Patent US4126573A successfully refreshed from Google Patents.
US4126573A
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US
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Peroxyacid bleach compositions having increased solubility
Assignee: Procter and Gamble Co
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Filing: 1976-08-27
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Granted: 1978-11-21
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Expires: 1996-08-27
Abstract
Abstract Improved peroxyacid bleaching particles comprising an inner core of a solid peroxyacid compound and as a coating a surfactant compound. Methods of making and using such particles and compositions containing such particles are also described.
Inventors
- 👤 James P. Johnston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:27
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3945; C11D17/00; C11D17/0039
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
90 words
Peroxyacid bleaching particles consisting essentially of: (a) an inner core of a solid peroxyacid compound selected from the group consisting of diperoxyazelaic acid and diperoxydodecanedioic acid, and (b) as a coating a water-soluble surfactant compound selected from the group consisting of organic anionic sulfate compounds, anionic sulfonate compounds, semipolar amine oxides, semipolar phosphine oxides and zwitterionic compounds, said surfactant being present in an amount of from about 5% to about 100% of said peroxyacid and the coated particles having a particle diameter of from about 1 to about 150 microns.
Claim 2
Dependent Claim
90 words
Peroxyacid bleaching particles consisting essentially of: (a) an inner core of a solid peroxyacid compound selected from the group consisting of diperoxyazelaic acid and diperoxydodecanedioic acid, and (b) as a coating a water-soluble surfactant compound selected from the group consisting of organic anionic sulfate compounds, anionic sulfonate compounds, semipolar amine oxides, semipolar phosphine oxides and zwitterionic compounds, said surfactant being present in an amount of from about 5% to about 100% of said peroxyacid and the coated particles having a particle diameter of from about 1 to about 150 microns.
Claim 3
Dependent Claim
38 words
The composition of claim 1 wherein the water-soluble surfactant (b) is selected from the group consisting of alkali metals salts of alkyl benzene sulfonates and alkyl sulfonates having alkyl groups from about 9 to about 22 carbon atoms.
Claim 4
Dependent Claim
18 words
The composition of claim 2 wherein the water-soluble surfactant (b) is sodium alkyl (C 13 ) benzene sulfonate.
Claim 5
Dependent Claim
13 words
The composition of claim 3 wherein the solid peroxyacid (a) is diperoxydodecanedioic acid.
Claim 6
Dependent Claim
81 words
The composition of claim 1 additionally comprising from about 100% to about 200% of a moisture liberating exotherm control agent based on the weight of the peroxyacid compound, said exotherm control agent being selected from the group consisting of magnesium sulfate .7H 2 O, magnesium formate dihydrate, calcium sulfate dihydrate, calcium lactate hydrate, calcium sodium sulfate dihydrate, hydrated sodium aluminium sulfate, hydrated potassium aluminum sulfate, hydrated ammonium aluminum sulfate, hydrated aluminum sulfate, boric acid, malic acid, maleic acid and mixtures thereof.
Claim 7
Dependent Claim
15 words
The composition of claim 5 wherein the moisture liberating exotherm control agent is boric acid.
Claim 8
Dependent Claim
38 words
The composition of claim 6 wherein the water-soluble surfactant (b) is selected from the group consisting of alkali metal salts of alkyl benzene sulfonates and alkyl sulfonates having alkyl groups from about 9 to about 22 carbon atoms.
Claim 9
Dependent Claim
18 words
The composition of claim 7 wherein the water-soluble surfactant (b) is sodium alkyl (C 13 ) benzene sulfonate.
Claim 10
Dependent Claim
13 words
The composition of claim 8 wherein the solid peroxyacid (a) is diperoxydodecanedioic acid.
Claim 11
Independent Claim
118 words
A method of bleaching fabrics comprising contacting fabrics to be bleached with a water solution containing peroxyacid bleaching particles consisting essentially of: (a) an inner core of a solid peroxyacid compound selected from the group consisting of diperoxyazelaic acid and diperoxydodecanedioic acid, and (b) as a coating a water-soluble surfactant compound selected from the group consisting of anionic sulfate compounds, anionic sulfonate compounds, semipolar amine oxides, semipolar phosphine oxides and zwitterionic compounds, said surfactant being present in an amount of from about 5% to about 100% of said peroxyacid and the coated particles having a particle diameter of from about 1 to about 150 microns, sufficient to provide from about 1 ppm to about 100 ppm available oxygen.
Claim 12
Independent Claim
118 words
A method of bleaching fabrics comprising contacting fabrics to be bleached with a water solution containing peroxyacid bleaching particles consisting essentially of: (a) an inner core of a solid peroxyacid compound selected from the group consisting of diperoxyazelaic acid and diperoxydodecanedioic acid, and (b) as a coating a water-soluble surfactant compound selected from the group consisting of anionic sulfate compounds, anionic sulfonate compounds, semipolar amine oxides, semipolar phosphine oxides and zwitterionic compounds, said surfactant being present in an amount of from about 5% to about 100% of said peroxyacid and the coated particles having a particle diameter of from about 1 to about 150 microns, sufficient to provide from about 1 ppm to about 100 ppm available oxygen.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-11-20 | 1982-05-22 | 1982-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-11-20 | 1986-05-22 | 1986-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-11-20 | 1990-05-22 | 1990-11-21 | $7700.00 | Window Closed / Lapsed |