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7625983 |
Process for the preparation of block copolymers for tire tread compositions and these copolymers
A process for the preparation of a functionalized, coupled or starred block copolymer which is usable in a sulphur-cross-linkable rubber composition of reduced hysteresis in the cross-linked state,...
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7560503 |
Gels from high molecular weight block copolymers
The present invention relates to gels prepared from novel anionic block copolymers of aromatic vinyl compounds and conjugated dienes. The block copolymers include a high molecular weight linear...
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7465768 |
Method to reduce coupling during termination with functional end-groups
A novel method of preparing carboxyl-terminated polymers. A monomer is mixed with an organolithium initiator in a hydrocarbon solvent so as to anionically polymerize linear living polymer lithium...
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7271207 |
Bituminous composition
A bituminous composition which comprises a bituminous component and a block copolymer which comprises at least two blocks of a conjugated diene and at least two blocks of a monovinylaromatic...
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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...
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7202310 |
Polymers, processes for producing the same, and curable compositions produced therefrom
An alkenyl- or crosslinkable silyl-terminated vinyl polymer is provided. Such a functional group is introduced into its terminus at a high ratio, not via sulfur atoms. Those polymers can be...
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7125834 |
Functional substances derived from oligoolefins having functional groups at the ends
This invention provides the following: an amphiphilic functional substance with lipophilicity, affinity for supercritical CO 2 , and if necessary hydrophilicity comprising an oligoolefin chain and...
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7094833 |
Block copolymer
Provided are a block copolymer including a polymer block containing acrylonitrile or methacrylonitrile as a principal constituent, which is excellent in heat resistance, weatherability, oil...
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7067591 |
Block copolymers and process for their preparation
A block copolymer having structural formula A-B or A-B-A, wherein A is a crystallizable isotactic polypropylene block segment and B is an amorphous olefin elastomeric block segment; the novel...
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7056985 |
End-capped polymer chains and products thereof
According to an aspect of the present invention, a method is provided in which a double diphenylethylene compound is reacted with a polymer that contains a carbocationically terminated chain...
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7009000 |
Coupled styrenic block copolymers and process for preparing same
Disclosed is an improvement to a process for preparing coupled styrenic block copolymers wherein adding from about 0.01 to about 1.5 equivalents of a metal alkyl compound per equivalent of living...
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7005394 |
Tackified thermoplastic-epoxy pressure sensitive adhesives
A pressure sensitive adhesive composition comprised of: a) 75 to 99.9 weight percent of a tackified thermoplastic polymer component comprising 1) 1–99 weight percent of a thermoplastic polymer...
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6964996 |
Pentablock copolymer and manufacturing method of the same
The present invention relates to a ternary copolymer represented by the following formula (1) of the penta-block structure, wherein the molecular weight is 50, 000 to 400,000, pB is more than 70%...
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6921793 |
Rubber compositions and vulcanizates including comb-branched polymers
A vulcanizate comprising a rubber, and a damping component that is prepared by preparing a mixture of living polymers that include living polymers with at least two living ends and living polymers...
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6916885 |
Method for breaking a chain during anionic polymerisation
A process for the preparation of linear polymers or block copolymers of styrene by anionic polymerization comprises carrying out the chain termination with an n-alkyl glycidyl ether or a dialkyl...
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6894114 |
Block copolymer
A block copolymer is obtained by anionic polymerization, includes two or more polymer blocks A miscible with each other, and at least one (meth)acrylic ester polymer block B immiscible with the...
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6875812 |
Resin composition containing graft copolymer
An object of the present invention is to provide an agent serving both as a compatibilizer and an impact strength-imparting agent, which is freed from layer separation phenomenon and capable of...
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6831134 |
Method for preparing transparent block copolymer resin, copolymer prepared thereby, and usage thereof
The present invention relates to a method for preparing a copolymer containing a combined linear and nonlinear block, that is, mikto block, a copolymer prepared from the method, and usages of the...
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6800689 |
Process for producing polymer rubber and oil extended polymer rubber
There is provided a process for producing polymer rubber, which comprises the step of polymerizing a conjugated diene monomer or a combination of a conjugated diene monomer with an aromatic vinyl...
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6777499 |
Multiblock interpolymers and processes for the preparation thereof
The present invention relates to multiblock interpolymers having the following symmetric structures and processes for their preparation: Y-X-Y, wherein Y represents a block of a random copolymer of...
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6765066 |
Copolymers prepared by using both anionic polymerization techniques and coordination catalysts
A process for forming a copolymer comprising the steps of (i) preparing a living polymer segment by using anionic polymerization techniques, (ii) modifying the living polymer by reacting it with an...
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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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6664357 |
Method for the preparation of a stable anaerobic/UV/visible light curable adhesive
An improved process for manufacturing a dual cure anaerobic/ultraviolet adhesive. The process includes the first step of mixing a polymerizable (meth)acrylate ester monomer, such as methacrylic...
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6429271 |
Fluoroelastomer composition having excellent processability and low temperature properties
Copolymers having copolymerized units of vinylidene fluoride, perfluoro(alkyl vinyl) ether, 2-hydropentafluoropropene, and, optionally, tetrafluoroethylene, exhibit excellent low temperature...
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6372863 |
Synthesis of styrene-butadiene rubber
This invention discloses a process for synthesizing random styrene-butadiene rubber comprising: (1) continuously charging 1,3-butadiene, styrene, an initiator, and a solvent into a first...
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6362282 |
Polymers with high vinyl end segments
A polymer composition comprising at least two end segments that make up less than 15% of the total polymer composition. Each end segment has a vinyl content greater than about 45%. However, the...
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6359087 |
Gas phase anionic polymerization of diene elastomers
The invention provides solid supported anionic catalysts, suitable for gas phase anionic polymerization of conjugated diene monomers, that are useful for anionically producing very high molecular...
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6355728 |
Block copolymer rubber composition comprising the same and pneumatic tire made therefrom
A block copolymer (1) containing a polymer block A of a conjugated diene and a random copolymer block B of a conjugated diene and aromatic vinyl compound, (2) having a weight ratio (A:B) of the...
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6329469 |
Fluoroelastomer composition having excellent processability and low temperature properties
Copolymers having copolymerized units of vinylidene fluoride, perfluoro(alkyl vinyl) ether, 2-hydropentafluoropropene, and, optionally, tetrafluoroethylene, exhibit excellent low temperature...
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6306976 |
Rubbery polymer and method for producing the same
Disclosed is a rubbery polymer comprising a conjugated diene polymer, and bonded thereto, a lithium-detached residue of a lithium-containing organic polymer used as a catalyst in the production of...
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6291584 |
Production of haze-free block copolymers
A process for reducing the water take up of a vinyl aromatic-conjugated diene polymer when subjected to a humid environment, the process comprising solution polymerising at least one vinyl aromatic...
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6268430 |
Ionomers and ionically conductive compositions
Disclosed are ionomers comprising functionalized polyolefins having fluoroalkyl sulfonate pendant groups and ionically conductive compositions formed therefrom by the addition of solvents.
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6242536 |
Process for preparation of block copolymers in mixed alkane/cycloalkane solvents
The dispersibility of the initial polystyrene block in forming a S-B-S type of copolymer is improved by first preparing a small block of homopolydiene such as homopolybutadiene as a dispersing...
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6239218 |
Hydrogenated block copolymer and composition of the same
A hydrogenated block copolymer comprising: at least two polymer blocks A mainly comprising vinylaromatic hydrocarbon compound monomer units; and at least two polymer blocks B mainly comprising...
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6228947 |
Deprotection of polymers prepared with silyloxy protected functional initiators by reaction with aqueous fluoroboric acid
The present invention provides a process for making functionalized polymers comprising the steps of (a) initiating polymerization of an unsaturated monomer with a lithium initiator having the...
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6180717 |
Block copolymer and rubber composition and pneumatic tire containing the same
A block copolymer (1) containing a polymer block A of a conjugated diene and a random copolymer block B of a conjugated diene and aromatic vinyl compound, (2) having a weight ratio (A:B) of the...
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6150463 |
Vinyl aromatic/conjugated diene block copolymers deactivated to alkali metal-alcoholate termination and treated with cyclic anhydride
The present invention related to a process for the treatment of vinyl aromatic/conjugated diene block copolymers. More particularly, the present invention relates to a process for the treatment of...
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6013735 |
Process for the preparation of acrylate and methacrylate polymers
A continuous process for the preparation of linear, branched and star-polymers via anionic polymerization of acrylic monomers, linear, branched and star-polymers obtained by the process and...
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5994476 |
Process for the preparation of a block copolymer composition
This invention relates to a process for preparing a block copolymer composition, wherein it comprises following successive steps: a step in which a vinyl aromatic monomer is polymerized in a...
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5990236 |
Preparation of impact-resistant polystyrene
Abstract of the disclosure: A process is described for the continuous preparation of an impact-resistant molding material by anionic polymerization of styrene or another aromatic vinyl compound or...
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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...
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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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5910546 |
Tapered block copolymers of monivinylarenes and conjugated dienes
A method for preparing tapered block copolymers which are particularly useful for blend components in blends with polymers of styrene. In the first embodiment of this invention the copolymers are...
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5837778 |
Multifunctional initiator for obtaining star-shaped polymers by an anionic route, process for its manufacture and corresponding star-shaped polymers, process for their manufacture and their applications
A multifunctional anionic polymerization initiator which is in the form of a star-shaped polymer, and which is soluble in a nonpolar medium and is substantially free of residual double bonds. The...
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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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5780551 |
Telechelic polymers from mixed initiator
This invention concerns novel, unsymmetrically protected, telechelically functionalized linear and star or multi-arm polymers, their optionally hydrogenated analogues, the polymers produced by...
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5770744 |
Process for the preparation of succinic anhydride
Maleic anhydride can be hydrogenated with hydrogen to give succinic anhydride by a catalyzed liquid-phase hydrogenation, by carrying out the hydrogenation continuously at a pressure of 50 to 400...
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5705569 |
Block copolymers of monovinylarenes and conjugated dienes and preparation thereof
A method for preparing resinous polymodal monovinylarene-conjugated diene block copolymers and polymers produced thereby are provided. The method comprises sequentially contacting under...
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5700874 |
Alkoxysilane-modified polymer and adhesive composition using said polymer
A polymer modified with an alkoxysilane is prepared by a reaction forming a bond between an alkoxysilane compound represented by General Formula (I) and at least one of end parts of a conjugated...
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5693718 |
Block copolymers having improved combinations of properties
Block copolymer compositions, comprising for a major part of linear triblock copolymers, comprising two terminal predominantly poly(monovinylaromatic) blocks having a real molecular weight in the...
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