摘要:
A composition made by admixing a major amount of base oils of lubricating viscosity and minor amounts of additives. The additives can include a viscosity modifier, a dispersant, a friction modifier, an anti-oxidant, a suppressant, a tackifier, and thickeners. The dispersant can be a dissolved powered styrene-ethylene/propylene-block copolymer and the thickeners can be fumed silicia. The dispersants and the thickeners are pulverized and dissolved in the composition to provide for inhibition of oil separation during storage.
摘要:
In a particular embodiment, the invention concerns a lubricating grease having 70 to 95 percent by weight of a mixture that includes at least a first ester of fatty acid and of sorbitan, and at least a second ester of fatty acid and of polyoxyalkylated sorbitan. The esters are present in quantities by weight, relative to the weight of the mixture, of 10 to 90 percent and 90 to 10 percent respectively. The grease also includes from 5 to 30 percent by weight of at least one thickening agent.
摘要:
Elastic solids having reversible stress-induced fluidity are prepared, e.g., by combining liquid formulations with a crystalline mixed metal hydroxide conforming substantially to the formula Li.sub.m D.sub.d T(OH).sub.(m+2d+3+n.multidot.a) (A.sup.n).sub.a .multidot.xH.sub.2 O where m is amount of Li, d is amount of divalent metal D, T is a trivalent metal, A represents at least one anion or negative-valence radical of valence n and a is the amount of A, and xH.sub.2 O represents excess waters of hydration, if any. These make useful coatings. The instantly reversible fluidization of these unique elastic solids may be expressed as: .sigma.=k.sub..alpha. .epsilon. when .epsilon. F, (this equation represents a generalized form for the usual theological equations); for a cycle of .epsilon., -xF
摘要:
The present invention provides a grease for copper electrical contacts having excellent properties which comprises polyol complex ester base oil and a specific amount of particular additives, i.e. quaternary ammonium salt-containing clay mineral, secondary aromatic amine antioxidant and a copper deactivator selected from the group consisting of benzotriazoles, thiodiazoles, and N,N'-disalicylidene- 1,2-diaminopropane. The grease according to the present invention can be applied effectively to a copper slide contact under both low temperature (ca.- 40.degree. C.) and high temperature (ca. 160.degree. C.) conditions.
摘要:
The invention is an improved grease composition comprising a major proportion of a grease, a hydroxy-containing soap thickener and a minor amount of a compound prepared by reacting a boron compound with an organic compound containing oxygen, sulfur and/or nitrogen or mixtures thereof.
摘要:
A water washable thermally conductive grease useful for thermal coupling of electronic chips and heat sinks in electronic modules comprises a hydrophilic liquid polymer carrier, an antioxidant, and up to 90 weight percent of a microparticulate thermally conductive filler. In a preferred embodiment, the thixotropic dielectric composition further comprises an ionic surfactant to promote wetting/dispersion of the microparticulate filler. The thermally conductive grease is non-corrosive, resistant to shear induced phase destabilization and capable of being washed from module surfaces with aqueous solutions. Substitution of the present hydrophilic based greases for art-recognized solvent washable greases eliminates use of non-aqueous solvents in electronic module processing/reprocessing operations.
摘要:
The invention is a grease composition comprising a major proportion of a grease, a hydroxy-containing soap thickener and a minor amount of a compound prepared by reacting a boron compound with an organic compound containing oxygen, sulfur and/or nitrogen. Sulfur and/or phosphorous compounds are also incorporated into the composition.
摘要:
A thermally conductive silicone grease composition comprising at least the following components: an organopolysiloxane (A) represented by the following general formula: [wherein R1 designates identical or different univalent hydrocarbon groups; X designates identical or different univalent hydrocarbon groups or alkoxysilyl-containing groups of the following general formula: —R2—SiR1a(OR3)(3-a) (wherein R1 designates the previously mentioned groups; R2 designates oxygen atoms or alkylene groups; R3 designates alkyl groups; and ‘a’ is an integer ranging from 0 to 2); and ‘m’ and ‘n’ are integers equal to or greater than 0, respectively]; a thermally conductive filler (B); and an organopolysiloxane (C) having silicon-bonded hydrogen atoms on both molecular terminals and in the molecular chains; is characterized by excellent resistance to heat and reduced oil bleeding.
摘要:
A subject of the invention is a lubricating grease, characterized in that it contains: from 70 to 95% by weight of a mixture comprising at least a first ester of fatty acid and of sorbitan and at least a second ester of fatty acid and of polyoxyalkylated sorbitan, these esters being present in quantities by weight, relative to the weight of the said mixture, of 10 to 90% and 90 to 10%, respectively; and from 5 to 30% by weight of at least one thickening agent. A subject of the invention is also a preparation process for a grease according to the invention, as well as use as a lubricant of such a grease. A subject of the invention is also a vehicle wheel containing a grease according to the invention.
摘要:
An organophilic clay thickener for natural oil systems comprising the reaction product of a smectite-type clay and an organic cation in an amount of from about 75% to about 150% of the cation exchange capacity of the smectite-type clay. Said organophilic clay comprising at least one naturally occurring, resulting in increased efficiency as a thickener in natural oil systems.