Patent GB-610126-A (GB)
Title: Compositions containing diazotizable amines or diazonium salts thereof
IPC: D06P1/12
Filed: 1946-03-27
Abstract: Amides of the formula <FORM:0610126/IV(b)/1> wherein R represents an alkenyl radical containing not more than 4 carbon atoms and R1 and R11 represent hydrogen or alkyl, omegahydroxyalkyl or alkenyl radicals containing not more than 4 carbon atoms, are prepared by reacting the corresponding olefin carboxylic acid with ammonia or an amine or by the dehalogenation of the corresponding dibromo or dichloro derivative or by the dehydrohalogenation of the corresponding monobromo or a monochloro derivative of the saturated amide.  In examples, crotonamide is prepared from crotonyl chloride and liquid ammonia, N-allyl crotonamide from crotonyl chloride and allyl amine and N-ethyl crotonamide from ethylamine and crotonyl chloride.ALSO:A composition for the preparation of printing pastes containing carbohydrate thickeners comprising an ice colour forming component associated with an olefin carboxylic acid amide of the general formula <FORM:0610126/IV (c)/1> wherein R represents an alkaryl radical containing not more than four carbon atoms, R1 and R11 represent hydrogen, or alkyl, omega-hydroxyalkyl or alkaryl radicals containing not more than four carbon atoms, the amount of olefin carboxylic acid amide being sufficient substantially to inhibit thinning when a carbohydrate thickener is incorporated with the composition in a printing paste, e.g. in an amount from 20 to 50 per cent of the amount of the ice colour forming component calculated as diazotisable amine.  Specified olefin carboxylic acid amides are acrylamide, methylol acrylamide, methyl acrylamide, crotonamide, N-allyl crotonamide, N : N - diallyl crotonamide, N - ethyl crotonamide, dimethyl-acrylamide, vinyl acetamide, beta-ethyl acrylamide, allyl acetamide and tiglic acid amide.  Many suitable ice colour forming components are specified.  In examples: (1) to (6) printing preparations are prepared employing the zinc chloride double salt of the diazonium chloride derived from 4-methyl-2-nitro-, 4-chloro-2-nitro-, 2-methoxy-5-nitro-, 2 : 5-dichloro-, or 4-methoxy-2-nitroaniline or the zinc chloride double salt of the tetrazonium chloride derived from ortho-dianisidine, acrylamide and carob bean gum, the zinc chloride double salt of the diazonium chloride derived from 4 - methyl - 2 - nitro-, 4-methoxy - 2 - nitro-, or 4-chloro-2-nitroaniline, methacrylamide and carob bean gum, the zinc chloride double salt of the diazonium chloride derived from 4-methyl-2-nitro- or 4-chloro-2-nitroaniline, N-methylol acrylamide and carob bean gum, the zinc chloride double salt of the diazonium chloride derived from 4-methoxy-2-nitro- or 4-chloro-2-nitroaniline, crotonamide and carob bean gum, the zinc chloride double salt of the diazonium chloride derived from 4-methoxy-2-nitroaniline and N-allyl crotonamide, the zinc chloride double salt of the diazonium chloride derived from 4-chloro-2-nitroaniline, N-ethyl crotonamide and carob bean gum, and are used for the preparation of fast colour prints on material impregnated with the anilide of 2 : 3-hydroxy-naphthoic acid; (7) a printing paste is prepared by mixing 4-methoxy-2-nitroaniline, acrylamide and sodium chloride, diazotizing and mixing with carob bean gum; (8) similarly, a printing paste is prepared from 2-methoxy-4-nitroaniline, methacrylamide and magnesium sulphate and is applied to fabric impregnated with the anilide of 2 : 3-hydroxynaphthoic acid.