ENHANCING THE APPARENT WHITENESS OF FABRICS BY APPLYING AN EFFECTIVE AMOUNT OF AN ALKALI AND HEAT STABLE WATER SOLUBLE DISAZO BLUE DYESTUFF FABRIC SOFTENING AND DETERGENT COMPOSITION THEREFOR

摘要

1384907 Compositions for whitening fabrics COLGATE-PALMOLIVE CO 8 March 1972 [15 March 1971] 10832/72 Heading C4A [Also in Division D1] A laundry composition comprises an organic surfactant and a water-soluble alkali-stable and heat-stable disazo blue dyestuff, but contains no hypochlorite bleach. If formulated as a granular solid up to 0À005% by wt. of the dyestuff may be present, and if as a liquid up to 0À01%. The dyestuff may be of general Formula I wherein each of R, R 1 , R 2 , R 3 , R 4 and R 5 is selected from hydrogen, halogen, hydroxyl, alkoxy (1-3C) and alkyl (1-3C), M is alkali metal or alkaline earth metal and A is NH, NH.CO.NH or NH.aryl.NH. The dyestuff may be in the form of a metal (e.g. copper, nickel or cobalt) complex. The use of CI Direct Violet 43 (which is the bis-copper complex of I where R, R 1 , R 2 and R 3 are OH; R 4 and R 5 are H, A is NH and M is Na) and C.I. Acid Blue 113 (which is II where R and R 1 -R 5 are all H, A is NH and M is Na) and mixtures of these together is exemplified. The dyestuff may be formulated as a granular or liquid detergent composition, a soap composition or a presoak composition. Many anionic, non-ionic, polar non-ionic, amphoteric, zwitterionic and cationic detergents, alkali metal soaps, builders, optical brighteners, germicides, soil suspending agents and antioxidants which may be incorporated into the compositions are specified. In Examples 1-10, which disclose dyestuff containing granular detergent compositions, the additives include: linear tridecyl benzene sulphonate the reaction product of 11 moles ethylene oxide with one mole of a blend of C 14 -C 15 primary alcohols, carboxymethyl cellulose, polyvinyl alcohol and the nonal builders. Example 11 relates to a soap powder composition based on the sodium soap of mixed tallow and coconut fatty acids and containing C.I. Acid Blue 113. Examples 12-14 concern liquid detergent compositions based on sodium xylene sulphonate and the reaction product of 3 moles ethylene oxide with one mole of a blend of C 12 -C 15 primary alkanols and containing sodium citrate in addition to the dyestuff. Example 16 describes a presoak composition based on linear tridecyl benzene sulphonate, and containing Alcalase Novo Protease enzyme, the usual builders and C.I. Acid Blue 113. Example 15 discloses a softening composition comprising 2-heptadecyl-1-methyl- [(2 - stearoxylamido)ethyl] - imidazolinium methyl sulphate, C.I. Acid Blue 113, optical brightener, perfume and water.