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| Number | Title | Issue Date |
| 7429549 | Process for improved coupling of rubbery polymers Rubbery polymers made by anionic polymerization can be coupled with tin halides or silicon halides to improve the characteristics of the rubber for use in some applications, such as fire treads. In cases where the rubbery polymer was synthesized utilizing a polar mo... | 09/30/2008 |
| 7405262 | Preparation of functionalized anionic polymerization initiators A process for preparing a functionalized polymerization initiator, the process comprising combining a functionalized styryl compound and an organolithium compound. ... | 07/29/2008 |
| 7285606 | Process for the preparation of a polyolefin The invention related to a process for the polymerization of at least one aliphatic or aromatic hydrocarbyl C2-20 mono- or multiolefin in the presence of a catalyst and a boron comprising co-catalyst, wherein the catalyst comprises a composition of a metal-organic r... | 10/23/2007 |
| 7235510 | Catalysts A tethered ligand comprising the reaction product of an organofunctional silica and a ligand containing a functional group capable of reaction with said organofunctional silica, wherein the organofunctional silica is prepared from an alkyl silicate and an organofunc... | 06/26/2007 |
| 7153916 | Transition metal compound, catalyst for polymerization of olefin, and process for polymerization of ofelin using the catalyst Catalyst for polymerization of an olefin is provided, which comprises (A) a transition metal compound having a carbon-metal bond structure and (B) an activating co-catalyst, or (A) a transition metal compound having a carbon-metal bond structure, (B) an activating c... | 12/26/2006 |
| 7144614 | Polyester polymerization catalyst, polyester produced by using the same, and process for producing polyester This invention provides a novel polymerization catalyst other than antimony compounds, polyester produced by using the same and a process for producing polyester. The polycondensation catalyst of this invention is a polyester polymerization catalyst comprising an al... | 12/05/2006 |
| 7087549 | Calcium-based catalyst system This invention reveals a catalyst system for use in isothermal polymerizations which consists essentially of (a) an organolithium compound, (b) a calcium alkoxide and (c) a lithium alkoxide. The subject invention further discloses a process for synthesizing a random... | 08/08/2006 |
| 7049265 | Organic anion catalyst system for foams Disclosed herein are compositions useful for introducing metal carboxylate salts as catalysts into systems useful for producing polyurethane and polyisocyanurate foams. The methods permit the introduction of such catalysts in the absence of substantial amounts of wa... | 05/23/2006 |
| 7005486 | Catalyst for addition polymerization, and process for producing addition polymer with the same A catalyst for addition polymerization obtained by contacting (A) an organoaluminum compound, (B) a specific boron compound and (C) a solid inorganic compound, and a process for producing an addition polymer characterized by polymerizing an addition-polymerizable mo... | 02/28/2006 |
| 6943250 | Protected aminofunctionalized polymerization initiators and methods of making and using same Anionic polymerization initiators useful in the preparation of polymers having a protected amine functional group. The amine functionality is part of a heterocyclic radical and includes a protecting group. ... | 09/13/2005 |
| 6867162 | Double-metal cyanide catalysts which can be used to prepare polyols and the processes related thereto The present invention is directed to double metal cyanide catalysts (“DMC”) which are prepared by combining i) at least one metal salt; ii) at least one metal cyanide salt; iii) at least one organic complexing ligand; iv) at least one alkali metal salt; and, opt... | 03/15/2005 |
| 6861011 | Process for preparing methyllithium Methyllithium is prepared by reacting chloromethane with a dispersion lithium metal in an aromatic organic solvent with methyltetrahydrofuran. ... | 03/01/2005 |
| 6835798 | Method of producing polycarbonates A process for the preparation of polycarbonate by the phase boundary process is disclosed. The process entails reacting at least one dihydroxydiarylalkane in the form of its alkali metal salts with phosgene in the heterogeneous phase in the presence of sodium hydrox... | 12/28/2004 |
| 6825149 | Highly selective shell impregnated catalyst of improved space time yield for production of vinyl acetate A shell impregnated catalyst of Pd-Au produced on a silica support to have a Pd loading of 1.8 g/L of catalyst to about 7.2 g/L and a Au to Pd weight ratio of 0.3 to 2.0 by impregnating the support with aqueous solutions of palladium and gold salts or acids and ther... | 11/30/2004 |
| 6800582 | Process of preparation of amino functionalized diene polymers, polymers of such type, rubber composition and tire casing containing those polymers The present invention provides a process for preparing amino functionalized diene polymers with 1,4-trans linkage content equal to or greater than 70%. The invention also concerns polymers of such type, a rubber composition and a tire casing containing those polymer... | 10/05/2004 |
| 6770587 | Chain extended functionalized initiators and methods of preparing and using the same The present invention provides protected functionalized polymerization initiators having less than one molar equivalent chain extension agent introduced therein to provide hydrocarbon solubility. ... | 08/03/2004 |
| 6677267 | Polymerization catalysts The present invention relates to a process for the polymerization and copolymerization of 1-olefins and to a catalyst to be used in said process wherein the catalyst comprises (1) a complex having formula (I) wherein M is Fe[II], Fe[III], Co[I], Co[II], C... | 01/13/2004 |
| 6613858 | Solution of dilithium polymerization initiator A block copolymer having narrow molecular weight distribution and excellent symmetrical property or a telechelic polymer having, equally at both terminals thereof, a functional group can be produced by using a polymerization initiator solution which compr... | 09/02/2003 |
| 6610814 | Compounds of antimony and germanium as catalysts for melt polycarbonate The present invention relates to a synthetic method in which one or more diaryl carbonates is reacted with one or more dihydroxy aromatic compounds in the presence of a transesterification catalyst under melt polymerization conditions to afford a product ... | 08/26/2003 |
| 6608154 | Process for synthesizing trans polydiene rubber The process and catalyst system of this invention can be utilized to synthesize polybutadiene rubber having a high trans content and a low melting point by solution polymerization. The trans-polybutadiene rubber made by the process of this invention can b... | 08/19/2003 |
| 6608164 | Salts of heterocyclic diols as catalysts for melt polycarbonate The present invention relates to a synthetic method in which one or more diaryl carbonates is reacted with one or more dihydroxy aromatic compounds in the presence of a transesterification catalyst under melt polymerization conditions to afford a product ... | 08/19/2003 |
| 6605564 | Compositions providing improved functionalization of terminal anions and processes for improved functionalization of terminal anions Compositions including one or more anionic polymerization initiators and one or more additives for improving functionalizing efficiency of living polymer anions are disclosed. The present invention also provides compositions including one or more electrop... | 08/12/2003 |
| 6583244 | Synthesis of rubber having a low vinyl content Metal salts of cyclic alcohols can be used as modifiers in lithium initiated solution polymerizations of diene monomers into rubbery polymers having a low vinyl content. For instance, such initiator systems can be used in the copolymerization of styrene a... | 06/24/2003 |
| 6566478 | Synthesis of high vinyl rubber This invention is based upon the discovery that rubbery polymers having a high vinyl content and a low degree of branching can be synthesized with an initiator system that is comprised of (a) a lithium initiator selected from the group consisting of allyl... | 05/20/2003 |
| 6562923 | Process for the preparation of a dilithiated initiator and anionic polymerization process The present invention relates to a process for the preparation of a dilithiated initiator usable in anionic polymerization, a process for the preparation by anionic polymerization of a living diene elastomer which is provided with a carbon-lithium group a... | 05/13/2003 |
| 6518214 | Synthesis of functionalized lithium initiator This invention discloses a process for making dilithium initiators in high purity. This process can be conducted in the absence of amines which is desirable since amines can act as modifiers for anionic polymerizations. The dilithium compounds made are hi... | 02/11/2003 |
| 6489262 | Initiation system and process for anionic (co) polymerization of (Meth) acrylic, vinylaromatic and/or diene monomers The present invention relates to an initiation system composed of the reaction product of at least one cyclic siloxane and at least one organometalic compound of sufficient reactivity to open the siloxane ring. Application of the present invention is to the pr... | 12/03/2002 |
| 6444762 | Anionic polymerization process A process for the continuous anionic polymerization or copolymerization of styrene or diene monomers using an alkali metal alkyl compound as polymerization initiator is carried out in the presence of an alkyl- or arylmetal compound of an element which occ... | 09/03/2002 |
| 6444767 | Method for retarded anionic polymerization In a process for the homopolymerization of vinylaromatic monomers or the copolymerization of vinylaromatic monomers and dienes, the monomers are polymerized in the presence of at least one alkali metal organyl, at least one magnesium organyl and at least ... | 09/03/2002 |
| 6429273 | Process for the preparation of vinylic polymers, polymerization initiator for vinylic monomers, and styrene resin composition A process for producing a vinyl polymer which comprises carrying out anionic polymerization under the condition that the polymerization temperature is not lower than 45° C. and not higher than 250° C. and the concentration of the vinyl monomer based on ... | 08/06/2002 |
| 6420308 | Highly selective shell impregnated catalyst of improved space time yield for production of vinyl acetate A shell impregnated catalyst of Pd--Au produced on a silica support to have a Pd loading of 1.8 g/L of catalyst to about 7.2 g/L and a Au to Pd weight ratio of 0.3 to 2.0 by impregnating the support with aqueous solutions of palladium and gold salts or ac... | 07/16/2002 |
| 6417364 | Polymerization of ethylene Ethylene is polymerized by novel nickel or iron complexes of selected novel 2,2-bipyridine-6-imines, optionally with the addition of other cocatalysts. The polymers are useful for films and molding resins.... | 07/09/2002 |
| 6384150 | Anionic polymerization initiators for preparing macro-branched diene rubbers Novel solid supported anionic polymerization initiators that are multiply metalated with Group IA alkali metal atoms are provided and employed to produce extremely high molecular weight branched diene polymers. The initiators are prepared by metalating a ... | 05/07/2002 |
| 6349753 | Aminoalkyllithium compounds containing cyclic amines and polymers therefrom A tire component comprising a plurality of elastomers, where at least one of said elastomers has a functional group defined by the formula ##STR1## where R1 is selected from the group consisting of a divalent alkylene group, an oxy-alkylene gro... | 02/26/2002 |
| 6344429 | Oil soluble coking additive, and method for making and using same A method for making an oil soluble coking process additive, includes the steps of: providing mixture of a metal salt in water wherein the metal salt contains a metal selected from the group consisting of alkali metals, alkaline earth metals and mixtures t... | 02/05/2002 |
| 6319875 | Initiation system comprising a silylated initiator for anionic (co)polymerization of (meth)acrylic monomer(s) and process using same The initiation system comprises (1) at least one silylated initiator and (2) at least one alkaline metal alcoholate as ligand. The silylated initiator may be monofunctional and selected in particular from among the compounds of Formula (I) or difunctional... | 11/20/2001 |
| 6300441 | Method for the production of an initiator composition for retarded anionic polymerization Disclosed are a process for the preparation of an initiator composition comprising an alkali metal organyl and an aluminum organyl and a process for the polymerization of anionically polymerizable monomers.... | 10/09/2001 |
| 6284701 | Metallocene catalysts for olefin polymerization and method of polymerizing olefins using the metallocene catalysts The new metallocene catalysts according to the present invention are prepared by reacting a metallocene compound with a compound having at least two functional groups. The metallocene compound is a transition metal compound, which is coordinated with a ma... | 09/04/2001 |
| 6225415 | Process to selectively place functional groups within polymer chain Polymers are produced by alternate anionic polymerization of conjugated dienes and/or monomalkenyl arenes to form a living polymer chain, followed by precise incorporation of protected functional groups into that living polymer chain.... | 05/01/2001 |
| 6184168 | Synthesis of 1,4-trans-polybutadiene using a lanthanide organic acid salt catalyst The invention provides a catalyst composition, comprising: (a) an organolithium compound; and, (b) an organic acid salt of lanthanide series element; wherein: (1) only components (a) and (b) are required to promote the synthesis of 1,4-trans-polybutadiene... | 02/06/2001 |
