Abstract: Extrudable white-filled polyolefin compositions which exhibit reduced die drool are provided. More particularly, the compositions are white or opaque compositions comprising a polyolefin, whitening or opacifying inorganic filler and a mercaptobenzimidazole compound.

Abstract: Microfine powder adhesive blends are provided. The powders are comprised of a polyolefin base resin component and acid or acid derivative functionalized polyolefin component with one or more optional components. The microfine powders are produced from melt blended adhesive products using a dispersion process and have median particle sizes from 5 to 250 micrometers.

Abstract: Linear low density polyethylene compositions suitable for the production of films having improved breathability are provided. The compositions which are comprised of a linear low density polyethylene base resin, a functionalized polyolefin and a polyester polyol are melt blended under conditions of mixing and shear to increase their melt elasticity.

Abstract: Ethylene polymer composites, concentrates and a process utilized for their preparation are provided. The composites of the invention have increased melt strength compared to the base resin and other improved physical characteristics. The composites contain an organically modified clay and may also contain a compatibilizng agent, depending on the base resin used.

Abstract: Improved multi-phase polypropylene composites are provided. The compositions are comprised of a polypropylene base resin, a non-compatible dispersed phase which can be a polymer or filler material and a propylene-ethylene copolymer grafted with a carboxylic acid or carboxylic acid derivative.

Abstract: Adhesive blend compositions having significantly improved adhesion to metals at elevated temperatures are provided. The compositions are blends of one or more polyolefin base resins, an acid or acid derivative modified polyolefin and silane modified polyolefin. A low level of adhesion promotor is optionally included in the blend.

Abstract: Adhesive compositions which exhibit significantly improved adhesion to metals and polyolefins are provided. The compositions are blends of one or more polyolefin base resins and graft-modified polyolefin to which a low level of adhesion promoter is added.

Abstract: A process for preparing premixed supported boraaryl catalysts having improved shelf life is provided. The process comprises supporting an organometallic compound comprising a group 3-10 transition metal or lanthanide metal and at least one boraaryl ligand an inorganic support which has been chemically and thermally dehydroxylated to remove all hydroxyl from the surface of the support; contacting with an organoaluminum compound utilizing an incipient wetness procedure wherein 90 to 150 percent of the catalyst pore volume is filled with a hydrocarbon solution containing the organoaluminum and provide a molar ratio of aluminum to transition/lanthanide metal of 0.5:1 to 50:1; and recovering the premixed catalyst powder.

Abstract: High melt flow filled propylene polymer compositions suitable for injection molding are provided. The compositions are blends of propylene impact copolymer, high melt index plastomer and mineral filler.

Abstract: An improved process for producing bonded activated carbon structures utilizing microwave radiation is provided. The structures are produced by exposing a particulate mixture comprised of activated carbon particles and polyolefin resin binder particles in a microwave transparent mold to increase the temperature of the activated carbon particles 3 to 30° C. above the crystalline melting point of the polyolefin resin binder and thereafter compressing the mixture to increase contact between the particles and lowering the temperature of the particulate mixture below the melting point of the polyolefin while maintaining point bond formation conditions. The bonded structures may be separated from the container and used as such or the bonded structure and container in which it is formed may be retained and used as a unit.

Abstract: Improved grafted propylene copolymer compositions and adhesive blends containing same are provided. The grafts are obtained by reacting propylene-ethylene impact copolymers having specified rubber contents and molecular weight distributions with ethylenically unsaturated acids or acid derivatives, such as maleic anhydride.

Abstract: Improved fuel additives and distillate fuels containing said additives are described. The additives impart improved low temperature flow and filterability and also impart stability to distillate fuels, particularly hard-to-treat distillate fuels. The additives are a combination of an olefin/vinyl carboxylate polymer and two specific polyimides having different alkyl substituents.

Abstract: A process for producing olefin polymer composites having improved melt strength and other improved physical characteristics is provided. The process is a solution process wherein an organically modified clay is intimately incorporated, at low levels and without the use of compatibilizing agents, into an olefin polymer base resin.

Abstract: A process is provided for producing ethylene (co)polymer nanocomposites in a high pressure polymerization reactor. The process by which nanocomposites having organically modified clays incorporated and intimately dispersed therein involves polymerizing ethylene and one or more optional comonomers under high pressure polymerization conditions in the presence of an organic peroxide initiator and organically modified clay.

Abstract: Propylene polymer composites containing modified clays and compatibilizing agents, more specifically hydrogenated tallow modified montmorillonite and maleic anhydride grafted propylene polymers, are provided. Concentrates or masterbatches used to prepare the composites are also described. The improved composites of the invention exhibit increased melt strength compared to the base resin and to composites similarly formulated using other types of modified clays. Moreover, the improved results are achievable at lower compatibilizer levels and lower ratios of compatibilizer to clay than has heretofore been considered practical.

Abstract: An apparatus and method for continuously removing polymer from a pressurized loop olefin polymerization reactor containing a slurry of polymer particles and fluids. The slurry is continuously discharged from polymer-rich zones of the reactor and enters one or a series of non-cyclonic flash vessels, in which the particles separate from the fluid. The flash vessel has a conical bottom in which a minimum level of polymer is maintained for a dynamic seal between the inlet and outlet.

Abstract: Disperse dyed polyethylene fibers obtained by either melt spinning or flash spinning and materials produced from said fibers are provided. The process utilizes dye blends containing at least three and, more preferably, four or more disperse dyes selected from a primary color group. The individual dyes are utilized at a concentration of at lest 75% but less than 100% of the determined maximum concentration which produces crocking. HDPE and LLDPE materials are effectively dyed using disperse dye blends formulated by the invention.

Abstract: Improved stabilizer compositions which impart superior oxidative stability to polyolefins used for wire and cable insulation are provided. The stabilizer compositions are a mixture of a diacyl hydrazine compound and an alkylenebisacylamide compound. The stabilizer combinations are particularly useful for propylene polymer insulation compositions used in filled cable constructions. Polyolefin compositions stabilized with the stabilizer combinations of the invention and jacketed constructions utilizing same are also disclosed.

Abstract: Semi-conductive compositions useful for extrusion coating wire and cable are provided. The semi-conductive extrusion coating compositions of the invention utilize a base resin containing linear low density polyethylene and a combination of a higher structure conductive carbon black and a lower structure conductive carbon black. The linear low density polyethylene may be combined with other polyolefin resins, such as low density polyethylene. The resulting semi-conductive compositions have a useful balance of processability and thermomechanical stability and physical/mechanical properties making make them particularly well-suited for use as conductive layers for power cable constructions.

Abstract: Polyolefin fibers, primarily polypropylene fibers, having improved properties are provided. The ability to produce fibers having an improved balance of properties including increased tenacity, modulus and elongation, is accomplished by incorporating from 1 to 10 weight percent aromatic hydrocarbon resin in the polypropylene fiber-forming composition which can be based on a propylene homopolymer or copolymer or blend of these propylene polymer resins with a non-propylene-containing resin.