Abstract: Specific thermoplastic compositions which are formulated to be exceptionally useful for adhesion to copper-containing metals are prepared from either glycidyl acrylate grafts of polypropylene based formulations with a minor elastomeric component or low density polyethylene based formulations grafted with acrylic acid and/or glycidyl acrylate and containing a minor elastomeric component.

Abstract: Particle size is increased and particle size range can be decreased, i.e., narrower particle size distribution can be obtained for Ziegler transition metal halide catalysts by working the catalysts with very small quantities of a fibrillatable polytetrafluoroethylene (PTFE) powder in order to trap, i.e., entangle the catalyst in a web of PTFE submicroscopic fibers.

Abstract: Large particle size polyolefin is obtained by polymerizing mono-olefins in the presence of a supported olefin catalyst which has been ball milled in the presence of small quantities of polytetrafluoroethylene (PTFE) powder in order to trap, i.e., entangle, the supported catalyst in a web of PTFE submicroscopic fibers.

Abstract: Highly useful novel microcellular polymeric structures, especially films and fibers, are prepared from certain solid polymers. Aromatic polysulfones, polyimides, polyhydantoins, polyamides and polyparabanic acid are the preferred ones for the novel structures of the invention.

Abstract: Highly useful novel microcellular polymeric structures, especially films and fibers, are prepared from certain solid polymers. Aromatic polysulfones, polyimides, polyhydantoins, polyamides and polyparabanic acid are the preferred ones for the novel structures of the invention.

Abstract: Specific thermoplastic compositions which are formulated to be exceptionally useful for adhesion to copper-containing metals are prepared from either glycidyl acrylate grafts of polypropylene based formulations with a minor elastomeric component or low density polyethylene based formulations grafted with acrylic acid and/or glycidyl acrylate and containing a minor elastomeric component.

Abstract: This invention relates to processes and techniques for forming metal and/or plastic/polyparabanic acid (PPA) laminates particularly for use as a component of electrical and electronic systems, especially as flexible circuit materials. Laminate species not requiring intermediate adhesive layers, not fabricated from preformed PPA films and not requiring subsequent cross-linking or other curing reactions are preferred. Solvent casting of PPA is a preferred method of preparing such laminates.

Abstract: A fusable powder composition comprising a cross-linkable organic polymeric material of less than 75 micron size, an organic peroxide, and preferably for some polymers an organosilicon compound for forming polymeric coatings on substrates such as glass or metal.

Abstract: The fouling of autorefrigeration polymerization systems because of entrained particles in the vaporized solvent-diluent is substantially reduced by returning the recycle solvent-diluent into the reaction zone through nozzles which provide a solvent-diluent spray of an average droplet size of less than 1000 microns, preferably between about 225 and 300 micron average particle size, which spray removes major amounts of entrained particles down to 5 microns in size. The solvent diluent may be an inert material or unreacted alpha-olefin, such as propylene.

Abstract: Novel TiCl.sub.3 catalytic complexes for the stereospecific polymerization of alpha-olefins and to a process for preparation of these catalytic complexes which are obtained by reduction of TiCl.sub.4 in the presence of a Lewis base which has preferably been complexed with the reducing agent. Furthermore, the present invention relates to a process for improved polymerization of alpha-olefins to crystalline polyolefins in high yields and high stereospecificity using these catalytic complexes.

Abstract: Polypropylene is neutralized and deashed by contacting a slurry of the particulate polymer with an alcohol solution of from 1 to 5 milliequivalents of an alkali base, preferably Na or K, excess beyond that needed to neutralize said polymer.

Abstract: Polyethylene is produced by polymerization of ethylene alone or with comonomers or telogens (modifiers) in an elongated tubular reactor having an inlet and outlet and at least one reaction zone and one cooling zone in the presence of free radical or free oxygen yielding initiator at elevated temperatures and pressures by passing the reaction mixture through each of the reaction zones of the tubular reactor having internal diameters between about 0.5 and 3 inches at bulk fluid velocities sufficient so that the Flow Number in each reaction zone is greater than 3.3 ft..sup.2 /sec. Flow Number is defined as the bulk fluid velocity in ft./sec. times diameter in feet. With Flow Numbers in excess of 3.3 ft..sup.2 /sec. in the reaction zones, it has been found that the effective reaction volume in the reaction zone has been increased and, accordingly, a more efficient process for producing a high quality polyethylene.

Abstract: This invention relates to processes and techniques for forming metal and/or plastic/polyparabanic acid (PPA) laminates particularly for use as a component of electrical and electronic systems, especially as flexible circuit materials. Laminate species not requiring intermediate adhesive layers, not fabricated from preformed PPA films and not requiring subsequent cross-linking or other curing reactions are preferred. Solvent casting of PPA is a preferred method of preparing such laminates.

Abstract: A multi-phase heated fluid process which avoids heated fluid breakthrough, is used to continually produce subsurface hydrocarbons, utilizing two commmunicating wells in a process comprising:Simultaneous injection of said heated fluid into said wells until substantial mobilization of hydrocarbons within a zone surrounding said wells is obtained; one well is shut in while production is commenced in the other well;Preferably a final phase where sufficient heated fluid at relatively restricted rates is continually injected into said one well to provide driving force for continual production in said other well, without interruption, once production has commenced.

Abstract: Plastic compositions containing polyolefins and substituted nitrogen heterocyclic compounds having the formula: ##STR1## wherein X is nitrogen or CH, and R.sub.1, R.sub.2, R.sub.3 and R.sub.4 are from the group hydrogen; a straight or branched chain alkyl group having from 1 to 6 carbon atoms; cyano; nitro; lower alkoxy; fluorine, dialkylamino, phenyl, halo-phenyl, benzyl and halo-benzyl, have been found to be photodegradable plastic materials for use, for example, as wrapping films and agricultural mulching films.

Abstract: The corrosion of ferrous metals by corrosive acids at elevated temperatures is inhibited by adding to environments containing the acids an effective amount of a novel .alpha., .OMEGA. (hereinafter "alpha", "omega", respectively) diacetylenic diol (e.g., with two acetylenic functionalities) having the structural formula: ##STR1## where R is an aliphatic, alicyclic or aromatic residue containing from 1 to about 12 carbon atoms and may include one or more functional groups such as halogen atoms, carbonyl, carboxyl, carbamyl, amino, formyl or nitroso radicals or other functional groups without impaired performance. The diacetylenic diols may be employed in combination with other corrosion inhibitors.

Abstract: Melt blown non-woven mats prepared from thermoplastic polymer fibers and substantially completely free of polymer shot are produced at high polymer throughput rates in an improved melt blowing process in which thermoplastic polymer resins, preferably polypropylene, having initial intrinsic viscosities of at least 1.4, are degraded, optionally in the presence of a free radical source compound, to have both reduced intrinsic viscosities and an apparent viscosity in the melt-blowing nozzle orifices of from about 50 to about 300 poise.