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| Number | Title | Issue Date |
| 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 hydrocarbon having 3-12 carbon atoms, which contains 5 to 95 mass % of α-ol... | 01/11/2011 |
| 7332554 | Polymers with new sequence distributions The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers with new sequence distributions. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene,... | 02/19/2008 |
| 7332555 | Polymers with new sequence distributions The invention relates to new polymerization processes including diluents including hydrofluorocarbons and their use to produce novel polymers with new sequence distributions. In particular, the invention relates to copolymers of an isoolefin, preferably isobutylene,... | 02/19/2008 |
| 7256244 | Process for production of high-isoprene butyl rubber The present invention relates to a process for producing polymers comprising repeating units derived from at least one isoolefin monomer, at least one multiolefin monomer and optionally further copolymerization monomers in the presence of at least one organic nitro ... | 08/14/2007 |
| 7094823 | Composition and method for catalysis using bentonites Maghnia or Mostaganem bentonites, are activated by contacting the Maghnia or Mostaganem bentonite with an acid solution of selected concentration and then drying the Maghnia or Mostaganem bentonite to form an activated bentonite catalyst. This activated bentonite ca... | 08/22/2006 |
| 6936672 | Mold addition polymerization of norbornene-type monomers using group 10 metal complexes A catalyst system and a process for the bulk addition polymerization or of polycyclic olefins, such as norbornene, methylnorbornene, ethylnorbornene, butylnorbornene or hexylnorbornene, 1,2,3,4,4a,5,8,8a-octahydro-1,4:5,8-dimethanonapthalene, 5,5′-(1... | 08/30/2005 |
| 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 ester; n is an integer and is at least one; Y is alkyl or H; the tetra... | 03/15/2005 |
| 6831144 | Anionic polymerization process, and process for producing a polymer by the anionic polymerization process In anionic polymerization using an anionic polymerization initiator, a tertiary organoaluminum compound (A) having in the molecule thereof a chemical structure represented by a general formula: Al—O—Ar wherein Ar represents an aromatic ring, and at least one Lew... | 12/14/2004 |
| 6737493 | Biocompatible material To provide a biocompatible material with a high level of safety at a low cost. The biocompatible material has a polymer synthesized from monomers by an anionic polymerization, wherein the polymer has a ratio (Mw/Mn) of a weight-average molecular weight (Mw) to a num... | 05/18/2004 |
| 6689852 | Modifiers for improved olefin polymerization with activated neutral aluminum compounds The present invention is for a transition metal-free catalyst system for synthesizing high molecular weight, linear polymers. The system comprises a catalyst composition having: (a) a neutral compound having the formula AlR3, wherein R is an al... | 02/10/2004 |
| 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 ##STR1## with at least 1 wt % of an activated strained di (poly)cyclic olefin ... | 01/13/2004 |
| 6632897 | Use of nano-scaled metal oxide particles as polymerization catalysts Described is the use of nanoscale metal oxide particles as catalysts for the thermal and/or photochemical polymerization of species having at least one polymerizable carbon-carbon multiple bond and/or at least one carbon containing ring capable of undergo... | 10/14/2003 |
| 6630553 | Process for the preparation of butyl rubber utilizing alkylaluminum dihalides and aluminoxanes A process for preparing a butyl polymer, the process comprising contacting a C4 to C8 monoolefin monomer with a C4 to C14 multiolefin monomer at a temperature in the range of from about -100° C. to about +50° ... | 10/07/2003 |
| 6596825 | Low gel high cis polydiene The present invention is directed to a process for forming a high-cis polydiene. The process includes catalyzing a diene polymerization, and terminating the polymerization with an amine-water termination mixture, preferably a TMEDA-water termination mixtu... | 07/22/2003 |
| 6562915 | Method for carrying out radical ethylene high-pressure polymerization while preventing undesired polymer deposits In a process for the polymerization or copolymerization of ethylenically unsaturated monomers in the presence of polymerization initiators which decompose to form free radicals in a continuously operated polymerization apparatus comprising a fresh gas fee... | 05/13/2003 |
| 6555637 | Anionic polymerization process, and process for producing a polymer by the anionic polymerization process In anionic polymerization using an anionic polymerization initiator, a tertiary organoaluminum compound (A) having in the molecule thereof a chemical structure represented by a general formula: Al--O--Ar wherein Ar represents an aromatic ring, and at leas... | 04/29/2003 |
| 6403747 | Process for preparation of butyl rubber using activated alkylaluminum halides A process for preparing a butyl polymer having a weight average molecular weight of at least about 400,000. The process comprises the step of contacting a C4 to C8 monoolefin monomers with a C4 to C14 multiolefi... | 06/11/2002 |
| 6403743 | Petroleum resins and their production with supported catalyst Petroleum resins are produced by using a supported halide based Lewis acid polymerization catalyst wherein the Lewis acid is chemically bound to the support and free hydrogen halide and/or alkane formed by the reaction of the Lewis acid with the support h... | 06/11/2002 |
| 6358876 | Organo-aluminum compounds immobilized on organopolysiloxane microgel particles The invention relates to particles comprises of organopolysiloxane microgel particles having a diameter of 5 to 200 nm and organo-aluminum compounds immobilized thereon. The particles can be used as cocatalysts together with metal compounds of the 4, 5, 6... | 03/19/2002 |
| 6310154 | Solid acids as catalysts for the preparation of hydrocarbon resins 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 hydrocarbon resins. Freely-associated water may be removed from the solid acid catalyst prior to use... | 10/30/2001 |
| 6281309 | Flourinated solid acids as catalysts for the preparation of hydrocarbon resins Fluorinated solid acids and supported fluorinated 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 hydrocarbon resins. Freely-associated water may be... | 08/28/2001 |
| 6156859 | Process for producing highly branched polyisoolefins Highly branched polyisoolefines are produced according to the invention by the polymerization of isoolefines in a single-stage process, in solution, suspension or in the gas phase in the presence of bifunctional monomers which contain at least one group c... | 12/05/2000 |
| 6121392 | Low softening point beta-pinene-based resins with improved molecular weight distribution The specification discloses a method for producing low softening point beta-pinene based polyterpene resins having an essentially unimodal molecular weight distribution, as well as resins made by the method. In the process a beta-pinene monomer is reacted... | 09/19/2000 |
| 6080819 | Blends of olefin polymers and syndiotactic vinyl polymers Blends of olefin polymers and syndiotactic vinyl polymers are produced by the catalytic polymerization of olefins and aromatic vinyl compounds or methacrylate esters as vinyl compounds in inert diluents in the presence of a catalyst mixture of transition ... | 06/27/2000 |
| 6031058 | Addition polymers of polycycloolefins containing silyl functional groups Silyl substituted polymers of polycycloolefins are provided as well as catalyst systems for their preparation. The polymers of the invention include polycyclic repeat units that contain pendant silyl functional groups represented by the following formulae... | 02/29/2000 |
| 5869587 | Process for the polymerization of alpha olefins using a new aluminophosphate support Novel catalysts are provided for the polymerization of olefins such as ethylene. These catalysts comprise a novel amorphous aluminophosphate comprising, on a microlevel, sheets of aluminophosphate as well as spheres of aluminophosphate plus a chromium com... | 02/09/1999 |
| 5780563 | Supported lewis acid catalysts derived from superacids useful for hydrocarbon conversion reactions A supported Lewis acid catalyst system for catalyzing hydrocarbon conversion reactions including cationic polymerization, alkylation, isomerization and cracking reactions is disclosed, wherein the catalyst system comprises an inorganic oxide support havin... | 07/14/1998 |
| 5744557 | Energy-curable cyanate/ethylenically unsaturated compositions A composition of matter including a polymerizable mixture comprising 1 to 99 weight percent of a first monomer and an initiator therefor, the first monomer being one of 1) at least one free-radically polymerizable monomer or 2) at least one cyanate ester ... | 04/28/1998 |
| 5744560 | Metal accelerated polymerization processes A free radical polymerization process for the preparation of a polymer comprising heating a mixture of a free radical initiator, a stable free radical agent, a metal catalyst, or a metal stable free radical complex catalyst, and at least one polymerizable... | 04/28/1998 |
| 5703183 | Carbocationic catalysts and process for using said catalysts A carbocationic catalyst composition comprising an initiator of water, a tertiary alkyl or aralkyl halide, ester, ether, carboxylic acid, acid halide or a polymeric halide, a co-initiator of organometal alkoxide halides, organometal phenoxide halides and/... | 12/30/1997 |
| 5698758 | Aluminum phosphate composition with high pore volume and large pore diameter, process for its production and use thereof A homogeneous amorphous aluminum phosphate composition with a surface area of 100 to 300 m2 /g and a pore volume in pores with diameters of less than 1000 nm of at least 1.0 cm3 /g, in which phosphorus and aluminum are present in a m... | 12/16/1997 |
| 5616661 | Process for controlling particle growth during production of sticky polymers A process for controlling the particle growth of a polymer in a gas phase polymerization reaction by using an inert particulate material and an unsupported liquid polymerization catalyst.... | 04/01/1997 |
| 5418303 | Carbocationic catalysts and process for using said catalysts A carbocationic catalyst composition comprising an initiator of water, a tertiary alkyl or aralkyl halide, ester, ether, carboxylic acid, acid halide or a polymeric halide and a co-initiator of an alkoxy metal halide, is used to produce narrow molecular w... | 05/23/1995 |
| 5416176 | Method for controlling the feed composition to a process for polymerizing isobutylene A process for processing a cracked feed stream so as to provide a feed stream, having a requisite concentration of isobutylene and butene-1, to a polymerization unit for polymerization of isobutylene.... | 05/16/1995 |
| 5350726 | Carbocationic catalysts and process for using said catalysts A carbocationic catalyst composition comprising an initiator of water, a tertiary alkyl or aralkyl halide, ester, ether, carboxylic acid, acid halide or a polymeric halide and a co-initiator of an alkoxy metal halide, is used to produce narrow molecular w... | 09/27/1994 |
| 5283300 | Process for preparing polyolefin fluff using metallocene catalyst Olefin polymers and copolymers having controlled morphology are prepared by bulk or slurry polymerization using metallocene catalysts in the presence of an alumoxane cocatalyst. Prepolymerization at a temperature of -10° C. to +35° C. during 1.5 to 3.5 ... | 02/01/1994 |
| 5245084 | Mixture suited for crosslinking polymers and process for crosslinking polymers with extension of scorch time The mixture consists of at least one organic peroxide, at least one hydroquinone derivative of the general formulae I and/or II and/or III ##STR1## wherein R and R1, which may be identical or different, stand for H or t-alkyl, and X stands... | 09/14/1993 |
| 5179181 | Process for producing fluorine-containing copolymer and fluorine-containing copolymer composition According to the present invention, there is provided an improvement of a process for producing fluorine-containing copolymers comprising copolymerizing (a) a chlorinated fluoroolefin, (b) vinyl ether, and (c) an organosilicon compound having an olefinically u... | 01/12/1993 |
| 5155191 | Preparation process of granular polymers By dispersing and polymerizing at least one N-alkyl-or N-alkylene-substituted (meth)acrylamide or a mixture of at least one N-alkyl- or N-alkylene-substituted (meth)acrylamide and other copolymerizable monomer is an aqueous inorganic salt solution having ... | 10/13/1992 |
| 5096936 | Photo-crosslinkable resin composition The invention provides a photo-crosslinkable resin composition consisting essentially of an acrylic resin having alicyclic epoxy groups and a photo cationic polymerization initiator.... | 03/17/1992 |
