Sulfur Containing Chemical Treating Agent Patents (Class 525/331.8)
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Patent number: 11261319Abstract: A composition composed of at least a first ethylene/?-olefin/nonconjugated polyene interpolymer, which can be used to produce low compression set, foamed rubber materials, articles made from the composition, and methods of producing the composition and articles.Type: GrantFiled: December 26, 2016Date of Patent: March 1, 2022Assignee: Dow Global Technologies LLCInventors: Colin LiPiShan, Juan C. Tuberquia, Teresita Kashyap, Isao Hattori, Tao Han, Cory M. Thomas West
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Patent number: 9023926Abstract: The present invention relates to a process for producing rubber mixtures in a mixing process with, for example, a plurality of mixing stages, where these can optionally be divided into a plurality of sub-steps, comprising the mixing of the following components: one or more rubbers, one or more hydroxylated oxidic fillers, one or more sulphur-containing organosilicon and/or one or more hydroxypolysulphidic compounds, one or more anti-reversion agents selected from 1,6-bis(N,N-dibenzyl-thiocarbamoyldithio)hexane (CAS No.: 151900-44-6), 1,3-bis((3-methyl-2,5-dioxopyrrol-1-yl)methyl)benzene (CAS No.: 119462-56-5) and hexamethylene 1,6-bis(thiosulphate), disodium salt, dihydrate (CAS No.: 5719-73-3), individually and mixtures thereof, where these are incorporated into the mixture in the first mixing stage, one or more vulcanization additives, one or more rubber additives.Type: GrantFiled: April 27, 2012Date of Patent: May 5, 2015Assignee: LANXESS Deutschland GmbHInventors: Melanie Wiedemeier, Hermann-Josef Weidenhaupt, Heinz Unterberg, Ulrich Feldhues
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Patent number: 8940841Abstract: A crosslinked product of a polyarylene is disclosed, having high-temperature elastomeric properties and excellent chemical resistance. The crosslinked materials are useful in oil and gas downhole applications in the form of either solids or foams. Methods for the manufacture of the crosslinked product and articles comprising the product are also disclosed.Type: GrantFiled: May 22, 2012Date of Patent: January 27, 2015Assignee: Baker Hughes IncorporatedInventors: Ping Duan, Gaurav Agrawal, David P. Gerrard
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Patent number: 8859638Abstract: A low pressure, low volatile, low energy method to make an ethylene, propylene diene terpolymer latex usable in paints, adhesives, and as a coating.Type: GrantFiled: March 27, 2014Date of Patent: October 14, 2014Assignee: Lion Copolymer Geismar, LLCInventors: Michael J. Molnar, George A. Von Bodungen, Subir Debnath, Harold William Young, Jr., Zhiyong Zhu
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Patent number: 8846170Abstract: A sulfur-containing cycloaliphatic compound, useful as a crosslinker for filled sulfur-vulcanizable elastomer compositions, is represented by the general formula: G[-CaH2a—S[C(?O)]bR]n wherein G is selected from the group consisting of: saturated, monocyclic aliphatic group of valence n containing from 5 to 12 carbon atoms and optionally containing at least one halogen, and saturated monocyclic silicone [RSiO—]n[R2SiO—]p group of valence n; wherein each R independently is a hydrogen or monovalent hydrocarbon of up to 20 carbon atoms; each occurrence of subscripts a and b independently is an integer wherein a is 2 to 6 and b is 0 or 1; p is an integer of from 0 to 3; and, n is an integer of from 3 to 6, with the provisos that when b is 0, R is a hydrogen atom, and when G is a non-halogenated, saturated monocyclic aliphatic group of 6 carbon atoms, n cannot be 3.Type: GrantFiled: January 17, 2012Date of Patent: September 30, 2014Assignee: Momentive Performance Materials Inc.Inventors: Richard W Cruse, William Michael York, Carla Recker, Thomas Kramer, Katharina Herzog
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Patent number: 8829119Abstract: A crosslinked product of a polyarylene is disclosed, having high-temperature elastomeric properties and excellent chemical resistance. The crosslinked materials are useful in oil and gas downhole applications in the form of either solids or foams. Methods for the manufacture of the crosslinked product and articles comprising the product are also disclosed.Type: GrantFiled: September 27, 2011Date of Patent: September 9, 2014Assignee: Baker Hughes IncorporatedInventors: Ping Duan, Gaurav Agrawal, David P. Gerrard
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Patent number: 8772414Abstract: The invention provides a composition comprising an ethylene/?-olefin/non-conjugated diene interpolymer, which has the following properties: an Mz(abs)/Mz(Conv) value greater than 1.35; an Mz(BB)/Mw(abs) value greater than 1.6; and a non-conjugated diene content less than 10 weight percent, based on the total weight of the interpolymer.Type: GrantFiled: September 16, 2009Date of Patent: July 8, 2014Assignee: Dow Global Technologies LLCInventors: Wenbin Liang, Brian W. Walther, Gary R. Marchand
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Patent number: 8653170Abstract: Described in one aspect is a process for preparing a low durometer thermoplastic vulcanizate composition comprising melt blending one or more thermoplastic polymer(s) with a cross-linkable elastomer under conditions of dynamic vulcanization; adding at or after the start of the melt blending at least one curative agent for the elastomer so as to cross-link the elastomer during the melt blending; introducing process oil into the melt blending before, during and/or after the addition of the curative agent; and, extruding a fully crosslinked thermoplastic vulcanizate having a Shore A Hardness of less than 25.Type: GrantFiled: March 15, 2006Date of Patent: February 18, 2014Assignee: ExxonMobil Chemical Patents Inc.Inventors: Hari Prasad Nadella, Ronald DeYoung, Jianya Cheng
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Patent number: 8378035Abstract: An object of the present invention is, in a thermoplastic elastomer composition in which a modified rubber is filled and dispersed in a polyamide resin matrix in order to improve the low-temperature durability of the polyamide resin, to reduce the extrusion load during extrusion molding thereof into a film without deteriorating the low-temperature durability. The present invention is a thermoplastic elastomer composition (E) comprising a modified polyamide resin (C) and a modified rubber (D) dispersed in the modified polyamide resin (C), the modified polyamide resin (C) being a resin obtained by melt-blending an polyamide resin (A) and a compound (B) capable of reacting with a terminal amino group of a polyamide resin, wherein the modified rubber (D) has an acid anhydride group or epoxy group and is dynamically cross-linked by a compound (F) having at least one disulfide bond and at least two amino groups.Type: GrantFiled: August 2, 2010Date of Patent: February 19, 2013Assignee: The Yokohama Rubber Co., Ltd.Inventors: Koichi Kawaguchi, Naoyuki Morooka
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Patent number: 8293851Abstract: A sulfonated copolymer including a crosslinking functional group and a fuel cell including a polymer composition of the same are provided. The sulfonated copolymer including a crosslinking functional group can remarkably reduce methanol crossover and maintain superior dimensional stability and ionic conductivity by reducing swelling.Type: GrantFiled: April 29, 2011Date of Patent: October 23, 2012Assignee: Samsung SDI Co., Ltd.Inventors: Jae-Jun Lee, Do-yun Kim, Sang-kook Mah
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Patent number: 8268930Abstract: The invention constituting the subject matter of this application is related to the production method and process regarding any and all products created by forming the EPDM rubber including a mixture of ethylene, propylene and diene by using heat and particularly the seal of the door gasket, which is a part of the washing machines.Type: GrantFiled: January 21, 2009Date of Patent: September 18, 2012Inventor: Yavuz Dogan
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Patent number: 8258241Abstract: A method for producing a modified conjugated diene polymer includes a modification step (A) that subjects a conjugated diene polymer having a cis-1,4-bond content of 98.5% or more and possessing an active end to a modification reaction to introduce an alkoxysilane compound having two or more reactive groups including an alkoxysilyl group into the active end of the conjugated diene polymer, and a condensation step (B) that subjects the residue of the alkoxysilane compound introduced into the active end to a condensation reaction in the presence of a condensation catalyst that includes at least one element among the elements of the groups 4A, 2B, 3B, 4B, and 5B in the periodic table. The method can produce a modified conjugated diene polymer that exhibits low heat build-up and excellent wear resistance.Type: GrantFiled: December 27, 2007Date of Patent: September 4, 2012Assignee: JSR CorporationInventors: Ryouji Tanaka, Takahiro Nakamura, Takuo Sone, Toshihiro Tadaki
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Patent number: 8124206Abstract: A sulfur-containing cycloaliphatic compound, useful as a crosslinker for filled sulfur-vulcanizable elastomer compositions, is represented by the general formula: G[-CaH2a—S[C(?O)]bR]n wherein G is selected from the group consisting of: saturated, monocyclic aliphatic group of valence n containing from 5 to 12 carbon atoms and optionally containing at least one halogen, and saturated monocyclic silicone [RsiO—]n[R2SiO—]p group of valence n; wherein each R independently is a hydrogen or monovalent hydrocarbon of up to 20 carbon atoms; each occurrence of subscripts a and b independently is an integer wherein a is 2 to 6 and b is 0 or 1; p is an integer of from 0 to 3; and, n is an integer of from 3 to 6, with the provisos that when b is 0, R is a hydrogen atom, and when G is a non-halogenated, saturated monocyclic aliphatic group of 6 carbon atoms, n cannot be 3.Type: GrantFiled: October 30, 2008Date of Patent: February 28, 2012Assignee: Momentive Performance Materials, Inc.Inventors: Richard W. Cruse, William Michael York, Carla Recker, Thomas Kramer, Katharina Herzog
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Patent number: 8030414Abstract: The invention relates to novel polymers or oligomers containing at least sulfinate groups (P—(SO2)nX, X=1-(n=1), 2-(n=2) or 3-(n=3) valent metal cation or H+ or ammonium ion NR4+ where R=alkyl, aryl, H), which are obtained by completely or partially reducing polymers or oligomers containing at least SO2Y-groups (Y?F, Cl, Br, I, OR, NR2 (R=alkyl and/or aryl and/or H), N-imidazolyl, N-pyrazolyl) by means of suitable reducing agents in a suspension or in a solution form. Polymer and polymer(blend)membranes which are obtained by further reacting the received sulfinated polymers, especially by alkylation of the sulfinate groups with mono- di- or oligo functional electrophiles. The invention further relates to methods for producing the sulfinated polymers and for further reacting the sulfinated polymers with electrophiles by S-alkylation.Type: GrantFiled: November 26, 2008Date of Patent: October 4, 2011Inventors: Thomas Haring, Jochen Kerres, Wei Zhang
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Patent number: 8017694Abstract: Nonconjugated conductive polymers, which are all polymers that have a ratio of double bonds to total bonds of less than ½ are doped with iodine to produce compositions with unexpected characteristics in this invention. The mechanical and elastomeric properties of a nonconjugated polymer can be enhanced by doping the polymer with an electron acceptor such as iodine, in order to cure the polymer. Among the nonconjugated polymers are the cis-1,4-polyisoprene, cis-1,4 polybutadiene, styrene-butadiene copolymers (SBR), ethylene-propylene-diene monomer and poly (?-pinene). A heated mixture of iodine and sulfur produces a faster rate of vulcanization of rubber than using sulfur alone.Type: GrantFiled: October 2, 2008Date of Patent: September 13, 2011Inventor: Mrinal Thakur
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Patent number: 8013073Abstract: Disclosed is a method for preparing polyolefins containing vinylidine end groups from quasiliving carbocationically terminated polyolefin polymers by contacting the quasiliving carbocationically terminated polymer with a suitable nonaromatic heterocyclic ring quenching agent and substituted derivatives thereof.Type: GrantFiled: February 16, 2006Date of Patent: September 6, 2011Assignees: Chevron Oronite Company LLC, The University of Southern MississippiInventors: Casey D. Stokes, Robson F. Storey
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Patent number: 7964676Abstract: A sulfonated copolymer including a crosslinking functional group and a fuel cell including a polymeric composition of the same are provided. The sulfonated copolymer including a crosslinking functional group can remarkably reduce methanol crossover and maintain superior dimensional stability and ionic conductivity by reducing swelling.Type: GrantFiled: November 21, 2006Date of Patent: June 21, 2011Assignee: Samsung SDI Co., LtdInventors: Jae-jun Lee, Do-yun Kim, Sang-kook Mah
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Patent number: 7838601Abstract: Partially neutralized chlorosulfonated polyolefin elastomers containing 0.5-10 weight percent chlorine and 0.25 to 5 weight percent sulfur are prepared from polyolefin elastomer base resins selected from the group consisting of propylene/ethylene copolymers, ethylene/propylene/diene copolymers, isobutylene/diene copolymers, isobutylene homopolymers, hydrogenated styrene/butadiene block copolymers and hydrogenated styrene/isoprene block copolymers.Type: GrantFiled: March 13, 2008Date of Patent: November 23, 2010Assignee: DuPont Performance Elastomers L.L.C.Inventors: Royce Elton Ennis, Avinash C. Gadkari, Furman Eugene Glenn
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Publication number: 20090227730Abstract: The instant invention discloses a process for preventing contact discoloration of substrates coming into contact with elastomers and stabilizing elastomers to prevent oxidative, thermal, dynamic, light-induced and/or ozone-induced degradation, which comprises incorporating into the elastomers, or applying to these, at least a compound of the formula (I) wherein R1 is C1-C12alkyl, R2 is C1-C12alkyl, or R1 and R2 together with the carbon atom to which they are attached form an unsubstituted or with C1-C4alkyl substituted C5-C12cycloalkyl ring; R3 is hydrogen or —CH2—S(O)m—R5, R4 and R5 independently of each other are unsubstituted or with cyano substituted C5-C18-alkyl; C7-C9phenylalkyl, unsubstituted or with halogen, hydroxyl, cyano or C1-C4alkyl substituted phenyl or naphthyl; benzothiazolyl or —R6—CO2—R7, R6 is C1-C18alkylene, R7 is C1-C18alkyl, and m is 0, 1 or 2.Type: ApplicationFiled: October 2, 2006Publication date: September 10, 2009Applicant: Ciba CorporationInventors: Michèle Gerster, Hans-Rudolf Meier, Gerrit Knobloch, Pierre Rota-Graziosi
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Patent number: 7553910Abstract: The invention relates to a process for preparing dithiols derivatized with dithiocarbamic acids, in which the derivatized dithiols are obtained in high yield and purity.Type: GrantFiled: May 24, 2005Date of Patent: June 30, 2009Assignee: LANXESS Deutschland GmbHInventors: Hartmuth Buding, Hermann-Josef Weidenhaupt, Winfried Jeske, Thomas Kleiner
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Publication number: 20090020731Abstract: Nonconjugated conductive polymers, which are all polymers that have a ratio of double bonds to total bonds of less than ½ are doped with iodine to produce compositions with unexpected characteristics in this invention. The mechanical and elastomeric properties of a nonconjugated polymer can be enhanced by doping the polymer with an electron acceptor such as iodine, in order to cure the polymer. Among the nonconjugated polymers are the cis-1,4-polyisoprene, cis-1,4 polybutadiene, styrene-butadiene copolymers (SBR), ethylene-propylene-diene monomer and poly (?-pinene). A heated mixture of iodine and sulfur produces a faster rate of vulcanization of rubber than using sulfur alone.Type: ApplicationFiled: October 2, 2008Publication date: January 22, 2009Inventor: Mrinal Thakur
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Patent number: 7241843Abstract: A rubber composition for a tread optimizing a vulcanization speed in a vulcanization step and, further, improving heat aging resistance is provided. A rubber composition for a tread comprising 20 to 90 parts by weight of silica, 0.5 to 2 parts by weight of (A) a guanidine vulcanization accelerator, 0.1 to 0.5 part by weight of (B) a thiuram vulcanization accelerator, and 0.5 to 2 parts by weight of (C) a sulfenamide vulcanization accelerator represented by the general formula (1): (wherein R is a linear alkyl group or a branched alkyl group having 1 to 18 carbons), based on 100 parts by weight of a rubber component.Type: GrantFiled: June 5, 2006Date of Patent: July 10, 2007Assignee: Sumitomo Rubber Industries, Ltd.Inventor: Tatsuya Miyazaki
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Patent number: 7202307Abstract: A sulfur curing system EPDM composition in which one or more types of vulcanization accelerators selected from thiazole type and sulfenamide type accelerators and one or more types of vulcanization accelerators selected from dithiocarbamate type and thiuram type accelerators are combined together so as to be compounded into the EPDM composition as a vulcanization accelerator, and an automotive brake system rubber component made of the EPDM composition.Type: GrantFiled: February 21, 2006Date of Patent: April 10, 2007Assignee: Toyoda Gosei Co., Ltd.Inventors: Hidekazu Kurimoto, Kiyomitsu Terashima, Hidenori Hayashi, Yasushi Nakahara
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Patent number: 7160955Abstract: Polymers grafted with a compound of formula I, formula (I) wherein the general symbols are as defined in claim 1, have outstanding stability against oxidative, thermal, dynamic, light-induced and/or ozone-induced degradation [R1—SOmnR—SOp—R2.Type: GrantFiled: March 26, 2002Date of Patent: January 9, 2007Assignee: Ciba Specialty Chemicals CorporationInventors: Hans-Rudolf Meier, Gerrit Knobloch, Pierre Rota-Graziosi, Samuel Evans, Paul Dubs, Michèle Gerster
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Patent number: 6943220Abstract: This invention relates to a composition comprising (A) an ethylene-?-olefin having 3 to 20 carbon atoms-non-conjugated polyene copolymer, (B) a specific fine-powdered silicic acid and/or a silicate having a specific surface area of 5 to 500 m2/g (BET adsorption amount: ISO 5794/1, Annex D), (C) at least one kind of ?,?-unsaturated carboxylic acid metal salts, (D) an organic peroxide, further optionally (E) one antioxidant selected from sulfur-containing antioxidants, phenolic antioxidants and amine antioxidants, and/or (F) sulfur, and this invention relates to a rubber product obtainable by crosslinking the above composition.Type: GrantFiled: March 25, 2002Date of Patent: September 13, 2005Assignee: Mitsui Chemicals, Inc.Inventors: Shinya Matsunaga, Shuichi Nonaka, Hidenari Nakahama, Masaaki Kawasaki
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Patent number: 6916888Abstract: A rubber composition comprising a vulcanizable rubber, a reinforcing filler, a softening agent, and other reagents for rubber to which is added in a specific amount of a sulfur compound having the formula (I): —(SxR1)n—??(I) wherein R1 represents an organic group, x is a number of 3 to 5 on average, and n is an integer of 1 to 100, or a specific sulfur compound (1) and sulfur (2), and optionally a thiazole base, sulfenamide base, thiuram base, and/or diothio acid base vulcanization accelerator (3).Type: GrantFiled: December 23, 2002Date of Patent: July 12, 2005Assignee: The Yokohama Rubber Co., Ltd.Inventors: Fumito Yatsuyanagi, Kazunori Ishikawa, Shuichi Fukutani
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Patent number: 6841620Abstract: The present invention includes a composition comprising a coupled impact propylene copolymer. Preferably, the coupled impact propylene copolymer has an elastomeric phase that is present in an amount of at least 9 weight percent of the coupled propylene copolymer. Articles formed from the coupled propylene copolymer exhibit improved directionally balanced impact properties as compared with articles formed form comparable noncoupled impact propylene copolymers and also exhibit improved ductile-to-brittle transition temperatures compared with comparable noncoupled impact propylene copolymers. The invention also includes methods for making the coupled impact propylene copolymers using coupling agents, preferably, poly(sulfonyl azides). The invention further includes articles of manufacture that are made from the coupled impact propylene copolymer of the invention.Type: GrantFiled: October 25, 2002Date of Patent: January 11, 2005Assignee: Dow Global Technologies Inc.Inventors: Patricia Ansems, H. Craig Silvis, Lisa S. Madenjian
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Patent number: 6825282Abstract: This invention relates to vulcanizable diene rubber compounds with a high capacity for the addition of sulfur to be varied while processing safety is maintained, for the production of improved rubber moldings, particularly tire components.Type: GrantFiled: May 19, 2000Date of Patent: November 30, 2004Assignee: Bayer AktiengesellschaftInventors: Winfried Jeske, Hartmuth Buding, Hermann-Josef Weidenhaupt
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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: 6747099Abstract: Compositions are disclosed which comprise mixtures of at least one compound selected from silicone elastomers, bis-, tri- or higher polymaleimides and/or bis-, tri- or higher polycitraconimides, and at least one compound selected from p-phenylene-diamine based antiozonants, sulfur compounds capable of accelerating sulfur vulcanization of polymers capable of being crosslinked by sulfur and polysulfide polymers which when compounded into polymers curable by free radical initiators in the presence of free radical initiators permit substantially tack free surface cure of the polymers by decomposition of the free radical initiator in the presence of molecular oxygen. Compositions containing the above ingredients and at least one free radical initiator, curable compositions containing the combination and processes for making and using the compositions are also disclosed.Type: GrantFiled: June 26, 2001Date of Patent: June 8, 2004Assignee: ATOFINA Chemicals, Inc.Inventors: Michael F. Novits, Leonard H. Palys, Gary J. Gullo
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Publication number: 20040006179Abstract: A cured elastomeric rubber composition with a reduced coefficient of friction and a relatively high surface energy is disclosed. The composition comprises an elastomeric rubber with polar functional groups grafted to the polymer backbone. The polar functional groups can include amide, amine urethane, ester or silane functional groups. The elastomeric rubber may be any relatively non-polar elastomeric rubber such as EPDM or polyisoprene. Also incorporated into the rubber composition are various rubber additives including for example, carbon black, processing oils, curatives, and clay filler. The incorporation of various functional groups in the rubber compositions effectively reduces the coefficient of friction of the resulting cured rubber component.Type: ApplicationFiled: July 1, 2002Publication date: January 8, 2004Applicant: Cooper Technology Services LLCInventor: Hans-Joachim Graf
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Publication number: 20030204026Abstract: A rubber composition comprising a vulcanizable rubber, a reinforcing filler, a softening agent, and other reagents for rubber to which is added in a specific amount of a sulfur compound having the formula (I):Type: ApplicationFiled: December 23, 2002Publication date: October 30, 2003Applicant: The Yokohama Rubber Co., Ltd.Inventors: Fumito Yatsuyanagi, Kazunori Ishikawa, Shuichi Fukutani
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Publication number: 20030195302Abstract: A rubber composition comprising a vulcanizable rubber, a reinforcing filler, a softening agent, and other reagents for rubber to which is added in a specific amount of a sulfur compound having the formula (I):Type: ApplicationFiled: December 23, 2002Publication date: October 16, 2003Applicant: The Yokohama Rubber Co., LtdInventors: Fumito Yatsuyanagi, Kazunori Ishikawa, Shuichi Fukutani
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Patent number: 6620875Abstract: A rubber composition is disclosed wherein the rubber composition contains at least (a) a rubber component; (b) a silica filler; (c) a coupling agent; (d) a cure-enhancing amount of at least one polyalkylene oxide; and (e) at least one high molecular weight thiuram disulfide. The compositions may also include suitable amounts of other ingredients such as carbon black, antiozonants, antioxidants, etc.Type: GrantFiled: September 4, 2001Date of Patent: September 16, 2003Assignee: Uniroyal Chemical Company, Inc.Inventors: Sung W. Hong, Martin J. Hannon, Peter K. Greene
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Patent number: 6593432Abstract: A sulfur vulcanizing system rubber composition comprises EPDM, zinc as a vulcanization accelerator activator, at least one thiazole type vulcanization accelerator serving to control the dissolution of zinc from the composition, and at least one ultra-accelerator of the thiuram or dithiocarbamate type, these accelerators being preferably combined under specified quantitative limitations. The hose using this rubber composition is particularly suitable for use in a cooling system for an automobile engine, since the dissolution of zinc into a coolant is prevented, thereby preventing the formation of any zinc compound causing the blocking of the hose, or the leakage of the coolant through the seal between the hose and any pipe connected therewith.Type: GrantFiled: July 27, 2000Date of Patent: July 15, 2003Assignee: Tokai Rubber Industries, Ltd.Inventors: Ayumu Ikemoto, Eiichi Daikai, Koji Senda
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Publication number: 20030119995Abstract: A rubber composition is disclosed wherein the rubber composition contains at least (a) a rubber component; (b) a silica filler; (c) a coupling agent; (d) a cure-enhancing amount of at least one polyalkylene oxide; and (e) at least one high molecular weight thiuram disulfide. The compositions may also include suitable amounts of other ingredients such as carbon black, antiozonants, antioxidants, etc.Type: ApplicationFiled: September 4, 2001Publication date: June 26, 2003Inventors: Sung W. Hong, Martin J. Hannon, Peter K. Greene
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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: 6518367Abstract: A rubber composition comprising a vulcanizable rubber, a reinforcing filler, a softening agent, and other reagents for rubber to which is added in a specific amount of a sulfur compound having the formula (I): —(SxR1)n— (I) wherein R1 represents an organic group, x is a number of 3 to 5 on average, and n is an integer of 1 to 100, or a specific sulfur compound (1) and sulfur (2), and optionally a thiazole base, sulfenamide base, thiuram base, and/or diothio acid base vulcanization accelerator (3).Type: GrantFiled: February 15, 2000Date of Patent: February 11, 2003Assignee: The Yokohama Rubber Co., Ltd.Inventors: Fumito Yatsuyanagi, Kazunori Ishikawa, Shuichi Fukutani
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Patent number: 6506848Abstract: The present invention includes a process of preparing a coupled polymer comprising heating an admixture containing (1) at least one elastomer comprising ethylene and at least one comonomer which is selected from alpha olefins having at least 3 carbon atoms, dienes and combinations thereof and (2) a coupling amount at least one poly(sulfonyl azide) to at least the decomposition temperature of the poly(sulfonyl azide) for a period sufficient for decomposition of at least 80 weight percent of the poly(sulfonyl azide) and sufficient to result in a coupled polymer having a gel content of less than 2 weight percent. The invention includes compositions comprising the reaction product formed by the inventive process. The invention additionally includes articles which comprise a composition of the invention particularly when the article is formed from a melt of the composition.Type: GrantFiled: October 29, 2001Date of Patent: January 14, 2003Assignee: The Dow Chemical CompanyInventors: Wendy D. Hoenig, Teresa Karjala, Che-I Kao, Clark H. Cummins, Michael J. Mullins, H. Craig Silvis, Thoi H. Ho
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Patent number: 6500508Abstract: A flame-retardant resin composition for insulated wires, shielded wires and insulating tubes which are used in the field requiring high-frequency current transmission, for example, in the field of high-density wiring of internal circuits in electronic appliances. The composition comprises (a) a thermoplastic polyolefinic resin having a density of smaller than 0.89 g/cm3, which is prepared by copolymerizing ethylene and a non-polar &agr;-olefin in the presence of a single-site metallocene catalyst, (b) a halogen-containing flame retardant, and (c) zinc oxide. After crosslinking, the composition is used in forming an insulating coating for insulated wires and shielded wires, and in forming insulating tubes.Type: GrantFiled: February 12, 2001Date of Patent: December 31, 2002Assignee: Sumitomo Electric Fine Polymer, Inc.Inventors: Hiroshi Hayami, Yumi Kawabata, Satoshi Ebina
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Patent number: 6492454Abstract: A rubber composition having high adhesiveness to a metal, high modulus, high set resistance and high heat resistance, comprising raw material rubber, 2,4-dimercapto-6-substituted-1,3,5-triazine and a polymer having epoxy groups crosslinkable with the raw material rubber; a process for producing the rubber composition exhibiting adhesion stability, by controlling temperature of mixing step when crosslinking the rubber composition with an organic crosslinking agent; and a hose having excellent heat resistance and sufficient modulus and compression set resistance, wherein an inner tube and/or outer cover comprise the rubber composition and a reinforcing layer comprises brass-plated steel wires.Type: GrantFiled: March 31, 2000Date of Patent: December 10, 2002Assignee: The Yokohama Rubber Co., Ltd.Inventors: Osamu Ozawa, Tomoji Saitoh
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Publication number: 20020156201Abstract: The present invention relates to titanium and zirconium compounds of the formulaeType: ApplicationFiled: June 17, 2002Publication date: October 24, 2002Applicant: The Goodyear Tire & Rubber CompanyInventors: Giorgio Agostini, Mario Corigliano, Uwe Ernst Frank
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Publication number: 20020123573Abstract: Polymers coupled by reaction with coupling agents according to the practice of the invention advantageously have at least one of these desirable properties and preferably have desirable combinations of these properties. The present invention includes a process of preparing a coupled polymer comprising heating an admixture containing (1) at least one elastomer comprising ethylene and at least one comonomer which is selected from alpha olefins having at least 3 carbon atoms, dienes and combinations thereof and (2) a coupling amount at least one poly(sulfonyl azide) to at least the decomposition temperature of the poly(sulfonyl azide) for a period sufficient for decomposition of at least about 80 weight percent of the poly(sulfonyl azide) and sufficient to result in a coupled polymer having a gel content of less than about 2 weight percent.Type: ApplicationFiled: October 29, 2001Publication date: September 5, 2002Inventors: Wendy D. Hoenig, Teresa Karjala, Che-I Kao, Clark H. Cummins, Michael J. Mullins, H. Craig Silvis, Thoi H. Ho
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Patent number: 6417286Abstract: The present invention relates to titanium and zirconium compounds of the formulae (R1—O&Parenclosest;yX&Parenopenst;O—R2—W)z I wherein each R1 is independently selected from the group consisting of alkyl radicals having from 1 to 8 carbon atoms; R2 is a divalent radical selected from the group consisting of alkylenes having 1 to 15 carbon atoms, arylene and alkyl substituted arylene groups having 6 to 10 carbon atoms; W is an epoxy group; and y is an integer of from 1 to 3, z is an integer of from 1 to 3 and the sum of y and z equals 4; and X is titanium or zirconium.Type: GrantFiled: July 25, 2000Date of Patent: July 9, 2002Assignee: The Goodyear Tire & Rubber CompanyInventors: Giorgio Agostini, Mario Corigliano, Uwe Ernst Frank
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Publication number: 20020061979Abstract: 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: ApplicationFiled: April 7, 1995Publication date: May 23, 2002Inventors: SIEGFRIED WOLFF, RAINER PANENKA, MARINUS HADDEMAN, HIDENARI NAKAHAMA
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Publication number: 20020058760Abstract: This invention relates to vulcanizable diene rubber compounds with a high capacity for the addition of sulfur to be varied while processing safety is maintained, for the production of improved rubber moldings, particularly tire components.Type: ApplicationFiled: May 19, 2000Publication date: May 16, 2002Inventors: Winfried Jeske, Hartmuth Buding, Hermann-Josef Weidenhaupt
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Patent number: 6346577Abstract: The heat-resistant rubber composition of the invention is a vulcanizable composition comprising 100 parts by weight of a specific ethylene-&agr;-olefin-nonconjugated polyene copolymer rubber (A) composed of ethylene, an &agr;-olefin or 3 to 20 carbon atoms and a nonconjugated polyene which is a vinyl end group-containing norbornene compound, 0.2 to 5 parts by weight of an amine type anti-aging agent (C) and/or a hindered phenol type anti-aging agent (D), 1 to 10 parts by weight of a sulfur type anti-aging agent (E) and an organic peroxide (B). This heat-resistant rubber composition can provide a vulcanized rubber molded product showing not only excellent mechanical properties and electrical properties and but also prominently high thermal aging resistance.Type: GrantFiled: February 28, 2000Date of Patent: February 12, 2002Assignee: Mitsui Chemicals INCInventors: Takashi Hakuta, Tetsuo Tojo, Masaaki Kawasaki, Mikio Hosoya
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Publication number: 20020010283Abstract: The present invention is a rubber composition comprising 0.Type: ApplicationFiled: January 13, 1998Publication date: January 24, 2002Inventor: MASAHIRO HOJO
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Patent number: 6313206Abstract: The present invention relates to titanate compounds of the formula wherein R is selected from the group consisting of alkylene groups having from 1 to 15 carbon atoms and arylene and alkyl substituted arylene groups having from 6 to 10 carbon atoms and x is an integer of from 2 to 8.Type: GrantFiled: October 1, 1999Date of Patent: November 6, 2001Assignee: The Goodyear Tire & Rubber CompanyInventors: Edward John Blok, Lawson Gibson Wideman, Paul Harry Sandstrom, Mark Leslie Kralevich, Jr.
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Patent number: RE37527Abstract: A heat-resistant rubber composition of the invention is a vulcanizable composition comprising a specific ethylene-&agr;-olefin-nonconjugated polyene copolymer rubber (A) and an organic peroxide (B). This heat-resistant composition has high crosslinking efficiency given by the organic peroxide and high modulus, and can provide a vulcanized rubber molded product of excellent resistance to environmental deterioration such as thermal aging resistance. The other heat-resistant rubber composition of the invention is a vulcanizable composition comprising 100 parts by weight of a specific ethylene-&agr;-olefin-nonconjugated polyene copolymer rubber (A) composed of ethylene, an &agr;-olefin or 3 to 20 carbon atoms and a nonconjugated polyene which is a vinyl end group-containing norbornene compound, 0.2 to 5 parts by weight of an amine type anti-aging agent (C) and/or a hindered phenol type anti-aging agent (D), 1 to 10 parts by weight of a sulfur type anti-aging agent (E) and an organic peroxide (B).Type: GrantFiled: March 29, 2000Date of Patent: January 22, 2002Assignee: Mitsu ChemicalsInventors: Takashi Hakuta, Tetsuo Tojo, Masaaki Kawasaki, Mikio Hosoya