Two-cycle engine oils containing sulfurized alkyl phenols

Patent 4740321 Issued on April 26, 1988. Estimated Expiration Date:

April 10, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

Patent References

3015320

3192910

3336226

Basic metal salts of sulfur- and methylene-bridged polyphenol compositions, and epoxide-reacted derivatives thereof, and lubricants containing them
Patent #: 3951830
Issued on: 04/20/1976
Inventor: Karn

Hydrocarbon-substituted methylol phenols
Patent #: 4053428
Issued on: 10/11/1977
Inventor: Pindar , et al.

Amino phenol-detergent/dispersant combinations and fuels and lubricants containing same
Patent #: 4200545
Issued on: 04/29/1980
Inventor: Clason , et al.

Mannich additives modified by ditertiary alkyl phenol
Patent #: 4242212
Issued on: 12/30/1980
Inventor: Hanson

Hydrocarbon-substituted methylol phenols
Patent #: 4273891
Issued on: 06/16/1981
Inventor: Pindar , et al.

Lubricating oil composition
Patent #: 4283294
Issued on: 08/11/1981
Inventor: Clarke

Amino phenols useful as additives for fuels and lubricants Patent #: 4320021
Issued on: 03/16/1982
Inventor: Lange

Inventors

Assignee

The Lubrizol Corporation

Application

No. 06/850315 filed on 04/10/1986

US Classes:

508/248, Acyclic nitrogen attached indirectly to the hetero ring by acyclic nonionic bonding44/334, Chalcogen in the hetero ring44/335, Plural nitrogens in the hetero ring (e.g., piperazines, etc.)44/398, Mono- di-, or polyester of polycarboxylic acids44/415, Compound of indeterminate structure prepared by reacting a phenol, an aldehyde, and ammonia or substituted ammonia44/435, Sulfur or phosphorus attached directly or indirectly, by nonionic bonding, to carbon of an organic compound508/259, 1,4-Diazines508/398, With nonhydrocarbon organic compound in addition to those remaining from overbasing process (e.g., antioxidants, VI improvers, etc.)508/460, Overbased or carbonated carboxylates508/558, Plural nitrogens bonded directly to a single acyclic hydrocarbon chain508/559, Oxygen or sulfur attached indirectly to the nitrogen by acyclic nonionic bonding508/571, Benzene ring attached indirectly to the sulfur atom or sulfur chain by acyclic nonionic bonding508/573, Halogen, a ring, carbonyl, or additional -OH bonded directly to one of the benzene rings508/574Overbased or carbonated (e.g., overbased sulfurized phenates, etc.)

Examiners

Primary: Howard, Jacqueline V.

Attorney, Agent or Firm

International Classes

C07C 37/14 (20060101)
C07C 37/00 (20060101)
C07C 43/00 (20060101)
C07C 43/178 (20060101)
C10M 129/91 (20060101)
C10M 129/00 (20060101)
C10M 141/00 (20060101)
C10M 129/10 (20060101)
C10M 129/12 (20060101)
C08F 8/00 (20060101)
F02B 75/02 (20060101)

Abstract

Lubricating oils are described which are useful in two-cycle engines. These oils contain a minor amount of at least one phenolic compound of the general formula:(R)a --AR--(OH)b, or salts thereof,wherein R is a substantially saturated, hydrocarbon-based group of an average of at least 10 aliphatic carbon atoms; a and b are each independently an integer of one up to three times the number of aromatic nuclei present in Ar with the proviso that the sum of a and b does not exceed the unsatisfied valences of Ar; and Ar is a linked polynuclear moiety wherein the bridging linkages are sulfur-containing moieties, having 0 to 3 optional substituents consisting of lower alkyl, lower alkoxyl, methylol or lower hydrocarbon-based substituted methylol, halo and combinations of two or more of said optional substituents.