专利号:US-6184168-B1 优先权日:1997-09-22 标题:Synthesis of 1,4-trans-polybutadiene using a lanthanide organic acid salt catalyst 发明人:LYNCH THOMAS J 权利人:BRIDGESTONE CORP 摘要:The invention provides a catalyst composition, comprising: (a) an organolithium compound; and, (b) an organic acid salt of lanthanide series element; wherein: (1) only components (a) and (b) are required to promote the synthesis of 1,4-trans-polybutadiene; (2) the ratio of component (a) to component (b) is selected to maximize formation of the trans structure of said 1,4-trans-polybutadiene; and, (3) components (a) and (b) are selected for enabling further diblock synthesis. The invention further contemplates a process for using the catalyst to synthesize 1,4-trans-polybutadiene and other polymers and copolymers having trans configuration in the conjugated diene monomer contributed units.
专利号:US-9809661-B2 优先权日:2012-07-02 标 题 :Process for continuous synthesis of a diene elastomer 发明人:DUSSILLOLS JEROME; KIENER PIERRE; PAROLA HELENE 权利人:MICHELIN & CIE; MICHELIN RECH TECH; MICHELIN RECH TECH 摘要:A process for the continuous synthesis of diene elastomers with a high degree of conversion is provided. The process includes simultaneously:n a) introducing continuously into a polymerization reactor containing a gas phase and equipped with at least one stirring rotor and a discharge device, at least i. one or more monomers, including at least one conjugated diene monomer, and ii. from 0% to 70% by mass of an organic solvent, calculated relative to the total mass of monomers and of solvent b) continuously polymerizing the monomer(s), c) stirring the polymerization medium via the continuous movement of at least one stirring rotor about a rotary axle, d) continuously discharging the elastomer paste, e) continuously conveying the discharged elastomer paste to a chopping device and chopping it into particles, f) removing solvent from the particles of the elastomer paste, and g) recovering diene elastomer.
专利号:US-8519184-B2 优先权日:2010-07-05 标 题:Synthesis of rare earth metal extractant 发明人:SAKAKI KAZUAKI; SUGAHARA HIROTO; OHASHI TETSUYA; KUME TETSUYA; IKKA MASAHIKO; NAGANAWA HIROCHIKA; SHIMOJO KOJIRO 权利人:SAKAKI KAZUAKI; SUGAHARA HIROTO; OHASHI TETSUYA; KUME TETSUYA; IKKA MASAHIKO; NAGANAWA HIROCHIKA; SHIMOJO KOJIRO; SHINETSU CHEMICAL CO; NISSIN CHEMICAL IND 摘要:A rare earth metal extractant in the form of a dialkyl diglycol amic acid is synthesized by reacting diglycolic anhydride with a dialkylamine in a synthesis medium. A molar ratio (B/A) of dialkylamine (B) to diglycolic anhydride (A) is at least 1.0. A non-polar or low-polar solvent in which the dialkyl diglycol amic acid is dissolvable is used as the synthesis medium.
专利号:US-8933181-B2 优先权日:2006-10-06 标题:Branched polymers and methods for their synthesis and use 发明人:MOURI HIROSHI; LUO STEVEN; KURASCH JESSICA; ROBERTSON CHRISTOPHER G; WARREN SANDRA 权利人:MOURI HIROSHI; LUO STEVEN; KURASCH JESSICA; ROBERTSON CHRISTOPHER G; WARREN SANDRA; BRIDGESTONE CORP 摘要:Branched polymers including multi-branched polymers, functionalized branched polymers, star-branched polymers, and dendigraft polymers. Methods for the synthesis of branched polymers and method for the use of branched polymers in tire components are also included.
专利号:US-7312251-B2 优先权日:1999-04-26 标题 :Synthesis of stable solutions of rare earth tris (organophosphate) in hydrocarbon solvents 发明人:YUNLU KENAN; HE MIN 权利人:RHODIA RARE EARTHS INC 摘要:Stable rare earth tris (organophosphate) solutions comprise a rare earth tris (organophosphate) and a hydrocarbon solvent. From about 2% to about 10% rare earth element, preferably from about 3% to about 8%, is present in the solutions. The rare earth tris (organophosphate) solutions are stable from precipitation of the rare earth tris (organophosphate) for at least about fifteen (15) days, preferably for at least about twenty (20) days and most preferably at least about thirty (30) days. A process for preparing these solutions is described herein. A stabilizing additive, acid, glycol or mixtures thereof, is utilized to inhibit precipitation. The molar ratios of free acid, glycol and/or water to the rare earth element are controlled to inhibit precipitation.
专利号:US-8410254-B2 优先权日:2007-12-20 标 题:Method for the synthesis of a rare-earth organophosphate and use thereof for preparing a preformed catalytic system 发明人:THUILLIEZ JULIEN 权利人:THUILLIEZ JULIEN; MICHELIN RECH TECH; MICHELIN & CIE 摘要:A process for preparing a rare-earth organophosphate in the form of a gel that can be used as is for the preparation of a “preformedâ€? catalyst system intended, in particular, for the cis-1,4 stereospecific polymerization of conjugated dienes.