US4529534A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Peroxyacid bleach compositions
Assignee: Procter and Gamble Co
•
Filing: 1982-08-19
•
Granted: 1985-07-16
•
Expires: 2002-08-19
Abstract
Abstract Surface active peroxyacid bleaches (e.g., perlauric acid) are protected against decomposition caused by presence of magnesium ions in aqueous solutions of said bleaches, by the presence of certain aminophosphonic acid and aminocarboxylic acid chelating agents.
Inventors
- 👤 David L. Richardson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:17
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3902; C11D3/3937; C11D3/394; C11D3/3945
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
73 words
A dry granular bleaching composition comprising: A. from about 0.8% to about 25% of a surface active peroxyacid bleach of the formula R.sub.1 CO.sub.3 H wherein R 1 is an alkyl group containing from about 7 to about 21 carbon atoms; and B. from about 0.1% to about 2% of an organic chelating agent selected from the group consisting of aminotri(methylphosphonic acid), ethylenediaminetetra(methylphosphonic acid), diethylenetriamine penta(methylphosphonic acid and the alkali metal salts thereof.
Claim 2
Dependent Claim
73 words
A dry granular bleaching composition comprising: A. from about 0.8% to about 25% of a surface active peroxyacid bleach of the formula R.sub.1 CO.sub.3 H wherein R 1 is an alkyl group containing from about 7 to about 21 carbon atoms; and B. from about 0.1% to about 2% of an organic chelating agent selected from the group consisting of aminotri(methylphosphonic acid), ethylenediaminetetra(methylphosphonic acid), diethylenetriamine penta(methylphosphonic acid and the alkali metal salts thereof.
Claim 3
Dependent Claim
30 words
The composition of claim 1 wherein the surface active peroxyacid bleach is in the form of a urea adduct which contains from about 20% to about 25% of said bleach.
Claim 4
Dependent Claim
29 words
The composition of claim 2 wherein the weight ratio of organic chelator to available oxygen provided by the surface active peroxyacid bleach is from about 0.025:1 to about 20:1.
Claim 5
Dependent Claim
31 words
The composition of claims 2 or 3 wherein the weight ratio of organic chelator to available oxygen provided by the surface active peroxyacid bleach is from about 0.4:1 to about 2:1.
Claim 6
Dependent Claim
17 words
The composition of claim 4 which contains from about 0.5% to about 30% of an anionic surfactant.
Claim 7
Dependent Claim
19 words
The composition of claim 5 which contains from about 0.5% to about 75% of an inorganic polyphosphate detergency builder.
Claim 8
Independent Claim
174 words
A method of bleaching fabrics comprising the step of contacting said fabrics at a temperature of from about 15° C. to about 52° C. with an aqueous solution comprising: A. from about 1 ppm to about 20 ppm of available oxygen from a surface active peroxyacid bleach of the formula R.sub.1 CO.sub.3 H wherein R 1 is an alkyl group containing from about 7 to about 21 carbon atoms; and B. an amount of an organic chelator which is in a weight ratio of from about 0.025:1 to about 20:1 to said available oxygen, the said chelator being selected from the group consisting of aminotri(methylphosphonic acid), ethylenediaminetetra(methylphosphonic acid), diethylenetriamine penta(methylphosphonic acid and the alkali metal salts thereof. C. at least about 150 ppm anionic surfactant; D. from about 17 ppm to about 340 ppm magnesium hardness ion; and E. an amount of inorganic polyphosphate builder which is from 0.3 to about 3 times the theoretical stoichiometric equivalent of the total amount of magnesium ion and any calcium which may be present in said solution.
Claim 9
Independent Claim
174 words
A method of bleaching fabrics comprising the step of contacting said fabrics at a temperature of from about 15° C. to about 52° C. with an aqueous solution comprising: A. from about 1 ppm to about 20 ppm of available oxygen from a surface active peroxyacid bleach of the formula R.sub.1 CO.sub.3 H wherein R 1 is an alkyl group containing from about 7 to about 21 carbon atoms; and B. an amount of an organic chelator which is in a weight ratio of from about 0.025:1 to about 20:1 to said available oxygen, the said chelator being selected from the group consisting of aminotri(methylphosphonic acid), ethylenediaminetetra(methylphosphonic acid), diethylenetriamine penta(methylphosphonic acid and the alkali metal salts thereof. C. at least about 150 ppm anionic surfactant; D. from about 17 ppm to about 340 ppm magnesium hardness ion; and E. an amount of inorganic polyphosphate builder which is from 0.3 to about 3 times the theoretical stoichiometric equivalent of the total amount of magnesium ion and any calcium which may be present in said solution.
Claim 10
Dependent Claim
21 words
The method of claim 7 wherein the active bleach is one wherein R 1 is from about 9 to about 13.
Claim 11
Dependent Claim
29 words
The method of claim 8 wherein the weight ratio of organic chelator to available oxygen provided by the surface active peroxyacid bleach is from about 0.4:1 to about 2:1.
Claim 12
Dependent Claim
20 words
The method of claim 9 wherein the amount of anionic surfactant is from about 200 ppm to about 400 ppm.
Claim 13
Dependent Claim
13 words
The method of claim 10 wherein the surface active bleach is perlauric acid.
References Cited (Backward Citations)
US2347434A
Cited
US3167513A
Cited
US3414593A
Cited
US3336221A
Cited
US3542918A
Cited
US3645670A
Cited
GB1355855A
Cited
GB1392284A
Cited
US3766078A
Cited
US3740187A
Cited
US3860391A
Cited
GB1387167A
Cited
GB1456591A
Cited
US4013581A
Cited
US4051058A
Cited
US4111826A
Cited
US4128495A
Cited
US4100095A
Cited
EP0003861A1
Cited
US4279769A
Cited
US4304762A
Cited
US4225452A
Cited
US4294575A
Cited
US4259200A
Cited
US4244884A
Cited
US4325828A
Cited
EP0037146A1
Cited
EP0040038A2
Cited
EP0047015A1
Cited
US4422950A
Cited
US4417994A
Cited
US4391723A
Cited
US4430243A
Cited
US4391725A
Cited
US4473507A
Cited
US4378300A
Cited
US4450089A
Cited
US4455249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-07-15 | 1989-01-14 | 1989-07-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-07-15 | 1993-01-14 | 1993-07-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-07-15 | 1997-01-14 | 1997-07-16 | $7700.00 | Window Closed / Lapsed |