use of a dye, a dye stable to alkalies, fleeting, of textile materials

摘要

1339619 Triarylmethane compounds DEERING MILLIKEN RESEARCH CORP 19 April 1971 [18 June 1970] 26377/71 Heading C4P [Also in Division C2] The invention comprises compounds of the formula in which R is alkyl, aryl or -(CH 2 CH 2 O) n H; X is an electron withdrawing radical; Y is H, SO 3 H or SO 3 M where M is an alkali metal atom; Z is an anion; R 1 and R 2 are H, halogen, alkyl or alkoxy, or together with the benzene nucleus to which they are attached form a naphthalene nucleus, and n is an integer from 10-100. The compounds may be prepared by reacting 2 moles of an amine of formula with one mole of an aldehyde of formula in the presence of an acid catalyst to form the leuco base of the formula oxidizing this to the corresponding carbinol by means of an oxidizing agent and reacting the carbinol with an acid HZ to give the compounds of Formula I. The second and final stages may be effected simultaneously if an acid is used in the second stage. The compounds may be used as blue and green fugitive tints, e.g. in textile fibres, soaps and detergents.