Viscosity index improver-dispersant additive useful in oil compositions

Patent · Tue Oct 25 04:00:00 EDT 1988

OSTI ID:6631531

Gardiner, J B; Dick, M N

A process comprising grafting in the substantial absence of solvent a hydrocarbon polymer of C/sub 2/ to C/sub 28/ olefin, the polymer having a number average molecular weight in the range of about 5,000 to 500,000 with an unsaturated material selected from the group consisting of: (A) ethylenically unsaturated C/sub 3/ to C/sub 10/ carboxylic acid having 1 to 2 carboxylic acid groups or an anhydride group, and (B) nitrogen-containing ethylenically unsaturated monomers containing 6 to 30 carbon atoms and 1 to 4 nitrogen atoms, in the presence of a free radical initiator and a chain stopping agent comprising at least one member selected from the group consisting of alphatic mercaptans having 4 to 24 carbon atoms, deithyl hydroxyl amine cumene and phenols, the grafting being conducted in a manner and under conditions sufficient to form a substantially oil soluble graft copolymer useful as a viscosity index improver-dispersant additive for lubricating oil compositions.

• Assignee: Exxon Chemical Patents, Inc., Linden, NJ
• Patent Number(s): US 4780228
• OSTI ID: 6631531
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
023000* -- Petroleum-- Properties & Composition
ADDITIVES
ALKENES
AMINES
ANHYDRIDES
AROMATICS
CARBOXYLIC ACIDS
CHEMICAL COMPOSITION
CUMENE
ENERGY SOURCES
ETHYLENE
FOSSIL FUELS
FUELS
HYDROCARBONS
HYDROXY COMPOUNDS
LUBRICANTS
LUBRICATING OILS
MONOMERS
NITROGEN COMPOUNDS
OILS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM PRODUCTS
PHENOLS
SOLUBILITY
VISCOSITY