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7470760 |
Diene elastomers with cyclic vinyl units and processes for obtaining same
The present invention relates to a linear or branched diene elastomer having cyclic vinyl units. A linear diene elastomer according to the invention results from at least one conjugated diene and...
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7462677 |
Sulfur containing initiators for anionic polymerization of monomers
An initiator is presented for anionically polymerizing monomers, to provide a functional head group on the polymer. A polymer having a functional head group derived from a sulfur containing anionic...
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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.
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7354531 |
Polymer electrolyte composition
A composition for use as a polymer electrolyte, wherein said composition includes one or more polar materials and one or more polyesters of formula III,
wherein each unit A may be identical or...
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7291687 |
Catalyst system for synthesizing rubbery polymers having a high trans microstructure content
The present invention is directed to a catalyst system for synthesizing rubbery polymers, such as polybutadiene rubber and styrene-butadiene rubber, having a high trans microstructure. The catalyst...
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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%...
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7153919 |
Use of sulfur containing initiators for anionic polymerization of monomers
An initiator is presented for anionically polymerizing monomers, to provide a functional head group on the polymer. A polymer having a functional head group derived from a sulfur containing anionic...
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7151147 |
Method for producing polymers using conjugated dienes and vinyl aromatic compounds, polymers produced according to said method and use thereof
This invention relates to a process for producing polymerisates by anionic polymerization in an inert reaction medium using conjugated dienes and vinylaromatic compounds in the presence of a...
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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...
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7005490 |
Method for making methacrylate unit-containing low-polydispersity polymers
The invention pertains to a method for making a methacrylate unit-containing polymer with polydispersity <1.7 and containing at least one cross-linkable functional group comprising a step of...
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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...
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6818710 |
Process for producing modified polymer rubber
There is provided a process for producing a modified polymer rubber, which comprises the steps of: (1) reacting one part by mol of an organoalkali metal compound with n±0.7 (n is an integer of 3...
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6762259 |
Process for the production of living (co)polymers and use of the (co)polymers
The purpose of the present invention is to provide polymerization catalyst which can produce quite efficiently (co)polymer having number average molecular weight and number of molecules which are...
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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...
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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...
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6657028 |
Anionic polymerization process
A batch process for the anionic polymerization of a styrenic monomer is described. The process brings together a liquid saturated hydrocarbon diluent, an ether promoter, an organolithium initiator...
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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...
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6515087 |
Synthesis of elastomers having low hysteresis
It is important for rubbery polymers that are used in tires, hoses, power transmission belts and other industrial products to have good compatibility with fillers, such as carbon black, silica,...
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6451949 |
Method for production of poly (trimethylene carbonate)
Disclosed is a process for the production of poly(trimethylene carbonate) which comprises reacting trimethylene carbonate, a catalyst, and an alcohol, preferably a polyhydric alcohol, under...
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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...
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H002030 |
Process for the preparation of random copolymers of conjugated dienes and vinyl aromatic compounds
Random copolymers of a conjugated diene and at least 50% by weight of a vinyl aromatic compound are prepared by slowly reacting the monomers in a non-polar solvent in the presence of a chelating...
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6277936 |
Perhalogenated thermoplastic (CO)polymers of chlorotrifluoroethylene
Chlorotrifluoroethylene (CTFE) thermoplastic copolymers, comprising: (a) from 0.15 to 4% by moles of one or more fluorodioxoles having the general formula: ##STR1## wherein: X 1 and X 2...
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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...
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6262204 |
Initiation system comprising a heterocyclic ligand for anionic polymerization of (METH)acrylic monomer(s) and polymerization process using same
The present invention relates to an initiation system comprising at least one initiator, with the exception of amides of alkaline metals, and at least one alkaline metal alcoholate of the formula...
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6221991 |
Methacrylate and acrylate polymers and processes for making same
Polar polymers having the following formula: FG-(Q) d -R n -Z-J-[A(R 1 R 2 R 3 )] x (I) wherein FG is H or a protected or non-protected functional group; Q is a polar hydrocarbyl group...
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6218485 |
Process for producing narrow polydispersity alkenylphenol polymer
A process for producing a monodisperse polymer which has a number-average molecular weight from 1,000 to 100,000 and a molecular weight distribution Mw (weight-average molecular weight)/Mn...
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6166160 |
Process for making deodorized rubbery polymer
There is a need for odorless rubbery polymers that offer high heat resistance, ultraviolet light resistance and low fogging characteristics. For instance, rubbery polymers of this type are needed...
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6153706 |
Protected multi-functionalized star polymers and processes for making the same
This invention provides novel protected, multi-functionalized multi-arm polymers, their optionally hydrogenated analogues and optionally deprotected analogues thereof, and processes for making...
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6153675 |
Fluorinated water-and oil-repellent agents with improved freeze-thaw stability
A water-dispersible, water- and oil-repellent agent, which comprises an aqueous emulsion comprising a copolymer of a fluoroalkyl group-containing monomer with vinylidene chloride or benzyl...
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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...
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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...
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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...
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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...
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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...
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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...
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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...
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5914378 |
Anionic copolymerization of conjugated dienes and vinyl arenes in the presence of alkyl ethers of tetrahydropyranyl methanol
Process for the preparation of a polymer by the polymerization of: (A) from 50 to 100 percent by weight of at least one diene monomer, (B) from 0 to 50 percent by weight of at least one...
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5906956 |
Lithium initiator system
This invention reveals an initiator system which is comprised of (a) a lithium initiator, (b) a sodium alkoxide and (c) a polar modifier; wherein the molar ratio of the sodium alkoxide to the...
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5900464 |
Processes for making methacrylate and acrylate polymers
Polar polymers having the following formula: FG--(Q) d --R n --Z--J-- A(R 1 R 2 R 3 )! x (I) wherein FG is H or a protected or non-protected functional group; Q is a polar hydrocarbyl group...
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5849847 |
Telechelic polystyrene/polyethylene copolymers and processes for making same
Polyalkenylaromatic-polyethylene copolymers are prepared using protected functional organolithium initiators. Polymerization of an alkenylsubstituted aromatic monomer followed by ethylene, results...
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5827929 |
Functionalized initiators for anionic polymerization
A process for the preparation of hydrocarbon solutions of monofunctional ether initiators of the following general structure: M--Z--O--C(R 1 R 2 R 3 ) wherein M is an alkali metal; Z is a...
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5798418 |
Star polymers from mixed initiators
The present invention provides novel, multi-arm or star-shaped polymers having mixed protected functional and non-functional ends, their optionally hydrogenated analogues, and the polymers produced...
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5795944 |
Programmed addition of heavy ethers for microstructure control of diene polymers
A process for the polymerization of dienes which comprises anionically polymerizing dienes in the presence of an anionic polymerization initiator and a microstructure control agent is improved by...
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5792815 |
Functionalized polymer produced with functionalized initiators by anionic polymerization
A process for the preparation of hydrocarbon solutions of monofunctional ether initiators of the following general structure: M--Z--O--C(R 1 R 2 R 3 ) wherein M is an alkali metal; Z is a...
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5717043 |
Process for preparing a polymer using lithium initiator prepared by in situ preparation
In a polymerization process of at least one of monomers selected from the group consisting of conjugated diene compounds such as butadiene and vinylaromatic compounds such as styrene, an...
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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....
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5698646 |
Process for producing elastomeric compound having reduced hysteresis
The present invention is directed toward anionic polymerization employing lithio aldimines mixed with an organic alkali metal compound and optionally, a chelating reagent. The lithio aldimines have...
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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...
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5677402 |
Process for preparing 3,4-polyisoprene rubber
This invention reveals an initiator system which is comprised of (a) a lithium initiator, (b) a sodium alkoxide and (c) a polar modifier; wherein the molar ratio of the sodium alkoxide to the...
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5674798 |
Hydrocarbon soluble anionic polymerization initiators
The 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...
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