Adding Nonreactive Material To Chemically Modified Solid Polymer Patents (Class 524/572)
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Patent number: 7381768Abstract: Disclosed is a composition comprising a hydrophobic polymer phase and a water-swollen superabsorbent polymer phase. Also disclosed is a two component system for preparing a composition comprising a hydrophobic polymer phase and a water-swollen superabsorbent polymer phase. The first component is an emulsion of the hydrophobic polymer; the second component comprises the superabsorbent polymer; and the first and second components form the composition when mixed.Type: GrantFiled: April 27, 2004Date of Patent: June 3, 2008Assignee: W.R. Grace & Co. -Conn.Inventors: Robert A. Wiercinski, Xiudong Sun
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Patent number: 7342070Abstract: Disclosed are a conjugated diolefin (co) polymer rubber formed from either a conjugated diolefin or a conjugated diolefin and an aromatic vinyl compound, wherein the (co) polymer rubber has a primary amino group and an alkoxysilyl group which are bonded to a (co) polymer chain; a process for producing the same; a rubber composition; a composite; and a tire. The (co) polymer rubber has satisfactory processability, and can give an automotive tire tread having a balance among wear resistance, failure characteristics, low hysteresis loss and wet-skid characteristics.Type: GrantFiled: September 25, 2002Date of Patent: March 11, 2008Assignee: JSR CorporationInventors: Keisuke Tsukimawashi, Naokazu Kobayashi, Tsukasa Toyoshima, Toshihiro Tadaki, Kouta Taniguchi
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Patent number: 7335706Abstract: The present invention is directed to a method for synthesizing rubbery copolymers, such as styrene-butadiene rubber, or rubbery homopolymers, such as polybutadiene rubber, that are alkoxy functionalized, e.g., alkoxysilane functionalized, and provide desirable dispersion of silica in rubber compounds, such as for use in tire treads. To that end, the method, in one embodiment, involves admixing anionically polymerizable conjugated diene monomers with optional vinyl aromatic, an anionic-polymerization initiator, i.e., an organolithium compound, and a lithium alkoxide to form an admixture of living polymers, then adding a halogenated coupling agent to the admixture of living polymers effecting conditions to form an alkoxy functionalized rubbery polymer. The alkoxy functionalized rubbery polymers can be utilized in tire tread rubbers where the rubbery polymers may provide desirable wear properties without substantially sacrificing other performance characteristic(s), e.g., traction properties.Type: GrantFiled: March 5, 2007Date of Patent: February 26, 2008Assignee: The Goodyear Tire & Rubber CompanyInventors: Adel Farhan Halasa, Wen-Liang Hsu, Scott K. Armstrong
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Patent number: 7335411Abstract: Vulcanizable elastomeric compositions and vulcanizates are prepared by employing a strong acid. The strong acid is believed to enhance the reaction between a silica particle and a silica-reactive compound.Type: GrantFiled: October 26, 2005Date of Patent: February 26, 2008Assignee: Bridgestone CorporationInventors: Chenchy Jeffrey Lin, William L. Hergenrother
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Patent number: 7312271Abstract: Methods are provided for making a solution masterbatch containing a diene elastomer in an organic solvent and a reinforcing silica filler dispersed therein, comprising the steps of (a) mixing a precipitated silica having an average particle size substantially equivalent to an average particle size of a powdered silica, with a diene elastomer in a first organic solvent; and (b) desolventizing the mixture to form a solution masterbatch preparation. The use of such desolventized solution masterbatches in vulcanizable rubber compounds results in excellent processing characteristics with improved dispersion of fillers, including polymeric nanoparticles. The compounds also demonstrate improved properties, including reduced hysteresis.Type: GrantFiled: December 29, 2005Date of Patent: December 25, 2007Assignee: Bridgestone CorporationInventors: Zhong-Ren Chen, Sunji Araki, William M. Cole, William Hergenrother, Sandra Warren
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Patent number: 7279531Abstract: The present invention is directed to rubbery polymers, such as polybutadiene rubber or styrene-butadiene rubber, that contain tin coupling agents and provide desirable dispersion of carbon black in rubber compounds, such as for use in tire treads. The tin coupling agents are defined by the general formulas (I) (X3Sn)2O or (II) (X3Sn)O—(CH2)n—O(X3Sn), wherein X is a halogen and n is 1 to 20. A method of rubbery polymer synthesis, in one embodiment, involves mixing anionically polymerizable conjugated diene monomers with optional vinyl aromatic and an anionic-polymerization initiator, i.e., an organolithium compound, to form a mixture of living polymers. A tin coupling agent is added to the mixture of living polymers effecting polymerization conditions to form the tin coupled rubbery polymer. Such tin coupled rubbery polymers can be utilized in tire tread rubbers where the rubbery polymers may provide desirable wear properties without substantially sacrificing other performance characteristics.Type: GrantFiled: March 5, 2007Date of Patent: October 9, 2007Assignee: The Goodyear Tire & Rubber CompanyInventors: Adel Farhan Halasa, Steven Kristofer Henning, Scott K. Armstrong, Jacob Gerhan
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Patent number: 7241831Abstract: The present invention includes compositions suitable for air barriers such as innerliners where adhesion to tire carcass materials (e.g., SBR) and flexibility are desirable, as well as low air permeability. The invention includes a tire innerliner made by combining a filler; a sulfur cure system; optionally at least one secondary rubber; and at least one halogenated terpolymer of C4 to C8 isoolefin derived units, C4 to C14 multiolefin derived units, and p-alkylstyrene derived units. Examples of suitable fillers include modified carbon black, carbon black, silica, exfoliated clays, and combinations thereof. The present invention also includes a method of producing an elastomeric terpolymer composition comprising combining in a diluent C4 to C8 isoolefin monomers, C4 to C14 multiolefin monomers, and p-alkylstyrene monomers in the presence of a Lewis acid and at least one initiator to produce the terpolymer.Type: GrantFiled: December 9, 2002Date of Patent: July 10, 2007Assignee: ExxonMobil Chemical Patents Inc.Inventors: Walter Harvey Waddell, David Yen-Lung Chung
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Patent number: 7205360Abstract: A preparation process for a copolymer having two blocks usable in a sulphur-cross-linkable rubber composition of reduced hysteresis in the cross-linked state, such a block copolymer in which one of the blocks is a polyisoprene and the other a diene elastomer other than a polyisoprene, and this rubber composition for tire treads. A process for the preparation of this copolymer involves copolymerizing one or more monomers including a conjugated diene other than isoprene using a catalytic system including at least one hydrocarbon solvent, a compound A of a metal of group IIIA, a compound B of an alkaline-earth metal and a polymeric initiator C having a C—Li bond which is constituted of a monolithiated polyisoprene intended to form the polyisoprene block, the number-average molecular weight Mn1 of the polyisoprene block being between 2,500 and 20,000 g/mol.Type: GrantFiled: April 30, 2004Date of Patent: April 17, 2007Assignee: Michelin Recherche et Technique S.A.Inventors: Pierre Robert, Jean-Michel Favrot, Pierre Lesage
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Patent number: 7112632Abstract: A process for the preparation of low branch content polybutadiene comprising: (a) a first butadiene polymerisation stage; (b) treatment of the polymer solution obtained upon completion of stage (a) with a coupling agent selected from: (i) polyunsaturated natural oils; (ii) butadiene and/or isoprene oligomers; (iii) butadiene and/or isoprene co-polymers with vinylarene monomers; the unsaturations present in compounds (i)–(iii) being at least partially substituted with groups selected from epoxides, anhydrides and esters; (c) recovery of the low branch content polybutadiene obtained upon completion of stage (b).Type: GrantFiled: October 17, 2005Date of Patent: September 26, 2006Assignee: Polimeri Europa S.p.A.Inventors: Gian Tommaso Viola, Fabio Bacchelli, Silvia Valenti
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Patent number: 7060748Abstract: A catalyst paste composition for making electrodes has a uniform dispersion condition of a carbon black supporting a hydrogen reduction catalyst and is excellent in storage stability. The catalyst paste composition comprises a carbon black supporting a hydrogen reduction catalyst, an electrolyte, a water-soluble sulfonated polymer and a solvent.Type: GrantFiled: May 20, 2003Date of Patent: June 13, 2006Assignees: JSR Corporation, Honda Motor Co.,Ltd.Inventors: Makoto Higami, Keiichi Bessho
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Patent number: 7030195Abstract: Process for the preparation of polybutadiene with a low branching degree which comprises: (a) a first polymerization step of butadiene in the presence of organic solvents and in the presence of a catalytic system comprising (a1) a derivative of neodymium; (a2) an aluminum alkyl having general formula (I) AlR1R2R3; (a3) an organo aluminum derivative containing at least one halogen atom, preferably chlorine; the above first step being carried out up to a conversion of butadiene >98% to give a linear polybutadiene (gm=1) with a content of 1,4-cis units greater than 93% and a Mw/Mn ranging from 2.2 to 2.9; (b) treatment of the polymeric solution obtained at the end of step (a) with a peroxide, (c) recovery of the polybutadiene with a low branching degree obtained at the end of step (b).Type: GrantFiled: January 21, 2005Date of Patent: April 18, 2006Assignee: Polimeri Europa S.p.A.Inventors: Gian Tommaso Viola, Fabio Bacchelli
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Patent number: 7015277Abstract: An elastomeric composition vulcanizable with sulfur and/or sulfur donors useful for the preparation of tyres, which comprises: a) 100 parts of an elastomeric mixture comprising from 20 to 100% by weight, preferably from 60 to 100% by weight, of a functionalized elastomer (a1), from 0 to 80% by weight of a non-functionalized elastomer (a2) selected from monovinylarene-conjugated diene statistic copolymers, natural rubber, polybutadiene: b) from 10 to 150 parts of silica per 100 parts of (a); c) from 0 to 150 parts of carbon black per 100 parts of (a).Type: GrantFiled: November 7, 2001Date of Patent: March 21, 2006Assignee: Polimeri Europa S.p.A.Inventors: Orsola Casaburo, legal representative, Silvia Biggi, legal representative, Aroldo Biggi, deceased
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Patent number: 6933339Abstract: A vulcanizable nitrile rubber composition comprising 100 parts by weight of a nitrile rubber, 0.1 to 20 parts by weight of a metal silicate and 0.1 to 10 parts by weight of a vulcanizing agent. Vulcanization of this vulcanizable rubber composition gives a vulcanizate exhibiting enhanced heating aging resistance when it is kept in a hot air atmosphere, especially at a high temperature.Type: GrantFiled: April 27, 2001Date of Patent: August 23, 2005Assignee: Zeon CorporationInventors: Yoshiaki Aimura, Suguru Ito
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Patent number: 6896963Abstract: A two-part sizing system for making colorless, densified fiber pellets of a reinforcing fiber material. The densified product may be advantageously produced by first applying a precursor size composition to reinforcing fiber strands, chopping the reinforcing fiber strands into chopped strand segments, applying a binder size, and densifying the chopped strand segments to form densified fiber pellets. The binder size is formulated using a copolymer of maleic anhydride which generates a product free from discoloration. In the process of making the pellets, the sized chopped strands are densified by tumbling in a rotating chamber for a period of time sufficient to increase their density but insufficient to degrade the fibers to a point where composite articles formed from such pellets have lower tensile or impact strengths than comparable composite articles formed from unpelletized strand segments.Type: GrantFiled: December 19, 2002Date of Patent: May 24, 2005Assignee: Owens Corning Composites SPRLInventors: Willy H. Piret, Nadia A. Masson
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Patent number: 6872773Abstract: A readily water-redispersible and water-wettable polymer powder is prepared by spray-drying of an aqueous dispersion of polymer particles with admixing of a hydrophilic and of a hydrophobic antiblocking agent.Type: GrantFiled: April 2, 2004Date of Patent: March 29, 2005Assignee: BASF AktiengesellschaftInventors: Joachim Pakusch, Ines Pietsch, Hans-Jürgen Denu, Heinrich Sack, Bernd Reck
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Patent number: 6867254Abstract: Disclosed is a composition comprising a hydrophobic polymer phase and a water-swollen superabsorbent polymer phase. Also disclosed is a two component system for preparing a composition comprising a hydrophobic polymer phase and a water-swollen superabsorbent polymer phase. The first component is an emulsion of the hydrophobic polymer; the second component comprises the superabsorbent polymer; and the first and second components form the composition when mixed.Type: GrantFiled: September 3, 2002Date of Patent: March 15, 2005Assignee: W.R. Grace & Co., - Conn.Inventors: Robert A. Wiercinski, Xiudong Sun
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Publication number: 20040266944Abstract: Disclosed is a composition comprising a hydrophobic polymer phase and a water-swollen superabsorbent polymer phase. Also disclosed is a two component system for preparing a composition comprising a hydrophobic polymer phase and a water-swollen superabsorbent polymer phase. The first component is an emulsion of the hydrophobic polymer; the second component comprises the superabsorbent polymer; and the first and second components form the composition when mixed.Type: ApplicationFiled: April 27, 2004Publication date: December 30, 2004Applicant: W.R. Grace & Co. - Conn.Inventors: Robert A. Wiercinski, Xiudong Sun
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Patent number: 6822037Abstract: The disclosure relates to a process for improving the processability, storage stability and/or cure rate of an uncured silica reinforced rubber composition where silica comprises the major filler in the reinforced rubber composition, which comprises combining a mixture comprising, rubber, silica and at least one organic compound having a low molecular weight and a functional group wherein said functional group is at least an epoxy group, such as an epoxy/ether, epoxy/hydroxyl, epoxy/ester, epoxy/amine, ether/amine, episulfide, episulfide/ether, episulfide/hydroxyl, episulfide/ester functional group located in a terminal or sterically unhindered position in the molecule of said organic compound where the molecular weight of said organic compound having a low molecular weight is less than 7,000, or the organic compound comprises an abietyl, styrenated resorcinol formaldehyde, or ester hydroxyl organic compound having a hydroxyl, ester, and optionally, an ether group, such as an ester diol.Type: GrantFiled: September 6, 2002Date of Patent: November 23, 2004Assignee: Pirelli Pneumatici S.p.A.Inventors: Stephane Schaal, Aubert Y. Coran, Syed K. Mowdood
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Patent number: 6794428Abstract: A coupler is described for use in carbon black filled rubber compositions. The coupler includes an amine group and a thiol group or a polysulfidic linkage. The coupler improves the interaction of the carbon black with the rubber as measured by a decrease in the tan delta at 60° C. while substantially maintaining the tan delta at 0° C.Type: GrantFiled: October 29, 2002Date of Patent: September 21, 2004Assignee: The Lubrizol CorporationInventors: James D. Burrington, Benny R. Richardson, Joseph W. Pialet, Ann E. Wykoff, Roger L. Sowerby, Kenneth W. Lee, Ralph E. Kornbrekke, Ghebrehiwet N. Ghebremeskel, Kirk E. Davis
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Patent number: 6765045Abstract: Rubber composition vulcanizable with sulfur and tire tread and tire casing comprising the composition, characterized in that the composition comprises: a) at least one polymer selected from the group consisting of diene polymers, olefin/monomeric diene copolymers and isoolefin/halogenated para-alkylstyrene copolymers; b) silica as filler; c) at least one agent of the sulfur-containing silane type promoting the linkage between silica and polymer; d) at least one substituted guanidine; and in that it has at least one of the following characteristics: It has at least one diene polymer which comprises at least one terminal amino group of an aliphatic or cycloaliphatic amine which is bonded thereto at the end of the chain, the polymer then being devoid of the alkoxysilane and silanol group; the composition comprises at least one free aliphatic or cycloaliphatic amine.Type: GrantFiled: April 19, 2000Date of Patent: July 20, 2004Assignee: Michelin Recherche et Technique S.A.Inventors: Marc Daniel, Gérard Labauze
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Publication number: 20040132886Abstract: The invention is directed to a new formulation for making a carboxylated polyacrylonitrile butadiene (usually referred to as nitrile in the glove industry) glove. The new formulation contains no accelerators commonly used in sulfur vulcanization. A sulfur free (including organic sulfur donors) crosslinking system is utilized. The invention provides formulations to make compounds and methods to make such gloves. The new formulations and procedures could be easily realized economically under common glove production lines. Depending on the desired applications, both powdered and powder free gloves are produced in the same formula.Type: ApplicationFiled: February 26, 2003Publication date: July 8, 2004Inventors: Jian Tao, Carrie Webster
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Patent number: 6740704Abstract: The object of the present invention is to provide a method for producing a diene-based rubber/inorganic compound complex capable of allowing a silicic acid compound including silica and the like to be dispersed uniformly and allowing a reinforcing effect to be exerted sufficiently, and a rubber composition containing said complex.Type: GrantFiled: December 11, 2001Date of Patent: May 25, 2004Assignee: JSR CorporationInventors: Tomohisa Konno, Yoshiyuki Udagawa, Toshihiro Tadaki
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Patent number: 6737466Abstract: The disclosure relates to a process for improving the processability, storage stability and/or cure rate of an uncured silica reinforced rubber composition where silica comprises the major filler in the reinforced rubber composition, which comprises combining a mixture comprising, rubber, silica and at least one organic compound having a low molecular weight and a functional group wherein said functional group is at least an epoxy group, such as an epoxy/ether, epoxy/hydroxyl, epoxy/ester, epoxy/amine, ether/amine, episulfide, episulfide/ether, episulfide/hydroxyl, episulfide/ester functional group located in a terminal or sterically unhindered position in the molecule of said organic compound where the molecular weight of said organic compound having a low molecular weight is less than 7,000, or the organic compound comprises an abietyl, styrenated resorcinol formaldehyde, or ester hydroxyl organic compound having a hydroxyl, ester, and optionally, an ether group, such as an ester diol.Type: GrantFiled: September 6, 2002Date of Patent: May 18, 2004Assignee: Pirelli Pneumatici S.p.A.Inventors: Stephane Schaal, Aubert Y. Coran, Syed K. Mowdood
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Patent number: 6727307Abstract: A rubber composition comprises a polar group-containing diene polymer synthesized through an emulsion polymerization as a rubber component, and an inorganic filler represented by a formula of mM.xSiOy.zH2O wherein M is a metal selected from the group consisting of aluminum, magnesium, titanium and calcium, an oxide or a hydroxide of such a metal or an hydrate thereof, m is an integer of 1 to 5, x is an integer of 0 to 10, y is an integer of 2 to 5 and z is an integer of 0 to 10.Type: GrantFiled: December 21, 2001Date of Patent: April 27, 2004Assignees: Bridgestone Corporation, JSR CorporationInventors: Hajime Kondo, Kazuhiro Yanagisawa, Tomohisa Konno, Yoshiyuki Udagawa, Toshihiro Tadaki
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Patent number: 6642291Abstract: A viscoelasticity improving agent for rubber obtained by reacting an alkyllithium compound with a free radical compound having an isocyanate group in the molecule thereof and existing stably at room temperature in the presence of oxygen and a rubber composition.Type: GrantFiled: May 18, 2001Date of Patent: November 4, 2003Assignee: The Yokohama Rubber Co., Ltd.Inventors: Keisuke Chino, Naoshi Miyashita, Makoto Ashiura, Tetsuji Kawazura
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Patent number: 6630204Abstract: Mixtures containing at least one functionalized low-molecular rubber A, at least one cross-linking agent B having groups which are reactive with respect to the functional groups of the rubber A, accelerators/catalysts C for the cross-linking reaction between A and B, possibly reactive diluents D, vulcanization chemicals E, and also fillers F and auxiliary substances G, with at least one of the average functionalities of the constituents A and B being at least 2, and their use as anti-corrosive coating agents.Type: GrantFiled: May 18, 2001Date of Patent: October 7, 2003Assignee: SGL Acotec GmbHInventors: Dirk Hoelter, Thomas Burkhart, Gerd Hessel
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Patent number: 6521698Abstract: The present invention relates to rubbers based on diolefins with a particular lateral polyether group content, mixtures thereof with fillers and the use of said rubbers and mixtures for the preparation of rubber vulcanizates with improved tear propagation resistance and favorable dynamic damping. More particularly, the rubbers according to the present invention are suitable for the manufacture of highly reinforced rubber molded articles, particularly for tires of vehicles, which are used both in road traffic and off-road.Type: GrantFiled: February 22, 2001Date of Patent: February 18, 2003Assignee: Bayer AktiengesellschaftInventors: Thomas Scholl, Jürgen Trimbach
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Publication number: 20020193501Abstract: The present invention provides a method for coloring a rubber substrate with a latex-based colorant comprising the steps of providing a latex-based colorant that includes an elastomeric latex-based binder and a pigment system and mixing the latex-based colorant with the rubber substrate. Optionally, the latex-based colorant further comprises a surfactant system, a thickener, a defoamer, and an antioxidant. The present invention further provides a colored rubber and a latex-based colorant for coloring rubber.Type: ApplicationFiled: July 17, 2002Publication date: December 19, 2002Applicant: Chromascape, Inc.Inventor: Hariharan Rajaraman
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Publication number: 20020183422Abstract: The present invention provides a vibration-insulating rubber molded product having flash, where a thicker portion of the flash can be easily evaluated by visually observing a light-transmittance thereof to prevent the product from 5 cracking, and to find damage of a mold used for forming the product with ease.Type: ApplicationFiled: July 22, 2002Publication date: December 5, 2002Applicant: Honda Giken Kogyo Kabushiki KaishaInventor: Yasuhiro Goshima
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Patent number: 6489037Abstract: A coating that inhibits stain formation in floor covering. The coating includes a copper amine complex, preferably a copper morpholine complex, and is advantageously applied to an underlayment upon which a floor covering is adhered. Coated panels and floor assemblies that include the coating are also described.Type: GrantFiled: August 31, 1999Date of Patent: December 3, 2002Assignee: Weyerhaeuser CompanyInventors: Jack G. Winterowd, Jerry D. Izan, Charles E. Lewis, Daniel V. Hanson, Darrell C. Roden, Albert C. Phillips
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Patent number: 6482884Abstract: The disclosure relates to a process for improving the processability, storage stability and/or cure rate of an uncured silica reinforced rubber composition where silica comprises the major filler in the reinforced rubber composition, which comprises combining a mixture comprising, rubber, silica and at least one organic compound having a low molecular weight and a functional group wherein said functional group is at least an epoxy group, such as an epoxy/ether, epoxy/hydroxyl, epoxy/ester, epoxy/amine, ether/amine, episulfide, episulfide/ether, episulfide/hydroxyl, episulfide/ester functional group located in a terminal or sterically unhindered position in the molecule of said organic compound where the molecular weight of said organic compound having a low molecular weight is less than 7,000, or the organic compound comprises an abietyl, styrenated resorcinol formaldehyde, or ester hydroxyl organic compound having a hydroxyl, ester, and optionally, an ether group, such as an ester diol.Type: GrantFiled: May 15, 2000Date of Patent: November 19, 2002Assignee: Pirelli Pneumatici S.p.A.Inventors: Stephane Schaal, Aubert Y. Coran, Syed K. Mowdood
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Patent number: 6476110Abstract: Rubber compositions filled with an unusually high content of solid magnetizable particles such as iron oxide or strontium ferrite but having great resistance to crack initiation and crack growth. This allows generation of strongly magnetized areas in rubber articles built with a rubber composition according this invention. This gives—also in those applications where a large distance between a row of magnetized areas and a sensor is necessary due to deformation—well-reproducible and well-recognizable signals despite existence of disturbing magnetic fields. The magnetizable particles are bonded to a rubber matrix by a bonding agent, namely an organo-functional silane.Type: GrantFiled: February 18, 2000Date of Patent: November 5, 2002Assignee: Continental AGInventors: Frank Paul Papp, Duane Marle Oxley, James Michael Giustino
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Patent number: 6469082Abstract: A solvent based polychloroprene contact bond adhesive having less than 250 grams per liter volatile organic compounds (VOCs) at high solids content is disclosed. The composition contains polychloroprene polymer, phenolic and tackifying resins, a zinc resinate, metallic oxide and antioxidants, mixed uniformly in a blend of organic solvents. The blend of organic solvents contains VOC exempt solvents as well as aliphatic and aromatic solvents.Type: GrantFiled: June 29, 2001Date of Patent: October 22, 2002Assignee: Illinois Tool Works, Inc.Inventors: Paul A. Raymond, John S. Piwnlca, Jr.
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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: 20020111418Abstract: The object of the present invention is to provide a method for producing a diene-based rubber/inorganic compound complex capable of allowing a silicic acid compound including silica and the like to be dispersed uniformly and allowing a reinforcing effect to be exerted sufficiently, and a rubber composition containing said complex.Type: ApplicationFiled: December 11, 2001Publication date: August 15, 2002Applicant: JSR CorporationInventors: Tomohisa Konno, Yoshiyuki Udagawa, Toshihiro Tadaki
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Publication number: 20020103333Abstract: A method of reducing allergenicity of latex rubber products such as latex rubber gloves. The latex rubber product is treated with first bath of an alkane hydrocarbon followed by a protein substituting material in the form of a synthetic plasticizer. A final wash is carried out using an alkaline or oxidative wash to remove surface and interstice dwelling protein.Type: ApplicationFiled: December 6, 2000Publication date: August 1, 2002Inventor: Travis W. Honeycutt
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Patent number: 6403727Abstract: A process for selectively hydrogenating ethylenically unsaturated double bonds in polymers P involves reacting the polymers P with hydrogen in the presence of at least one hydrogenation catalyst selected from the salts and complex compounds of rhodium and/or of ruthenium in an aqueous dispersion of the polymers P that comprises not more than 20% by volume of an organic solvent. This process can be used to give hydrogenated polymer dispersions and, from these dispersions, polymers. Also claimed are aqueous polymer dispersions comprising polymers P′, which include structural units I, II and III as in claim 10, with or without structural units IV and/or V as in claim 11.Type: GrantFiled: June 1, 2000Date of Patent: June 11, 2002Assignee: BASF AktiengesellschaftInventors: Hartmann F. Leube, Jürgen Schmidt-Thümmes, Edgar Zeller, Heiko Maas
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Publication number: 20020045699Abstract: The present invention relates to rubbers based on diolefins that are characterized in that they have a content of 0.1 to 40 wt. %, relative to the total quantity of rubber, of non-polar lateral, saturated, linear, branched or cyclic hydrocarbons bound via sulfur atoms containing 1 to 22 carbon atoms or aromatic hydrocarbon radicals containing 6 to 22 carbon atoms, wherein the rubbers are produced by polymerization in solution.Type: ApplicationFiled: December 13, 2000Publication date: April 18, 2002Inventors: Thomas Scholl, Jurgen Trimbach
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Publication number: 20020010258Abstract: The present invention relates to the preparation of silica reinforced rubber compositions and to articles of manufacture which contain at least one component comprised thereof Such article of manufacture may be a tire. The silica reinforced rubber composition comprises at least one elastomer, silica, and an organo-metal additive of least one of organo-tin, organo-titanium, and/or organo-zirconium compound, preferably to an exclusion of additional additives to the rubber composition which will readily react with hydroxyl groups (e.g. silanol groups) on the surface of the silica to create an alcohol such as, for example, alkylsilane, alkoxysilane, and bis-(3-alkoxysilylalkyl) polysulfide compounds. Such organo-metal compound may have a valance of four and in the case of the organo-tin compound may have a valance of four or two, preferably four.Type: ApplicationFiled: April 19, 2001Publication date: January 24, 2002Inventors: Daniel Edward Bowen, Eric Sean Castner
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Patent number: 6329449Abstract: The invention relates to a process for the preparation of finely divided rubbers (rubber powders) by precipitation from aqueous mixtures, which comprise filler in the form of suspensions, water-soluble salts of a metal of groups IIa, IIb, IIIa and VIII of the periodic table of the elements arid a rubber latex (polymer latex), aqueous emulsions of a rubber or rubber solution, in which one or more organosilicon compound(s) containing at least one alkoxy group is or are dissolved or emulsified, optionally in the presence of a surface-active substance, in water, or the compounds mentioned are mixed directly, optionally with a surface-active substance, with an aqueous suspension of an oxidic or silicatic finely divided filler or a mixture of these fillers at a temperature of 10 to 60° C., preferably at room temperature, while stirring, the amount of this mixture envisaged for incoporation in the rubber, based on the filler content, in general being divided into two batches.Type: GrantFiled: September 22, 1999Date of Patent: December 11, 2001Assignee: PKU Pulverkautschuk Union GmbHInventors: Udo Gorl, Reinhard Stober, Hartmut Lauer, Uwe Ernst
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Patent number: 6316486Abstract: The present invention relates to new compounds of the formula (I) in which X represents halogen, Y represents halogen or alkyl and Z represents halogen or alkyl, with the proviso that always one of the radicals Y and Z represents halogen while the other represents alkyl, and Het represents one of the groups in which A, B, D and G have the meanings given in the description, to a plurality of processes for their preparation and to their use as pesticides and herbicides.Type: GrantFiled: October 31, 1997Date of Patent: November 13, 2001Assignee: Bayer AktiengesellschaftInventors: Folker Lieb, Hermann Hagemann, Arno Widdig, Michael Ruther, Reiner Fischer, Thomas Bretschneider, Christoph Erdelen, Ulrike Wachendorff-Neumann, Peter Dahmen, Markus Dollinger, Hans-Joachim Santel, Alan Graff, Wolfram Andersch, Norbert Mencke, Andreas Turberg
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Patent number: 6211271Abstract: A process for producing a vulcanizable rubber composition containing silica and carbon black, comprises the step of intimately mixing at a temperature of from 130° to 180° C. at least a first cross-linkable unsaturated chain polymer with a first carbon black-based reinforcing filler, so as to obtain a first rubber composition capable of allowing a subsequent effective dispersion of a second silica-based reinforcing filler and of a second cross-linkable unsaturated chain polymer. The rubber composition thus obtained shows a homogeneous dispersion of the reinforcing fillers, in particular of the silica-based reinforcing filler, constant physical-mechanical characteristics, and improved drawability, and is particularly suitable for the manufacture of tire treads with low rolling resistance.Type: GrantFiled: July 14, 1999Date of Patent: April 3, 2001Assignee: Pirelli Pneumatici S.p.A.Inventors: Luciano Garro, Angela Amaddeo, Roberto Pessina
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Patent number: 6204348Abstract: 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: GrantFiled: May 7, 1998Date of Patent: March 20, 2001Assignee: Borealis GmbHInventors: Manfred Raetzsch, Hartmut Bucka, Achim Hesse, Ulf Panzer, Norbert Reichelt
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Patent number: 6204322Abstract: A sulfur-vulcanizable rubber composition which in vulcanized state is of improved hysteresis, comprising silica as reinforcing filler and a polymer which is coupled and/or starred by means of an agent having the general formula: (Y)m—R1—Si(OR2)3−n—R3n in which Y represents the radical R1 represents an alkyl, cycloalkyl, or aryl radical having 1 to 10 carbon atoms, R2 represents an alkyl, aryl, cycloalkyl, alkaryl or aralkyl radical having from 1 to 12 carbon atoms, R3 represents an alkyl, aryl or alkaryl radical having 1 to 12 carbon atoms, R4 represents a hydrocarbon radical having 1 to 6 carbon atoms and may comprise one or more oxygen atoms in the hydrocarbon chain, n is a whole number selected from among the values 0 and 1, m is a whole number selected from among the values 1 and 2, p and q are whole numbers selected from among the values 0, 1, 2, 3, and 4, it being understood that the sum of p+q must represent a whole number between 2 and 5 inclusiType: GrantFiled: January 20, 1999Date of Patent: March 20, 2001Assignee: Compagnie Generale des EstablissementsInventor: Gérard Labauze
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Patent number: 6172137Abstract: A rubber composition comprised of an elastomer(s), reinforced with a particulate carbon black composite, said composite composed of carbon black having an integral silica on the surface thereof, together with a coupling agent. A method of adjusting electrical conductivity of a rubber composition containing such carbon black composite reinforcement is also provided. A tire having a component of such rubber composition such as, for example, a tread, is specifically contemplated.Type: GrantFiled: February 23, 1998Date of Patent: January 9, 2001Assignee: The Goodyear Tire & Rubber CompanyInventors: Giorgio Agostini, Thierry Florent Edme Materne
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Patent number: 6139675Abstract: Disclosed is a process of manufacturing a water-based adhesive bonded, solvent resistant protective laminate utilizing the steps of: providing a film having a first surface and a second surface; depositing a discontinuous coating of a cross-linkable; carboxylated styrene-butadiene rubber latex adhesive on the first surface of the film, the latex adhesive containing an effective amount of a cross-linking agent; joining a fibrous nonwoven web into intimate bonding contact with the film and adhesive; and removing water from the adhesive thereby causing cross-linking at reactive sites. The adhesive may be deposited utilizing gravure printing techniques and is desirably deposited at a rate greater than about 2 grams per square meter of film. Also disclosed is an adhesively bonded, solvent resistant protective laminate produced by the process. The film component of the laminate may be composed of a thermoset polymer or a thermoplastic polymer. The film may also be microporous or microapertured.Type: GrantFiled: July 16, 1996Date of Patent: October 31, 2000Assignee: Kimberly-Clark Worldwide, Inc.Inventors: Frank Gerald Druecke, Peter Klaus Holzer, Peter Maddern
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Patent number: 6084025Abstract: A functionalized polymer prepared by a process comprising the steps of preparing a solution of a cyclic amine compound, an organolithium compound, and from 3 to about 300 equivalents, based upon one equivalent of lithium, of a monomer selected from the group including diene monomers, vinyl aromatic monomers, and mixtures thereof, where the cyclic amine compound is defined by the formula where R.sub.2 is selected from the group consisting of an alkylene, substituted alkylene, oxy- or N-alkylamino-alkylene group having from about 3 to about 16 methylene groups, N is a nitrogen atom, and H is a hydrogen atom, thereby forming a polymerization initiator having the formula where Li is a lithium atom, SOL is a divalent hydrocarbon group having from 3 to about 300 polymerized monomeric units, y is from 0.5 to about 3, and A is a cyclic amine radical derived from the cyclic amine, charging the solution containing (A)Li(SOL)y with from about 0.Type: GrantFiled: March 15, 1999Date of Patent: July 4, 2000Assignee: Bridgestone CorporationInventors: Takashi Kitamura, David F. Lawson, Koichi Morita, Yoichi Ozawa
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Patent number: 6025450Abstract: A functionalized polymer includes a polymer chain carrying at least one functional group selected from alkyl, dialkyl and cycloalkyl amine radicals having the general formula ##STR1## and cyclic amine radicals having the general formula ##STR2## where R.sub.1 is an alkyl, cycloalkyl or aralkyl having from 1 to about 12 carbon atoms, and R.sub.2 is an alkylene, substituted alkylene, oxy- or N-alkylamino-alkylene group having from about 3 to about 16 methylene groups. The invention also provides products based upon such polymers.Type: GrantFiled: July 9, 1998Date of Patent: February 15, 2000Assignee: Bridgestone CorporationInventors: David F. Lawson, Mark L. Stayer, Jr., David Saffles, Koichi Morita, Yoichi Ozawa, Ryota Fujio, Thomas A. Antkowiak
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Patent number: 6020441Abstract: Polymers containing ethylenically unsaturated double bonds are hydroformylated by reacting aqueous dispersions of the polymers with hydrogen and carbon monoxide in the presence of suitable hydroformylation catalysts.Also provided are the polymer dispersions obtainable by this process and the hydroformylated polymers themselves.Type: GrantFiled: May 12, 1997Date of Patent: February 1, 2000Assignee: BASF AktiengesellschaftInventors: Edgar Zeller, Hartmann F. Leube, Bernhard Schlarb, Heinz-Josef Kneuper, Michael Roper
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Patent number: 6017985Abstract: Novel silicon-containing derivatives of crystalline, high-trans-1,4 polybutadiene in which organosilicon-containing groups are bonded to the 1,2-vinyl carbon atoms along the main chain of the butadiene polymers through the carbon-silicon linkages. These derivatives of butadiene polymers are produced by the addition reaction of an organosilicon-compound having one hydrogen atom directly bonded to the silicon atom in the molecule to the double bonds in the 1,2-vinyl group butadiene polymers. These derivatives having good compatibility with siliceous fillers and when blended with filled diene rubbers are cured to elastomer compositions having excellent properties suitable for the production of tires.Type: GrantFiled: April 21, 1997Date of Patent: January 25, 2000Assignee: Bridgestone CorporationInventors: Jung W. Kang, Jason T. Poulton, Takashi Kitamura