Patent classifications
C08F2500/01
Polymerization of Purge Stream Containing 1-Octene
The present disclosure provides a process. In an embodiment, the process includes providing a purge stream containing octene monomer. The process includes contacting, under polymerization conditions, the purge stream with a bis-biphenylphenoxy catalyst, and forming an octene polymer having an absolute weight average molecular weight (Mw(Abs)) greater than 1,300,000 g/mol and a Mw(Abs)/Mn(Abs) from 1.3 to 3.0.
Polymerization of Purge Stream Containing 1-Octene
The present disclosure provides a process. In an embodiment, the process includes providing a purge stream containing octene monomer. The process includes contacting, under polymerization conditions, the purge stream with a bis-biphenylphenoxy catalyst, and forming an octene polymer having an absolute weight average molecular weight (Mw(Abs)) greater than 1,300,000 g/mol and a Mw(Abs)/Mn(Abs) from 1.3 to 3.0.
Polymerization of C6-C14 a-Olefin Monomers and Polymers Thereof
The present disclosure provides a process. In an embodiment, the process includes contacting, under polymerization conditions, one or more C.sub.6-C.sub.14 α-olefin monomers with a bis-biphenylphenoxy catalyst. The process includes forming a polymer composed of one or more C.sub.6-C.sub.14 α-olefin monomers, and having an absolute weight average molecular weight (Mw.sub.(abs)) greater than 1,300,000 g/mol and a Mw.sub.(abs)/Mn.sub.(abs) from 1.3 to 3.0.
Polymerization of C6-C14 a-Olefin Monomers and Polymers Thereof
The present disclosure provides a process. In an embodiment, the process includes contacting, under polymerization conditions, one or more C.sub.6-C.sub.14 α-olefin monomers with a bis-biphenylphenoxy catalyst. The process includes forming a polymer composed of one or more C.sub.6-C.sub.14 α-olefin monomers, and having an absolute weight average molecular weight (Mw.sub.(abs)) greater than 1,300,000 g/mol and a Mw.sub.(abs)/Mn.sub.(abs) from 1.3 to 3.0.
Methods and systems for operating a high pressure ethylene polymerization unit
Disclosed are high-pressure polymerization methods and systems using optimized operation sequence logic established at least partly from an analysis of a database containing data of previous operations. The optimized operation sequence logic and collected current process and system data are used to automate the operation of a high pressure ethylene polymerization process and unit.
Producing polyolefin products
Catalyst systems and methods for making and using the same. A method of methylating a catalyst composition while substantially normalizing the entiomeric distribution is provided. The method includes slurrying the organometallic compound in dimethoxyethane (DME), and adding a solution of RMgBr in DME, wherein R is a methyl group or a benzyl group, and wherein the RMgBr is greater than about 2.3 equivalents relative to the organometallic compound. After the addition of the RMgBr, the slurry is mixed for at least about four hours. An alkylated organometallic is isolated, wherein the methylated species has a meso/rac ratio that is between about 0.9 and about 1.2.
Drag Reducing Agent
The present disclosure provides a drag reducing agent. In an embodiment, the drag reducing agent includes a polymer and a liquid carrier. The polymer is composed of one or more C.sub.6-C.sub.14 α-olefin monomers. The polymer includes a residual amount of zirconium. The polymer has an absolute weight average molecular weight (Mw.sub.(Abs)) greater than 1,300,000 g/mol and a (Mw.sub.(Abs)/Mn.sub.(Abs) from 1.3 to 3.0.
Drag Reducing Agent
The present disclosure provides a drag reducing agent. In an embodiment, the drag reducing agent includes a polymer and a liquid carrier. The polymer is composed of one or more C.sub.6-C.sub.14 α-olefin monomers. The polymer includes a residual amount of zirconium. The polymer has an absolute weight average molecular weight (Mw.sub.(Abs)) greater than 1,300,000 g/mol and a (Mw.sub.(Abs)/Mn.sub.(Abs) from 1.3 to 3.0.
Preparation of bimodal rubber, thermoplastic vulcanizates, and articles made therefrom
Pellet-stable olefinic copolymer bimodal rubber is made using parallel reactors, with one reactor synthesizing higher molecular weight (MW) rubber with dual catalysts, with an improved molecular weight split ratio and an improved composition distribution of the moderate and ultra-high MW components, while another reactor synthesizes random isotactic polypropylene copolymer (RCP). The effluents are reactor-blended and result in pellet-stable bimodal rubber (P-SBR), which may be pelletized. When making thermoplastic vulcanizates (TPVs) with P-SBR, the need to granulate rubber bales and subsequently use talc, clay, or other anti-agglomeration agents to prevent granulated rubber crumbs from agglomerating are eliminated. TPVs made with P-SBR have vulcanized rubber particles that are smaller and more uniform in size, resulting in TPVs with higher particle counts and more thermoplastic “ligaments” between the particles, with such ligaments being made stronger by the added RCP. Such thus-produced TPVs have a lower hysteresis and flexural modulus, and better elastic properties.
Preparation of bimodal rubber, thermoplastic vulcanizates, and articles made therefrom
Pellet-stable olefinic copolymer bimodal rubber is made using parallel reactors, with one reactor synthesizing higher molecular weight (MW) rubber with dual catalysts, with an improved molecular weight split ratio and an improved composition distribution of the moderate and ultra-high MW components, while another reactor synthesizes random isotactic polypropylene copolymer (RCP). The effluents are reactor-blended and result in pellet-stable bimodal rubber (P-SBR), which may be pelletized. When making thermoplastic vulcanizates (TPVs) with P-SBR, the need to granulate rubber bales and subsequently use talc, clay, or other anti-agglomeration agents to prevent granulated rubber crumbs from agglomerating are eliminated. TPVs made with P-SBR have vulcanized rubber particles that are smaller and more uniform in size, resulting in TPVs with higher particle counts and more thermoplastic “ligaments” between the particles, with such ligaments being made stronger by the added RCP. Such thus-produced TPVs have a lower hysteresis and flexural modulus, and better elastic properties.