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US4388205A
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Phosphate-free cleaning compositions
Assignee: Fidelity Union Bank
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Filing: 1981-11-06
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Granted: 1983-06-14
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Expires: 2001-11-06
Abstract
Abstract A liquid phosphate-free wash additive composition comprises an aqueous solution of the following active compounds: (A) 100 parts by weight of a polycarboxylic acid in the salt form (B) 2 to 400 parts by weight of an alkali metal gluconate or glucoheptonate (C) 20 to 700 parts by weight of an alkali metal metasilicate, and (D) 10 to 150 parts by weight of an alkali metal hydroxide.
Inventors
- 👤 Hans Stettler
- 👤 Karl Buser
- 👤 Jean-Pierre Chavannes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:31
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/3769; C11D3/3773; C11D3/02; C11D3/04; C11D3/044; C11D3/08; C11D3/20; C11D3/2075; C11D3/2086; C11D3/3757; C11D3/3765
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
57 words
A phosphate-free aqueous composition comprising (A) 100 parts by weight of a polycarboxylic acid in the salt form (B) 2 to 400 parts by weight of an alkali metal gluconate or glucoheptonate (C) 20 to 700 parts by weight of an alkali metal metasilicate, and (D) 10 to 150 parts by weight of an alkali metal hydroxide.
Claim 2
Dependent Claim
57 words
A phosphate-free aqueous composition comprising (A) 100 parts by weight of a polycarboxylic acid in the salt form (B) 2 to 400 parts by weight of an alkali metal gluconate or glucoheptonate (C) 20 to 700 parts by weight of an alkali metal metasilicate, and (D) 10 to 150 parts by weight of an alkali metal hydroxide.
Claim 3
Dependent Claim
24 words
A composition according to claim 1, wherein component (A) is a polycarboxylic acid alkali metal salt having a molecular weight from 160 to 1,000,000.
Claim 4
Dependent Claim
62 words
A composition according to claim 1, wherein component (A) is citric acid, an homopolymer of acrylic acid, methacrylic acid, α-hydroxy-acrylic acid, maleic acid, crotonic acid, iso-crotonic acid, itaconic acid, mesaconic acid, aconitic acid, methylenemalonic acid or citraconic acid, or a copolymer of such acids with one another or with one or more further ethylenically unsaturated compounds, in the alkali metal salt form.
Claim 5
Dependent Claim
17 words
A composition according to claim 1, wherein component (A) is polyacrylic or poly-α-hydroxyacrylic acid alkali metal salt.
Claim 6
Dependent Claim
14 words
A composition according to claim 1, wherein the alkali metal is sodium or potassium.
Claim 7
Dependent Claim
26 words
A composition according to claim 1, wherein the total amount of the 4 components (A) to (D) (dry weight) is from 20 to 70% by weight.
Claim 8
Dependent Claim
30 words
A composition according to claim 1, wherein the active components are present in the following proportions by weight, excluding the water present: (A) 35-75% (B) 2.5-25% (C) 20-45% (D) 5-30%.
Claim 9
Dependent Claim
92 words
A composition according to claim 3 wherein any copolymer of a carboxylic acid with a further ethylenically unsaturated comonomer as component (A) contains said ethylenically unsaturated comonomer in an amount of from 1 to 50% by weight, said comonomer being ethylene, propylene, alkyl(C 1 -C 4 ) or hydroxyalkyl(C 1 -C 4 )acrylate, alkyl(C 1 -C 4 ) or hydroxyalkyl(C 1 -C 4 )methacrylate, alkyl(C 1 -C 4 )α-hydroxyacrylate, acrylamide, methacrylamide, acrylonitrile, methacrylonitrile, acrolein, a vinyl ether, a vinyl ester of (C 1 -C 5 ) carboxylic acid, vinyl alcohol or furan.
Claim 10
Dependent Claim
50 words
A composition according to claim 2 wherein all the carboxylic acid groups of the polycarboxylic acid comprising component (A) are in salt form, component (B) is sodium or potassium gluconate or glucoheptonate, component (C) is anhydrous or hydrated sodium or potassium metasilicate and component (D) is sodium or potassium hydroxide.
Claim 11
Dependent Claim
30 words
A composition according to claim 9 containing components (A), (B), (C) and (D) in a total amount of 20 to 70% (dry weight) based on the weight of the composition.
Claim 12
Dependent Claim
12 words
A composition according to claim 10 having a pH higher than 10.
Claim 13
Dependent Claim
29 words
A composition according to claim 11 wherein components (A), (B), (C) and (D) are present in the following proportions, excluding water: (A) 35-60% (B) 5-15% (C) 25-40% (D) 5-25%
Claim 14
Dependent Claim
23 words
A process for cleaning goods which comprises washing the goods in water containing a cleaning-effective amount of a composition according to claim 1.
Claim 15
Dependent Claim
19 words
A process according to claim 13 wherein the water also contains a detergent or an anionic or non-ionic surfactant.
Claim 16
Dependent Claim
45 words
A process according to claim 13 wherein the composition contains components (A), (B), (C) and (D) in a total amount, based on dry weight, of 20 to 70% by weight, and is present in an amount of 0.1 to 60 g/kg goods to be washed.
Claim 17
Dependent Claim
44 words
A process according to claim 14 wherein the composition contains components (A), (B), (C) and (D) in a total amount, based on dry weight, of 20 to 70% by weight and the weight ratio of the composition to the detergent or surfactant is 0.5-5:1.
Claim 18
Dependent Claim
17 words
A composition according to claim 6 wherein component (A) is polyacrylic or poly-α-hydroxyacrylic acid alkali metal salt.
Claim 19
Dependent Claim
17 words
A composition according to claim 7 wherein component (A) is polyacrylic or poly-α-hydroxyacrylic acid alkali metal salt.
Claim 20
Dependent Claim
17 words
A composition according to claim 11 wherein component (A) is polyacrylic or poly-α-hydroxyacrylic acid alkali metal salt.
Claim 21
Dependent Claim
17 words
A composition according to claim 15 wherein component (A) is polyacrylic or poly-α-hydroxyacrylic acid alkali metal salt.
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) | 1986-06-13 | 1986-12-13 | 1987-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-13 | 1990-12-13 | 1991-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-13 | 1994-12-13 | 1995-06-14 | $7700.00 | Window Closed / Lapsed |