Claims
- 1. 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.
- 2. 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.
- 3. The composition of claim 2 wherein the hydrophilic surfactant is a polyoxyethylated nonylphenol of the formula ##STR6## wherein n is a positive integer.
- 4. 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.
- 5. The composition of claim 4 wherein the solvent blend consists essentially of toluene and V.M. & P. naphtha in a 50:50 weight ratio.
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of application Ser. No. 252,573, filed Apr. 9, 1981, now abandoned which is a continuation-in-part of application Ser. No. 208,421, filed Nov. 19, 1980, now abandoned.
US Referenced Citations (6)
Foreign Referenced Citations (3)
Number |
Date |
Country |
1067685 |
Nov 1979 |
CAX |
7608911 |
Feb 1977 |
NLX |
1553212 |
Sep 1979 |
GBX |
Non-Patent Literature Citations (1)
Entry |
Nonionic Surfactants-Martin J. Schick, Marcel Dekkel Inc., New York 1967. |
Continuation in Parts (2)
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Number |
Date |
Country |
Parent |
252573 |
Apr 1981 |
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Parent |
208421 |
Nov 1980 |
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