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JP6154891B2 |
A process for the preparation of branched polybutadiene having a high content of 1,4-cis units which comprises polymerizing butadiene in the presence of at least one organic solvent, and in the presence of: a) a catalytic system prepared...
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JP6128247B2 |
An organic silicon compound represented by formula (1) makes it possible to significantly lower the hysteresis loss of a cured product when added to a rubber composition and also imparts a rubber composition with which it is possible to ...
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JP2017066176A |
To provide a rubber composition for belt excellent in processability and abrasion resistance and a rubber belt.There is provided a rubber composition for belt containing polybutadiene (I) manufactured by polymerizing butadiene in a prese...
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JP6055827B2 |
The present invention provides a method for synthesizing a polybutadiene more efficiently and stably which is possible to obtain a rubber composition and a tire excellent in durability (fracture resistance, wear resistance and crack grow...
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JP6033479B2 |
Blends of syndiotactic 1,2-polybutadiene and rubbery elastomers are prepared by a process that comprises polymerizing 1,3-butadiene monomer into syndiotactic 1,2-polybutadiene within a rubber cement of at least one rubbery elastomer by u...
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JP6004249B2 |
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JP5994956B1 |
[Subject] A rubber cushion, a belt, a hose, or a rubber composition for footwear members produced by blending poly butadiene in which processability and abrasion resistance were improved is provided. [Means for Solution] A rubber cushion...
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JP2016160365A |
To provide a manufacturing method of a synthetic isoprene polymer latex capable of providing a dip molded body capable of obtaining high centrifugal separation yield and excellent in tensile strength.A manufacturing method of a synthetic...
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JP2016150946A |
To provide an isoprene polymer latex for dip molding good in mechanical stability after creaming and good in appearance of the resulting dip molded body.There is provided a latex of a synthetic isoprene polymer which is solution polymeri...
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JP5955211B2 |
A method of producing cis-1,4-polydienes, the method comprising the step of contacting conjugated diene monomer with a lanthanide-based catalyst system in the presence of less than 20% by weight of organic solvent based on the total weig...
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JP5928660B2 |
The present invention provides a polybutadiene having improved workability and abrasion resistance. A polybutadiene according to the present invention has: (A) a Mooney viscosity (ML 1+4,100°C ) being 43 or more; (B) a ratio (Tcp/ML 1+4...
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JP5917927B2 |
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JP5917895B2 |
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JP5902447B2 |
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JP5902446B2 |
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JP5902445B2 |
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JP5853329B2 |
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JP5856322B2 |
A continuous process for producing conjugated diene polymers comprising the steps of contacting, within an hydrocarbon solvent and within a continuous reactor, conjugated diene monomer and a catalyst composition prepared by combining: (a...
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JP5820025B2 |
A catalyst composition comprising (a) an iron-containing compound, (b) an organomagnesium compound and (c) a dihydrocarbyl hydrogen phosphite is disclosed for polymerizing 1,3-butadiene into syndiotactic 1,2-polybutadiene. The use of the...
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JP2015183076A |
To provide a material for medical equipment, in which a polymer obtained from β phellandrene as monomer, which is a material that can also be obtained from microorganisms or plants, etc. as a carbon neutral material, is used.Provided ar...
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JP5785191B2 |
Disclosed is an improved process for production of relatively gel free high cis-1,4-polybutadiene by polymerizing 1,3-butadiene monomer in presence of organocobalt-alkyl aluminum catalysts and a cycloalkane solvent system, the improvemen...
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JP5717452B2 |
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JP2015038222A |
To provide a simple and commercially-practicable method for producing a blend material of syndiotactic 1,2-polybutadiene (s-PBD) with a rubber-like elastic polymer.The method for producing the blend material of the s-PBD with the rubber-...
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JP2014224273A |
To provide vinyl-cis-polybutadiene rubber further improved in extrusion workability, tensile stress and fatigue resistance.There is provided a method for producing vinyl-cis-polybutadiene rubber containing a syndiotactic 1,2-polybutadien...
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JP5584239B2 |
A catalyst composition comprising (a) an iron-containing compound, (b) a dihydrocarbyl hydrogen phosphite, and (c) an organoaluminum compound is disclosed for polymerizing 1,3-butadiene into syndiotactic 1,2-polybutadiene. The use of the...
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JP5577406B2 |
High molecular weight, linear, neodymium-catalyzed polybutadiene comprising a high proportion of cis-1,4-units (more than 95%), a low proportion of 1,2-vinyl content (less than 1%) and a low molar mass distribution index, is new. The pol...
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JP5520284B2 |
Process for the preparation of polybutadiene effected by the polymerization of butadiene in an aliphatic and/or cyclo-aliphatic solvent in the presence of a catalytic system prepared in situ which comprises: (i) a carboxylate of neodymiu...
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JP5459116B2 |
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JP5447708B2 |
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JP5401011B2 |
A polymerisation catalyst comprising (1) a transition metal compound of Formula A, and optionally (2) an activating quantity of a Lewis acid activator. Z is a five-membered heterocyclic group containing at least one carbon atom, at least...
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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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JP5370076B2 |
To provide a modified rubber having high Mooney viscosity with a polybutadiene hydrosilylated with a diethylamino dimethylsilane, and its manufacturing method. The conjugated diene polymer modified product includes a polybutadiene includ...
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JP2013237843A |
To provide a method for producing cis-1,4-polydienes having a higher cis-1,4-linkage content and a narrower molecular weight distribution.A process for preparing a polydiene includes the step of polymerizing conjugated diene monomer with...
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JP5314812B1 |
The present invention relates to a rubber composition including (A) at least one rubber component selected from the group consisting of a synthetic rubber and a natural rubber; (B) a polymer of farnesene having a weight-average molecular...
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JP5318316B2 |
A process is described for obtaining a 1,3-butadiene homopolymer by the reaction of a catalytic system in the presence of 1,3-butadiene and one or more monoolefin(s) with 4 carbon atoms. This catalytic system is based on at least: a conj...
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JP5314811B1 |
The present invention relates to a rubber composition including (A) at least one rubber component selected from the group consisting of a synthetic rubber and a natural rubber; (B) a polymer of farnesene; and (C) carbon black having an a...
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JP5287436B2 |
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JP5266102B2 |
A catalyst composition comprising (a) an iron-containing compound, (b) an organomagnesium compound and (c) a dihydrocarbyl hydrogen phosphite is disclosed for polymerizing 1,3-butadiene into syndiotactic 1,2-polybutadiene. The use of the...
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JP2013136779A |
To provide an economical continuous polymerization process for producing conjugated diene polymers having a high cis-1,4-bonding content and narrow molecular weight distribution.A continuous process for producing conjugated diene polymer...
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JP2013122060A |
To provide a process for producing blends of syndiotactic 1,2-polybutadiene and rubbery elastomers.The blends of syndiotactic 1,2-polybutadiene and rubbery elastomers are prepared by a process that includes polymerizing 1,3-BD monomer in...
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JP5207770B2 |
A polymer containing units represented by the defined formula (1); and a process for producing the polymer, which comprises the step of polymerizing a compound represented by the defined formula (3), the units represented by the formula ...
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JP5153602B2 |
The present invention relates to a preparation method of aromatic organosulfur functionalized 1,4-cis polybutadiene comprising: polymerizing 1,3-butadiene or butadiene derivative in the presence of a specific catalyst in a nonpolar solve...
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JP2013014779A |
To provide an iron-based catalyst composition and to provide a process for producing syndiotactic 1,2-polybutadiene.The catalyst composition comprises (a) an iron-containing compound, (b) an organomagnesium compound and (c) a dihydrocarb...
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JP5097918B2 |
Crosslinkable synthetic polyisoprene (I) with an elongation of 150% under a tensile stress of at least 0.4 MPa, as measured by a defined test, is new. Crosslinkable synthetic polyisoprene (I) with an elongation of 150% under a tensile st...
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JP5089005B2 |
The crosslinkable rubber composition is crosslinkable at room temperature, has a gelation time at room temperature of 30 days or less, and can prepare a crosslinked rubber sheet by crosslinking the composition at room temperature, wherei...
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JP5014613B2 |
A process for the preparation of low branch content polybutadiene comprising: (a) a first butadiene polymerisation stage; (b) treatment of the polymer solution obtained upon completion of stage (a) with a coupling agent selected from: (i...
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JP5005337B2 |
Method for producing a purified C5 fraction (A), enriched in isoprene (I) and suitable for selective catalytic polymerization of (I), starting from an initial C5 fraction (B) from a fluidized-bed catalytic cracker. Method for producing a...
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JP4988145B2 |
The instant invention relates to multifunctional alkoxyamines based on polyalkylpiperidines, polyalkylpiperazinones and polyalkylmorpholinones and their use as polymerization regulatros/initiators. Further subjects of the invention are a...
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JP4970691B2 |
A catalyst composition that is the combination of or the reaction product of ingredients including (a) a molybdenum-containing compound, (b) a hydrogen phosphite, and (c) a blend of two or more sterically distinct organoaluminum compound...
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JP4963535B2 |
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