Title:
【発明の名称】高シス-1,4-ポリブタジエンの連続重合用触媒成分の製造法
Document Type and Number:
Japanese Patent JPH0710899
Kind Code:
B2
Abstract:
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 continuously to a single agitated polymerization reactor: (a) a monomer stream comprising 1,3-butadiene in a hydrocarbon solvent; (b) a preformed pi allyl catalyst stream formed by admixing a carboxylated metal oxy borate compound represented by the formulae (RCOOMO)3B or (ROCOOMO)2B-OR' wherein R and R' are alkyl radicals containing from 7 to 17 carbon atoms and M is nickel or cobalt, an organo aluminum compound, an alcohol, a small amount of 1,3-butadiene and a hydrocarbon solvent; and (c) a cocatalyst stream comprising a boron trifluoride complex with an alcohol; and (II) withdrawing continuously from said reactor high cis-1,4 polybutadiene at the same rate as said monomer, preformed catalyst and cocatalyst streams are fed to the reactor. In an additional embodiment of the invention, a method of preparing a preformed pi allyl catalyst having improved stability and solubility in hydrocarbon solvent is provided. High cis-1,4 polybutadiene polymers produced by the method of the invention have good green strength and tack and may be used as tire rubbers and impact modifiers for plastics.
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Inventors:
David M. Rotgman
Silycanto Earl Marani
Jiyun Dobri You Can
Silycanto Earl Marani
Jiyun Dobri You Can
Application Number:
JP27346591A
Publication Date:
February 08, 1995
Filing Date:
September 26, 1991
Export Citation:
Assignee:
The Firestone Tire and Rubber Company
International Classes:
C08F2/04; C08F2/06; C08F4/54; C08F4/60; C08F4/00; C08F4/70; C08F36/06; C08F136/06; (IPC1-7): C08F36/06; C08F2/06; C08F4/70
Domestic Patent References:
| JP423643B2 |
Attorney, Agent or Firm:
Heiyoshi Odashima