摘要:
The present invention relates to the use of polyamines having at least one terminal secondary or tertiary amine function as a detergent additive for fuels and lubricants; to additive concentrates comprising such polyamines; to fuels and lubricants additized with these polyamines and to processes for their preparation.
摘要:
An improved disk drive system using a non-ferrofluid conductive lubricant is disclosed. In the disk drive system, there is a plurality of critically spaced magnetic disks rotated by a disk motor. A spindle shaft, which is retained by the spindle sleeve, couples to the disk motor and to the plurality of magnetic disks for rotation. The spindle shaft and spindle sleeve uses a bearing, which is lubricated by a non-ferrofluid conductive lubricant. The lubricant is used to prevent electrostatic charge build up during operation of the disk drive system. The lubricant may be either a non-polar oil or a ball bearing grease and further having either a metal caged fullerenes compound, STADIS-450, ASA-3, or Polyfloe 130. One particular type of lubricant is an emeraldine salt of polyanilin produced according to the steps of first reacting a solution of HCL and ammonium persulfate into a solution of HCL and analine to form a polymer. Next, the polymer is mixed with ammonium hydroxide and then is prepared to have a molecular weight of 1,000-20,000. Finally, the polymer is mixed with dodecyl benzylsulfonc acid or camphor sulfonic acid until the emeraldine salt is formed.
摘要:
An improved disk drive system using a non-ferrofluid conductive lubricant is disclosed. In the disk drive system, there is a plurality of critically spaced magnetic disks rotated by a disk motor. A spindle shaft, which is retained by the spindle sleeve, couples to the disk motor and to the plurality of magnetic disks for rotation. The spindle shaft and spindle sleeve uses a bearing, which is lubricated by a non-ferrofluid conductive lubricant. The lubricant is used to prevent electrostatic charge build up during operation of the disk drive system. The lubricant may be either a non-polar oil or a ball bearing grease and further comprising either a metal caged fullerenes compound, STADIS-450, ASA-3, or Polyfloe 130. One particular type of lubricant is an emeraldine salt of polyanilin produced according to the steps of first reacting a solution of HCL and ammonium persulfate into a solution of HCL and analine to form a polymer. Next, the polymer is mixed with ammonium hydroxide and then is prepared to have a molecular weight of 1,000-20,000. Finally, the polymer is mixed with dodecyl benzylsulfonc acid or camphor sulfonic acid until the emeraldine salt is formed.
摘要:
Epoxides are converted selectively to the corresponding carbonyl-containing compounds by reacting the epoxide with an oxidizing agent, typically hydrogen peroxide, in a liquid aqueous/organic two-phase system comprising:(a) an organic phase substantially containing the epoxide, and(b) an aqueous acidic phase substantially containing the oxidizing agent, in the presence of an onium compound capable of achieving phase partitioning and a catalytic system comprising a first catalyst component which is at least one element selected from tungsten, molybdenum, vanadium and chromium, or a compound containing at least one of the aforesaid elements, and a second catalyst component which is a phosphorus (V) acid or a species convertible to a phosphorus (V) acid.
摘要:
The present invention is directed to a dispersant additive comprising at least one adduct of (A) a polyolefin of 300 to 10,000 number average molecular weight substituted with at least 0.5 (e.g., from about 1 to 4) monocarboxylic acid producing moieties (preferably acid or ester moieties) per polyolefin molecule, (B) an amino-amine or thioamide-amine characterized by being a reaction product of at least a polyamine and an alpha, beta-unsaturated compound of the formula: ##STR1## wherein X is sulfur or oxygen, Y is --OR.sup.4, --SR.sup.4, or --NR.sup.4 (R.sup.5), and R.sup.1, R.sup.2, R.sup.3, R.sup.4 and R.sup.5 are the same or different and are hydrogen or substituted or unsubstituted hydrocarbyl.
摘要:
Disclosed is an at least partially continuous process for the preparation of at least one oligomer and/or polymer comprising at least one diphenylamine repeat unit and optionally at least one phenyl α-naphthylamine repeat unit.
摘要:
Disclosed is a magnetic dendrimer compound and a method for preparing the magnetic dendrimer compound, the molecular formula of which is shown in formula (I): Γ(CH2)3N(2n+1−1)R1(2n+2−2)R2(2n+1)(I). In this formula, Γ indicates magnetic particles coated with SiO2 on a surface thereof, the magnetic particles having been modified by a silane coupling agent; (CH2)3N(2n+1−1)R1(2n+2−2) is a dendritic group, and R2(2n+1) is a lipophilic group, with 0≦n≦100. Further disclosed is a lubricant comprising the magnetic dendrimer compound.
摘要:
The present disclosure relates to new and optimized processes for the preparation of micro- and nano-scale capsules containing lubricant chemical additives. The present disclosure also relates to micro- and nano-scale capsules prepared by such processes, which are useful in a variety of applications, including automotive lubricants, diesel lubricants, industrial lubricants, metal-working lubricants, coolants, and process fluids. Micro- and nano-scale capsules prepared as described herein have the required properties that such capsules need to exhibit in order to function effectively and meet the requirements imposed by engine lubrication conditions. The microcapsules may be dispersed in a lubricating oil such that the lubricant exhibits improved stability and anti-wear performance, thereby improving engine fuel efficiency and performance.
摘要:
Disclosed are compounds represented by structural formula (I): methods of producing compounds represented by structural formula (I). and their use in inhibiting oxidation in an oxidizable material.
摘要:
Disclosed are compounds represented by structural formula (I): methods of producing compounds represented by structural formula (I). and their use in inhibiting oxidation in an oxidizable material.