US1830970A - Lubricant - Google Patents

Description

Patented Nov. 10, 1931 UNITED STATES PATENT OFFICE FREDERICK W. SULLIVAN, 33., 01' WRITING, INDIANA, ASSIGNOB) TO STANDARD OIL COMPANY, OF WRITING, INDIANA, A CORPORATION OF INDIANA- LUBBICAN '1.

No Drawing.

be fully understood from the following de-' scri tion thereof.

I ave found that the lubricating properties and metal wetting properties of mineral lubricant oils may be substantially increased by the addition thereto of soaps of fatty acids with strongorganic nitrogenous bases, particularly those ca able of forming carbonates stable at the oiling point of water, such soaps being further characterized in that they form substantially no ash o? ignition, and are stable under conditions 0 use.

A material of the nature of a soap which may be incorporated into a mineral lubricant oil in accordance with the present invention may be produced by heating together, suitably at steam bath temperatures, dicyandiamid with slightly more than a monomolecu lar equivalent of a suitable fatt acid, such as oleic acid. Other fatty aci s may also be employed, as stearic acid, the acid of tallow, cottonseed oil, palm oil and the like. The resulting material, which may be designatedas a soap (although its precise composition has not yet been determined), may be incorporated in a mineral lubricant oil, for example, a. viscous petroleum distillate having a viscosity of 200 sec. Saybolt at 100 F.

or higher in proportions of 0.2% upwardl and preferably about 0.5%, to substantial y increase the lubricating properties of the oi In a similar manner I ma employ the higher.

fatty acid soaps of guamdine and of guanyl derivatives such as dicyandiamidine prepared by heating these compounds or their carbonates with a suitable fatty acid. In general, organic bases containing the guanyl radical are highly suitable for use in preparing soaps to be incorporated into mineral ubricating oils in accordance with the present invention. I

The lubricating oils produced in accordance with the present invention are particularly suited for lubricating automotive engines. In types of automobiles such as those having planetary transmissions in a casing open to the crank casing of theautomobile Application filed November 1, 1926. Serial No. 145,700.

engine, lubricant. oils prepared in accordance with the present invention provide not only a highly effective lubrication for the automotive engines, but also prevent glazing and consequent chatter of that-ransmlssion bands of the planetary transmission.

Iclaim: 4 a

1. A lubricating compound comprising a lubricant mineral oil and a fatty acid soap of a. non cyclic organic base havin at least two amino nitrogens bonded to a car on atom and capable of formin carbonates stable at the temperature of boifi substantially ashless upon ignition.

2. A lubricating compound comprising a lubricant hydrocarbon oil and a fatty acid compound of 'an organic base containing a guanyl radical.

3. A lubricating compound comprising a viscous hydrocarbon oil and a fatty acid soap of guanidine.

ngwater, said soap being 4. The method of treating brake and transmission bands used in connection with a planeta transmission to keep the bands soft and pliiizle which consists in maintaining in the transmission casing a bath. consisting of a viscous hydrocarbon oil, combined with a fatty acid soap of a non-cyclic organic base havmg at least two amino nitrogens bonded to a carbon atom capable of-forming carbonates stableat the temperature of boiling water;

5. The method of treating brake and transmission bands used in connection with a planetary transmission to keep the bands soft and pliable whic'h'consists in maintaining in the transmission casing a bath consisting of a viscous hydrocarbon oil, combined with a fatty acid soap of an organic nitrogenous base containing aguanyl radical.

6. The method of improving the lubricant qualities of a viscous hydrocarbon oil vehicle consists in adding thereto a fatty acid soap of a non-cyclic organic base having at least two amino nitrogens bonded to a carbon atom and capable of forming carbonates stable at the temperature of boiling Water, said soap being substantially ashless upon ignition.

7. The method of improving the lubricant qualities of a viscous hydrocarbon oil which consists in adding thereto a fatty acid soap of an organic nitrogenous base containing a guanyl radical.

8. A lubricating compound comprising a viscous hydrocarbon oil and a fatty acid soap of a compound of the type formula NH: NH=C NHR in which R is hydrogen or a substituting group.

9. A lubricating compound comprising a lubricant mineral oil and 0.2 to about 0.5% of a fatty acid soap of a non-cyclic organic base having at least two amino nitrogens bonded to a carbon atom and capable of forming carbonates stable at the temperature of boiling water, said soap being substantially ashless upon ignition.

10. A lubricating compound comprising a lubricant hydrocarbon oil and 0.2 to 0.5% of a fatty acid compound of an organic base containing a guanyl radical.

11. A lubricating compound comprising a viscous hydrocarbon oil and 0.2 to 0.5% of a fatty acid soap of guanidine.

12. A lubricating compound comprising a lubricant hydrocarbon oil and a fatty acid soap of dicyandiamid.

13. A lubricant compound comprising a viscous hydrocarbon oil and a fatty acid soap of dicyandiamidine.

FREDERICK W. SULLIVAN, JR.