Hypochlorite bleaching compositions and delivery systems...

C - Chemistry – Metallurgy – 11 – D

Patent

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Details

C11D 3/395 (2006.01) C11D 3/26 (2006.01) C11D 3/28 (2006.01) C11D 17/04 (2006.01)

Patent

CA 2286731

The invention provides a bleaching composition of pH 8-14 which comprises an oxygen transfer agent and hypochlorite or a source thereof and a method for bleaching a stained substrate which comprises the step of treating the substrate with a bleaching composition of pH 8-14 which bleaching composition comprises an oxygen transfer agent and hypochlorite or a source thereof. Oxygen transfer agents for use in the invention, include, but are not limited to, the imine quat. N- methyl-3.4-dihydroisoquinolinium salts. Where these salts are used, suitable counter-ions include halides, sulphate, methosulphate, sulphonate, p-toluene sulphonate and phosphate. Oxygen transfer agents which comprise a quaternary nitrogen atom are preferred. In the alternative, the oxygen transfer agent can be a sulphonimine.

L'invention a pour objet une composition de blanchiement dont le pH se situe entre 8 et 14. Cette composition comprend un agent de transfert d'oxygène et de l'hypochlorite ou une source de ce dernier. L'invention traite également d'un procédé pour blanchir un substrat tâché qui consiste à traiter ce substrat à l'aide d'une composition de blanchiement dont le pH se situe entre 8 et 14, et qui comprend un agent de transfert d'oxygène et de l'hypochlorite ou une source de ce dernier. Les agents de transfert d'oxygène prévus pour être utilisés dans la présente invention comprennent, sans pour autant s'y limiter, des sels de N-méthyl-3,4-dihydroisoquinolinium Imine Quat. Lors de l'utilisation de ces sels, des contre-ions appropriés comprennent des halogénures, du sulfate, du méthosulfate, du sulfonate, du sulfonate p-toluène et du phosphate. Les agents de transfert d'oxygène préférés comprennent un atome d'azote quaternaire. Selon un autre mode de réalisation, l'agent de transfert d'oxygène peut être une sulfonimine.

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