Abstract:
A grease composition for use as a cable filling material which contains about 75 to 95 parts by weight of a base component of a polyol or ester having a molecular weight of at least about 3000 and about 2 to 20 parts by weight of colloidal particles such as silica. Optionally, an antioxidant component can be added to impart high temperature resistance or a rubber component can be added to improve bleed resistance. Also, an article of manufacture of a cable having a sheath with one of the grease compositions of the invention located therein, and a method for filling the cable with such grease compositions.
Abstract:
Thixotrope Zubereitungen in unterschiedlichsten Anwendungsbereichen enthalten Siliciumdioxid als verdickende oder thixotropierende Komponente, die flüssigen Systemen zugesetzt ist. In manchen Zubereitungen neigt die Kieselsäure zum Absetzen. In Zubereitunggen, welche selbst stärkere H-Brückenbildungen ausbilden, kann der Thixotropie gebende Effekt von SiO₂ wesentlich geschwächt werden. Die neuen thixotropen Zubereitungen sollen Hilfsmittel enthalten, die das Siliciumdioxid aktivieren bzw. dessen Wirkung verstärken. Die thixotropen Zubereitungen mit einem Gehalt an hochdispersem Siliciumdioxid enthalten als zusätzliche Komponente hydroxyfunktionelle Carbonsäureamide der Formel I
Verwendung der Verbindungen der Formel I zum Thixotropieren von flüssigen Zubereitungen und hochdisperses Siliciumdioxid, das mit Verbindungen der Formel I beschichtet ist.
Abstract:
Grease compositions including borated epoxides as friction-reducing additives. are thickened with a proportion of metal hydroxy-containing soap grease thickener. Such compositions have unexpectedly high dropping points.
Abstract:
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.
Abstract:
Organoclay compositions which comprise the reaction product of a smectite-type clay having an ion exchange capacity of at least 50 meq. wt. per 100 g. clay (active basis), and a branched chain quaternary ammonium compound are useful self-activating and self-dispersing additives to liquid organic systems such as grease and ink formulations. Also included are grease and ink formulations using these organoclay compositions.
Abstract:
Organosilicone pastes and greases including at least one oily diorganopolysiloxane polymer with a dynamic viscosity at 25 °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 νm and a high BET specific surface area of more than 5 m2/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 °C.
Abstract:
A tire gel balancing composition having a Storage modulus of between 3000 and 15000 Pa and the Specific Gravity less than 1000 kg/m3 in the temperature range between -20 DEG and +90 DEG C., preferably its Storage modulus is about 9000 Pa, is capable of balancing tires by being able to flow under the vibrations caused by imbalance in a wheel assembly. The composition preferably comprises a mixture of: 1) paraffinic oils, polybutene oils, polyol esters or polyol ethers; 2) hydrophobic or hydrophilic fumed silica; 3) poly-alkyl-methacrylates, styrene-ethylene-propylene block copolymers or polyhydroxycarboxyl acid derivatives; and optionally corrosion inhibitors and antioxidants.
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?n)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:
Produits d'addition à base d'argile, notamment du type smectite, et plus particulièrement de bentonite, préparés avec une quantité efficace d'au moins un oxyde ou oxy-hydroxyde métallique mélangé activé obtenu par déshydratation d'hydrotalcite ou d'un mélange contenant de l'oxyde de magnésium et de l'oxyde d'aluminium, ou d'un hydroxyde métallique mélangé cristallin correspondant pratiquement à la formule LimDdT(OH)(m+2d+3+na)(An)a.xH2O dans laquelle m va de zéro à un, D est un métal bivalent, d va de zéro à 4, T est un métal trivalent, A représente au moins un anion ou un radical à valence négative de la valence n, n représentant 1 ou plus, (m+2d+3+na) est égal ou supérieur à 3, (m+d) est supérieur à zéro et xH2O représente l'excédent d'eau dû à l'hydratation. Ces produits d'addition sont utiles, par exemple, pour le forage de boues et pour modifier la viscosité d'une large gamme de fluides.