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| Number | Title | Issue Date |
| 7435781 | Polymers for electrical applications Electrical insulation compounds are disclosed, the insulation compounds including an ethylene polymer comprising at least 40 wt % ethylene-derived units and having a density of ≦0.91 g/cm3 and a propylene polymer comprising at least 75 wt % propylene-de... | 10/14/2008 |
| 7423091 | Golf ball An elastomeric composition for forming a golf ball or a component thereof is disclosed that includes the use of a non-conjugated diene monomer having two or more vinyl (CH2═CH—) terminal end groups. The composition produces a molded product exhibiting... | 09/09/2008 |
| 7371805 | Hydrogenated copolymer and composition thereof A hydrogenated copolymer obtained by hydrogenating an unhydrogenated copolymer comprising conjugated diene monomer units and vinyl aromatic monomer units, the hydrogenated copolymer containing at least one hydrogenated copolymer block (B) which is obtained by hydrog... | 05/13/2008 |
| 7351776 | Bulk polymerization process A method for the continuous production of polydienes, the method comprising the steps of (a) charging a mixture of one or more monomer, catalyst system, and less than 50% weight percent organic solvent based on the total weight of the monomer, catalyst and solvent, ... | 04/01/2008 |
| 7335807 | Solventless liquid isoprene compounds In one embodiment, this invention relates to a solventless liquid isoprene compound. The compound includes a liquid isoprene rubber. The compound also includes a curing agent selected from sulfur and/or sulfur donors. The curing agent is present in an amount of at l... | 02/26/2008 |
| 7304110 | Polymer, process for producing the polymer and curable composition containing the polymer This invention provides a production method of a vinyl polymer having a functional group at a molecular chain terminus which comprises adding a compound (I) having a functional group and an internal alkenyl group or conjugated polyene compound (II) in the living rad... | 12/04/2007 |
| 7199192 | Golf ball An elastomeric composition for forming a golf ball or a component thereof is disclosed that includes the use of a non-conjugated diene monomer having two or more vinyl (CH2═CH—) terminal end groups. The composition produces a molded product exhibiting... | 04/03/2007 |
| 7173087 | Hydrogenated nitrile rubber composition A hydrogenated nitrite rubber composition for providing a cross-linked product having a 20% modulus of 10 MPa or more and a thermal conductivity of 0.4 W/m·K or more at 25° C. The hydrogenated nitrile rubber composition includes 100 parts by weight of hydrogenated... | 02/06/2007 |
| 7166672 | Gels from silane-coupled block copolymers The present invention relates to gels prepared from novel anionic block copolymers of mono alkenyl arenas and conjugated dienes, and to blends of such block copolymers with such polymers. The block copolymers are selectively hydrogenated and have A polymer blocks an... | 01/23/2007 |
| 7119147 | Rubber composition A rubber composition which prevents the rise in rubber hardness over time and can maintain good performance on snow and ice over a long period, which includes (A) a diene rubber containing, as a main component, at least one member selected from the group consisting ... | 10/10/2006 |
| 7022766 | Olefin block copolymer, viscosity index improver for lubricating oils and lubricating oil composition The present invention provides an olefin block copolymer for a viscosity index improver capable of preparing a lubricating oil composition having excellent low temperature properties and excellent balance between viscosity and shear stability, a viscosity index impr... | 04/04/2006 |
| 6806318 | ABS molding materials with enhanced working properties Thermoplastic molding composition characterized in that the polymer proportion soluble in dichloromethane has a c50 value of acrylonitrile of ≧28 wt. % and a chemical distribution (c90−c10 value) of the acrylonitrile of ≧5 wt. ... | 10/19/2004 |
| 6797783 | Modified natural rubber A modified natural rubber is disclosed, which is obtained by modifying a deproteinized natural rubber having a nitrogen content of less than 0.10% by weight. A process for improving the graft ratio and the graft efficiency of natural rubber and a process for improvi... | 09/28/2004 |
| 6777499 | Multiblock interpolymers and processes for the preparation thereof The present invention relates to multiblock interpolymers having the following symmetric structures and processes for their preparation: Y-X-Y, wherein Y represents a block of a random copolymer of conjugated diene and monovinyl aromatic monomer; and X represents a ... | 08/17/2004 |
| 6703448 | Block copolymers for rubber compositions usable to tires The present invention relates to block copolymers intended to constitute an elastomeric matrix of a cross-linkable rubber composition with reduced hysteresis, to such a rubber composition which is usable in the cross-linked state in a tire tread, to such ... | 03/09/2004 |
| 6699941 | Block copolymer The present invention relates to selectively hydrogenated block copolymers where one of the blocks is a random copolymer of a mono-alkenyl arene monomer, such as styrene, and a 1,3-cyclodiene monomer, such as 1,3-cyclohexadiene, and one of the other block... | 03/02/2004 |
| 6686321 | Polar grafted polyolefins, methods for their manufacture, and lubricating oil compositions containing them A grafted polyolefin containing one or more of N-vinylimidazole, 4-vinylpyridine, or other ethylenically-unsaturated nitrogen-containing or oxygen-containing graftable monomers grafted to a polyolefin copolymer is disclosed. The grafted polyolefin prefera... | 02/03/2004 |
| 6586533 | Method of manufacture of polybutadiene and polyisoprene based thermosetting compositions Articles are formed from a thermosetting composition based on polybutadiene or polyisoprene resins which are subjected to a high temperature cure step of greater than 250° C. The thermosetting compositions may include fillers such as particulate ceramic ... | 07/01/2003 |
| 6566549 | Continuous polymerization process and products therefrom A continuous process for oligomers which do not contain, as polymerized units, carboxylic acid-containing monomers and their salts, including the steps of: (1) forming a reaction mixture, substantially free of carboxylic acid-containing monomers and their... | 05/20/2003 |
| 6521712 | Glass-clear impact-modified polystyrene based on styrene-butadiene block copolymers Block copolymers comprise at least two hard blocks S1 and S2 made from vinyl aromatic monomers and, between these, at least ore random soft block B/S made from vinyl aromatic monomers and from dienes, where the proportion of the hard... | 02/18/2003 |
| 6518379 | Method of producing rubber compositions in styrene solutions with sterically superior chelate catalysts In a process for polymerizing dienes in a solvent comprising vinylaromatic monomers, the polymerization is carried out in the presence of a metal compound of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo or W as catalyst and a Lewis acid as cocatalyst and, if desired, an... | 02/11/2003 |
| 6506845 | Method of preparing rubber substrate A method of preparing rubber substrate is provided. In the method, 50 to 95 parts by weight of conjugated diene monomer is first-polymerized, until the resulting first rubber substrate has gel content of 5 to 70 wt %. Thereafter, the first rubber substrat... | 01/14/2003 |
| 6500535 | Heat resistant, low dielectric polymers, and films, substrates, electronic parts and heat resistant resin molded parts using the same The invention provides a heat-resistant, low-dielectric polymeric material that is preferably a copolymer in which a non-polar -olefin base polymer segment and a vinyl aromatic copolymer segment are chemically combined with each other, and that is ... | 12/31/2002 |
| 6492466 | Increased throughput in the manufacture of anionic polymers by reduction in polymer cement viscosity through the addition of metal alkyls The present invention is an improvement upon the known method of anionically polymerizing monomers by contacting the monomers with an anionic polymerization initiator which is an organo-substituted alkali metal compound. The improvement comprises decreasi... | 12/10/2002 |
| 6417272 | Process for the preparation of block copolymers A process is disclosed for manufacturing coupled radial block copolymers of the S--B--Li type having improved optical properties, which process utilizes coupling agents having from about 3 to about 7 epoxy groups per mole.... | 07/09/2002 |
| 6410652 | Processes for preparing grafted copolymers Methods for making graft copolymers include (a) providing (i) an ethylene/propylene 9EP) copolymer or other graftable polymer, (ii) an ethylenically unsaturated sulfur-, nitrogen- and/or oxygen-containing monomer, and (iii) an amount of an initiator suffi... | 06/25/2002 |
| 6407185 | Process for the preparation of a composition containing ethylene polymers, composition containing ethylene polymers and use thereof Process for the preparation of a composition containing ethylene polymers comprising a polymer of melt index MI2 of 5 to 1000 g/10 min and a polymer of melt index MI5 of 0.01 to 2 g/10 min, the ratio of these indices being from 500 t... | 06/18/2002 |
| 6399703 | Method for the continuous production of thermoplastic molding materials A process for preparing impact-modified styrene polymers (HIPS) omprises anionic polymerization of styrene in the presence of a rubber in one or more polymerization reactors in succession. The rubber is prepared in solution in an immediately upstream proc... | 06/04/2002 |
| 6376615 | Method for functionalizing a polymer and preparing copolymers and terpolymers The present invention describes the preparation of copolymers grafted by the so-called "grafting from" method, comprising two steps. In the first step, a polymer of a variable type referred to as poly(M1) is reacted with persistent free radical... | 04/23/2002 |
| 6344522 | Process for the preparation of a composition containing ethylene polymers, composition containing ethylene polymers and use thereof Process for the preparation of a composition containing ethylene polymers comprising a polymer of melt index MI2 of 5 to 1000 g/10 min and a polymer of melt index MI5 of 0.01 to 2 g/10 min, the ratio of these indices being from 500 t... | 02/05/2002 |
| 6331594 | Process for producing blends of syndiotactic 1,2-polybutadiene and rubbery elastomers with an iron-based catalyst system A process for preparing blends of syndiotactic 1,2-polybutadiene and rubbery elastomers comprising the steps of (1) providing a mixture of high cis-1,4-polybutadiene rubber cement and 1,3-butadiene monomer, and (2) combining (a) an iron-containing compoun... | 12/18/2001 |
| 6306976 | Rubbery polymer and method for producing the same Disclosed is a rubbery polymer comprising a conjugated diene polymer, and bonded thereto, a lithium-detached residue of a lithium-containing organic polymer used as a catalyst in the production of the conjugated diene polymer, wherein the lithium-containi... | 10/23/2001 |
| 6300289 | Polar grafted polyolefins, methods for their manufacture, and lubricating oil compositions containing them A grafted polyolefin containing one or more of N-vinylimidazole, 4-vinylpyridine, or other ethylenically-unsaturated nitrogen-containing or oxygen-containing graftable monomers grafted to a polyolefin copolymer is disclosed. The grafted polyolefin prefera... | 10/09/2001 |
| 6242536 | Process for preparation of block copolymers in mixed alkane/cycloalkane solvents The dispersibility of the initial polystyrene block in forming a S-B-S type of copolymer is improved by first preparing a small block of homopolydiene such as homopolybutadiene as a dispersing agent. Onto this small block of homopolybutadiene, the first b... | 06/05/2001 |
| 6239218 | Hydrogenated block copolymer and composition of the same A hydrogenated block copolymer comprising: at least two polymer blocks A mainly comprising vinylaromatic hydrocarbon compound monomer units; and at least two polymer blocks B mainly comprising hydrogenated conjugated diene compound monomer units, in which... | 05/29/2001 |
| 6221974 | Process for the preparation of creep-resistant polypropylene block copolymers The invention relates to a process for the preparation of a creep-resistant polypropylene by means of the following steps: (a) copolymerizing propylene and ethylene into a random copolymer at 40 to 110° C. using: a catalyst system of the above-mentioned ... | 04/24/2001 |
| 6197888 | Process for producing blends of syndiotactic 1, 2-polybutadiene and rubbery elastomers with an iron-based catalyst system 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 at least one rubbery elastomer by using an iron-based... | 03/06/2001 |
| 6187862 | Weatherable resinous composition having improved opacity and impact strength A thermoplastic molding composition comprising a grafted rubber and a copolymeric matrix is disclosed. The composition is characterized in that its grafted rubber includes a substrate, a first grafted phase and a subsequent grafted phase which are sequent... | 02/13/2001 |
| 6187721 | Lubricant for use in diesel engines Soot in a lubricated diesel engine is effectively dispersed without adversely affecting the viscosity of the lubricant by using a particular lubricant. The lubricant utilized comprises a lubricant base stock (e.g. more than 75% by weight), a dispersant (e... | 02/13/2001 |
| 6184283 | Rubber composition for tread A rubber composition for treads which contains silica and has a low electric resistance and further well-balanced characteristics such as a low rolling resistance, abrasion resistance and good wet performance can be obtained. The rubber composition compri... | 02/06/2001 |
