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8178465 |
Polydispersity-controlled isoolefin polymerization with polymorphogenates
The disclosure provides for a process and polymerization system to produce isoolefin polymers (72) utilizing polymorphogenates (16, 26) in the catalyst system to control polydispersity (MWD). The...
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8163856 |
Method and system to add high shear to improve an ionic liquid catalyzed chemical reaction
In an embodiment, a method is disclosed to increase the activity of an ionic liquid catalyst comprising emulsifying the ionic liquid catalyst with one or more liquid components. In an embodiment, a...
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8071688 |
Brominated anionic styrenic polymers and their preparation
Concurrently fed into a reaction zone held at about 10° C. or less are brominating agent, aluminum halide catalyst, and a solution of anionic styrenic polymer having a GPC Mn about 2000-30,000. ...
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7897710 |
Bimodal polyethylene film
Film formed from a polyethylene resin composition which obeys a dynamic rheological relationship at 190° C. between melt storage modulus G′, measured in Pa and at a dynamic frequency where the lo...
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7868111 |
Method for producing α-olefin polymer
The present invention provides a method for producing α-olefin polymer, comprising polymerizing α-olefins in the presence of a halogen atom-containing acid catalyst by use of an aliphatic h...
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7851577 |
Polymerization process using zinc halide initiators
A cationic polymerization process for isoolefins using a zinc halide initiator. The zinc halide initiator is added to a solution of the isoolefin in a suitable solvent, preferably a halocarbon...
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7816459 |
Method for preparing polyolefins containing vinylidine end groups using polymeric nitrogen compounds
Disclosed is a method for preparing polyolefins containing vinylidine end groups from quasiliving carbocationically terminated polyolefin polymers by contacting the quasiliving carbocationically...
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7745554 |
Method for producing a polyisobutene
The invention relates to a process for preparing polyisobutene having a mean molecular weight Mn of from 400 to 50 000, in particular from 500 to 10 000, by polymerizing isobutene in the presence...
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7741416 |
Colloidal photonic crystals using colloidal nanoparticles and method for preparation thereof
The present invention relates to colloidal photonic crystals using colloidal nanoparticles and a method for the preparation thereof, wherein by adding a viscoelastic material into a solution...
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7662900 |
Method for producing polyisobutene
The present invention relates to a process for preparing polyisobutene by polymerizing isobutene using an inert diluent and a halogen-containing Lewis acid as a catalyst, wherein the isobutene in...
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7645847 |
Process for preparing polyolefin products
A novel liquid phase polymerization process for preparing a polyolefin product having preselected properties is disclosed. The process includes the steps of providing a liquid feedstock which...
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7498396 |
Mid-range vinylidene content polyisobutylene polymer product produced by liquid phase polymerization process
A mid-range vinylidene content PIB polymer composition made by a liquid phase polymerization process conducted in a loop reactor at a temperature of at least 60° F. using a BF3/methanol catalyst ...
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7485764 |
Method for the production of polyisobutene
A process for the preparation of polyisobutene containing at least 75 mol % of terminal vinylidene groups, in which isobutene or an isobutene-containing hydrocarbon mixture is polymerized in the...
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7423100 |
Polymerization processes
The invention provides for polymerization processes to produce polymers utilizing boiling pool reactor systems and diluents including hydrofluorocarbons.
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7414101 |
Polymerization processes
The invention provides for a process to produce polymers utilizing a hydrofluorocarbon diluent.
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7411104 |
Method for producing polybutene
A method for producing high reactive polybutene (HRPB), in which carbon-carbon double bond is positioned at an end of polybutene, is disclosed. The high reactive polybutene having 300˜5000 of ...
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7402645 |
Soluble polyfunctional vinyl aromatic polymer and method of producing the same
The present invention relates to a soluble polyfunctional vinylaromatic copolymer improved in heat resistance, resistance to thermal decomposition, solvent solubility, and processability. The...
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7365152 |
Method for producing highly reactive, low halogen polyisobutenes
A process is described for preparing polyisobutene having a low halogen content, in which isobutene is polymerized in the presence of a catalyst which comprises a halogenated Lewis acid, the...
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7288614 |
Substituted cycloalkanes, and use thereof as cationic polymerization initiators
Substituted 7- to 12-membered cycloalkanes which have leaving groups, in particular chlorine atoms, on tertiary ring carbons, a process for preparing them and their use as initiators for cationic...
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7282548 |
Process for production of high-isoprene butyl rubber
The present invention relates to a continuous process for producing polymers at conversions ranging from 50% to 95% having a Mooney viscosity of at least 25 Mooney-units and a gel content of less...
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7244870 |
Method for producing polyisobutenes
Polyisobutenes in which at least 60 mol % of the polymer chains have at least one olefinically unsaturated terminal group are prepared by cationic polymerization of isobutene or...
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7217773 |
Method for producing polyisobutene
A process is described for preparing polyisobutene having a content of terminal vinylidene groups of at least 75 mol % by polymerizing isobutene or isobutenic hydrocarbon mixtures in the liquid...
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7132488 |
Method for producing homopolymers and copolymers of isobutene
In a process for the polymerization of isobutene or mixtures of isobutene with ethylenically unsaturated comonomers under the conditions of living cationic polymerization, the initiator system...
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7091293 |
Stereoregular polar vinyl polymers and methods of making the same
The polymerization of polar vinyl monomers in the presence of Lewis acids produces stereoregular vinyl polymers. Polar vinyl monomers may be mixed with Lewis acids to form associations or complexes...
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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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7049383 |
Polyisobutene composition
A polyisobutene composition having a global maximum of the differential molecular weight distribution curve at a molecular weight Mmax of from 3 500 to 8 000 is described, which comprises at least...
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7034085 |
Method for polymerizing ethylenically unsaturated monomers by degenerative iodine transfer
The invention pertains to a method for making a block or gradient final (co)polymer comprising a step of radically polymerizing a mixture of ethylenically unsaturated monomers in the presence of a)...
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7001966 |
Method for the production of isobutene polymers
The present invention relates to a process for preparing an isobutene polymer using a cyclopentene derivative as initiator and to the isobutene polymer obtainable by means of the process and to...
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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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6992155 |
Method for producing magnetic particle, magnetic particle and magnetic material
A method for producing a magnetic particle forming a magnetic material for absorbing electromagnetic waves comprises the steps of mixing an organometallic complex or a metal salt with a chain...
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6987165 |
Method for producing highly reactive polyisobutenes
A process for the preparation of highly reactive polyisobutenes is described, in which isobutene is polymerized in the presence of a complex of boron trifluoride and at least one cocatalyst in a...
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6946530 |
Process for the gas-phase (co-)polymerization of olefins in a fluidized bed reactor
The present invention relates to a process for the gas-phase (co-)polymerization of olefins in a fluidized bed reactor wherein fouling is prevented and/or flowability of polymer is improved thanks...
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6939943 |
Method for deactivating and recovering boron trifluoride when producing polyisobutenes
The invention relates to a method for deactivating and recovering boron trifluoride when producing polyisobutenes by means of cationic polymerization of isobutene or hydrocarbon streams containing...
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6939933 |
Process for polymerizing cationically polymerizable monomers
The invention relates to a new catalyst system that improves the heat transfer capability of a butyl reactor slurry process system in the production of random copolymers of one or more isoolefin...
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6867272 |
Aluminium compounds for producing vinylic polymers
An enolate functionalized reaction intermediate of general formula (I), wherein X is an alkyl group; Z is selected from the group consisting of alkyl, hydrogen, halogen, alkoxy, thiol, aryloxy or...
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6867267 |
Petroleum resins and their production with BF3 catalyst
Petroleum resins are produced using a supported BF3 cocatalyst complex. Preferably the cocatalyst is organic such as an alcohol or a carboxylic acid. Use of the catalyst in supported form together...
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6846903 |
Method for producing polyisobutylenes
Polyisobutenes are prepared by cationic polymerization of isobutene or isobutene-containing hydrocarbon streams in the liquid phase in the presence of boron trifluoride as a catalyst, the catalytic...
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6841641 |
Copolymers comprising low surface tension (meth) acrylates
The present invention is directed to a copolymer that includes a first radically polymerizable low surface tension (meth)acrylate monomer and one or more other radically polymerizable ethylenically...
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6825302 |
Process for synthesizing tackifier resin
This invention is based upon the unexpected discovery that the reactivity of the most important monomers commonly used in synthesizing tackifier resins with aluminum halide catalysts can be...
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6806336 |
Process for polymerizing ethylene, higher alpha-olefin comonomer and dienes, especially vinyl norbornene; polymers made using such processes; and articles made from such polymers
This invention relates to olefin polymerization processes for polymerizing ethylene, higher alpha-olefin comonomer and dienes, especially vinyl norbornene, and especially process for producing...
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6767980 |
Reactive diluent and curable resin composition
The present invention provides a reactive diluent composition which overcomes drawbacks of both the radical-cure and the cationic-cure reactive diluents and can be applied in a broad variety of...
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6710140 |
Method for producing polyisobutenes
A process for the preparation of polyisobutylenes by cationic polymerization of isobutylene or isobutylene-containing hydrocarbon streams in the liquid phase in the presence of boron trifluoride...
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6699950 |
Cationic polymerization process and catalyst system therefor
A process for producing a copolymer of an isoolefin and at least one other comonomer comprising the step of polymerizing a reaction mixture comprising an isoolefin, a catalyst and at least one of a...
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6683138 |
Process for producing high vinylidene polyisobutylene
A liquid phase polymerization process for preparing low molecular weight, highly reactive polyisobutylene. The process includes the steps of providing a feedstock containing isobutylene and a...
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6677418 |
Process for polymerization of cycloolefins and polymerizable cycloolefins
Process for the catalytic copolymerisation (ROMP) of strained activated cyclic olefins comprising contacting an activated strained mono (poly)cyclic olefin monomer of formula with at least 1 wt %...
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6646075 |
High molecular weight perfluorocyclobutane polymers and method of making
This invention relates to high molecular weight perfluorocyclobutane polymers and methods of polymerizing trifluorovinyl monomers to form high molecular weight perfluorocyclobutane polymers in the...
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6642329 |
Method for continuous production of polyisobutene
A process for the continuous preparation of polyisobutene having a number-average molecular weight {overscore (M)}N of from 500 to 50,000 and containing at least 50 mol % of terminal double bonds...
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6639032 |
Highly branched polymer from telomerization
A process for making hyperbranched polymers from An—Lz(XY)m type monomers wherein A is a polymerizable group moiety, XY is a telogen group moiety in which Y is a transferable atom or group which c...
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6620898 |
Production of polyisobutylene copolymers
The invention relates to a new improved catalyst to produce random copolymers of one or more iso-olefin monomers and one or more para-alkylstyrene monomers. The invention also relates to an...
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6608155 |
Metal halide solid acids and supported metal halides as catalysts for the preparation of hydrocarbon resins
Supported metal halides and metal halide solid acids are used as catalysts for the polymerization of a feed stream containing at least one of pure monomer, C5 monomers, and C9 monomers to produce...
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