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1. (WO2001004243) HAZE FREE OIL ADDITIVE COMPOSITIONS

Pub. No.:    WO/2001/004243    International Application No.:    PCT/US2000/018945
Publication Date: Fri Jan 19 00:59:59 CET 2001 International Filing Date: Thu Jul 13 01:59:59 CEST 2000
IPC: C10L 1/14
C10L 10/00
C10M 129/95
C10M 133/52
C10M 143/12
Applicants: MOBIL OIL CORPORATION
Inventors: COOLBAUGH, Thomas, S.
LOVELESS, Frederick, C.
MARLIN, John, E., II
MATTHEWS, Demetreos, N.
Title: HAZE FREE OIL ADDITIVE COMPOSITIONS
Abstract:
The invention provides dispersants and dispersant viscosity index improvers which include polymers of conjugated dienes which have bee 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 blended with lower molecular weight components. 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. The addition of minor amounts of lower molecular weight components improves compatibility and reduces haze. Also provided are methods of modifying the dipsersancy 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.