초록 ▼

Laundry bleaching and detergent compositions comprising a peroxygen bleaching agent and a catalyst system therefor, the catalyst system comprising a heavy metal cation of defined bleach catalytic activity, particularly copper, iron or manganese cations, an auxiliary metal cation having little or no

Laundry bleaching and detergent compositions comprising a peroxygen bleaching agent and a catalyst system therefor, the catalyst system comprising a heavy metal cation of defined bleach catalytic activity, particularly copper, iron or manganese cations, an auxiliary metal cation having little or no bleach catalytic activity, particularly zinc or aluminium cations, and a sequestrant having defined stability constants for the catalytic and auxiliary metal cations, particularly ethylenediaminetetraacetic acid, ethylenediaminetetra(methylenephosphonic acid) and water-soluble salts thereof. The laundry bleaching and detergent compositions deliver improved bleach performance, particularly at medium to high wash temperatures. Catalyst compositions for peroxygen bleaching agents are also disclosed.

대표청구항 ▼

A laundry detergent composition comprising from about 0% to about 40% of surfactant selected from anionic, nonionic, ampholytic and zwitterionic surfactants and mixtures thereof, from about 5% to about 90% of inorganic or organic detergency builder, from about 5% to about 35% of particulate peroxyge

A laundry detergent composition comprising from about 0% to about 40% of surfactant selected from anionic, nonionic, ampholytic and zwitterionic surfactants and mixtures thereof, from about 5% to about 90% of inorganic or organic detergency builder, from about 5% to about 35% of particulate peroxygen bleaching agent, and from about 0.05% to about 2% of a catalyst system soluble in water at pH 10 and comprising a dry mixture of: (a) a first particulate component comprising a catalytic heavy metal cation having a catalytic activity for decomposition of the peroxygen bleaching agent of at least 10%, selected from the group consisting of cations of vanadium, chromium, manganese, iron, cobalt, copper, osmium, platinum, palladium, silver, mercury, and lead, (b) a second particulate component comprising an auxiliary metal cation having a catalytic activity for decomposition of the peroxygen bleaching agent of less than 10%, selected from the group consisting of cations of zinc, aluminum and nickel, and (c) a water soluble sequestrant selected from the group consisting of ethylenediaminetetraacetic acid, diethylenetriaminepentaacetic acid, ethylenediaminetetra-(methylenephosphinic acid), diethylenetriaminepenta-(methylene phosphonic acid), and alkali-metal and alkaline-earth metal salts thereof, wherein the molar ratio of the sum total of (auxiliary metal cation+catalytic heavy metal cation) to sequestrant is in the range from 1:1 to 20:1 and the molar ratio of sequestrant to catalytic heavy metal cation is in the range from 1:1 to 40:1.