Abstract:
Crystalline aluminates of the formula: I. (LiAx)y.2Al(OH)3.nH2O II. Li(R)v_r.2Al(OH)3.nH2O, or III. Mm(R)v_r.(D)w_z2Al(OH)3.nH2O wherein A is one or more anions and/or negative-valence radicals or mixtures thereof; wherein, in formula I, x is a quantity of A ions or radicals sufficient to substantially satisfy the valence requirements of Li; wherein n is zero or the number of waters of hydration; wherein y is a numerical value at least sufficient to maintain the crystalline structure; wherein R is a monocarboxylic acid or dicarboxylic acid of C6 C22, including those which are OH substituted; wherein r is greater than zero and represents the number of R ions in the molecule; wherein v is the valence of R, being monovalent or divalent; wherein M is divalent Zn or Ca cations; wherein D represents inorganic anions of valence 1-3, represented by w; wherein z is equal to or greater than zero and represents the number of D anions; wherein, in formula II, vr represents an amount of R anions to substantially satisfy the valence requirements of Li; wherein, in formula III, r>z and (vr + wz) represents an amount of combined anions, R and A, to substantially satisfy the valence requirements of M; with m representing the number of divalent M cations and having a numerical value in the range of 1 to 4, are found to improve the coefficient of friction and antiwear properties of lubrication fluids subjected to shearing, rubbing, or grinding forces at elevated pressure. Also, useful compositions are prepared by incorporating into organic materials, crystalline lithium aluminates of formula I.
Abstract:
Die Erfindung betrifft ein Hochtemperaturfett, das unter anderem in Wellpappenanlagen eingesetzt wird und ausschließlich fluorfreies Grundöl enthält.
Abstract:
A thermally conductive silicone grease composition comprising at least the following components: an organopolysiloxane (A) represented by the following general formula : [wherein R 1 designates identical or different univalent hydrocarbon groups; X designates identical or different univalent hydrocarbon groups or alkoxysilyl-containing groups of the following general formula: -R 2 -SiR 1 a (OR 3 ) (3-a) (wherein R 1 designates the previously mentioned groups; R 2 designates oxygen atoms or alkylene groups; R 3 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.
Abstract:
A greasy silicone composition which comprises: (A) a liquid organopolysiloxane comprising 80 to 96.5 mol% siloxane units represented by the formula R2SiO2/2, 1.0 to 10.0 mol% siloxane units represented by the formula RSiO3/2, and 0.25 to 10.0 mol% siloxane units represented by the formula R3SiO1/2 (in the formulae, R's are the same or different and each is a monovalent hydrocarbon group); and (B) a thickener. The composition can contain the thickener in a large amount and has excellent heat resistance.
Abstract:
Low bleed silicone grease compositions are prepared by blending high viscosity silicone oils with filler materials and/or silicone elastomers. Greases comprise three main types: I) grease comprising high viscosity silicone oil and filler material, II) grease comprising high viscosity silicone oil and silicone elastomer, and III) grease comprising high molecular weight silicone oil and filler material and silicone elastomer.
Abstract:
Adducts of clay, especially of the smectite variety, most especially bentonite, are prepared with an effective amount of at least one activated mixed metal oxide or oxy-hydroxide (AHMMO) formed by dehydrating hydrotalcite or a mixture comprising magnesium oxide and aluminum oxide, or a crystalline mixed metal hydroxide conforming substantially to the formula LimDdT(OH)(m+2d+3+n.a)(A )a.xH2O where m is zero to one, D is a divalent metal, d is from zero to 4, T is a trivalent metal, A represents at least one anion or negative-valence radical of valence n, where n is 1 or more, (m+2d+3+n.a) is equal to or greater than 3, (m+d) is greater than zero, and xH2O represents excess waters of hydration. These adducts are useful, e.g., in drilling muds and in viscosity modification of a wide variety of fluids.
Abstract:
A slurry composition for use as a lubricant and/or a stable suspension medium to suspend inert organic or inorganic particles which is an aqueous or polar solvent carrier containing gel particles as a lubricating and suspending agent for inert organic or inorganic particles. The composition can contain inorganic salts to provide additional electrostatic repulsion.
Abstract:
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.
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 [Ca₃(PO₄)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:
Disclosed are grease compositions containing a liquid fluorinated polymer and a thickening agent containing hexagonal lattice boron nitride powder having a bimodal particle size distribution as well as grease compositions containing a liquid fluorinated polymer and a thickening agent containing hexagonal lattice boron nitride powder and a solid fluorinated polymer.