Abstract:
A water-glycol hydraulic fluid comprising a higher aliphatic acid in a ratio of 2 to 15% by weight, alkali hydroxide in an amount less than an equivalent amount of the higher aliphatic acid, and an organic alkaline compound containing nitrogen atoms in an amount sufficient to adjust the pH of the whole fluid to 10 to 12 is desclosed. This hydraulic fluid has excellent wear resistance and also excellent sludge solubility.
Abstract:
An electro-rheological fluid comprises an electrically insulating liquid as the dispersion medium, a porous solid particulate material as the dispersed phase, at least one member selected from water and polyhydric alcohols, and at least one member selected from acids, bases and salts.
Abstract:
This invention relates to a dispersing agent for use in dispersing a finely divided solid powder in a nonaqueous dispersion medium and a dispersion prepared by using the dispersing agent. The dispersing agent of this invention is a low acid value lanolin fatty acid and/or a salt of the same. By means of this dispersing agent, there can be easily obtained a homogeneous and stable nonaqueous dispersion from which the incorporated solid particles will not separate out or settle even on prolonged standing. Therefore, this dispersing agent can be used advantageously in a broad range of applications such as coatings, dyes, pigments, inks, fuels, lubricating materials and so on.
Abstract:
1. Verbindungen der Formel I worin n gleich 1 bis 100 ist, Y -N(R 3 )-, -S- oder -S-R 4 -S-darstellt, R 1 C 2 -C s -Alkylen ist, das gegebenenfalls durch 1 bis 3 Ether-Sauerstoffatome unterbrochen sein kann, R 2 Wasserstoff, unsubstituiertes oder durch 1 bis 5 Hydroxygruppen substituiertes C 1 -C 8 -Alkyl, das gegebenenfalls durch-O-,-S-oder-N(R 5 )-einfach oder mehrfach unterbrochen sein kann, bedeutet, mit der Massgabe, dass, wenn Y-S- und n gleich 1 sind, R 2 nicht unsubstituiertes C 1 -C 8 -Alkyl sein kann, ferner R 3 Wasserstoff, unsubstituiertes oder durch 1 bis 5 Hydroxygruppen substituiertes C 1 -C 8 -Alkyl darstellt, das gegebenenfalls durch -0-, -N(R 5 )- oder -S- einfach oder mehrfach unterbrochen sein kann, R 4 unsubstituiertes oder durch -OH einfach oder mehrfach substituiertes C 2 -C 8 -Alkylen, das gegebenenfalls durch -0-oder -S-einfach oder mehrfach unterbrochen sein kann, bedeutet, sind als Hochdruck- und Verschleissschutz-Additive für polare funktionelle Flüssigkeiten sehr gut geeignet.
Abstract:
Novel compositions useful as fluid gelling agents, especially for use in subterranean applications such as drilling fluids, are prepared by reacting an aqueous dispersion of a clay, such as bentonite, with an aqueous gel of a monodispersed mixed metal layered hydroxide.
Abstract:
Des additifs à base de soufre, essentiellement exempts de soufre labile, sont utilisés dans des lubrifiants et dans des fluides fonctionnels pour éliminer de manière sensible le problème posé par la corrosion des métaux et la dégradation des élastomères se produisant généralement avec les additifs à base de soufre.
Abstract:
A water-in-oil microemulsion comprises: (a) an oil phase (b) an aqueous phase (c) at least one emulsifier, and (d) at least one aliphatic diol of the formula
where R and R" are independently hydrogen or C 1 -C 18 aliphatic groups, each R' is independently hydrogen or a C,-C 20 aliphatic group, n is an integer of 1-4, with the provisos that the number of carbon atoms in R is different than the number of carbon atoms in R", and the total number of carbon atoms in I is from 5 to about 25. The aliphatic diol (1) is preferably 2-ethyl-1. 3-hexanediol. The microemulsions are useful as fire-resistant hydraulic fluids.
Abstract:
L'agent d'amortissement pateux sert a amortir les oscillations mecaniques et/ou acoustiques. L'agent renferme comme compose minimal une substance solide finement divisee ou un melange de substances solides finement divisees, comme phase liquide, une huile de silicone, un polyglycol, une huile minerale et/ou un ester d'acide carbonique aliphatique sature ou aromatique, un agent pour elever l'activite de la couche-limite ou un agent mouillant, un silicate de magnesium et/ou d'aluminium et/ou un dioxyde de silicium finement divises comme stabilisateur de viscosite et le cas echeant une petite quantite d'agent antioxydant. L'agent d'amortissement est utilise dans differents dispositifs d'amortissement hydrauliques ou des amortisseurs de choc de vibrations industriels.
Abstract:
The disclosure relates to improved gel/grease compositions as well as grease compositions capable of imparting improved corrosion resistance. The grease includes a silica/silicate mixture that can imparts a relatively high pH and corrosion resistant properties to the grease.
Abstract:
This invention is to provide a conductive grease which is less to decrease conductivity as a time passes. The conductive grease comprises abase oil, a thickener, a conductive solid powder, and at least one kind of a wear inhibitor, an extreme pressure agent and an oiliness agent, wherein an amount of the conductive solid powder added is 0.1 to 10 wt %, and an amount of the at least one kind of a wear inhibitor, an extreme pressure agent and an oiliness agent added is 0.1 to 10 wt %. Further, the conductive grease comprises the base oil and at least one of conductive additives, and the conductive additives are fibrous carbon, metallic particle, metallic compound particle and carbon nano-tube. The conductive grease to be packed into the rolling bearing comprises conductive fine particles such as carbon black and has an oil separation degree of 2% or lower. A ball bearing to be favorably used at high temperature comprises an inner race and an outer race, and a plurality of balls freely rotating between both races, and the conductive grease packed into a space defined between both races and holding the plural balls therein, and the conductive grease comprises the base oil, a thickener comprising fluorine compound or silicone compound and 0.2 to 10 wt % of the carbon black.