Abstract:
A grease composition comprising a grease containing, in a base oil thereof, from 2 to 40% by weight, based on the total composition, of tricalcium phosphate [Ca.sub.3 (PO.sub.4).sub.2 ], the grease further containing (A) from 0.5 to 10% by weight, based on the total composition, of a molybdenum dialkyldithiocarbamate sulfide and (B) from 0.1 to 5% by weight, based on the total composition, of at least one of a zinc dialkyldithiophosphate and triphenyl phosphorothionate. The grease composition is excellent in mechanical stability, heat resistance, extreme pressure properties, and wear resistance.
Abstract:
Lubricating grease having high dropping point, superior stability against oxidation and long life is obtained by having a thickener contained in grease, said thickener comprising the three components:a. lithium soap of C.sub.12-24 hydroxyfatty acid,b. lithium phosphate salt produced from phosphoric or phosphorous acid ester andc. dilithium borate.
Abstract:
Useful compositions are prepared by incorporating into organic materials, crystalline lithium aluminates which conform substantially to the empirical formula(LiA.sub.x).sub.y.2Al(OH).sub.3.nH.sub.2 Owhere A represents one or more anions and/or negative-valence radicals,where x represents a quantity of A ions and/or radicals sufficient to substantially satisfy the valence requirements of the Li,where y is a numerical value sufficient to maintain the crystalline structure,and where n represents the number of waters of hydration, if any.
Abstract:
Crystalline aluminates conforming substantially to the general formula LiR.2Al(OH).sub.3, CaR(A).2Al(OH).sub.3, or ZnR(A).2Al(OH).sub.3, where R is an organic acid of C.sub.6 -C.sub.22 and A, when present, is an inorganic anion, are found to improve the coefficient of friction and antiwear properties of lubication fluids subjected to shearing, rubbing, or grinding forces at elevated pressure.
Abstract:
A thermally conductive silicone grease composition comprises: (A) an organopolysiloxane represented by the following general formula: wherein each R 1 is independently selected from monovalent hydrocarbon groups, each X is independently selected from monovalent hydrocarbon groups or alkoxysilyl-containing groups of the following general formula: -R 2 -SiR 1 a (OR 3 ) (3-a) wherein R 1 is defined as above, R 2 is an oxygen atom or an alkylene group, R 3 is an alkyl group, a is an integer ranging from 0 to 2, m is an integer equal to or greater than 0, and n is an integer equal to or greater than 0; (B) a thermally conductive filler; and (C) an aluminum-based or titanium-based coupling agent. The composition exhibits excellent heat resistance and reduced oil bleeding.
Abstract:
Fluorinated lubricants of formula T-O-[A-B] z -[A-B'] z' -A-T' (I) wherein: A = -(X) a -O-A'-(X') b - A' is a perfluoropolyether chain comprising units (CF 2 O), (CF 2 CF 2 O), (CF 2 CF 2 CF 2 O), (CF 2 CF 2 CF 2 CF 2 O); X, X' = -CF 2 -, -CF 2 CF 2 -; a, b = 0 or 1; B derives from olefins, of which at least one homopolymerizable by radical route, of formula: -[(CR 1 R 2 -CR 3 R 4 ) j (CR 5 R 6 -CR 7 R 8 ) j ' ]- (Ia) wherein j = 1-5, j'= 0-4 and 2 1 -R 8 = halogen, H, C 1 -C 6 (per)haloalkyl, C 1 -C 6 alkyl, C 1 -C 6 oxy(per)-fluoroalkyl; z ≥ 2; z' is 0 or an integer; z, z' are such that the number average molecular weight of the polymer of formula (I) is in the range 500-500,000; B'= (Ia) but at least one of R 1 -R 8 has a meaning different than that in B and 2 ≤(j+j') 1 -C 3 perfluoroalkyl, C 1 -C 6 alkyl and compositions thereof.
Abstract:
Organosilicone pastes and greases including at least one oily diorganopolysiloxane polymer with a dynamic viscosity at 25 DEG C of at least 500 mPa.s, and at least one alkali-metal or alkaline-earth metal carbonate, but no actual thixotropic agent, wherein said carbonate has a particle size of at most 0.5 mu m and a high BET specific surface area of more than 5 m /g, and is present in an amount of at least 20 wt % based on the total composition. The preparation method is carried out at a low temperature, e.g. 5-40 DEG C.
Abstract:
The invention provides composites of organic polymeric compositions including a matrix of an organic polymer and a filler distributed throughout the matrix, the filler being present in the matrix substantially as separate particles, each about the fundamental particle size of the filler. The fillers are unique mixed metal hydroxide compositions that are obtainable in sub-micron size particles. These particles are layered and have a BET specific surface area in excess of about 100 m /g. An anion of the particulates is selected to be compatible with the organic polymer thereby providing ease of dispersion of the filler particles throughout the polymer matrix.
Abstract:
Die vorliegende Erfindung betrifft Schmierfettzusammensetzungen, umfassend (a) wenigstens ein hochviskoses, fluoriertes Öl miteiner Viskosität von 500 bis 1500 mm 2 /s,(b) Bornitrid und (c) ein Bindemittel,das ausgewählt ist unter Bentonit,Alkalimetallphosphaten, Aluminiumphosphaten, Alkalimetallsilikaten, Erdalkalimetallsilikaten, Aluminiumsilikaten, Erdalkalimetallcarbonaten, Calciumborat, Siliciumdioxid, Titandioxid, Aluminiumoxidund Mischungen davon.Die Schmierfettzusammensetzungenfinden insbesondere im Hochtemperaturbereich, beispielsweise für die Schmierung von Ofenauszugsschienen, Anwendung.
Abstract:
A lubricating grease containing about 75 to 85 % by weight of a liquid perfluoropolyether and about 15 to 25 % by weight of a particulate boron nitride, preferably monomodal boron nitride having a particle size of about 7 to 10 microns; use of the lubricating grease for lubricating structures subjected to an oxygen-enriched environment and devices containing such lubricated structures.