Abstract: Compositions are provided which include blends of (A) branched and/or bimodal ethylene copolymers and (B) linear ethylene copolymers. The branched and/or bimodal ethylene copolymers may be produced using a dual metallocene catalyst system comprising two different metallocene catalysts: one capable of producing high Mooney-viscosity polymers and one suitable for producing polymers having at least a portion of vinyl terminations. The linear ethylene copolymers may be produced using a metallocene catalyst capable of producing high Mooney-viscosity polymers, which may be the same as such catalyst of the dual metallocene catalyst system. Processes for making such blends, including parallel and/or series polymerization processes, are also provided. The blends may have excellent cure properties suitable in curable rubber compound applications.

Abstract: Processes are provided which include copolymerization using two different metallocene catalysts, one capable of producing high Mooney-viscosity polymers and one suitable for producing lower Mooney-viscosity polymers having at least a portion of vinyl terminations. The two catalysts may be used together in polymerization to produce copolymer compositions of particularly well-tuned properties. For instance, polymerizations are contemplated to produce high-Mooney metallocene polymers that exhibit excellent processability and elasticity, notwithstanding their high Mooney viscosity. Other polymerizations are also contemplated in which lower-Mooney metallocene polymers are produced, which also exhibit excellent processability and elasticity, while furthermore having excellent cure properties suitable in curable elastomer compound applications.

Abstract: This invention relates to a polymerization process for forming polymer comprising: contacting (typically in a solution or slurry phase), a monomer and a catalyst system in a reaction zone comprising at least one spiral heat exchanger and recovering polymer, wherein the monomer, the catalyst system and the polymer flow through the at least one spiral heat exchanger in a cross-flow direction relative to spirals of the at least one spiral heat exchanger.

Abstract: This invention relates to a polymerization process for forming polymer comprising: contacting (typically in a solution or slurry phase), a monomer and a catalyst system in a reaction zone comprising at least one spiral heat exchanger and recovering polymer, wherein the monomer, the catalyst system and the polymer flow through the at least one spiral heat exchanger in a cross-flow direction relative to spirals of the at least one spiral heat exchanger.

Abstract: The present disclosure provides copolymers comprising from about 0.5 wt % to about 25 wt % cyclic olefin content and films comprising the copolymers. In one embodiment, a copolymer includes a C2-C40 monomer content of from about 75 wt % to about 99.5 wt %; and a C5-C40 cyclic olefin comonomer content of from about 0.5 wt % to about 25 wt %. The copolymer has a density of about 0.91 g/cm3 to about 0.933 g/cm3. Films of the present disclosure can have advantageous mechanical properties (such as melt strength) and optical properties (such as haze %).

Abstract: High molecular weight elastomers, such as ethylene-propylene-diene monomer (EPDM) polymers, are conventionally formulated with a post-polymerization oil extension to mitigate their high Mooney viscosity. Post-polymerization oil extension adds to processing costs and precludes use of polymerization facilities lacking oil extension capabilities. A low molecular weight polymer may be co-produced with a high molecular weight elastomer containing the same monomers, where the low molecular weight polymer may function in place of conventional oil extension. Polymerization methods may comprise: combining one or more olefinic monomers, a metallocene first catalyst component and a non-metallocene transition metal second catalyst component, and a solvent; and reacting the one or more olefinic monomers under solution polymerization conditions to form a polyolefin blend comprising first and second polyolefins having a bimodal molecular weight distribution.

Abstract: This invention relates bisindenyl metallocene catalyst compounds having long (at least 4 carbon atoms) linear alkyl groups substituted at the two position and substituted or unsubstituted aryl groups at the four position and process using such catalyst compounds, particularly in the solution process at higher temperatures.

Abstract: The present invention relates to a branched modifier and a composition comprising more than 25 wt % (based on the weight of the composition) of one or more linear ethylene polymers having a g?vis of 0.97 or more and an Mw of 20,000 g/mol or more and at least 0.1 wt % of a branched modifier where the modifier has a) a g?vis of 0.70 or less; b) an Mw of 100,000 g/mol or more; c) an Mw/Mn of 4.0 or more; d) a shear thinning ratio of 110 or more, e) a melt strength of 10 cN or more; f) a complex viscosity at 0.1 rad/sec at 190° C. of at least 130,000 Pa·s; and g) a phase angle of Z° or less where Z=138.3G*(?0.142), where G* is the complex modulus reported in Pascals measured at 190° C. and the phase angle units are reported in degrees, wherein the G* is from 1,000 to 1,000,000 Pa.

Abstract: It has become desirable to limit or exclude aromatic solvents, such as toluene, from polymerization reactions. For polymerization reactions employing a non-metallocene transition metal complex as a precursor to a polymerization catalyst, exclusion of aromatic solvents may be difficult due to the limited solubility of such complexes in aliphatic hydrocarbon solvents. Aliphatic hydrocarbon solutions suitable for conducting olefin polymerization reactions, particularly solution polymerization reactions, may comprise: a non-metallocene transition metal complex dissolved in an aliphatic hydrocarbon solvent at a concentration ranging from about 2 mM to about 20 mM at 25° C. in the presence of an organoaluminum compound. A molar ratio of aluminum of the organoaluminum compound to transition metal of the transition metal complex is about 1:1 or greater, and the organoaluminum compound comprises at least about 8 carbons per aluminum.

Abstract: Disclosed is a solution polymerization process, or, alternatively, a method of delivering powder catalysts to a solution polymerization reactor, comprising combining a homogeneous single-site catalyst precursor with ?-olefin monomers to form a polyolefin, wherein the homogeneous single-site catalyst precursor is in the form of (i) a dry powder, (ii) suspended in a aliphatic hydrocarbon solvent, or (iii) suspended in an oil or wax, wherein the homogeneous single-site catalyst precursor is at a concentration greater than 0.8 mmole/liter when suspended in the aliphatic hydrocarbon solvent prior to entering the solution polymerization reactor.

Abstract: This invention relates bisindenyl metallocene catalyst compounds having long (at least 4 carbon atoms) linear alkyl groups substituted at the two position and substituted or unsubstituted aryl groups at the four position and process using such catalyst compounds, particularly in the solution process at higher temperatures.

Abstract: The present disclosure provides methods for producing an olefin polymer including: i) contacting alpha-olefin with a first catalyst system comprising a first non-metallocene catalyst, a first activator, and a reversible chain transfer agent to form a first polymer; ii) contacting the first polymer with a coupling agent in the presence of a catalyst, an activator; and iii) obtaining a second polymer. The present disclosure further provides polymers having a g?vis value from about 0.4 to about 0.8 and a vinyl unsaturation content of 0.8 or greater vinyls/1000 carbons, and preferably low gel content.

Abstract: Disclosed are self-assembled propylene-based bi-layer compositions having a skin layer comprising a propylene-based elastomer-toughened composition and a core layer comprising a propylene-based fiber-reinforced composition, wherein the propylene-based elastomer-toughened composition and propylene-based fiber-reinforced composition self-assemble upon mixing into the skin layer and the core layer. Processes for producing these self-assembled propylene-based compositions are also disclosed.

Abstract: This invention relates to the use of pyridyldiamido and/or quinolinyldiamido transition metal complexes and catalyst systems with an activator and a metal hydrocarbenyl chain transfer agent, such as an aluminum vinyl-transfer agent (AVTA), to produce branched ethylene copolymers, preferably ethylene-butene, ethylene-hexene and ethylene-octene copolymers.

Abstract: This invention relates homogeneous (typically solution) polymerization of propylene and optional olefin comonomer using metallocene catalyst compounds having a 1,5,6,7-tetrahydro-s-indacenyl moiety bridged to another indacenyl moiety or bridged to a substituted or unsubstituted indenyl moiety.

Abstract: The present disclosure provides the use of quinolinyldiamido transition metal complexes, an activator and a metal hydrocarbenyl chain transfer agent, such as an aluminum vinyl-transfer agent, to produce long chain branched propylene polymers.

Abstract: The present disclosure provides the use of quinolinyldiamido transition metal complexes, an activator and a metal hydrocarbenyl chain transfer agent, such as an aluminum vinyl-transfer agent, to produce long chain branched propylene polymers.

Abstract: In some embodiments, ethylene-propylene random copolymers as viscosity modifiers were synthesized with pyridyldiamido catalyst systems and a chain transfer agent. In some embodiments, the present disclosure provides for ethylene-propylene random copolymers having an ethylene content between about 45 wt % and about 55 wt %. In some embodiments, the ethylene-propylene random copolymer is used as a viscosity modifier in a lubricating composition and a fuel composition.

Abstract: In some embodiments, ethylene-propylene branched copolymers are synthesized with pyridyldiamido catalysts and a chain transfer agent, and their performance as viscosity modifiers in oil are detailed. In some embodiments, the present disclosure provides for ethylene-propylene branched copolymers having a shear thinning onset of less than about 0.01 rad/s and an HTHS value of less than about 3.3. In some embodiments, the ethylene-propylene branched copolymer is used as a viscosity modifier in a lubricating composition and a fuel composition.

Abstract: A crack-resistant article comprising a diene terpolymer, the diene terpolymer comprising (or consisting essentially of) from 0.01 wt % to 10.0 wt % diene derived units, and 1.0 wt % to 20 wt % of C4 to C10 ?-olefin derived units based on the weight of the diene terpolymer, wherein the diene terpolymer: a) has a g?vis of less than 0.90; b) has an Mw within a range of from 100,000 g/mol to 500,000 g/mol; c) has an Mw/Mn within the range of from 3.5 to 12.0; and d) an Mz/Mn of greater than 7.0. Inventive articles comprise a blend of a relatively high density linear polyethylene and the diene terpolymer.