Haze-free polymer additives for fuels and lubricants
A process for preparing a substantially haze-free mineral hydrocarbon oil solution concentrate composition is described which comprises a mineral oil of lubricating viscosity and from about 0.1 to 50 wt.% based upon the total weight of the composition of a dispersant-viscosity index improver material having haze forming tendencies. The dispersant-viscosity index improver has been formed by grafting a copolymer consisting of ethylene and propylene in the presence of a free radical initiator with (a) a vinyl containing nitrogen monomer selected from the group consisting of vinyl pyridine, lower alkyl (C/sub 1/C/sub 18/) substituted C-vinyl pyridine and N-vinyl pyrrolidine or, (b) a monomer system comprising maleic anhydride and monomers copolymerizable therewith being alpha-beta mono-ethylenically unsaturated monomers containing up to 10 carbon atoms and post reacting the graft with a polyamine or, (c) maleic anhydride, which graft is subsequently reacted with a polyamine, polyol, or hydroxy amine. The process consists essentially of treating the concentrate composition with about 0.5 to 25% by wt., based upon the weight of the composition of an oil soluble alkyl hydroxy benzene compound, the compound containing 1-3 alkyl groups, each containing about 8-12 carbon atoms and the compound having 1-3 hydroxy groups, at a temperature of about 50/sup 0/C to 150/sup 0/C.
- Assignee:
- Exxon Research and Engineering Co., Florham Park, NJ
- Patent Number(s):
- US 4707285
- OSTI ID:
- 5889859
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
ADDITIVES
ALKENES
ALKYL RADICALS
AMINES
ANHYDRIDES
AROMATICS
AZINES
AZOLES
BENZENE
CARBOXYLIC ACIDS
CHEMICAL COMPOSITION
CHEMICAL PREPARATION
CHEMICAL REACTIONS
COPOLYMERS
DICARBOXYLIC ACIDS
ETHYLENE
FUEL ADDITIVES
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
LUBRICANTS
MALEIC ACID
MINERAL OILS
MONOMERS
OILS
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC POLYMERS
OTHER ORGANIC COMPOUNDS
POLYAMIDES
POLYMERIZATION
POLYMERS
PROPYLENE
PYRIDINE
PYRIDINES
PYRROLES
PYRROLIDINES
RADICALS
SYNTHESIS
VINYL RADICALS
VISCOSITY