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US 4,300,897 AGranted
Method for bleaching with peroxymonosulfate-based compositions
AssigneeColgate-Palmolive Company
InventorFrederick W. Gray
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AssigneeColgate-Palmolive Company
InventorFrederick W. Gray
Estimating the term…
A method of bleaching fabrics, effective to remove stains and safe for dyed fabrics, includes bleaching such a fabric in an aqueous medium containing bleaching composition including a water soluble peroxymonosulfate bleach, a water soluble inorganic bromide which promotes the bleaching activity of the peroxymonosulfate and an N-hydrogen compound of a certain type, such as para-tolulenesulfonamide or 5,5 dimethylhydantoin which inhibits destruction of dyes and overbleaching of dyed materials while stains to be bleached are effectively removed. Washing may also be effected with the bleaching in which case bleaching detergent composition are employed, which also contain a normally solid, water synthetic organic detergent, such as an anionic detergent, which may be a sodium linear higher alkylbenzenesulfonate or a higher fatty alcohol polyethylene oxide condensate, or a mixture thereof. Such compositions and the aqueous washing media may also include a builder salt.
A method of bleaching stained dyed laundry fabrics which comprises bleaching said fabrics in an aqueous medium comprising about 5 to 25 parts of a water soluble peroxymonosulfate bleach, about 3 to 20 parts of a water soluble inorganic bromide, in sufficient quantity to promote the bleaching activity of the peroxymonosulfate bleach, and about 2 to 30 parts of an aromatic sulfonamide compound selected from the group consisting of benzene sulfonamide and alkylbenzene sulfonamides wherein the alkyl is of about 1 to 12 carbon atoms, N-alkali metal salts of said sulfonamides, N-acetyl and N-benzoyl derivatives of said sulfonamides and of said salts of said sulfonamides, and mixtures of such sulfonamides, salts and derivatives, which inhibits destruction of dyes and overbleaching of dyed materials present in the aqueous medium while stains to be bleached are effectively removed from the fabrics.
A method of washing and bleaching stained dyed laundry fabrics which comprises immersing said fabrics in an aqueous medium comprising about 5 to 50 parts of a water soluble synthetic organic detergent, about 5 to 25 parts of a water soluble peroxymonosulfate bleach, about 3 to 20 parts of a water soluble inorganic bromide, in sufficient quantity to promote bleaching activity of the peroxymonosulfate bleach, and about 2 to 30 parts of an aromatic sulfonamide compound selected from the group consisting of benzene sulfonamide and alkylbenzene sulfonamides wherein the alkyl is of about 1 to 12 carbon atoms, N-alkali metal salts of said sulfonamides, N-acetyl and N-benzoyl derivatives of said sulfonamides and of said salts of said sulfonamides, and mixtures of such sulfonamides, salts and derivatives, which inhibits destruction of dyes and overbleaching of dyed materials present in the aqueous medium while stains to be bleached are effectively removed from the fabrics.
Dependencies are inferred from the claim text.