US4338210A
Expired / Lapsed
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Bleach composition
Assignee: Lever Brothers Co
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Filing: 1981-02-24
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Granted: 1982-07-06
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Expires: 2001-02-24
Abstract
Abstract A low temperature bleach system comprises a peracid percursor system and bromide ions. The bromide ions may be supplied by sodium bromide. A theoretical peracid to bromide equivalent ratio between 2:1 and 1:2 is preferred, but dye transfer and hygiene benefits are possible with a ratio up to 1:32. The precursor system is typically diphthaloyl peroxide or sodium perborate plus tetraacetyl ethylenediamine (TAED). If the perborate is in excess, a scavenger such as catalase should be included. The system may be used as such or incorporated in a conventional detergent base.
Inventors
- 👤 Anthony H. Clements
- 👤 Arthur G. Leigh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:21
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3902; C11D3/3905; C11D3/3932; C11D3/3945
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
88 words
A bleach composition consisting essentially of (a) a peracid precursor compound which on hydrolysis or perhydrolysis forms an organic peracid, in an amount equivalent to 0.1-40 parts by weight of organic peracid produced therefrom, and (b) 0.1-40 parts by weight of a water soluble bromide salt which delivers bromide ions in aqueous media, the theoretical molar equivalent ratio of said organic peracid to said bromide salt being not more than 5:1, in the substantial absence of aldehydes, ketones and materials which yield aldehydes or ketones in aqueous solution.
Claim 2
Dependent Claim
88 words
A bleach composition consisting essentially of (a) a peracid precursor compound which on hydrolysis or perhydrolysis forms an organic peracid, in an amount equivalent to 0.1-40 parts by weight of organic peracid produced therefrom, and (b) 0.1-40 parts by weight of a water soluble bromide salt which delivers bromide ions in aqueous media, the theoretical molar equivalent ratio of said organic peracid to said bromide salt being not more than 5:1, in the substantial absence of aldehydes, ketones and materials which yield aldehydes or ketones in aqueous solution.
Claim 3
Dependent Claim
19 words
A bleach composition according to claim 1 wherein said molar equivalent ratio is between about 1:3 and about 1:32.
Claim 4
Dependent Claim
22 words
A bleach composition according to claim 1 wherein said precursor is selected from the group consisting of benzoyl peroxide and diphthaloyl peroxide.
Claim 5
Dependent Claim
19 words
A bleach composition according to claim 1 wherein said molar equivalent ratio is between bout 5:1 and about 1:3.
Claim 6
Dependent Claim
19 words
A bleach composition according to claim 4 wherein said molar equivalent ratio is between about 2:1 and about 1:2.
Claim 7
Dependent Claim
49 words
A bleach composition according to claim 1, wherein said precursor is a mixture of an inorganic persalt of the peroxyhydrate type which yields hydrogen peroxide in solution and an organic activator for said presalt selected from the group consisting of esters, acylamides, acylazoles, acylmides, triacyl cyanurvates and mixtures thereof.
Claim 8
Dependent Claim
10 words
A bleach composition according to claim 6, additionally including catalase.
Claim 9
Dependent Claim
14 words
A bleach composition according to claim 6 wherein said persalt bleach is sodium perborate.
Claim 10
Dependent Claim
25 words
A bleach composition according to claim 6 wherein said organic activator is selected from the group consisting of: N,N,N',N' tetraacetylethylenediamine, tetraacetylglycoluril and N,N' diacetylacetoxymethyl malonamide.
Claim 11
Dependent Claim
22 words
A bleach composition according to claim 6 wherein said organic activator is present in at least the stoichiometric ratio to the persalt.
Claim 12
Dependent Claim
143 words
A bleach composition consisting essentially of (a) A peracid precursor compound which on hydrolysis or perhydrolysis forms an organic peracid, in an amount equivalent to 0.5-35 parts by weight of the organic peracid produced therefrom, (b) 0.5-35 parts by weight of a water soluble bromide salt which delivers bromide ions in aqueous media, (c) 5-35 parts by weight of a water soluble organic detergent selected from the group consisting of organic synthetic sulphonate or sulphate anionic detergents, nonionic detergents, alkalimetaal soaps of C 8 -C 22 fatty acids, and mixtures thereof, (d) 10-60 parts of builders from the group consisting of bicarbonates, carbonates, borates or silicates of the alkali metals, the alkali metal ortho-, meta-, pyro- and tripolyphosphates, and insoluble sodium aluminosilicates, and mixtures thereof, said compositions being substantially free from aldehydes, ketones and materials which yield aldehydes or ketones in aqueuos solution.
Claim 13
Dependent Claim
143 words
A bleach composition consisting essentially of (a) A peracid precursor compound which on hydrolysis or perhydrolysis forms an organic peracid, in an amount equivalent to 0.5-35 parts by weight of the organic peracid produced therefrom, (b) 0.5-35 parts by weight of a water soluble bromide salt which delivers bromide ions in aqueous media, (c) 5-35 parts by weight of a water soluble organic detergent selected from the group consisting of organic synthetic sulphonate or sulphate anionic detergents, nonionic detergents, alkalimetaal soaps of C 8 -C 22 fatty acids, and mixtures thereof, (d) 10-60 parts of builders from the group consisting of bicarbonates, carbonates, borates or silicates of the alkali metals, the alkali metal ortho-, meta-, pyro- and tripolyphosphates, and insoluble sodium aluminosilicates, and mixtures thereof, said compositions being substantially free from aldehydes, ketones and materials which yield aldehydes or ketones in aqueuos solution.
Claim 14
Dependent Claim
15 words
A bleach composition according to claim 11, wherein said precursor is benzoylperoxide or diphthaloyl peroxide.
Claim 15
Dependent Claim
48 words
A bleach composition according to claim 11, wherein said precursor is a mixture of an inorganic persalt of the peroxydydrate type which yields hydrogen peroxide in solution, and an organic activator for said persalt, selected from the group consisting of esters, acylamides, acylazoles, acylamides, triacylcyanurates and mixtures thereof.
Claim 16
Dependent Claim
10 words
A bleach composition according to claim 13, additionally including catalase.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-07-05 | 1986-01-04 | 1986-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-07-05 | 1990-01-04 | 1990-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-07-05 | 1994-01-04 | 1994-07-06 | $7700.00 | Window Closed / Lapsed |