Abstract: This application relates to an ethylene polymer having a weight average molecular weight of at least 120,000 including 1-50 tertiary double bonds per 10,000 carbon atoms.
Type:
Application
Filed:
October 11, 2007
Publication date:
November 4, 2010
Applicant:
BOREALIS TECHNOLOGY OY
Inventors:
Ariid Follestad, Petar Doshev, Anne Britt Bjaland, Bernt-Ake Sultan, Magnus Palmlof, Morten Lundquist
Abstract: The present invention is directed to a catalyst system for synthesizing rubbery polymers, such as polybutadiene rubber, styrene-butadiene rubber, isoprene-butadiene rubber, or styrene-isoprene-butadiene rubber, that are amine functionalized and have a high trans or high vinyl microstructure. The catalyst system, in one embodiment, includes an organolithium amine compound, and one or more of (a) a group IIa metal salt of an amino glycol or a glycol ether, (b) an organoaluminum compound, or (c) an amine compound. The amine 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.
Abstract: The present invention discloses a process for synthesizing a hydrogenated polymer that comprises: (1) preparing a aqueous polymerization medium which is comprised of (a) at least one monomer, (b) a polymerization control agent, and an emulsifier, wherein the emulsifier is prepared in-situ within the aqueous polymerization medium; (2) initiating polymerization of said monomer within the aqueous polymerization medium to produce a latex of an unsaturated polymer; (3) treating the latex of the unsaturated polymer with (a) an oxidant selected from the group consisting of oxygen, air and hydroperoxides; (b) a reducing agent selected from the group consisting of hydrazine and hydrates of hydrazine; and (c) a metal ion activator to produce the hydrogenated polymer.
Type:
Grant
Filed:
October 9, 2007
Date of Patent:
October 12, 2010
Assignee:
The Goodyear Tire & Rubber Company
Inventors:
Dane Kenton Parker, Frank James Feher, Viswanath Mahadevan
Abstract: A catalyst for polymerization of conjugated diene comprises (A) an yttrium compound; (B) an ionic compound including a non-coordinate anion and a cation; and (C) an organometallic compound including an element selected from the groups 2, 12 and 13 of the periodic table.
Abstract: A flower-like nano-particle composition including a poly(alkenylbenzene) core and a poly(conjugated diene) or a poly(alkylene) surface layer is provided. The nano-particles have a mean average diameter less than about 100 nm and are substantially free of chain ends. The nano-particles can be modified via, for example, hydrogenation. The nano-particles can advantageously be incorporated into rubbers, elastomers, and thermoplastics.
Type:
Grant
Filed:
April 9, 2007
Date of Patent:
August 31, 2010
Assignee:
Bridgestone Corporation
Inventors:
Xiaorong Wang, Yoichi Ozawa, James E. Hall
Abstract: Isobutene, isoprene, and butadiene are obtained from mixtures of C4 and/or C5 olefins by dehydrogenation. The C4 and/or C5 olefins can be obtained by dehydration of C4 and C5 alcohols, for example, renewable C4 and C5 alcohols prepared from biomass by thermochemical or fermentation processes. Isoprene or butadiene can be polymerized to form polymers such as polyisoprene, polybutadiene, synthetic rubbers such as butyl rubber, etc. in addition, butadiene can be converted to monomers such as methyl methacrylate, adipic acid, adiponitrile, 1,4-butadiene, etc. which can then be polymerized to form nylons, polyesters, polymethylmethacrylate etc.
Type:
Application
Filed:
February 24, 2010
Publication date:
August 26, 2010
Inventors:
Matthew W. Peters, Joshua D. Taylor, Leo E. Manzer, David E. Henton
Abstract: [Problems] Thermoplastic resins have various problems such as enhancement in strength and improvement in toughness and heat resistance and copolymerization with monomers or oligomers and grafting have been carried out to solve the problems. Although graft polymerization with macromonomers has been carried out as a method for solving the problems, it is still expected to develop a modification technique for attaining better performance and resins produced by the technique. [Means for Solving Problems] A thermoplastic resin obtained by addition polymerization of an addition-polymerizable monomer, characterized by being modified by copolymerization with a vinyl polymer (I) which bears at least one group having a polymerizable carbon-carbon double bond at each of at least two molecular ends and which has a weight-average molecular weight (Mw)/number-average molecular weight (Mn) ratio of less than 1.8.
Abstract: A polymer composition includes a rubber modified aromatic vinyl resin and a cyclic alkyl phosphate compound. In some embodiments, the cyclic alkyl phosphate compound is able to impart good flame retardancy to the composition, while maintaining a good balance of the other physical and mechanical properties of the resin including Vicat Softening Temperature and impact strength.
Type:
Grant
Filed:
February 6, 2006
Date of Patent:
August 24, 2010
Assignee:
Cheil Industries Inc.
Inventors:
Young Sik Ryu, Sang Hyun Hong, Sung Hee Ahn, Jae Ho Yang, Su Hak Bae, Soon Young Jin
Abstract: A polymer composition includes a rubber modified vinyl resin, a cyclic alkyl phosphate compound, and an aromatic phosphate ester. Some embodiments may additionally comprises a polyphenylene ether resin. In some embodiments, the compositions have good flame retardancy, color stability, impact resistance, and thermal stability.
Type:
Grant
Filed:
February 14, 2006
Date of Patent:
August 24, 2010
Assignee:
Cheil Industries Inc.
Inventors:
Su Hak Bae, Jae Ho Yang, Sang Hyun Hong
Abstract: A polymer composition includes a substantially transparent, rubber modified aromatic vinyl resin and a cyclic alkyl phosphate compound. In some embodiments, the cyclic alkyl phosphate compound is able to impart good flame retardancy, while maintaining a good balance of the other physical and mechanical properties of the resin including the transparency and impact strength of the resin.
Type:
Grant
Filed:
February 14, 2006
Date of Patent:
August 24, 2010
Assignee:
Cheil Industries Inc.
Inventors:
Sang Hyun Hong, Sung Hee Ahn, Young Sik Ryu, Tae Uk Kim
Abstract: A rotor/stator apparatus is proposed, with a bearing block, a casing (1), a rotor shaft mounted therein, on whose end directed toward the casing a rotor designed with a conical surface has been secured, there being a stator (2) secured within the casing and concentrically associated with the rotor, where those surfaces that face toward one another of the rotor (2) and of the stator (3) form a gap upstream of which there is an axial feed neck and downstream of which there is a radial outlet neck, where rotor and stator have been mounted so as to be capable of axial shift in order to form a gap with adjustable gap width, wherein one or more holes extending to the exterior has/have been provided in the region of the feed aperture of the rotor/stator apparatus in the feed line prior to and very close to the rotor/stator apparatus and/or in the casing (1) and/or in the stator (2), and alongside the outlet aperture at least one further hole has been provided in the annular space around the shear gap.
Type:
Application
Filed:
February 8, 2006
Publication date:
August 19, 2010
Applicant:
BASF AKTIENGESELLSCHAFT
Inventors:
Norbert Güntherberg, Wolfgang Fischer, Manfred Radulla
Abstract: An antivibration rubber composition containing diene rubber (Component A) and silica (Component B). The amount of the Component B contained is set to a range from 10 to 100 parts by weight with respect to 100 parts by weight of the Component A. The Component B has the following properties, i.e., a surface silanol-group density of not less than 3.0 groups/nm2 as determined by the Sears titration method, an average particle size of not more than 10 ?m, and a BET specific surface area of 15 to 60 m2/g.
Abstract: The thermoplastic ABS resin composition according to the present invention comprises (a) 2 to 25 parts by weight of a graft copolymer particle containing rubbers having a volume average particle diameter range from 0.05 ?m to less than 0.18 ?m; (b) 2 to 25 parts by weight of a graft copolymer particle containing rubbers having a volume average particle diameter range from 0.18 ?m to less than 0.4 ?m; (c) 2 to 18 parts by weight of a graft copolymer particle containing rubbers having a volume average particle diameter range from 0.4 ?m to less than 4 ?m; (d) 10 to 70 parts by weight of a branched vinyl cyanide-vinyl aromatic copolymer; and (e) 1 to 60 parts by weight of a long-chain linear vinyl cyanide-vinyl aromatic copolymer.
Abstract: Disclosed herein is a method of forming a polymer, wherein the polymer is formed by a radical polymerisation reaction initiated by a solid oxide compound.
Type:
Application
Filed:
June 27, 2008
Publication date:
August 12, 2010
Inventors:
Rebecca Lesic, Thomas Maschmeyer, Anthony Frederick Masters, Antony John Ward
Abstract: This invention provides a polybutadiene capable of improving wear resistance and resistance to crack growth in a rubber composition and a tire, wherein values of e, f and g derived from the following determinant (I): ( 1.7455 0 - 0.0151 - 0.0454 0.4292 - 0.0129 - 0.007 0 0.3746 ) ? ( log 10 ? ( a / d ) log 10 ? ( a / b ) log 10 ? ( a / c ) ) = ( e f g ) ( I ) (wherein a is a mountain peak value around 1130 cm?1 in a transmittance spectrum through Fourier transform infrared spectroscopy (FT-IR), and b is a valley peak value around 967 cm?1, and c is a valley peak value around 911 cm?1, and d is a valley peak value around 736 cm?1) satisfy relationships of equation (II): (Calculated value of cis-1,4 bond)=e/(e+f+g)×100?99 and equation (III): (Calculated value of vinyl bond)=g/(e+f+g)×100?0.
Abstract: The present invention relates to a linear or branched diene elastomer having cyclic vinyl units. A linear diene elastomer according to the invention results from at least one conjugated diene and it comprises cyclic vinyl units in a mass content of greater than or equal to 15% while having a number-average molecular weight falling within a range of from 10,000 to 300,000 g/mol.
Abstract: nuc-PP nanocomposite is made from the mixing of nuc-PP with olefin elastomer and organoclay, and optionally, a dispersion agent. Unexpectedly, processing properties such as higher melt flow, and performance properties such as higher toughness and higher stiffness, are obtained when compared with commercially available PP nanocomposite.
Type:
Grant
Filed:
March 5, 2007
Date of Patent:
July 27, 2010
Assignees:
Polyone Corporation, AMCOL International Corporation
Abstract: Radically coupled PTFE polymer compounds useful, for example, as tribo materials, and a method for the production thereof. Radically coupled PTFE polymer compounds are provided which exhibit improved wear resistances with comparable gliding properties, and furthermore there is provided a simple and efficient method for the production of such compounds. Radically coupled PTFE polymer compounds are provided comprising radiation-chemically and/or plasma-chemically modified PTFE powders, on the particle surface of which olefinically unsaturated polymers are chemically radically coupled by a reactive conversion into a melt. There is also provided a method for producing radically coupled PTFE polymer compounds, in which PTFE powders are reactively converted with reactive perfluoroalkyl-(peroxy) radical centers after a radiation-chemical and/or plasma-chemical modification into a melt with the addition of olefinically unsaturated polymers.
Abstract: Provided herein are compositions comprising a polyfarnesene. The polyfarnesene can be a farnesene homopolymer derived from a farnesene (e.g., ?-farnesene or ?-farnesene) or a farnesene interpolymer derived from a farnesene and at least a vinyl monomer. In some embodiments, the at least one vinyl monomer is ethylene, an ?-olefin such as styrene, or a substituted or unsubstituted vinyl halide, vinyl ether, acrylonitrile, acrylic ester, methacrylic ester, acrylamide or methacrylamide, or a combination thereof.
Abstract: It has been determined that the important factors necessary for self-healing polymers include: good impact strength, control of the degree of crystallinity, low melting point (for materials shot at approximately 25° C.), and the ability to melt flow. Polymeric structures fabricated from suitable self-healing polymeric materials are also described.
Abstract: A vinyl.cis-polybutadiene rubber is provided containing 1,2-polybutadiene and a polymer substance of a melting point lower than that of the 1,2-polybutadiene and with at least one unsaturated double bond per repeating unit, where the 1,2-polybutadiene and the polymer substance are dispersed at physically and/or chemically adsorbed states in the cis-polybutadiene rubber as the matrix component of the vinyl.cis-polybutadiene rubber, and a method for producing the same, to provide a vulcanized product exerting a small die swell ratio and excellent extrusion processability and operability, as well as very great characteristics demanded for the side tread of tire and the like.
Abstract: A particulate rubber composition includes a plurality of rubber particles. At least some of the rubber particles have tensile fractured surfaces. The particulate rubber composition is produced by a method that includes disintegrating a cross-linked rubber product to form the rubber particles using a high-speed jets fluid to impinge the cross-linked rubber product. The high-speed jets fluid has a Reynold's number that ranges from 100,000 to 4,000,000. A product including a polymeric matrix material and the particulate rubber composition is also disclosed.
Abstract: An organosilicon compound having a structure represented by following general formula: R1: methyl group or ethyl group, R2: a branched or linear, saturated or unsaturated aliphatic hydrocarbon group having 3 to 8 carbon atoms, n: 0.5˜2.5 (an average composition), R3: a divalent hydrocarbon group of —CH2—, —CH2CH2—, —CH2CH2CH2—, —CH2CH2CH2CH2—, —CH2CH2CH2CH2CH2—, —CH(CH3)—, —CH2CH(CH3)—, —C(CH3)2—, —CH(C2H5)—, —CH2CH2CH(CH3)— or —CH2CH(CH3)CH2—, X: S, S(C?O)—R4, SH or NH(3?p), and R4: a branched or linear, saturated or unsaturated aliphatic hydrocarbon group having 1 to 30 carbon atoms. When X?S, p=2 and m=1˜10. When X?S(C?O)—R4, p=1 and m=1. When X?SH, p=1 and m=1. When X?NH(3?p), p=1˜3 and m=1. The organosilicon compound simultaneously suppresses discharge of volatile alcohols generated during the reaction with an inorganic filler and exhibits great reactivity with the inorganic filler.
Abstract: The invention relates to a method of preparing statistical microgels. The inventive method comprises a step involving the radical polymerisation of a composition containing: at least one monoethylenically-unsaturated monomer, at least one multiethylenically-unsaturated monomer, a free radical source and a control agent. The invention also relates to first generation microgels thus prepared and all the compounds resulting from said microgels (next-generation microgels).
Type:
Grant
Filed:
July 21, 2003
Date of Patent:
June 1, 2010
Assignee:
Rhodia Operations
Inventors:
Mathias Destarac, Bruno Bavouzet, Daniel Taton
Abstract: A polymer composition includes a rubber-modified aromatic vinyl resin and a cyclic phosphonate ester compound. Embodiments of the composition demonstrate good impact strength, flame retardancy, heat resistance. Some embodiments additionally demonstrate moisture resistance and low heat sag. A shaped article and an electronic device can be made from the flame retardant polymer composition.
Type:
Grant
Filed:
November 17, 2006
Date of Patent:
May 25, 2010
Assignee:
Cheil Industries, Inc.
Inventors:
Jeong Hwan Ku, Sang Hyun Hong, Su Hak Bae, Jin Hwan Choi
Abstract: A building or construction material comprises a fluorinated polymer system. The fluorinated polymer system is heat weldable and waterproofing, which shows improved adhesion properties and has a wide range of applications in building and construction industries.
Abstract: An anionic polymerizable monomer is added to a reaction system in which an anion species which is incapable of initiating polymerization but may react with polymerization inhibiting substances to convert them into compounds that do not inhibit polymerization is present, and then an anion species capable of initiating polymerization is added thereto. It becomes possible to produce high molecular weight polymers and to precisely control the molecular weight thereof even if polymerization inhibiting substances are present in the system or when polymerization inhibiting substances enter from outside.
Abstract: A cleaning blade, for use in an image-forming apparatus, formed by a molded resin composition containing a rubber component consisting of a thermosetting elastomer containing acrylonitrile as a constituent monomer thereof and having a bound acrylonitrile amount of 15 to 50%.
Abstract: An eraser composition for de-flakes is disclosed. The composition comprises (i) a SEBS copolymer (styrene-ethylene-butylene-styrene) and SBS copolymer (styrene-butadiene-styrene) and TPE styrene, and the weight percentage being 10 to 35%; (ii) organic fillers of sodium carbonate, and pearl powder, and the weight percentage being about 30 to 60%; (iii) paraffin oil, and of a weight percentage of about 35 to 55%; (iv) palm oil, jojoba oil, linolein oil, moisturizer, deep cleanser, and olive oil, and a weight percentage of 5 to 15%; and (v) edible food pigments, or edible colorants, and the weight percentage of 0.1 to 0.5%.
Abstract: Accelerator composition for a rubber latex derived from a conjugated diene and optionally a vinyl aromatic comonomer comprising: (i) a diethyl dithiocarbamate (like e.g. ZDEC), and (ii) diphenylguanidine (DPG), and substantially free of any thiazole derivative, a curable aqueous synthetic rubber latex composition comprising said accelerator composition, and a process for the water-based solvent-free manufacture of synthetic shaped synthetic elastomeric articles, prepared by using said accelerator composition.
Abstract: The present invention generally relates to the use of EPDM (ethylene-propylene diene monomer) polymer compounds used in place of NR (natural rubber), SBR (styrene butadiene rubber), polyisoprene and other polymers in energy absorption elastomeric systems. In one embodiment a method of continuously manufacturing an EPDM based compound cured via a peroxide based cure system and used in an energy absorption elastomeric system is disclosed. The method includes the steps of forming a continuous part from a compound based on ethylene-propylene diene terpolymer and then curing the part via a continuous process and optionally cutting the final part to the appropriate length. Various advantages are achieved via the use of peroxide cured EPDM as replacements for NR, SBR, polyisoprene and other polymers.
Abstract: A formable curable elastomer composition comprising a dispersion of a cured organic elastomer, such as EPDM, butyl rubber and hydrogenated nitrile butyl rubber, is provided in an uncured silicone elastomer. The organic elastomer is cured by a phenol-formaldehyde resin. These compositions can generally be used in applications where silicone rubber is used, and in particular where the cured rubber is liable to be exposed to temperatures of 150-200° C. Examples of such uses include tyre bladders used in the moulding of tyres, spark plug boots for internal combustion engines, wire and cable coatings designed to be used at high temperatures and ceramifiable wire and cable coatings used in safety critical applications such as emergency lighting systems.
Abstract: The present invention relates to a process for producing a modified polymer, comprising modifying a polymer having an active site of an organometal type in a molecule by reacting the site thereof with a hydrocarbyloxysilane compound and adding a condensation accelerator to the reaction system in the middle of the above reaction and/or after completion thereof and a rubber composition comprising the modified polymer obtained by the process described above, preferably a rubber composition comprising 100 parts by weight of (A) a rubber component containing at least 30% by weight of the above modified polymer and 10 to 100 parts by weight of (B) silica and/or carbon black.
Abstract: A conjugated diene polymer is provided that comprises a conjugated diene-based constituent unit and a constituent unit of formula (I) below, at least one terminus of the polymer being modified by a compound having a linkage of formula (II) below. wherein X1, X2, and X3 independently denote a group as defined in the specification.
Abstract: A conjugated diene polymer is provided that comprises a conjugated diene-based constituent unit and a constituent unit of formula (I), at least one terminus of the polymer being modified by a compound having a linkage of formula (II): wherein X1, X2, and X3 independently denote a group as defined in the specification. wherein p denotes 0 or 1, T denotes a group as defined in the specification.
Abstract: This invention provides a thermally curable resin copolymer (A), composed mainly of an ethylenically unsaturated monomer (a-1), which produces an acid via decomposition at 150° C. or more, an ethylenically unsaturated monomer (a-2) containing an epoxy group copolymerizable with the ethylenically unsaturated monomer (a-1), and an ethylenically unsaturated monomer (a-3) having a reactive silyl group; a thermally curable resin composition including the thermally curable resin copolymer; a cured film formed from the composition; and a liquid crystal display including the cured film. The thermally curable resin composition has extended storage stability and can be formed into the cured film having good adhesion to a substrate.
Type:
Grant
Filed:
January 23, 2006
Date of Patent:
March 2, 2010
Assignee:
LG Chem. Ltd.
Inventors:
Dong Seok Kim, Seung Hee Lee, Sang Kyu Kwak, Yong Sik Ahn
Abstract: The invention relates to a coupling agent to provide the coupling of a metal element to a vulcanizable elastomeric material whereby the coupling agent provides both binding to the metal element and reaction with the vulcanizable elastomeric material. The coupling agent comprises a macromolecular backbone and at least one functional endgroup. The functional endgroup is responsible for the binding to the metal element. The backbone has a molecular weight ranging between 1000 and 10000 and has at least one unsaturated carbon-carbon bond for reacting with the vulcanizable elastomeric material. The invention further relates to an article comprising a metal element at least partially embedded in a vulcanizable elastomeric material and comprising a coupling agent to provide the coupling of the metal element to the vulcanizable elastomeric material.
Type:
Application
Filed:
February 21, 2008
Publication date:
February 25, 2010
Inventors:
Tom Baekelandt, Albert Somers, Nadine Van De Velde
Abstract: In an isoolefin-diolefin rubber production process (e.g. a butyl rubber production process), the cold rubber slurry produced in the reaction vessel is transported from the reaction vessel to the flash tank during which time the cold slurry may be expressed to separate at least part of the cold liquid reaction medium from the isoolefin-diolefin rubber. The separated cold liquid reaction medium is transported off stream, for example by a mechanical filter, where it can be recycled back into the reaction vessel and/or where it can be used to cool a feed stream or streams of the reaction components. The isoolefin-diolefin rubber and the residual liquid reaction medium are transported to a flash tank for further processing. The ability to separate and recycle cold liquid reaction medium makes the process more economical.
Abstract: A method for limiting the transmission of light through a material is disclosed. In the method, a layer composed of a hyperbranched polymer formed via a copolycyclotrimerization reaction is interposed between a light source and the material. Also provided is a method for emitting light comprising exciting the hyperbranched polymer. In addition, methods for limiting the transmission of light and for emitting light using hyperbranched polymers formed by homopolycyclotrimerization reactions are disclosed. A new class of hyperbranched polymers produced by copolycyclotrimerization is also disclosed.
Type:
Grant
Filed:
March 22, 2005
Date of Patent:
February 9, 2010
Assignee:
The Hong Kong University of Science and Technology
Inventors:
Ben Zhong Tang, Kaitian Xu, Han Peng, Qunhui Sun, Jingdong Luo
Abstract: The invention relates to novel air barriers made from elastomeric compositions. In particular, the invention relates to novel air barriers such as innerliners, air sleeves, and innertubes made from novel C4 to C7 isoolefin based polymers with new sequence distributions or that are substantially free of long chain branching.
Type:
Grant
Filed:
June 13, 2005
Date of Patent:
February 9, 2010
Assignee:
ExxonMobil Chemical Patents Inc.
Inventors:
Walter Harvey Waddell, David Yen-Lung Chung
Abstract: Disclosed herein is a release sheet including: a base material; and a release agent layer provided on the base material, wherein the release agent layer is formed by curing a material mainly constituted of a diene-based polymer and contains substantially no silicone compound, and wherein Mooney viscosity (ML1+4 (100° C.)) of the diene-based polymer before curing which is measured according to JIS K6300 at a temperature of 100° C. is in the range of 40 to 70. It is preferred that the material before curing is mainly constituted of one or two or more diene-based polymers having a cis-1,4 bond content of 90 to 99%.
Type:
Application
Filed:
September 21, 2007
Publication date:
January 28, 2010
Applicant:
Lintec Corporation
Inventors:
Sou Miyata, Takuo Nishida, Toshio Sugizaki
Abstract: Novel (co)polymeric structures having functional groups making possible, under conditions that are safe for human use, the formation of chemical bonds with human keratin, and in particular with the keratin present in hair, eyelashes and eyebrows, skin, nails, lips, the oral mucosa and tissues of the external genital organs are disclosed; the invention also relates to the synthesis of such (co)polymeric structures and the use thereof in the fields of cosmetics and medicine.
Abstract: The present invention provides novel, modified polydicyclopentadienes and methods to prepare modified polydicyclopentadienes. The modified polydicyclopentadienes prepared by the methods of the invention are useful in many applications including new and useful solid phases for chromatography.
Abstract: Novel crosslinkable compositions based on elastomers, at least one of which has carboxyl and/or carboxylate groups, are provided, these crosslinkable compositions containing special unsaturated organic salts of metal ions and a crosslinking system which acts as a free radical donor. Crosslinked elastomers which have excellent physical properties are obtainable therefrom. The novel crosslinkable compositions have a wide range of uses.
Type:
Grant
Filed:
September 25, 2006
Date of Patent:
January 12, 2010
Assignee:
LANXESS Deutschland GmbH
Inventors:
Dirk Achten, Claus Wrana, Christopher Ong, Martin Mezger, Hans Magg, Jürgen Ismeier, Hans-Rafael Winkelbach
Abstract: A process for preparing a polydiene, the process comprising the step of polymerizing conjugated diene monomer with a lanthanide-based catalyst system including the combination or reaction product of: (a) a lanthanide compound selected from the group consisting of lanthanide organophosphates, lanthanide organophosphonates, and lanthanide organophosphinates, (b) an alkylating agent, and (c) a chlorine-containing compound, where said step of polymerizing takes place within a polymerization mixture that includes less than 20% by weight of solvent based on the total weight of the polymerization mixture.
Type:
Application
Filed:
December 30, 2008
Publication date:
January 7, 2010
Inventors:
Steven LUO, Kevin McCauley, Jason T. Poulton
Abstract: This invention is based upon the discovered that crosslinked core-shell particles can be used as a filler in low cost emulsion styrene-butadiene rubber (ESBR) with excellent results being attained. In fact, such core-shell particle filled ESBR exhibits performance similar to silica filled solution styrene-butadiene rubber (SSBR) in terms of dynamic response, Payne effect, rebound and tan ? at 0° C. and 100° C. The utilization of such crosslinked core-shell particles in rubber compounds offers the additional advantage of weight reduction since the core-shell particles are significantly less dense than carbon black or silica fillers. The use of the crosslinked core-shell polymers of this invention in rubber formulations in place of silica also offers the advantage of not needing any expensive silane coupling agents to attain required levels of polymer/filler interaction. Accordingly, no silane coupling agent is used in the rubber compounds of this invention which leads to reduced cost.
Type:
Grant
Filed:
June 30, 2005
Date of Patent:
December 29, 2009
Assignee:
The Goodyear Tire & Rubber Company
Inventors:
Ping Zhang, Lei Zheng, Feng Anne Xie, Eric Sean Castner
Abstract: [Problem] To provide an oxygen absorbent and an oxygen-absorbing film that are excellent in oxygen absorption capability and do not generate an unpleasant odor component upon absorbing oxygen, whereby an unpleasant odor is not generated in a packaging container having them used therein, and an unpleasant odor is not diffused outward from the packaging container. [Means for Dissolution] An oxygen absorbent comprising a cyclized product of a conjugated diene polymer having a vinyl bond content in a conjugated diene monomer unit moiety of 4% by mol or less is provided. An oxygen-absorbing film comprising a cyclized product of a conjugated diene polymer having a vinyl bond content in a conjugated diene monomer unit moiety of 4% by mol or less, as an effective component is also provided. An oxygen-absorbing film further comprising a thermoplastic resin in addition to the oxygen absorbent is also provided.