Abstract:
A grease composition for a constant velocity joint involves a base oil containing a thickener and boron nitride powders and optionally an organozinc compound.
Abstract:
A grease composition for a constant velocity joint contains a base oil containing 2 to 25 wt.% of a thickener based on total weight of the composition, 0.5 to 20 wt.% of boron nitride powders based on total weight of the composition, and 0.1 to 10 wt.% of an extreme pressure agent based on total weight of the composition selected from the group consisting of molybdenum dithiocarbamate, a sulfur and phosphorus-containing extreme pressure agent, and mixtures thereof. The sulfur and phosphorus-containing extreme pressure agent consists of a sulfur-containing compound and a phosphorus-containing compound. The sulfur-containing compound is selected from the group consisting of a sulfide of fats and oils, a polysulfide, and mixtures thereof. The phosphorus-containing compound is selected from the group consisting of a phosphate, a phosphite, and mixtures thereof.
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:
Encapsulating particles of solid thiocarbonate salts, esters and complexes with air- and water-impermiable coatings produces compositions having long-term stability.
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:
A radiation-resistant grease employed in various machines at nuclear facilities, based on (A) an oil principally composed of a phenoxyphenoxydiphenyl and a mono- and/or dialkyldiphenyl ether and (B) a bentonite based thickening agent, if necessary, together with (C) a gelling aid of alcohol, ketone, or carbonate ester.
Abstract:
An extreme pressure grease composition capable of limiting temperature increase comprising a poly(alpha-olefin) as a base fluid and a tetralkyl ammonium smectite clay as a thickener. Antimony dialkyldithiocarbamate and molybdenum disulfide may be added to the grease composition as an extreme pressure inhibitor.
Abstract:
Novel higher dialkyl dimethyl ammonium clays, of superior gellant effectiveness in oxygenated organic liquids, can be produced by the overtreatment of layer and chain type mineral clays via ion exchange reactions. For example, a layered dioctadecyl dimethyl ammonium montmorillonite, a superior gellant for alkyd resin based coatings, is prepared by the reaction of sodium montmorillonite with a 12 to 25% excess of the corresponding quaternary chloride beyond the known ion exchange capacity of the clay. The overtreatment is preferably carried out in a mixture of water and organic solvent which disperses the clay and dissolves the quaternary ammonium salt.
Abstract:
The present invention relates to lubricating grease compositions comprising (a) at least one high-viscosity fluorinated oil having a viscosity of 500 to 1500 mm2/s, (b) boron nitride and (c) a binder selected from bentonite, alkali metal phosphates, aluminum phosphates, alkali metal silicates, alkaline earth metal silicates, aluminum silicates, alkaline earth metal carbonates, calcium borate, silicon dioxide, titanium dioxide, aluminum oxide and mixtures thereof. The lubricating grease compositions find use especially in the high-temperature sector, for example for the lubrication of oven pullout rails.