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| Number | Title | Issue Date |
| 7803883 | Hydrogenation of diene-based polymer latex The present invention relates to a process for the selective hydrogenation of the carbon-carbon double bonds in a diene-based polymer latex using a water-soluble catalyst and simultaneously a water-insoluble co-catalyst. ... | 09/28/2010 |
| 7799872 | Hydrogenation of diene-based polymer latex The present invention relates to a process for the hydrogenation of the carbon-carbon double bonds in a diene-based polymer latex in the absence of any organic solvent by a catalytically active system prepared in-situ based on a first main catalyst component and a s... | 09/21/2010 |
| 7439301 | Block copolymers having high flow and high elasticity Disclosed is an elastomeric hydrogenated block copolymer capable of being directly extruded or molded with a minimum of additives and having both high elasticity and low permanent set. The hydrogenated block copolymers have high melt flows allowing for ease in proce... | 10/21/2008 |
| 7408009 | Hydrogenation of polymers in the presence of supercritical carbon dioxide A method of hydrogenating a polymer comprises: (a) providing a dense phase, the dense phase comprising a polymer in a solvent; (b) providing a catalyst system, the catalyst system comprising as least one metal hydrogenation catalyst (preferably including nickel or r... | 08/05/2008 |
| 7309522 | Fibers made from block copolymer The present invention relates to compositions such as fibers, elastic yarns, wovens, nonwovens, knitted fabrics, fine nets, and articles produced at least in part from a styrenic block copolymer comprising at least two blocks produced from vinyl aromatic monomers an... | 12/18/2007 |
| 7282260 | Electrically conductive and electromagnetic radiation absorptive coating compositions and the like A coating composition having outstanding electrically conductive and electromagnetic radiation absorptive properties is disclosed with a water emulsion polymer binder. The binder is a blend of a first emulsion containing a conjugated diene as monomer or comonomer, a... | 10/16/2007 |
| 7282536 | Block copolymers and method for making same The present invention is a novel block copolymer containing a controlled distribution copolymer block of a conjugated diene and a mono alkenyl arene, where the controlled distribution copolymer block has terminal regions that are rich in conjugated diene units and a... | 10/16/2007 |
| 7268184 | Blockcopolymer compositions, having improved mechanical properties and processability and styrenic blockcopolymer to be used in them A composition to be used for the manufacture of fibers, filaments, melt blown or spun bond non-wovens or cast or blown films, comprising at least 50 wt % of a styrenic block copolymer; a polyolefin in an amount of from 10 to 30 wt %; a resin which is compatible with... | 09/11/2007 |
| 7265184 | Polymer hydrogenation process A process for hydrogenating unsaturations in polymers, the process comprising contacting at least one polymer having unsaturations with a catalyst comprising at least one Group Ia, Ib, IIb, VIb, VIIb or VIII metal on a support of an alkaline earth metal silicate hav... | 09/04/2007 |
| 7265185 | Process for hydrogenating carboxylated nitrile rubber, the hydrogenated rubber and its uses Polymers of a conjugated diene, an unsaturated nitrile and an α,β-unsaturated carboxylic acid are selectively hydrogenated to reduce carbon-carbon double bonds, without also reducing carboxyl groups and nitrile groups, using a rhodium-containing compound as cataly... | 09/04/2007 |
| 7241841 | Hydrogenated copolymers of unsubstituted and substituted conjugated dienes The random, hydrogenated copolymers according to the present invention of unsubstituted conjugated dienes and substituted conjugated dienes, having a glass transition temperature of ≦−60° C., an enthalpy of fusion of ≦100 J/g and a content of residual double ... | 07/10/2007 |
| 7208646 | Selective hydrogenation of butadiene A process for the selective hydrogenation of dienes in mixed streams of olefin containing hydrocarbons, such as butadiene in a mixed C4 stream with minimum loss of monoolefins is disclosed wherein the reactor is operated at conditions which induce pulse f... | 04/24/2007 |
| 7202308 | Hydrogenation method for unsaturated block copolymers and hydrogenated unsaturated block copolymers Use is made, for selectively hydrogenating the olefinic double bonds of block copolymers, at least one block of which comprises olefinic double bonds, using a catalyst based on a metal from Group VIII in a medium comprising an organic solvent for the copolymer and a... | 04/10/2007 |
| 7196034 | Nickel-iron-silica-alumina The invention is directed to a catalyst suitable for the hydrogenation of hydrocarbon resins, comprising a supported nickel on silica and alumina catalyst, said catalyst having a nickel content of 45 to 85 wt. %, a silicon content, calculated as SiO2, of ... | 03/27/2007 |
| 7186783 | Process for preparaing partially hydrogenated butadiene polymers The present invention relates to a process for preparing a partially hydrogenated butadiene polymer comprising no more than 3 mol % 1,2-butadiene-recurring units (A) and no more than 3 mol % ethylene recurring units (D), calculated on the total content mol/mol of re... | 03/06/2007 |
| 7179865 | Purification with reducing agents of vinyl polymers obtained by atom transfer radical polymerization This invention provides a method for purification of a vinyl polymer which comprises the atom transfer radical polymerization of a vinyl monomer using a transition metal complex as the polymerization catalyst, said... | 02/20/2007 |
| 7179864 | Polymer nano-strings A polymer nano-string composition is provided. The polymer nano-strings can include a poly(alkenylbenzene) core, and a surface layer comprising poly(conjugated diene). The nano-strings have a mean average diameter of less than about 100 nm and a length of greater th... | 02/20/2007 |
| 7176262 | Hydrogenated vinyl-polybutadienes The hydrogenated vinyl-polybutadienes according to the present invention have degrees of hydrogenation of from 20 to 100%, Mooney viscosities in the range of from 10 to 150 Mooney units (ML 1+4/100° C.), glass transition temperatures (Tg) of ≦−57° C... | 02/13/2007 |
| 7169850 | Block copolymers and method for making same The present invention is a novel block copolymer containing a controlled distribution copolymer block of a conjugated diene and a mono alkenyl arene, where the controlled distribution copolymer block has terminal regions that are rich in conjugated diene units and a... | 01/30/2007 |
| 7148292 | Method for hydrogenation of polymers in dispersed medium The invention concerns a method for hydrogenation of unsaturated polymers in dispersed medium based on an oxidation-reduction system containing hydrazine, an oxidant such as a peroxide and optionally a carboxylic acid. The hydrogenation rate can reach 100% in certai... | 12/12/2006 |
| 7140413 | Method of modifying a fluoropolymer and articles thereby A fluoropolymer is modified by contacting it with a modifying composition preparable from components comprising a phase transfer catalyst and at least one of a sulfide or disulfide salt, and heating the modifying composition. The modified fluoropolymer is useful in ... | 11/28/2006 |
| 7091284 | Hydrogenated nitrile rubbers with improved low-temperature properties Hydrogenated copolymers of an unsaturated nitrile, butadiene and isoprene, wherein the molar ratio of butadiene to isoprene is less than 3:1, display valuable low temperature properties. ... | 08/15/2006 |
| 7081501 | Hydrogenated ring-opening metathesis polymer and process for producing the same A hydrogenated ring-opening metathesis polymer containing at least structural units of the general formula [3] and/or the general formula [4] and the weight-average molecular weight Mw to the number-average molecular weight Mn (Mw/Mn) is more than 2.0 and less than ... | 07/25/2006 |
| 7053156 | Process for hydrogenating block copolymers Disclosed is a process for hydrogenating a block copolymer comprising admixing a block copolymer cement with hydrogen in the presence of a heterogeneous hydrogenation catalyst wherein the heterogeneous hydrogenation catalyst is a metal catalyst on a porous alumina s... | 05/30/2006 |
| 7048979 | Articles prepared from high molecular weight/low coupled block copolymers The present invention relates to articles prepared from novel anionic block copolymers of mono vinyl aromatics and conjugated dienes, and to blends of such block copolymers with other polymers. The block copolymer may be blended with at least one other polymer selec... | 05/23/2006 |
| 7049368 | Impact-modified compositions and method The present invention relates to a rubber modified thermoplastic resin composition comprising a discontinuous elastomeric phase dispersed in a rigid thermoplastic phase, wherein at least a portion of the rigid thermoplastic phase is grafted to the elastomeric phase,... | 05/23/2006 |
| 7037982 | Rubber mixtures for roll coverings This invention relates to a rubber mixture containing a carboxylated nitrile rubber, a metal salt of an acrylate, a liquid acrylate, a silane, optionally together with further additives, to a process for the production thereof and to use for moldings of all kinds, i... | 05/02/2006 |
| 7034084 | Process and apparatus for the hydrogenation of polymers under supercritical conditions The present invention provides a process for the hydrogenation of a polymer under supercritical conditions. A reaction mixture of hydrogen, at least one polymer, at least one hydrogenation catalyst, and appropriate solvent(s) for the at least one polymer and catalys... | 04/25/2006 |
| 7022784 | Synthetic lubricant composition and process A liquid polymer suitable for use as a lubricant base oil is produced by polymerizing ethylene and at least one alpha-olefin using a metallocene catalyst to provide a polymer which is then isomerized and hydrogenated to produce the liquid polymer. ... | 04/04/2006 |
| 6995226 | Open-ring copolymer, hydrogenated open-ring copolymer, process for production of both, and compositions A ring-opened metathesis copolymer and its hydrogenated product having a desired monomer unit ratio and a high molecular weight and having hydroxyl groups or hydroxycarbonyl groups can be obtained by conducting a ring-opening metathesis copolymerization of a norborn... | 02/07/2006 |
| 6986947 | Method of modifying a fluoropolymer and articles thereby A fluoropolymer is modified by contacting it with a modifying composition preparable from components comprising a phase transfer catalyst and at least one of a sulfide or disulfide salt, and heating the modifying composition. The modified fluoropolymer is useful in ... | 01/17/2006 |
| 6951906 | Process for hydrogenating a conjugated diene polymer This invention relates to a process for selectively hydrogenating the unsaturated double bonds of conjugated diene units of a homopolymer or copolymer. By using a highly active novel homogeneous organo titanium catalyst represented by formula (I) and lithium hydride... | 10/04/2005 |
| 6929769 | Nitrile rubber mixtures with a low tendency towards mold contamination The present invention relates to a process for reducing mold contamination in an injection molding process by using a mixture of nitrile rubbers, in the range of from 0.1-0.5 wt. % of fatty acids and optionally further additives. ... | 08/16/2005 |
| 6908970 | Process for producing hydrogenated product of cyclic olefin polymer prepared through ring-opening polymerization A process for producing a hydrogenated product of a polymer prepared through ring-opening polymerization which comprises a polymerization step of polymerizing a cyclic olefin through ring-opening polymerization in the presence of a polymerization catalyst comprising... | 06/21/2005 |
| 6888030 | Advances in amination Inclusion of a branched alcohol in the catalytic hydrogenation reaction involving an aliphatic nitro compound dramatically increases the efficiency of the conversion of nitro groups into amino groups. This discovery is of particular value in the production of polyal... | 05/03/2005 |
| 6881797 | Process for hydrogenation of conjugated diene polymer A process for hydrogenation of a conjugated diene polymer. The conjugated diene polymer in an inert organic solvent is brought into contact with hydrogen in the presence of a hydrogenation catalyst composition to selectively hydrogenate the unsaturated double bonds ... | 04/19/2005 |
| 6875818 | Polymer nano-strings A polymer nano-string composition is provided. The polymer nano-strings can include a poly(alkenylbenzene) core, and a surface layer comprising poly(conjugated diene). The nano-strings have a mean average diameter of less than about 100 nm and a length of greater th... | 04/05/2005 |
| 6875819 | Fluorinated cycloolefin polymers, processes for preparation of fluorinated cycloofefin monomers and polymers thereof, and use of the same The present invention is to provide a fluorine-containing polymer having excellent light transmission in the vacuum ultraviolet region of not more than 193 nm, a monomer favorably used for preparing the fluorine-containing polymer, a process for preparing the fluori... | 04/05/2005 |
| 6872785 | Multi-layer nano-particle preparation and applications A multi-layer nano-particle composition including a polymer core and at least two additional layers is provided. The nano-particles have a mean average diameter less than about 100 nm. The nano-particles can be modified via, for example, hydrogenation or functionali... | 03/29/2005 |
| 6841626 | Method for hydrogenating aromatic polymers in the presence of special catalysts A process for hydrogenating aromatic polymers is disclosed. The process entails using a supported catalyst wherein support contains alumina and where the catalyst comprise at least one metal of subgroup VIII of the Periodic Table. The catalyst is characterized in th... | 01/11/2005 |
