Abstract: Ethylene, an &agr;-olefin and, optionally, a diene monomer are polymerized in a process comprising the step of contacting (1) ethylene, (2) at least one C3-C20 aliphatic &agr;-olefin, (3) optionally, at least one C4-C20 diene, (4) a catalyst comprising (a) a metallocene complex, and (b) an activator, and (5) a solvent. The process is conducted in either a single reactor or in multiple reactors, the latter configured either in series or parallel. Solvent is removed from the polymer stream in an anhydrous, first stage solvent recovery operation such that the solids concentration of the product stream is increased by at least 100 percent. Additional solvent is removed in an anhydrous, second stage solvent recovery operation from the product of the first stage solvent recovery operation such that the solids concentration of the product stream is in excess of 65 weight percent.

Abstract: A thermoplastic elastomeric blend composition comprising: (A) from 99 to 1 weight percent of a styrenic block copolymer; and (B) from 1 to 99 weight percent of an interpolymer of .alpha.-olefin and (1) at least one aliphatic .alpha.-olefin and (2)at least one vinylidene aromatic monomer or (2) at least one hindered aliphatic vinylidene monomer or (3) a combination of at least one vinylidene aromatic monomer and at least one hindered aliphatic vinylidene monomer, and fabricated articles made from such composition.

Abstract: Substantially linear ethylene polymers, e.g., polyethylenes prepared by constrained geometry catalysis (substantially linear ethylene), which are grafted with one or more unsaturated organic compounds containing both ethylenic unsaturation and a carbonyl group, e.g., maleic anhydride, exhibit desirable adhesive properties. These graft-modified substantially linear ethylene polymers also impart desirable compatibility and impact properties to various thermoplastic polymer blends.

Abstract: Polyolefin blends characterized by melting and crystallization curves which exhibit either two distinct melt regions, or wherein one component of the blend has a low softening temperature relative to the individual components of the blend, provide an unusually wide window for solid state processing. The solid state processing characteristics of these blends are independent of the manner in which the blends are formulated, e.g. mechanical mixing, solvent dispersion, and the like.

Abstract: Substantially linear ethylene polymers, e.g., polyethylenes prepared by constrained geometry catalysis (substantially linear ethylene), which are grafted with one or more unsaturated organic compounds containing both ethylenic unsaturation and a carbonyl group, e.g., maleic anhydride, exhibit desirable adhesive properties. These graft-modified substantially linear ethylene polymers also impart desirable compatibility and impact properties to various thermoplastic polymer blends.

Abstract: Containers for foods, juices and beverages containing essential oils or flavorings are comprised of a laminate structrue in which the inner surface of the container, in contact with the foods, juices or beverage, is a halopolymer, such as a vinylidene chloride polymer, which functions as a barrier layer to substantially restrict the passage or migration of the essential oils or flavorings.

Abstract: Novel titanium compounds or complexes are prepared by reacting a titanium compound such as titanium tetraisopropoxide with a compound containing at least one aliphatic hydroxyl group. These compounds and/or complexes are useful as the transition metal component in supported Ziegler-Natta catalysts.

Abstract: Olefins are polymerized in the presence of catalysts prepared from titanium compounds prepared by reacting a titanium compound such as titanium tetraisopropoxide with a compound containing at least one aliphatic hydroxyl group.

Abstract: Novel titanium compounds or complexes are prepared by reacting a titanium compound such as titanium tetraisopropoxide with a mixture comprising (a) at least one compound containing at least one aromatic hydroxyl group and (b) at least one compound having at least one aliphatic hydroxyl group. These compounds and/or complexes are useful as the transition metal component in Ziegler-Natta catalysts.

Abstract: Olefins are polymerized in the presence of catalysts prepared from titanium compounds prepared by reacting a titanium compound such as titanium tetraisopropoxide with a compound containing at least one aliphatic hydroxyl group.

Abstract: An improved magnesium halide catalyst support is prepared by combining a magnesium component represented by the general formula R.sub.2 Mg.xAlR'.sub.3 wherein R is a hydrocarbyl or a hydrocarbyloxy group; R' is a halide, hydrocarbyl, a hydrocarbyloxy, a carboxyl or an acyl group; and x has a value such that the atomic ratio of Al:Mg is 0.025:1 to 0.25:1 with a non-metallic halide source under conditions such that the reaction temperature does not exceed 60.degree. C.

Abstract: Olefins are polymerized in the presence of catalysts prepared from titanium compounds prepared by reacting a titanium compound such as titanium tetraisopropoxide with a compound containing at least one aliphatic hydroxyl group.

Abstract: Olefins are polymerized in the presence of a catalyst containing novel titanium compounds or complexes which are prepared by reacting a titanium compound such as titanium tetraisopropoxide with a compound containing at least one aromatic hydroxyl group.

Abstract: Novel titanium compounds or complexes are prepared by reacting a titanium compound such as titanium tetraisopropoxide with a compound containing at least one aromatic hydroxyl group. These compounds and/or complexes are useful as the transition metal component in Ziegler-Natta catalysts.

Abstract: Extrusion-cast films of high molecular weight, linear, low density ethylene copolymers which inherently have high block and high cling characteristics are compounded with a minor amount of a low molecular weight organic, such as a polyglycol, before being extrusion-cast as a thin film, the low molecular weight organic serving to substantially reduce the block, but retaining high cling characteristics.

Abstract: Extrusion-cast films of high molecular weight, linear, low density ethylene copolymers which inherently have high block and high cling characteristics are compounded with a minor amount of a low molecular weight organic, such as a polyglycol, before being extrusion-cast as a thin film, the low molecular weight organic serving to substantially reduce the block, but retaining high cling characteristics.

Abstract: Chloroprene is polymerized in the presence of compounds of the formula ##STR1## where X, Y and Z are selected from the group consisting of oxygen and sulfur, R.sub.1 is a hydrocarbon radical having from 1 to 8 carbon atoms, R.sub.2 is a hydrocarbon radical having from 1 to 8 carbon atoms or is a radical the same as ##STR2## R.sub.3 and R.sub.4 are selected from the group consisting of hydrocarbon radicals having from 1 to 8 carbon atoms or hydrogen with at least one of R.sub.3 and R.sub.4 not being hydrogen and n is 1 to 4.

Abstract: Chloroprene-sulfur copolymers having improved storage stability are produced by carrying out the emulsion polymerization in the presence of organic polysulfide compounds of the formula. ##STR1## where X, Y and Z are selected from the group consisting of oxygen and sulfur, R.sub.1 is a hydrocarbon radical having from 1 to 8 carbon atoms, R.sub.2 is a hydrocarbon radical having from 1 to 8 carbon atoms or is a radical the same as ##STR2## R.sub.3 and R.sub.4 are selected from the group consisting of hydrocarbon radicals having from 1 to 8 carbon atoms or hydrogen with at least one R.sub.3 and R.sub.4 not being hydrogen and n is 1 to 4.

Abstract: Chloroprene is polymerized in the presence of compounds of the formula ##STR1## where X, Y and Z are selected from the group consisting of oxygen and sulfur, R.sub.1 is a hydrocarbon radical having from 1 to 8 carbon atoms, R.sub.2 is a hydrocarbon radical having from 1 to 8 carbon atoms or is a radical the same as ##STR2## R.sub.3 and R.sub.4 are selected from the group consisting of hydrocarbon radicals having from 1 to 8 carbon atoms or hydrogen with at least one of R.sub.3 and R.sub.4 not being hydrogen and n is 1 to 4.

Abstract: Long-chain fatty acids having conjugated unsaturation, such as tung acid, when used as emulsifiers in the polymerization of chloroprene, produce polymers having higher tensile strength than produced by similar unconjugated fatty acid emulsifiers.