Catalyst for polymerization of conjugated diene and process for

Details Catalyst for polymerization of conjugated diene and process for Catalyst for polymerization of conjugated diene and process for

1988-06-20

1990-09-04

Smith, Edward J.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Polymers from only ethylenic monomers or processes of...

502117, 526139, 526335, 568 13, 585369, 585508, C08F 4609, C08F 3606

Patent

active

049541250

ABSTRACT:
A catalyst consisting essentially of (A) a cobalt compound and (B) an organic phosphorus compound represented by the formula: ##STR1## wherein R.sup.1 and R.sup.2 are independently hydrogen atoms, alkyl groups or aryl groups, and three X's, which may be the same or different, are electron-donating groups. This catalyst is effectively used in a process for producing a conjugated diene polymer by polymerizing a conjugated diene in a hydrocarbon or halogenated hydrocarbon solvent in the presence of the above catalyst together with (C) an organoaluminum compound and (D) 0.25-1.5 mols, per mol of the organoaluminum compound (C), of water.

REFERENCES:
patent: 3498963 (1970-03-01), Ichikawa et al.
patent: 3522332 (1970-07-01), Ichikawa et al.
patent: 4182813 (1980-01-01), Makino et al.
patent: 4306085 (1981-12-01), Kim et al.
J. Org. Chem., vol. 25, Nov. 1960, pp. 2001-2006, A. E. Senear et al., "Derivatives of Triphenylphosphine and Triphenylphosphine Oxide".
J. Liebigs Annalen Der Chemie, vol. 715, 1968, pp. 1-14, H. Goetz et al., "Experimentelle Befunde zur Ladungsverteilung in Atylphosphin-[p-nitro-phenyl]".

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