Abstract: A polymer composition that includes a blended resin having a viscosity below 10 pascal-seconds before exposure to actinic radiation is provided. The blended resin includes a first base component that is photocurable, and the first base component includes (i) a first siloxane polymer including a plurality of thiol groups and (ii) a second siloxane polymer including a plurality of functional groups with unsaturated carbon-carbon bond. The blended resin also includes a photoinitiator, a second base component that is condensation curable, and a catalyst. The first base component is configured to polymerize into a primary polymer network and the second base component is configured to polymerize into a secondary polymer network. Furthermore, the primary and secondary polymer networks together form an interpenetrating polymer network.

Abstract: A modified Ziegler-Natta procatalyst that is a product mixture of modifying an initial Ziegler-Natta procatalyst with a molecular (pro)catalyst, and optionally an activator, the modifying occurring before activating the modified Ziegler-Natta procatalyst with an activator and before contacting the modified Ziegler-Natta procatalyst with a polymerizable olefin. Also, a modified catalyst system prepared therefrom, methods of preparing the modified Ziegler-Natta procatalyst and the modified catalyst system, a method of polymerizing an olefin using the modified catalyst system, and a polyolefin product made thereby.

Abstract: The present invention aims to provide a method capable of easily and efficiently producing a vinyl ether group-containing (meth)acrylic acid ester polymer. The present invention relates to a method of producing a vinyl ether group-containing (meth)acrylic acid ester polymer, the method including group-transfer polymerizing a monomer component containing a vinyl ether group-containing (meth)acrylic acid ester represented by the following formula (1), in the presence of a carbon-carbon double bond-containing silane compound and a catalyst, wherein R1 is a hydrogen atom or a methyl group; R2 and R3 are the same as or different from each other and are each a hydrogen atom or an organic group; R4 is a hydrogen atom or an organic group; and n is an integer of 1 or more.

Abstract: Process for producing aqueous polyacrylamide solutions by polymerizing an aqueous solution comprising at least acrylamide thereby obtaining an aqueous polyacrylamide gel and dissolving said aqueous polyacrylamide gel in water, wherein the manufacturing steps are allocated to two different locations A and B and the process comprises the step of transporting an aqueous polyacrylamide gel hold in a transportable polymerization unit from a location A to a location B. Modular, relocatable plant for manufacturing aqueous polyacrylamide solutions wherein the units of the plant are located at two different locations A and B.

Abstract: Zwitterionic copolymers, coating compositions (e.g.

Abstract: This invention relates to a catalyst system including the reaction product of a support (such as a fluorided silica support that preferably has not been calcined at a temperature of 400° C. or more), an activator and at least two different transition metal catalyst compounds; methods of making such catalyst systems, polymerization processes using such catalyst systems and polymers made therefrom.

Abstract: Process for producing aqueous polyacrylamide solutions by polymerizing an aqueous solution comprising at least acrylamide thereby obtaining an aqueous polyacrylamide gel and dissolving said aqueous polyacrylamide gel in water, wherein the process is carried out in a modular, relocatable plant. The plant preferably is deployed at a location at which aqueous polyacrylamide solutions are used, for example on an oilfield or in a mining area.

Abstract: The present invention relates to a process for the preparation of a water-soluble copolymer comprising the step of reacting a monomer (a) of formula (I), (1) wherein Q1, Q2, R1 to R7 and X have the meaning as indicated in the description and claims with at least one monoethylenically unsaturated, anionic monomer (b), preferably representing a monoethylenically unsaturated monomer comprising at least one carboxy, phosphonate or sulfonate group and salts thereof, preferably their ammonium salts or alkaline-earth metal salts or alkali metal salts; and at least one monoethylenically unsaturated, non-ionic monomer (c). The present invention further relates to a copolymer obtainable by said process and its use in enhanced oil recovery (EOR), a formulation comprising said copolymer and a method of oil production uses said formulation.

Abstract: Disclosed are a polymer having a narrow molecular weight distribution prepared by living radical and a polymer manufacturing method comprising a step of performing living radical polymerization using 0.005 to 0.5 parts by mass of an oxygen radical scavenger per 100 parts by mass of a radical polymerizable monomer.

Abstract: An object of the present invention is to provide a novel method of producing a nonpolar olefin polymer (e.g., a copolymer of a nonpolar olefin and a polar olefin). The present invention provides a method of producing a polar olefin polymer or copolymer, the method including the polymerization step of polymerizing a polar olefin monomer using, as a catalyst, a polymerization catalyst composition containing: 1) a metallocene complex represented by Formula (I), which contains a central metal M that is scandium (Sc) or yttrium (Y), a ligand Cp* containing a cyclopentadienyl derivative and being bound to the central metal, monoanionic ligands Q1 and Q2, and W neutral Lewis bases L wherein W is an integer of 0 to 3; and 2) an ionic compound composed of a non-coordinating anion and a cation.

Abstract: A method of upcycling polymers to useful hydrocarbon materials. A catalyst with nanoparticles on a substrate selectively docks and cleaves longer hydrocarbon chains over shorter hydrocarbon chains. The catalyst includes metal nanoparticles in an order array on a substrate.

Abstract: A process for producing an ethylene copolymer, the process including: (a) contacting ethylene with at least one polar comonomer in the presence of at least one modifier and at least one free radical initiator in a tubular reactor under polymerization conditions including a pressure of from 225 to 270 MPa; (b) injecting the at least one free radical initiator into the reactor at a plurality of reaction zones spaced along the length of the reactor, wherein each reaction zone comprises an inlet and an outlet; (c) maintaining the temperature at the inlet of each reaction zone at 150° C. or less, and the temperature at the outlet of each reaction zone is at least 177° C.; (d) controlling the modifier flow at a rate of from 0.02 to 0.986 wt % of the copolymer; and (e) recovering the ethylene copolymer from the tubular reactor, is provided.

Abstract: A method can be used for manufacturing an ethylene-propylene-diene terpolymer for a fuel cell. A polymerization step includes subjecting an organic chelate compound forming a coordinate bond, a vanadium-based Ziegler-Natta catalyst, an organoaluminum compound, and ethylene, propylene, and diene monomers, together with a solvent, to polymerization in a reactor. A separation step includes recovering residual catalysts and unreacted monomers from the stream discharged from the reactor. An acquisition step includes recovering the solvent from the stream deprived of the residual catalysts and unreacted monomers to acquire the ethylene-propylene-diene terpolymer.

Abstract: The invention relates to a polypropylene composition comprising a propylene homopolymer or propylene-ethylene copolymer having an ethylene content of at most 1.0 wt % based on the propylene-ethylene copolymer, wherein the amount of propylene homopolymer or propylene-ethylene copolymer is at least 98 wt %, for example at least 98.5 wt %, preferably at least 99 wt %, more preferably at least 99.5, for example at least 99.75 wt % based on the polypropylene composition, wherein the polypropylene composition has a melt flow rate in the range of 0.70 to 2.4 dg/min as measured according to IS01 133 (2.16 kg/230° C.), an Mw/Mn in the range from 7.0 to 13.0, wherein Mw stands for the weight average molecular weight and Mn stands for the number average weight, an Mz/Mn is in the range from 20 to 50, wherein Mz stands for the z-average molecular weight and wherein Mw, Mn and Mz are measured according to ASTM D6474-12.

Abstract: Without significantly impacting monomer conversion, the cis-1,4 mer content of conjugated diene mer in polymers can be increased by adding one or more Lewis bases to a catalyst composition that includes a Group 3 metal atom-containing carboxylate. This effect can be seen even at above average monomer concentrations.

Abstract: Provided is a molded body having excellent heat resistance. A composition containing methyl methacrylate, methyl isobutyrate and methyl acrylate, in which a content of methyl methacrylate is 99.5% by mass or more, a concentration of methyl isobutyrate is 20 ppm by mass to 300 ppm by mass, and a concentration of methyl acrylate is 5 ppm by mass to 200 ppm by mass.

Abstract: Silica composites and supported chromium catalysts having a bulk density of 0.08 to 0.4 g/mL, a total pore volume of 0.4 to 2.5 mL/g, a BET surface area of 175 to 375 m2/g, and a peak pore diameter of 10 to 80 nm are disclosed herein. These silica composites and supported chromium catalysts can be formed by combining two silica components. The first silica component can be irregularly shaped, such as fumed silica, and the second silica component can be a colloidal silica or a silicon-containing compound, and the second silica component can act as a glue to bind the silica composite together.

Abstract: The invention relates to a process for the preparation of a propylene homopolymer or a propylene ?-olefin random copolymer comprising the step of a) preparing a propylene homopolymer or a propylene ?-olefin random copolymer, wherein the ?-olefin is chosen from the group consisting of ethylene, and ?-olefins having 4 to 10 carbon atoms, for example 1-butene or 1-hexene by contacting at least the propylene and optionally ?-olefin, with a catalyst in a gas-phase reactor at a temperature T1 and a pressure P1, wherein T1 is chosen in the range from 75 to 90° C., for example in the range from 77 to 85° C., for example in the range from 78 to 83° C., wherein P1 is chosen in the range from 22 to 30 bar to prepare a propylene homopolymer (A?) or a propylene ?-olefin random copolymer (A?).

Abstract: A method of preparing a catalyst comprising a) contacting a non-aqueous solvent, a carboxylic acid, and a chromium-containing compound to form an acidic mixture; b) contacting a titanium-containing compound with the acidic mixture to form a titanium treatment solution; c) contacting a pre-formed silica-support comprising from about 0.1 wt. % to about 20 wt. % water with the titanium treatment solution to form a pre-catalyst; and d) thermally treating the pre-catalyst to form the catalyst. A method of preparing a catalyst comprising a) contacting a non-aqueous solvent and a carboxylic acid to form an acidic mixture; b) contacting a titanium-containing compound with the acidic mixture to form a titanium treatment solution; c) contacting a pre-formed chrominated silica-support comprising from about 0.1 wt. % to about 20 wt. % water with the titanium treatment solution to form a pre-catalyst; and d) thermally treating the pre-catalyst to form the catalyst.

Abstract: The purpose of the present invention is to provide a propylene-based block copolymer, the deposition thereof on the inner wall of the polymerization vessel having been sufficiently inhibited. The propylene-based block copolymer of the present invention has a flowability evaluation value of 40% or less, the value being calculated with the following equation wherein X (sec) is the number of seconds over which 100 g of the copolymer having ordinary temperature falls from a stainless-steel funnel having an inner diameter of 11.9 mm and Y (sec) is the number of seconds over which 100 g of the copolymer which has been held at 80° C. for 24 hours under a load of 10 kg falls from the funnel having an inner diameter of 11.9 mm. Flowability evaluation value (%)={(Y/X)?1}×100.