US4446044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aqueous water-in-oil cleaning emulsion
Assignee: EIDP Inc
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Filing: 1982-05-07
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Granted: 1984-05-01
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Expires: 2002-05-07
Abstract
Abstract A water-in-oil emulsion stabilized with a blend of selected nonionic surfactants and having a preferred weight ratio of aqueous dispersed phase to continuous organic solvent phase between about 3:1 and 8:1 is provided. The emulsion is characterized by superior cleaning properties and particularly by the capability of removing both water-soluble and solvent-soluble materials from automotive finishes.
Inventors
- 👤 Andrew F. Rutkiewic
- 👤 James P. White
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 08:57
CPC Classifications
C; C23; C23G; C23G5/00; C23G5/06
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
166 words
A cleaning composition of a water-in-oil emulsion consisting essentially of: (a) a dispersed phase of 70-85 percent by weight, based on the weight of the emulsion, of water; (b) a continuous phase of 10-25 percent by weight, based on the weight of the emulsion, of oil, wherein said oil is a blend of aromatic organic solvents or aromatic and aliphatic organic solvents having a solvency parameter with a dispersion component value of 7.70-8.80, a polar component value of 0-0.70, and a hydrogen bonding component value of 0.005-1.42; (c) 1.5-7.5 percent by weight, based on the weight of the emulsion, of at least one hydrophobic nonionic surfactant having an HLB value less than 3; and (d) 1.5-7.5 percent by weight, based on the weight of the emulsion, of at least one hydrophilic nonionic surfactant having an HLB value greater than 10 and soluble in solvent blends having a solvency parameter with a polar component value less than 0.9 or a hydrogen bonding component value less than 1.
Claim 2
Dependent Claim
166 words
A cleaning composition of a water-in-oil emulsion consisting essentially of: (a) a dispersed phase of 70-85 percent by weight, based on the weight of the emulsion, of water; (b) a continuous phase of 10-25 percent by weight, based on the weight of the emulsion, of oil, wherein said oil is a blend of aromatic organic solvents or aromatic and aliphatic organic solvents having a solvency parameter with a dispersion component value of 7.70-8.80, a polar component value of 0-0.70, and a hydrogen bonding component value of 0.005-1.42; (c) 1.5-7.5 percent by weight, based on the weight of the emulsion, of at least one hydrophobic nonionic surfactant having an HLB value less than 3; and (d) 1.5-7.5 percent by weight, based on the weight of the emulsion, of at least one hydrophilic nonionic surfactant having an HLB value greater than 10 and soluble in solvent blends having a solvency parameter with a polar component value less than 0.9 or a hydrogen bonding component value less than 1.
Claim 3
Dependent Claim
39 words
The composition of claim 1 wherein the hydrophobic surfactant is a poly(oxyethylene)-poly(oxypropylene) block copolymer of the formula ##STR5## wherein a, b, and c are positive integers and the molecular weight of the poly(oxypropylene) content is between 2750 and 4000.
Claim 4
Dependent Claim
23 words
The composition of claim 2 wherein the hydrophilic surfactant is a polyoxyethylated nonylphenol of the formula ##STR6## wherein n is a positive integer.
Claim 5
Dependent Claim
40 words
The composition of claims 1, 2 or 3 which consists essentially of 75-79 percent by weight of water, 15-17 percent by weight of solvent blend, 1.5-7.5 percent by weight of hydrophobic surfactant, and 1.5-7.5 percent by weight of hydrophilic surfactant.
Claim 6
Dependent Claim
23 words
The composition of claim 4 wherein the solvent blend consists essentially of toluene and V.M. & P. naphtha in a 50:50 weight ratio.
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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) | 1987-05-01 | 1987-10-31 | 1988-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-01 | 1991-10-31 | 1992-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-01 | 1995-10-31 | 1996-05-01 | $7700.00 | Window Closed / Lapsed |