C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
253/53, 253/81
C10M 141/06 (2006.01) C10M 141/10 (2006.01) C10M 163/00 (2006.01) F02B 1/04 (2006.01) F02B 75/12 (2006.01) F02F 7/00 (2006.01)
Patent
CA 1333594
A lubricating oil formulation is described which is useful in internal combustion engines. More particularly, lubricating oil compositions for internal combustion engines are described which comprise (A) a major amount of oil of lubricating viscosity, and minor amounts of (B) at least one carboxylic derivative compo- sition produced by reacting (B-1) at least one substi- tuted succinic acylating agent with (B-2) from about 0.70 equivalent up to less than one equivalent, per equivalent of acylating agent, of at least one amine compound characterized by the presence within its struc- ture of at least one HN< group, and wherein said substi- tuted succinic acylating agent consists of substituent groups and succinic groups wherein the substituent groups are derived from a polyalkene, said polyalkene being characterized by an Mn value of about 1300 to about 5000 and an Mw/Mn value of about 1.5 to about 4.5, said acylating agents being characterized by the pres- ence within their structure of an average of at least 1.3 succinic groups for each equivalent weight of substi- tuent groups, and (C) at least one metal salt of a dihy- drocarbyl dithiophosphoric acid wherein (C-1) the dithio- phosphoric acid is prepared by reacting phosphorus penta- sulfide with an alcohol mixture comprising at least 10 mole percent of isopropyl alcohol and at least one primary aliphatic alcohol containing from about 3 to about 13 carbon atoms, and (C-2) the metal is a Group II metal, aluminum, tin, iron, cobalt, lead, molybdenum, manganese, nickel or copper. The oil compositions of the invention also may contain (D) at least one carbox- ylic ester derivative composition, and/or (E) at least one neutral or basic alkaline earth metal salt of at least one acidic organic compound, and/or (F) at least one partial fatty acid ester of a polyhydric alcohol. In one embodiment, the oil compositions of the present invention contain the above components and other addi- tives described in this specification in amounts suffi- cient to enable the oil to meet all the performance re- quirements of the new API Service Classifications identi- fied as "SG" and "CE".
600562
Ripple David E.
Schroeck Calvin W.
Ridout & Maybee Llp
The Lubrizol Corporation
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