From Hydrocarbon Monomer Containing At Least Two Ethylenic Groups, E.g., Butadiene, Etc. Patents (Class 526/335)
  • Publication number: 20020183469
    Abstract: The process and catalyst system of this invention can be utilized to synthesize polybutadiene rubber having a high trans content and a low melting point by solution polymerization. The trans-polybutadiene rubber made by the process of this invention can be utilized in tire tread rubbers that exhibit outstanding wear characteristics. More importantly, the trans-polybutadiene rubber of this invention can be easily processed because of its low level of crystallinity. In fact, the trans-polybutadiene made by the process of this invention does not need to be heated in a “hot-house” before being used in making rubber compounds. The process and catalyst system of this invention can also be used in the synthesis of trans-styrene-butadiene rubber (SBR).
    Type: Application
    Filed: June 24, 2002
    Publication date: December 5, 2002
    Applicant: The Goodyear Tire & Rubber Company
    Inventors: Adel Farhan Halasa, Wen-Liang Hsu, Laurie Elizabeth Austin, Chad Aaron Jasiunas
  • Publication number: 20020183468
    Abstract: A process for the manufacture of a baleable lithium carboxylate polymer. The process includes polymerizing at least one conjudated diene in the presence of an organolithium initiator to a substantial completion. Thereafter, the polymerization process is terminated by the addition of carbon dioxide.
    Type: Application
    Filed: March 28, 2001
    Publication date: December 5, 2002
    Inventors: Daniel F. Graves, David J. Dougherty, Thomas A. Antkowiak
  • Publication number: 20020183473
    Abstract: A polymerization process is provided for the preparation of graft (co)polymers. An embodiment of the polymerization process of the present invention comprises copolymerizing macromonomers with (co)monomers utilizing a macroinitiator to form a graft (co)polymer. A further embodiment of a polymerization process of the present invention comprises (co)polymerizing macromonomers and monomers with a graft copolymer macroinitiator to form a block-graft (co)polymer. Another embodiment of the process of the present invention comprises (co)polymerizing macromonomers and monomers with a compatible macroinitiator. The chemical and structural properties of the product graft (co)polymer may be controlled by use of a compatible macroinitiator and the functional group on the macromonomer which effect the relative rates of incorporation of the macromonomer and the monomer. Graft (co)polymers may be prepared with homogeneous or heterogeneous distribution of grafts.
    Type: Application
    Filed: December 21, 2001
    Publication date: December 5, 2002
    Inventors: Krzysztof Matyjaszewski, Jean-Francois Lutz, Hosei Shinoda
  • Patent number: 6489412
    Abstract: A catalyst for bulk polymerization comprising an organometallic compound represented by specified formula and a thiol is provided. The specified organometallic compound is a metallocene compound such as titanocene or zirconocene. The use of this bulk polymerization catalyst comprising a metallocene compound and a thiol enables stable bulk polymerization of a polymerizable unsaturated compound such as an acrylic monomer, the reaction control of which has been difficult in the bulk polymerization of the prior art.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: December 3, 2002
    Assignee: Soken Chemical & Engineering Co., Ltd.
    Inventors: Syuji Okamoto, Hiroshi Ueno
  • Patent number: 6489415
    Abstract: The process and catalyst system of this invention can be utilized to synthesize polybutadiene rubber having a high trans content and a low melting point by solution polymerization. The trans-polybutadiene rubber made by the process of this invention can be utilized in tire tread rubbers that exhibit outstanding wear characteristics. More importantly, the trans-polybutadiene rubber of this invention can be easily processed because of its low level of crystallinity. In fact, the trans-polybutadiene made by the process of this invention does not need to be heated in a “hot-house” before being used in making rubber compounds.
    Type: Grant
    Filed: December 5, 2000
    Date of Patent: December 3, 2002
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Wen-Liang Hsu, Adel Farhan Halasa
  • Patent number: 6486278
    Abstract: This invention is a solution process for the preparation of ethylene-&agr;-olefin-diolefin copolymers comprising contacting ethylene, one or more &agr;-olefin monomer, and one or more cyclic diene monomer, with a catalyst composition comprising a bridged, bis(cyclopentadienyl) zirconium compound having an unsubstituted cyclopentadienyl ligand, a multiply substituted cyclopentadienyl ligand, said ligands bridged by a covalent bridging group containing one or more Group 14 element, and two uninegative, activation reactive ligands and a catalyst activator compound. The invention process exhibits high catalyst activity, high comonomer incorporation and high diene monomer conversion rates and is particularly suitable for the preparation of elastomeric ethylene-propylene or ethylene-propylene-diene monomer elastomers.
    Type: Grant
    Filed: February 17, 1999
    Date of Patent: November 26, 2002
    Assignee: ExxonMobil Chemical Patents Inc.
    Inventors: Rinaldo S. Schiffino, Donna J. Crowther
  • Patent number: 6486258
    Abstract: A conjugated diene rubber composition for tires comprising (I) 2-100 weight parts of a high-cis conjugated diene polymer rubber, which is a polymer of conjugated diene monomer alone or with a copolymerizable monomer, and has a cis-bond unit content of at least 40% in the conjugated diene monomer units, and a weight average molecular weight (Mw) of 20,000-10,000,000, and in which the ratio (Mw/Mn) of weight average molecular weight (Mw) to number average molecular weight (Mn) and the weight average molecular weight (Mw) satisfy the formula: log(Mw/Mn)<0.162×log(Mw)−0.682, and (II) 0-98 weight parts of other polymer rubber. A tire comprising at least a tread composed of the above-mentioned conjugated diene rubber composition has very high rebound resilience.
    Type: Grant
    Filed: December 13, 2000
    Date of Patent: November 26, 2002
    Assignee: Zeon Corporation
    Inventors: Koukichi Noguchi, Takahiko Fukahori, Masao Nakamura
  • Patent number: 6486279
    Abstract: Activation of ruthenium based catalyst compounds with acid to improve reaction rates and yields of olefin metathesis reactions, including ROMP, RCM, ADMET and cross-methasis reactions is disclosed. The ruthenium catalyst compounds are ruthenium carbene complexes of the general formula AxLyXzRu═CHR′ where x=0, 1 or 2, y=0, 1 or 2, and z=1 or 2 and where R′ is hydrogen or a substituted or unsubstituted alkyl or aryl, L is any neutral electron donor, X is any anionic ligand, and A is a ligand having a covalent structure connecting a neutral electron donor and an anionic ligand. The use of acid with these catalysts allows for reactions with a wide range of olefins in a variety of solvents, including acid-initiated RIM processes and living ROMP reactions of water-soluble monomers in water.
    Type: Grant
    Filed: June 14, 2001
    Date of Patent: November 26, 2002
    Assignee: California Institute of Technology
    Inventors: David M. Lynn, Eric L. Dias, Robert H. Grubbs, Bernard Mohr
  • Publication number: 20020173610
    Abstract: A method has been described of preparing monodisperse polymer particles by free radical polymerization or copolymerization of hydrophobic monomers in a water-based system in the presence of cyclodextrin, characterized in that said free radical polymerization is performed with semi-continuous addition of monomer, wherein said monomer is absent before initiating polymerization, and in that a total solid contents of less than 30% by weight is present in said water-based system, in order to provide monodisperse polymer particles which are very suitable for use in many applications as e.g. in inks or toners, in photonic crystal films, in thermal printing plates for computer-to-plate or computer-to-press applications, in inkjet media, in displays, in photographic films, or as a spacing agent.
    Type: Application
    Filed: March 6, 2002
    Publication date: November 21, 2002
    Inventors: Huub Van Aert, Joachim Storsberg, Helmut Ritter, Christiaan Van Roost
  • Patent number: 6482907
    Abstract: Olefins containing selected functional groups such as silyl, ether and alkenyl, and often containing a blocking group, may be copolymerized with unsubstituted olefins such as ethylene and propylene in the presence of certain coordination compounds of nickel or palladium. The resulting polymers are useful as molding resins, elastomers, in adhesives and for films.
    Type: Grant
    Filed: February 1, 2000
    Date of Patent: November 19, 2002
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Lin Wang, Samuel David Arthur, Elizabeth Forrester McCord, Yueli Wang, Peter Arnold Morken, Lynda Kaye Johnson
  • Patent number: 6482906
    Abstract: A new process for the preparation of neodymium neodecanoate, which is utilized as the metallic component, in a new process for the preparation of three-component homogeneous catalytic systems. The invention also deals with a solution polymerization process for the preparation of polybutadiene with a high content of the 1,4-cis units.
    Type: Grant
    Filed: May 16, 2000
    Date of Patent: November 19, 2002
    Assignee: Petroflex Industria E Comércio
    Inventors: Neusa Maria Tocchetto Pires, Luiz Fernando Nicolini, Clóvis Henriques De Lira, Carlos Roberto De Albuquerque Campos, Paulo Luiz De Andrade Coutinho
  • Patent number: 6482930
    Abstract: The invention is related to a novel compound represented by NdHA4 wherein A is a carboxylate, and to a diene polymerization catalyst using the novel compound. NdHA4 has monomeric structure and does not contain water, bases and salts. NdHA4 is mixed with a halogen compound and an organic metal compound to prepare a catalyst system. The catalyst system in the polymerization of 1,3-butadiene (BD) or isoprene produces high cis polydiene with a high activity (100 g BD/4.0×10−5 mole Nd) and without gel formation. The polydiene thus obtained is useful for tires and golf balls and as a polystyrene modifier.
    Type: Grant
    Filed: October 17, 2000
    Date of Patent: November 19, 2002
    Assignee: Korea Kumho Petrochemical Co., Ltd.
    Inventors: Gwang Hoon Kwag, Seung Hwon Lee, Young Chan Jang, A Ju Kim
  • Publication number: 20020169262
    Abstract: Functionalized catalyst supports useful in formation of supported catalyst systems for the polymerization of olefins are disclosed. Methods for preparing functionalized catalyst supports and supported catalyst compositions therefrom as well as polymerization processes utilizing such supported catalysts are also disclosed. The functionalized catalyst support comprises a particulated support material having chemically bonded thereto a plurality of non-ionic, Lewis acid, aluminum-containing groups containing at least one fluoro-substituted hydrocarbyl ligand containing from 1 to 20 carbons bonded to the aluminum, said support being capable of activating a Group 3-10 metal complex for the addition polymerization of one or more addition polymerizable monomers.
    Type: Application
    Filed: June 27, 2002
    Publication date: November 14, 2002
    Applicant: The Dow Chemical Company
    Inventors: Edmund M. Carnahan, Grant B. Jacobsen
  • Patent number: 6479603
    Abstract: The invention provides a process for the living free radical addition polymerization of one or more ethylenically unsaturated monomers using at least one free-radical polymerization initiator and in the presence of one or more stable N-oxyl radicals, wherein at least one stable N-oxyl radical has polymerizable double bonds. The invention additionally provides polymers obtainable by this process, having a polydispersity index PDI of from 1.0 to 1.8, and provides for the use of stable N-oxyl radicals having polymerizable double bonds in the living free radical addition polymerization of one or more different ethylenically unsaturated monomers.
    Type: Grant
    Filed: June 14, 2001
    Date of Patent: November 12, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Yuliang Yang, Junpo He, Jizhuang Cao, Jingming Chen, Chengming Li
  • Patent number: 6479601
    Abstract: This invention is based upon the unexpected discovery that certain catalyst systems which are comprised of (A) a transition metal compound selected from the group consisting of iron (II) compounds, iron (III) compounds, cobalt (II) compounds, cobalt (III) compounds, and nickel (II) compounds; (B) a ligand selected from the group consisting of certain azopyridines and certain iminopyridines; and (C) methylalumoxane can be used to catalyze the polymerization of diene monomers, such as 1,3-butadiene and isoprene, into polymers, such as high cis-1,4-polybutadiene rubber. Some representative examples of azopyridines that can be utilized in the catalyst systems of this invention include 2-phenylazopyridine, 4-methyl-2-phenylazopyridine, and 2,6-diphenylazopyridine. The subject invention more specifically discloses a process for synthesizing a polybutadiene rubber which comprises polymerizing 1,3-butadiene at a temperature which is within the range of about 10° C. to about 100° C.
    Type: Grant
    Filed: June 27, 2000
    Date of Patent: November 12, 2002
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Michael Lester Kerns, Daniel Edward Bowen, III, Stephan Rodewald
  • Publication number: 20020156210
    Abstract: A catalyst composition that is the combination of or the reaction product of ingredients comprising (a) an iron-containing compound, (b) a silyl phosphonate, and (c) an organoaluminum compound.
    Type: Application
    Filed: February 19, 2001
    Publication date: October 24, 2002
    Applicant: Bridgestone Corp.
    Inventor: Steven Luo
  • Publication number: 20020153331
    Abstract: The use is described of particulate, water-insoluble and scarcely swellable polymers of ethylenically unsaturated monomers, which polymers contain, copolymerized, at least 20% by weight, based on the total weight of the monomers, of at least one &agr;,&bgr;-monoethylenically unsaturated monocarboxylic acid having from 3 to 6 carbons as filter aid for filtering aqueous liquids. Subject-matter of the invention are also water-insoluble, scarcely swellable polymers (popcorn polymers) that contain, copolymerized, &agr;,&bgr;-monoethylenically unsaturated carboxylic acids and styrene or styrene derivatives, and also a process for their preparation.
    Type: Application
    Filed: February 19, 2002
    Publication date: October 24, 2002
    Inventors: Marcos Gomez, Tilman C. Rock, Helmut Meffert, Axel Sanner
  • Patent number: 6465585
    Abstract: A catalyst composition that is the combination of or the reaction product of ingredients comprising (a) a chromium-containing compound; (b) an organomagnesium compound; and (c) a silyl phosphonate, also, a process for forming conjugated diene polymers by using the catalyst composition.
    Type: Grant
    Filed: February 19, 2001
    Date of Patent: October 15, 2002
    Assignee: Bridgestone Corporation
    Inventor: Steven Luo
  • Patent number: 6464896
    Abstract: An improved composition and a method of scavenging oxygen using said composition which comprise oxidizable organic compounds, transition metal catalysts in combination with certain photoinitiators is disclosed. The method comprises initiating scavenging by exposing the composition to UV radiation. The present composition uses certain defined benzophenone derivatives which maintain effectiveness of photoinitiation while providing reduced migration of the photoinitiator from the resin matrix.
    Type: Grant
    Filed: October 24, 2000
    Date of Patent: October 15, 2002
    Assignee: Cryovac, Inc.
    Inventors: Drew Ve Speer, Thomas Andrew Blinka, Michael Lee Becraft, Charles Robert Morgan
  • Publication number: 20020147288
    Abstract: New ligands, compositions, metal-ligand complexes and arrays with pyridyl-amine ligands are disclosed that catalyze the polymerization of monomers into polymers. Certain of these catalysts with hafnium metal centers have high performance characteristics, including higher comonomer incorporation into ethylene/olefin copolymers, where such olefins are for example, 1-octene, isobutylene or styrene. Certain of the catalysts are particularly effective at polymerizing propylene to high molecular weight isotactic polypropylene in a solution process at a variety of polymerization conditions.
    Type: Application
    Filed: November 6, 2001
    Publication date: October 10, 2002
    Inventors: Thomas R. Boussie, Gary M. Diamond, Christopher Goh, Keith A. Hall, Anne M. LaPointe, Margarete K. Leclerc, Cheryl Lund, Vince Murphy
  • Patent number: 6462159
    Abstract: Disclosed are a cationic deproteinized natural rubber latex, in which rubber particles are positively charged and the concentration of said rubber particles is from 40 to 65% by weight and that the viscosity at 25° C. of said latex is 200 mPa·s or less, a method of preparing said latex which comprises subjecting to a deprotenization treatment using a proteolytic enzyme and a deproteinizing agent made of one or more surfactant selected from cationic and nonionic surfactants, and optionally adding a post additive comprising a cationic or nonionic surfactant as an active component, thereby to enable both surfactants described above to coexist, and a treating agent used in the same.
    Type: Grant
    Filed: September 8, 2000
    Date of Patent: October 8, 2002
    Assignees: Sumitomo Rubber Industries, Ltd, Kao Corporation
    Inventors: Akihiko Hamada, Naoya Ichikawa, Masaharu Hayashi
  • Publication number: 20020143128
    Abstract: The present invention provides a process for the preparation of a diene elastomer having a reduced amount of vinyl linkages, by anionic polymerization of one or more monomers comprising at least one conjugated diene monomer. The process for preparing the diene elastomer having a reduced amount of vinyl linkages comprises anionically polymerizing one or more monomers comprising at least one conjugated diene monomer in a polymerization medium comprising a hydrocarbon solvent, a polar agent comprising one or more heteroatoms and a monolitiated or polylithiated organolithiated initiator, wherein an organometallic complex of the formula LiAl(R)3 (R′), in which Li is a lithium atom, Al is an aluminum atom, and R and R′ are each an alkyl, cycloalkyl or aryl group, is added to the polymerization medium to produce the diene elastomer having a reduced amount of vinyl linkages.
    Type: Application
    Filed: October 15, 2001
    Publication date: October 3, 2002
    Inventors: Jean-Luc Cabioch, Jean-Noel Gorce
  • Publication number: 20020137862
    Abstract: A process for preparing conjugated diene polymers by polymerizing conjugated diene monomers in the presence of a catalyst composition that is formed by combining an iron-containing compound, a hydrogen phosphite, and an organoaluminum compound.
    Type: Application
    Filed: February 27, 2002
    Publication date: September 26, 2002
    Inventor: Steven Luo
  • Publication number: 20020132946
    Abstract: The present invention relates to the use of water soluble or water dispersible polymers containing carboxyl groups, optionally in latent form, and side-chains of general formula (I) -X-Y-[-O-(-Alk-O) n -R] k as additives in mineral building materials, wherein X, Y, Alk, R, n and k have the meanings cited in claim 1. Said polymers can be obtained by polymerizing ethylenically unsaturated monomers in the presence of compounds containing phosphorus and, optionally, by additional polymer-analogous transformation. The invention further relates to the production of said polymers and the use thereof. Also described are polymers, which can be obtained by polymerizing aromatic vinyl compounds, olefins, cycloolefins and/or dienes, as D monomers and anhydrides of ethylenically unsaturated dicarboxylic acids as E monomers and which can be used both as parent compounds for the above-mentioned polymers and as additives for mineral building materials.
    Type: Application
    Filed: March 15, 2002
    Publication date: September 19, 2002
    Applicant: BASF Aktiengessellschaft
    Inventors: Axel Kistenmacher, Paul Klingelhoefer, Johannes Perner, Markus Hartmann, Alfred Ruland
  • Publication number: 20020128411
    Abstract: Perfluorodiacylperoxides having the following structures: 1
    Type: Application
    Filed: March 4, 2002
    Publication date: September 12, 2002
    Applicant: Ausimont S.p.A.
    Inventors: Walter Navarrini, Marco Galimberti
  • Publication number: 20020123581
    Abstract: The present invention relates to a process for the preparation of rubber-like ethylene/&agr;-olefin copolymers and ethylene/&agr;-olefin/non-conjugate diene terpolymers using a metallocene as catalyst, which process is characterized in that the metallocene used is a compound of the general formula (I) 1
    Type: Application
    Filed: July 13, 2001
    Publication date: September 5, 2002
    Inventors: Peter Schertl, Wolfgang Nentwig, Rudiger Engehausen, Walter Kaminsky, Ulrich Weingarten
  • Patent number: 6444757
    Abstract: A polymer having at least one reactive terminal or pendant functional group that has been capped with a trifunctional olefinic compound. The polymer can be made by contacting a base polymer having at least one reactive terminal or pendant functional group with a trifunctional olefinic compound under conditions effective to react at least one of the terminal or pendant functional groups with the trifunctional olefinic compound. The capped polymers are particularly suitable as crosslinking toughening agents in multi-components compositions such as adhesives, coatings and matrices for composites.
    Type: Grant
    Filed: June 11, 1999
    Date of Patent: September 3, 2002
    Assignee: Lord Corporation
    Inventor: Robin F. Righettini
  • Patent number: 6444762
    Abstract: A process for the continuous anionic polymerization or copolymerization of styrene or diene monomers using an alkali metal alkyl compound as polymerization initiator is carried out in the presence of an alkyl- or arylmetal compound of an element which occurs in at least divalent form as rate regulator, preferably under non-isothermal conditions and without back-mixing in a tubular or tube-bundle reactor, preferably using an alkyl- or arylmetal compound A of the formula R1M1 and an alkyl- or arylmetal compound B of the formula R2nM2 in a molar ratio between B and A of from 0.1:1 to 500:1, where M1 is Li, Na or K; R1 is hydrogen, C1-C20-alkyl, C6-C20-aryl, or C7-C20-alkyl-substituted aryl; M2 is an n-valent element from group 2a, 2b or 3a of the Periodic Table; and R2 is hydrogen, halogen, C1-C20-alkyl or C6-C20-aryl; and a special anionic polymerization initiator containing no Lewis base.
    Type: Grant
    Filed: February 17, 1999
    Date of Patent: September 3, 2002
    Assignee: BASF Aktiengesellschaft
    Inventors: Wolfgang Fischer, Konrad Knoll, Wolfgang Loth, Volker Warzelhan, Alain Deffieux, Philippe Desbois, Michel Fontanille, Stefan Lätsch, Christian Schade, Hermann Gausepohl
  • Publication number: 20020119889
    Abstract: A catalyst in a solid state for polymerization of a conjugated diene or copolymerization of a conjugated diene and an aromatic vinyl compound, which comprises a metallocene-type cation complex of a rare earth metal compound. The catalyst typically is a trivalent rare earth metal compound represented by the general formula (I): RaMXb wherein M represents a rare earth metal; R represents cyclopentadienyl group, a substituted cyclopentadienyl group, indenyl group, a substituted indenyl group, fluorenyl group, or a substituted fluorenyl group; X represents an anion; symbol “a” represents an integer of 1 or 2; and symbol “b” represents an integer of 1 or 2.
    Type: Application
    Filed: September 5, 2001
    Publication date: August 29, 2002
    Applicant: RIKEN
    Inventors: Shojiro Kaita, Zhaomin Hou, Yasuo Wakatsuki
  • Publication number: 20020120086
    Abstract: The invention relates to quaternary polymers, based on conjugate dienes, vinyl-substituted aromatic compounds, olefinically unsaturated nitriles and amino group-containing monomers. The rubber vulcanizates or molded articles, in particular tires, produced from the quaternary polymers or their mixtures with other rubbers are balanced out by good mechanical properties, in particular by a desirable balance in relation to the rolling resistance, skid resistance in the wet and abrasion, which is of particular advantage in tire construction.
    Type: Application
    Filed: September 5, 2001
    Publication date: August 29, 2002
    Inventors: Peter Wendling, Lothar Reif, Jurgen Trimbach, Adrian Rawlinson, Rolf Peter
  • Publication number: 20020120052
    Abstract: The invention relates to quaterpolymers based on conjugated dienes, vinyl-substituted aromatic compounds, olefinically unsaturated nitrites and monomers containing hydroxyl or epoxy groups. The rubber vulcanized products or molded parts, in particular tires, produced from the quaterpolymers and/or their mixtures with other rubbers are characterized by good mechanical properties, in particular by a favorable balance as regards the rolling resistance, antiskid resistance in the wet, and abrasion resistance, which is particularly advantageous for example, in tire manufacture.
    Type: Application
    Filed: November 30, 2001
    Publication date: August 29, 2002
    Inventors: Peter Wendling, Lothar Reif, Jurgen Trimbach, Adrian Rawlinson, Rolf Peter, Rudiger Engehausen
  • Publication number: 20020115806
    Abstract: Fluorinated amine compounds, R′iArF-ER2, where ArF is a fluoroaryl substituent, E is nitrogen or phosphorous, each R is independently a C1-C20 hydrocarbyl substituent, or the two R's may be connected to form an unsubstituted or substituted C2-C20 cycloaliphatic substituent, R′ is a C1-C20 hydrocarbyl or halogenated hydrocarbyl, and i is 0, 1 or 2 are disclosed. These compounds may be protonated and complexed with suitable substantially noncoordinating anions to prepare polymerization catalyst components. When these catalyst components are combined with organometallic catalyst precursors, the catalyst precursor is activated to a catalyst. This catalyst is combined with monomer under olefin polymerization conditions to prepare polymer. High number-average molecular weight polymers at high productivity rates were observed from using metallocene catalysts activated with [N-pentafluorophenyl pyrrolidinium][tetrakis(pentafluorophenyl)borate].
    Type: Application
    Filed: December 11, 2000
    Publication date: August 22, 2002
    Inventor: George Rodriguez
  • Publication number: 20020115802
    Abstract: The present invention provides resin materials endowed with excellent heat resistance, solvent resistance, tensile elongation, toughness, and transparency. Specifically, there are provided an ethylene copolymer having a vinyl group attributed to a diene monomer in the molecular chain and comprising an aromatic vinyl monomer (A), ethylene (B) and a diene monomer (C), and an aromatic vinyl graft copolymer which is a graft copolymerization product of an aromatic vinyl monomer (H) and an ethylene copolymer macromer (I).
    Type: Application
    Filed: February 12, 2002
    Publication date: August 22, 2002
    Applicant: IDEMITSU PETROCHEMICAL CO., LTD.
    Inventors: Hideo Teshima, Masanori Sera
  • Patent number: 6437205
    Abstract: A process for polymerizing 1,3-butadiene into a low molecular weight high-cis polybutadiene is described using a catalyst system comprising: (a) a neodymium-containing compound, (b) an aluminoxane or a trialkyl aluminum compound, (c) an organoaluminum hydride, and (d) a halogen source. A blend of a high molecular weight high-cis polybutadiene and the low molecular weight high-cis polybutadiene is also disclosed for use in pneumatic tire treads. Desirably both the high and the low molecular weight polymers have high cis contents, with the low molecular weight polymer being at least 70 percent cis and the high molecular weight polymer being at least 92 percent cis. Desirably both polymers are made with a neodymium catalyst system. The blends provide a balance of properties including good snow traction, wet traction, and rolling resistance while providing a balance of good physical properties including tension at break, modulus etc.
    Type: Grant
    Filed: July 10, 2000
    Date of Patent: August 20, 2002
    Assignee: Bridgestone Corporation
    Inventors: H. Jerrold Miller, Tatsuro Hamada, Yoichi Ozawa, Peyman Pakdel
  • Patent number: 6433109
    Abstract: Modified polypropylenes of improved processability are produced by a continuous method by absorptively charging polypropylene particles at 20° to 120° C. with a gas mixture, which contains oxygen and bifunctional, unsaturated monomers, and melting the mixture. The modified polypropylenes of improved processability as well as mixtures with unmodified polypropylenes are suitable for the production of films, sheets, fibers, panels, coatings, pipes, hollow objects and foamed materials.
    Type: Grant
    Filed: November 16, 2000
    Date of Patent: August 13, 2002
    Assignee: Borealis GmbH
    Inventors: Manfred Raetzsch, Hartmut Bucka, Achim Hesse, Ulf Panzer, Norbert Reichelt
  • Patent number: 6433083
    Abstract: The present invention provides resin materials for producing molded products endowed with excellent heat resistance, solvent resistance, toughness, tensile elongation, and transparency. Specifically, there are provided aromatic vinyl resin materials which have the following properties: Storage elasticity values G′(1.0) and G′(0.1) as measured at 300° C., a strain &ggr; of 20%, and a frequency of 1.0 Hz or 0.1 Hz satisfy the expression, log[G′(1.0)/G′(0.1)]≦0.6, the heat of fusion &Dgr;H as measured over the range 200-295° C. is 8 to 50 (J/g), and the 1H-NMR peak integrated values for the fraction corresponding to the temperature range of not lower than 50° C., as collected from temperature rising election fraction on the Soxhlet extraction residue by use of cyclohexane or o-dichlorobenzene, satisfy the relation [1.8-2.1 (ppm)]/[1.0-1.7(ppm))<0.49.
    Type: Grant
    Filed: February 2, 2001
    Date of Patent: August 13, 2002
    Assignee: Idemitsu Petrochemical Co., Ltd.
    Inventors: Hideo Teshima, Tomoaki Takebe, Masanori Sera
  • Publication number: 20020107339
    Abstract: The present invention relates to a continuous process for producing elastomers based on conjugated dienes or based on conjugated dienes and vinyl aromatic compounds or based on alkenes, polymerization being carried out while maintaining certain residence times of the monomers used and the elastomers obtained in the reactors while maintaining a certain temperature gradient in the first reactor.
    Type: Application
    Filed: February 1, 2002
    Publication date: August 8, 2002
    Inventors: Thomas Knauf, Josef-Werner Naunheim, Klaus Wiemann
  • Publication number: 20020091189
    Abstract: An objective of the present invention is to provide an unsaturated nitrile-conjugated diene-typed rubber capable of giving a vulcanized rubber which exhibits is well-balanced in terms of the mechanical strength, the oil resistance and the like, as well as a process for the production of the same, and a rubber composition which is containing such rubber and exhibits an excellent processability as well as a process for the production of the same. The unsaturated nitrile-conjugated diene-typed rubber in the invention is produced by polymerizing using certain amounts of an olefinically unsaturated nitrile monomer such as acrylonitrile and a conjugated diene monomer such as butadiene at first, and continuing by supplying a remainder of the monomers at a certain ratio continuously or stepwise to proceed the polymerization.
    Type: Application
    Filed: November 13, 2001
    Publication date: July 11, 2002
    Applicant: JSR Corporation
    Inventors: Katsuhiko Sakata, Osamu Ishikawa
  • Patent number: 6417245
    Abstract: A method of preparing a conjugated polymer which includes: determining a first intermolecular repeat distance and a first tilt angle relative to the translation axis for a guest molecule having a first atom and a second atom; selecting a host molecule having a second intermolecular repeat distance and a second tilt angle relative to the translation axis; synthesizing the host molecule and the guest molecule to form a co-crystal, wherein the first and the second repeat distances and the first and the second tilt angles are about equal so that when said host molecule and said guest molecule are synthesized the first atom and the second atom of adjacent guest molecules are in near van der Waals contact; and polymerizing the co-crystals to form the conjugated polymer. In a preferred embodiment, the guest molecule is a polytriacetylene and the host molecule has an intermolecular repeat distance of from about 6.0 Å to about 8.
    Type: Grant
    Filed: July 20, 2000
    Date of Patent: July 9, 2002
    Assignee: The Research Foundation of State University of NY
    Inventors: Frank W. Fowler, Joseph W. Lauher, Jun Xiao, Meng Yang
  • Publication number: 20020086959
    Abstract: 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: Application
    Filed: August 27, 2001
    Publication date: July 4, 2002
    Inventors: Gerhard Langstein, Martin Bohnenpoll
  • Publication number: 20020086961
    Abstract: The process and catalyst system of this invention can be utilized to synthesize polybutadiene rubber having a high trans content and a low melting point by solution polymerization. The trans-polybutadiene rubber made by the process of this invention can be utilized in tire tread rubbers that exhibit outstanding wear characteristics. More importantly, the trans-polybutadiene rubber of this invention can be easily processed because of its low level of crystallinity. In fact, the trans-polybutadiene made by the process of this invention does not need to be heated in a “hot-house” before being used in making rubber compounds.
    Type: Application
    Filed: December 5, 2000
    Publication date: July 4, 2002
    Inventors: Wen-Liang Hsu, Adel Farhan Halasa
  • Publication number: 20020082374
    Abstract: A process for preparing an aqueous styrene-butadiene polymer dispersion by free-radical aqueous emulsion polymerization of a monomer mixture M comprising
    Type: Application
    Filed: September 20, 2001
    Publication date: June 27, 2002
    Applicant: BASF Aktiengesellschaft
    Inventors: Volker Schaedler, Lambertus Manders, Roland Ettl, Thomas Wirth
  • Patent number: 6410649
    Abstract: A resin composition characterized by comprising from 5 to 95 wt % of an aromatic vinyl compound/olefin random copolymer (A) which has an aromatic vinyl compound content of from 1 to 99 mol % and has a head-to-tail chain structure composed of two or more aromatic vinyl compound units, and from 95 to 5 wt % of an &agr;-olefin type polymer (B) and/or an aromatic vinyl compound type polymer (C) (provided that it is neither a medical material nor a medical device), which contains substantially no chlorine and is excellent in the impact resistance, moldability, weather resistance and chemical resistance and which is useful for an injection molded product, an extrusion molded product, a film, a sheet, etc. Further, it provides an excellent damping material.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: June 25, 2002
    Assignee: Denki Kagaku Kogyo Kabushiki Kaisha
    Inventors: Takeshi Oda, Shigeru Suzuki, Toru Arai, Akio Okamoto, Masataka Nakajima, Hideki Toya
  • Publication number: 20020077435
    Abstract: A method of forming a polymer having reactive functionality comprises providing a reaction mixture comprising at least one monomer having at least one reactive functional group and carbon dioxide; and polymerizing the at least one monomer in the reaction mixture to form a polymer having reactive functionality associated with the at least one reactive functional group.
    Type: Application
    Filed: October 4, 2001
    Publication date: June 20, 2002
    Inventors: Joseph M. DeSimone, Jennifer L. Young
  • Patent number: 6407026
    Abstract: A catalyst composition that is the combination of or the reaction product of ingredients including an iron-containing compound, a hydrogen phosphite, and a mixture of two or more organoaluminum compounds. This catalyst composition is particularly useful for polymerizing conjugated dienes. When this catalyst composition is used to polymerize 1,3-butadiene into syndiotactic 1,2-polybutadiene the ratio of the organoaluminum compounds can be adjusted to vary the melting temperature and molecular weight of the polymer product.
    Type: Grant
    Filed: July 2, 2001
    Date of Patent: June 18, 2002
    Assignee: Bridgestone Corporation
    Inventor: Steven Luo
  • Patent number: 6407187
    Abstract: A new polymerization process (atom transfer radical polymerization, or ATRP) based on a redox reaction between a transition metal (e.g., Cu(I)/Cu(II), provides “living” or controlled radical polymerization of styrene, (meth)acrylates, and other radically polymerizable monomers. Using various simple organic halides as model halogen atom transfer precursors (initiators) and transition metal complexes as a model halogen atom transfer promoters (catalysts), a “living” radical polymerization affords (co)polymers having the predetermined number average molecular weight by &Dgr;[M]/[I]0 (up to Mn>105) and a surprisingly narrow molecular weight distribution (Mw/Mn), as low as 1.15. The participation of free radical intermediates in ATRP is supported by end-group analysis and stereochemistry of the polymerization. In addition, polymers with various topologies (e.g.
    Type: Grant
    Filed: March 3, 1998
    Date of Patent: June 18, 2002
    Assignee: Carnegie Mellon University
    Inventors: Krzysztof Matyjaszewski, Jin-Shan Wang
  • Patent number: 6403737
    Abstract: A process for the preparation of amorphous copolymers of ethylene with &agr;-olefins and optionally minor amounts of polyenes are disclosed, which have the following characteristics: (A) the % by mole content of &agr;-olefin in the copolymer (%&agr;) and the ratio between the molar amount of &agr;-olefin diads and the molar content of &agr;-olefin in the copolymer (&agr;&agr;/&agr;) satisfy the following relationship: (%&agr;)−250 (&agr;&agr;/&agr;)≧10 (B) less than 2% of the CH2 groups in the polymeric chain are in sequences (CH2)n, wherein n is an even number. These copolymers are obtained by operating in the presence of particular metallocene-based catalysts having two fluorenyl groups joined together through a bridging group.
    Type: Grant
    Filed: October 24, 2000
    Date of Patent: June 11, 2002
    Assignee: Basell Technology Company BV
    Inventors: Maurizio Galimberti, Luigi Resconi, Enrico Albizzati
  • Patent number: 6403747
    Abstract: 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 multiolefin monomer at a temperature in the range of from about −100° C. to about +50° C. in the presence of an aliphatic hydrocarbon diluent and a catalyst mixture comprising a major amount of a dialkylalumium halide, a minor amount of a monoalkylaluminum dihalide, and a minute amount of at least one of a member selected from the group comprising water, aluminoxane and mixtures thereof.
    Type: Grant
    Filed: October 21, 1999
    Date of Patent: June 11, 2002
    Assignee: Bayer Inc.
    Inventor: Adam Gronowski
  • Patent number: 6399732
    Abstract: A process for preparing conjugated diene polymers by polymerizing conjugated diene monomers in the presence of a catalyst composition that is formed by combining an iron-containing compound, a hydrogen phosphite, and an organoaluminum compound.
    Type: Grant
    Filed: December 30, 1999
    Date of Patent: June 4, 2002
    Assignee: Bridgestone Corporation
    Inventor: Steven Luo
  • Patent number: 6399671
    Abstract: This invention relates to rubber polymers based on polymerizable monomers and having an elevated gel content together with an elevated degree of swelling, to the production of the stated rubber polymers and to the use thereof for the production of moldings of all kinds.
    Type: Grant
    Filed: July 22, 1999
    Date of Patent: June 4, 2002
    Assignee: Bayer Aktiengesellschaft
    Inventors: Martin Hoch, Hermann Meisenheimer, Lothar Sesterhenn