Abstract: A homogeneous composite is provided comprising (a) about 0.5 to 90% by weight of an ultrahigh molecular weight linear polyethylene having a molecular weight of at least about 400,000, a crystalline melting point of greater than 143.degree. C., the reduction of said melting point upon remelting being at least 3.degree. C., and a crystal morphology comprising a bimodal distribution of molecular chain fold spacings reflecting significant populations of both folded and very highly extended molecular chains, and (b) about 0.5 to 90% by weight of at least one filler compound having a neutral-to-acidic surface, said polyethylene being polymerized onto the surface of said filler, and said composite being substantially free of polymer-free filler and of filler-free polymer. Also provided are processes for the preparation of such composites.

Abstract: This invention relates to polyolefin composites, and to processes for drying fillers and catalytically-active fillers for use in preparing homogeneous polyolefin composites.

Abstract: The invention provides high impact resistant heat formable composites comprising an addition polymer or copolymer, a metal oxide or metal carbonate filler and oriented thermoplastic elastomeric fibers.

Abstract: A process for preparing an ultrahigh molecular weight linear polyethylene (UHMWLPE) exhibiting a combination of properties including a creep resistance of less than 1% demonstrated under exposure to a temperature of 23.degree. C. (+ or -1.degree. C.) and a relative humidity of 50 (+ or -2% for 24 hours under a compression of 1000 psi) without sacrificing excellent tensile and flexural properties. The invention includes the use of an inert gas and a prescribed pattern of heating and cooling including a further heat and cooling treatment to create the superior properties of the UHMWLPE. Also included is the product of the process invention.

Abstract: An aqueous solution of precursors for biologically active glass, support particles coated with the solution, support particles coated with the glass, spheroidal particles of biologically active glass, processes for making the solution, coating the support, and for making the coated support and the spheroidal glass particles. The materials that comprise the biologically active glass are useful in prosthetic devices and implants for the human body.

Abstract: A composite consisting essentially of a polymer matrix and thermoplastic elastomeric fibers is disclosed. During preparation, elastomeric fibers are embedded in polymer or polymer precursor under from about 0 tension to tension only sufficient to eliminate slack and develop tension as the composite is formed. The composite is impact resistant and capable of elongation.

Abstract: Compounds having the formula: ##STR1## where X is F or Cl, and a process for the preparation of such compounds.

Abstract: An aqueous solution of precursors for biologically active glass, support particles coated with the solution, support particles coated with the glass, spheroidal particles of biologically active glass, processes for making the solution, coating the support, and for making the coated support and the spheroidal glass particles. The materials that comprise the biologically active glass are useful in prosthetic devices and implants for the human body.

Abstract: Heat storage composite consisting essentially of about 2-55% of an organic latent heat material and about 45-98% of a filled ethylene polymer.

Abstract: Improved 1-olefin polymerization catalyst system, and process employing same, comprising a reaction product of alumina and an organometallic compound of the formula (RCH.sub.2).sub.4 M wherein M is Ti, Zr or Hf and R is a group which is such that there is no hydrogen atom attached to an atom which is in the .beta.-position to M, the improvement characterized in that the preformed catalyst system is controlled in its mode of action and is protected from impurities by mixing with it an oxide, hydroxide, or carbonate of magnesium, calcium, strontium, or barium.

Abstract: Contacting selected polymers with Cl.sub.2 O or HOCl to effect (1) substitution of chlorine for hydrogen bonded to carbon, and (2) crosslinking when the polymer contains carbon-carbon unsaturation.

Abstract: In a process for polymerizing a 1-olefin with a catalyst system comprising a reaction product of a porous alumina and an organometallic compound of the formula (RCH.sub.2).sub.4 M wherein M is Ti, Zr, or Hf and R is a group which is such that there is no hydrogen atom attached to an atom which is in the .beta.-position to M, and more specifically, R is aryl, aralkyl, tertiary alkyl, for example, trialkylmethyl, or trialkylsilyl, the improvement characterized in that the alumina has an average pore diameter of at least about 150 A and/or at least about 10% of the total pore volume of the alumina is provided by pores having diameters greater than about 200 A.

Abstract: Compounds having the formula: ##STR1## where X is F or Cl, a process for the preparation of such compounds, addition copolymers of such compounds with other ethylenically unsaturated monomers, the process of preparation of such copolymers, and derivatives of such copolymers obtained by reaction of the acid halide groups and other compounds.

Abstract: In the production of elastomeric polypropylene by polymerizing propylene in the presence of a catalyst system which is the reaction product of a metal oxide and and an organometallic compound of Zr, Ti or Hf under conditions such that the reaction medium contains liquid propylene, a fluid, mobile slurry of polypropylene in propylene is formed by mixing the components of the catalyst system together in the presence of the propylene to be polymerized.

Abstract: Solid, homogeneous, particulate, highly-filled polyolefin composites which comprise(a) about 10-75% by weight of polyolefin having an inherent viscosity of at least about 2, and(b) about 25-90% by weight of finely-divided, inorganic filler compound having catalytically-active transition metal compound interacted at its surface,said polyolefin being polymerized onto the surface of said filler, and said composite having a 10-second micronization homogeneity of at least about 50% and a micronization homogeneity index of at least about 20. Methods of preparing these composites and methods of forming objects having outstanding properties from these composites are described.

Abstract: Shaped polyolefin objects having decorative metal coatings are obtained by (1) cold compressing a solid, substantially homogeneous, particulate, highly-filled polyolefin composite containing polyolefin, particularly polyethylene, and at least 33% by weight of filler including at least 10% of conductive carbon and, optionally, an inorganic filler compound, in which the polyolefin is polymerized onto the surface of the filler, (2) sintering the compressed shaped object, and (3) electroplating the sintered object.

Abstract: Solid, homogeneous, ethylene polymer/acrylonitrile polymer composites which comprise(a) about 5 to about 65% by weight of a high molecular weight ethylene polymer such as polyethylene, and(b) about 35 to about 95% by weight of a solid acrylonitrile polymer such as polyacrylonitrile powder or fiber,In which essentially all of the ethylene polymer is polymerized onto the surface of the acrylonitrile polymer and essentially all of the acrylonitrile polymer has ethylene polymer polymerized onto its surface are prepared by polymerizing ethylene onto the surface of the acrylonitrile polymer in the presence of a hydrocarbon-soluble, organo-transition metal compound such as tetrabenzylzirconium and an organoaluminum compound such as triisobutylaluminum. Composites in which the acrylonitrile polymer is in the form of a fabric are particularly useful for the preparation of laminates.

Abstract: Described is a process for preparing low viscosity inorganic filler dispersions which comprises dispersing a large amount of finely divided inorganic filler compound as a slurry in a hydrocarbon diluent at all times in the presence of certain organoaluminum compounds. This process is particularly useful for preparing dispersions used in the preparation of polyolefin/inorganic filler compositions, especially polyolefin/inorganic filler compositions prepared in the presence of a catalytic transition metal compound.