摘要:
Reaction of a carboxylic acid-containing polymer with certain aromatic amines and polyols results in ester containing dispersant viscosity modifiers with improved soot handling performance in heavy-duty diesel engines, compared with non-ester containing dispersants.
摘要:
A carboxylic derivative composition derived from a carboxylated isobutylene-polyene copolymer having n ranging from about 200 to about 10,000, said copolymer having thereon from about 0.8 to about 7 moles per mole of copolymer of groups derived from at least one a,ss-unsaturated carboxylic acid or reactive equivalent thereof, reacted with at least one of (a) amines characterized by the presence within their structure of at least one condensable H-N
摘要:
Hydrocarbyl substituted carboxylic compositions and derivatives thereof useful as dispersant/viscosity improvers for lubricating oil and fuel compositions. Carboxylic compositions are derived from (A) a hydrocarbon polymer having Mn ranging from about 20,000 to about 500,000, and (B) an alpha , beta -unsaturated carboxylic compound prepared by reacting (1) an active methylene compound of the formula (I), and (2) a carbonyl compound of the general formula (II), wherein R is H or hydrocarbyl and R is a member of the group consisting of H, hydrocarbyl and (III), wherein each R' is independently R or OR and each R is, independently, H or a hydrocarbyl group; and lower alkyl acetals, ketals, hemiacetals and hemiketals of the carbonyl compound (2). Carboxylic derivative compositions are obtained by reacting the carboxylic compositions with a reactant selected from the group consisting of (a) amines characterized by the presence within their structure of at least one condensable H-N
摘要:
A dicarboxylic diester in which the two carbonyl groups are bonded to adjacent carbon atoms of the ring and which has the following properties (1) to (9). (1) total acid value: 0.05 mg KOH/g or lower. (2) sulfated ash content: 10 ppm or lower. (3) sulfur content: 20 ppm or lower. (4) phosphorus content: 20 ppm or lower. (5) peroxide number: 1.0 meq/kg or lower. (6) carbonyl value: 10 or lower. (7) volume resistivity: 1x10 OMEGA .cm or higher. (8) hydroxyl value: 3 mg KOH/g or lower. (9) water content: 100 ppm or lower.
摘要:
The invention provides dispersants and dispersant viscosity index improvers which include polymers of conjugated dienes which have bee hydrogenated, functionalized, optionally modified, and post treated. The dispersant substances include a copolymer of two different conjugated dienes. The polymers are selectively hydrogenated to produce polymers which have highly controlled amounts of unsaturation, permitting highly selective functionalization. The polymers may be blended with lower molecular weight components. Also provided are lubricant fluids, such as mineral and synthetic oils, which have been modified in their dispersancy and/or viscometric properties by means of the dispersant substances of the invention. The addition of minor amounts of lower molecular weight components improves compatibility and reduces haze. Also provided are methods of modifying the dipsersancy and/or viscometric properties of lubricating fluids such as mineral and synthetic lubricating oils. The dispersant substances may also include a carrier fluid to provide dispersant concentrates.
摘要:
The invention concerns a lubricating fluid comprising: 1) a predominant amount of oil with appropriate lubricating viscosity; and 2) between 0.03 % and 0.06 % of a filterability-enhancing agent corresponding to the following formula: R-Z in which Z represents: (i) a succinic ester acid comprising the reaction product of succinic anhydride and an aliphatic polyhydric alcohol; or (ii) a succinimide comprising the reaction product of succinic anhydride and a polyamine, said reaction product being subjected to a postcure with a cyclic carbonate, boric acid or a boric acid derivative; and R represents a polyolefin having a molecular weight (Mn) of 500 to 2500 and a Mw/Mn ratio of 1 to 5. This fluid is particularly suitable for hydraulic systems and has improved filterability characteristics.
摘要:
Copolymers and functionalised copolymers comprising ethylene units, in combination with non ethylene copolymer derivatives, give improved engine piston cleanliness when used as lubricating oil additives.
摘要:
This invention relates to shear stable multigrade oils for crankcase lubrication of gasoline and diesel engines which oils are substantially free of viscosity modifier additives and comprise a detergent inhibitor package of lubricating oil additives, which package includes an ashless dispersant comprising an oil soluble polymeric hydrocarbon backbone having functional groups in which the hydrocarbon backbone is derived from an ethylene alpha-olefin (EAO) copolymer or alpha-olefin homo- or copolymer an M n of from 500 to 7000. Such multigrade crankcase oils without viscosity modifiers are more economical and may provide better diesel performance and seal compatibility. The oils are also substantially shear stable and may be used in turbocharged engines and racing engines, with reduced mechanical breakdown of the oil.
摘要:
Polymers of olefinically unsaturated hydrocarbons suitable for use as intermediates for use in the manufacture of lubricating or fuel oil additives, are prepared from reactants in different phases by reacting the reactants in a reaction region defined by adjacent surfaces between which there is relative movement or in a thin film on a surface over which they move.