Dispersants and dispersant viscosity index improvers from select

Details Dispersants and dispersant viscosity index improvers from select Dispersants and dispersant viscosity index improvers from select

1998-06-23

2000-08-15

Bell, Mark L.

Solid anti-friction devices, materials therefor, lubricant or se

Lubricants or separants for moving solid surfaces and...

Compound of indeterminate structure, prepared by reacting an...

585507, 585508, 585 7, 585 8, 585 10, 585 11, 585 17, 585 19, 585 24, 585 12, 526173, 526337, 526340, 524522, 524523, 5253328, 5253329, 5253331, 508543, 508558, 508559, C10L 116, C10M10102, C08J 300, C08F23610

Patent

active

061036765

ABSTRACT:
The invention provides dispersants and dispersant viscosity index improvers which include polymers of conjugated dienes which have been hydrogenated, functionalized, optionally modified and post treated. The dispersant substances include a copolymer of two different conjugated dienes. The polymers are selectively hydrogenated to produce polymers which have highly controlled amounts of unsaturation, permitting highly selective functionalization. The polymers may be functionalized by hydroformylation followed by reductive amination. Also provided are lubricant fluids, such as mineral and synthetic oils, which have been modified in their dispersancy and/or viscometric properties by means of the dispersant substances of the invention. Also provided are methods of modifying the dispersancy and/or viscometric properties of lubricating fluids such as mineral and synthetic lubricating oils. The dispersant substances may also include a carrier fluid to provide dispersant concentrates.

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