US3950260A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyacrylates of selective viscosity as detergent builders
Assignee: ELDIB ENGINEERING AND RESEARCH Inc
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Filing: 1972-04-10
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Granted: 1976-04-13
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Expires: 1992-04-10
Abstract
Abstract Water soluble polyacrylates and salts of polyacrylates having selected viscosities measured in terms of a 12.5 wt. percent aqueous solution of the 100 percent sodium salt at room temperature (72°F.) are very effective detergent builders in heavy duty solid detergents and in liquid detergents. Detergents formulated from them have excellent chelating ability for heavy metal ions, excellent cotton detergency, good dishwashing ability and foam stability.
Inventors
- 👤 Ibrahim Andrew Eldib
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 18:26
CPC Classifications
C; C11; C11D; C11D3/00; C11D3/16; C11D3/37; C11D3/3746; C11D3/3757
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
113 words
A detergent formulation comprising a. an organic water soluble surfactant selected from the group consisting of anionic, nonionic, zwitterionic, ampholytic surfactants and mixtures thereof, and b. a polyelectrolyte builder comprising a water soluble salt of a homopolymer of an acid having the general formula: ##EQU3## wherein R 1 is a hydrogen atom or methyl radical, said polyelectrolyte having a chelation value of at least about 75, the viscosity of a 12.5 wt. percent aqueous solution of the 100 percent sodium salt of said homopolymer at 72° F. being in a range of 25-350 centipoises, the weight ratio of said polyelectrolyte builder to said surfactant varying between about 1:5 to less than about 5:1.
Claim 2
Dependent Claim
113 words
A detergent formulation comprising a. an organic water soluble surfactant selected from the group consisting of anionic, nonionic, zwitterionic, ampholytic surfactants and mixtures thereof, and b. a polyelectrolyte builder comprising a water soluble salt of a homopolymer of an acid having the general formula: ##EQU3## wherein R 1 is a hydrogen atom or methyl radical, said polyelectrolyte having a chelation value of at least about 75, the viscosity of a 12.5 wt. percent aqueous solution of the 100 percent sodium salt of said homopolymer at 72° F. being in a range of 25-350 centipoises, the weight ratio of said polyelectrolyte builder to said surfactant varying between about 1:5 to less than about 5:1.
Claim 3
Dependent Claim
13 words
The detergent formulation of claim 1 wherein R 1 is a hydrogen atom.
Claim 4
Dependent Claim
18 words
The detergent formulation of claim 1 wherein said water soluble salt of said homopolymer is a sodium salt.
Claim 5
Dependent Claim
23 words
The detergent formulation of claim 1 wherein the weight ratio of said polyelectrolyte builder to said surfactant varies from about 1:5 to 4:1.
Claim 6
Dependent Claim
128 words
A liquid detergent formulation comprising: a. an organic water soluble surfactant selected from the group consisting of anoinic, nonionic, zwitterionic, ampholytic surfactants and mixtures thereof, b. a polyelectrolyte builder comprising a water soluble salt of a homopolymer of a acid having the general formula: ##EQU4## wherein R 1 is a hydrogen atom or methyl radical, said polyelectrolyte having a chelation value of at least about 75, the viscosity of a 12.5 wt. percent aqueous solution of the 100 percent sodium salt of said homopolymer at 72° F. being in a range of 24-350 centipoises, the weight ratio of said polyelectrolyte builder to said surfactant varying between about 1:5 to less than about 5:1, and c. from about 30 to 90 wt. percent water, based on total detergent formulation.
Claim 7
Dependent Claim
128 words
A liquid detergent formulation comprising: a. an organic water soluble surfactant selected from the group consisting of anoinic, nonionic, zwitterionic, ampholytic surfactants and mixtures thereof, b. a polyelectrolyte builder comprising a water soluble salt of a homopolymer of a acid having the general formula: ##EQU4## wherein R 1 is a hydrogen atom or methyl radical, said polyelectrolyte having a chelation value of at least about 75, the viscosity of a 12.5 wt. percent aqueous solution of the 100 percent sodium salt of said homopolymer at 72° F. being in a range of 24-350 centipoises, the weight ratio of said polyelectrolyte builder to said surfactant varying between about 1:5 to less than about 5:1, and c. from about 30 to 90 wt. percent water, based on total detergent formulation.
Claim 8
Dependent Claim
13 words
The detergent formulation of claim 5 wherein R 1 is a hydrogen atom.
Claim 9
Dependent Claim
18 words
The detergent formulation of claim 5 wherein said water soluble salt of said homopolymer is a sodium salt.
Claim 10
Dependent Claim
23 words
The detergent formulation of claim 5 wherein the weight ratio of said polyelectrolyte builder to said surfactant varies from about 1:5 to 4:1.
Claim 11
Dependent Claim
20 words
The detergent formulation of claim 6 wherein water comprises from about 40 to 75 wt. percent of the total formulation.
Claim 12
Dependent Claim
113 words
A detergent formulation consisting essentially of a. an organic water soluble surfactant selected from the group consisting of anionic, nonionic, zwitterionic, ampholytic surfactants and mixtures thereof, and b. a polyelectrolyte builder comprising a water soluble salt of a homopolymer of an acid having the general formula: ##EQU5## wherein R 1 is a hydrogen atom or methyl radical, said polyelectrolyte having a chelation value of at least 75, the viscosity of a 12.5 weight percent aqueous solution of the 100 percent sodium salt of said homopolymer at 72° C. being less than about 500 centipoises, the weight ratio of said polyelectrolyte builder to said surfactant varying between about 1:5 to less than about 5:1.
Claim 13
Dependent Claim
113 words
A detergent formulation consisting essentially of a. an organic water soluble surfactant selected from the group consisting of anionic, nonionic, zwitterionic, ampholytic surfactants and mixtures thereof, and b. a polyelectrolyte builder comprising a water soluble salt of a homopolymer of an acid having the general formula: ##EQU5## wherein R 1 is a hydrogen atom or methyl radical, said polyelectrolyte having a chelation value of at least 75, the viscosity of a 12.5 weight percent aqueous solution of the 100 percent sodium salt of said homopolymer at 72° C. being less than about 500 centipoises, the weight ratio of said polyelectrolyte builder to said surfactant varying between about 1:5 to less than about 5:1.
Claim 14
Dependent Claim
13 words
The detergent formulation of claim 10 wherein R 1 is a hydrogen atom.
References Cited (Backward Citations)
US3308067A
Cited
US3623991A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-04-13 | 1979-10-13 | 1980-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-04-13 | 1983-10-13 | 1984-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-04-13 | 1987-10-13 | 1988-04-13 | $7700.00 | Window Closed / Lapsed |