Ethylene-C.sub.3-C.sub.10 alpha olefin copolymers, dispersants and lubricating oils/fuel compositions incorporating dispersants, and related methods are generally described herein. The copolymer may comprise ethylene-derived units and C.sub.3-C.sub.10 alpha-olefin-derived units. The C.sub.3-C.sub.10 alpha-olefin-derived units may have a carbon number from three to ten. For example, the C.sub.3-C.sub.10 alpha-olefin-derived units may be propylene-derived units.

Prior high pressure lubricant additives have contained short-chained chlorinated paraffins which are toxic and harmful to the environment. An environmentally friendly high pressure lubricant additives is provided by combining 74.5% to 84.5% by weight chlorinated alkanes, such as PAROIL 310 NR or PAROIL 353 NR, and from 15.5% to 25.5% by weight mineral oil. The high pressure lubricant additive can be added to motor oil, or other lubricants such as hydraulic fluid, cutting oil, gear box oil, automatic transmission fluid and penetrating oil

Lubricating oil compositions comprising neutral or low overbased alkaryl sulfonate calcium salts, hydrocarbyl polyalcohol, and zinc dialkyl dithiophosphate for use as tractor hydraulic fluids.

A composition comprises the reaction product of a dithiophosphate derivative and an amine. The reaction product is present in the composition in an amount of at least about 25 wt. %. The composition may include additional components. A method of forming the composition comprises the step of combining the dithiophosphate derivative and the amine to form the composition. A method of increasing thermal stability of a dithiophosphate derivative comprises the step of combining the dithiophosphate derivative and an amine. The dithiophosphate derivative can decompose to form hydrogen sulfide (H2S). However, the amine substantially prevents thermal decomposition of the dithiophosphate derivative. An example of the dithiophosphate derivative is 3-(di-isobutoxy-thiophosphorylsulfanyl)-2-methyl-propanoic acid. An example of the amine is ditridecyl amine. The composition can be used for a variety of applications. For example, the composition can be used as an antiwear compound/additive in lubricants, metalworking fluids, hydraulic fluids, etc.

Dispersions are prepared by dispersing a polymer precursor such as a polyol into a non-aqueous fluid. The resulting droplets of the polymer precursor is partially polymerized to produce liquid or partially gelled droplets, and then sized to a target particle size. The sized particles are then cured to form solid particles. The process allows for close control of particle size, allows for good control of temperature, and is amenable to batch, semi-continuous or even continuous operation. The resulting dispersions are useful as electrorheological fluids.

Object

There found a demand for ashless type novel lubricant which does not contain phosphorus, sulfur or metals and has high friction reducing effect, and suppresses the generation of deposit/sludge and the like, and furthermore can exhibit a detergency effect. It is an object to provide a novel lubricant capable of responding to this demand.

In addition, it was found out that it is required to demonstrate performances such as friction reduction effect and detergent effect under various low temperature and high temperature environments. In the present invention, it is also an object to provide a novel lubricant which can exhibit excellent performance even under various low temperature and high temperature environments even at the higher dosage.

Solution

A lubricating oil/grease additive characterized by containing a polyetheramine carboxylic acid salt represented by the general formula (1).

[R.sub.1COO.sup.][R.sub.2O(AO)m-X.sup.+](1)

Here, the carboxylic acid is a carboxylic acid having carbon number R.sub.1=7-21, preferably carboxylic acid having carbon number R.sub.1=7-19, more preferably oleic acid R.sub.1=C17.

R.sub.2 is a hydrocarbon group of carbon number from 8 to 50, A is an alkyl group of carbon number from 2 to 6, O is oxygen, m is an integer of 10 to 50, and X is an amino group or a substituted amino group.

A composition comprising a synthetic ester having a fatty acid mixture including: oleic acid in amount of at least about 85 wt % of the fatty acid mixture; linoleic acid in an amount of about 3 wt % of the fatty acid mixture or less; and linolenic acid in an amount of about 0.5 wt % of the fatty acid mixture or less.

The present invention is a lubricating oil composition containing, per 100 parts by mass of (A) an ester compound of a neopentyl polyol having 5 to 10 carbon atoms and a valence of alcohol of 2 to 6 and a linear unsaturated fatty acid having 16 to 22 carbon atoms, 0.1 to 1.5 parts by mass of a specific (B) acid phosphate ester amine salt, 0.01 to 0.25 parts by mass of a specific (C) succinic acid monoester, and 0.01 to 0.25 parts by mass of (D)N-oleoylsarcosine. According to the present invention, it is possible to provide a lubricating oil composition which is excellent in biodegradability, lubricity (anti-wear property), and rust preventive property against seawater, which is low in toxicity and accumulation to aquatic organisms, and further which is excellent in oxidation stability even in the presence of seawater.

Provided herein are compositions comprising at least one estolide compound of formula:

##STR00001##

in which n is an integer equal to or greater than 0; m is an integer equal to or greater than 1; R.sub.1, independently for each occurrence, is selected from optionally substituted alkyl that is saturated or unsaturated, and branched or unbranched; R.sub.2 is selected from hydrogen and optionally substituted alkyl that is saturated or unsaturated, and branched or unbranched; and R.sub.3 and R.sub.4, independently for each occurrence, are selected from optionally substituted alkyl that is saturated or unsaturated, and branched or unbranched. Also provided are uses of the compositions described herein.

The disclosure includes a grease composition comprising providing at least one polyol-ester base oil, at least one fatty-acid metal soap, at least one dimercaptothiadiazole derivative, and at least one sulfurous fatty-acid ester, the amount of active sulfur provided by the sulfurous fatty-acid ester at 150 C. according to the ASTM D1662 standard being greater than or equal to 0.18 wt % with respect to the total weight of the grease composition.