Patent US4325828A successfully refreshed from Google Patents.
US4325828A
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US
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Detergent bleach compositions
Assignee: Lever Brothers Co
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Filing: 1981-03-19
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Granted: 1982-04-20
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Expires: 2001-03-19
Abstract
Abstract A solid detergent bleach composition adapted for use at substantially any washing temperature, comprising essentially a detergent active compound and a synergistic mixture of a solid organic peroxy acid compound e.g. diperoxyazelaic acid, an inorganic peroxy compound e.g. sodium perborate and a stabilizing sequestering agent. The composition which is preferably presented in the form of a particulate product, shows improved bleaching effect at substantially all washing temperatures. It has also advantages over compositions comprising bleaching activators in that it does not suffer from problems of in situ peroxy acid generation.
Inventors
- 👤 Dennis Postlethwaite
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:42
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/39; C11D3/3902; C11D3/3937; C11D3/394; C11D3/3945
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
223 words
Solid detergent bleach composition having an improved bleaching effect at substantially all washing temperatures, consisting essentially of: (a) from 3 to 40% by weight of a detergent selected from the group consisting of anionic, nonionic, cationic, and amphoteric detergent and mixtures thereof; (b) from 1 to 25% by weight of a solid organic peroxyacid compound, having a melting point of at least 50° C.; (c) from 2 to 40% by weight of an inorganic peroxy compound generating hydrogen peroxide in solution, and (d) from 0.05 to 5% by weight of a stabilizing sequestering agent selected from the group consisting of: (i) a compound of the general formula: ##STR10## wherein n is an integer from 0 to 4 and X is H or an alkali metal, alkaline earth metal or ammonium cation; (ii) a compound of the general formula: ##STR11## wherein n is an integer from 0 to 2; X is H or an alkali metal, alkaline earth metal or ammonium cation; Y=CH 2 COOX or CH 2 PO 3 X 2 Z=CH 2 COOX or CH 2 PO 3 X 2 (X is H or alkali metal, alkaline earth metal or ammonium cation; (iii) a compound of the general formula: ##STR12## wherein n is 1-3, and X is H, or an alkali metal, alkaline earth metal or ammonium cation; and (iv) mixtures thereof.
Claim 2
Dependent Claim
223 words
Solid detergent bleach composition having an improved bleaching effect at substantially all washing temperatures, consisting essentially of: (a) from 3 to 40% by weight of a detergent selected from the group consisting of anionic, nonionic, cationic, and amphoteric detergent and mixtures thereof; (b) from 1 to 25% by weight of a solid organic peroxyacid compound, having a melting point of at least 50° C.; (c) from 2 to 40% by weight of an inorganic peroxy compound generating hydrogen peroxide in solution, and (d) from 0.05 to 5% by weight of a stabilizing sequestering agent selected from the group consisting of: (i) a compound of the general formula: ##STR10## wherein n is an integer from 0 to 4 and X is H or an alkali metal, alkaline earth metal or ammonium cation; (ii) a compound of the general formula: ##STR11## wherein n is an integer from 0 to 2; X is H or an alkali metal, alkaline earth metal or ammonium cation; Y=CH 2 COOX or CH 2 PO 3 X 2 Z=CH 2 COOX or CH 2 PO 3 X 2 (X is H or alkali metal, alkaline earth metal or ammonium cation; (iii) a compound of the general formula: ##STR12## wherein n is 1-3, and X is H, or an alkali metal, alkaline earth metal or ammonium cation; and (iv) mixtures thereof.
Claim 3
Dependent Claim
54 words
Solid detergent bleach composition according to claim 1, which has: (a) 10 to 35% by weight of said detergent; (b) 2 to 10% by weight of said solid organic peroxyacid compound; (c) 5 to 30% by weight of said inorganic peroxy compound; and (d) 0.1 to 2% by weight of said stabilizing sequestering agent.
Claim 4
Dependent Claim
15 words
Solid detergent bleach composition according to claim 1, wherein the peroxyacid compound is di-peroxyazelaic acid.
Claim 5
Dependent Claim
16 words
Solid detergent bleach composition according to claim 1, wherein said peroxy acid compound is monoperoxyphthalic acid.
Claim 6
Dependent Claim
16 words
Solid detergent bleach composition according to claim 1, wherein said peroxy acid compound is diperoxyisophthalic acid.
References Cited (Backward Citations)
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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) | 1985-04-19 | 1985-10-19 | 1986-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-19 | 1989-10-19 | 1990-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-19 | 1993-10-19 | 1994-04-20 | $7700.00 | Window Closed / Lapsed |