EP0443651A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Bleach activation
Assignee: Unilever PLC
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Filing: 1991-02-05
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Granted: —
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Expires: 2011-02-05
Abstract
Abstract A stable and effective manganese complex for use as a peroxy compound bleach catalyst is disclosed, said catalyst being a water-soluble complex of manganese (II), (III), or (IV) or mixtures thereof with a ligand which is a non-carboxylate polyhydroxy compound having at least three consecutive C-OH groups in its molecular structure. Bleaching composition comprising a peroxy compound and said catalyst, as well as process for bleaching substrates using said catalyst are also disclosed. Preferred ligand is sorbitol and preferred catalyst is Mn-sorbitol complex.
Inventors
- 👤 Marten Robert P. Van Vliet
- 👤 Jan Eric Iburg
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 19:00
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3902; C11D3/3905; C11D3/3932
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
57 words
A bleaching composition comprising a peroxy compound bleach and a catalyst for the bleaching action of said peroxy compound, characterized in that said catalyst is a water-soluble complex of manganese (II), (III) or (IV) or mixtures thereof with a ligand which is a non-carboxylate polyhydroxy compound having at least three consecutive C-OH groups in its molecular structure.
Claim 2
Dependent Claim
28 words
A composition according to Claim 1, characterized in that said non-carboxylate polyhydroxy compound ligand contains at least 5 consecutive carbon atoms having at least 4 consecutive hydroxyl groups.
Claim 3
Dependent Claim
26 words
A composition according to Claim 2, characterized in that said ligand contains from 5 to 8 consecutive carbon atoms having 4 to 8 consecutive hydroxyl groups.
Claim 4
Dependent Claim
13 words
A composition according to Claim 3, characterized in that said ligand is sorbitol.
Claim 5
Dependent Claim
28 words
A composition according to any of Claims 1-4, characterized in that the molar ratio of ligand to manganese in the manganese complex bleach catalyst is at least 1:1.
Claim 6
Dependent Claim
22 words
A composition according to Claim 5, characterized in that said molar ratio is from 5:1 to 100:1, preferably from 20:1 to 50:1.
Claim 7
Dependent Claim
69 words
A composition according to any one of the aforementioned Claims, characterized in that it comprises : (i) from 5 to 30% by weight of a peroxide compound; (ii) said water-soluble manganese polyol complex bleach catalyst in an amount corresponding to 0.0005 to about 0.5% by weight of manganese; (iii) from 0-50% by weight of a surface-active material; and (iv) from 0 to 80% by weight of a builder material.
Claim 8
Dependent Claim
58 words
A bleaching and cleaning process employing a peroxy compound bleaching agent, characterized in that said bleaching agent is activated by a catalytic amount of a water-soluble complex of manganese (II), (III) or (IV) or mixtures thereof with a ligand, wherein said ligand is a non-carboxylate polyhydroxy compound having at least three consecutive C-OH groups in its molecular structure.
Claim 9
Dependent Claim
28 words
A process according to Claim 8, characterized in that said non-carboxylate polyhydroxy compound ligand contains at least 5 consecutive carbon atoms having at least 4 consecutive hydroxyl groups.
Claim 10
Dependent Claim
26 words
A process according to Claim 9, characterized in that said ligand contains from 5 to 8 consecutive carbon atoms having 4 to 8 consecutive hydroxyl groups.
Claim 11
Dependent Claim
13 words
A process according to Claim 10, characterized in that the ligand is sorbitol.
Claim 12
Dependent Claim
31 words
A process according to any of the above Claims 8-11, characterized in that the molar ratio of ligand to manganese in the manganese complex bleach catalyst is from 1:1 to 100:1.
Claim 13
Dependent Claim
38 words
A process according to any of the above claims 8-12, characterized in that the manganese complex catalyst is used in the aqueous bleaching/cleaning solution at a level within a range of from 0.05 to 5 ppm of manganese.
Claim 14
Dependent Claim
19 words
A process according to claim 13, characterized in that the level of manganese is from 0.5 to 2.5 ppm.
References Cited (Backward Citations)
No citation records indexed.
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