Esterified copolymers of polyalkenes/unsaturated acidic reagents useful as lubricant and fuel additives
AssigneeChevron Oronite Company LLC
InventorKenneth D. Nelson
Life of this patent
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Abstract
Esterified polyalkene/UAR copolymer reaction products useful as (1) a friction modifier for lubricating oils such as automatic transmission fluids to improve torque capacity and anti-shudder durability and for continuous variable transmissions (CVTs), (2) a friction modifier for fuels or (3) a cold flow improver for diesel fuels are provided. The esterified copolymer reaction product may be used as is or can be further derivatized (e.g., by post treatment of the esterified copolymer reaction product with, for example, ethylene carbonate or boric acid).
Claims44
An esterified polyalkene/unsaturated acidic reagent copolymer which is the reaction product of a polyol and a copolymer of the general formula:
- wherein X and X′ in each repeating unit of the copolymer are independently selected from the group consisting of —OH;
- —O—R3 wherein R3 is a lower alkyl of 1 to 6 carbon atoms;
- or taken together are —O— to form a succinic anhydride group;
- n is a whole integer from 1 to 3;
- R1 is a lower alkyl of 1 to 6 carbon atoms;
- R2 is a polyalkyl group having about 9 to about 200 carbon atoms;
- m is a whole integer of from 1 to 3;
- x is a number greater than 1 up to 20;
- Int. is at least one initiating radical;
- and Ter. is at least one terminating group;
- and wherein the copolymer has a succinic ratio of about 1 and wherein the reaction product is from about 40 to about 70% esterified.
Dependencies are inferred from the claim text.