US1871941A - Lubricating compound - Google Patents

Description

Patented Aug. 16, 1932 "UNITED STATES names a. aavnson, or wmme, mama, assmnon 'ro smpn mmnm.

or wnnme, mama-a, a conroaa'rron or nmnmanunarcarmq courounn R Drawing.

The present invention relates to im'" r'ovements in 01]. compounds, and more part1cular-' ly to heavy oil compounds or greases suit-'- able for use as gear greases and in other situ- 5 ations, such as the lubrication of thrust bearings, wherein metal to metal contact of the parts to be lubricated is likely to occur under heavy load.

In accordance with the present invention, a :0 Suitable lubricating compound is prepared b incorporating with a desired lubricating 011 of high viscosit a heavy metal compound of a sulfonic acid erived from the treatment of a petroleum oil with strong sulfuric acid, referabl fuming sulfuric acid. The sulonic aci may be of the preferentially oilsoluble t e, such as is described, for example, in t e patent of Humphreys, et al., No. 1,286,179, granted November 26, 1918, or may- 50 be of the preferentially water-soluble type,

such as is described in the patent to Humphreys et al., No. 1,474,933, granted N ovember 20, 1923. In general the use of the compounds of the preferentially oil soluble type is preferred. The salts of the sulfonlc compounds with lead, copper, zinc, iron or other heavy metals may be used. Such salts may be produced by direct reaction of the corresponding sulfonic acids with the bases of the heavy metal, or by double decomposition between a water soluble salt of the desired petroleum sulfonic compound, for example, the sodium salts, and a salt of the hea metal. For example, the lead sulfonic acid com- 5 pounds may be 'roduced by direct reaction between the sul onic acids and litharge, or by reaction between equivalent proportions of the sodium salt of the petroleum sulfonic acid and lead acetate.

In preparing the lubricating compound in accordance with the fpresent invention, a heavy lubricating oil 0 the desired viscosity, preferably 80 sec. Saybolt or higher at 210 is thorou hly intermixed with from 5 to 30% of the sciected heavy metal salt of petroleum sulfonic acids, for example, the lead salt. Thus, a compoundsuit-able for use on the worm gears of automotive trucks and the like may be prepared by incorporating 50 into a heavy lubricatlng oil having a viscosity Applica-tion filed m 12, 19119. 8613180. 817,921;

of 105 to'115 sec.- Saybolt at 210F. from 15 to 25% of a stock consisting of a'mixtureof lead compounds of preferentially" oil-soluble petroleum sulfonic acids, said mixture containing to of the lead compound and the remainder of viscous petroleum oil. In place of the lead compound, compounds of other heavy metals'or-of the preferentially watersoluble type of 'sulfonic acid maybe em ployed. It isreadily' understood that the lac above example i's'intended to beillustrati've,

and that compositions may be prepared in which oils of varying viscosities and varying Y proportions of the heavy metal compound of the petroleum sulfonic acid are employed, in accordance with the characteristics desired in the final product. Thus for very severe work I have employed as high as '27 to 30% of the lead compound in a 90 viscosity oil (210).

The compounds prepared in accordance with the present invention are particularly advantageous in preventin seizure of bear ings under severe loads, w ere the lubricating oil film may break and metal to metal contact occur, and are remarkably efl'ective in preventing uneven wear, scoring and pitting. The compound of the present invention is likewise advantageous in that it does not tend to foam and therefore to work out of bearings. In these and other respects the: compound of the present invention is greatly superior to the types of greases prepared hitherto for similar use, including compounds containin sodium soaps and heavy metal soaps of atty oils such as fish oil. 1

I claim:

1. A lubricating compound comprising a viscous lubricating oil and a heavy metal compound of a petroleum sulfonic acid.

2. A lubricating compound comprising a viscous lubricant hydrocarbon oil having a viscosity of at least sec. Saybolt at 210 F. and a heavy metal compound of a petroleum sulfonic acid. 1

3. A lubricating compound comprisin a e: viscous hydrocarbon oil and 5 to 15% o a heavy metal compound of a petroleum sulfonic acid. I

4. A lubricating compound comprising a lubricant hydrocarbon oil having a viscosity 10.

of 10s a; 115 sec. s. It at 210 F., and 10% eta-lead compoun of a petroleum sulfonic 5. A lubricating compound comprising a viscous lubricating oil, and a co per compound of a petroleum sulfcnic sci 4 6. A lubricatingl compound com rising a viscous lubricant ydrocarbon oil aving a viscosity of at least 80 sec. Sa bolt at 210 F and a copper compound 0 a petroleum su lfomc and. A

7. A lubricating compound comprisinga viscouslubri oi andaniron compound of a petroleum fomc acid.

1 8. A lubricatin compound com rising a viscous lubricant ydrocarbon oil aving a viscosity of at least 80 sec. Saybolt at 210 -F., and an iron compound of a petroleum sulfonic acid.

go 9. Alubricating compoundcomprising a viscous lubricatin oil and a lead compound ofa petroleum su fomc acid.

10. A lubricating compound com rising a viscous lubricant hydrocarbon oil aving a 35 viscosity of at least 80 sec. Saybolt at 210 F.,' an iia lead compound of a petroleum sulfonic ac1 Witness my hand this sixth day of July,

1929. 80. MAURICE H. ARVESON.