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| Number | Title | Issue Date |
| 7423101 | Catalyst composition and use thereof The present invention is directed toward Group 4, 5, 6, 7, 8, 9, 10 or 11 transition metal compounds containing neutral, mono- or di-anionic tridentate nitrogen/oxygen based ligands that are useful, with or without activators, to polymerize olefins, particularly α-... | 09/09/2008 |
| 7335706 | Method of making alkoxy functionalized rubbery polymers The present invention is directed to a method for synthesizing rubbery copolymers, such as styrene-butadiene rubber, or rubbery homopolymers, such as polybutadiene rubber, that are alkoxy functionalized, e.g., alkoxysilane functionalized, and provide desirable dispe... | 02/26/2008 |
| 7317057 | Catalyst composition and use thereof The present invention is directed toward Group 4, 5, 6, 7, 8, 9, 10 or 11 transition metal compounds containing neutral, mono- or di-anionic tridentate nitrogen/oxygen based ligands that are useful, with or without activators, to polymerize olefins, particularly α-... | 01/08/2008 |
| 7250476 | Multi-functional polymers A multi-functional polymer defined by the formula (Q—RnZ—P2—Y where (Q—R)n is a functionality cluster, Q is a functional group, R is a multi-valent organic group, P2 is a long-chain p... | 07/31/2007 |
| 7189791 | Catalyst composition II This invention relates to a transition metal catalyst compound represented by the formula: LMX2 or (LMX2)2 wherein each M is independently a Group 7 to 11 metal, preferably a Group 7, 8, 9, or 10 metal; each L is, independently, a tr... | 03/13/2007 |
| 7189792 | Catalyst for synthesizing high trans polymers The process and catalyst of this invention can be utilized to synthesize homo and copolymers of conjugated diene monomers and vinyl aromatic monomers having high trans contents of greater than 60% with low melting points. These homo and copolymers of conjugated dien... | 03/13/2007 |
| 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 |
| 7037994 | Acenaphthylene derivative, polymer, and antireflection film-forming composition Novel compounds acetoxymethylacenaphthylene and hydroxymethylacenaphthyleneare disclosed. A polymer prepared from these novel compounds containing a structural unit of the formula (3), wherein R1 is a hydroge... | 05/02/2006 |
| 7019084 | Tire with rubber composition The present invention relates to the preparation of rubber compositions for tire tread and tire sidewall component applications. A tire is provided having tread of such composition designed for relatively heavy loads such as, for example, truck tires. A tire having ... | 03/28/2006 |
| 6977276 | Oil extended rubber and composition containing low PCA oil The invention is directed to an oil extended rubber and composition comprising: a solution polymerized elastomer derived from isoprene and optionally at least member of the group consisting of conjugated dienes and vinyl aromatic monomers; and from about 5 to about ... | 12/20/2005 |
| 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 |
| 6670435 | Process for synthesizing trans-1,4-polybutadiene 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... | 12/30/2003 |
| 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 |
| 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 |
| 6506862 | Process for the preparation of a diene elastomer by anionic polymerization The present invention provides a process for the preparation of a diene elastomer having a reduced amount of vinyl linkages, by anionic polymerization of one or more monomers comprising at least one conjugated diene monomer. The process for preparing the ... | 01/14/2003 |
| 6359088 | Calcium-based catalyst system The process and catalyst system of this invention can be utilized to synthesize a highly random styrene-butadiene rubber having a high trans content by solution polymerization. The styrene-butadiene rubber made by the process of this invention can be util... | 03/19/2002 |
| 6162873 | Aromatic vinyl-conjugated diene block copolymer and production process thereof Disclosed herein are an aromatic vinyl-conjugated diene block copolymer composed of a bound aromatic vinyl unit and a bound conjugated diene unit and containing at least a block aromatic vinyl segment, wherein: (1) a content of the bound aromatic vinyl unit in... | 12/19/2000 |
| 6140434 | Synthesis of high vinyl rubber Metal salts of saturated aliphatic alcohols can be used as modifiers in lithium initiated solution polymerizations of diene monomers into rubbery polymers. Sodium t-amylate is a preferred modifiers because of its exceptional solubility in non-polar alipha... | 10/31/2000 |
| 6103842 | Process and catalyst system for synthesizing random trans SBR with low vinyl microstructure The process and catalyst system of this invention can be utilized to synthesize a highly random styrene-butadiene rubber having a high trans content by solution polymerization. The styrene-butadiene rubber made by the process of this invention can be util... | 08/15/2000 |
| 6046288 | Method of preparing a polymer using aliphatic solutions of aminoalkyllithium compounds A method for reducing the amount of aliphatic solvent needed for maintaining aminoalkyllithium initiators in solution comprising the step of combining at least one aminoalkyllithium compound with a second, dissimilar lithioamine.... | 04/04/2000 |
| 5986010 | Polymer for asphalt cement modification This invention discloses a process for synthesizing a styrene-butadiene polymer, which is particularly useful for modifying asphalt to improve force ductility, elastic recovery, toughness and tenacity, by a process which comprises the steps of: (1) contin... | 11/16/1999 |
| 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 |
| 5919870 | Functional telechelic star polymers Protected functional initiators have been demonstrated to polymerize dienes and alkenyl substituted aromatics. The resultant living anions were linked with a coupling agent, such as divinylbenzene or tin tetrachloride, to afford a protected functionalized... | 07/06/1999 |
| 5916962 | Rubber composition including a diene copolymer A rubber composition having good breaking properties, high tanδ, good wear resistance and a method for preparing a copolymer used in the rubber composition. The copolymer is a butadiene-styrene copolymer prepared in the presence of an organopotassium com... | 06/29/1999 |
| 5744558 | 1,5-diethenylnaphthalene compounds and bifunctional primers for anionic polymerization prepared therefrom Bifunctional primer naphthalene compounds having the formula: ##STR1## wherein M" is an alkali metal, preferably sodium or lithium, and R1 and R2 are, e.g., alkyl radicals, are prepared from corresponding 1,5-diethenylnaphthalen... | 04/28/1998 |
| 5723559 | Initiating process and system for the anionic polymerisation of acrylic monomers This invention relates to an initiating system for the anionic polymerization of acrylic monomers, and where necessary vinyl comonomers, including at least one R-M initiator in which M is a metal chosen from among the alkali and alkaline earth metals and ... | 03/03/1998 |
| 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 |
| 5686534 | Initiation system for the anionic polymerisation of (meth)acrylic monomers An initiation system for the anionic polymerization of (meth)acrylic monomers and, optionally, nonacrylic vinyl monomers is disclosed. The initiation system comprises (1) a functional initiator and (2) an alkali metal alcoholate having the formula R'OM', ... | 11/11/1997 |
| 5677399 | Synthesis of macrocyclic polymers with group IIA and IIB metal cyclic organometallic initiators The invention is a practical process for anionically synthesizing commercially significant quantities of macrocyclic polymers from polar and/or non-polar monomers by using Group IIA and IIB metal cyclic organometallic initiators. Activation of the ring me... | 10/14/1997 |
| 5674799 | 1,5-diethenylnaphthalene compounds and bifunctional primers for anionic polymerization prepared therefrom Bifunctional primer naphthalene compounds having the formula: ##STR1## wherein M" is an alkali metal, preferably sodium or lithium, and R1 and R2 are, e.g., alkyl radicals, are prepared from corresponding 1,5-diethenylnaphthalen... | 10/07/1997 |
| 5629393 | Initiating process and system for the anionic polymerization of acrylic monomers The initiating system for the anionic polymerization of acrylic monomers, and where necessary, vinyl comonomers, including at least one R-M initiator in which M=a metal chosen from among the alkaline and alcaline earth metals and R=an alkyl with a linear ... | 05/13/1997 |
| 5625017 | Process for preparing a polymer using lithium initiator prepared by in situ preparation A process for preparing a polymer comprises polymerizing a conjugated diene monomer and/or a vinylaromatic hydrocarbon monomer in a hydrocarbon solvent in the presence of or in the absence of a randomizer by using a lithium polymerization initiator which ... | 04/29/1997 |
| 5595951 | Process for preparing a multilithio initiator for improved tire rubbers The subject invention discloses a process for preparing an initiator which contains a plurality of lithium atoms and which is particularly useful for initiating the polymerization of diolefin monomers into rubbery polymers; said process being comprised of... | 01/21/1997 |
| 5552499 | Process of preparing reduced hysteresis products using anionic polymerization initiators The present invention is directed toward anionic polymerization employing lithio amines mixed with an organic alkali metal compound and optionally, a chelating reagent. The lithio amines have the general formula (A)Li(SOL)y, where SOL is a solu... | 09/03/1996 |
| 5550200 | Method of producing conjugated diene-aromatic vinyl hydrocarbon copolymers A rubber composition, having good breaking properties, high tanδ, good wear resistance and a method for preparing a copolymer used in the rubber composition. The copolymer is a butadiene-styrene copolymer prepared in the presence of an organopotassium co... | 08/27/1996 |
| 5527860 | Process for producing a diolefin polymer or copolymer and a rubber composition containing such a diolefin polymer or copolymer A process for producing a diolefin polymer or copolymer, comprising the steps of polymerizing 55-100 wt % of a conjugated diolefin with 0-45 wt % of an aromatic vinyl compound as monomers in a hydrocarbon as a solvent, by using initiators: a reaction prod... | 06/18/1996 |
| 5476904 | Thermoplastic elastomers having improved heat resistance comprising conjugated diene/methyl methacrylate block copolymers Thermoplastic, elastomeric, conjugated diene (e.g., butadiene)/methyl methacrylate block copolymers having elevated Tg and improved impact strength, well suited as polymer impact strength-modifiers and for conversion into pressure-sensitive adhesives, are... | 12/19/1995 |
| 5300599 | Modifier for anionic polymerization of diene monomers It has been unexpectedly discovered that salts of tetrahydrofurfuryl alcohols, such as the lithium, potassium, and sodium salts of tetrahydrofuryl alcohols, can be used to modify anionic polymerizations of conjugated diene monomers. These modifiers can be... | 04/05/1994 |
| 5284927 | Process for preparing a rubbery terpolymer of styrene, isoprene and butadiene The subject invention relates to a technique for synthesizing rubbery terpolymers of styrene, isoprene and butadiene. These rubbery terpolymers exhibit an excellent combination of properties for utilization in tire tread rubber compounds. By utilizing suc... | 02/08/1994 |
