The invention pertains to oil soluble copolymers derived from ethylene and 1-butene which have a number average molecular weight between about 1,500 and 7,500, at least about 30 percent of all polymer chains terminated with ethylvinylidene groups, and ethylene-derived content of not greater than abo ...
Polymers (including copolymers) derived from one or more olefins, such including ethylene and C.sub.3 -C.sub.20 .alpha.-olefins such as propylene and 1-butene, which polymers have (a) an average ethylene sequence length, ESL, of from about 1.0 to less than about 3.0; (b) an average of at least 5 bra ...
The invention pertains to improved lubricating oil dispersants wherein a fractionating polymer is prepared prior to functionalization (e.g., in the Koch reaction) for making dispersant additives. In one aspect, it was discovered that by fractionating a polymer to remove light hydrocarbon and unreact ...
There is provided a process for preparing polybutenes having enhanced reactivity using a BF.sub.3 catalyst and an immediate quench procedure and controlled polymerization times of 12 to 40 minutes in combination with isobutylene conversions of at least 70%.
Polymers (including copolymers) derived from one or more olefins, such including ethylene and C.sub.3 -C.sub.20 .alpha.-olefins such as propylene and 1-butene, which polymers have (a) an average ethylene sequence length, ESL, of from about 1.0 to less than about 3.0; (b) an average of at least 5 bra ...
A method, composition and filter for reducing the presence of sludge or varnish precursors in a lubricating oil circulating within an internal combustion engine. The lubricating oil containing sludge or varnish precursors is contacted with discrete particles of an oil insoluble, oil wettable compoun ...
A copolymer comprising units of an unsaturated dicarboxylic monomer and an ethylene .alpha.-olefin macromer is disclosed. The macromer is an unsaturated ethylene .alpha.-olefin polymer comprising units of from ethylene and at least one .alpha.-olefin represented by the formula CH.sub.2 .dbd.CHR.sup. ...
The invention pertains to oil soluble copolymers derived from ethylene and 1-butene which have a number average molecular weight between about 1,500 and 7,500, at least about 30 percent of all polymer chains terminated with ethylvinylidene groups, and ethylene-derived content of not greater than abo ...
Novel dispersant mixtures are provided, having improved lubricating oil performance characteristics, comprising nitrogen or ester containing dispersants selected from the group consisting of oil soluble salts, amides, imides, oxazoline and esters or mixtures thereof, wherein a first dispersant compr ...
A saturated polymer having a terminal aldehyde or hydroxy substituent which may be used directly or in a derivative form as a dispersant for both fuel and lubricating oil compositions, wherein the saturated polymer has a M.sub.n of about 300 to 10,000, and is derived from a polyolefin which is deriv ...
