US4167487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aromatic activator
Assignee: Colgate Palmolive Co
•
Filing: 1974-06-03
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Granted: 1979-09-11
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Expires: 1994-06-03
Abstract
Abstract N-benzoyl 2-methyl-imidazole as an activator for peroxygen compounds for bleaching.
Inventors
- 👤 Frederick W. Gray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 21:37
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3902; C11D3/3905; C11D3/3907; C11D3/3917; C11D3/392
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
52 words
A method for activating an inorganic, water soluble peroxygen compound comprising dissolving said peroxygen compound in water and contacting the dissolved peroxygen compound with N-benzoyl 2-methylimidazole or N-m-chlorobenzoyl 2-methylimidazole, in an amount sufficient to provide a mol ratio of active oxygen of said peroxygen compound to activator of about 0.5:1 to 16:1.
Claim 2
Independent Claim
52 words
A method for activating an inorganic, water soluble peroxygen compound comprising dissolving said peroxygen compound in water and contacting the dissolved peroxygen compound with N-benzoyl 2-methylimidazole or N-m-chlorobenzoyl 2-methylimidazole, in an amount sufficient to provide a mol ratio of active oxygen of said peroxygen compound to activator of about 0.5:1 to 16:1.
Claim 3
Dependent Claim
23 words
A method as in claim 1 in which said peroxygen compound is selected from the group consisting of sodium perborate and sodium percarbonate.
Claim 4
Dependent Claim
42 words
A composition for the cleaning of fabrics consisting essentially of an inorganic, water soluble peroxygen compound and as an activator therefor N-benzoyl 2-methylimidazole or N-m-chlorobenzoyl 2-methylimidazole, the mol ratio of active oxygen of said peroxygen compound to activator being 0.5:1 to 16:1.
Claim 5
Dependent Claim
42 words
A composition for the cleaning of fabrics consisting essentially of an inorganic, water soluble peroxygen compound and as an activator therefor N-benzoyl 2-methylimidazole or N-m-chlorobenzoyl 2-methylimidazole, the mol ratio of active oxygen of said peroxygen compound to activator being 0.5:1 to 16:1.
Claim 6
Dependent Claim
23 words
A composition as in claim 3 having a pH, on dissolution in water, at 0.15% concentration, in the range of 8 to 10.
Claim 7
Dependent Claim
9 words
A composition as in claim 4 containing trisodium citrate.
Claim 8
Dependent Claim
9 words
A composition as in claim 4 containing trisodium nitrilotriacetate.
Claim 9
Dependent Claim
14 words
A composition as in claim 4 containing tetrasodium salt of ethylene diamine tetraacetic acid.
Claim 10
Dependent Claim
12 words
A composition as defined in claim 3 wherein said activator is N-benzoyl-2-methylimidazole.
Claim 11
Dependent Claim
12 words
A composition as defined in claim 3 wherein said activator is N-m-chlorobenzoyl-2-methylimidazole.
Claim 12
Dependent Claim
16 words
A composition as defined in claim 3 wherein said mol ratio is at least about 2:1.
Claim 13
Dependent Claim
16 words
A process which comprises contacting fabrics in an aqueous medium with the composition of claim 3.
Claim 14
Dependent Claim
36 words
A bleaching composition consisting essentially of a hydrogen peroxide releasing inorganic persalt, and an activating amount of 1-benzoyl-2-methylimidazole, said activating amount being about 1 to 2 equivalents for each equivalent of the hydrogen peroxide releasing compound.
Claim 15
Dependent Claim
36 words
A bleaching composition consisting essentially of a hydrogen peroxide releasing inorganic persalt, and an activating amount of 1-benzoyl-2-methylimidazole, said activating amount being about 1 to 2 equivalents for each equivalent of the hydrogen peroxide releasing compound.
Claim 16
Dependent Claim
12 words
The composition of claim 12 wherein said persalt is an alkali-metal persalt.
Claim 17
Dependent Claim
18 words
The composition of claim 13 wherein the mol ratio of the imidazole to the persalt is about 1:1.
Claim 18
Dependent Claim
10 words
The composition of claim 12 comprising the persalt sodium perborate.
Claim 19
Dependent Claim
20 words
A process for bleaching fabrics which comprises contacting said fabrics in an aqueous medium with the composition of claim 12.
Claim 20
Dependent Claim
57 words
A bleaching composition consisting essentially of hydrogen peroxide or a hydrogen peroxide releasing compound selected from the group consisting of organic peroxides and inorganic persalts; and an activating amount of 1-benzoyl-2-methylimidazole, the activating amount of the 1-benzoyl-2-methylimidazole in the composition being at least one equivalent of the 1-benzoyl-2-methylimidazole for each equivalent of the hydrogen peroxide releasing compound.
Claim 21
Dependent Claim
57 words
A bleaching composition consisting essentially of hydrogen peroxide or a hydrogen peroxide releasing compound selected from the group consisting of organic peroxides and inorganic persalts; and an activating amount of 1-benzoyl-2-methylimidazole, the activating amount of the 1-benzoyl-2-methylimidazole in the composition being at least one equivalent of the 1-benzoyl-2-methylimidazole for each equivalent of the hydrogen peroxide releasing compound.
Claim 22
Dependent Claim
15 words
The composition of claim 17 wherein the hydrogen peroxide releasing compound is an alkali-metal persalt.
Claim 23
Dependent Claim
18 words
The composition of claim 18 wherein the mole ratio of the imidazole to the persalt is about 1:1.
Claim 24
Dependent Claim
10 words
The composition of claim 17 comprising the persalt sodium perborate.
Claim 25
Dependent Claim
20 words
A process for bleaching fabrics which comprises contacting said fabrics in an aqueous medium with the composition of claim 17.
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) | 1982-09-10 | 1983-03-12 | 1983-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-09-10 | 1987-03-12 | 1987-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-09-10 | 1991-03-12 | 1991-09-11 | $7700.00 | Window Closed / Lapsed |