Abstract:
A new thread compound for tubing, casing and sucker rods which is composed of: mineral oil (freezing point in the range from -10.degree. to -14.degree. C.), polyisobutene solution (Staudinger index J.sub..degree. 46 to 52) in mineral oil, anticorrosive additive based on organic compounds, which do not contain heavy metals and chlorinated hydrocarbons, and which is dissolved in mineral oil, modified alumino-silicate as trialkylaryl ammonium smectite, propylene carbonate density/20.degree. C. 1.189, aluminium stearate (ash from 9.5 to 11.5 wgt. parts), graphite (quality as required in API 5A3), copper flake (quality as required in API 5A3), lead powder (quality as required in API 5A3) and zinc dust (quality as required in API 5A3), and a process for its manufacture are provided.The thread compound is characterized by high resistance to temperature, pressure, extreme friction and wear.
Abstract:
Gas contaminants generated from the grease of bearings operating in a magnetic disk device adhere to the magnetic head and causing stiction and magnetic head crash. Such bearings are typically spindle bearings and pivot bearings. In operation, heat is generated that causes the bearing grease to generate the gases. By heat treating the grease, slow evaporating substances of hydrocarbon compounds with carbons of C9 to C13 in the grease are reduced to not more than 0.001 wt. % of the grease. The grease can then be used to lubricate the bearings. The heat treatment is performed at a temperature of 60.degree. to 100.degree. C. at a pressure of 10.sup.-3 to 10.sup.-8 torr. The assembled, lubricated bearings can be heat treated separately from the magnetic disk device or the heat treatment can take place after the bearings have been assembled in the magnetic disk device.
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:
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:
Nitrogen- and oxygen-containing compositions prepared by reacting, in the presence of an acid catalyst,(A) at least one aliphatic hydroxy compound of the formulaR.sup.1 (OH).sub.xwherein R.sup.1 is an aliphatic hydrocarbon-based radical and x is an integer which is at least 1, with(B) at least one (tertiary amino) alkanol useful as lubricant and fuel additives. Also disclosed are concentrates of these compositions and lubricants and fuels containing these compositions.
Abstract:
Grease compositions, wherein the grease is thickened with a metal hydroxy-containing soap grease thickener are provided. Other essential ingredients of the compositions include borated hydrocarbyl epoxides and phosphorus and sulfur moieties.
Abstract:
Nitrogen- and oxygen-containing compositions prepared by reacting, in the presence of an acid catalyst,(A) at least one aliphatic hydroxy compound of the formulaR.sup.1 (OH).sub.xwherein R.sup.1 is an aliphatic hydrocarbon-based radical and x is an integer which is at least 1, with(B) at least one (tertiary amino) alkanol useful as lubricant and fuel additives. Also disclosed are concentrates of these compositions and lubricants and fuels containing these compositions.
Abstract:
A method of protecting silver contacts in switches for electronic equipment is provided by utilizing a silicone-based grease which is comprised of a polyorganosiloxane base in combination with a thickener such as finely divided silica or a metal soap and an organomercaptan compound represented by R.sup.2 SH wherein R.sup.2 represents a saturated or unsaturated aliphatic hydrocarbon group having 18 to 22 carbon atoms. There may also be optionally included an ester bond-containing organic compound for improved properties when the treated silver contacts have relatively high contact pressure.
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.