Abstract: A composition comprising: (a) polyethylene; (b) as a scorch inhibitor, 4,4′-thiobis(2-methyl-6-t-butylphenol); 2,2′ thiobis(6-t-butyl-4-methylphenol); or mixtures thereof; (c) optionally, a cure booster; and (d) an organic peroxide.

Abstract: A process comprising contacting one or more monomers with a catalyst, in the gas phase, under polymerization conditions, in a fluidized bed reactor, with the proviso that the reactor is at least partially cooled internally by the vaporization of a liquid cryogen directly into the reactor.

Abstract: A catalyst composition for the polymerization of olefins is provided, which comprises a) a catalyst comprising a metal atom complexed with a non-cycloalkadienyl anionic ligand, wherein the chemical hardness, .eta., and chemical potential, .mu., of said non-cycloalkadienyl anionic ligand calculated using the MOPAC (PM3) computer program satisfy the relationship: .eta.=3.0+0.75.mu..+-.0.2 eV; and b) an activating cocatalyst.

Abstract: A mixed catalyst composition comprising a) a solid Ziegler-Natta catalyst; b) a liquid single site catalyst; and c) at least one activating cocatalyst is provided. Polymers having a broad or bimodal molecular weight distribution may be made with this catalyst composition.

Abstract: There is provided a process for drying a fluidized reactor system comprising introducing a boiling point depressing agent into said system optionally while heating said system.

Abstract: A catalyst precursor having the formula: ##STR1## wherein M is a Group IVB metal; each L is a monovalent, bivalent, or trivalent anion;X and Y are each heteroatoms;each Cyclo is a cyclic moiety;each R.sup.1 is a group containing 1 to 50 atoms selected from the group consisting of hydrogen and Group IIIA to Group VIIA elements, and two or more adjacent R.sup.1 groups may be joined to form a cyclic moiety;each R.sup.2 is a group containing 1 to 50 atoms selected from the group consisting of hydrogen and Group IIIA to Group VIIA elements, and two or more adjacent R.sup.2 groups may be joined to form a cyclic moiety;W is a bridging group; andeach m is independently an integer from 0 to 5.

Abstract: An article of manufacture comprising (i) a plurality of electrical conductors, each surrounded by one or more layers of a composition comprising (a) one or more polyolefins and, blended therewith, (b) a mixture containing one or more alkylhydroxyphenylalkanoyl hydrazines and one or more defined functionalized hindered amines; and (ii) hydrocarbon cable filler grease within the interstices between said surrounded conductors.

Abstract: An article of manufacture comprising (i) a plurality of electrical conductors, each surrounded by one or more layers of a mixture comprising one or more polyolefins and the reaction product of (a) a functionalized hindered amine amic acid hydrazide and (b) a functionalized hindered phenol or a functionalized hindered amine hydrazide and (ii) hydrocarbon cable filler grease within the interstices between said surrounded conductors.

Abstract: A process for producing polyethylene having a broad molecular weight distribution is provided, in which ethylene and optionally a comonomer are contacted in two reactors connected in series, one reactor containing a titanium-based catalyst and the other reactor containing a vanadium-based catalyst and a halohydrocarbon promoter, or alternatively, both reactors containing a mixed metal catalyst comprising both titanium and vanadium. In the latter case, the halohydrocarbon promoter is present in only one of the reactors to activate the vanadium sites of the catalyst and deactivate the titanium sites of the catalyst simultaneously.

Abstract: A polymer impurity deactivator comprising a metal hydroxide, a hydrotalcite, or another metal oxide compound, or mixtures thereof, each of which compounds or mixtures(i) contain at least one zinc, magnesium, or aluminum cation; and(ii) have been surface treated, or mixed, with a hydrocarbon based or siloxane based amphiphatic compound, each amphipathic compound having one or more polar groups incorporated into its molecular structure to provide a polar group frequency factor of at least about 0.01.

Abstract: A process for extruding a thermoplastic polymer comprising:(a) introducing into an extruder a copolymer of ethylene wherein one of the copolymerized monomers has the following formula:CH.sub.2 .dbd.C[(CH.sub.2).sub.n --CH.sub.3 ]-Si(OR).sub.3wherein eachR is independently a saturated aliphatic group having 1 to 4 carbon atoms; andn is 0, 1 or 2;(b) extruding the copolymer of step (a); and, thereafter,(c) contacting the extrudate with sufficient moisture to effect crosslinking.

Abstract: Water-curable compositions, based on thermoplastic polymers having pendant thereto hydrolyzable silane moieties and metal carboxylate silanol condensation catalysts, which can be water cured in a relatively short period of time to crosslinked products characterized by an excellent balance of commercially acceptable properties. The compositions of this invention are particularly useful as extrudates about wires and cables.