Abstract:
Copolymers of average number molecular weight from about 300 to 5,000 comprising recurrent units originating (A) from alpha olefins, (B) from .alpha.,.beta. unsaturated .alpha., .gamma. dicarboxylic compounds, (C) from unsaturated acid esters of 1,2-diols, optionally etherified or esterified, and (D) optionally from acrylic esters, the proportions of the recurrent units being 5-60% for (A), 10-70% for (B), 10-60% for (C) and 0-60% for (D), at least one of recurrent units (A), (B) and/or (C) comprising at least 12 carbon atoms, and at least 10% of the recurrent units of said copolymer being (B) recurrent units of N-substituted imide type. These copolymers form additives useful to lower the pour point of middle distillates, particularly of gas-oils. The use of said additives at a concentration from 0.001 to 2% by weight results in a substantial decrease of the pour point of the treated middle distillates.
Abstract:
Improved gasoline compositions containing a minor amount of a polyalphaolefin having a viscosity at 100.degree. C. from 2 to 20 centistokes, and optionally also an aliphatic polyamine, an alkali or alkaline earth metal salt of a succinic acid derivative, and/or a polyolefin; together with a concentrate for the production of such gasoline composition and a method of operating a spark-ignition engine using such gasoline composition.
Abstract:
The incorporation of minor amounts of an additive prepared from the reaction products of a long chain oligomeric alkylsuccinic anhydride or the corresponding acid, a mono or polyfunctional epoxide and a long chain secondary amine provide improved cloud point, pour point and filterability for diesel and heating fuels.
Abstract:
Oil-soluble, derivatized ethylene copolymers derived from about 15 to 90 wt. % ethylene, and one or more C.sub.3 to C.sub.28 alpha-olefins, e.g. propylene, which are grafted, preferably solution-grafted under an inert atmosphere and at elevated temperatures and in the presence of a high-temperature decomposable free-radical initiator, with an ethylenically-unsaturated dicarboxylic acid material and thereafter reacted with a polyamine having at least two primary amine groups, and a carboxylic acid to form carboxyl-grafted polymeric imide, usually maleimide, derivatives are subsequently reacted with a C.sub.12 to C.sub.18 hydrocarbyl substituted dicarboxylic acid anhydride, preferably a C.sub.12 to C.sub.18 hydrocarbyl substituted succinic anhydride, to yield an oil-soluble stable imide of said carboxyl-grafted copolymeric imide whereby oil solutions thereof are characterized by minimal viscosity change over an extended period of time.
Abstract:
Reaction products of olefins, elemental sulfur, hydrogen sulfide, water and nitrogen-containing polymers provide multifunctional additives having antiwear/extreme pressure and thermal and oxidative stability characteristics for lubricants and fuels.
Abstract:
Fuel compositions for internal combustion engines are provided which contain deposit control additives which maintain cleanliness of intake systems without contributing to combustion chamber deposits. The additives are polyloxyalkylene carbamates comprising a hydroxy- or hydrocarbyloxy-terminated polyloxyalkylene chain of 2-5 carbon oxyalkylene units bonded through an oxycarbonyl group to a nitrogen atom of a polyamine having from 2 to 10 amine nitrogens and from 2 to 40 carbons with a carbon:nitrogen ratio between about 1:1 and 10:1.
Abstract:
Long-chain, amide-containing esters of carboxylic acid-containing polymers as flow improvers in hydrocarbon oils are disclosed and claimed. These fluidity improvers are useful in hydrocarbon oils, such as crude oils, residual fuel oils and middle distillate fuels. The novel materials of the present invention are also useful as pour point depressants in various hydrocarbon oils, for example, in crude oils, residual fuel oils and middle distillate fuels.
Abstract:
A hydrocarbon mixture containing modified polycyclic aromatic compounds or modified PAC having a chemical structure of mean molecular weight ranging between 300 and 10,000, the chemical structure being represented by formula (I): (A)x(PAC)y, wherein x and y are integers corresponding to the numbers of A or PAC units, selected such that x/y is equal to at least 1, preferably ranging between 1 and 50 and wherein A is a unit corresponding to a polymerizable monomer containing between 2 and 60 carbon atoms.
Abstract:
A composition for use as an additive for fuels or lubricants. The composition includes a reaction product of a treated amine and a compound selected from the group consisting of hydrocarbyl succinic anhydrides, Mannich adducts derived from hydrocarbyl-substituted phenols reacted with formaldehydes, ethylene-propylene copolymers grafted with ethylenically unsaturated carboxylic groups, copolymers of unsaturated acids and polyolefins, and acid or ester functionalized hydrocarbon polymers. The reaction product is oil soluble and has a number average molecular weight ranging from about 900 to about 50,000 as determined by gel permeation chromatography. The treated amine includes an aliphatic or aromatic amine containing at least one primary or secondary amino group reacted with an aliphatic or aromatic nitrile and hydrogen.