine, phthalocyanines, phosphotungstic or phosphomolybdic lakes of basic dyestuffs or coloured artificial resin complexes. In examples (1) dimethylolurea is refluxed with a large excess of cyclohexanol and part of the alcohol is removed to obtain a 50 per cent. solution of the resin in the alcohol, ethyl cellulose is dissolved in this solution and an oilmodified glycerophthalate resin is stirred in at 80-90‹ C., followed by addition of an ammoniacal casein solution with stirring to form a stable emulsion which is homogenized by passage through a colloid mill, aged for 24 hours, and pigmented by grinding therein a mixture of Vat brown RRD and oxidized Nigrosine; (2) ethyl cellulose is stirred into a 50 per cent. solution at 80‹ C. of a urea-aldehyde resin in cyclohexanol, prepared as in (1) and an oil-modified glycerophthalate resin is stirred into the mixture, a second mixture of the same 50 per cent. solution with dibutyl phthalate and the same oilmodified resin is made and the two mixtures are together emulsified with an ammoniacal casein solution or each is emulsified separately and the emulsions mixed; the complete emulsion is then pigmented with Vat brown RRD; (3) ethyl cellulose is stirred into pine oil and dibutyl phthalate at 80‹ C. and an oil modified glycerophthalate resin is stirred and milled into the mixture which is then pigmented by grinding into it a mixture of copper phthalocyanine and Anthraflavone G co-precipitated in presence of blanc fixe; a 50 per cent, solution in butanol of a ureaaldehyde resin made by refluxing dimethylolurea with butanol and a similar 50 per cent. solution in octanol are then milled in and the whole is emulsified with an ammoniacal casein solution; (4) benzyl cellulose is stirred into a mixture of pine oil, xylene and an alkyd-modified phenolformaldehyde resin at 80‹ C. and an air or heatconverting alkyd resin is stirred and milled into the mixture, which is then pigmented by milling into it a presscake of Indanthrene blue RS; a 50 per cent. solution in butanol of a urea-aldehyde resin and a similar 50 per cent. solution in octanol, both prepared as in (3), are then milled in and the mixture is emulsified with an ammonium linoleate solution. Nitroparaffins are also specified as blending solvents. Specification 344,458 is referred to.