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8815971 Control over controlled radical polymerization processes  
A procedure for improved temperature control in controlled radical polymerization processes is disclosed. The procedure is directed at controlling the concentration of the persistent radical in...
8791216 Activated inorganic metal oxides  
A catalyst system for heterogeneous catalysis of organic compound conversion reactions is disclosed. The system includes a reaction product of (i) a BF3/alcohol catalyst complex and (ii) an...
8765895 Crosslinked polyolefins for biomedical applications and method of making same  
The invention relates to a polymer composition that includes a branched alkene which is cationically polymerizable as well as a glass-forming comonomer and/or a vinyl comonomer containing...
8637619 Process for preparing high-reactivity isobutene homo- or copolymers  
Preparation of high-reactivity isobutene homo- or copolymers with a content of terminal vinylidene double bonds per polyisobutene chain end of at least 50 mol % and a polydispersity of preferably...
8613298 Functionalized elastomers  
The present invention is directed to a method of preparing a functionalized elastomer, comprising the steps of A) obtaining a diene-based elastomer;B) mixing the diene-based elastomer with a...
8569427 Polymers derived from rosin and their methods of preparation  
Methods of forming polymer material from rosin-derived material are provided. For example, a plurality of functionalized resin acids having a polymerizable functional group via controlled living...
8541524 Free-radical polymerization process in aqueous dispersion for the preparation of a block copolymer at least one block of which is a block of a halogenated polymer  
Process of controlled free-radical polymerization in aqueous dispersion for the preparation of a block copolymer at least one block of which is a block of a halogenated polymer using molecular...
8524843 Production of highly reactive low molecular weight PIB oligomers  
In an embodiment, the present invention provides a process for the liquid phase polymerization of isobutylene to manufacture highly reactive PIB oligomers having Mn under 1000, using a catalyst...
8445580 Tire with tread of polybutadiene rubber  
Pneumatic rubber tire intended for heavy duty service having a cap/base configured tread with a silica-containing specialized cis 1,4-polybutadiene rubber-rich tread cap rubber layer.
8349977 Process for preparing high-reactivity isobutene homo- or copolymers  
Preparation of high-reactivity isobutene homo- or copolymers with a content of terminal vinylidene double bonds per polyisobutene chain end of at least 50 mol % and a polydispersity of preferably...
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...
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...
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. ...
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...
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...
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...
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...
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...
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...
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...
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...
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 ...
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...
7423100 Polymerization processes  
The invention provides for polymerization processes to produce polymers utilizing boiling pool reactor systems and diluents including hydrofluorocarbons.
7414101 Polymerization processes  
The invention provides for a process to produce polymers utilizing a hydrofluorocarbon diluent.
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 ...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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)...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...
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...