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7396887 Insitu removal of chelator from anionic polymerization reactions  
A process for producing polymers having at least one high vinyl end segment is provided. The process comprises: (a) forming a living prepolymer high vinyl initiator with a vinyl content greater...
7351777 Retarded anionic polymerization of vinyl aromatic monomers using insoluble or heterogeneous retardants  
This invention is a process to manufacture high quality vinyl aromatic polymer that is essentially free of unreacted vinyl aromatic monomer using retarded anionic polymerization wherein the...
7288612 Initiator composition and method for anionic polymerisation  
The invention relates to an initiator composition for anionic polymerization, comprising at least one alkali metal hydride selected from LiH, NaH, and KH, and at least one organylaluminum compound,...
7285605 Batch process for synthesizing rubbery polymers having a high trans microstructure content  
The present invention is directed to a batch process for synthesizing rubbery polymers, such as styrene-butadiene rubber, having a high trans microstructure. In one embodiment, the batch process...
7205360 Preparation process for block copolymers for tire tread compositions, and such copolymers  
A preparation process for a copolymer having two blocks usable in a sulphur-cross-linkable rubber composition of reduced hysteresis in the cross-linked state, such a block copolymer in which one of...
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%...
7125940 Conjugated diene polymers and copolymer blocks and process for preparing same  
Disclosed is a process for preparing polymers and copolymer blocks of conjugated dienes with varying amounts of branching comprising the use of a microstructure control agent and a microstructure...
7101941 Method for anionic polymerization of α-methylstyrene  
Process for preparing homopolymers of α-methylstyrene, or copolymers of α-methylstyrene and comonomers, by anionic polymerization in the presence of an initiator composition, which comprises...
7048023 Pneumatic tire having a component containing high trans styrene-butadiene rubber  
The invention is directed to a pneumatic tire having at least one component comprising a vulcanizable rubber composition, wherein the vulcanizable rubber composition comprises, based on 100 parts...
6878789 Preparation process of acrylic acid ester polymer  
A process for the preparation of an acrylic acid ester polymer, includes carrying out polymerization of an acrylic acid ester or block copolymerization of an acrylic acid ester and another...
6831144 Anionic polymerization process, and process for producing a polymer by the anionic polymerization process  
In anionic polymerization using an anionic polymerization initiator, a tertiary organoaluminum compound (A) having in the molecule thereof a chemical structure represented by a general formula:...
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...
6777511 Process for producing poly (meth) acrylates having reduced metal content  
An industrially excellent process for producing a poly(meth)acrylate having a reduced metal content which comprises contacting a mixture of a poly(meth)acrylate and an organic solvent with an...
6767976 Process for polymerizing a methacrylic ester or an acrylic ester  
(1) A methacrylic ester or an acrylic ester is anionically polymerized, using a polymerization initiator compound comprising an addition reaction product of a conjugated diene compound and an...
6758251 Pneumatic tire having a component containing high trans styrene-butadiene rubber  
The invention is directed to a pneumatic tire having at least one component comprising a vulcanizable rubber composition, wherein the vulcanizable rubber composition comprises, based on 100 parts...
6686423 Method for carrying out the anionic polymerization of vinylaromatic monomers  
In a process for the anionic polymerization of vinylaromatic monomers or dienes in the presence of a lithium organyl or lithium alcoholate and a magnesium and/or an aluminum compound, a sterically...
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...
6646075 High molecular weight perfluorocyclobutane polymers and method of making  
This invention relates to high molecular weight perfluorocyclobutane polymers and methods of polymerizing trifluorovinyl monomers to form high molecular weight perfluorocyclobutane polymers in the...
6630554 Process for polymerizing a methacrylic ester or an acrylic ester  
(1) A methacrylic ester or an acrylic ester is anionically polymerized, using a polymerization initiator compound comprising an addition reaction product of a conjugated diene compound and an...
6627715 Group IIa metal containing catalyst system  
The group IIa metal containing catalyst system of this invention can be utilized to synthesize rubbery polymers having a high trans microstructure by solution polymerization. Such rubbery polymers...
6624267 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...
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...
6534608 Support materials for use with polymerization catalysts  
The invention provides new olefin(s) polymerization catalyst systems, including graphite support. The invention also provides methods of preparing the catalyst system, and to the catalyst system's...
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...
6489415 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...
6476133 Method for producing a solution of diene polymers in vinyl aromatic compounds and method for producing resistant vinyl aromatic polymers by polymerizing the same solution  
A process for preparing a solution of high molecular weight polymers of conjugated dienes in a vinylaromatic hydrocarbon by anionic polymerization of the diene in the presence of an alkyllithium as...
6455651 Uniform initiation of anionic polymerization using organo-substituted alkali metal initiators  
The present invention is an improvement in a method of anionically polymerizing monomers by contacting them with an anionic polymerization initiator which is an organo-substituted alkali metal...
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...
6391981 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...
6388032 Cyclic olefin polymer containing little catalyst residue  
A cyclic olefin polymer having a small content of a catalyst residue, a production process for the same and use of the same as an optical material. Catalysts used for polymerization and/or...
6353056 Method for the production of block copolymers by retarded anionic polymerization  
In a process for the preparation of block copolymers from vinylaromatic monomers and dienes, the monomers are polymerized in the presence of at least one alkali metal organyl or alkali metal...
6350834 Method for retarded anionic polymerization  
In a process for the homopolymerization of vinylaromatic monomers or the copolymerization of vinylaromatic monomers and dienes in the presence of at least one alkali metal compound and at least one...
6329480 Preparation process of acrylic acid ester polymer  
A process for the preparation of an acrylic acid ester polymer, includes carrying out polymerization of an acrylic acid ester or block copolymerization of an acrylic acid ester and another...
6303721 Process for producing diene polymer solutions in vinyl aromatic monomers  
The anionic polymerization of dienes or copolymers of dienes and vinylaromatic monomers in a vinylaromatic monomer or monomer mixture to give homopolydienes or copolymers or mixed homopolydienes...
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...
6284905 Bridged metal complexes  
A Group 4 transition metal complex containing a boron or aluminum bridging group containing a nitrogen containing electron donating group, especially an amido group.
6271324 Method for preparing polyacryl(meth)acrylates  
Homopolymers, copolymers or block copolymers are prepared by anionic polymerization of acrylates and/or methacrylates in the presence of an initiator composition containing A) an organic alkali...
6214951 Cycloolefin copolymers having high tear strength and low optical attenuation  
Thermoplastic cycloolefin copolymers (COCs) having high tear strength and low optical attenuation, a process for their preparation, and their use as optical waveguides (optical fibers).
6150487 Multifunctional organic alkali metal initiator and its synthesis, anionic polymerized star polymers and their preparation  
6103846 Process for making anionic polymeric di-and polyfunctional polymers using protected functional initiators  
The preparation of di- or polyfunctional polymers by anionic polymerization using functionalized initiators having the structure R 1 R 2 R 3 Si--A--B, wherein each R is methyl and A is a...
5830961 Preparation of polyacrylates  
Polyacrylates based on alkyl acrylates or alkyl alkylacrylates or mixtures thereof as monomers are prepared in the presence of an initiator composition containing an alkali metal ester enolate and...
5753579 Trans microstructure directing initiator system  
The process of this invention can be utilized to synthesize polymers having a high trans microstructure. The polymers which can be prepared utilizing the procedure of this invention include high...
5741869 Addition polymers derived from norbornene-functional monomers and process therefor  
Addition polymers derived from norbornene-functional monomers are terminated with an olefinic moiety derived from a chain transfer agent selected from a compound having a terminal olefinic double...
5670592 System for priming the anionic polymerization of alkyl methacrylate  
The invention concerns the anionic polymerization of alkyl methacrylate in the presence of a priming system. The priming system comprises an organolithium primer and an organic compound of aluminum...
5571881 Addition polymers derived from norbornene-functional monomers and process therefor  
Addition polymers derived from norbornene-functional monomers are terminated with an olefinic moiety derived from a chain transfer agent selected from a compound having a terminal olefinic double...
5569730 Addition polymers derived from norbornene-functional monomers and process therefor  
Addition polymers derived from norbornene-functional monomers are terminated with an olefinic moiety derived from a chain transfer agent selected from a compound having a terminal olefinic double...
5508363 Preparation process of organosilicon compounds and production of silicon carbide  
Disclosed herein are a novel process for the preparation of alkylsilanes and alkenyl silanes by hydrosilylation of their corresponding silanes and unsaturated hydrocarbons in the presence or...
5468819 Process for making polymers containing a norbornene repeating unit by addition polymerization using an organo (nickel or palladium) complex  
A single component ionic catalyst consists essentially of an organonickel complex cation, and a weakly coordinating neutral counteranion. The cation is a neutral bidentate ligand removably attached...
5248737 Method of making amine/propylene copolymers  
Mono and diallyl amines are silylated to protect them from reacting with high activity Ziegler-Natta catalysts so they may be copolymerized with propylene; also disclosed are copolymers of such...
5216181 Liquid telechelic polymers having high 1,4-diene structure  
Liquid telechelic polymers are made from dienes and are produced via anionic polymerization. While having low molecular weight, for example less than 15,000, the telechelic polymers are generally...
Matches 1 - 50 out of 110 1 2 3 >