Abstract: Substituted cyclopentenes, such as alkyl cyclopentenes, are polymerized by selected &agr;-imine complexes of nickel and palladium. The polymers are useful as molding resins or elastomers. Also disclosed herein are novel catalysts for the polymerization of cyclopentenes to form novel higher melting homopolycyclopentenes.

Abstract: Olefins such as ethylene and propylene may be polymerized by using as catalysts novel selected transition metal complexes of bis(carboximidamidatonates) in which the carboximidamidatonate groups are connected together through covalent bonds by a bridging group. The resulting polymers are useful as molding and extrusion resins.

Abstract: Transition metal imine complexes can be prepared by reacting the imine precursors, a carbonyl compound and a primary amine, in the presence of a selected transition metal compound. The complexes may be used as catalysts for olefin polymerization.

Abstract: This invention relates to a method for preparing compositions comprising terminally unsaturated polymers of low molecular weight, referred to as oligomers or macromonomers. In particular, a first oligomer composition is obtained by free radical polymerization of a reaction mixture comprising monomers. Terminally unsaturated oligomers in the first oligomer composition, or a selected portion of the composition, are reinitiated into free radicals in order to continue their oligomerization to a desired endpoint. The process is useful for preparing an oligomer composition having a controlled degree of polymerization. The process is also useful for preparing block copolymers. Such oligomer compositions or block polymers are useful for preparing engineered or structured polymers used in making various end products, including plastics, coatings, films, and dispersants.

Abstract: An improved process for spinning aramids from solution using the air gap wet spinning method involves using a coagulant that contains 1 to 1000 ppm by weight of an organic polymer that acts as a drag reducer. Improved productivity and/or finer aramid fibers is obtained with no deterioration of fiber physical properties.

Abstract: A process for preparing chemically stable compositions of tetra(hydrocarbyl)metallic compounds in solution, and an improved process for the preparation of active 1-olefin polymerization catalysts.

Abstract: There is disclosed an improved process for oxidizing cyclohexane to produce a reaction mixture containing cyclohexyl hydroperoxide and decomposing the cyclohexyl hydroperoxide to form a mixture containing cyclohexanone and cyclohexanol comprising using in the oxidation step and/or the decomposition step as a catalyst a transitional metal complex of certain 1,3-bis(pyridylimino)isoindolines.

Abstract: Hexakis(phosphite ester)chromiums of the formulaCr[P(OR).sub.3 ].sub.6are prepared by chromium-atom evaporation and cocondensation with a phosphite ester. Dihydridopentakis(phosphite ester)chromiums of the formulaCrH.sub.2 [P(OR).sub.3 ].sub.5are prepared by hydrogenation of the corresponding hexakis(phosphite ester)chromiums. Both the hexakis- and the dihydridopentakis(phosphite ester)chromiums are useful as hydrogenation catalysts.