Abstract:
Disclosed are grease compositions containing a liquid fluorinated polymer and a thickening agent containing hexagonal lattice boron nitride powder having a bimodal particle size distribution as well as grease compositions containing a liquid fluorinated polymer and a thickening agent containing hexagonal lattice boron nitride powder and a solid fluorinated polymer.
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 lubricating grease composition includes a grease containing a base oil and a thickening agent consisting of a mixture of tricalcium phosphate represented by the formula Ca3(PO4)2 and a urea compound and, incorporated as additives in the grease, (A) a sulfurized molybdenum dialkyldithiocarbamate represented by the formula wherein R and R 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
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 composition includes a grease containing a base oil and a thickening agent consisting of a mixture of tricalcium phosphate represented by the formula
Ca₃(PO₄)₂
and a urea compound and, incorporated as additives in the grease, (A) a sulfurized molybdenum dialkyldithiocarbamate represented by the formula
wherein R¹ and R² 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
Abstract translation:润滑脂组合物包括含有基础油的润滑脂和由式Ca 3(PO 4)2表示的磷酸三钙的混合物和脲化合物组成的增稠剂,作为润滑脂中的添加剂,(A)硫化钼 由式表示的二烷基二硫代氨基甲酸酯,其中R 1和R 2各自独立地表示选自具有1至24个碳原子的烷基的基团; m为0或1〜3的整数; n为1〜4的整数, m + n = 4,(B)式所示的磷酸三苯酯
Abstract:
Disclosed are high performance grease compositions containing methylfluoroalkylsiloxanes and solid thickeners containing fluorinated polymers.
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.
Abstract:
Crystalline aluminates of the formula: I. (LiA x ) y ·2Al(OH)₃·nH₂O wherein A is one or more anions and/or negative-valence radicals or mixtures thereof; wherein, in formula I, x is a quantity of A ions or radicals sufficient to substantially satisfy the valence requirements of Li; wherein n is zero or the number of waters of hydration; wherein y is a numerical value at least sufficient to maintain the crystalline structure; are found to improve the properties of organic materials when incorporated therein.
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 C 12-24 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.
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, usually at about 1000to 1200°C., cooling the melt to within the range about 550°C. to about 970°c., inducing acicular crystal formation, and recovering the acicular crystals. The diameters of the resultant acicular, crystalline calcium metaphosphates can vary from an average of 0.5 micron or smaller up to several microns. Cryst- afs having a length of several centimeters can be prepared. Such acicular, crystalline calcium metaphosphates are useful in a number of applications, and particularly to prepare composites with organic polymeric materials.