Abstract:
A composition of an oil of lubricating viscosity; a polymer, soluble in the lubricant composition and having a number average molecular weight of greater than 50,000; and a combustible solvent in which the remaining components of the lubricant are soluble, provides a composition suitable for lubricating a two-stroke cycle engine. The lubricant composition provides good lubricity with low smoke generation.
Abstract:
A novel compound comprises a chemical compound comprising or including a cyclic ring system such as an aromatic ring system, the compound carrying at least two substituents of the general formula (I) below on the ring system--A--NR.sup.1 R.sup.2 (I)where A is an aliphatic hydrocarbyl group that is optionally interrupted by one or more hetero atoms and that is straight chain or branched, and R.sup.1 and R.sup.2 are the same or different and each is independently a hydrocarbyl group containing 9 to 40 carbon atoms, optionally interrupted by one or more hetero atoms, the substituents being the same or different and the compound optionally being in the form of a salt thereof.Such compounds may be used as additives for improving the cold flow properties of crude oil, lubricating oil or fuel oil.
Abstract:
Mannich condensation products prepared by the condensation of a compound of the formula: ##STR1## wherein R.sub.1 is hydrogen, hydroxy, lower alkyl or lower alkoxy; R.sub.3 and R.sub.4 are independently hydrogen or lower alkyl; R.sub.5 is hydrogen, alkyl, phenyl, aralkyl, alkaryl, or an acyl group of the formula: ##STR2## wherein R.sub.6 is alkyl, phenyl, aralkyl or alkaryl; R.sub.7 is alkyl; u is an integer from 1 to 10; n is an integer from 5 to 100; and x is an integer from 0 to 10;with an aldehyde and a nitrogen base selected from ammonia, lower alkylamine, a polyamine and mixtures thereof.The Mannich condensation products and their fuel soluble salts are useful as fuel additives for the prevention and control of engine deposits.
Abstract:
Fluid flow friction loss of a hydrocarbon liquid is improved by adding a small amount of a copolymer of divinylbenzene and a linear alpha-olefin or a copolymer of vinyl siloxane and a linear alpha-olefin to the liquid hydrocarbon. A preferred catalyst for producing these materials is also described.
Abstract:
Modified liquid hydrocarbon fuel, in particular aviation kerosene, having a reduced tendency to undergo mist formation when subjected to shock, contains from 0.05% to 2% of its weight of polymer microgel particles of defined characteristics, the microgel polymer preferably being an addition copolymer of one or more main monomers with a minor proportion, e.g. 0.0005% to 0.1% of the total monomers, of one or more monomers which are multifunctional with respect to the polymerization reaction.
Abstract:
A method for dissolving in a liquid, mainly aliphatic, hydrocarbon fuel having a flash point not less than 90.degree. F. an additive comprising:(a) a specified polymer;(b) a specified hydroxylic carrier liquid for the polymer;(c) a specified amine;the concentration of the polymer in the fuel being in the inclusive range from 0.05% to 1% by weight, wherein the improvement comprises additionally adding to the fuel an additional component comprising one or more compounds selected from the following to improve dissolution of the additive in the fuel:(i) water: to an extent of from 0.1% to 1.25% by weight of the additive plus the additional component;(ii) glycerol: to an extent of from 0.1% to 1.25% by weight of the additive plus the additional component;(iii) ethylene glycol: to an extent of from 0.1% to 2% by weight of the additive plus the additional component; and(iv) carboxylic acid, preferably formic or acetic acid, to an extent of from 10% to 200% molar equivalent of the amount of amine present.
Abstract:
Three component additive combinations for improving the flow of distillate fuel oils comprise(A) a conventional distillate fuel flow improver(B) a lube oil pour depressant and(C) a polar compound other than certain specified nitrogen compounds which acts as an anti-agglomerant for wax particles in the fuel oil.
Abstract:
Hydrocarbon polymers comprising linear C.sub.18.sub.+ alkyl side chains are added to residual fuels to improve their pour point and flow characteristics. These polymers are prepared by polymerizing C.sub.20 -C.sub.40 alpha-olefins in the presence of a Ziegler-type catalyst to a number average molecular weight within the range between about 500 and 125,000. Particularly effective polymers are prepared from C.sub.3 -C.sub.18 alphaolefins and C.sub.20 -C.sub.40 alpha-olefins.
Abstract:
THE PRESENT INVENTION RELATES TO THE METHODS AND COMPOSITIONS FOR REDUCING THE FRICTIONAL PRESSURE LOSS ENCOUNTERED IN THE TURBULENT FLOW OF HYDROCARBON LIQUIDS THROUGH A CONDUIT. BY THE PRESENT INVENTION A FRICTIONAL PRESSURE LOSS ADDITIVE IS INTERMIXED WITH THE HYDROCARBON LIQUID, THE ADDITIVE BEING A HOMOPOLYMER OR A COPOLYMER OF THE MONOMER
R1-C(=CH2)-C6H4-R2
OR COPOLYMERS OF SUCH MONOMER AND CERTAIN STYRENE, ACRYLATE OR METHACRYLATE TYPE MONOMERS.