C - Chemistry – Metallurgy – 10 – M
Patent
C - Chemistry, Metallurgy
10
M
253/104
C10M 133/18 (2006.01) C10M 137/10 (2006.01) C10M 141/10 (2006.01) C10M 163/00 (2006.01) C11D 1/12 (2006.01)
Patent
CA 2017819
L-2452R Title: LUBRICATING OIL COMPOSITIONS AND CONCENTRATES Abstract A lubricating oil composition is described which is useful in internal combustion engines and which exhibit improved oxidation and wear performance. More particularly, lubricating oil compositions are described which comprise (A) a major amount of oil of lubricating vis- cosity; (B) at least about 1.0% by weight of at least one carboxylic derivative composition produced by react- ing (B-1) at least one substituted succinic acylating agent with (B-2) at least one amine compound character- ized by the presence within its structure of at least one HN< group wherein said substituted succinic acylat- ing agents consist of substituent groups and succinic groups wherein the substituent groups are derived from polyalkene, said polyalkene being characterized by an Mn value of 1300 to about 5000 and an Mw/Mn value of about 1.5 to about 4.5, said acylating agents being character- ized by the presence within their structure of an aver- age of at least 1.3 succinic groups for each equivalent weight of substituent groups; and (C) at least one manganese compound in an amount sufficient to provide from 1 to about 500 ppm of manganese as metal, provided that the manganese com- pound is not a neutral manganese dihydrocarbyl phosphoro- dithioate. The oil compositions also may contain other desirable additives including (D) at least one metal dihydrocarbyl phosphoro- dithioate; (E) detergent effective amounts of at least one neutral or basic alkali metal salt of a sulfonic or carboxylic acid; and/or (F) at least one carboxylic ester derivative is defined herein. In one embodiment, the oil compositions of the present invention contain the above additives and other addi- tives described in the specification in an amount suffi- cient to enable the oil to meet all the performance requirements of the API Service Classification identi- fied as "SG".
Ridout & Maybee Llp
The Lubrizol Corporation
LandOfFree
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