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JPH0237927B2 |
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JPH0229684B2 |
This invention reveals a process for the nonaqueous dispersion polymerization of butadiene monomer in a reaction mixture containing a liquid nonaqueous dispersion medium, the improvement which comprises carrying out the polymerization of...
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JPH0219127B2 |
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JPH0215565B2 |
Diene polymers having a high content of cis-1,4 addition are prepared by polymerizing a 1,3-diene monomer in a hydrocarbon solvent in the presence of a catalyst composition comprising (a) a carboxylated metal oxy aluminate compound in wh...
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JPH0215564B2 |
Diene poiymers naving a hign content of cis-1,4 addition are prepared by polymerizing a 1,3-diene monomer in a hydrocarbon solvent in the presence of a catalyst composition comprising (a) a carboxylated metal oxy borate compound in which...
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JPH0291105A |
PURPOSE:To improve the workability in extrusion and rolling by controlling the molecular weight distribution curve to have a single peak and the ratio of the Z-average molecular weight to the Mooney viscosity to fall in a specified range...
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JPH027327B2 |
There is disclosed a process for the regulation of the molecular weight of a high-cis 1,4-Polybutadiene prepared by polymerizing 1,3-butadiene in a solution of an aliphatic and/or cycloaliphatic or aromatic solvent system employing as a ...
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JPH027326B2 |
A process for the regulation of the molecular weight of a high cis 1,4-polybutadiene prepared by polymerizing 1,3-butadiene in a solution of an aliphatic and/or cycloaliphatic solvent system employing as a catalyst system a mixture of (1...
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JPH022882B2 |
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JPH0157686B2 |
PURPOSE:To provide the titled rubber having low rolling frictional resistance, high wet-skid resistance, and excellent breakage characteristics, and containing specific amounts of vinyl bond and a bond between carbon and a metal selected...
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JPH0153285B2 |
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JPH0138100B2 |
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JPH0138099B2 |
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JPH0136481B2 |
A process for producing cyclized isoprene polymers having a dispersion degree not higher than 2, which comprises living-polymerizing isoprene monomers using as initiator an organometal compound which is expressed by a general formula RM ...
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JPH0125332B2 |
A rubber composition having excellent fracture properties and cut growth resistance is disclosed, which consists of 10-95 parts by weight of polybutadiene having a content of cis-1,4 bond of at least 70% and an average chain length of 1,...
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JPS6470506A |
PURPOSE: To obtain a cyano-containing polymer effective as a starting material in producing industrial rubber by reacting a polymer having double bonds with hydrogen cyanide at a specific temperature in the presence of specific catalysts...
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JPS642601B2 |
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JPS6361325B2 |
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JPS6355530B2 |
Organo-lithium compounds of the formula: wherein R is an alkyl group of up to 5 carbon atoms, R' is either hydrogen or an alkyl group of up to 5 carbon atoms and n is an integer from 2 to 10. These bifunctional organo-lithium compounds a...
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JPS6355529B2 |
Organo-lithium compounds of the formula: wherein R is an alkyl group of up to 5 carbon atoms, R' is either hydrogen or an alkyl group of up to 5 carbon atoms and n is an integer from 2 to 10. These bifunctional organo-lithium compounds a...
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JPS6336324B2 |
A polybutadiene rubber having an enhanced mechanical strength is produced in such a manner that the content of water in a solution of 1,3-butadiene in an inert organic solvent is controlled to 0.2 to 5 millemoles per liter of 1,3-butadie...
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JPS6324611B2 |
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JPS6320443B2 |
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JPS639525B2 |
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JPS638965B2 |
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JPS638966B2 |
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JPS631324B2 |
A process for preparing polybutadiene having a 1,2-configuration content of 5-40% and a cis-1,4-configuration content of 60% or more, which comprises polymerizing 1,3-butadiene in the presence of a catalyst consisting of: (A) a cobalt co...
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JPS6260404B2 |
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JPS6258613B2 |
The present invention discloses an aqueous polymerization medium comprising (1) a catalyst composition which contains (a) an organometallic compound and (b) a transition metal compound wherein said catalyst composition is microencapsulat...
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JPS6253014B2 |
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JPS62106908A |
Syndiotactic 1,2-polybutadiene of high quality may be obtained in excellent yield by solution polymerization of butadiene-(1,3) in hydrocarbons, using organometallic mixed catalysts composed of trialkylaluminium, hydrocarbon-soluble chro...
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JPS6216201B2 |
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JPS62500790A |
(57) [Abstract] Since this gazette is application data in front of an electronic application, the data of an abstract is not recorded.
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JPS628442B2 |
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JPS62170B2 |
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JPS62171B2 |
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JPS6154808B2 |
A process for the production of polybutadiene having a high cis-1,4-content by the polymerization of 1,3-butadiene in an aliphatic solvent in the presence of a catalyst consisting essentially of (a) an organoaluminum compound, (b) water,...
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JPS6154807B2 |
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JPS6154809B2 |
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JPS6139961B2 |
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JPS6138723B2 |
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JPS6138722B2 |
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JPS6138724B2 |
A polybutadiene rubber having an enhanced mechanical strength is produced by a process comprising two successive steps of: (A) cis-1,4-polymerizing 1,3-butadiene in a polymerization medium in the presence of a catalyst comprising a cobal...
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JPS6138203B2 |
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JPS6138202B2 |
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JPS6136035B2 |
A pressure-sensitive adhesive composition having excellent tackiness and improved thermal resistance comprises (A) a low molecular weight polyisoprene, which may be obtained by polymerizing isoprene monomer with the aid of a lithium-type...
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JPS6131125B2 |
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JPS6129606B2 |
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JPS6129605B2 |
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JPS6129604B2 |
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