Process for selective production of cis-1,4-polybutadiene

Details Process for selective production of cis-1,4-polybutadiene Process for selective production of cis-1,4-polybutadiene

1994-05-16

1995-06-13

Teskin, Fred

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526139, 526140, 526141, 526142, 526143, 526165, 526335, 5263404, 502125, 502126, C08F 4649, C08F13606

Patent

active

054243793

ABSTRACT:
A catalyst for production of 1,4-polybutadiene which comprises
as the catalyst component (A) a transition metal compound represented by the formula M(R).sub.l (OR').sub.m X.sub.n-(l+m), wherein M denotes a transition metal atom, R and R' each denote a hydrocarbon group of 1-20 carbon atoms, X denotes a halogen atom, and l, m and n denote numerals satisfying the equations l.gtoreq.0, m.gtoreq.0 and n-(l+m).gtoreq.0, n corresponding to the valence of the transition metal,
as the catalyst component (B) an organoaluminum compound represented by the formula AlR.sup.1.sub.a X'.sub.3-a, wherein R.sup.1 denotes a hydrocarbon group of 1-20 carbon atoms, X denotes a halogen atom, and a denotes a numeral satisfying the equation 1.gtoreq.a.gtoreq.3, or an aluminoxane obtained by the reaction of said organoaluminum compound with water, and
as the catalyst component (C) an organic compound having at least two hydroxyl groups.

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Natta et al, "Stereospecific Polymerization of Conjugated Diolefins . . . ", Chimica e Industria, 40, 362 (1957).
Synthesis of Syndiotactic Poly-1,2-(4-methyl-1,3-pentadiene) Adolfo Zambelli et al., Macromolecules 1989, 22, pp. 2126-2128.

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