| 摘要 |
1,226,633. Colouring compositions. CIBA Ltd. 11 Nov., 1968 [10 Nov., 1967; 20 Sept., 1968], No. 53242/68. Heading C4A. [Also in Division C3] A composition for colouring viscose comprises (a) an organic sulphonamido pigment free from complex-forming metals and containing at least one group -SO 2 NHR- (R=H or aryl) dissolved in (b) a water-soluble emulsifier. Emulsifier (b) may contain up to 50% water, by weight. Optionally (c) an organic polar solvent for the pigment is included, which is watermiscible in all proportions and inert towards viscose; (b) and (c) may be the same compound. Suitable pigments (a) are those of the azo, anthraquinone and indigo series; particularly azo pigments containing the group R-NH-O 2 S-F, where F is an azo residue. Numerous nonionic and cationic emulsifiers are specified for component (b). Numerous solvents (c) are mentioned, having boiling points above 100‹ C. Reference has been directed by the Comptroller to Specification 1,128,158.
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