Abstract: Polymer having a polymodal MWD ethylene copolymer are prepared by conducting the polymerization in a substantially mix free reactor using an essentially transfer agent free reaction mixture, the reaction being carried out in a manner such that the propagation of essentially all copolymer chains is initiated simultaneously. In carrying out the process of this invention, the catalyst components are premixed and aged prior to introduction into the reactor. The process is preferably carried out in a tubular reactor using VCl.sub.4 and aluminum sesquichloride as the catalyst system.

Abstract: Copolymers comprising ethylene, alpha-olefin, and olefinic chlorosilane or olefinic hydrocarbon halide, and method of preparing copolymers. The copolymers may be in the form of statistical copolymers, or may be formed of first and second segments. The copolymers are useful in fiberglass and rubber compositions, and for forming graft and block polymers. The copolymers may be cross-linked to form nodular copolymers. The nodular copolymers are particularly useful as lube oil additives.

Abstract: The present invention relates to novel copolymers of alpha-olefins comprised of intramolecularly heterogeneous and intermolecularly homogeneous copolymer chains.

Abstract: A separation process has been found in which a polymer-solvent solution separates into phases of highly different composition which are in equilibrium over a broad temperature range. Upon addition of the phase separating agent, which is near or above its supercritical conditions, rapid disengagement into two phases occurs. The relative volume of solvent rich phase is substantially larger than the polymer rich phase. The process can be practiced at relatively low temperatures such as those employed in polymerization or post-polymerization processes. The separation is accomplished by adding or elevating the concentration of a phase separation agent to or above a minimum effective concentration, which causes the UCST and LCST lines to merge. Suitable phase separating agents are organic and inorganic compounds that are gases at 1 atm pressure and 25.degree. C. Due to the gaseous nature of the phase separating agent, it is easily removed from the solvent phase for reuse in the process.

Abstract: Nodular copolymer and method of preparing a nodular copolymer by preparing a copolymer chain and coupling it with a coupling agent. The copolymers which form the nodular copolymer are formed of first and second segments, of which the second segments, containing the coupling agent, react to form the nodular region. The nodular copolymer is particularly useful as a lube oil additive.

Abstract: The present invention relates to polymeric composition of a first copolymer which includes at least one copolymer having at least one of Mw/Mn less than 2 and Mz/Mw less than 1.8; and a second copolymer having Mw/Mn greater than or equal to 2. The composition can be produced by preparing the first and second copolymers in different reactors and blending them. The blend can also be produced in a single reactor by initiating the reaction to prepare one copolymer, and adding additional reactants, or recycling the reaction mixture, during the reaction to produce the other copolymer.

Abstract: A process is disclosed for recovering polymer from a solution of the polymer in a solvent by high temperature phase separation in which low molecular weight hydrocarbon is added to the solution, the solution and the added hydrocarbon are subjected to a temperature and pressure so that one liquid phase is formed and the pressure is adjusted to form two phases, namely, a polymer-lean liquid phase and a polymer-rich liquid phase. The polymer-rich liquid phase is separated from the polymer-lean liquid phase, and the polymer is then recovered from the polymer-rich liquid phase.

Abstract: The present invention relates to novel copolymers of alpha-olefins comprised of intramolecularly heterogeneous and intermolecularly homogeneous copolymer chains.

Abstract: A method for preparing a polymodal MWD ethylene-alpha olefin copolymer using at least two catalysts to initiate growth of polymer chains that attain different average molecular weights. The polymodal MWD ethylene copolymer comprises at least two different molecular weight modes each mode having a narrow MWD and at least one of two characteristics (1) an Mw/Mn of less than 2 and (2) Mz/Mw of less than 1.8.

Abstract: Polymodal MWD ethylene copolymer comprising at least two modes of differing molecular weights. Each mode has at least one of M.sub.w /M.sub.n of less than 2.0, and a M.sub.z /M.sub.w of less than 1.8. The polymodal character of the copolymer is achieved by either (1) withdrawing polymer modes from the reactor from at least one takeoff port, and blending such modes with the reactor effluent, or (2) utilizing at least two catalyst species in the reaction to produce modes of differing molecular weights.

Abstract: A method of preparing a nodular polymer by preparing a copolymer chain and coupling it to a coupling agent. The coupling agent is a non-conjugated diene. Preferably the non-conjugated diene has both double bonds Ziegler catalyst polymerizable. The preferred product comprises a norbornadiene coupled ethylene copolymer wherein the ethylene copolymer has a M.sub.z /M.sub.m of less than 2.0 and a M.sub.w /M.sub.n of less than 1.8 before coupling.

Abstract: A process is disclosed for recovering polymer from a solution of the polymer in a solvent by high temperature phase separation in which low molecular weight hydrocarbon is added to the solution, the solution and the added hydrocarbon are subjected to a temperature and pressure so that one liquid phase is formed and the pressure is adjusted to form two phases, namely, a polymer-lean liquid phase and a polymer-rich liquid phase. The polymer-rich liquid phase is separated from the polymer-lean liquid phase, and the polymer is then recovered from the polymer-rich liquid phase.

Abstract: The present invention relates to novel copolymers of alpha-olefins comprised of intramolecularly heterogeneous and intermolecularly homogeneous copolymer chains.

Abstract: A process is disclosed for recovering polymer from a solution of the polymer in a solvent by high temperature phase separation in which a low molecular weight hydrocarbon is added to the solution, the solution and the added hydrocarbon are subjected to a temperature and pressure so that one liquid phase is formed and the pressure is reduced to form three phases, namely, a vapor phase rich in the hydrocarbon, a polymer-lean liquid phase and a polymer-rich liquid phase. The polymer-rich liquid phase is separated from the vapor phase and the polymer-lean liquid phase, and the polymer is then recovered from the polymer-rich liquid phase.

Abstract: A method for obtaining improved diene conversion in the manufacture of EPDM type terpolymers is disclosed in which the polymerization reaction is conducted in a series of two or more stirred reactors with substantially all of the non-conjugated diene monomer being fed to the first reactor to thereby produce a polymer that has a non-uniform diene content.

Abstract: Ziegler-type hydrocarbon-soluble catalyst systems for the polymerization of conjugated diolefins, or mixtures thereof, to obtain high molecular weight polymers possessing varying proportions of trans-1,4 units, in the range of 50-90%. The catalyst systems are based on a non-reduced salt of titanium, an organometallic compound, and an iodine-containing compound, or iodine corresponding to the generalized formula Ti(halide).sub.4 -M.sub.n I.sub.m -AlR.sub.a X.sub.3 -a, where M is aluminum or tetravalent tin, n is 0 or 1, m is the valence of M and where n is 0, m is 2, X is Cl, Br or I, a is 2 to 3, R is alkyl, halide is Cl, Br or I, and where halide is I, M.sub.n I.sub.m may be omitted.