US4120652A
Expired / Lapsed
US
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Aromatic sulfonyl azides as peroxygen activators
Assignee: FMC Corp
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Filing: 1977-10-03
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Granted: 1978-10-17
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Expires: 1997-10-03
Abstract
Abstract A process for the low temperature removal of soil and/or stains from fabrics by immersing the fabrics in a peroxygen bleach bath containing as a peroxygen activator an aromatic sulfonyl azide of the formula: R--(SO.sub.2 N.sub.3).sub.n wherein R is an aromatic ring selected from the class consisting of phenyl, naphthyl and heterocyclic of 1 to 2 rings each containing 5 to 6 members of which 1 to 2 are nitrogen or sulfur atoms said aromatic ring optionally bearing 1 to 3 substituents selected from the class consisting of nitro, alkyl of 1 to 6 carbon atoms, lower fluorinated alkyl alkoxy of 1 to 6 carbon atoms, aliphatic carboxamido of 1 to 6 carbon atoms, benzamido and halogen and n is an integer of 1 to 2, it being provided that there are at least 5 carbon atoms per azide function. Also described are dry blend compositions containing bleach bath components.
Inventors
- 👤 Fred R. Scholer
- 👤 John H. Blumbergs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:11
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3902; C11D3/3905; C11D3/3907; C11D3/3917
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
154 words
A process for the low temperature bleaching of stained or soiled fabrics which comprises treating them with an aqueous peroxygen bleaching solution having a pH of about 6 to about 12 and containing as a peroxygen activator therefor, an effective amount of an aromatic sulfonyl azide having the formula: R--(SO.sub.2 N.sub.3).sub.n wherein R is an aromatic ring selected from the group consisting of phenyl, naphthyl and heterocyclic of 1 or 2 rings each containing 5 to 6 members of which 1 or 2 are nitrogen or sulfur atoms said aromatic ring optionally bearing 1 to 3 substituents selected from the group consisting of nitro, alkyl of 1 to 6 carbon atoms, lower fluorinated alkyl alkoxy of 1 to 6 carbon atoms, aliphatic carboxamido of 1 to 6 carbon atoms, benzamido and halogen and n is an integer 1 or 2, it being provided that there are at least 5 carbon atoms per azide function.
Claim 2
Dependent Claim
154 words
A process for the low temperature bleaching of stained or soiled fabrics which comprises treating them with an aqueous peroxygen bleaching solution having a pH of about 6 to about 12 and containing as a peroxygen activator therefor, an effective amount of an aromatic sulfonyl azide having the formula: R--(SO.sub.2 N.sub.3).sub.n wherein R is an aromatic ring selected from the group consisting of phenyl, naphthyl and heterocyclic of 1 or 2 rings each containing 5 to 6 members of which 1 or 2 are nitrogen or sulfur atoms said aromatic ring optionally bearing 1 to 3 substituents selected from the group consisting of nitro, alkyl of 1 to 6 carbon atoms, lower fluorinated alkyl alkoxy of 1 to 6 carbon atoms, aliphatic carboxamido of 1 to 6 carbon atoms, benzamido and halogen and n is an integer 1 or 2, it being provided that there are at least 5 carbon atoms per azide function.
Claim 3
Dependent Claim
21 words
The process according to claim 1 wherein the mole ratio of peroxygen to activator is from about 20:1 to about 1:3.
Claim 4
Dependent Claim
13 words
The process according to claim 2 wherein the peroxygen is sodium perborate tetrahydrate.
Claim 5
Dependent Claim
26 words
The process according to claim 2 wherein the quantity of peroxygen is sufficient to provide from about 2 ppm to about 2000 ppm of active oxygen.
Claim 6
Dependent Claim
14 words
The process according to claim 1 wherein the bleach solution contains a detergent agent.
Claim 7
Dependent Claim
21 words
The process according to claim 1 wherein the pH of the bleach solution is maintained by means of a buffering agent.
Claim 8
Dependent Claim
29 words
The process according to claim 1 wherein the activator is selected from the group consisting of p-methoxybenzenesulfonyl azide, 2,6-dichlorobenzenesulfonyl azide, o-nitrobenzenesulfonyl azide, 2,4,6-trimethylbenzene-1,3-disulfonyl azide, p-acetamidobenzenesulfonyl azide, and m-trifluoromethylbenzenesulfonyl azide.
Claim 9
Dependent Claim
127 words
A bleaching composition consisting essentially of a peroxygen bleaching compound and as a peroxygen activator, an aromatic sulfonyl azide of the formula: R--(SO.sub.2 N.sub.3).sub.n wherein R is an aromatic ring selected from the group consisting of phenyl, naphthyl and heterocyclic of 1 or 2 rings each containing 5 to 6 members of which 1 or 2 are nitrogen or sulfur atoms said aromatic ring optionally bearing 1 to 3 substituents selected from the group consisting of nitro, alkyl of 1 to 6 carbon atoms, lower fluorinated alkyl alkoxy of 1 to 6 carbon atoms, aliphatic carboxamido of 1 to 6 carbon atoms, benzamido and halogen and n is an integer 1 or 2, it being provided that there are at least 5 carbon atoms per azide function.
Claim 10
Dependent Claim
127 words
A bleaching composition consisting essentially of a peroxygen bleaching compound and as a peroxygen activator, an aromatic sulfonyl azide of the formula: R--(SO.sub.2 N.sub.3).sub.n wherein R is an aromatic ring selected from the group consisting of phenyl, naphthyl and heterocyclic of 1 or 2 rings each containing 5 to 6 members of which 1 or 2 are nitrogen or sulfur atoms said aromatic ring optionally bearing 1 to 3 substituents selected from the group consisting of nitro, alkyl of 1 to 6 carbon atoms, lower fluorinated alkyl alkoxy of 1 to 6 carbon atoms, aliphatic carboxamido of 1 to 6 carbon atoms, benzamido and halogen and n is an integer 1 or 2, it being provided that there are at least 5 carbon atoms per azide function.
Claim 11
Dependent Claim
14 words
The composition according to claim 8 wherein the peroxygen compound is sodium perborate tetrahydrate.
Claim 12
Dependent Claim
16 words
A detergent composition consisting essentially of a detergent agent and the composition defined in claim 8.
Claim 13
Dependent Claim
29 words
The bleaching composition of claim 8 wherein the activator is selected from the group consisting of p-methoxybenzenesulfonyl azide, 2,6-dichlorobenzenesulfonyl azide, o-nitrobenzenesulfonyl azide, 2,4,6-trimethylbenzene-1,3-disulfonyl azide, p-acetamidobenzenesulfonyl azide, and m-trifluoromethylbenzenesulfonyl azide.
Claim 14
Dependent Claim
144 words
A bleaching composition consisting essentially of a peroxygen bleaching compound, an aromatic sulfonyl azide activator of the formula: R--(SO.sub.2 N.sub.3).sub.n wherein R is an aromatic ring selected from the group consisting of phenyl, naphthyl and heterocyclic of 1 or 2 rings each containing 5 to 6 members of which 1 or 2 are nitrogen or sulfur atoms said aromatic ring optionally bearing 1 to 3 substituents selected from the group consisting of nitro, alkyl of 1 to 6 carbon atoms, lower fluorinated alkyl alkoxy of 1 to 6 carbon atoms, aliphatic carboxamido of 1 to 6 carbon atoms, benzamido and halogen and n is an integer 1 or 2, it being provided that there are at least 5 carbon atoms per azide function and sufficient buffering agent to maintain a pH of about 6 to 12 when the bleaching composition is dissolved in water.
Claim 15
Dependent Claim
144 words
A bleaching composition consisting essentially of a peroxygen bleaching compound, an aromatic sulfonyl azide activator of the formula: R--(SO.sub.2 N.sub.3).sub.n wherein R is an aromatic ring selected from the group consisting of phenyl, naphthyl and heterocyclic of 1 or 2 rings each containing 5 to 6 members of which 1 or 2 are nitrogen or sulfur atoms said aromatic ring optionally bearing 1 to 3 substituents selected from the group consisting of nitro, alkyl of 1 to 6 carbon atoms, lower fluorinated alkyl alkoxy of 1 to 6 carbon atoms, aliphatic carboxamido of 1 to 6 carbon atoms, benzamido and halogen and n is an integer 1 or 2, it being provided that there are at least 5 carbon atoms per azide function and sufficient buffering agent to maintain a pH of about 6 to 12 when the bleaching composition is dissolved in water.
Claim 16
Dependent Claim
21 words
The bleaching composition of claim 12 wherein the mole ratio of peroxygen to activator is from about 20:1 to about 1:3.
Claim 17
Dependent Claim
49 words
A detergent composition consisting essentially of (a) from about 5% to about 50% by weight of the bleaching composition of claim 12; (b) from about 5% to about 50% by weight of a detergent agent; and (c) from about 1% to about 60% by weight of a detergency builder.
Claim 18
Dependent Claim
36 words
The detergent composition of claim 14 wherein the peroxygen is sodium perborate tetrahydrate and the activator is selected from the group consisting of p-methoxybenzenesulfonyl azide, 2,6-dichlorobenzenesulfonyl azide, o-nitrobenzenesulfonyl azide, 2,4,6-trimethylbenzene-1,3-disulfonyl azide, p-acetamidobenzenesulfonyl azide, and m-trifluoromethylbenzenesulfonyl azide.
References Cited (Backward Citations)
US3982892A
Cited
US4025453A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-16 | 1982-04-17 | 1982-10-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-16 | 1986-04-17 | 1986-10-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-16 | 1990-04-17 | 1990-10-17 | $7700.00 | Window Closed / Lapsed |