Chemical Treating Agent Contains A Silicon Atom Patents (Class 525/342)
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Patent number: 6627721Abstract: This invention discloses a rubbery polymer which is comprised of repeat units that are derived from (1) at least one conjugated diolefin monomer, and (2) at least one functionalized monomer having of the structural formula: wherein R represents an alkyl group containing from 1 to about 10 carbon atoms or a hydrogen atom, and wherein R1 and R2 can be the same or different and represent hydrogen atoms or a moiety selected from the group consisting of wherein R3 groups can be the same or different and represent alkyl groups containing from 1 to about 10 carbon atoms, aryl groups, allyl groups, and alkyloxy groups of the structural formula —(CH2)y—O—(CH2)z—CH3, wherein Z represents a nitrogen containing heterocyclic compound, wherein R4 represents a member selected from the group consisting of alkyl groups containing from 1 to about 10 carbon atoms, aryl groups, and allyl groups, and wherein n, x, y and z represents integers from 1 to about 10, with theType: GrantFiled: September 19, 2002Date of Patent: September 30, 2003Assignee: The Goodyear Tire & Rubber CompanyInventors: Stephan Rodewald, Steven Kristofer Henning, Brian Earl Burkhart
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Patent number: 6624256Abstract: Disclosed is a method of preparation of a siloxane-functionalized high 1,4-cis polybutadiene using a siloxane compound, in which the siloxane group expands the usage of the high 1,4-cis polybutadiene.Type: GrantFiled: November 9, 2001Date of Patent: September 23, 2003Assignee: Korea Kumho Petrochemical Co. Ltd.Inventors: Gwanghoon Kwag, Aju Kim, Seunghwon Lee
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Publication number: 20030176584Abstract: A coating composition curable by actinic radiation, heat or both comprising a polymer containing an alkoxysilyl group having a weight average molecular weight of from about 500 to more than 10,000, a Radical reactive compound, a cationic polymerization initiator, and an optional radical polymerization initiator and cationic reactive compound.Type: ApplicationFiled: February 24, 2003Publication date: September 18, 2003Inventors: Tsutomu Maruyama, Tetsuo Ogawa
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Patent number: 6613846Abstract: The present invention provides a curable fluoroelastomer composition comprising: (a) a fluoroelastomer comprising a cure site component having a halogen capable of participation in a peroxide cure reaction; (b) an organic peroxide; and (c) a siloxane or silazane comprising one or more —SiH groups. The curable fluoroelastomer compositions generally show improved processing and the resulting cured fluoroelastomers generally have improved mechanical and physical properties.Type: GrantFiled: November 29, 2001Date of Patent: September 2, 2003Assignee: 3M Innovative Properties CompanyInventors: Klaus Hintzer, Robert E. Kolb, Peter J. Scott, Erik D. Hare, William D. Coggio
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Patent number: 6608144Abstract: The invention provides an ethylene-&agr;-olefin-unconjugated polyene random copolymer rubber having hydrolyzable silyl groups in the molecule, which is crosslinkable with air-borne moisture at room temperature and is not only useful for resin modification, but also applicable as elastic sealants and adhesives, and a method for preparing the same.Type: GrantFiled: March 23, 2001Date of Patent: August 19, 2003Assignees: Shin-Etsu Chemical Co., Ltd., Mitsi Chemicals, Inc.Inventors: Tsutomu Nakamura, Takeo Yoshida, Akira Yamamoto, Takashi Hakuta, Yoshiharu Kikuchi, Masaaki Kawasaki
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Publication number: 20030153693Abstract: Compositions including one or more anionic polymerization initiators and one or more additives for improving functionalizing efficiency of living polymer anions are disclosed. The present invention also provides compositions including one or more electrophiles and one or more additives for improving functionalizing efficiency of living polymer anions. Novel electrophiles and processes for improving polymer anion functionalization efficiencies are also disclosed.Type: ApplicationFiled: February 7, 2003Publication date: August 14, 2003Inventors: Roderic Paul Quirk, Young Joon Lee, James Anthony Schwindeman, Robert James Letchford
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Publication number: 20030125474Abstract: A rubber composition of (i) 100 parts by weight of a starting rubber of (A) 40 to 120 parts of SBR and carbon black (CB) having an N2SA of at least 70 m2/g, (B) 40 to 120 parts by weight of an NR-CB rubber composition of NR and CB having an N2SA of at least 70 m2/g, and (C) BR and/or SBR having a Tg higher by at least 10° C. than that of the SBR in the SBR-CB rubber composition (A), wherein the rubber composition has a ratio of the average value FMB of the concentration of CB to the amount of rubber in the CB-containing rubber compositions (A) and (B) and the concentration FCOM of CB to the amount of rubber in the rubber composition of 1.2 to 3.0. In addition a rubber composition containing a CB-containing natural rubber master batch obtained by mixing a natural rubber (NR) starting latex and carbon black (CB) in a water-based medium and coagulating and drying it, an additional starting rubber having a glass transition temperature (Tg) of −50° C. to −20° C.Type: ApplicationFiled: June 19, 2002Publication date: July 3, 2003Inventor: Fumito Yatsuyanagi
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Publication number: 20030114581Abstract: This invention relates to the reversible protection of hydroxy-silane functional groups by acid cleavable protecting groups. The development of reversible protecting groups greatly enhances the current utility of silanes while introducing further novel applications. For instance, reversibly protected silanes are of particular value in applications where room temperature cure and/or adhesion is of value, such as coatings, high resolution imaging, caulks, adhesives, sealents, gaskets, and silicones. Reversibly protected silanes can also be beneficially used in reticulating agents, and in sizing agents, tires, and release coatings. The incorporation of reversibly protected silanes into coating resins is of particular value. The reversibly protected silane can be incorporated into the coating resin by polymerizing a monomer containing the reversibly protected silane into the resin or by post-addition into the coating formulation.Type: ApplicationFiled: August 16, 2002Publication date: June 19, 2003Inventors: Daniel Edward Bowen, Eric Sean Castner
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Publication number: 20030114604Abstract: A composition containing (i) at least one silicon-containing compound, (ii) at least one peroxidic free-radical initiator, and (iii) at least one conjugated hydrocarbon and/or at least one organofunctional silane of the general formula IType: ApplicationFiled: August 22, 2002Publication date: June 19, 2003Applicant: DEGUSA AGInventors: Thomas Schlosser, Aristidis Ioannidis
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Patent number: 6579949Abstract: A vulcanized elastomeric composition of matter comprises the reaction product of a sulfur-containing reagent with an anionic living polymer, the reagent being selected from the group consisting of R3—Si—S—R′—X, where R can all be the same or different and is selected from the group consisting of alkyls having from 1 to 8 carbon atoms, cycloalkyls having from 3 to 11 carbon atoms, or an arylene having from 6 to 14 carbon atoms, and X is a halogen, to form a R3—Si—S—R′ ended polymer; a filler; processing oil; and a cure package containing a deprotecting agent and at least one sulfur cure accelerator.Type: GrantFiled: October 30, 2001Date of Patent: June 17, 2003Assignee: Bridgestone CorporationInventors: William L. Hergenrother, Christine M. Rademacher, James D. Ulmer
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Publication number: 20030100652Abstract: Disclosed is a diene copolymer substituted with polar polysiloxane of the following formula 1 and nanocomposites manufactured therefrom, 1Type: ApplicationFiled: September 17, 2002Publication date: May 29, 2003Applicant: Korea Research Institute of Chemical TechnologyInventors: Eun Kyoung Kim, Mijeong Han
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Publication number: 20030100684Abstract: Rubbery polymers made by anionic polymerization can be coupled with tin halides or silicon halides to improve the characteristics of the rubber for use in some applications, such as tire treads. In cases where the rubbery polymer was synthesized utilizing a polar modifier it is difficult to attain a high level of coupling. This invention is based upon the unexpected finding that coupling efficiency can be significantly improved by conducting the coupling reaction in the presence of a lithium salt of a saturated aliphatic alcohol, such as lithium tamylate. This invention discloses a process for coupling a living rubbery polymer that comprises reacting the living rubbery polymer with coupling agent selected from the group consisting of tin halides and silicon halides in the presence of a lithium salt of a saturated aliphatic alcohol. The lithium salt of the saturated aliphatic alcohol can be added immediately prior to the coupling reaction or it can be present throughout the polymerization and coupling process.Type: ApplicationFiled: November 29, 2002Publication date: May 29, 2003Applicant: The Goodyear Tire & Rubber CompanyInventors: Adel Farhan Halasa, Wen-Liang Hsu
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Patent number: 6566456Abstract: In the present invention, vinylimidazole and [3-(methacryloxy)propyl]trimethoxysilane are copolymerized to form a modified polyvinylimidazole, which then undergoes hydrolysis and condensation reactions with water and tetramethoxysilane to prepare a hybrid of polyvinylimidazole and silica. Experimental analyses show that covalent bondings exist between the modified polyvinylimidazole and silica in the hybrid.Type: GrantFiled: November 3, 2000Date of Patent: May 20, 2003Assignee: Chung-Shan Institute of Science & TechnologyInventors: Jeng-Cheng Yang, Yaw-Shun Hong, Te-Chuan Chang, Yu-Tan Wang
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Patent number: 6559240Abstract: Rubbery polymers made by anionic polymerization can be coupled with both tin halides and silicon halides to improve the characteristics of the rubber for use in some applications, such as tire treads. In cases where the rubbery polymer is synthesized by anionic polymerization utilizing a polar modifier it is difficult to attain a high level of coupling.Type: GrantFiled: November 15, 2001Date of Patent: May 6, 2003Assignee: The Goodyear Tire & Rubber CompanyInventors: Wen-Liang Hsu, Adel Farhan Halasa
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Publication number: 20030083426Abstract: Rubber aircraft parts are made of the cured form of a curable composition comprising a perfluoropolyether polymer having a perfluoropolyether backbone and at least one reactive group, a crosslinking agent for crosslinking the polymer, and a silica filler having an average particle size of 0.001-10 &mgr;m. By providing dramatically improved sealability at low temperatures of −25 to −55° C., particularly during use in a dynamic state, and much improved resistance to amines and other chemicals, such rubber parts can ensure the reliable sealability of fluid line junctions in jet engines.Type: ApplicationFiled: August 29, 2002Publication date: May 1, 2003Inventors: Shinichi Sato, Masatoshi Arai, Yasuhisa Osawa, Makoto Sato
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Patent number: 6555620Abstract: The addition of a compound containing an aliphatically unsaturated bond as a storage stability improver to a hydrosilylating addition reaction type hardenable electrically-conductive composition comprising at least one alkenyl group-containing isobutylene polymer which can undergo hydrosilylation reaction per molecule and an electrical conductivity-providing material makes it possible to obtain an electrically-conductive composition having an excellent storage stability at high temperatures. Further, the use of such an electrically-conductive composition makes it possible to provide an electrically-conductive roller having an excellent productivity and processability and an excellent stability of electrical properties against environmental change.Type: GrantFiled: December 31, 2001Date of Patent: April 29, 2003Assignee: Kaneka CorporationInventors: Takao Manabe, Masashi Sakaguchi
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Patent number: 6552118Abstract: An adhesive curable composition which comprises, as the main component, a vinyl polymer having at least one crosslinkable silyl group represented by the general formula (1). Said composition can be used as a sealing composition, a pressure sensitive adhesive composition and a coating composition.Type: GrantFiled: April 14, 2000Date of Patent: April 22, 2003Assignee: Kaneka CorporationInventors: Masayuki Fujita, Masato Kusakabe, Kenichi Kitano
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Patent number: 6548661Abstract: The present invention provides a polymer-linked composition having the structure: wherein RA and RB are each independently a linear or branched chain alkyl or an aryl group; wherein is a polymeric support; wherein L is a linker selected from the group consisting of a single bond; a saturated or unsaturated oligomethylene chain, etc., a 1,4-phenylene; or a 1,4-phenylenemethylene moiety, said moiety being optionally substituted by at least one linear or branched alkyl, alkoxy group etc.; and wherein RC is a linear or branched acyclic, cyclic or multicyclic moiety, said moiety being optionally unsaturated and/or substituted by at least one hydrogen, ORi, alkyl, etc.; wherein Ri is hydrogen, CHO, COORii, or a substituted or unsubstituted linear or branched chain alkyl, etc.; wherein if RC is cyclic, said moiety is optionally aromatic and/or heterocyclic; or if multicyclic, said moiety is optionally a fused multicyclic, fully or partially aromatic and/or heterocyclic.Type: GrantFiled: September 24, 1998Date of Patent: April 15, 2003Assignee: Sloan Kettering Institute for Cancer ResearchInventors: Samuel J. Danishefsky, Kenneth A. Savin, Jonathan C. G. Woo
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Patent number: 6548599Abstract: There is disclosed a rubber composition comprising: (A) 100 parts by weight of at least one rubber containing olefinic unsaturation; and (B) 1.Type: GrantFiled: February 18, 2002Date of Patent: April 15, 2003Assignee: The Goodyear Tire & Rubber CompanyInventors: Marc Weydert, Wolfgang Lauer, Friedrich Visel, Rene Jean Zimmer, Francois Kayser
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Patent number: 6545103Abstract: Compositions including one or more anionic polymerization initiators and one or more additives for improving functionalizing efficiency of living polymer anions are disclosed. The present invention also provides compositions including one or more electrophiles and one or more additives for improving functionalizing efficiency of living polymer anions. Novel electrophiles and processes for improving polymer anion functionalization efficiencies are also disclosed.Type: GrantFiled: July 2, 2001Date of Patent: April 8, 2003Assignee: FMC CorporationInventors: Roderic Paul Quirk, Young Joon Lee, James Anthony Schwindeman, Robert James Letchford
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Publication number: 20030065104Abstract: The present invention is directed to a rubber composition comprising a diene elastomer, a reinforcing white filler, and a (white filler/elastomer) coupling agent, which is bifunctional and which can be bonded to the elastomer by means of a function X.Type: ApplicationFiled: June 28, 2002Publication date: April 3, 2003Inventors: Salvatore Pagano, Christel Thonier, Gerard Mignani
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Patent number: 6536492Abstract: The present invention provides for a coupling system (white filler/diene elastomer) for a rubber composition based on diene elastomer reinforced with a white filler, formed by the association of a polysulphurized alkoxysilane, a zinc dithiophosphate and a guanidine derivative. The invention also provides a rubber composition usable for the manufacture of tires, comprising, as base constituents, one or more diene elastomer(s), a reinforcing white filler, a polysulphurized alkoxysilane coupling agent with which are associated a zinc dithiophosphate and a guanidine derivative. Also provided is a process for preparing such a rubber composition, and a tire or semi-finished product, in particular a tread for a tire, comprising a rubber composition according to the invention.Type: GrantFiled: January 22, 2001Date of Patent: March 25, 2003Assignee: Michelin Recherche et Technique S.A.Inventor: Didier Vasseur
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Patent number: 6538072Abstract: A method of preparing a multivalent array that includes: polymerizing at least one monomer comprising at least one polymerizable group and at least one latent reactive group in the presence of a metal carbene catalyst to form a polymer template comprising at least one latent reactive group; and combining the polymer template with at least one functionalizing reagent comprising at least one reactive group under conditions effective to react the latent reactive group of the polymer template with the reactive group of the functionalizing reagent to form a multivalent array.Type: GrantFiled: June 22, 2001Date of Patent: March 25, 2003Assignee: Wisconsin Alumni Research FoundationInventors: Laura L. Kiessling, Laura E. Strong
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Publication number: 20030045648Abstract: An (meth)acryloyl group-modified ethylene-&agr;-olefin copolymer (A) which has (meth)acryloyl group as a the side-chain thereof, wherein the intrinsic viscosity [&eegr;] was 0.01 to 10 dl/g measured in decalin at a temperature of 135° C.; and a rubber composition which comprises said (meth)acryloyl group-modified ethylene-&agr;-olefin copolymer, a vulcanizing agent, and/or a crosslinking agent; in addition, a liquid curable rubber composition which comprises, component (A), reactive diluent (D), and if necessary, photopolymerization initiator (E).Type: ApplicationFiled: June 17, 2002Publication date: March 6, 2003Applicant: JSR CORPORATIONInventors: Toshiyuki Hayakawa, Toshihiro Nishimura, Motoharu Higuchi, Minoru Tanaka
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Patent number: 6528592Abstract: This invention relates to a conjugated diene-based rubber composition reinforced with particulate silica-based reinforcement together with 2-hydroxyethyl methacrylate (a non-silane coupling agent) or a combination of 2-hydroxyethyl methacrylate and bis(3-trialkoxysilylalkyl) polysulfide having an average of from 2 to 2.6, or from 3.5 to 4, sulfur atoms in its polysulfidic bridge to aid in the reinforcement of the rubber composition with a particulate silica-based material and an article of manufacture, including a tire, having at least one component comprised of such rubber composition.Type: GrantFiled: September 14, 2000Date of Patent: March 4, 2003Assignee: The Goodyear Tire & Rubber CompanyInventors: Lawson Gibson Wideman, Kevin James Pyle, Richard Robinson Smith, Paul Harry Sandstrom
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Patent number: 6525140Abstract: A continuous process for manufacture of a polymer including branched and linear components comprising first polymerizing conjugated diene(s) in the presence of an organometallic initiator to a conversion that is at least 90% complete. A coupling agent is added to obtain a polymer including branched and linear components. The coupling agent is added at a ratio of about 0.3 to about 0.6 coupling equivalents to initiator equivalents.Type: GrantFiled: March 23, 2000Date of Patent: February 25, 2003Assignee: Firestone Polymers, LLCInventor: Mark N. Dedecker
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Patent number: 6521713Abstract: A rubber composition is disclosed containing an ethylene-propylene-nonconjugated diene copolymer rubber (or a blend of an ethylene-propylene-nonconjugated diene copolymer rubber and a diene rubber), a specific alkoxysilane compound, and amorphous silica powder having a specific surface area of 50 to 100 m2/g (BET adsorption). The vulcanized rubber is prepared by vulcanizing such a rubber composition. The rubber composition is excellent in dynamic characteristics and also in mechanical characteristics, dynamic fatigue resistance and thermal aging resistance. It also can provide a vulcanized rubber having the above-mentioned effects.Type: GrantFiled: April 7, 1995Date of Patent: February 18, 2003Assignees: Degussa AG, Mitsui Petrochemical Industries, Ltd.Inventors: Siegfried Wolff, Rainer Panenka, Marinus Haddeman, Hidenari Nakahama
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Patent number: 6515087Abstract: It is important for rubbery polymers that are used in tires, hoses, power transmission belts and other industrial products to have good compatibility with fillers, such as carbon black, silica, clay (including organoclays), and mixtures thereof. To attain improved interaction with fillers such rubbery polymers can be functionalized with various compounds, such as amines. The present invention discloses a process for synthesizing a rubbery polymer that is functionalized to attain improved compatibility with fillers.Type: GrantFiled: December 6, 2001Date of Patent: February 4, 2003Assignee: The Goodyear Tire & Rubber CompanyInventors: Wen-Liang Hsu, Adel Farhan Halasa, Scott McDowell Christian, Michael Lester Kerns
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Patent number: 6512041Abstract: A crosslinkable fluororubber composition comprising (A) a polymer comprising a perfluoro compound having at least two alkenyl groups and a divalent perfluoroalkylene or perfluoropolyether structure a compound having at least two hydrosilyl groups, the hydrosilyl-bearing compound being added to some of the alkenyl groups in the perfluoro compound, (B) a reinforcing filler, and (C) a crosslinking agent having a hydrosilyl group and capable of addition reaction or a peroxide crosslinking agent, and (D) a surface treating agent having at least one fluoroalkenyl group and silanol group in the molecule, is roll millable and compression moldable. It cures into products having satisfactory solvent resistance, chemical resistance, heat resistance, and low-temperature properties.Type: GrantFiled: August 15, 2001Date of Patent: January 28, 2003Assignee: Shin-Etsu Chemical Co., Ltd.Inventors: Yasuhisa Osawa, Shinichi Sato, Takashi Matsuda
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Publication number: 20030008954Abstract: An objective of the invention is to provide a rubber composition which has satisfactory processability and dimension stability, and the like gives a vulcanized rubber exhibiting excellent wearing resistance and tensile strength, and the like and thus is useful in a belt, a hose and a tire, and the like. A rubber composition of the invention comprises [1] a crosslinked rubber particle component whose toluene-insolubles is 50 % by weight or more and whose number mean particle size is 3 to 1000 nm and [2] a non-crosslinked rubber component whose toluene-insolubles is less than 20 % by weight. This crosslinked rubber particle component is a polymer comprising at least one selected from (1) a conjugated diene unit, (2) a conjugated diene unit and an a, -unsaturated nitrile unit and (3) a conjugated diene unit and an acrylate unit as well as a monomer unit having at least 2 polymerizable unsaturated groups.Type: ApplicationFiled: April 27, 2001Publication date: January 9, 2003Applicant: JSR CorporationInventors: Toshihiro Tadaki, Tomohisa Konno, Yoshiyuki Udagawa, Hiroshi Akema
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Patent number: 6500540Abstract: The present invention relates to elastic articles comprising a crosslinked or crosslinkable ethylene polymer and a method for making the same. In particular, the invention relates to a shaped article (e.g. film or fiber) characterized by improved elasticity at elevated temperatures and comprising a substantially cured, irradiated, or crosslinked (or curable, irradiated or crosslinkable) homogeneously branched ethylene polymer. The improved elastic article of the present invention is particularly suitable for use in applications where good elasticity must be maintained at elevated temperatures such as, for example, personal hygiene items and disposable infection-control garments at body temperatures of about 100° F. (38° C.).Type: GrantFiled: May 18, 1999Date of Patent: December 31, 2002Assignee: The Dow Chemical CompanyInventors: Michael F. Langohr, Selim Bensason, Rajen M. Patel, Jill M. Martin, Thoi H. Ho, Nancy J. Schrock
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Patent number: 6495264Abstract: A composition for film formation which comprises: (A) a product of hydrolysis and condensation obtained by hydrolyzing and condensing at least one silane compound selected from the group consisting of compounds represented by the formula (1), compounds represented by the formula (2), and compounds represented by the formula (3) in the presence of water and at least one compound selected from the group consisting of tetraalkylammonium hydoxides, alicyclic organic amines, and metal hydroxides, and (B) an organic solvent.Type: GrantFiled: April 9, 2001Date of Patent: December 17, 2002Assignee: JSR CorporationInventors: Eiji Hayashi, Kouichi Hasegawa, Youngsoo Seo
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Patent number: 6489403Abstract: Rubbery polymers made by anionic polymerization can be coupled with tin halides or silicon halides to improve the characteristics of the rubber for use in some applications, such as tire treads. In cases where the rubbery polymer was synthesized utilizing a polar modifier it is difficult to attain a high level of coupling. This invention is based upon the unexpected finding that coupling efficiency can be significantly improved by conducting the coupling reaction in the presence of a lithium salt of a saturated aliphatic alcohol, such as lithium t-amylate. This invention discloses a process for coupling a living rubbery polymer that comprises reacting the living rubbery polymer with coupling agent selected from the group consisting of tin halides and silicon halides in the presence of a lithium salt of a saturated aliphatic alcohol.Type: GrantFiled: December 14, 1999Date of Patent: December 3, 2002Assignee: The Goodyear Tire & Rubber CompanyInventors: Adel Farhan Halasa, Wen-Liang Hsu
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Publication number: 20020177670Abstract: (Meth)acrylic polymers having alkenyl or curable silyl groups at the chain ends in high functionality ratios are prepared by a process which comprises (i) preparing a (meth)acrylic polymer having halogen atoms at the chain ends, using an organohalogenated compound or a halosulfonyl compound as an initiator and a metal complex catalyst wherein the central metal atom is selected from the group consisting of the elements of Groups 8, 9, 10 and 11 of the periodic table; and (ii) transforming the halogen atom into an alkenyl group or a curable silyl group-containing substituent.Type: ApplicationFiled: May 13, 2002Publication date: November 28, 2002Applicant: Kaneka CorporationInventors: Masato Kusakabe, Kenichi Kitano
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Patent number: 6472079Abstract: A composition for film formation which comprises: (A) a product of hydrolysis and condensation obtained by hydrolyzing and condensing at least one compound selected from the group consisting of (A-1) compounds represented by the following formula (1) RaSi(OR1)4-a (1) (A-2) compounds represented by the following formula (2) Si(OR2)4 (2) and (A-3) compounds represented by the following formula (3) R3b(R4O)3-bSi—(R7)d—Si(OR5)3-cR6c (3) (B) at least one member selected from the group consisting of compounds of the metals in Groups IA and IIA of the periodic table; and (C) an organic solvent. A method for film formation using the composition and a silica-based film obtained by the method are also disclosed.Type: GrantFiled: April 11, 2001Date of Patent: October 29, 2002Assignee: JSR CorporationInventors: Eiji Hayashi, Michinori Nishikawa, Kinji Yamada
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Patent number: 6469106Abstract: There is provided a process for producing a modified diene polymer rubber, which comprises the steps of: (i) polymerizing a conjugated diene compound, or a combination of a conjugated diene compound and an aromatic vinyl compound in a hydrocarbon solvent in the presence of an alkali metal catalyst, thereby obtaining an active conjugated diene polymer having an alkali metal at the end thereof, and (ii) reacting the active conjugated diene polymer having an alkali metal at the end thereof with an amine compound represented by the specific formula (1), thereby obtaining the modified diene polymer rubber.Type: GrantFiled: August 20, 2001Date of Patent: October 22, 2002Assignee: Sumitomo Chemical Company, LimitedInventors: Katsunari Inagaki, Seiichi Mabe, Yoshihiro Nakatsuji
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Patent number: 6465579Abstract: A silica-polymer composite, featuring a low viscosity and excellent processability when being kneaded with a rubber and superior in dispersibility and tensile strength, comprising a polymer having a polar group containing a hetero atom and a benzene ring or a polymer having a carboxylic acid reacted with silica in a solution.Type: GrantFiled: February 14, 2000Date of Patent: October 15, 2002Assignee: The Yokohama Rubber Co., Ltd.Inventors: Keisuke Chino, Fumito Yatsuyanagi, Hidekazu Onoi
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Patent number: 6462141Abstract: The present invention relates to alkoxysilane-substituted diene copolymers, organic and inorganic hybrid complex compositions comprising the same and a process for the preparation of the same. The alkoxysilane-substituted diene copolymers are prepared by reacting a diene copolymer substituted by epoxy or hydroxy groups with a silane compound. Thus prepared alkoxysilane-substituted diene copolymer is characterized by the facts that it is in organic solvents and it is capable of being cured at low temperatures. The present invention also relates to a composition prepared by mixing the said copolymer with inorganic fillers and/or coupling agents. The copolymer of the formula (1) has high reactivity with coupling agents since it possesses reactive silane groups and thus provides the diene polymer composition as having improved compatibility with inorganic fillers.Type: GrantFiled: December 15, 1999Date of Patent: October 8, 2002Assignee: Korea Research Institute of Chemical TechnologyInventors: Eun-Kyoung Kim, Hyung-Suk Cho, Young-Pil Kim
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Publication number: 20020143114Abstract: The present invention concerns a method of producing a composition based on a polymer crosslinked using a silane, the method comprising the following operations:Type: ApplicationFiled: March 26, 2002Publication date: October 3, 2002Applicant: NEXANSInventor: Chantal Barioz
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Publication number: 20020132929Abstract: There is disclosed a rubber composition comprising:Type: ApplicationFiled: February 18, 2002Publication date: September 19, 2002Inventors: Marc Weydert, Wolfgang Lauer, Friedrich Visel, Rene Jean Zimmer, Francois Kayser
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Publication number: 20020132930Abstract: This invention provides a method for purification of a vinyl polymer which comprises the atom transfer radical polymerization of a vinyl monomer using a transition metal complex as the polymerization catalyst, said vinyl polymer being brought into contact with an oxidizing agent or a reducing agent.Type: ApplicationFiled: August 24, 2001Publication date: September 19, 2002Inventors: Nao Fujita, Kenichi Kitano, Yoshiki Nakagawa
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Publication number: 20020123554Abstract: The present invention relates to an end-modified diene copolymer and a rubber composition for tire tread containing the same. More particularly, the present invention relates to a polymer and a rubber composition for tire tread comprising a mixture of the polymer with a vulcanizing agent and an inorganic filler such as carbon black and silica, the polymer being prepared by reacting the active end of a conjugate diene polymer, or a copolymer comprising at least one conjugate diene compound and a vinyl-substituted aromatic compound, polymerization-initiated using an organic lithium catalyst, with a coupling agent. The rubber composition for tire treads comprising the end-modified diene copolymer as an ingredient rubber enhances rolling resistance and wet skid resistance as well as mechanical properties directly concerned to the properties of the tires.Type: ApplicationFiled: June 29, 2001Publication date: September 5, 2002Inventors: YoungHoon Ko, Dongll Yoon, DaiSeung Choi, JungSu Park
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Patent number: 6441101Abstract: (Meth)acrylic polymers having alkenyl or curable silyl groups at the chain ends in high functionality ratios are prepared by a process which comprises (i) preparing a (meth)acrylic polymer having halogen atoms at the chain ends, using an organohalogenated compound or a halosulfonyl compound as an initiator and a metal complex catalyst wherein the central metal atom is selected from the group consisting of the elements of Groups 8, 9, 10 and 11 of the periodic table; and (ii) transforming the halogen atom into an alkenyl group- or a curable silyl group-containing substituent. The obtained (meth)acrylic polymers form homogeneous curing materials.Type: GrantFiled: September 15, 1999Date of Patent: August 27, 2002Assignee: Kaneka CorporationInventors: Masato Kusakabe, Kenichi Kitano
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Publication number: 20020115767Abstract: A composition of matter is disclosed wherein the composition comprises:Type: ApplicationFiled: December 15, 2000Publication date: August 22, 2002Inventors: Richard W. Cruse, Martin J. Hannon, Prashant G. Joshi, Frederick D. Osterholtz, Robert J. Pickwell
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Patent number: 6433105Abstract: A butadiene-type polymer suitable for use as a processing aid in a rubber composition is formed by polymerizing butadiene or other conjugated diene monomers in a solvent, such as hexane, to form a polymer of relatively low molecular weight (around 30-40,000 g/mole). The polymer is coupled with a coupling agent, such as tin tetrachloride, to increase its molecular weight to a level at which conventional desolventizing processes may be used to remove the solvent from the mix. After desolventizing, the polymer is decoupled, by heating, to return the polymer to its original molecular weight.Type: GrantFiled: June 9, 2000Date of Patent: August 13, 2002Assignee: Bridgestone CorporationInventor: Thomas J. Lynch
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Patent number: 6429239Abstract: The invention concerns a dispersion powder composition which is redispersible in water and is made from water-insoluble organic polymers, the composition being characterized in that it contains 0.1 to 30% by wt., relative to the weight of the organic polymers, of one or more silicon compounds which are dispersible in water and which have a boiling point at normal pressure of 160 degrees C., selected from the group comprising the silanes, polysilanes, oligosiloxanes, carbosilanes, polycarbosilanes, carbosiloxanes, polycarbosiloxanes and polysilylenedisiloxanes. The invention also concerns methods for manufacturing such compounds and their use.Type: GrantFiled: August 16, 2000Date of Patent: August 6, 2002Assignee: Wacker-Chemie GmbHInventors: Herbert Eck, Klaus Adler, Heinrich Hopf, Franz Jodlbauer, Dieter Gerhardinger
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Publication number: 20020099148Abstract: Rubbery polymers made by anionic polymerization can be coupled with both tin halides and silicon halides to improve the characteristics of the rubber for use in some applications, such as tire treads. In cases where the rubbery polymer is synthesized by anionic polymerization utilizing a polar modifier it is difficult to attain a high level of coupling.Type: ApplicationFiled: November 15, 2001Publication date: July 25, 2002Inventors: Wen-Liang Hsu, Adel Farhan Halasa
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Patent number: 6423781Abstract: The reduction of hysteresis in a silica-filled, vulcanized elastomeric compound is produced by mixing diene monomer and optionally monovinyl aromatic monomer with an initiator and a coordinator; effecting polymerization conditions; terminating polymerization with a terminator containing an organo-tin group to form a tin-coupled diene elastomer; compounding the tin-coupled diene elastomer with an amorphous silica filler and a vulcanization agent; and, effecting vulcanization. A pneumatic tire tread stock incorporating the vulcanized elastomer compound exhibits decreased rolling resistance in the tire.Type: GrantFiled: November 28, 2000Date of Patent: July 23, 2002Assignee: Bridgestone CorporationInventors: James Oziomek, William L. Hergenrother
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Patent number: 6420485Abstract: There is disclosed a silylated copolymer which is the reaction product of: (A) an olefin copolymer prepared from at least 50 mole percent of at least one C4 to C7 isomonoolefin monomer and at least one vinyl aromatic monomer; (B) a siloxane having the formula Q-SiR2(OR2Si)n″SiR′Y2 wherein Q is a monovalent group selected from hydrogen or an olefinically unsaturated hydrocarbon group having 2 to 8 carbon atoms, R is an alkyl group having 1 to 4 carbon atoms, R″ is a divalent hydrocarbon group having 1 to 6 carbon atoms, Y is a hydrolyzable organic group, R′ is selected from R or Y and n is an integer having a value of 1 to 9; and (C) a free radical generator.Type: GrantFiled: August 14, 2000Date of Patent: July 16, 2002Assignee: Dow Corning CorporationInventors: Toshio Suzuki, Anne Katja Shim
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Patent number: 6420488Abstract: The present invention provides for a coupling system (white filler/diene elastomer) for a rubber composition based on diene elastomer reinforced with a white filler, formed by the association of a polysulphurized alkoxysilane, an enamine and a guanidine derivative. The invention also provides a rubber composition usable for the manufacture of tires, comprising, as base constituents, one or more diene elastomer(s), a reinforcing white filler, a polysulphurized alkoxysilane coupling agent (white filler/diene elastomer), with which are associated an enamine and a guanidine derivative. Also provided is a process for preparing such a rubber composition, and a tire or semi-finished product, in particular a tread for a tire, comprising a rubber composition according to the invention.Type: GrantFiled: November 28, 2000Date of Patent: July 16, 2002Assignee: Michelin Recherche et Technique S.A.Inventor: Christophe Penot