Abstract:
A grease-like silicone composition comprising at least a liquid organopolysiloxane comprising siloxane units represented by the formula R2SiO2/2, siloxane units represented by the formula RSiO3/2, and siloxane units represented by the formula R3SiO1/2 and a thickening agent. A grease-like silicone composition is provided that is capable of containing a large amount of thickening agent and possesses superior heat resistance.
Abstract:
A lubricating grease composition includes a grease containing a base oil and a thickening agent consisting of a mixture of tricalcium phosphate represented by the formulaCa.sub.3 (PO.sub.4).sub.2and a urea compound and, incorporated as additives in the grease, (A) a sulfurized molybdenum dialkyldithiocarbamate represented by the formula ##STR1## wherein R.sup.1 and R.sup.2 each independently represents a group selected from the group consisting of alkyl groups having from 1 to 24 carbon atoms; m is 0 or an integer of from 1 to 3; and n is an integer of from 1 to 4; provided that m+n=4, and (B) triphenyl phosphorothionate represented by the formula ##STR2##
Abstract:
A silicone composition containing: (A) 100 parts by weight of organopolysiloxane; 0.1 to 50 parts by weight of thickening agent (C) 0.01 to 20 parts by weight of fluorine-containing surfactant; and (D) 0.1 to 20 parts by weight of volatile water-soluble solvent.
Abstract:
Coating formulations which behave as elastic solids having reversible stress-induced fluidity are prepared by creating a fluid having distributed therein effective amounts of ionic charge sites and countercharge sites. For instance, elastic solids having reversible stress-induced fluidity are prepared by combining liquid formulations with a dispersion of a small, but effective, amount of at least one crystalline mixed metal hydroxide conforming substantially to the formulaLi.sub.m D.sub.d T(OH).sub.(m+2d+3+n.multidot.a) (A.sup.n).sub.a .multidot.xH.sub.2 Owhere 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 and a is the amount of A, where n is 1 or more, (m+2d+3+n.multidot.a) is equal to or greater than 3, (m+d) is greater than zero, and xH.sub.2 O represents excess waters of hydration, if any. The coating formulations include, for example, paints, resin coatings, adhesives, de-icers, curable coatings, dryable coatings, and hardenable coatings.
Abstract:
Silicone grease compositions are prepared by blending a thickening agent with a liquified crosslinked organosiloxane gel produced using a platinum-catalyzed hydrosilylation reaction. The gel is liquified by application of a shearing force to the crosslinked gel. The shearing force can be applied prior to and/or during blending of the gel with the thickener.
Abstract:
Formulations or products are caused to be active antimicrobials by the addition thereto of at least one effective amount of at least one crystalline mixed metal hydroxide (MMOH) conforming substantially to the formulaLi.sub.m D.sub.d T(OH) (m+2d+3+na) (A.sup.n).sub.a.xH.sub.2 Owhere 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, (m+2d+3+na) is equal or to greater than 3, (m+d) is greater than zero, and xH.sub.2 O represents excess waters of hydration. The MMOH forms an adduct with, an coats, the microbes, thereby deactivating the microbes.
Abstract:
Disclosed is complex tolylene polyurea-thickened grease containing less than 7 parts per million 2,4-diaminotoluene and a process for making said grease comprising reacting an isocyanate, a polyamine and monoamine with a major portion of a lubricating oil and thereafter adding an alkaline earth metal oxide or hydroxide and a carboxylic acid anhydride containing 2 to 20 carbon atoms to said mixture and thereafter milling said mixture to the consistency of grease.
Abstract:
Acicular, crystalline calcium metaphosphate having a length to average diameter ratio of at least 10:1 can be prepared by forming a melt of materials used as a source of calcium, phosphorus and alkali metal, cooling the melt to about 550.degree. C. to about 970.degree. C., inducing acicular crystal formation, and recovering the acicular crystals. The diameters of the resultant acicular, crystalline calcium metaphosphates can average as small as 0.5 micron or smaller. Acicular, crystalline calcium metaphosphate can also be prepared with an average diameter of several microns and a length of several centimeters. Such acicular, crystalline calcium metaphosphates are useful in a number of applications, and particularly to prepare composites with organic polymeric materials.
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:
Damit die Schraubenverbindungen nach langfristigem Einsatz in der Zerspanung unter extremen Einsatzbedingungen mit Schmutz, extremer Wärme, Feuchtigkeit, Oxidation und Wechsellasten problemlos und ohne überproportionalen Kraftaufwand wieder gelöst werden können, wird vorgeschlagen, dass die Schrauben (2) zumindest im Bereich ihres Gewindes (3) durch Beschichtung eine glatte Oberfläche aufweisen, in der Beschichtung PTFE Partikel, bevorzugt mit einer Partikelgröße zwischen 100 nm und 300 nm, enthalten sind und die Schraubenverbindung (1) bzw. die beiden Gewindepartner (Schrauben und Gewindebohrungen) mit geringen Mengen eines hitzebeständigen Fettes mit Keramikpulverpartikeln geschmiert sind.