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WO/2022/112691A1 |
The invention relates to a catalyst system based on at least one rare-earth metallocene and, as a co-catalyst, a magnesium organic compound of formula RB-(Mg-RA)m-Mg-RB, RB comprising a benzene ring substituted with the magnesium atom, w...
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WO/2022/113794A1 |
A polyethylene powder is a polyethylene powder for which the component proportion R and relaxation time T for each component satisfy < condition (1) > and < condition (2) > when the free induction decay curve yielded by the Carr-Purcell-...
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WO/2022/114904A1 |
The present invention provides a polyethylene which has excellent workability and is able to reduce injection molding defect rates, and a method for preparing same.
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WO/2022/112692A1 |
The invention relates to a catalytic system based on at least one rare-earth metallocene and, as co-catalyst, an organomagnesium compound having the formula X-Mg-RA-Mg-X, where RA is a divalent aliphatic hydrocarbon chain, interrupted or...
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WO/2022/112690A1 |
The invention relates to a diorganomagnesium compound having the formula RB-(Mg-RA)m-Mg-RB, where RB comprises a benzene ring substituted by the magnesium atom, one of the carbon atoms of the benzene ring in the ortho position of the mag...
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WO/2022/112159A1 |
Loop-Loop-gas-phase reactor polypropylene plant and process for producing polypropylene and polypropylene copolymers.
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WO/2022/114902A1 |
The present invention provides a polyethylene and a preparation method therefor, wherein the polyethylene has an improved feature of total volatile organic compounds (TVOC) that may be generated by a low-molecular weight polymer and is s...
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WO/2022/112848A1 |
A biobased polymer composition for pharmaceutical articles includes a low density polyethylene, in which at least a portion of ethylene is obtained from a renewable source of carbon. The biobased polymer composition exhibits an Emission ...
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WO/2022/108969A1 |
A method including: contacting a support material including absorbed water with trimethylaluminum (TMA) in an aliphatic hydrocarbon; removing the aliphatic hydrocarbon by distillation at a pressure greater than or equal to 0.5 atm; heati...
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WO/2022/106710A1 |
A process for the preparation of isotactic propylene polymer compositions involving the polymerisation of propylene and optionally one or more comonomers selected from ethylene and α-olefins containing 4 to 12 carbon atoms in one or mor...
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WO/2022/108804A1 |
The present invention relates to a process for polymerization of a monomer, and in particular whereby polymer particles are transferred from an upstream polymerization reactor, which process comprises: (a) discharging a mixture comprisin...
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WO/2022/108974A1 |
The present disclosure relates to supported catalyst systems for olefin polymerization, catalyst system precursors, methods of producing the precursors and catalyst systems and polyolefins formed from the catalyst systems.
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WO/2022/109518A1 |
A gas phase reactor startup process comprising providing a reactor having a vertical cylindrical portion from a distributor plate at the base to a neck at the top and comprising a fluidized bed zone therebetween, wherein above the neck a...
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WO/2022/108803A1 |
The present invention relates to a process for supply of a polymerization catalyst component to a polymerization reactor which comprises: a. Providing a first stream comprising the catalyst component, b. Providing a diluent stream in a s...
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WO/2022/107690A1 |
A polyethylene powder that has a viscosity-average molecular weight of 100,000-2,500,000 (inclusive) and that is configured such that the slope of a straight line connecting two maxima in a torque curve obtained when the powder is kneade...
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WO/2022/089423A1 |
Disclosed in the present invention is a solid component for preparing an olefin polymerization catalyst, and a preparation method therefor and an application thereof. The solid component comprises: (i) a magnesium compound as represented...
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WO/2022/091938A1 |
Provided is a method for producing a solid catalyst component for olefin polymerization, the method being characterized by having: a first production step for obtaining a contact product by bringing titanium tetrachloride, a magnesium co...
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WO/2022/094442A1 |
Disclosed herein is a method comprising discharging from a reactor to an absorber a product stream that comprises a polymer or interpolymer, a solvent and hydrochloric acid; absorbing the hydrochloric acid from the product stream in the ...
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WO/2022/085542A1 |
A block polymer (X) which comprises, as constituent units, a polyolefin structure that is derived from the polyolefin (A) described below, and another polyolefin structure that is derived from the polyolefin (B) described below. Polyol...
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WO/2022/087121A1 |
This invention relates to transition metal complexes of a multi-dentate ligand that features a neutral heterocyclic Lewis base and a second Lewis base, where the multi-dentate ligand coordinates to the metal center to form at least one 8...
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WO/2022/078492A1 |
The present invention provides a magnesium-based solid and a solid catalyst component for olefin polymerization. By means of determination based on a nitrogen adsorption method, the solid has a multimodal pore distribution and a specific...
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WO/2022/076968A1 |
Disclosed are systems and processes for distributing reactor coolant flow to the cooling jackets of a loop slurry reactor, where the reactor coolant is used to control the temperature of the loop slurry reactor in olefin polymerization. ...
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WO/2022/072180A1 |
The present disclosure relates to bis(heterocyclic-olate) Lewis base catalysts. Catalysts, catalyst systems, and processes of the present disclosure can provide high temperature ethylene polymerization, propylene polymerization, or copol...
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WO/2022/063752A1 |
An apparatus for polymerizing olefins comprising a polymerization reactor and a vessel system for pre-activating a solid catalyst component, wherein the vessel system is arranged upstream of the polymerization reactor, the vessel system ...
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WO/2022/062944A1 |
Provided is ultra-high-molecular-weight polyethylene particles. The particle size of the particles is less than that of a conventional commercially available ultra-high-molecular-weight polyethylene, and the density of the particles is s...
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WO/2022/056367A1 |
A monomer capable forming a polymer through ring-opening metathesis polymerization and capable of depolymerization thereafter through ring-closing metathesis, wherein the monomer comprises a cycloalkene having a fused ring attached there...
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WO/2022/049467A1 |
The present disclosure relates to a process for preparation of disentangled ultra-high molecular weight isotactic polypropylene. The disentangled ultra-high molecular weight isotactic polypropylene of the present disclosure has a low ent...
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WO/2022/048630A1 |
Disclosed are a catalyst spherical carrier for olefin polymerization, a preparation method therefor and an application thereof, a catalyst and an application thereof, the carrier comprising at least one magnesium-containing compound havi...
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WO/2022/046552A1 |
Processes for acylating an aromatic compound are provided. In embodiments, such a process comprises combining an aromatic compound, an acylating agent, and a catalyst composition under conditions to induce acylation of the aromatic compo...
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WO/2022/045232A1 |
A solid titanium catalyst component (I) according to the present invention is characterized by containing titanium, magnesium, halogen, and a cyclic polyvalent ester group-containing compound (a) given by formula (1).
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WO/2022/038597A1 |
A sleeve for protecting a drip pipeline from damage by birds, characterized by: the sleeve having an inner diameter larger by a factor between 2 and 4 compared to an outer diameter of the drip pipeline, and the sleeve being pervious to w...
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WO/2022/033918A1 |
A process for screening polymer from a polymer-lean vapor stream, whereby the process comprises the steps of separating an effluent stream comprising the polymer and a first mixture of hydrocarbons into a polymer-rich stream and the poly...
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WO/2022/030768A1 |
The present invention relates to a hybrid supported metallocene catalyst and a method for preparing polypropylene using same, the catalyst having high activity for propylene polymerization, introducing a long chain branch into a polyprop...
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WO/2022/029213A1 |
The present invention relates to a process for the preparation of long chain branched ethylene polymers via the polymerization, preferably slurry polymerisation, of ethylene in the presence of a catalyst system comprising a bridged metal...
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WO/2021/259337A9 |
Provided in the present invention are extra-high to ultra-high molecular weight polyethylene particles and a catalyst for preparing same. Specifically, provided in the present invention is particles having the following characteristics: ...
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WO/2022/024687A1 |
A plasticizer for resins contains an amorphous propylene-based polymer having a weight-average molecular weight (Mw), as measured by GPC, of 5,000-30,000 and a molecular weight distribution (Mw/Mn) of not more than 3.0.
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WO/2022/024476A1 |
The purpose of the present invention is to provide a modified polyolefin resin composition having a high polyethylene content, said modified polyolefin resin composition achieving good adhesion to polyethylene substrates and metals and g...
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WO/2022/011812A1 |
The present invention relates to the field of olefin polymerization reactions, and provides a magnesium ethoxide carrier and a preparation method therefor, and a magnesium ethoxide carrier Ziegler-Natta catalyst, a preparation method the...
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WO/2022/015547A1 |
Propylene and butene random copolymers are disclosed that have excellent stiffness properties and excellent transparency characteristics especially when combined with one or more nucleating agents. The propylene-butene copolymers can be ...
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WO/2022/004205A1 |
Provided is a method for producing a solid catalytic component which is for olefin polymerization and is obtained by a production method using an organic solvent other than an aromatic hydrocarbon, and which, when provided for the polyme...
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WO/2021/260562A1 |
The invention relates to a method for synthesising macromolecules made up of units U that are mostly monosaccharides or monosaccharide derivatives, by successive elongation of a first unit U1 attached by a covalent bond to an anchor mole...
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WO/2021/260664A1 |
The present disclosure relates to a Ziegler-Natta catalyst system comprising a pro-catalyst, a co-catalyst and a selectivity control agent. The pro-catalyst comprises a magnesium compound, a titanium compound and a multi-dentate internal...
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WO/2021/254972A1 |
The present invention relates to a method for preparing a catalyst, and in particular provides a method for preparing a catalyst suitable for the polymerisation of ethylene and/or propylene, said catalyst comprising a compound of yttrium...
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WO/2021/253312A1 |
An enhanced reaction system and method for preparing polypropylene by means of a slurry process. The enhanced reaction system comprises: a prepolymerization reactor (10) and a polymerization reactor (20), which are connected in order. Th...
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WO/2021/253310A1 |
Disclosed are a micro-interface strengthening reaction system and method for preparing poly-α-olefin. The system comprises a first polymerization reactor (11) and a second polymerization reactor (12), which are sequentially connected, w...
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WO/2021/253311A1 |
Disclosed are a micro-interface strengthened reaction system and a method for preparing polyethylene by means of a solution method. The system comprises: a pre-polymerization reactor (10) and a polymerization reactor (20) connected in se...
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WO/2021/250054A1 |
It is provided a process for producing an ethylene copolymer comprising compressing ethylene monomer at a certain pressure; adding a fresh comonomer in liquid form and, optionallly, a fresh modifier in liquid form at a certain pressure t...
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WO/2021/246338A1 |
A polypropylene-based resin composition characterized by containing 2-30 mass% of a polypropylene resin (X1) having specific characteristics, 5-98 mass% of a polypropylene resin (X2) having specific characteristics, and 0-80 mass% of a p...
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WO/2021/243936A1 |
Disclosed are a sphere-like super-macroporous mesoporous material, a polyolefin catalyst, and a preparation method therefor and an olefin polymerization process. A sphere-like super-macroporous material has a two-dimensional hexagonal or...
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WO/2021/240955A1 |
The present invention provides a method for producing a catalyst for olefin polymerization, said catalyst exhibiting excellent catalytic activity during the polymerization of olefins by being suppressed in decrease of polymerization acti...
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