GB655276A - Improvements in the colouration of textile and other materials - Google Patents

Abstract

Polymers containing at intervals along the polymer chain an amidine grouping of which the carbon atom and one of the nitrogen atoms directly attached thereto are in the main polymer chain may be prepared by condensation of a linear polyaminotriazole having terminal hydrazide groups with a linear polyamide having terminal amino groups; or by condensation of a polyaminotriazole derived from sebacic di-hydrazide with polyhexamethylene adipamide having terminal amino groups; or by heating together in a mobile state and until a polymer is produced a mixture comprising hydrazine, a dicarboxylic acid and another bifunctional amide-forming component, or substances which produce such a mixture on hydrolysis, the components being so proportioned that the sum of the amino groups and hydrazine groups present exceeds the number of carboxylic groups present and the number of amino groups does not substantially exceed the number of carboxylic groups. Specifications 612,609, 613,020, 627,124 and 655,277 are referred to.ALSO:Filaments and the like made from a polymer containing at intervals along the polymer chain an amidine grouping of which the carbon atom and one of the nitrogen atoms directly attached thereto are in the main polymer chain, are coloured by applying thereto a dyestuff having affinity for cotton. Preferably the filaments have been oriented by drawing. The polymer may be that obtainable by condensation of a linear polyaminotriazole having terminal hydrazide groups with a linear polyamide having terminal amino groups; or by condensation of a polyaminotriazole derived from sebacic di-hydrazide with polyhexamethylene adipamide having terminal amino groups; or by heating together in a mobile state and until a polymer is produced a mixture comprising hydrazine, a dicarboxylic acid and another bifunctional amide-forming component, or substances which produce such a mixture on hydrolysis, the components being so proportioned that the sum of the amino groups and hydrazine groups present exceeds the number of carboxylic groups present and the number of amino groups does not substantially exceed the number of carboxylic groups. The dyestuffs may be applied by bath or by mechanical impregnation methods, e.g. by padding or printing. In examples: (1) yarn obtained by cold drawing a polymer prepared from a diamine-stabilized polyhexamethylene adipamide and a polyaminotriazole prepared from sebacic dihydrazide and hydrazine hydrate according to the method described in example (11) of Specification 627,124, [Group IV (a)], is dyed with a mixture of direct cotton dyes, or a yarn prepared as in example (4) of Specification 655,277, [Group IV (a)], is dyed with Chlorazol Fast Scarlet 4BS; (2) yarn as in (1) is dyed from a vat containing Caledon Olive Green B 200; (3) yarn as in (1) is dyed on a jig with reduced Caledon Blue RN; and (4) yarn as in (1) is dyed from a vat prepared with Thional Brilliant Green GS, sodium sulphide and sodium carbonate. Specifications 612,609 and 613,020, [both in Group IV (a)], also are referred to.