Cp.sub.2 TiCH.sub.2 -containing catalyst for polymerization of d

Details Cp.sub.2 TiCH.sub.2 -containing catalyst for polymerization of d Cp.sub.2 TiCH.sub.2 -containing catalyst for polymerization of d

1984-03-28

1986-08-19

Sneed, Helen M. S.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heavy metal containing

526160, 549 3, C07F 728

Patent

active

046071121

ABSTRACT:
A difunctional monomer containing a strained olefin ring and an unstrained olefin, ether group or other group polymerizable with Lewis acid or Ziegler-Natta coordination catalyst by forming a complex of the monomer and Cp.sub.2 TiCH.sub.2 (Cp is .eta..sup.5 --C.sub.5 H.sub.5) and heating the complex in presence of excess monomer to above the decomposition point. A controlled, selective opening of the ring with the strained olefin occurs to form a linear, soluble polymer having the non-polymerized group pendant from the chain. An improved catalyst is formed by preparing the catalyst with a base such as 4-dimethylaminopyridine that forms an insoluble adduct with AlR.sub.2 Cl which is precipitated and removed. Aluminum can also be eliminated by using a precursor of the formula: ##STR1## When compound (5) is reacted with monomer, the catalyst-monomer complex forms by elimination of a volatile component (isobutylene when R.sup.1 is Me and R is H) which is removed by venting.

REFERENCES:
patent: 3152157 (1964-10-01), Shapiro et al.
patent: 3274223 (1966-09-01), Feay
Bonds et al., JACS 97(8) pp. 2128-2132 (1975).
T. R. Howard, et al., J. Am. Chem. Soc. 6867 (1980) 102.
K. Ott, D. Straus, Ph.D. Theses, California Institute of Technology, (1983).
Can. J. Chem. 1599 (1965) 43.
J. Org. Chem. 3089 (1969) 34.

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