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7622536 |
Apparatus and method for the production of polyethylene and ethylene copolymers
The invention relates to an apparatus for the high pressure polymerisation of ethylene which comprises a high pressure reactor; a conduit for the supply of ethylene to the reactor, the conduit...
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7619046 |
Production of polymers in a conical reactor
The present invention provides a process for the preparation of polymer which comprises the steps of i) feeding an aqueous mixture comprising a monoethylenically unsaturated monomer or a mixture of...
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7605214 |
Process for stopping continuous polymerization
The present invention provides a process for stopping continuous polymerization in which a raw material monomer is polymerized in a reaction vessel by continuously feeding the raw material monomer...
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7601786 |
Tubular reactor with coaxial cylinders and process using this reactor
A process of preparing a liquid reaction product in a column reactor, which reactor comprises a space between coaxial tubular interior surfaces comprising an inner interior surface and an outer...
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7601409 |
Stretch film
Stretch films are disclosed, the films having at least one layer formed of or including a polyethylene copolymer and having a natural draw ratio of at least 250%, a tensile stress at the natural...
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7524903 |
Process and apparatus for the polymerization of propylene
A process for preparing heterophasic propylene copolymers by polymerizing propylene in the presence of a polymerization catalyst and hydrogen as a molecular weight regulator, the process comprising...
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7514508 |
Process for the polymerization of ethylene
Process for preparing a broad molecular weight polyethylene by polymerizing ethylene in the presence of a polymerization catalyst, the process comprising the following steps, in any mutual order:
...
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7504462 |
Process for producing olefin polymer
Disclosed is to provide a process for producing an olefin polymer by continuous polymerization according to which the transition metal compound and the co-catalyst component promptly contact after...
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7491775 |
Polymerization processes
A process for preparing a polymer comprising selecting temperatures and amounts of a polymerization medium, a surfactant, a monomer or polymer seed, and any desired additives to achieve an initial...
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7488780 |
Process for preparing vinyl chloride copolymer resin
The present invention relates to a process for preparing a vinyl chloride copolymer resin by copolymerizing a vinyl chloride type monomer and a macromonomer having a polymer comprising an...
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7465772 |
Apparatus for continuous polymerization of olefin, method for transferring a polymer powder, and method for continuous polymerization of olefin
An apparatus and method for continuous polymerization of olefin(s), and a method for transferring a polymer powder from one reactor to another in the apparatus are disclosed. The apparatus includes...
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7465771 |
Process for producing radical polymer and microapparatus for chemical reaction
The present invention provides a method for producing a radical polymer having controlled molecular weight distribution or a narrow molecular weight distribution profile, comprising feeding a...
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7459506 |
Segmented agitator reactor
The present invention relates to an apparatus for carrying out chemical and physical processes, wherein flowable substances are mixed together, comprising a vertical, cylindrical vessel with inlets...
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7446156 |
Swirling fluidized-bed reactors for olefin polymerization
A method for polymerizing olefins in a fluidized-bed reactor is provided. The method involves introducing a fluid into the fluidized-bed reactor at an angle and amount sufficient to induce one or...
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7423099 |
Process for producing polyolefin
A process for producing a polyolefin comprising a combination of liquid phase polymerization of α-olefin conducted in one or more liquid phase polymerization reactors and gas phase polymerization...
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7405260 |
Method for controlling the polymer flow in a polymerization process
A method for controlling the flowability of polymer particles flowing downward in a densified form inside a polymerization reactor, in which one or more monomers are gas-phase polymerized in the...
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7399811 |
Nanohybrid polymers for ophthalmic applications
The present invention relates to novel materials particularly useful for ophthalmic applications and methods for making and using the same. More particularly, the present invention relates to...
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7396889 |
Method for preparing a diene elastomer
A method for preparing a diene elastomer, such as a butadiene homopolymer or copolymer, in particular, a polybutadiene, with a high level of cis-1,4 linkages that has both a Mooney viscosity...
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7378473 |
Process for producing colored spherical polymer particles
Monodisperse colored spherical particles each having two separated color regions of two hues, that is, two-colored spherical particles, useful, for example, for displays of characters, graphics,...
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7351776 |
Bulk polymerization process
A method for the continuous production of polydienes, the method comprising the steps of (a) charging a mixture of one or more monomer, catalyst system, and less than 50% weight percent organic...
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7332549 |
Process for the (co-)polymerisation of ethylene in the gas phase
The present invention relates to a process for improving the start up of polymerization or copolymerization of ethylene in a gas phase reactor, preferably a fluidized bed gas phase reactor.
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7329713 |
Coating, laminating, and casting compositions and methods of producing and curing same
Zero VOC compositions are described and may include: one of vinyl ester solids, unsaturated polyester solids (e.g., isophthalic polyester, orthophthalic polyester, terephthalic polyester, and...
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7321016 |
Method of producing styrene polymers using high speed catalytic dispersion technology
Provided is a method of preparing styrene polymers, the method comprising: homogeneously mixing a styrene monomer; a cocatalyst mixture of Group 13 metal-containing organic metal compound...
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7307129 |
Method for preparing latex containing pigment copolymerized with a crystalline polymer
A method of preparing a latex that includes pigments copolymerized with a crystalline polymer includes: dispersing a pigment and a dispersing agent in water having an ultra-high purity to obtain a...
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7300993 |
Process for the preparation of polyether polyols
The invention relates to a process for the preparation of polyether polyols, which process involves:
(a) contacting a phosphorus containing compound having at least one hydroxyl group with...
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7300545 |
Water-soluble polymer dispersion, process for producing the same and method of use therefor
A water-soluble polymer dispersion, process for producing the same and a method of use therefor. In particular, the water-soluble polymer dispersion is one comprising water-soluble polymer fine...
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7288610 |
Method of polymerization and nozzle employed in same
A polymerization method in which a first liquid and a second liquid are mixed in a gas phase and polymerized in the form of droplets is disclosed, wherein a polymerizable monomer and a...
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7279535 |
Method for the continuous production of polymers made of vinyl compounds by substance and/or solvent polymerization
Production of vinyl polymers by the polymerization of vinyl monomers in a planetary gear extruder.
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7276565 |
Continuous miniemulsion polymerization process
A process including:
heating to a first polymerization temperature a first mixture including a free radical polymerizable monomer, a free radical initiator, and a stable free radical...
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7270791 |
Angular flow distribution bottom head
An improved angled annular deflector for a gas-phase polymerization reactor and improved method for delivery of a stream of polymerizable fluid to a gas-phase polymerization reator. The angled...
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7265190 |
Process and apparatus for production of water-absorbent resin
There is disclosed a process to uniformly and rapidly carry out the mixing of a monomer liquid and a polymerization initiator and thus for the resulting polymer not to adhere to the inner surface...
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7253239 |
Method for preventing or inhibiting fouling in a gas-phase polyolefin polymerization process
A method for preventing or inhibiting fouling in a gas-phase polyolefin polymerization process. The method includes maintaining the inside surface temperature of the process equipment below the dew...
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7247690 |
Melt-fabricable tetrafluoroethylene/fluorinated vinyl ether copolymer prepared by suspension polymerization
Melt-fabricable, tough copolymer of tetrafluoroethylene and fluorinated vinyl ether is produced in a suspension polymerization process by copolymerizing tetrafluoroethylene and fluorinated vinyl...
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7235614 |
Methods for injecting catalyst into a polymerization reactor
A polymerization process and a catalyst delivery system are provided. For example, a polymerization process is described, including providing a conduit having a catalyst inlet, a first propylene...
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7230048 |
Process for continuous production of reactive polymers with in-line post-modification and products thereof
A continuous polymerization process for producing reactive polymers comprises continuously charging into a first reaction zone at least one functional monomer and polymerizing the monomers to...
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7220803 |
Process for obtaining aqueous polymer dispersions
The process comprises the following phases: formation of a pre-emulsion of monomers in water; transfer into the polymerisation reactor with stirring, of (1) reaction stock consisting of a water...
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7138469 |
Process for the polymerization of olefins
Process for the polymerization of olefins CH 2 ═CHR, in which R is hydrogen or a hydrocarbon radical with 1–12 carbon atoms, carried out in the presence of a catalyst component (A) comprising...
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7135534 |
Polymer support for solid phase peptide synthesis and process for preparation thereof
A novel polymer support for solid phase peptide synthesis comprising polystyrene backbone and propoxylate function of hexanedioldiacrylate crosslinks having optimum hydrophilic/hydrophobic balance...
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7119132 |
Continuous neat polymerization and ambient grinding methods of polyolefin drag reducing agents
A process for continuously producing a polymer drag reducing agent (DRA) is described. The process concerns mixing a monomer and a catalyst in at least one continuously stirred tank reactor (CSTR)...
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7101927 |
Latex obtainable by a gradient regime reaction
A latex having a reduced amount of 4-phenylcyclohexene is obtainable by reacting A) 30–90% by weight of at least one ethylenically unsaturated monomer; B) 70–10% by weight of a diene; C)...
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7098281 |
Plastic optical fiber, optical fiber cable, optical fiber cable with plug, method for producing methyl methacrylate based polymer and method for producing plastic optical fiber
This invention provides a process for manufacturing a methyl methacrylate polymer comprising the steps of feeding a monomer containing at least 80 wt % of methyl methacrylate and a radical...
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7078467 |
Single catalyst low, medium and high density polyethylenes
A method of polymerizing olefins comprising combining in one embodiment ethylene and optionally one or more α-olefins with a catalyst composition in a continuous polymerization reactor at a...
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7063839 |
Continuous method and apparatus for separating polymer from a high pressure carbon dioxide fluid stream
A method for continuously separating polymer from a high pressure fluid stream comprises subjecting the high pressure fluid stream comprising polymer particles to a filter, wherein the filter...
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7056990 |
Process for producing mid-range vinylidene content polyisobutylene polymer products
A process for making a relatively low molecular weight, mid-range vinylidene content PIB polymer product comprising a liquid phase polymerization process conducted in a loop reactor at a...
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7041751 |
Method of polymerizing predetermined chemical components
A method of conducting polymerisation reactions on a rotating surface reactor which allows substantially increased conversions (up to around 99%) to be achieved without a corresponding increase in...
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7015289 |
Process and apparatus for reducing take-off valve plugging in a polymerization process
A slurry polymerization process removes a portion of the fluid slurry without using a settling leg or a continuous take-off. The process uses a reactor take-off valve that is periodically fully...
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6992152 |
Apparatus and method for controlling olefin polymerization process
Apparatus for olefin polymerization includes one or more shell and tube olefin polymerization reactors, each of which has an olefin polymerization reaction mixture inlet connection and a crude...
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6946529 |
Method for producing an aqueous polymer dispersion by radical aqueous emulsion polymerization with a continually produced aqueous monomer emulsion
A method for producing an aqueous polymer dispersion by radical emulsion polymerization of an aqueous monomer emulsion, wherein the monomer emulsion is produced continually according to consumption...
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6943223 |
Controlled shear and turbulence flow pattern within a liquid in a vessel
The present invention provides a process to create without mechanical agitation a zone of low shear, low turbulence flow pattern within a continuous liquid phase contained in a vessel and...
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6914105 |
Continuous process for making polymers in carbon dioxide
A method for carrying out the continuous polymerization of a monomer in a carbon dioxide reaction medium comprises the steps of: (a) providing an apparatus including a continuous reaction vessel...
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