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| Number | Title | Issue Date |
| 8076430 | Living radical polymerization promoter An organobismuth compound represented by the formula (1) and a method for preparing a living radical polymer using the organobismuth compound. In the formula (1), R1 to R3 each represent a C1-C8 alkyl group, an aryl group, a substituted aryl gr... | 12/13/2011 |
| 7847043 | Organic bismuth compound, method for producing same, living radical polymerization initiator, method for producing polymer using same, and polymer An organobismuth compound represented by the formula (1) wherein R1 and R2 are C1-C8 alkyl, aryl, substituted aryl or an aromatic heterocyclic group, R3 and R4 | 12/07/2010 |
| 7423100 | Polymerization processes The invention provides for polymerization processes to produce polymers utilizing boiling pool reactor systems and diluents including hydrofluorocarbons. ... | 09/09/2008 |
| 7414101 | Polymerization processes The invention provides for a process to produce polymers utilizing a hydrofluorocarbon diluent. ... | 08/19/2008 |
| 7399814 | Living radical polymerization method A highly active and environment-friendly catalyst for use in a living radical polymerization is provided. A catalyst for use in a living radical polymerization method is provided. The catalyst comprises a central element, which is selected from germanium, tin... | 07/15/2008 |
| 7309756 | Methods for converting linear polyesters to macrocyclic oligoester compositions and macrocyclic oligoesters Macrocyclic oligoesters and compositions comprising macrocyclic oligoesters are prepared from intermediate molecular weight polyesters. In one embodiment, a diol is contacted with a dicarboxylic acid or a dicarboxylate in the presence of a catalyst to produce a comp... | 12/18/2007 |
| 7232872 | Polymerization processes The invention provides for a process to produce polymers utilizing a hydrofluorocarbon diluent. ... | 06/19/2007 |
| 7202317 | Polymerization of i-butene in hydrocarbon media using bis(borane) co-initiators A method is provided for cationically polymerizing olefin monomer by using a novel coinitiator in the presence of water. More specifically, a method is provided for cationically polymerizing olefin monomer by using a novel coinitiator in an aqueous suspension or aqu... | 04/10/2007 |
| 7196149 | Polymerization of i-butane in hydrocarbon media using bis(borane) co-initiators A method is provided for cationically polymerizing olefin monomer by employing the step of using a novel coinitiator in an organic phase or a neat monomer reaction phase. More specifically, a method is provided for cationically polymerizing olefin monomer by employi... | 03/27/2007 |
| 7151143 | Blends containing macrocyclic polyester oligomer and high molecular weight polymer The invention provides blends of macrocyclic polyester oligomer (MPO) with high-molecular-weight polymer and polymerization catalyst as friable, one-component, ready-to-polymerize materials with long shelf life. The invention also provides methods for preparation an... | 12/19/2006 |
| 7071291 | Isolation, formulation and shaping of macrocyclic oligoesters Processes for isolating, formulating, and shaping macrocyclic oligesters were developed which allow efficient production of macrocyclic oligoesters substantially free from solvent, which may include additives, fillers, and catalysts. ... | 07/04/2006 |
| 7064166 | Process for monomer sequence control in polymerizations The present invention relates to a polymerization process for the control of the microstructure of polymers and to novel copolymers. An embodiment of the present invention relates a process of polymerizing first and second monomers in the presence of a complex compr... | 06/20/2006 |
| 7041760 | Process for production of butyl rubber The present invention relates to a process for producing polymers containing repeating units derived from at least one isoolefin monomer, optionally repeating units derived from at least one multiolefin monomer and optionally further copolymerizable monomers in the ... | 05/09/2006 |
| 7022806 | Methods for converting linear polyesters to macrocyclic oligoester compositions and macrocyclic oligoesters Macrocyclic oligoesters and compositions comprising macrocyclic oligoesters are prepared from intermediate molecular weight polyesters. In one embodiment, a diol is contacted with a dicarboxylic acid or a dicarboxylate in the presence of a catalyst to produce a comp... | 04/04/2006 |
| 6994914 | Macrocyclic polyester oligomers and processes for polymerizing the same A water slurry process is used to prepare a prepreg and to manufacture articles from macrocyclic polyester oligomers. In one embodiment, a process for preparing a water suspension of macrocyclic polyester oligomers includes the steps of contacting a macrocyclic poly... | 02/07/2006 |
| 6962968 | Purification of macrocyclic oligoesters Acid impurities, such as carboxylic acid-terminated polymers, are removed from macrocyclic oligoesters with ion exchange resins, resulting in macrocyclic oligoesters that are substantially free of acid impurities. The ion exchange resins can be regenerated anew and ... | 11/08/2005 |
| 6960626 | Intimate physical mixtures containing macrocyclic polyester oligomer and filler The invention provides intimate physical mixtures of macrocyclic polyester oligomer (MPO) and filler, as well as methods for their preparation and use. Improved dispersion of filler in a polymer matrix is achieved upon polymerization, and larger amounts of filler wi... | 11/01/2005 |
| 6906147 | Catalytic systems This invention relates to single-component and multi-component catalytic systems using aryl titanates. Aryl titanate compounds are useful as catalysts and co-catalysts in single-component and multi-component catalytic systems (e.g., for the polymerization of macrocy... | 06/14/2005 |
| 6884859 | Ring-opening metathesis polymerization of bridged bicyclic and polycyclic olefins containing two or more heteroatoms A method is provided for synthesizing a polymer in a controlled fashion using a ring-opening metathesis polymerization (ROMP) reaction, wherein polymerization is carried out using a catalytically effective amount of an olefin metathesis catalyst and a bridged bicycl... | 04/26/2005 |
| 6864325 | Romp with oligomeric UV-absorbers The invention relates to metathesis polymers wherein an aromatic group that has UV-light absorbing properties is attached with a bridge group to the polymer. Also disclosed is a polymerizable composition comprising a catalytically effective amount of a penta- or hex... | 03/08/2005 |
| 6803429 | Selective ring-opening cross-metathesis of cycloolefins A catalytic method is provided for a ring-opening cross-metathesis reaction between a cycloolefinic substrate and a second olefinic reactant, wherein the catalyst used is a transition metal alkylidene complex substituted with an N-heterocyclic carbene ligand. The su... | 10/12/2004 |
| 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 |
| 6800705 | Catalytic system, its method for preparation and method for preparation of a copolymer of ethylene and a conjugated diene The present invention provides to a catalytic system, its method for preparation, and a method for preparation of a copolymer of ethylene and a conjugated diene, which uses this catalytic system. A catalytic system according to the invention comprises: an org... | 10/05/2004 |
| 6787661 | Tin-containing organolithium compounds and preparation thereof The present invention relates to a tin-containing organolithium compound which can be used as anionic polymerization initiators, represented by the following formula (1): R4−xSn(Ya—Zm—Yb—Li)x | 09/07/2004 |
| 6624265 | Ruthenium metal alkylidene complexes coordinated with triazolylidene ligands that exhibit high olefin metathesis activity The invention discloses ruthenium alkylidene complexes of the type (PCy3)(L)Cl2 Ru(CHPh), where L is a triazolylidene ligand of the general formula: ##STR1## These catalysts have been found to be considerably more active for olefin ... | 09/23/2003 |
| 6583247 | Process for producing free radical polymerized copolymers Process for the copolymerization of free radical polymerizable comonomers such as vinyl acetate with an unsaturated diester such as diakyl fumarate which is carried out in the presence of water to produce copolymers such as fumarate vinyl acetate copolyme... | 06/24/2003 |
| 6437187 | Compounds having an ionic structure used as constituent of an olefin polymerization catalyst Novel chemical compounds have an ionic structure and in combination with an organometallic transition metal compound form a catalyst system which is advantageously used for the polymerization of olefins.... | 08/20/2002 |
| 6399727 | Heteroleptic alkaline-earth metal compounds and methods for carrying out stereoselective anionic polymerization Polymerization initiator comprising an alkaline earth metal compound chosen from the group a) of heteroleptic alkaline earth metal compounds of the formula I L--M--R (I) or b) of cationic alkaline earth metal complexes of the formula II [D.fwdarw.M--R]+ | 06/04/2002 |
| 6291389 | Cationic polymerization catalysts A cationic catalyst composition comprising a reactive cation and a compatible non-coordinating anion is preferably used at a temperature of 20° C. or less to produce olefin polymers, particularly polymers and copolymers of isobutylene.... | 09/18/2001 |
| 6255420 | Start-up process for gas phase production of polybutadiene A process for starting a polymerization of butadiene to produce polybutadiene in a gas phase reactor having a seed bed which comprises (i) passivating the reactor and the seed bed by introducing an aluminum alkyl having a concentration ranging from about ... | 07/03/2001 |
| 6143851 | Process for preparation of addition products of difunctional telechelic polyolefins from cyclic olefins by olefin metathesis reaction A process for the preparation of an addition product of a linear telechelic difunctional unsaturated polymer containing terminal functional reactive groups other than vinyl groups, involves simultaneously reacting at least one cyclic olefin of from about ... | 11/07/2000 |
| 6107408 | Processes for improving linking efficiencies in the synthesis of star polymers Processes for the synthesis of star or multi-branched polymers and the resultant polymers. One or more alkadiene monomers are polymerized in the presence of suitable organometallic initiators and subsequently coupled to form star polymers. Prior to coupli... | 08/22/2000 |
| 6008307 | Process for producing olefin polymers using cationic catalysts A cationic catalyst composition comprising a reactive cation and a compatible non-coordinating anion used at a temperature of 20° C. or less to produce olefin polymers, particularly polyisobutylene is disclosed.... | 12/28/1999 |
| 5977393 | Schiff base derivatives of ruthenium and osmium olefin metathesis catalysts The present invention generally relates to ruthenium and osmium carbene catalysts for use in olefin metathesis reactions. More particularly, the present invention relates to Schiff base derivatives of ruthenium and osmium carbene catalysts and methods for... | 11/02/1999 |
| 5973086 | Process for the living anionic polymerization of alkyl (methacrylic) monomers using a novel initiator system A process for the living anionic polymerization of alkyl(meth)acrylic monomers, involving polymerizing the monomers in the presence of an initiator comprising a carbanion and a metal or nonmetal salt of perchloric acid. The initiator has the formula (I): ... | 10/26/1999 |
| 5936029 | Macrocyclic polymers having low hysteresis compounded properties The present invention provides a method of anionic synthesis of stable macrocyclic polymers that are compounded to form vulcanizable elastomeric compounds exhibiting reduced hysteresis properties. Cyclic organometallic compounds containing divalent metal ... | 08/10/1999 |
| 5877336 | Synthesis of tributyltin lithium Triorgano substituted-tin lithium initiators are made in a dimethyl ether solvent. The substitution of dimethyl ether as the solvent for the traditional tetrahydrofuran solvent results in an initiator for anionic polymerizations that can produce less 1,2-... | 03/02/1999 |
| 5847055 | Polymer-containing catalyst systems A catalyst system of the formula I X M (Z1)z.sbsb.1 (Z2)z.sbsb.2 (Z3)z.sbsb.3 I where X is C1 -C10 -alkyl, 5- to 7-membered cycloalkyl, C1 -C10 -alkox... | 12/08/1998 |
| 5744560 | Metal accelerated polymerization processes A free radical polymerization process for the preparation of a polymer comprising heating a mixture of a free radical initiator, a stable free radical agent, a metal catalyst, or a metal stable free radical complex catalyst, and at least one polymerizable... | 04/28/1998 |
| 5700888 | Synthesis of macrocyclic polymers having low hysteresis compounded properties The present invention provides a method of anionic synthesis of stable macrocyclic polymers that are compounded to form vulcanizable elastomeric compounds exhibiting reduced hysteresis properties. Cyclic organometallic compounds containing divalent metal ... | 12/23/1997 |
