Abstract:
A composition that can be used as lubricant for high electric field including spark plug boots is disclosed. The composition comprises, or is produced by combining, a halogenated oil such as a perfluoropolyether, a polytrichlorofluoroethylene, a fluorosilicone, or combinations of two or more thereof; a basic thickener; and optionally an additional thickener in which the basic thickener is a metal hydroxide, a metal salt, an ammonium salt, or combinations of two or more thereof. The optional additional thickener is polytetrafluoroethylene, talc, silica, clay, boron nitride, metal soaps, titanium dioxide, polydimethylsiloxane, polyurea, polyurethane, or combinations of two or more thereof. Also provided is a spark plug boot that comprises the composition applied thereto.
Abstract:
The invention provides composites of organic polymeric compositions including a matrix of an organic polymer and a filler distributed throughout the matrix, the flier 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.sup.2 /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:
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 grease composition which, taking the whole as 100 parts by weight, is constituted by mixing together 60 to 95 parts by weight of a base oil, 3 to 25 parts by weight of a urea-based thickener and 0.05 to 5 parts by weight of a hindered amine-based anti-oxidant, is disclosed. The grease composition exhibits little change in state, even under high temperatures, and has superior oxidative stability.
Abstract:
The present invention aims to offer a lubricating composition with excellent heat resistance, mechanical stability, water resistance, corrosion resistance, load resistance and flame resistance. To this end the present invention suggests that from 2 to 68 % by weight of tricalcium phosphate relative to the total composition is added to a base oil, which may be a mineral oil and/or a synthetic oil. Surfactants are further added, and the whole is thoroughly mixed and kneaded to give a semi-solid lubricating composition. For the surfactants, non-ionic surfactants are most suitable, and fatty acid esters such as glycerine fatty acid esters, sorbitan fatty acid esters and sucrose fatty acid esters may be used. The amount used is from 0.2 to 18 % by weight relative to the total composition.
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.