Process for producing polybutadiene rubber with en

专利名称：Process for producing polybutadiene rubber

with enhanced mechanical strength

发明人：Maehara, Nobunori,Utada, Norihumi,Oda,

Taiji,Ashitaka, Hidetomo,Ishikawa, Hideo

申请号：EP82306792.1申请日：19821220公开号：EP0083190B1公开日：19860212

摘要：A polybutadiene rubber having an enhanced mechanical strength is produced insuch a manner that the contents of water and carbon disulfide in a solution of 1,3-butadiene and carbon disulfide in an inert organic solvent is controlled to 0.2 to 5 mmoles and 20 m moles or less, respectively, per liter of the 1,3-butadiene-carbondisulfide solution; a first polymerization mixture is prepared from the controlled 1,3-butadiene-carbon disulfide solution, an organic aluminum compound of the formula AlRX, wherein R = C alkyl, phenyl or cycloalkyl, X = halogen, and n = 1.5-2.0, and a cobaltcompound, for example, by aging a mixture of the controlled 1,3-butadiene-carbondisulfide solution with the aluminum compound for at least one minutes and then byadmixing the aged mixture with the cobalt compound; the first polymerization mixture issubjected to a cis-1,4- polymerization; a second polymerization comprising the resultantcis-1,4-polybutadiene, non-reacted 1,3-butadiene, the inert organic solvent, an organicaluminum compound of the formula AIR3, a cobalt compound, and the carbon disulfide issubjected to a 1,2-polymerization to produce a polybutadiene rubber consistingessentially of ε% to 30% by weight of a boiling n-hexane-insoluble fraction and 70% to

95% by weight of a boiling n-hexane-soluble fraction thereof; and after the 1,2-polymerization is shortstopped, the resultant polybutadiene rubber is isolated from the1,2- polymerization mixture.

申请人：UBE INDUSTRIES, LTD.

地址：12-32, Nishihonmachi 1-chome Ube-shi, Yamaguchi-ken 755 JP

国籍：JP

代理机构：Arthur, Bryan Edward

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