US4919845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phosphate-free detergent having a reduced tendency towards incrustation
Assignee: Henkel AG and Co KGaA
•
Filing: 1989-07-07
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Granted: 1990-04-24
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Expires: 2009-07-07
Abstract
Abstract A detergent composition containing by weight (a) from 5 to 35% of an anionic or nonionic surfactant, (b) from 10 to 40% of finely crystalline zeolite, (c) from 4 to 20% of alkali metal silicate or carbonate and from 0.1 to 5% of (d) aminoalkanephosphonate or (d2) copolymer of (meth)acrylic acid and maleic acid and (e) from 5 to 80% of other detergent constituents is considerably improved in regard to its incrustation-inhibiting properties if it additionally contains (f) from 0.05 to 1% (based on the free acid) of 1-hydroxyethane-1,1-diphosphonic acid in the form of its alkali metal salt. The weight ratio of (d1) to (f) is from 3:1 to 1:6 and of (d2) to (f) is from 40:1 to 2:1.
Inventors
- 👤 Guenther Vogt
- 👤 Hans Andree
- 👤 Gertrud Nienhaus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 22:51
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/36; C11D3/364; C11D3/02; C11D3/12; C11D3/124; C11D3/1246; C11D3/128; C11D3/361; C11D3/37; C11D3/3746; C11D3/3757; C11D3/3761
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
180 words
A detergent composition consisting of: (a) from about 5 to about 35% by weight of at least one water-soluble surfactant selected from the group consisting of an anionic and a nonionic compound, (b) from about 10 to about 40% by weight of a finely crystalline synthetic zeolite NaA, (c) from about 4 to about 20% by weight of a washing alkali selected from the group consisting of an alkali metal silicate and carbonate, (d) the following compounds in the form of their alkali metal salt; based on free acid, (d1) from about 0.1 to about 1% by weight of an aminoalkane polyphosphonic acid, (d2) from about 0.5 to about 5% by weight of a linear polymer or copolymer of acrylic acid or methacrylic acid and maleic acid, and (e) from about 0.5 to about 1% by weight, based on free acid, of 1-hydroxyethane-1,1-diphosphonate in the form of its alkali metal salt, with the proviso that the ratio by weight of component (d1):(e) is from about 40:1 to about 2:1, all weights being based on the weight of said detergent composition.
Claim 2
Dependent Claim
180 words
A detergent composition consisting of: (a) from about 5 to about 35% by weight of at least one water-soluble surfactant selected from the group consisting of an anionic and a nonionic compound, (b) from about 10 to about 40% by weight of a finely crystalline synthetic zeolite NaA, (c) from about 4 to about 20% by weight of a washing alkali selected from the group consisting of an alkali metal silicate and carbonate, (d) the following compounds in the form of their alkali metal salt; based on free acid, (d1) from about 0.1 to about 1% by weight of an aminoalkane polyphosphonic acid, (d2) from about 0.5 to about 5% by weight of a linear polymer or copolymer of acrylic acid or methacrylic acid and maleic acid, and (e) from about 0.5 to about 1% by weight, based on free acid, of 1-hydroxyethane-1,1-diphosphonate in the form of its alkali metal salt, with the proviso that the ratio by weight of component (d1):(e) is from about 40:1 to about 2:1, all weights being based on the weight of said detergent composition.
Claim 3
Dependent Claim
28 words
A detergent composition as in claim 1 wherein said component (d1) is selected from the group consisting of ethylenediamine tetramethylene phosphonate, diethylenetriamine pentamethylene phosphonate, and higher homologs thereof.
Claim 4
Dependent Claim
29 words
A detergent composition as in claim 1 wherein said component (d2) is selected from the group consisting of polyacrylate, polymethacrylate, and a copolymer of acrylic acid with maleic acid.
Claim 5
Dependent Claim
46 words
A detergent composition as in claim 3 wherein said copolymer comprises from about 50 to about 90% by weight of acrylic acid and from about 50 to about 10% by weight of maleic acid and has a molecular weight of between about 2,000 and about 200,000.
Claim 6
Dependent Claim
24 words
A detergent composition as in claim 1 containing component (d1) and component (d2) in a weight ratio of from about 1:1 to about 1:30.
Claim 7
Dependent Claim
24 words
A detergent composition as in claim 1 containing component (d1) and component (e) in a weight ratio of from about 2:1 to about 1:4.
Claim 8
Dependent Claim
24 words
A detergent composition as in claim 1 containing component (d2) and component (e) in a weight ratio of from about 20:1 to about 4:1.
Claim 9
Dependent Claim
22 words
A detergent composition as in claim 1 wherein components (d1), (d2) and (e) are present in the form of the sodium salts.
Claim 10
Dependent Claim
19 words
A detergent composition as in claim 1 wherein said anionic compound is selected from a sulfonate and a sulfate.
Claim 11
Dependent Claim
16 words
A detergent composition as in claim 1 wherein said nonionic compound is a polyglycol ether derivative.
References Cited (Backward Citations)
US3723333A
Cited
US3870522A
Cited
US3959168A
Cited
US3966629A
Cited
US3959167A
Cited
US4179391A
Cited
US4144226A
Cited
US4146495A
Cited
EP0026529A1
Cited
US4265777A
Cited
GB2097419A
Cited
EP0124913A1
Cited
US4652403A
Cited
US4707290A
Cited
DE3526405A1
Cited
US4737306A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-23 | 1993-10-23 | 1994-04-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-23 | 1997-10-23 | 1998-04-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-23 | 2001-10-23 | 2002-04-24 | $7700.00 | Window Closed / Lapsed |