Abstract:
Process for the dyeing and printing of textile materials made from polymers or copolymers of acrylonitrile by using dyestuffs of the general formula
IN WHICH R1 represents an alkyl, aralkyl, aryl or heterocyclic radical which may be substituted R2 represents hydrogen or an alkyl or aralkyl radical which may be substituted, Q represents an aromatic or heterocylic radical which may be condensed with the benzene nucleus b, and X represents an anion and the benzene radicals a and b as well as the radical Q may contain further non-ionogenic substituents. The dyeings and prints thus obtained show a good fastness to light, wet processing, washing, fulling, over-dyeing, to chlorine, to perspiration and to carbonizing as well to decatizing, steaming, ironing, rubbing and to solvents.
IN WHICH R STANDS FOR A LOWER ALKYL GROUP WHICH MAY BE SUBSTITUTED, R1 AND R2 EACH STANDS FOR A HYDROGEN ATOM OR A LOWER ALKYL GROUP WHICH MAY BE SUBSTITUTED AND WHICH MAY FROM TOGETHER WITH THE NITROGEN ATOM ALSO A HETEROCYCLIC RADICAL, R3 STANDS FOR A HYDROGEN ATOM OR A LOWER ALKYL GROUP WHICH MAY BE SUBSTITUTED, R4 STANDS FOR A HYDROGEN ATOM, A LOWER ALKYL GROUP WHICH MAY BE SUBSTITUTED, AN ARYL GROUP WHICH MAY BE SUBSTITUTED, OR TOGETHER WITH THE NITROGEN ATOM AND R3 OR THE BENZENE NUCLEUS R4 MAY FORM A HETEROCYCLIC RADICAL, AND X STANDS FOR AN ANION, AND THE BENZENE NUCLEUS A MAY CARRY FURTHER NONIONIC SUBSTITUTENTS OR A FUSED BENZENE NUCLEUS. THE NOVEL DYESTUFFS ARE SUITABLE FOR THE DYEING OR PRINTING OF TANNINED CELLULOSE FIBERS, SILK, LEATHER OR FULLY SYNTHETIC FIBERS, SUCH AS ACETATE RAYON, POLYAMIDE FIBERS OR ACID-MODIFIED POLYAMIDE OR POLYESTER FIBERS, ESPECIALLY OF FIBERS CONTAINING POLYACRYLONITRILE OR POLYVINYLIDENE CYANIDE. THE DYEINGS PRODUCED ON THESE FIBERS ARE MOSTLY VERY BRIGHT AND HAVE A GOOD TINCTORIAL STRENGTH AS WELL AS, IN GENERAL, GOOD FASTENESS PROPERTIES TO LIGHT AND WET PROCCROSS-DYEING, CARBONIZING, TO THE ACTION OF CHLORINE AND TO PERSPIRATION.
Abstract:
Chlorozincate salts of benzothiazonium azo compounds are prepared by reacting benzothiazolium azo compounds with an dialkylsulfate having from 1 to 4 carbon atoms in the alkyl radicals, which process comprises carrying out the reaction in an aqueous medium at a temperature of from 10 DEG to 80 DEG C. in the presence of an acid acceptor and the alkylation with the use of from 1.8 to 2.5 mols of the dialkylsulfate, calculated on the starting azo dyestuff, at a pH not exceeding 7. The prepared benzothiazolium azo compound is precipitated as chlorozincate salt, especially with the use of an alkali metal chloride. According to this process, the chlorozincate salts are obtained in higher purity. A perceptible decomposition of the benzothiazolium azo compound does not occur. Chemicals, for example the alkylation agent and acid-binding agents need be used in a small quantity. In addition to this economy and to the less pollution of the waste water, the process has the advantage that it can be carried out with the use of a small reaction volume.
Abstract:
Process for the manufacture of 6-nitro-9-amino-2-ethoxy-acridine, wherein 6-nitro-9-chloro-2-ethoxyacridine is reacted with urea in a polar organic solvent in the presence of salts of weak bases with strong acids and, if desired or required, in the presence of catalytic amounts of an aromatic mono- or polyhydroxy compound.