Abstract: A process is provided for the polymerization of an olefin such as ethylene in the vapor phase in a moving bed of particles of the polymerized olefin in which novel means are employed to feed the finely-divided solid polymerization catalyst to the polymerization zone. The process is carried out by pumping into the polymerization zone a Bingham fluid which has the finely-divided solid polymerization catalyst uniformly dispersed throughout a solid continuous phase, which is a mixture of a wax and a hydrocarbon which is a liquid at ambient temperature.

Abstract: A process is provided for the stereospecific polymerization of an olefin such as ethylene in a liquid medium in which a finely-divided solid polymerization catalyst is fed to the polymerization zone on a truly continuous basis to provide a uniform dispersion of the polymerization catalyst throughout the polymerization zone. The process is carried out by pumping into the polymerization zone a Bingham fluid which has the finely-divided solid polymerization catalyst uniformly dispersed throughout a solid continuous phase, which is a mixture of a wax and a liquid hydrocarbon.

Abstract: An improved process is provided for incorporating additives into thermoplastic polymers. The desired additive(s) are dispersed in a continuous solid phase which is a mixture of a wax and a normally liquid hydrocarbon to form a Bingham fluid composition. These Bingham fluid compositions, while solid at ambient temperature and pressure, will flow under an applied pressure and can be pumped to feed the additive to a molten polymer. When this mixture is passed through a mixing apparatus such as an extruder, the additive is uniformly dispersed throughout the polymer. The process is particularly well suited to incorporate additives into a molten ethylene polymer either as, or immediately after, the molten ethylene polymer is discharged from the reaction zone in which the polymer is prepared.

Abstract: A process is provided for the continuous high-pressure mass polymerization of ethylene in which novel means are employed to continuously introduce the free radical generating polymerization initiator into the polymerization zone. The process is carried out by pumping into the polymerization a Bingham fluid which has a free-radical generating polymerization initiator uniformly dispersed throughout a solid continuous phase, which is a mixture of a wax and a liquid hydrocarbon.

Abstract: A novel process is provided for the polymerization of ethylene in which the polymerization catalyst employed in the process is the reaction product of a vanadium ion-exchanged montmorillonite clay and an organometallic compound of a metal of Group II-A, II-B, or III-A of the Periodic Table.

Abstract: An improved process is provided for incorporating finely-divided inorganic additives such as diatomaceous earth into thermoplastic polymers. The desired additive(s) are dispersed in a normally liquid hydrocarbon to form a Bingham fluid composition. These Bingham fluid compositions, while solid at ambient temperature and pressure, will flow under an applied pressure and can be pumped to feed the additive to a molten polymer. When this mixture is passed through a mixing apparatus such as an extruder, the additive is uniformly dispersed throughout the polymer. The process is particularly well suited to incorporate such additives into a molten ethylene polymer either as, or immediately after, the molten ethylene polymer is discharged from the reaction zone in which the polymer is prepared.

Abstract: Bingham fluid compositions are provided which contain a functional material such as a polymerization initiator dispersed in a solid continuous phase, which is a mixture of a wax and a liquid hydrocarbon. Such compositions are prepared by heating the wax and the liquid hydrocarbon to form a melt and dispersing the functional material in the melt. Upon cooling, the composition solidifies with the functional material being uniformly dispersed throughout the continuous solid phase. The compositions, while solid at ambient temperature and pressure, assume the flow characteristics of a liquid under an applied pressure and can be pumped to feed the functional material to a polymerization reactor or molten polymer on a continuous basis.

Abstract: A vent plate for supporting a finger having a rivet portion is disposed intermediate adjacent core laminations in a dynamoelectric machine. A plurality of finger members secured to the vent plate cooperate with the core laminations to define a ventilation duct for circulation of a cooling gas through the core. The vent plate has a plurality of slot openings arranged to receive the rivet portions of each finger. The vent plate slots are characterized by a bow-tie outline defined by intersecting planar and curved side surfaces which permits variable orientation of rivet portions through a predetermined angular range.

Abstract: Compounded mineral oil compositions having improved pour point are obtained by the incorporation therein of a minor amount of an alpha-olefin copolymer of 1-hexene and 1-octadecene.

Abstract: The invention is directed to a pycnometer designed to measure the density of particulate porous polymer samples, particularly polymer samples having hydrocarbons and/or air absorbed in the pores thereof. The apparatus includes a sample cell of fixed volume fitted with a sample container of fixed weight, a gas reservoir of fixed volume, a valved line providing gas communication between the sample cell and the gas reservoir, a linear variable differential transducer to measure the weight of the polymer sample in the sample cell, a variable capacitance quartz crystal for measuring gas pressure in the gas reservoir, and a computer which calculates the density of the sample from the sample weight, and the volume of the sample determined by measurement of a super-atmospheric gas pressure in the gas reservoir when isolated from the sample cell and the equalized pressure established when the gas reservoir is placed in open communication with the sample cell.

Abstract: A vent plate for supporting a finger having a rivet portion is disposed intermediate adjacent core laminations in a dynamoelectric machine. A plurality of finger members secured to the vent plate cooperate with the core laminations to define a ventilation duct for circulation of a cooling gas through the core. The vent plate has a plurality of slot openings arranged to receive the rivet portions of each finger. The vent plate slots are characterized by a bow-tie outline defined by intersecting planar and curved side surfaces which permits variable orientation of rivet portions through a predetermined angular range.

Abstract: A process is disclosed for the preparation of a polymerization catalyst useful for the polymerization of ethylene. The catalyst consists of a chromium catalyst supported on a silica aerogel having a surface area of at least 300 square meters per gram and a pore volume of at least 2 milliliters per gram, said values being determined by isothermal liquid nitrogen desorption. The silica aerogel is prepared by a modification of the method disclosed by Kistler in U.S. Pat. No. 2,249,767.

Abstract: Novel catalysts are provided for the polymerization of olefins such as ethylene. The catalysts consist essentially of a chromium compound supported upon an inorganic carrier containing aluminum and arsenate moieties. The inorganic carrier is an amorphous precipitate of aluminum arsenate, or an amorphous coprecipitate containing aluminum and arsenate moieties in proportions such that the aluminum and arsenic are present in an atomic ratio in the range of 5:1 to 1:1. The catalysts are particularly useful for polymerizng ethylene in a Particle Form Process in that the catalysts have essentially no induction period and provide ethylene polymers having a desirably-broad molecular weight distribution and a desirably-high melt flow shear ratio.

Abstract: A process is disclosed for the preparation of a polymerization catalyst useful for the polymerization of ethylene. The catalyst consists of a chromium catalyst supported on a silica aerogel having a surface area of at least 300 square meters per gram and a pore volume of at least 2 milliliters per gram, said values being determined by isothermal liquid nitrogen desorption. The silica aerogel is prepared by a modification of the method disclosed by Kistler in U.S. Pat. No. 2,249,767.

Abstract: Compounded automatic transmission fluids having improved properties, including shear and viscosity properties, are obtained by the incorporation therein of alpha-olefin polymers of controlled molecular size and narrow molecular weight distribution. A shear stable, automatic transmission fluid having excellent high and low temperature viscosity properties and improved pour point is produced by adding the copolymer of 1-hexene and 1-octadecene to a lubricating oil.

Abstract: Novel metal oxide aerogels, particularly silica aerogels, having a combination of both a large surface area and a large pore volume are provided. Such aerogels have a surface area of at least 300 square meters per gram and a pore volume of at least 2 milliliters per gram, said values being determined by isothermal liquid nitrogen desorption. The aerogels are prepared by a modification of the method disclosed by Kistler in U.S. Pat. No. 2,249,767.

Abstract: A process for preparing a concentrate of a polyalpha-olefin in a hydrotreated lubricating oil base stock by conditioning the base stock in the presence of hydrogen and a Ziegler-Natta type catalyst and then polymerizing an alpha-olefin in the conditioned, hydrotreated lubricating oil base stock as the reaction medium. The resulting concentrate of the polyalpha-olefin dissolved in the hydrotreated lubricating oil base stock is useful as an additive in preparing multiviscosity graded motor oils.

Abstract: A novel composition of an internal olefin or mixture of internal olefins having the formula R--(CH.sub.2).sub.2 --C(R)=CH--C(R) (CH.sub.3)--(CH.sub.2).sub.2 --R, where each R group is an alkyl group having from four to 12 carbon atoms and a minor amount of a lubricating oil anti-oxidant. A composition of 11,13-dioctyl-13-methyl-11-tricosene and two percent 2,6-di-t-butyl-p-cresol is useful as a high temperature lubricant.

Abstract: A polymerization reaction product comprising a solution of a poly(1-alkene) and a hydrocarbon polymerization solvent is purified of Ziegler-Natta aluminum and titanium containing catalyst residue by treating with flux-calcined diatomite to deactivate and insolubilize the aluminum and titanium and filtering out the insolubilized aluminum and titanium.