Polymerization of difunctional ring compounds

Details Polymerization of difunctional ring compounds Polymerization of difunctional ring compounds

1986-04-24

1987-09-01

Michl, Paul R.

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

Synthetic resins

Polymers from only ethylenic monomers or processes of...

526170, C08F 464

Patent

active

046909923

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: 4542199 (1985-09-01), Kaminsky
patent: 4567244 (1986-01-01), Grubbs
patent: 4588794 (1986-05-01), Oda

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