| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 525232000 | Solid polymer derived from reactant containing at least two ethylenic groups and is devoid of aryl ring | 72 |
| 20090099314 | CROSSLINKED ELASTIC MATERIAL FORMED FROM A LINEAR BLOCK COPOLYMER - An elastic material for use in an absorbent article is provided. The elastic material contains a crosslinked network formed from a linear block copolymer having a monoalkenyl aromatic midblock positioned between conjugated diene endblocks (e.g., butadiene-styrene-butadiene (“B-S-B”) triblock copolymer). Prior to crosslinking, such linear block copolymers have a relatively low viscosity and thus may be readily formed into a precursor elastic material (e.g., film, strands, web, etc.) that is subsequently crosslinked to achieve the desired elastic and mechanical properties. Crosslinking is typically achieved through the formation of free radicals (unpaired electrons) that link together to form a plurality of carbon-carbon covalent bonds at the conjugated diene endblocks. | 04-16-2009 |
| 20090111945 | Soft Homogeneous Isotactic Polypropylene Compositions - Provided are homogeneous blend compositions comprising; a) from 1% to 99% by weight of the blend of a first polymer component comprising a copolymer of 5% to 35% by weight of the first polymer component consisting predominantly of alpha olefin derived units and 65% to 95% by weight of the first polymer component of propylene derived units having a crystallinity of 0.1% to about 25% from isotactic polypropylene sequences, a melting point of from 45° C. to 105° C., and wherein the Melt Flow Rate (MFR@230C) of the first polymer component is between 300 g/10 min to 5000 g/1 min. b) from 1% to 99% by weight of the blend of a second polymer component comprising isotactic polypropylene and random copolymers of isotactic propylene, wherein the percentage of the copolymerized alpha-olefin in the copolymer is between 0.0% and 9% by weight of the second polymer component and wherein the second polymer component has a melting point greater than about 110° C., wherein the first polymer component has less than 1000 ppm of reaction products arising from the chemical reaction of a molecular degradation agent. The provided compositions are useful in high temperature applications. | 04-30-2009 |
| 20090124761 | METHOD OF MANUFACTURING A GOLF BALL - The present invention relates to an industrially beneficial method of manufacturing golf balls which includes the steps of pre-preparing an inorganic filler masterbatch by mixing an inorganic filler with a rubber material, preparing a rubber composition that contains the rubber material by using the masterbatch, and employing a material obtained by molding the rubber composition under heat as a golf ball component. The masterbatch is composed of:
| 05-14-2009 |
| 20090156748 | Polyolefin Compositions Having Low Gloss - Polyolefin composition comprising, in percent by weight: A) 10-50% of a copolymer of propylene with one or more comonomer(s) selected from ethylene and CH | 06-18-2009 |
| 20090163666 | Polymer compositions exhibiting enhanced flow-induced crystallization - Provided is a polymer composition having a linear, semi-crystalline thermoplastic matrix polymer and a second thermoplastic polymer. The second polymer is a substantially saturated hydrocarbon polymer including (i) a backbone chain and (ii) one or more substantially hydrocarbon sidechains connected to the backbone chain. The sidechains each have a number-average molecular weight of from 2,500 g/mol to 125,000 g/mol and an MWD by SEC of 1.0 to 3.5. The mass ratio of sidechain molecular mass to backbone molecular mass is from 0.01:1 to 100:1. The matrix polymer is present at 95 wt % or more based on the weight of the composition. The second polymer is present at 0.2 to 5.0 wt % or more based on the weight of the composition. Provided is also a method for enhancing flow-induced crystallization in a linear, semi-crystalline thermoplastic matrix polymer. Provided is also a method for processing a polymer composition. | 06-25-2009 |
| 20090171029 | STYRENE-BASED POLYMER, STYRENE-BASED COPOLYMER, RUBBER COMPOSITION AND PNEUMATIC TIRE - This invention relates to a styrene-based (co)polymer capable of improving tan δ of a rubber composition while ensuring a fracture resistance of the rubber composition by adding to the rubber composition, and more particularly to a styrene-based polymer obtained by homopolymerizing a styrene derivative and having a weight average molecular weight as converted to polystyrene of 2×10 | 07-02-2009 |
| 20090176939 | SEEDED GROW-OUT RUBBER POLYMERIZATION PROCESS - The invention relates to a high productivity process for the production of rubber latex particles. This improved productivity process involves using a seeded grow-out process to prepare polybutadiene rubber latex. The use of a pre-formed seed latex reduces cycle time relative to an in situ polybutadiene seed process. It also provides better particle size control. The rubber latex particles can be used for impact modification of thermoplastic compositions. | 07-09-2009 |
| 20090281246 | PROCESS FOR THE PREPARATION OF HIGH IMPACT VINYLAROMATIC (CO)POLYMERS GRAFTED ON AN ELASTOMER - A process for the preparation of vinylaromatic (co)polymers grafted on an elastomer comprising a rigid matrix consisting of vinylaromatic polymers or copolymers and of an elastomeric phase dispersed in the matrix in form of particles with a strictly bimodal distribution which comprises the functionalization of a first elastomeric fraction by means of a catalytic system containing a stable free radical initiator and subsequently the polymerization of the thus obtained mixture also in presence of a second non functionalized elastomeric fraction. | 11-12-2009 |
| 20090312496 | Hydroxyl-Terminated Thiocarbonate Containing Compounds, Polymers, and Copolymers, and Polyurethanes and Urethane Acrylics Made Therefrom - Carboxylate terminated thiocarbonates are reacted with a polyfunctional alcohol to form a hydroxyl-terminated thiocarbonate compound. | 12-17-2009 |
| 20100004400 | METHOD FOR PRODUCING OLEFINIC THERMOPLASTIC ELASTOMER - A method for producing an olefinic thermoplastic elastomer comprising mixing 100 parts by weight of an olefin copolymer rubber (A) obtained by polymerizing ethylene, an α-olefin having 3 to 20 carbon atoms and a non-conjugated polyene, and based on 100 parts by weight of the olefin copolymer rubber (A), 11 to 50 parts by weight of a volatile organic solvent (B) and 5 to 150 parts by weight of an olefin resin (C), and removing from the mixture the volatile organic solvent (B) while kneading in an extruder. | 01-07-2010 |
| 20100113703 | RUBBER COMPOSITION AND TIRE USING THE SAME - This invention relates to a rubber composition capable of using in a tread rubber of a tire to improve both an initial gripping performance and a running stability of the tire as compared with those of conventional tires, and more particularly to a rubber composition formed by compounding an indene-containing C | 05-06-2010 |
| 20100125122 | PROCESS FOR THE PRODUCTION OF A (CO)POLYMER COMPOSITION BY MEDIATED FREE RADICAL CHAIN GROWTH POLYMERIZATION - The present invention is a multistage process for the preparation of a co)polymer composition. Said process comprises the steps of: i) polymerizing in a first stage a reaction mixture comprising one or more monomer with optionally a rubber, a comonomer, a polymerization initiator, a chain transfer agent, a decomposition catalyst and/or a solvent, in the presence of one or more stable free radical precursor which provides a stable free radical during the polymerization process and/or one or more stable free radical such that the polymerization proceeds via a mediated free radical polymerization mechanism until a partial conversion of monomer(s) to (co)polymer is obtained and ii) polymerizing in a second stage the partially converted reaction mixture under reaction conditions that proceed via a free radical polymerization mechanism to obtain a further degree of conversion of monomer(s) to (co)polymer. | 05-20-2010 |
| 20100144973 | Particulate Rubber Composition - 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. | 06-10-2010 |
| 20100184920 | Methods of making styrenic polymeric compositions and methods of using same - A method comprising preparing a reaction mixture comprising a styrene monomer, an antioxidant, and a reaction rate improving additive, contacting the reaction mixture with an antioxidant reactive compound, and placing the reaction mixture under conditions suitable for polymerization of the styrene monomer to a styrenic polymer wherein the polymerization occurs at an overall reaction rate that is increased by equal to or less than 20% when compared to an otherwise similar polymerization process carried out in the absence of the reaction rate improving additive A method comprising preparing a reaction mixture comprising a styrene monomer, an elastomer, an antioxidant, a sodium or calcium salt of an organic acid, and an initiator; and placing the reaction mixture under conditions suitable for polymerization of the styrene monomer to a styrenic polymer, wherein the sodium or calcium salt of an organic acid protects the initiator such that the polymerization is carried out at a reaction rate greater than would otherwise be the rate in the absence of the sodium or calcium salt of an organic acid. | 07-22-2010 |
| 20100197862 | RUBBER COMPOUND AND MOLDED ARTICLE - A pharmaceutical/medical rubber compound contains the following components: (A) a composition obtainable by crosslinking (a) 100 parts by weight of an isobutylene polymer having terminal alkenyl groups with (d) a hydrosilyl-containing compound in the presence of (b) from 5 to 100 parts by weight of a polyolefin and (c) from 5 to 100 parts by weight of polybutene during melt kneading, and (B) an ultra-high molecular weight polyethylene powder. Compared with conventional thermoplastic elastomers, the pharmaceutical/medical rubber compound and its molded article are free from deformations and have sufficient permanent set resistance even under high temperature conditions, have excellent mechanical properties, low water absorption property, low reactivity and superb gas barrier properties, and can withstand high-temperature sterilization. | 08-05-2010 |
| 20100222515 | COPOLYMER RUBBER COMPOSITION, MOLDED PRODUCT, AND AUTOMOTIVE SEALANT - The copolymer rubber composition comprises 60 to 75% by weight of a copolymer rubber (1) and 40 to 25% by weight of a copolymer rubber (2), and exhibits a difference in iodine value of 5 to 30 between the copolymer rubber (1) and the copolymer rubber (2). The copolymer rubber (1) is an ethylene-α-olefin-nonconjugated polyene copolymer rubber having an ethylene unit of 50 mol % to 70 mol %, an α-olefin unit of 50 mol % to 30 mol %, and an iodine value of 10 to 30, and the copolymer rubber (2) is an ethylene-α-olefinic copolymer rubber having an ethylene unit of more than 70 mol % and 95 mol % or less, an α-olefin unit of less than 30 mol % and 5 mol % or more, and an iodine value of 0 to 8. | 09-02-2010 |
| 20100227976 | THERMOPLASTIC ELASTOMER COMPOSITION, AND VIBRATION-PROOF SOUND-PROOF MEMBER COMPRISING THE COMPOSITION - Disclosed is a thermoplastic elastomer composition which is excellent in a vibration-proof property and a sound-proof property, and which has flexibility, wear resistance and processability at the levels required for a member (e.g., a roller) to be used in an image-forming device (e.g., a printer). The thermoplastic elastomer composition contains a butyl rubber at a ratio of 30 to 80 mass % (inclusive), and further contains 15 to 50 parts by mass (inclusive) of an olefin thermoplastic resin and 10 to 100 parts by mass (inclusive) of a hydrogenerated styrene thermoplastic elastomer relative to 100 parts by mass of the rubber component, wherein the rubber component is finely dispersed by dynamic cross-linking. | 09-09-2010 |
| 20100240834 | IMPACT MODIFIED STYRENIC POLYMERS WITH IMPROVED STRESS CRACK PROPERTIES - A method of improving the stress crack resistance of an impact modified styrenic polymer comprising (a) combining about 95 to about 99.5 wt. % of an impact modified styrenic polymer with about 0.5 to about 5 wt. % of a polymer solution comprising about 25 to about 75 wt. % polyisobutylene and about 25 to about 75 wt. % of a polyolefin comprising one or more C | 09-23-2010 |
| 20110028654 | Process for Preparation of Polyolefins Via Living Coordinative Chain Transfer Polymerization - Disclosed is a method of producing a polyolefin composition comprising contacting a metallocene pre-catalyst, co-catalyst, and a stoichiometric excess of a metal alkyl; adding a first olefin monomer; and polymerizing the first monomer for a time sufficient to form the polyolefin. The method allows for the use of minimum amounts of activating co-catalyst and metallocene pre-catalyst. Also disclosed is a method of producing a block polyolefin composition comprising contacting a metallocene pre-catalyst, a co-catalyst, and a stoichiometric excess of a metal alkyl; adding a first olefin monomer; polymerizing the first monomer for a time sufficient to form the polyolefin; adding a second monomer; and polymerizing the second olefin monomer for a time sufficient to form said block polyolefin composition. Also disclosed are amorphous atactic polymer and copolymer compositions made according to the present invention. | 02-03-2011 |
| 20110196100 | RUBBER COMPOSITION AND TIRE USING THE SAME - An object of the present invention is to provide a rubber composition for a tire, which is, when it is used as a rubber composition for a tire, capable of exhibiting good dry grip properties and excellent grip properties in both a relatively low temperature range and a relatively high temperature range, as well as a tire produced by using the rubber composition. The rubber composition of the present invention contains: a rubber component made of at least one type of diene-based polymer; and a copolymer resin obtained by copolymerizing α-methylstyrene based monomer and aromatic vinyl monomer. | 08-11-2011 |
| 20110196101 | Homogeneous Polymer Blend and Process of Making the Same - A homogeneous polymer blend comprises a thermoplastic first polymer having a crystallinity of at least 30%; and a second polymer having a crystallinity of more than 5% and being at least partially cross-linked. | 08-11-2011 |
| 20110201757 | Methods for Production of High Impact Polystyrene - A method of preparing a high impact polystyrene comprising contacting styrene monomer, a high cis polybutadiene elastomer, and an initiator under high shear within a reaction zone. A high-impact polystyrene comprising a high cis polybutadiene elastomer. A method of preparing a high impact polystyrene comprising contacting styrene monomer, a high cis polybutadiene elastomer, and an initiator under extreme reaction conditions within a reaction zone. | 08-18-2011 |
| 20120016086 | Adhesives Made From Polymer Systems - The present invention relates to an adhesive, comprising at least one polymer system obtained by a process for reducing the melt viscosity of at least one polymer blend starting material, wherein the process comprises the step of treating at least one polymer blend with at least one radical donor under shear stress at a temperature above the softening point of said polymer blend. | 01-19-2012 |
| 20120088883 | BONDING BASE FOR ELECTRONIC COMPONENTS, AND METHOD - A bonding base for electronic components, and a method. The bonding base comprises: a dielectric basic layer formed of a mixture comprising thermoplastic polymer, the polymer part of which mixture comprises 75 to 95% by weight of thermoplastic PPO, the polymer part further comprising 5 to 20% by weight of elastomer which is incompatible with PPO. | 04-12-2012 |
| 20120208964 | NEODYMIUM-CATALYZED POLYBUTADIENES - The invention relates to a high-molecular-weight, linear, neodymium-catalysed polybutadiene having a high proportion, >95%, of cis-1,4 units having a low proportion, <1%, of 1,2-vinyl content, and also having a small molar-mass-polydispersity index (MPI), characterized in that
| 08-16-2012 |
| 20130090433 | Modified Polyethylene Compositions - The present invention relates to a branched modifier and a composition comprising more than 25 wt % (based on the weight of the composition) of one or more linear ethylene polymers having a g′ | 04-11-2013 |
| 20130131273 | Isobutylene Copolymer with Grafted Polymer Groups - Disclosed are copolymers which comprise: a) an isobutylene copolymer having grafted polymer groups, b) optionally a tackifier, and c) optionally a non-functionalized poly(isobutylene) polymer. The compositions are useful in adhesives and coatings. | 05-23-2013 |
| 20130211010 | COPOLYMER, RUBBER COMPOSITION, CROSSLINKED RUBBER COMPOSITION, AND TIRE - Provided is a copolymer of a conjugated diene compound and a non-conjugated olefin, the copolymer being a block copolymer, the conjugated diene compound unit having 1,2 adduct (including 3,4 adduct) content of 5% or less or the conjugated diene compound unit having a cis-1,4 bond content of more than 92%, in which preferred examples of the conjugated diene compound include 1,3-butadiene and isopropylene, and preferred examples of the non-conjugated olefin include ethylene, propylene, and 1-butene. | 08-15-2013 |
| 20130217831 | POLYMER FILAMENT - A polymer filament comprising a polyolefin composition which comprises (percentages by weight): A) 5%-95% of a propylene homopolymer; and B) 5-95% of a butene-1 homopolymer or copolymer having a flexural modulus of 80 MPa or higher. | 08-22-2013 |
| 20130324668 | RUBBER COMPOSITION AND TIRE PRODUCED BY USING THE SAME - A rubber composition containing 100 parts by mass of a rubber component (A) comprising at least one rubber of natural rubber and synthetic diene base rubbers and 5 to 120 parts by mass of a low molecular weight aromatic vinyl compound-diene compound copolymer (B) having a weight average molecular weight (measured by gel permeation chromatography and reduced to polystyrene) of 1,000 to 300,000 and, wherein the copolymer (B) comprises 0 to 80% by mass of an aromatic vinyl compound and has a vinyl bond content of 0 to 80% by mass in the part of the diene compound, and has a cross-linkable functional group at an end. Further, tires produced by using the rubber composition are provided. | 12-05-2013 |
| 20140303325 | THERMOPLASTIC POLYOLEFIN COMPOSITION - Composition comprising a polypropylene matrix (M-PP), at least one elastomeric copolymer (EP), a high density polyethylene (HDPE) being bimodal or multimodal, and a filler (F). | 10-09-2014 |
| 20160009842 | RUBBER COMPOSITION, INNER LINER MATERIAL, AND PNEUMATIC TIRE | 01-14-2016 |
| 20160032089 | THERMOPLASTIC ELASTOMER COMPOSITION AND MOLDED ARTICLE THEREOF - The thermoplastic elastomer composition includes (A) a polypropylene resin, (B) a non-conjugated diene copolymer having a Mooney viscosity (ML | 02-04-2016 |
| 20160115305 | METHOD FOR PRODUCING RUBBER COMPOSITION - A method for producing a rubber composition that can improve wet grip performance is provided. The rubber composition includes 100 parts by mass of a rubber component, from 20 to 150 parts by mass of silica, and from 1 to 10 parts by mass of a polymer gel as crosslinked diene polymer particles, wherein from 30 to 90 parts by mass of at least one modified diene rubber selected from the group consisting of a styrene-butadiene rubber, a butadiene rubber and a natural rubber, each haying introduced therein a functional group having an interaction with the silica, and from 70 to 10 parts by mass of an unmodified dine rubber are used as 100 parts by mass of the rubber component, and a polymer gel having a functional group which has an interaction with a functional group of the modified diene rubber is used as the polymer gel. | 04-28-2016 |
| 20160159960 | BUTADIENE-DERIVED POLYMERS GRAFTED NANOPARTICLES AND THEIR METHODS OF MANUFACTURE AND USE - Methods for of synthesizing a polymer functionalized nanoparticle are provided. The method can comprise: attaching an anchoring compound to a nanoparticle; attaching a RAFT agent to the anchoring compound; and polymerizing a plurality of butadiene-derived monomers on the anchoring compound to form a polymeric chain covalently bonded to the nanoparticle via the anchoring compound. Polymer functionalized nanoparticles are also provided that include a nanoparticle defining a surface; a butadiene-derived polymeric chain covalently bonded to the surface of the nanoparticle. Nanocomposites are also provided that include a plurality of such polymer functionalized nanoparticles dispersed within a polymeric matrix. | 06-09-2016 |
| 20190144653 | Bimodal Ethylene, Alpha-Olefin, and Diene Polymers Using Dual Organometallic Catalysts | 05-16-2019 |
| 525233000 | Polymer derived from nitrogen-containing reactant | 7 |
| 20080293889 | NITRILE RUBBERS - An improved polymerization and work-up process makes it possible to produce specific nitrile rubbers which have a specific calcium and chloride content and have a particularly high storage stability. | 11-27-2008 |
| 20100197863 | Compositions Exhibiting High ESCR and Comprising Monovinylidene Aromatic Polymers and Olefinic Copolymers Containing Unsaturation - Compositions comprising (a) a monovinylidene aromatic polymer, e.g., HIPS, and (b) an ethylene/alpha-olefin (EAO) copolymer, e.g., an ethylene-propylene copolymer, that satisfies the mathematical relationship: y≦20+2.35x in which y is the ethylene content in mole percent (mol %) of the EAO copolymer and x is the Brookfield viscosity in centipoise (cP) at 10O° C. of the EAO copolymer and the viscosity is at least 1 centipoise (cP), exhibit improved environmental stress crack resistance as compared to compositions containing monovinyiidene aromatic polymers but without such an EAO copolymer. The compositions are useful in the manufacture of articles, e.g., refrigerator liners and food packaging, which come in contact with the oils contained in various food stuffs. | 08-05-2010 |
| 20120202949 | IMPACT MODIFIED MONOVINYLIDENE AROMATIC POLYMER HAVING LOW RUBBER CROSSLINKING - The ductility/stiffness balance of a rubber-modified monovinylidene aromatic polymer, e.g., HIPS, is increased without increasing the rubber content of the polymer and/or changing the size of the average rubber particle by a process comprising the step of crosslinking the rubber such that the rubber-modified polymer has an optical crosslink index (OCLI) of <0.5 and an injection molded/compression molded (IM/CM) modulus ratio ≧1.3. | 08-09-2012 |
| 20120289660 | RUBBER-REINFORCED VINYL AROMATIC (CO)POLYMER, HAVING AN OPTIMUM BALANCE OF PHYSICO-MECHANICAL PROPERTIES AND A HIGH GLOSS - Vinyl aromatic (co) polymer reinforced with a rubber selected from a linear diene rubber (i) with a solution viscosity lower than 70 cPs; a partially radial diene rubber (ii), with a solution viscosity lower than 70 cPs; a three-chain diene rubber (iii) with a solution viscosity lower than 70 cPs; a blend of linear diene rubbers (i) and radial diene rubbers (iv) in a maximum ratio between them (i)/(iv) of between 99.5/0.5 and 85/15. | 11-15-2012 |
| 20130237669 | NEODYMIUM-CATALYZED POLYBUTADIENES - The invention relates to a high-molecular-weight, linear, neodymium-catalysed polybutadiene having a high proportion, >95%, of cis-1,4 units having a low proportion, <1%, of 1,2-vinyl content, and also having a small molar-mass-polydispersity index (MPI), characterized in that | 09-12-2013 |
| 20140296439 | MODIFIED RUBBER MASTERBATCH, AND RUBBER COMPOSITION AND VULCANIZED RUBBER PRODUCED THEREFROM, AND THE PREPARATION PROCESSES FOR THEM - The present application relates to a modified rubber masterbatch and preparation method thereof, rubber composition prepared therewith and vulcanized rubber and preparation method thereof. The modified rubber component comprises uncrosslinked rubber and rubber particles having crosslinked structure dispersed therein, wherein the rubber particles having crosslinked structure are synthetic rubber particles and/or natural rubber particles, have an average particle size of 20-500 nm and a gel content of 60% by weight or higher, and wherein the uncrosslinked rubber is styrene-butadiene rubber. The weight ratio of the rubber particles having crosslinked structure to the uncrosslinked rubber is greater than 20:80 and less than or equal to 80:20. The rubber composition comprises a blend of modified rubber component and base rubber, in which the modified rubber masterbatch is present in an amount of 1 to 70 parts by weight, relative to per 100 parts by weight of the base rubber. The vulcanized rubber of the rubber composition has not only low rolling resistance and excellent wet skid resistance, but also excellent wear resistance, and thus can be used for producing high performance tread rubber. | 10-02-2014 |
| 20140364573 | NEODYMIUM-CATALYZED POLYBUTADIENES - The invention relates to a high-molecular-weight, linear, neodymium-catalysed polybutadiene having a high proportion, >95%, of cis-1,4 units having a low proportion, <1%, of 1,2-vinyl content, and also having a small molar-mass-polydispersity index (MPI), characterized in that
| 12-11-2014 |
| 525235000 | Polymer derived from halogen-containing reactant | 1 |
| 20100137519 | Process for the Preparation of a Vulcanized Blend of Rubbers - This invention relates to a process for preparing a vulcanized rubber blend, said blend comprising (a) natural rubber or poly-isoprene rubber, (b) butadiene based rubber, and (c) rubber with an essentially saturated backbone. The improvement is that rubber c) is pre-heated with at least part of the vulcanization system before mixing with rubbers a) and b) and co-vulcanizing. | 06-03-2010 |
| 525236000 | At least two polymers derived from reactants containing two or more ethylenic groups and devoid of an aryl ring | 28 |
| 20090018272 | Rubber composition and studless tire obtained by using the rubber composition - The object of the present invention is to provide a rubber composition suitable for a studless tire, which can inhibit rubber hardness increase with time and reveals excellent performance on ice and snow for a long time. The present invention relates to a rubber composition comprising 1 to 60 parts by weight of hydrogenised liquid polybutadiene based on 100 parts by weight of a rubber component containing at least 80% by weight of a natural rubber and a butadiene rubber, wherein a peak temperature of tan δ is at most 45° C. and rubber hardness at 0° C. is at most 64. | 01-15-2009 |
| 20090247705 | RUBBER COMPOSITION, CROSSLINKED RUBBER AND MOLDED ARTICLE - A rubber composition includes (i) an α,β-unsaturated nitrile conjugated diene rubber containing structural units derived from a conjugated diene in an amount of 30 to 60 mass % with respect to the total structural units, (ii) an ethylene-α-olefin-nonconjugated diene copolymer rubber having a limiting viscosity of 3.3 dl/g or more measured at 135° C. in a decalin solvent, and (iii) a crosslinking agent. The rubber composition can produce a crosslinked rubber and a molded article exhibiting excellent oil resistance and heat resistance in a well-balanced manner. | 10-01-2009 |
| 20100137520 | Branched Polymers and Methods for Their Synthesis and Use - Branched polymers including multi-branched polymers, functionalized branched polymers, star-branched polymers, and dendigraft polymers. Methods for the synthesis of branched polymers and method for the use of branched polymers in tire components are also included. | 06-03-2010 |
| 20100152389 | VINYL-CIS-POLYBUTADIENE RUBBER AND BUTADIENE RUBBER COMPOSITION USING THE SAME - 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. | 06-17-2010 |
| 20100261847 | MOLECULAR WEIGHT CONTROLLABLE, HIGH 1,4-TRANS POLYBUTADIENE CATALYST SYSTEM - Provided are a molecular weight controllable, high 1,4-trans polybutadiene catalyst system, and more particularly, a four-component catalyst for preparing 1,4-trans polybutadiene with high yield, the catalyst comprising a cobalt compound, an organoaluminum compound, a phenol-based compound, and a phosphorus-based compound used to prepare 1,4-trans polybutadiene by polymerizing butadiene or a butadiene derivative, and capable of controlling the molecular weight of 1,4-trans polybutadiene by regulating the amount of the phosphorus-based compound. | 10-14-2010 |
| 20110172365 | RUBBER WITH RECYCLED CONTENT - Rubber compositions, methods of making rubber compositions and articles comprising the rubber compositions that have crumb rubber particles in the rubber compositions. A cross-linked rubber composition, comprising a diene rubber and a masterbatch material comprising between 50 and 75 wt. % natural rubber and between 25 and 50 wt. % crumb rubber particles, wherein the crumb rubber particles are 40 mesh or smaller. A method for preparing a rubber composition having crumb rubber, the method comprising mixing a masterbatch, the masterbatch comprising between 50 and 75 wt. % natural rubber and between 25 and 50 wt. % crumb rubber particles and mixing the masterbatch with a diene rubber. | 07-14-2011 |
| 20120108755 | BRANCHED POLYMERS AND METHODS FOR THEIR SYNTHESIS AND USE - Branched polymers including multi-branched polymers, functionalized branched polymers, star-branched polymers, and dendigraft polymers. Methods for the synthesis of branched polymers and method for the use of branched polymers in tire components are also included. | 05-03-2012 |
| 20130225766 | METHOD FOR PROCESSING RUBBER GRANULES OR RUBBER POWDERS - A method for processing rubber granules or rubber powders containing different types of rubber. Vehicle tires containing natural rubber in the tread and butyl rubber in the inner liner are granulated or ground to prepare rubber granules or rubber powders, which are processed in a flotation cell under stirring and with the addition of air. The natural rubber fraction of the rubber granules has a higher tendency to adsorb air bubbles and to rise in the flotation cell, while the butyl rubber fraction remains at the bottom. The rubber granules are separated into two or more rubber fractions with an increased amount of a specific rubber type in each fraction. | 08-29-2013 |
| 20130317176 | POLYISOPRENE, PREPARATION METHOD THEREOF, POLYISOPRENE RUBBER COMPOUNDS AND VULCANIZATE THEREFROM - The method for preparation of polyisoprene includes conducting polymerization reaction of isoprene in a first organic solvent under the presence of rare earth catalyst I and rare earth catalyst II, to obtain polyisoprene with bimodal molecular weight distribution, wherein the polymerization reaction conditions are controlled to ensure the peak molecular weight of the high molecular weight component fraction in the polyisoprene is 1×10 | 11-28-2013 |
| 20140088258 | ELASTOMERIC COMPOSITIONS COMPRISING RECLAIMED VULCANIZED ELASTOMER PARTICLES AND IMPROVED METHODS OF MANUFACTURE THEREOF - Methods for making elastomer compounds are described. The compounds include reclaimed vulcanized elastomer materials such as micronized rubber powders (MRP). The elastomeric compositions exhibit lower tensile strength variability. As described herein, shorter mixing times can be used to achieve the same minimum tensile strength as composition containing no reclaimed material. The elastomeric compositions may include various proportions of reclaimed vulcanized elastomer materials. A rubber compound is also described which comprises reclaimed material and which has a minimum tensile strength equal to or higher than a predetermined minimum tensile strength associated with a compound containing no reclaimed material. The rubber compound is manufactured with a reduced mixing time compared to that of the compound with no MRP. | 03-27-2014 |
| 20140163172 | RUBBER COMPOSITION FOR SIDEWALL OR BASE TREAD, AND PNEUMATIC TIRE - The present invention provides a rubber composition for a sidewall or base tread, which offers good flex crack growth resistance, crack initiation resistance, durability, and fuel economy despite the use of a softener derived from non-petroleum resources; and also provides a pneumatic tire formed from the rubber composition. The present invention relates to a rubber composition for a sidewall or base tread, containing a rubber component including at least two kinds of diene rubbers, and a myrcene polymer, wherein the rubber component includes at least one kind of diene rubber selected from the group consisting of natural rubber, epoxidized natural rubber, and butadiene rubber, and the myrcene polymer has a weight average molecular weight of 1000 to 500000. | 06-12-2014 |
| 20150299434 | ANTIVIBRATION RUBBER COMPOSITION, AND ANTIVIBRATION RUBBER - The present invention addresses the problem of providing: an antivibration rubber composition which can provide a hardened rubber product that has excellent antivibration properties (a low motion magnification), compression permanent strain and low-temperature properties and can keep strength properties (hardness, tensile elongation, tensile strength) and hot aging resistance thereof at good levels; and an antivibration rubber which is produced by hardening the rubber composition. An antivibration rubber composition characterized by comprising a rubber component, sulfur, a bismaleimide compound and N-phenyl-N-(trichloro-methylthio)benzenesulfoneamide, wherein the rubber component comprises a natural rubber and a polybutadiene rubber at a blend ratio of 60/40 to 90/10 by mass. | 10-22-2015 |
| 20150337123 | RUBBER COMPOSITION FOR ANTI-VIBRATION RUBBER - A rubber composition for anti-vibration rubber, comprising rubber components, the rubber composition comprising 4 to 40 parts by weight of the following component out of the rubber components when the whole amount of the rubber components is regarded as 100 parts by weight: a lithium catalyst-type polyisoprene rubber. | 11-26-2015 |
| 20150353657 | RUBBER COMPOSITION, AND PNEUMATIC TIRE USING SAME - The invention provides a rubber composition prepared by mixing, per 100 parts by mass of the rubber component comprising at least 50% by mass of a diene-based rubber, from 20 to 150 parts by mass of a filler, and from 0.05 to 30 parts by mass of a compound A which has a specific amidine structure and has a functional group reactive with the diene-based rubber. The rubber composition improves both a high elastic modulus and a low tan δ. The invention also provides a pneumatic tire using the rubber composition. | 12-10-2015 |
| 20160002371 | Rubber Composition for Tires, and Pneumatic Tire Using Same - Provided is a rubber composition for a tire, comprising: diene rubber contained in a quantity of 100 parts by mass; silica contained in a quantity of 60 to 200 parts by mass; polysiloxanes represented by the average composition formula of Formula (1): (A) | 01-07-2016 |
| 20160009843 | RUBBER COMPOSITION FOR TIRE TREAD, AND PNEUMATIC TIRE USING SAME | 01-14-2016 |
| 20160060437 | Transparent, Tough and Heatproof Rubber Composition Comprising Neodymium-Catalyzed Isoprene Component, And Manufacturing Process For The Same - In order to provide a rubber composition having high transparency, toughness and heat-resisting property, the present invention can provide a composition comprising a neodymium-catalyzed isoprene rubber (IR) component; and a rubber polymer (RB) component selected from the group consisting of BR, 1,2-polybutadiene rubber, and SBR, wherein the amount of IR is from about 5 to 95 mass parts with the proviso that the total amount of IR and RB is 100 mass parts, wherein the composition is substantially free of silica, wherein the composition has haze of less than about 20%, and wherein the composition has Type A Durometer hardness (0 sec) of about 30 or more. | 03-03-2016 |
| 525237000 | At least one of these polymers is derived from two or more reactants | 11 |
| 20120252979 | Process for Producing Blends of Syndiotactic, 1,2-Polybutadiene and Rubbery Elastomers - Blends of syndiotactic 1,2-polybutadiene and rubbery elastomers are prepared by a process that comprises polymerizing 1,3-butadiene monomer into syndiotactic 1,2-polybutadiene within a rubber cement of an elastomeric terpolymer by using a chromium-based, molybdenum-based, or iron-based catalyst composition. Polymer composition comprising the blend with improved properties is also provided. | 10-04-2012 |
| 20120309902 | Polybutadiene, Modified Polybutadiene, Method for Producing Both, and Rubber-Reinforced Styrene Resin Composition Using Same - Disclosed are a polybutadiene having a controlled microstructure, a narrow molecular weight distribution, minimal gel content, and a low APHA color, a modified polybutadiene, producing methods for both, and a rubber-reinforced styrene resin composition using the same. The polybutadiene of the present invention is characterised in that the ratio (Tcp/ML | 12-06-2012 |
| 20130012660 | TIRE RUBBER COMPOSITION AND PNEUMATIC TIRE - The present invention provides a tire rubber composition with which the grip performance, the abrasion resistance, and the performance in terms of rolling resistance are improved in a balanced manner. The present invention relates to a tire rubber composition comprising: a modified diene rubber A which is modified with a specific acrylamide compound; and a modified diene rubber B which is modified with a specific modifying compound alone or together with a specific silicon or tin compound, a weight average molecular weight of a total of the modified diene rubbers A and B being 300,000 to 1,400,000. | 01-10-2013 |
| 20140051809 | Long Chain Branched EPDM Compositions and Processes for Production Thereof - Highly branched compositions including: (i) from about 96 wt % to about 99.9 wt % metallocene catalyzed ethylene propylene diene derived units; and (ii) from about 0.1 wt % to about 4 wt % multifunctional monomer derived units, wherein the highly branched composition has: (a) a Mooney viscosity ML (1+4) at 125° C. of about 30 to 100 MU, (b) a Mooney relaxation area MLRA of about 100 to about 1000, (c) a branching index, g′(vis) of less than about 0.9, (d) a phase angle, δ, of less than about 55 degrees at a complex modulus of 10 kPa, measured at 190° C., and (e) a degree of shear thinning greater than about 0.95, measured at 190° C., are disclosed herein. Homogeneous blends including this composition are also described. Processes to make the highly branched composition and the homogeneous blend are also described herein. | 02-20-2014 |
| 20140249276 | METHOD FOR PRODUCING BRANCHED FUNCTIONALIZED DIENE (CO)POLYMERS - The invention relates to the field of producing synthetic rubbers, in particular diene (co)polymers, such as polybutadiene, polyisoprene and styrene-butadiene rubber (SBR), which can be used in the production of tyres and industrial rubber articles, in the modification of bitumens, in electrical engineering and in other fields. The method consists of a polymerization process or a copolymerization process which is carried out in two parallel reactors, and each of dienes are polymerized or copolymerized with each other and/or with arylvinyl compounds, wherein an organolithium initiator, an electron donor additive and a branching agent are fed into the first reactor, and an organo lithium initiator, an electron donor additive and a functionalizing agent are fed into the second reactor, and the resultant polymerized mixtures are subsequently mixed with each other. This method allows for producing branched functionalized (co)polymers of dienes that are characterized by a statistical distribution of monomer units, a high content of vinyl units (1,2-butadiene units and/or 3,4-isoprene units (more than 60%)), a narrow molecular weight distribution and a controllable content of branched and functionalized parts in the (co)polymer. | 09-04-2014 |
| 20140323660 | RUBBER COMPOSITION FOR TIRE, AND PNEUMATIC TIRE - The present invention provides a rubber composition for tires which achieves a balanced improvement in rolling resistance, abrasion resistance, and wet-skid performance while providing excellent processability; and a pneumatic tire including the rubber composition. The present invention relates to a rubber composition for tires, including: a modified diene rubber A which has been terminally modified with a specific acrylamide compound; a modified diene rubber B which has been modified with a silicon or tin compound and a specific modifying compound or with the modifying compound; and a silane coupling agent containing a mercapto group, the modified diene rubbers A and B, taken as a whole, having a weight average molecular weight falling within a specific range. | 10-30-2014 |
| 20140357798 | Crosslinked Composition, Method for Producing Crosslinked Composition, and Molded Product - A crosslinked composition is obtained by crosslinking a composition, containing: 1 to 99 parts by mass of a vinyl aromatic copolymer rubber (I) comprising 5 to 70% by mass of a vinyl aromatic monomer unit and 0.1 to 30% by mass of a conjugated diene monomer unit and having one or more tan δ peak temperatures between 75° C. and 125° C.; 99 to 1 parts by mass of an ethylenic copolymer rubber (II); 10 to 100 parts by mass of an olefinic resin (III) based on 100 parts by mass of a total amount of the vinyl aromatic copolymer rubber (I) and the ethylenic copolymer rubber (II); and 0.01 to 50 parts by mass of a crosslinking agent (IV) based on 100 parts by mass of the total amount of the vinyl aromatic copolymer rubber (I) and the ethylenic copolymer rubber (II). | 12-04-2014 |
| 20150119528 | FUNCTIONAL DIENE POLYMER, PREPARATION METHOD THEREOF, AND RUBBER COMPOSITION COMPRISING THE SAME - The present invention provides a functional diene polymer, a preparation method thereof and a rubber composition comprising the functional diene polymer. The functional diene polymer comprises at least one type of conjugated diene structural units and silane coupler functional units represented by formula (I) in its molecular chain, and the number-average molecular weight of the functional diene polymer is 50,000˜1,000,000; R | 04-30-2015 |
| 20160122520 | Ethylene-Alpha Olefin-Diene Resin Blend Composition and Method for Preparing the Same - The present invention relates to an EPDM resin blend composition, which includes a first EPDM resin matrix and a second EPDM resin, wherein a ratio (M | 05-05-2016 |
| 20160130428 | RUBBER COMPOSITION AND STYRENE RESIN COMPOSITION USING THE SAME - Embodiments of the present invention provide a rubber composition in which solution viscosity and cold flow are improved. The rubber composition according to the embodiments of the present invention may include 20 to 90 wt % of a polybutadiene (A) produced by a metallocene catalyst, having: a cis-1,4-structure in microstructure being 65 to 95 mol %, a vinyl-1,2-structure in microstructure being 4 to 30 mol %, and a weight average molecular weight (Mw) being 2×10 | 05-12-2016 |
| 20180022903 | RUBBER COMPOSITION INCLUDING CONJUGATED DIENE POLYMER AND OLEFIN POLYMER AND TIRE USING SAME | 01-25-2018 |
