Isobutylene Patents (Class 526/348.7)
-
Patent number: 7049383Abstract: 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 one local maximum at a molecular weight of from 112 to 560. The isobutene oligomers present act as flow improvers and boiling assistants. They are added to higher molecular weight isobutene polymers, preferably before or in the course of a distillation, for removing unconverted isobutene and/or an inert diluent.Type: GrantFiled: July 2, 2002Date of Patent: May 23, 2006Assignee: BASF AktiengesellschaftInventors: Heinz Auer, Dirk Borchers, Thomas Wettling
-
Patent number: 7041760Abstract: The present invention relates to a process for producing polymers containing repeating units derived from at least one isoolefin monomer, optionally repeating units derived from at least one multiolefin monomer and optionally further copolymerizable monomers in the presence of a zinc compound and optionally an organic halide activator.Type: GrantFiled: August 31, 2004Date of Patent: May 9, 2006Assignee: Bayer Inc.Inventors: Manfred Bochmann, Shaun Garratt
-
Patent number: 7037999Abstract: A relatively low molecular weight, mid-range vinylidene content PIB polymer product and a process for making the same. At least about 90% of the PIB molecules present in the product comprise alpha or beta position isomers. The vinylidene (alpha) isomer content of the product may range from 20% to 70% thereof and the content of tetra-substituted internal double bonds is very low, preferably less than about 5% and ideally less than about 1–2%. The midrange vinylidene content PIB polymer products are prepared by a liquid phase polymerization process conducted in a loop reactor at a temperature of at least 60° F. using a BF3/methanol catalyst complex and a contact time of no more than 4 minutes.Type: GrantFiled: March 19, 2002Date of Patent: May 2, 2006Assignee: Texas Petrochemicals LPInventors: C. Edward Baxter, Jr., Christopher Lobue, Gilbert Valdez, Daniel Herndon, Timothy Lowry
-
Patent number: 7001966Abstract: 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 particular functionalization products thereof.Type: GrantFiled: February 27, 2003Date of Patent: February 21, 2006Assignee: BASF AktiengesellschaftInventors: Gabriele Lang, Arno Lange, Hans Peter Rath, Helmut Mach
-
Patent number: 7001967Abstract: A transparent heat-resistant resin optical materials having excellent heat resistance and dynamic characteristics, having negative birefringence and exhibiting a high refractive index and a high Abbe number, especially optical compensating members such as films, sheets and retardation films for LCD display element. The transparent heat-resistant resin optical material is made of a copolymer containing a specific olefin residue unit and a specific N-phenyl-substituted maleimide residue unit and having a weight average molecular weight, as reduced into standard polystyrene, of from 5×103 to 5×106, the transparent heat-resistant resin optical material exhibiting negative birefringence; and a retardation film having a relationship of three-dimensional refractive indexes of nz?ny>nx, nz>ny?nx, or nz>nx?ny.Type: GrantFiled: September 17, 2003Date of Patent: February 21, 2006Assignee: Tosoh CorporationInventors: Shinsuke Toyomasu, Yojiro Ikai
-
Patent number: 6992152Abstract: 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 polyolefin product outlet connection. Each reactor is equipped with a recirculation system including a pump arranged to circulate a reaction mixture through the tube side of the reactor independently of the introduction of olefin polymerization reaction mixture into the reactor. The apparatus may also include an inlet reaction mixture distribution manifold and an outlet polymerization reaction mixture collection manifold interconnecting the reactors for operation in parallel. The apparatus also includes catalyst composition and catalyst modifier inlets for each reactor arranged such that a catalyst modifier to may be introduced into each reactor at a rate which is independent of the introduction of catalyst composition.Type: GrantFiled: August 19, 2004Date of Patent: January 31, 2006Assignee: Texas Petrochemicals LPInventors: Christopher Lobue, Gilbert Valdez, Daniel Herndon, C. Edward Baxter, Jr., Russell E. Reid, Sr.
-
Patent number: 6956094Abstract: The invention provides for polymerization catalyst compositions, and for methods for introducing the catalyst compositions into a polymerization reactor. More particularly, the method combines a catalyst component containing slurry and a catalyst component containing solution to form the completed catalyst composition for introduction into the polymerization reactor. The invention is also directed to methods of preparing the catalyst component slurry, the catalyst component solution and the catalyst compositions, to methods of controlling the properties of polymer products utilizing the catalyst compositions, and to polymers produced therefrom.Type: GrantFiled: February 5, 2004Date of Patent: October 18, 2005Assignee: Univation Technologies, LLCInventors: Simon Mawson, Sun-Chueh Kao, Tae Hoon Kwalk, Timothy Roger Lynn, David H. McConville, Matthew Gary McKee, John Francis Szul, Kersten Anne Terry, Timothy T. Wenzel, Mark Gregory Goode, John Henry Oskam, Robert J. Jorgensen, Robert Harold Vogel
-
Patent number: 6939933Abstract: 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 monomers and one or more conjugated diene monomers in continuous slurry polymerization processes. The process is carried out in an anhydrous polymerization system containing a mixture of the monomers in a polar diluent along with a Lewis acid and a C5 or greater initiator having a tertiary halide.Type: GrantFiled: February 14, 2001Date of Patent: September 6, 2005Assignee: ExxonMobil Chemical Patents Inc.Inventors: Robert N. Webb, David Y. Chung, Andrew B. Donnalley, Michael F. McDonald, Kenneth W. Powers, Ralph Howard Schatz
-
Patent number: 6936670Abstract: The instant invention relates to multifunctional alkoxyamines based on polyalkylpiperidines, polyalkylpiperazinones and polyalkylmorpholinones and their use as polymerization regulatros/initiators. Further subjects of the invention are a polymerizable composition comprising an ethylenically unsaturated monomer or oligomer and the alkoxyamine compound as well as a process for polymerization and a process for preparation of the compounds.Type: GrantFiled: June 27, 2002Date of Patent: August 30, 2005Assignee: Ciba Specialty Chemical Corp.Inventors: Andreas Kramer, Andreas Mühlebach, Peter Nesvadba, Marie-Odile Zink, Tobias Hintermann
-
Patent number: 6930151Abstract: Block copolymers and star polymers having copolymer arms of PIB-PAN have been synthesized via living carbocationic polymerization and atom transfer radical polymerization in a methylene chloride/cyclohexanone solvent system.Type: GrantFiled: April 3, 2003Date of Patent: August 16, 2005Assignee: University of AkronInventors: Joseph P. Kennedy, Zheng Fang, Ahmed F. Moustafa
-
Patent number: 6900280Abstract: The invention relates to a composition comprising: a) an acid monomer or oligomer of acrylic acid or of an acid derivative of acrylic acid or mixtures thereof; or a mixture of an ethylenically unsaturated monomer or oligomer and an acid monomer or oligomer of acrylic acid or of an acid derivative of acrylic acid; b) at least one radical initiator which forms a radical upon heating or upon irradiation with (UV) light in the range from 305 nm to 450 nm; and c) a compound of the formulae (I), (Ib) or (Ic) wherein Y represents a group that activates nucleophilic addition reactions at the adjacent double bond; X represents halogen or the anion of an aliphatic or aromatic monocarboxylic or dicarboxylic acid of 1-12 carbon atoms, of a monovalent or divalent oxo acid or of a complex acid; n represents 0 or 1; R1, R2, R3 independently of one another represent hydrogen, C1-C18alkyl, C3-C18alkyl interrupted by at least one nitrogen or oxygen atom, C3-C18alkenyl, C3-C18alkynyl, C7-C9phenylalkyl, C3-C12 cycloalkyl and C3-Type: GrantFiled: February 21, 2002Date of Patent: May 31, 2005Assignee: CIBA Specialty Chemicals Corp.Inventor: Peter Murer
-
Patent number: 6884855Abstract: Sulfurized olefin compositions and components are prepared from sulfurizing high methylvinylidene polyisobutylene(s) having at least 25% methylvinylidene and a number average molecular weight in the range of about 120 to about 600, at suitable temperatures and pressures. The resulting sulfurized reaction product and polyisobutyl-1,2-dithiole-4-cyclopentene-3-thione compounds and derivatives are useful in lubricating oils.Type: GrantFiled: January 30, 2003Date of Patent: April 26, 2005Assignee: Chevron Oronite Company LLCInventors: Kenneth D. Nelson, Frank Plavac
-
Patent number: 6884858Abstract: 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 contains an olefinic component and a catalyst composition consisting of a stable complex of BF3 and a complexing agent therefor. The feedstock may comprise any one or more of a number of olefins including branched olefins such as isobutylene, C3 to C15 linear alpha olefins and C4 to C15 reactive non-alpha olefins. The feedstock and the catalyst composition are introduced into a residual reaction mixture recirculating in a loop reactor reaction zone provided in the tube side of a shell and tube heat exchanger at a recirculation rate sufficient to cause intimate intermixing of the residual reaction mixture, the added feedstock and the added catalyst composition.Type: GrantFiled: July 30, 2002Date of Patent: April 26, 2005Assignee: Texas Petrochemicals LPInventors: C. Edward Baxter, Jr., Gilbert Valdez, Christopher Lobue, Timothy Lowry, Armen Abazajian
-
Patent number: 6858690Abstract: 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 isobutylene-based polymers in continuous slurry polymerization processes. The process is carried out in an anhydrous polymerization system containing a mixture of the monomers in a polar diluent along with a Lewis acid and a C5 or greater initiator having a tertiary halide.Type: GrantFiled: July 25, 2003Date of Patent: February 22, 2005Assignee: ExxonMobil Chemical Patents Inc.Inventors: Robert Norman Webb, Michael Francis McDonald, David Yen-Lung Chung, Yuan-Ju Chen, Richard Dwight Hembree, John Patrick Soisson
-
Patent number: 6858681Abstract: The process for producing an olefinic polymer comprises introducing a saturated aliphatic hydrocarbon in a liquid phase state and in a vapor phase state into the aforementioned fluidized-bed and (co)polymerizing in the condition that when the inside radius of the cylinder section of the fluidized-bed reactor is defined as a distance of 1, the relationship between the concentration (C1) of the saturated aliphatic hydrocarbon put in a liquid state in the peripheral portion of the cylinder section at a relative distance of 0.7 to 1.0 from the center of the cylinder section as a start point and the concentration (C2) of the saturated aliphatic hydrocarbon put in a liquid state in the center portion of the cylinder section at a relative distance less than 0.7 from the center fulfills the following equation: C1>C2 at a place close to the upstream section of said gas distributing plate.Type: GrantFiled: March 28, 2003Date of Patent: February 22, 2005Assignee: Mitsui Chemicals, Inc.Inventors: Satoru Ohtani, Shinji Abe, Hiroto Nishida
-
Patent number: 6852804Abstract: Block copolymers having a polyisobutylene segment and a polycycloaliphatic diene polymer segment are presented. Star block copolymers with 2 to 16 block copolymer arms, wherein each of the arms has a polyisobutylene segment and a polycycloaliphatic diene polymer segment, are presented. The star block copolymers are synthesized via the “core first” method.Type: GrantFiled: April 25, 2003Date of Patent: February 8, 2005Assignee: The University of AkronInventors: Joseph P. Kennedy, Ralf M. Peetz, Ahmed F. Moustafa
-
Patent number: 6852808Abstract: Homo- and copolymers of isobutene are prepared by continuous cationic polymerization of isobutene or mixtures of isobutene with ethylenically unsaturated comonomers in the presence of an initiator system comprising: i) a Lewis acid selected from covalent metal-halogen compounds and covalent semimetal-halogen compounds and ii) at least one aprotic organic compound I having at least one functional group FG which forms a carbocation or a cationic complex with the Lewis acid under polymerization conditions in an organic solvent inert with respect to the Lewis acid, by a process in which the polymerization is carried out in a tubular flow-through reactor which has a plurality of curves having an alternating direction of curvature.Type: GrantFiled: May 24, 2002Date of Patent: February 8, 2005Assignee: BASF AktiengesellschaftInventors: Stephan Hüffer, Hans Peter Rath, Gabriele Lang, Jens Kremeskötter, Elmar Stöckelmann
-
Patent number: 6846885Abstract: The present invention provides a novel process for the preparation of isoolefin copolymers in the presence of zirconium halides or hafnium halides or mixtures thereof and organic nitro compounds, especially for the preparation of butyl rubbers, as well as isoolefin copolymers composed of isobutene, isoprene and, optionally, further monomers.Type: GrantFiled: March 21, 2003Date of Patent: January 25, 2005Assignee: Bayer AktiengesellschaftInventors: Gerhard Langstein, Martin Bohnenpoll
-
Patent number: 6844405Abstract: The present invention pertains to a process for controlled free radical polymerization or copolymerization of vinyl chloride at a temperature between 40° C. and 95° C., at a pressure between 5 and 30 bar in the presence of a stable free nitroxyl radical.Type: GrantFiled: November 6, 2001Date of Patent: January 18, 2005Assignee: Ciba Specialty Chemicals CorporationInventors: Rudolf Pfaendner, Thomas Wannemacher, Dietrich Braun
-
Publication number: 20040254312Abstract: The invention provides for polymerization catalyst compositions, and for methods for introducing the catalyst compositions into a polymerization reactor. More particularly, the method combines a catalyst component containing slurry and a catalyst component containing solution to form the completed catalyst composition for introduction into the polymerization reactor. The invention is also directed to methods of preparing the catalyst component slurry, the catalyst component solution and the catalyst compositions, to methods of controlling the properties of polymer products utilizing the catalyst compositions, and to polymers produced therefrom.Type: ApplicationFiled: February 5, 2004Publication date: December 16, 2004Inventors: Simon Mawson, Sun-Chueh Kao, Tae Hoon Kwalk, Timothy Roger Lynn, David H. McConville, Matthew Gary McKee, John Francis Szul, Kersten Anne Terry, Timothy T. Wenzel, Mark Gregory Goode, John Henry Oskam, Robert J. Jorgensen, Robert Harold Vogel
-
Publication number: 20040225087Abstract: Apparatus for olefin polymerization includes a plurality of shell and tube olefin polymerization reactors, each of which has an olefin polymerization reaction mixture inlet connection and a crude polyolefin product outlet connection. Each reactor is equipped with a recirculation system including a pump arranged to circulate a reaction mixture through the tube side of the reactor independently of the introduction of olefin polymerization reaction mixture into the reactor. The apparatus also includes an inlet reaction mixture distribution manifold and an outlet polymerization reaction mixture collection manifold interconnecting the reactors for operation in parallel. The apparatus also includes catalyst composition and catalyst modifier inlets for each reactor arranged such that a catalyst modifier to may be introduced into each reactor at a rate which is independent of the introduction of catalyst composition.Type: ApplicationFiled: May 9, 2003Publication date: November 11, 2004Inventors: C. Edward Baxter, Daniel Herndon, James G. Wakeland, Russel E. Reid, Gilbert Valdez
-
Publication number: 20040214951Abstract: Block copolymers having a polyisobutylene segment and a polycycloaliphatic diene polymer segment are presented. Star block copolymers with 2 to 16 block copolymer arms, wherein each of the arms has a polyisobutylene segment and a polycycloaliphatic diene polymer segment, are presented. The star block copolymers are synthesized via the “core first” method.Type: ApplicationFiled: April 25, 2003Publication date: October 28, 2004Inventors: Joseph P. Kennedy, Ralf M. Peetz, Ahmed F. Moustafa
-
Publication number: 20040198937Abstract: 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 one local maximum at a molecular weight of from 112 to 560. The isobutene oligomers present act as flow improvers and boiling assistants. They are added to higher molecular weight isobutene polymers, preferably before or in the course of a distillation, for removing unconverted isobutene and/or an inert diluent.Type: ApplicationFiled: January 5, 2004Publication date: October 7, 2004Inventors: Heinz Auer, Dirk Borchers, Thomas Wettling
-
Patent number: 6800704Abstract: The invention comprises an olefin polymerization process comprising contacting ethylene alone or with one or more olefinically unsaturated comonomers with a Group 3-6 metallocene catalyst compound comprising one &pgr;-bonded ring having a C3 or greater hydrocarbyl, hydrocarbylsilyl or hydrocarbylgermyl substituent said substituent bonded to the ring through a primary carbon atom; and, where the compound contains two &pgr;-bonded rings, the total number of substituents on the rings is equal to a number from 3 to 10, said rings being asymmetrically substituted where the number of substituents is 3 or 4. The invention process is particularly suitable for preparing ethylene copolymers having an MIR less than about 35, while retaining narrow CD even at high comonomer incorporation rates, and with certain embodiments providing ethylene copolymers having improved melt strength with the low MIR.Type: GrantFiled: April 22, 2002Date of Patent: October 5, 2004Assignee: ExxonMobil Chemical Patents Inc.Inventors: Joseph C. Floyd, Moses Olukayode Jejelowo, Donna Jean Crowther, George Alan Vaughan, Ching Tai Lue
-
Publication number: 20040192865Abstract: This invention is related to extruded pipe resins comprising polyethylene.Type: ApplicationFiled: February 23, 2004Publication date: September 30, 2004Inventors: Scott T. Roger, Thomas W. Towles, Anthony N. Speca, Stanley J. Katzen
-
Publication number: 20040176558Abstract: A copolymer composition that includes a copolymer comprised of at least 30 mol % of residues having the following alternating residues from a donor monomer and from an acceptor monomer. The copolymer contains at least 15 mol % of an isobutylene type donor monomer and at least 15 mol % of an acrylic monomer as an acceptor monomer. The copolymer is substantially free of maleate or fumarate monomer segments and the copolymer composition is substantially free of Lewis acids and transition metals. Also disclosed is a thermosetting composition that includes a reactant comprising functional groups, a crosslinking agent having at least two functional groups that are reactive with the functional groups first reactant, and a copolymer flow control agent that includes the copolymer composition as well as substrates coated with the thermosetting composition.Type: ApplicationFiled: October 30, 2003Publication date: September 9, 2004Inventors: Simion Coca, Edward R. Coleridge, Gregory J. McCollum, James B. O'Dwyer, James E. Poole, Victoria A. Trettel
-
Publication number: 20040176552Abstract: 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 temperature of at least 60° F. using a BF3/methanol catalyst complex and a contact time of no more than 4 minutes. At least about 90% of the PIB molecules present in the product comprise alpha or beta position isomers. The vinylidene (alpha) isomer content of the product may range from 20% to 70% thereof, and the content of tetra-substituted internal double bonds is very low, advantageously no more than about 10%, preferably less than about 5% and ideally less than about 1-2%.Type: ApplicationFiled: March 18, 2004Publication date: September 9, 2004Applicant: Texas Petrochemicals LPInventor: C. Edward Baxter
-
Publication number: 20040171772Abstract: Homo- and copolymers of isobutene are prepared by continuous cationic polymerization of isobutene or mixtures of isobutene with ethylenically unsaturated comonomers in the presence of an initiator system comprising:Type: ApplicationFiled: November 5, 2003Publication date: September 2, 2004Inventors: Stephan Huffer, Hans Peter Rath, Gabriele Lang, Jens Kremeskotter, Elmar Stockelmann
-
Publication number: 20040171778Abstract: Low color, aromatic modified C5 hydrocarbon resins are disclosed. The resins are predominantly an aromatic modified piperylene resin. The resins are useful as tackifies in hot melt adhesives and hot melt pressure sensitive adhesives.Type: ApplicationFiled: November 13, 2002Publication date: September 2, 2004Inventors: Chretien Pieter Louis C. Donker, Elisabeth E.C.G. Gielens, Gerard A. Verrijzer
-
Publication number: 20040167303Abstract: The instant invention relates to multifunctional alkoxyamines based on polyalkylpiperidines, polyalkylpiperazinones and polyalkylmorpholinones and their use as polymerization regulatros/initiators. Further subjects of the invention are a polymerizable composition comprising an ethylenically unsaturated monomer or oligomer and the alkoxyamine compound as well as a process for polymerization and a process for preparation of the compounds.Type: ApplicationFiled: December 30, 2003Publication date: August 26, 2004Inventors: Andreas Kramer, Andreas Muhlebach, Peter Nesvadba, Marie-Odile Zink, Tobias Hintermann
-
Publication number: 20040147391Abstract: Copolymerization of Ni(II) phenol imine complexes containing olefinic substituents on aryl groups with styrene in the presence of a radical initiator results in polymerized late transition metal catalysts which can be used for olefin polymerization or oligomerization. These catalysts have high catalyst activity for olefin polymerization or oligomerization.Type: ApplicationFiled: October 24, 2003Publication date: July 29, 2004Inventors: Stanley Wai-Yan Chow, Guo-Xin Jin, Zerong Lin, Robert J. Wittenbrink, Dao Zhang
-
Publication number: 20040138393Abstract: The present invention pertains to a process for controlled free radical polymerization or copolymerization of vinyl chloride at a temperature between 40° C. and 95° C., at a pressure between 5 and 30 bar in the presence of a stable free nitroxyl radical.Type: ApplicationFiled: May 8, 2003Publication date: July 15, 2004Inventors: Rudolf Pfaendner, Thomas Wannemacher, Dietrich Braun
-
Publication number: 20040132944Abstract: The present invention is relates to a process for the preparation of an isoolefin polymer containing repeating units derived from at least one isoolefin, at least one divinyl aromatic monomer and, optionally, additional copolymerizable monomers, wherein the content of unreacted vinyl groups from the aromatic monomer is predicted by means of FTIR measurements.Type: ApplicationFiled: October 21, 2003Publication date: July 8, 2004Inventors: Dave Syme, Adam Gronowski, Gabor Kaszas, Kenneth Norman Watson
-
Patent number: 6753387Abstract: Methods for controlling the temperature of an olefin polymerization reactor (e.g., a polyethylene reactor) system are disclosed herein. The olefin polymerization reactor system includes a polymerization reactor and a cooling jacket in thermal contact with the reactor. An aqueous froth is present in the jacket, and the pressure therein is maintained below atmospheric pressure. Control of the pressure in the jacket controls the boiling temperature of the jacket fluid, and thus, controls the rate of heat transfer from the reactor to the fluid in the jacket. This provides an efficient and simple means for controlling the reactor temperature.Type: GrantFiled: March 19, 2003Date of Patent: June 22, 2004Assignee: Chevron Phillips Chemical Company LPInventors: John H. Tait, Rajinder Sharma, James E. Hein, Gary A. Marek
-
Patent number: 6753389Abstract: Polyisobutene is prepared by cationic polymerization of isobutene and/or isobutene-containing hydrocarbons in the liquid phase in the presence of a complex of BF3 and at least one cocatalyst which is preferably chosen from oxygen-containing compounds, the BF3/cocatalyst complex being produced in situ by adding BF3 and cocatalyst to a reaction stream, wherein BF3 and oxygen-containing cocatalyst are added to the reaction stream via a common binary nozzle comprising an outlet for BF3 and an outlet for the oxygen-containing cocatalyst. The invention also describes a binary nozzle having a centrally arranged outlet for the catalyst.Type: GrantFiled: March 19, 2002Date of Patent: June 22, 2004Assignee: BASF AktiengesellschaftInventors: Hans Peter Rath, Dieter Hahn, Gerhard Sandrock, Frans van Deyck, Bart Vander Straeten, Eddy De Vree
-
Patent number: 6750267Abstract: Disclosed herein are radiation-curable polymers, a method of preparing radiation-curable polymers and compositions containing radiation-curable polymers. Radiation-curable polymers and compositions containing radiation-curable polymers are useful as coatings and adhesives.Type: GrantFiled: December 24, 2001Date of Patent: June 15, 2004Assignees: University of Massachusetts Lowell, Dow Corning CorporationInventors: Rudolf Faust, Savvas Hadjikyriacou, Toshio Suzuki, Maneesh Bahadur
-
Patent number: 6730739Abstract: An improved cling film includes a PIB tackifier that is essentially a homopolymer of isobutylene wherein the double bonds are mainly in the alpha position. A method for improving the cling properties of a cling film includes providing a cling film base structure and including in the base structure such a PIB tackifier.Type: GrantFiled: May 23, 2002Date of Patent: May 4, 2004Assignee: Texas Petrochemicals LPInventor: Betty L. Gipson
-
Patent number: 6727322Abstract: The present invention provides high mechanical strength amphiphilic polymeric networks and implantable biological devices made therefrom that are capable of encasing and, thus, immunoisolating biological material from an immunological response of a host individual. The present invention also provides methods for making the amphiphilic networks and implantable biological devices. The present invention also provides a method for the treatment of type I diabetes mellitus comprising the steps of encasing a sufficient amount of islet of Langerhans cells within said biological device, wherein said biological device is capable of immunoisolating said encased islet cells upon implantation into an individual; implanting said biological device into a diabetic host individual; allowing said implanted biological device to remain implanted in said diabetic individual for a time sufficient to normalize the blood glucose level in said diabetic individual.Type: GrantFiled: April 1, 2002Date of Patent: April 27, 2004Assignee: The University of AkronInventors: Joseph P. Kennedy, Irada S. Isayeva
-
Patent number: 6710140Abstract: 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 acting as catalyst, the catalytic activity of boron trifluoride being partially or completely stopped by means of a solid deactivator following a given timelapse, which deactivator is an inorganic, anhydrous or hydrous oxygen compound of aluminum which is insoluble in the reaction mixture.Type: GrantFiled: February 19, 2003Date of Patent: March 23, 2004Assignee: BASF AktiengesellschaftInventors: Thomas Wettling, Dirk Borchers, Wim Verrelst, Hans Peter Rath
-
Patent number: 6710146Abstract: The present invention relates to a polymerizable composition comprising a) at least one ethylenically unsaturated monomer and b1) at least one multifunctional triazinyl based 2,2,6,6 tetramethylpiperidine-1-oxyl and a free radical initiator or b2) at least one multifunctional triazinyl based 2,2,6,6 tetramethylpiperidine-1-oxyl-ether. Further aspects of the present invention are a process for polymerizing ethylenically unsaturated monomers, the (co)polymers obtainable by this process and the use of multifunctional triazinyl based 2,2,6,6 tetramethylpiperidine-1-oxyls in combination with a free radical initiator, or a multi-functional triazinyl based 2,2,6,6 tetramethylpiperidine-1-oxyl-ethers for controlled polymerization. In a particularly preferred embodiment at least one additional heating step at a temperature from 140 to 280° C. is applied after polymerization is completed.Type: GrantFiled: April 3, 2003Date of Patent: March 23, 2004Assignee: Ciba Specialty Chemicals CorporationInventors: Wiebke Wunderlich, Rudolf Pfaendner, Raymond Seltzer, James Peter Galbo
-
Publication number: 20040054103Abstract: 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 monomers and one or more conjugated diene monomers in continuous slurry polymerization processes. The process is carried out in an anhydrous polymerization system containing a mixture of the monomers in a polar diluent along with a Lewis acid and a C5 or greater initiator having a tertiary halide.Type: ApplicationFiled: June 2, 2003Publication date: March 18, 2004Inventors: Robert N. Webb, David Y. Chung, Andrew B. Donnalley, Michael E. McDonald, Kenneth W. Powers, Ralph Howard Schatz
-
Patent number: 6699950Abstract: 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 cycloconjugated muitiolefin and an unconjugated cyclic olefin in the presence of an activator comprising a carbo cation producing species, a silica cation producing species and mixtures thereof. The process can be practiced using a slurry polymerization approach. One of the main benefits achieved with the present invention is the conversion of the monomers over a shorter period of time and higher percent conversion than when the activator is not used.Type: GrantFiled: August 30, 2001Date of Patent: March 2, 2004Assignee: Bayer AktiengesellschaftInventors: Juergen Ismeier, Carsten Kreuder, Oskar Nuyken
-
Publication number: 20040030076Abstract: The invention relates to a method for deactivating and recovering boron trifluoride when producing polyisobutenes by means of cationic polymerisation of isobutene or hydrocarbon streams containing isobutene in the liquid phase in the presence of boron trifluoride or in the form of a boron trifluoride catalyst complex. Said catalyst complex is separated, essentially in the liquid phase, from the reactor discharge. Said method contains the following steps, a) removing from the polymerisation reactor at −60 to 0° C., methanol, ethanol or a mixture of methanol and ethanol in such a quantity that an alcohol phase rich in boron trifluoride is deposited b) separating the alcohol phase according to (a) and, (c) from the alcohol phase according to (b) is reintegrated into the inventive method in a suitable manner if desired.Type: ApplicationFiled: May 19, 2003Publication date: February 12, 2004Inventors: Thomas Wettling, Dirk Borchers, Wim Verrelst, Hans Peter Rath
-
Patent number: 6686432Abstract: A copolymer composition that includes a copolymer comprised of at least 30 mol % of residues having the following alternating residues from a donor monomer and from an acceptor monomer. The copolymer contains at least 15 mol % of an isobutylene type donor monomer and at least 15 mol % of an acrylic monomer as an acceptor monomer. The copolymer is substantially free of maleate or fumarate monomer segments and the copolymer composition is substantially free of Lewis acids and transition metals. Also disclosed is a thermosetting composition that includes a reactant comprising functional groups, a crosslinking agent having at least two functional groups that are reactive with the functional groups first reactant, and a copolymer flow control agent that includes the copolymer composition as well as substrates coated with the thermosetting composition.Type: GrantFiled: February 15, 2002Date of Patent: February 3, 2004Assignee: PPG Industries Ohio, inc.Inventors: Simion Coca, Edward R. Coleridge, Gregory J. McCollum, James B. O'Dwyer, James E. Poole, Victoria A. Trettel
-
Patent number: 6683138Abstract: 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 catalyst composition made up of a complex of BF3 and a complexing agent. The feedstock and the catalyst composition are introduced into a residual reaction mixture in a reaction zone where the residual reaction mixture, the feedstock and the catalyst composition are intimately intermixed so as to present an intimately intermixed reaction admixture in said reaction zone. The intimately intermixed reaction admixture is maintained in its intimately intermixed condition and kept at a temperature of at least about 0° C. while the same is in the reaction zone, whereby the isobutylene therein is polymerized to form polyisobutylene having a high degree of terminal unsaturation. A product stream is withdrawn from the reaction zone.Type: GrantFiled: December 31, 2002Date of Patent: January 27, 2004Assignee: Texas Petrochemicals LPInventors: C. Edward Baxter, Jr., Gilbert Valdez, Christopher Lobue, Timothy Lowry
-
Patent number: 6677422Abstract: A method of making a copolymer composition containing a copolymer, which includes the steps of (a) providing a donor monomer composition that includes an isobutylene type monomer; (b) mixing the donor monomer composition with an ethylenically unsaturated monomer composition that includes one or more ethylenically unsaturated acceptor monomers, and is substantially free of maleate type monomers and fumarate type monomers, and (c) polymerizing the mixture resulting from step (b) in the presence of a free radical polymerization initiator. The polymerization is carried out in the substantial absence of Lewis acids and/or transition metals. The isobutylene type monomer is present at a molar excess of at least 10 mol % based on the molar concentration of monomers in the ethylenically unsaturated monomer composition. The ethylenically unsaturated acceptor monomers are present in an amount of at least 15 mol % of the total monomer composition.Type: GrantFiled: February 15, 2002Date of Patent: January 13, 2004Assignee: PPG Industries Ohio, Inc.Inventors: Simion Coca, Edward R. Coleridge, Gregory J. McCollum, James B. O'Dwyer, James E. Poole, Victoria A. Trettel
-
Patent number: 6677395Abstract: Irradiated, oxidized olefin polymer dispersing aids for use in the manufacture of additive concentrates and additive-containing olefin polymer compositions.Type: GrantFiled: November 27, 2002Date of Patent: January 13, 2004Assignee: Basell Poliolefine Italia S.p.A.Inventors: Vu A. Dang, Richard J. Fezza, Daniel E. Schneckenburger, Cheng Q. Song
-
Publication number: 20030212224Abstract: The present invention relates to a polymerizable composition comprising a) at least one ethylenically unsaturated monomer and b1) at least one multifunctional triazinyl based 2,2,6,6 tetramethylpiperidine-1-oxyl and a free radical initiator or b2) at least one multifunctional triazinyl based 2,2,6,6 tetramethylpiperidine-1-oxyl-ether. Further aspects of the present invention are a process for polymerizing ethylenically unsaturated monomers, the (co)polymers obtainable by this process and the use of multifunctional triazinyl based 2,2,6,6 tetramethylpiperidine-1-oxyls in combination with a free radical initiator, or a multi-functional triazinyl based 2,2,6,6 tetramethylpiperidine-1-oxyl-ethers for controlled polymerization.Type: ApplicationFiled: April 3, 2003Publication date: November 13, 2003Inventors: Wiebke Wunderlich, Rudolf Pfaendner, Raymond Seltzer, James Peter Galbo
-
Patent number: 6642329Abstract: 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 by one-stage or multistage, continuous polymerization of isobutene in the liquid phase in the presence of a catalyst comprising boron trifluoride and at least one oxygen-containing compound at below +40° C., wherein the liquid reaction phase has a viscosity of from 6 to 20 mm2/s (determined according to DIN 51562), at least in the first polymerization stage, is described.Type: GrantFiled: April 4, 2002Date of Patent: November 4, 2003Assignee: BASF AktiengesellschaftInventor: Hans Peter Rath
-
Publication number: 20030199647Abstract: The present invention provides a novel process for the preparation of isoolefin copolymers in the presence of zirconium halides or hafnium halides or mixtures thereof and organic nitro compounds, especially for the preparation of butyl rubbers, as well as isoolefin copolymers composed of isobutene, isoprene and, optionally, further monomers.Type: ApplicationFiled: March 21, 2003Publication date: October 23, 2003Inventors: Gerhard Langstein, Martin Bohnenpoll