Abstract:
Improvement in greased (I) effected by addition of at least one powdered polymer (II), selected from polyethylene (density > 0.94), polypropylene (density =0.89-092) and their copolymers, where (II) is dispersed in (I) at temperatures less than 225 deg.F. Amount of (II) used is 0.1-10% wt. (pref. 0.5-5%) based on total weight of grease. Any grade of flowable (I) may be used and preferred (I) are those in USP 3,169,114 and 3,112,270. (II) should have average particle diam. of less than 300 (pref. 100) microns. (II) incorporated into (I) in conventional blending maching. Grease properties improved by addition of (II) without causing a further thickening of (I).
Abstract:
In an electrical cable having at least one polyolefin sheath layer and an aluminum sheath layer, the polyolefin layer is bonded to the aluminum layer with an adhesive material of 50 to 90 weight percent amorphous polypropylene and 50 to 10 weight percent mineral lubricating oil.
Abstract:
Metals are quench hardened by being heated above the critical temperature and then immersed in a quenching medium containing a calcium petroleum sulfonate having a base number less than 15 and prepared by sulfonating one part by weight of a propanefractionated, solvent-extracted, dewaxed intermediate base bright stock having a viscosity of about 200 to 230 SUS at 210* F. and a viscosity index of at least about 85 with a quantity of sulfonating agent consisting essentially of liquid SO3 dissolved in an inorganic solvent equivalent to from about 0.1 to about 1 part by weight of 20 percent fuming sulfuric acid, at a temperature in the range of about 50* to 200* F.; neutralizing the resulting reaction mixture with at least the minimum required for neutralization of an aqueous slurry of calcium hydroxide; heating the resulting mixture in the liquid phase at a temperature of about 360* to 400* F. for about 10 minutes; and removing water and inorganic solids therefrom to obtain calcium petroleum sulfonate product containing not more than 6 weight percent sulfated ash. This calcium petroleum sulfonate product can be used directly to supply the calcium petroleum sulfonate or the calcium petroleum sulfonate can be extracted from this product and utilized in a more purified form.