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JP5550808B2 |
A process for producing homopolymers or copolymers of conjugated dienes comprising polymerising the diene monomer with a catalyst system comprising (A) two or more different transition metal compounds (B) a catalyst modifier (eg tripheny...
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JP5551383B2 |
The reduction of hysteresis in a silica-filled, vulcanized elastomeric compound is produced by mixing diene monomer and optionally monovinyl aromatic monomer with an initiator and a coordinator; effecting polymerization conditions; termi...
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JP5552667B2 |
To provide a material that can form a liquid crystal structure such as a bicontinuous cubic structure in a self organizing manner and moreover exhibits an excellent shape retaining property when used as an ion conductor. There are provid...
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JP5549856B2 |
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JP2014122359A |
To provide a modified conjugated diene polymer which has, when made into a vulcanizate containing silica-based inorganic filler, excellent balance between a low hysteresis loss property and safety-related characteristics such as wet skid...
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JP5535480B2 |
Process for producing homopolymers or copolymers of conjugated dienes by contacting monomeric material having at least one conjugated diene with a catalyst system including two or more different transition metal compounds and optionally ...
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JP5532580B2 |
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JP5525684B2 |
Producing a latex by emulsion polymerization of chloroprene and optionally other unsaturated comonomers comprises raising the temperature by at least 3[deg] C above the starting temperature up to a conversion of 50% and then by at least ...
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JP5520829B2 |
There is provided a modified conjugated diene-based polymer having a silyl group substituted with one or more alkoxy groups, and one or more nitrogen atoms on the chain ends of a conjugated diene-based polymer, the modified conjugated di...
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JP5519661B2 |
A method for preparing a functionalized polymer, the method comprising the steps of preparing a reactive polymer and reacting the reactive polymer with an imide compound containing a protected amino group.
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JP5511206B2 |
The present invention provides anionic polymerization initiators, comprising lithium amino magnesiate complexes, resulting in diene polymer and copolymer elastomers. The invention initiators have stable living ends at high polymerization...
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JP5511175B2 |
The present invention provides anionic polymerization initiators, comprising lithium amino magnesiate complexes, resulting in diene polymer and copolymer elastomers. The invention initiators have stable living ends at high polymerization...
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JP5513338B2 |
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JP5504861B2 |
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JP5508397B2 |
Butadiene copolymers are brominated using certain quaternary ammonium tribromides as the brominating agent in a first step, and then with elemental bromine in a second bromination step. The bromination process proceeds easily under mild ...
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JP5501692B2 |
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JP5504285B2 |
The present invention relates to an initiator system for synthesizing high-vinyl diene rubbers, to a method for producing diene homopolymers and diene copolymers having a high vinyl content at high polymerization temperatures, and to the...
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JP5488797B2 |
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JP2014084290A |
To provide a butadiene that enables production of a homogeneous butadiene polymer having a narrow molecular weight distribution.A butadiene containing composition contains a butadiene and an unsaturated cyclic ether.
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JP2014080619A |
To provide a novel initiator system which is especially suitable for anionic diene polymerization and which does not have disadvantages of the prior art, and which also permits the use of high polymerization temperatures to produce polyb...
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JP5485342B2 |
Provided are a chloroprene rubber that is less adhesive to rolls and gives a vulcanized product superior in physical properties, a production method thereof, a chloroprene rubber composition and a vulcanized product thereof. A chloropren...
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JP5485119B2 |
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JP5482935B1 |
To prevent oxidation of a polymer without affecting the environment, and to reduce residual chlorine which is a adjuvant residue, without affecting other components when made into a rubber composition. Provided are a method for producing...
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JP5475670B2 |
A method for preparing a functionalized polymer, the method comprising the steps of preparing a reactive polymer and reacting the reactive polymer with a heterocyclic nitrile compound.
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JP5468629B2 |
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JP5463838B2 |
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JP5457102B2 |
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JP5455337B2 |
Molecular weight degradation of a nitrile rubber comprises contacting the nitrile rubber with a metathesis catalyst containing a complex catalyst on the basis of 6th or 8th group metals and exhibiting at least one carbene group at the me...
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JP5451167B2 |
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JP5447707B2 |
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JP5447709B2 |
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JP5448445B2 |
To provide a pneumatic tire which improves run-flat durability without spoiling rolling resistance in usual running. The pneumatic tire includes a bead core, a carcass layer, a tread rubber layer, an inner liner, a side-reinforcing layer...
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JP5438131B2 |
A method for preparing a polydiene polymer, the method comprising: (i) preparing an active polymerization mixture by introducing conjugated diene monomer, and optionally monomer copolymerizable therewith, and a lanthanide-based catalyst ...
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JP5438132B2 |
A method for preparing a functionalized polymer, the method comprising the steps of polymerizing monomer to form a reactive polymer, and reacting the reactive polymer with a polycyano compound.
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JP2014040554A |
To provide butadiene and a method of producing the same, which enable production of a homogeneous butadiene polymer having a narrow molecular weight distribution.Provided is butadiene containing at least one selected from the group consi...
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JP2014040532A |
To provide a cyclic olefin addition polymer superior in thermal stability, mechanical strength and solubility, and a method of producing the same.The problem is solved by addition polymerization of a cyclic olefin compound of the followi...
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JP5428340B2 |
A method for producing a modified conjugated diene polymer includes a modification step (A) that subjects a conjugated diene polymer having a cis-1,4-bond content of 98.5% or more and possessing an active end to a modification reaction t...
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JP5428215B2 |
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JP2014024889A |
To provide a method of manufacturing polymer composition having high abrasion resistance, compounded with silica.A method of manufacturing polymer composition includes a step of forming a polymer component by polymerizing at least one ki...
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JP2014025043A |
To provide a novel method for manufacturing pentadiene alone or copolymer, and to provide a polymer.A method for manufacturing includes a polymerization process that polymerizes pentadiene by using a polymerization catalyst composition c...
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JP5405739B2 |
The present invention relates to nanocomposite materials based on a copolymer of at least two monomers selected from the group consisting of butadiene, isoprene and styrene and a clay mineral dispersed therein, and a process for preparin...
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JP5401988B2 |
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JP5396040B2 |
The present invention provides a catalytic system that can be used to prepare by polymerization diene elastomers comprising polyisoprenes and polybutadienes. The invention also provides a process for the preparation of the catalytic syst...
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JP5396783B2 |
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JP5389585B2 |
Aqueous polymer dispersions (I) obtained by polymerisation of chloroprene at 0-70[deg]C, optionally with unsaturated comonomers, in which the gel content (based on polymer) is increased by at least 10% to 1-60 wt% (from an original value...
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JP5390799B2 |
The reduction of hysteresis in a silica-filled, vulcanized elastomeric compound is produced by mixing diene monomer and optionally monovinyl aromatic monomer with a lithium amine initiator and, optionally, a modifier; effecting polymeriz...
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JP5375092B2 |
A method for producing a polybutadiene, which comprises subjecting 1,3-butadiene to cis-1,4 polymerization ,and subsequently subjecting a resultant in the resulting polymerization system to syndiotactic-1,2 polymerization, the method bei...
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JP5378749B2 |
An emulsion polymerization process for the preparation of polybutadiene grafted with styrene and acrylonitrile monomers in a reaction system is provided. The resultant product has a low end content of unreacted residual monomers, low yel...
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JP5369816B2 |
To provide a manufacturing method for a modified conjugated diene-based polymer capable of manufacturing a rubber product excellent in low heat generation property, a low temperature characteristic and wearing-resistance without impairin...
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JP5363515B2 |
Metal complexes, catalyst compositions containing the metal complexes, and processes for making the metal complexes and the catalyst compositions are described for the manufacture of polymers from ethylenically unsaturated addition polym...
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