Abstract:
Novel compositions useful as fluid gelling agents, especially for use in subterranean applications such as drilling fluids, are prepared by reacting an aqueous dispersion of a clay, such as bentonite, with an aqueous gel of a monodispersed mixed metal layered hydroxide of the formula Li.sub.m D.sub.d T(OH).sub.(m+2d+3+na) A.sub.J.sup.n where D is a divalent metal, such as Mg, T is a trivalent metal, such as Al, and A represents other monovalent or polyvalent anions, the formula being described in detail in the disclosure.
Abstract:
Lubricating greases suitable for use at high operating temperatures which contain a complex thickening system consisting of a lithium soap of a hydroxy fatty acid, an alkali salt of boric acid and a dilithium salt of a branched alkyl chain dicarboxylic acid.
Abstract:
Crystalline lithium stearate aluminate improves the coefficient of friction, the antiwear properties and the extreme pressure properties of lubricating fluids.
Abstract:
This invention relates to a process of preparing a high dropping point grease comprising a combination of a selected lithium soap of hydroxy fatty acid and a lithium salt of boric acid wherein said lithium salt of boric acid is formed in situ in the presence of an additive amount of selected water soluble polyhydroxy compound.
Abstract:
Asbestiform crystalline calcium M phosphate, where M is sodium or lithium, having a length to average diameter ratio of at least 5:1, can be prepared by forming a melt of a source of oxygen, calcium, phosphorus and M having a mole ratio of about 15 percent to about 30 percent M.sub.2 O, about 48 percent to about 60 percent P.sub.2 O.sub.5 and about 20 percent to about 37 percent CaO, cooling the melt within the range of about 500.degree. C. to about 750.degree. C. for a sufficient time to permit blocks of calcium M phosphate to form, and fiberizing the blocks into the asbestiform crystals. Such asbestiform crystalline calcium M phosphates are useful to prepare composites of organic polymeric materials.
Abstract:
An article including a first release liner with a first release surface, a second release liner with a second release surface, and a layer of a thermally conductive grease between the first and the second release surfaces. The thermally conductive grease includes a mixture of at least three distributions of thermally conductive particles, each of the at least three distributions of thermally conductive particles having an average (D) particle size which differs from the other distributions by at least a factor of 5.
Abstract:
An adhesive grease composition comprises a random copolymer of ethylene and an alpha-olefin having the following formula wherein R represents a lower alkyl group, x and y are, respectively, an integer provided that x/y=0.5 to 2.0 and x+y=50 to 150, and a thickening agent in defined amounts.
Abstract:
Disclosed are high performance grease compositions containing methylfluoroalkylsiloxanes and solid thickeners containing fluorinated polymers.
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:
A lubricating grease having a high dropping point, good stability against oxidation and long life contains a thickener comprising essentially the three components: lithium soap of C12-24 hydroxy fatty acid; lithium phosphate salt produced from phosphoric or phosphorous acid ester and dilithium borate. The amounts of hydroxy fatty acid and phosphoric or phosphorous acid ester are 3-100 parts by weight and 0.05-15 parts by weight per part by weight of boric acid respectively.