Abstract: Laminated glass structures are prepared by bonding together at least two glass sheets with an ethylene polymer containing substituent carboxylic groups and, optionally, amide and/or ester groups.

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: Centrifugal spinning apparatus is provided for the manufacture of fibrils from hot viscous hydrocarbon solutions of olefin polymers having an intrinsic viscosity of at least 3.5. The apparatus consists of an impeller which rotates at high speed in a cylindrical cavity having a discharge port. The impeller has a plurality of blades whose narrow dimensions lie substantially in the plane of the impeller's rotation and whose tips come in close proximity to the inner peripheral surface of the cylindrical cavity. The blades are arranged in at least two substantially-identical sets. Within each set, the blades are offset substantially equidistant from one another, both in the rotational plane of the impeller and in the plane transverse thereto. Two inlet ports are provided in the peripheral surface of the cylindrical cavity to feed liquids to the cylindrical cavity, each of which port is narrow in a plane transverse to the plane of the impeller's rotation and extends over substantially the entire peripheral surface.

Abstract: A process is disclosed for removing phenols from dilute aqueous solutions thereof. The method consists of contacting the aqueous phenol solution with a mass of olefin polymer fibrils which absorb the phenol from the aqueous solution. Water treated by the method does not give a characteristic phenol color when tested with ferric chloride.

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: A process for preparing olefin polymer fibrils is disclosed. A high molecular weight ethylene polymer is dissolved in methylene chloride in a first zone that is heated to develop a superatmospheric pressure. The polymer solution is fed to a second zone which is maintained at atmospheric pressure. The polymer solution is discharged into vigorously stirred isopropanol to form fibrils. Polymer solvent is distilled from the resulting slurry. The fibrils are refined in the isopropanol slurry. The polymer solvent and the isopropanol are recycled to the process.

Abstract: In the extruding, cooling, pelletizing, drying, and storing of ethylene polymers prepared by a high pressure continuous mass process, air coming in contact with the polymer and the cooling water is diluted with low concentrations of ethylene gas. This dilute air-ethylene mixture is drawn into an air stream fed to a flare stack gas burner as a component of the oxidizing gas to avoid release of the ethylene to the atmosphere.

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: Crystalline polymers of butene-1 are plasticized with specific liquid hydrocarbons. The plasticizer is prepared by dimerizing an alpha olefin containing 8-12 carbon atoms and then hydrogenating the dimer.

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: 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: 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 process is disclosed for treating high molecular weight olefin polymer fibrils in the presence of an aqueous solution of polyvinyl alcohol while subjecting the solution to ultrasonic vibrations.

Abstract: Apparatus is provided for the chromatographic analysis of a plurality of samples having volatile components present in a nonvolatile matrix. The apparatus includes as its principal elements:(a) an oven,(b) A sample cylinder mounted in the oven, which cylinder includes an entry port external of the oven for admitting and withdrawing sample boats from the cylinder,(c) A chromatographic analysis column mounted in the oven,(d) A detector element for analyzing the outlet gas of the analysis column,(e) Two chromatographic trap columns external of the oven,(f) A first gas line for feeding a first carrier gas through the sample cylinder and one of the trap columns,(g) A second gas line mounted in the oven for feeding a second inert carrier gas through one of the trap columns and the analysis column, and(h) A valve assembly having two fixed operating positions which feed the two carrier gases in reversed flow through different trap columns when changed from one operating position to the other.

Abstract: The applicants have provided novel heat curable resin compositions consisting predominately of a chemical compound having the structure of Formula A shown in FIG. 1 of the drawings. A desirable characteristic of the novel resin compositions of the invention is that they have a high solubility in selected solvents such as N-methyl-2-pyrrolidone (NMP) so that resin solutions containing at least 30 weight % resin solids at ambient temperature can be prepared. Glass fabric laminates having a high loading of resin are easily prepared from such solutions. Typically, high solids solutions of the compounds of Formula A are prepared by a three-step process. A solution containing at least 17 weight % of 3,3',4,4'-benzophenonetetracarboxylic acid dianhydride (BTDA) in N-methyl-2-pyrrolidone (NMP) is prepared by heating the BTDA and NMP to a temperature of at least 150.degree. C with stirring. The solution then is cooled to a temperature of about 60.degree. C and substantially 0.

Abstract: Novel polymer compositions which can be extruded to prepare films of good quality are obtained when 20 to 150 parts by weight of a petroleum wax are blended with 100 parts by weight of an ethylene polymer having an annealed density of at least 0.95 and an intrinsic viscosity of at least about 3.0.

Abstract: Centrifugal spinning apparatus is provided for the manufacture of fibrils from hot viscous hydrocarbon solutions of olefin polymers having an intrinsic viscosity of at least 3.5. The apparatus consists of an impeller which rotates at high speed in a cylindrical cavity having a discharge port. The impeller has a plurality of blades whose narrow dimensions lie substantially in the plane of the impeller's rotation and whose tips come in close proximity to the inner peripheral surface of the cylindrical cavity. The blades are arranged in at least two substantially-identical sets. Within each set, the blades are offset substantially equidistant from one another, both in the rotational plane of the impeller and in the plane transverse thereto. Two inlet ports are provided in the peripheral surface of the cylindrical cavity to feed liquids to the cylindrical cavity, each of which port is narrow in a plane transverse to the plane of the impeller's rotation and extends over substantially the entire peripheral surface.

Abstract: Apparatus is provided to feed controlled quantities of a catalyst slurry to an olefin polymerization reactor in a controlled time sequence. The apparatus includes a feed line for continuously feeding an inert hydrocarbon liquid such as hexane or isobutane to the reactor. A bypass loop is provided in the feed line and is equipped with auxiliary apparatus to charge the loop with a predetermined quantity of catalyst slurry. At preselected timed intervals, the hydrocarbon feed is fed through the bypass loop to sweep the charge of catalyst slurry to the polymerization reactor.

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.