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JPH05247112A |
PURPOSE:To economically produce polybutadiene with a low gel content by adding a specific catalyst component to a polymerization solvent solution consisting essentially of cis-2-butene under specified conditions and polymerizing 1,3-buta...
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JPH0565525B2 |
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JPH05194658A |
PURPOSE:To obtain the subject polybutadiene rubber, composed of a specific polybutadiene, excellent in dynamic characteristics, abrasion resistance, tensile strength, flex crack growth resistance and impact resilience and suitable as bas...
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JPH05194623A |
PURPOSE:To obtain 1,2-polybutadiene by polymerizing 1,2-butadiene in the presence of a cobalt compound, etc., in a specific organic solvent to terminate conventional methylene chloride solvent's use, leading to prevention of environmenta...
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JPH0549690B2 |
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JPH05504366A |
Anionically polymerizable monomers containing at least one silicon or titanium atom form polymeric photoresists having good dry etch resistance for use in microlithography. The monomers are of the formula I wherein A is -H or -CH=CH2; X ...
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JPH05155937A |
PURPOSE:To provide the subject resin which has an excellent capability of tapping even when it contains a flame retardant or a flame retarding assistant. CONSTITUTION:The objective high-impact polystyrene contains a polybutadiene contain...
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JPH052685B2 |
A polybutadiene having an average 1,2-bond content of 18 to 32% by mole, a branched polymer chain content of 60% by weight or more and a Mooney viscosity at 100°C of 40 to 90, the viscosity of a 5% by weight concentration solution of th...
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JPH0469163B2 |
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JPH0469164B2 |
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JPH0465081B2 |
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JPH04266908A |
PURPOSE: To obtain the subject catalyst consisting of an organoiron compd., an organoaluminum compd., a chelate forming org. amine and a proton compd. in a specific ratio and useful for synthesizing a polymer excellent in crystallinity i...
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JPH04233915A |
PURPOSE: To provide a process wherein TPBD is synthesized on a high conversion level by an anionic polymerization process, and the control of a molecular weight is easy. CONSTITUTION: This process comprises the step of producing trans 1,...
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JPH04233916A |
PURPOSE: To provide a process for producing a hydrocarbon and a polymer thereof whereby a reaction of chlorine atom bonded to a tertiary carbon atom is made possible in order to obtain highly reactive end group and to provide polyisobuty...
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JPH0448815B2 |
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JPH0446965B2 |
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JPH0436161B2 |
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JPH0435481B2 |
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JPH04154820A |
PURPOSE:To economically obtain the title polymer of low gel content by polymerizing butadiene by a specific means in the presence of a Co compound-water- organoaluminum compound-based catalyst using a C4 fraction predominant in cis-buten...
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JPH0425289B2 |
A process for the preparation of polyisoprene by polymerizing isoprene in the presence of a beta-TiCl3 containing catalyst is disclosed thereby an activator is prepared by reacting a hydrocarbylaluminum compound and a hydroxy-aromatic co...
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JPH04122711A |
PURPOSE:To produce a polybutadiene having a low gel content and improved cost efficiency by polymerizing 1,3-butadiene at a temperature at which no phase separation occurs in the presence of a specified catalyst in a solvent based on cis...
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JPH0423643B2 |
A method for preparing high cis-1,4 polybutadiene by a continuous process which involves the continuous polymerization of 1,3-butadiene in solution under adiabatic conditions is provided. The method comprises the steps of: (I) feeding co...
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JPH0414681B2 |
A chloroprene polymer is produced by aqueous emulsion polymerization in the presence of a cyclic polysulfide compound which is employed in a quantity equal to at least 0.1% by weight of the weight of the chloroprene, followed by defloccu...
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JPH0446908A |
PURPOSE:To obtain a heat-meltable polymer which is soluble in an organic solvent and has moldability without detriment to the heat resistance, mechanical properties and electrical properties of a cured product by anionically polymerizing...
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JPH0363963B2 |
Diene polymers are prepared by polymerizing a conjugated diene in an organic solvent solution of an active lithium-terminated polymer in the presence of (A) a cobalt compound and (B) carbon disulphide and/or phenylisothiocyanic acid, sai...
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JPH0363964B2 |
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JPH0363566B2 |
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JPH0357128B2 |
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JPH0357127B2 |
A process for producing polybutadiene of a high degree of polymerization having high 1,2 and cis-1,4 microstructure contents and a low trans-1,4 microstructure content, which comprises polymerizing 1,3-butadiene in the presence of a cata...
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JPH0356566B2 |
A 1,2-polymerization of 1,3-butadiene is carried out in a polymerization solvent in the presence of a 1,2-polymerization catalyst consisting essentially of a cobalt compound soluble in the polymerization solvent, an organic aluminum hali...
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JPH0356565B2 |
Polybutadiene consisting of from 5% to 30% by weight of a boiling n-hexane-insoluble fraction and from 70% to 95% by weight of a boiling n-hexane-soluble fraction and having enhanced mechanical strength is prepared by polymerizing 1,3-bu...
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JPH0356567B2 |
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JPH0354688B2 |
This invention reveals a very useful process for producing polybutadiene composed essentially of syndiotactic 1,2-polybutadiene in tetrahydrofuran comprising polymerizing 1,3-butadiene in said tetrahydrofuran in the presence of (1) a cat...
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JPH0354684B2 |
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JPH03188109A |
PURPOSE:To produce a polybutadiene with a high cis-1,4 linkage content at a high yield by polymerizing a butadiene compd. in the presence of a catalyst system comprising a titanium compd., an aluminoxane, and an org. compd. contg. two or...
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JPH0341081B2 |
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JPH03131601A |
PURPOSE: To prepare the subject polymer which is suitable for the manufacture of industrial rubber products owing to medium viscosity and excellent workability by shearing a polychloroprene of relatively high viscosity under specific con...
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JPH0336842B2 |
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JPH0336071B2 |
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JPH0393813A |
PURPOSE:To provide the title polymer useful as a polymeric photopolymerization initiator for block copolymer production, capable of giving ABA-type block copolymers with chloroprene rubber as intermediate block. CONSTITUTION:The objectiv...
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JPH0322887B2 |
A new process is described for polymerizing and copolymerizing conjugate diolefins characterized by the use of a catalytic system comprising at least one compound of Group III B of the periodic system, at least one non-halogenated alumin...
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JPH0315943B2 |
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JPH0345609A |
PURPOSE:To obtain a polybutadiene rubber improved in its resilience without detriment to its merits by selecting a polybutadiene having specified contents of components soluble or insoluble in boiling n-hexane. CONSTITUTION:A polymer com...
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JPH035417B2 |
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JPH03860B2 |
Xanthogen disulphides of the following formula: wherein R and R1 independently represent hydrogen, C1-C6 alkyl, C5-C8-cycloalkyl or an oxygen-containing heterocyclic ring system having from 5 to 8 ring members and optionally mono- or tri...
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JPH0262123B2 |
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JPH02308834A |
PURPOSE:To obtain a pneumatic tire remarkably improved in abrasion resistance by using a rubber composition consisting essentially of high-trans polybutadiene rubber in a ground contact part of a tread part. CONSTITUTION:A pneumatic tire...
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JPH0246062B2 |
A polybutadiene rubber composition having an improved green strength is disclosed, which comprises a polybutadiene having a content of cis-1,4 bond of at least 70%, an average chain length of 1,4-bond of 110 DIFFERENCE 450 and a molecula...
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JPH0243775B2 |
A rubber composition having improved cut growth resistance, processability and dimensional stability is disclosed, which comprises not less than 20 parts by weight of polyisoprene having a melting point of not less than 10 DEG C. and a c...
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JPH0238081B2 |
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