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Publication numberUS2956951 A
Publication typeGrant
Publication dateOct 18, 1960
Filing dateOct 26, 1956
Priority dateOct 26, 1956
Publication numberUS 2956951 A, US 2956951A, US-A-2956951, US2956951 A, US2956951A
InventorsFurey Michael J
Original AssigneeExxon Research Engineering Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Water base lubricant containing dimethyl sulfoxide
US 2956951 A
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Description  (OCR text may contain errors)

WATER BASE LUBRICANT CONTAINING DIMETHYL SULFOXIDE Michael J. Furey, Berkeley Heights, NJ., assignor to Esso Research and Engineering Company, a corporation of Delaware No Drawing. Filed Oct. 26, 1956, Ser. No. 618,434

4 Claims. (Cl. 252-48.2)

This invention relates to water-base lubricants. Particularly, it relates to a water-base lubricant wherein water has been thickened to a lubricating oil viscosity with an organic thickener and small amounts of an organic sulfoxide have been added to impart extreme pressure properties to the lubricant.

The water-base lubricants of the invention are nonflamrnable, inexpensive lubricants having high load-carrying ability. These lubricants may be used as cutting oils, hydraulic fluids, metal-working fluids, and as general purpose lubricants where operating temperatures are not excessive.

The lubricating compositions of this invention will comprise water which has been thickened to a lubricating oil viscosity with an ether cellulose and which contains an extreme pressure improving amount of a dialkyl sulfoxide.

The ether cellulose thickeners operable in this invention include the water soluble C to C alkyl cellulose ethers such as methyl cellulose, ethyl cellulose, propyl cellulose, butyl cellulose, etc., and which include the monoand di-alkyl cellulose ethers, mixtures thereof, and mixed ether celluloses such as methyl ethyl cellulose, methyl propyl cellulose, etc.

The dialkyl sulfoxides useful in the invention have the general formula:

wherein each R represents the same or different alkyl radicals, containing from 1 to 3 carbon atoms, i.e., methyl, ethyl and nand iso-propyl radicals. For example, the sulfoxide can be dimethyl sulfoxide, diethyl sulfoxide, methyl ethyl sulfoxide, etc.

The lubricant of this invention will comprise a major proportion of water and a thickening amount, such as 0.5 to 10 wt. percent, e.g., 1 to 5 wt. percent, of ether cellulose and an extreme pressure imparting amount of dialkyl sulfoxide, such as 0.5 to 5.0 wt. percent, e.g., 1.0 to 3.0 wt. percent of the sulfoxide.

The invention will be further understood by the following examples.

EXAMPLE I A lubricant containing 1.7 wt. percent of a dimethyl ether of cellulose (commercially available under the name of Methocel 400), 2 wt. percent of dimethyl sulfoxide and 96.3 wt. percent of water, was prepared as follows: The Methocel 400 was mixed with about onefifth of the required amount of water as hot water for about minutes. The remaining four-fifths of the water was then added as ice water and the mixture was stirred until smooth and homogeneous. The resultant fluid was clear and colorless. The viscosity of this base mixture at room temperature was approximately 260 centistokes,

States Patent ice . 2 which is similar in viscosity to an SAE 30 grade oil. The 2 wt. percent of dimethyl sulfoxide was then added to the methyl cellulose thickened water. The sulfoxide immediately dissolved and the resultant product remained clear and colorless.

The product of Example I was then evaluated for its load-carrying ability in an Almen machine (a steel pin rotating at 600 r.p.m. between two halves of a loaded bearing) with gradual loading at 10 second intervals until failure. The product was also tested in the Shell 4-ball E.P. lubricant test. The results of these tests are shown in the following table, along with comparative data for a typical mineral lubricating oil.

Table 1 LOAD-CARRYING PROPERTIES OF METHYL CELLULOSE 'gIglENED WATER CONTAINING DIMETHYL SULF- As seen from the above table, the methyl cellulose thickened water had very little load-carrying ability in itself. However, upon the addition of 2 wt. percent of dimethyl sulfoxide, it was able to carry a total of 15 Almen weights before failure, and carried a load of 102 kg. in the 4-ball E.P. test. The typical lubricating oil carried a maximum of only 3 Weights in the Almen test and a 45 kg. load in the 4-ball test, thus illustrating the very high load-carrying ability of the water-base lubricant of the invention.

Other water-soluble additives may also be added to the composition, such as dyes, corrosion-inhibitors, metal deactivators, wetting agents, supplementary anti-friction or anti-wear additives, and bacteriostatic agents.

What is claimed is:

l. A water-base lubricant composition comprising a major proportion of water, 1 to 5 wt. percent of a water soluble ether cellulose thickener and l to 3 Wt. percent of a dialkyl sulfoxide having in the range of 1 to 3 carbon atoms in each alkyl group, wherein said lubricant composition is a clear solution.

2. A water-base lubricant composition comprising about to 99 wt. percent water, about 0.5 to 10.0 Wt. percent of a water soluble C to C alkyl ether cellulose thickener and about 0.5 to 5.0 wt. percent of a watersoluble dialkyl sulfoxide having in the range of 1 to 3 carbon atoms in each alkyl group, wherein said lubricant composition is a clear solution.

3. A water-base lubricant composition according to claim 2 wherein said ether cellulose is a methyl cellulose and said dialkyl sulfoxide is dimethyl sulfoxide.

4. A process of lubricating relatively moving, contacting surfaces which comprises applying to said surfaces a lubricant consisting of water thickened to a lubricating viscosity with a water-soluble alkyl cellulose ether thickener, and containing about 0.5 to 5.0 wt. percent of a water-soluble dialkyl sulfoxide having in the range or 1 to 3 carbonatoms in each alkyl group, wherein said lubricant is a clear solution.

References Cited in the file of this patent UNITED STATES PATENTS 4 Modl Nov. 14, 1944 Rogers et a1 June 28, 1949 Rogers et a1. .2; Dec. 12, 1950 McBride Nov. 25, 1952 Sullivan et a1. Dec. 31, 1957 OTHER REFERENCES Bastian: Metal Working Lubricants, McGraw-Hill, N.Y., 1951, pages 5 and 6.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1963901 *Apr 17, 1931Jun 19, 1934Eastman Kodak CoLubricant containing a cellulose derivative
US2287639 *Apr 27, 1939Jun 23, 1942Du PontLubricant composition comprising organic sulphonamides
US2318629 *Mar 4, 1938May 11, 1943Lubri Zol CorpLubricating composition
US2323789 *Sep 27, 1940Jul 6, 1943Tide Water Associated Oil CompLubricant composition
US2362761 *Jun 15, 1942Nov 14, 1944Hercules Powder Co LtdWater-soluble cellulose ether composition
US2474325 *Apr 7, 1943Jun 28, 1949Rodgers Jr Thomas TAqueous lubricant
US2533328 *Aug 27, 1945Dec 12, 1950Janet W RodgersLubricant coolant solution
US2619458 *May 14, 1949Nov 25, 1952Westinghouse Electric CorpCompositions embodying solid lubricants
US2818388 *Jan 4, 1954Dec 31, 1957Stepan Chemical CoCorrosion inhibition
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3211794 *Jul 1, 1960Oct 12, 1965Ethyl CorpSulfur-containing phenolic compounds
US3304258 *Oct 29, 1964Feb 14, 1967Chrysler CorpDrawing compound and method
US3424682 *Aug 8, 1966Jan 28, 1969Sacerdote Albert MMaterials-working composition containing a high molecular weight polymer
US4246125 *May 4, 1979Jan 20, 1981Edwin Cooper, Inc.Lubricating oil and fuel composition
US4448703 *Mar 4, 1982May 15, 1984The Lubrizol CorporationSolubilizer is reaction product of polycarboxylic acid acylation agent with hydroxyl acrylic amine
US4469586 *Sep 30, 1982Sep 4, 1984Chevron Research CompanyHeat exchanger antifoulant
US4666620 *Mar 13, 1986May 19, 1987The Lubrizol CorporationCarboxylic solubilizer/surfactant combinations and aqueous compositions containing same
US4770803 *Jul 3, 1986Sep 13, 1988The Lubrizol CorporationWater based functional fluids, i.e. lubricants, hydraulic fluids, cutting fluids
US5217637 *Jul 22, 1991Jun 8, 1993Huels AktiengesellschaftBiodegradable, nontoxic
USRE33124 *Sep 12, 1986Dec 5, 1989Singer and Hersch Industrial Development (PTY) Ltd.Water-based industrial fluids
USRE36479 *Oct 4, 1996Jan 4, 2000The Lubrizol CorporationAqueous compositions containing nitrogen-containing salts
EP0412271A1 *Jun 25, 1990Feb 13, 1991Hüls AktiengesellschaftHydraulic fluids
WO2009106359A1 *Mar 2, 2009Sep 3, 2009Carl Bechem GmbhWater-based lubricant composition having adjusted low to high viscosity
U.S. Classification508/219, 508/568
International ClassificationC10M173/02
Cooperative ClassificationC10M2209/12, C10N2240/40, C10N2250/02, C10N2240/401, C10M2219/04, C10M2201/02, C10N2240/08, C10M173/02
European ClassificationC10M173/02