EP0549271B1
Expired / Lapsed
EP
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Bleach activation using a manganese compound and an organic ligand
Assignee: Unilever PLC
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Filing: 1992-12-18
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Granted: 1997-10-08
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Expires: 2012-12-18
Abstract
No abstract record available.
Inventors
- 👤 Ronald Hage
- 👤 Jan Eric Iburg
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-28 12:44
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/26; C11D3/28; C11D3/39; C11D3/3902; C11D3/3905; C11D3/3932
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
48 words
A cleaning composition comprising a source of manganese ions, a surface active material and a ligand L of formula (I):- wherein:- t is 2; s is 3; u is one; R 1 , R 2 and R 3 are each independently selected from hydrogen and C 1 alkyl.
Claim 2
Dependent Claim
11 words
A composition according to claim 1, further comprising a peroxy compound.
Claim 3
Dependent Claim
142 words
A composition according to claim 1 or 2, further comprising a mononuclear or dinuclear manganese complex of formula (A) [ L n Mn m X p ] z Y q (A) wherein n and m are independently 1 or 2; p is an integer from 1 to 3 z denotes the charge of the complex and is an integer which can be positive, zero or negative; Y is a counterion the type of which is dependent upon the charge z of the complex; q = z /[ charge Y ]; Mn is manganese in the II, III or IV oxidation state or mixtures thereof; X is a coordinating or bridging species; and L is a ligand of formula (B) wherein:- t is 2; s is 3; R 1 , R 2 and R 3 are each independently hydrogen and C 1 alkyl.
Claim 4
Dependent Claim
31 words
A composition according to anyone of claims 1-3, wherein the source of manganese ions is selected from manganese nitrate, manganese chloride, manganese sulphate, manganese acetate, manganese acetylacetonate and manganese ethylenediaminetetracetic acid.
Claim 5
Dependent Claim
65 words
A detergent composition comprising i) from 2 to 30% by weight of a peroxy compound; ii) up to 50% by weight of a surface-active material; iii) a source of manganese ions, iv) a ligand of formula (I) wherein:- t is 2; s is 3; u is one; R 1 , R 2 and R 3 are each independently selected from hydrogen and C 1 alkyl.
Claim 6
Dependent Claim
38 words
A composition according to claim 5, wherein the ligand of formula (I) is present at a level from 0.003 to 300 ppm and the source of manganese ions is present at a level from 0.001 to 100 ppm.
Claim 7
Dependent Claim
19 words
A composition according to claim 5 or 6, further comprising 5 to 80% by weight of a detergency builder.
Claim 8
Independent Claim
81 words
A method for bleaching a stained substrate,the method comprising contacting the stained substrate in an aqueous medium with a peroxy compound: a source of manganese ions, and a ligand each in an effective amount to interact with one another and provide a cleaning effect upon the substrate, the ligand having the formula (I). wherein:- t is 2; s is 3; u is one; R 1 , R 2 and R 3 are each independently selected from hydrogen and C 1 alkyl.
References Cited (Backward Citations)
No citation records indexed.
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